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    Clinical Trial Results:
    A randomised, double-blind, parallel group, equivalence, multicentre phase III trial to compare the efficacy, safety and pharmacokinetics of HD201 to Herceptin® in patients with HER2+ early breast cancer

    Summary
    EudraCT number
    2016-004019-11
    Trial protocol
    FR   EE   HU   BG   PL   IT   ES  
    Global end of trial date
    13 Jan 2022

    Results information
    Results version number
    v1(current)
    This version publication date
    07 Sep 2025
    First version publication date
    07 Sep 2025
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    TROIKA
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    -
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Prestige Biopharma Limited
    Sponsor organisation address
    21 Biopolis Road, #04-24 Nucleos South Building, Biopolis, Singapore, Singapore, 138567
    Public contact
    Sumita Pradhan, Deputy Head of Regulatory and Medical Affairs, Prestige Biopharma Limited, sumita.pradhan@prestigebio.com
    Scientific contact
    Jamie Kim, Head of Regulatory and Medical Affairs, Prestige Biopharma Limited, jamie.kim@prestigebio.com
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    14 Jul 2023
    Is this the analysis of the primary completion data?
    No
    Global end of trial reached?
    Yes
    Global end of trial date
    13 Jan 2022
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    The primary objective of this study was to show equivalence of the total pathological complete response rate (tpCR) in patients treated with HD201 plus chemotherapy to that in patients treated with Herceptin® plus chemotherapy. tpCR was assessed at the time of surgery after 8 cycles of neoadjuvant treatment completion.
    Protection of trial subjects
    The study and clinical study protocols were reviewed and approved by Independent Ethics Committee (IEC) for each study centre. This study was conducted in accordance with the ethical principles that have their origin in the Declaration of Helsinki (2013) and that are consistent with the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) Good Clinical Practice (GCP) guidelines (ICH E6) and applicable local regulatory requirements and laws. The nature and purpose of the study was fully explained to each patient and written informed consent was obtained at Screening from each patient before any study related procedures were performed. The consent documents for the study were reviewed and approved by the appropriate IEC or IRB prior to use.
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    19 Feb 2018
    Long term follow-up planned
    Yes
    Long term follow-up rationale
    Safety
    Long term follow-up duration
    2 Years
    Independent data monitoring committee (IDMC) involvement?
    Yes
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    Poland: 1
    Country: Number of subjects enrolled
    Spain: 3
    Country: Number of subjects enrolled
    Bulgaria: 1
    Country: Number of subjects enrolled
    Estonia: 1
    Country: Number of subjects enrolled
    France: 2
    Country: Number of subjects enrolled
    Italy: 20
    Country: Number of subjects enrolled
    Belarus: 27
    Country: Number of subjects enrolled
    Georgia: 40
    Country: Number of subjects enrolled
    Malaysia: 18
    Country: Number of subjects enrolled
    Russian Federation: 302
    Country: Number of subjects enrolled
    Thailand: 21
    Country: Number of subjects enrolled
    Ukraine: 67
    Worldwide total number of subjects
    503
    EEA total number of subjects
    28
    Number of subjects enrolled per age group
    In utero
    0
    Preterm newborn - gestational age < 37 wk
    0
    Newborns (0-27 days)
    0
    Infants and toddlers (28 days-23 months)
    0
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    423
    From 65 to 84 years
    80
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    In total, 625 patients were screened between 19 February and 21 September 2018 across 70 centers in 12 countries and constitute the Total Set. 503 were randomised (251 to HD201 group and 252 to Herceptin® group) and 502 were treated and consititute the mFAS set (250 in HD201 group and 252 in Herceptin® group).

    Pre-assignment
    Screening details
    Key IC: HER2 overexpressed, non-metastatic, unilateral, newly diagnoses, operable early breast cancer of clinical stage II and III, including inflammatory breast cancer, histologically confirmed primary invasive carcinoma of the breast. Key EC: metastatic (stage IV) except supraclavicular nodes, bilateral or multicentric breast cancer.

    Period 1
    Period 1 title
    Treatment period (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Double blind
    Roles blinded
    Subject, Investigator

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    HD201
    Arm description
    Patients received HD201 every 3 weeks for 18 cycles (8 cycles of neoadjuvant treatment in combination with chemotherapy and 10 cycles of adjuvant therapy).
    Arm type
    Experimental

    Investigational medicinal product name
    HD201
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Powder for concentrate for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Dose regimen for neoadjuvant period: 8 mg/kg over 90 min (loading dose – Cycle 1), then 6 mg/kg over 60 min (maintenance dose – Cycle 2), then 6 mg/kg over 30 min every 3 weeks (maintenance dose –Cycles 2 to 8). Dose regimen for adjuvant period: 8 mg/kg over 90 min (loading dose – Cycle 9), then 6 mg/kg over 30 min (maintenance dose – Cycles 10 to 18) every 3 weeks.

    Arm title
    Herceptin®
    Arm description
    Patients received Herceptin® every 3 weeks for 18 cycles (8 cycles of neoadjuvant treatment in combination with chemotherapy and 10 cycles of adjuvant therapy).
    Arm type
    Active comparator

    Investigational medicinal product name
    Herceptin®
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Powder for concentrate for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Dose regimen for neoadjuvant period: 8 mg/kg over 90 min (loading dose – Cycle 1), then 6 mg/kg over 60 min (maintenance dose – Cycle 2), then 6 mg/kg over 30 min every 3 weeks (maintenance dose –Cycles 2 to 8). Dose regimen for adjuvant period: 8 mg/kg over 90 min (loading dose – Cycle 9), then 6 mg/kg over 30 min (maintenance dose – Cycles 10 to 18) every 3 weeks.

    Number of subjects in period 1 [1]
    HD201 Herceptin®
    Started
    250
    252
    Completed
    222
    228
    Not completed
    28
    24
         Adverse event/other
    4
    4
         Physician decision
    -
    1
         Progressive disease/adverse event
    7
    5
         Withdrawal by patient/non-compliance
    5
    8
         Adverse event/physician decision
    -
    2
         Adverse event/intercurrent illness
    2
    1
         Death
    4
    -
         Adverse event
    1
    1
         Adverse event/progressive disease
    1
    -
         Progressive disease
    2
    2
         Refusal/did not appear for surgery
    2
    -
    Notes
    [1] - The number of subjects reported to be in the baseline period are not the same as the worldwide number enrolled in the trial. It is expected that these numbers will be the same.
    Justification: One of the 503 patients was randomised by error at screening. After randomization to the HD201 treatment group, it appeared that the patient was a screen failure since she suffered from metastatic breast cancer. The remaining 502 patients, 250 in the HD201 treatment group and 252 in the Herceptin® treatment group, were all treated and constituted the mFAS.

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    HD201
    Reporting group description
    Patients received HD201 every 3 weeks for 18 cycles (8 cycles of neoadjuvant treatment in combination with chemotherapy and 10 cycles of adjuvant therapy).

    Reporting group title
    Herceptin®
    Reporting group description
    Patients received Herceptin® every 3 weeks for 18 cycles (8 cycles of neoadjuvant treatment in combination with chemotherapy and 10 cycles of adjuvant therapy).

    Reporting group values
    HD201 Herceptin® Total
    Number of subjects
    250 252 502
    Age categorical
    Units: Subjects
        Adults (18-64 years)
    210 212 422
        From 65-84 years
    40 40 80
    Age continuous
    Units: years
        median (standard deviation)
    53.69 ( 11.52 ) 54.21 ( 11.41 ) -
    Gender categorical
    Units: Subjects
        Female
    250 252 502

    End points

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    End points reporting groups
    Reporting group title
    HD201
    Reporting group description
    Patients received HD201 every 3 weeks for 18 cycles (8 cycles of neoadjuvant treatment in combination with chemotherapy and 10 cycles of adjuvant therapy).

    Reporting group title
    Herceptin®
    Reporting group description
    Patients received Herceptin® every 3 weeks for 18 cycles (8 cycles of neoadjuvant treatment in combination with chemotherapy and 10 cycles of adjuvant therapy).

    Subject analysis set title
    PPS
    Subject analysis set type
    Per protocol
    Subject analysis set description
    All patients of the mFAS who received neoadjuvant and adjuvant study medication according to the protocol, without any major protocol deviation impacting the primary efficacy assessment, and who had surgery after completion of neoadjuvant treatment or did not undergo surgery due to lack of efficacy. Protocol deviations were assessed during a pre-analysis review meeting that was held before database lock.

    Subject analysis set title
    SAF
    Subject analysis set type
    Safety analysis
    Subject analysis set description
    All patients of the FAS who received at least one dose of neoadjuvant study medication (HD201 or Herceptin®)

    Primary: Total pathological complete response (tpCR)

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    End point title
    Total pathological complete response (tpCR)
    End point description
    Complete absence of cancer cells in the breast and in the axillary lymph nodes (ypT0/is, ypN0) assessed locally in specimen obtained during surgery
    End point type
    Primary
    End point timeframe
    At the time of surgery after 8 cycles of neoadjuvant treatment completion.
    End point values
    HD201 Herceptin®
    Number of subjects analysed
    238
    236
    Units: Percentage
        arithmetic mean (confidence interval 95%)
    49.8 (42.7 to 56.8)
    51.9 (45.0 to 58.7)
    Statistical analysis title
    Risk Difference Analysis for tpCR in PPS
    Statistical analysis description
    To show the equivalence in terms of the tpCR rate between HD201 and Herceptin® within pre-defined equivalence margins, which was set to [−15% ; 15%] in this study.
    Comparison groups
    HD201 v Herceptin®
    Number of subjects included in analysis
    474
    Analysis specification
    Pre-specified
    Analysis type
    equivalence
    Method
    Parameter type
    Risk difference (RD)
    Point estimate
    -2.1
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    -11.6
         upper limit
    7.5

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    Treatment emergent adverse events (TEAEs) are reported for the entire treatment period.
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    21.0
    Reporting groups
    Reporting group title
    HD201
    Reporting group description
    Patients received HD201 every 3 weeks for 18 cycles (8 cycles of neoadjuvant treatment in combination with chemotherapy and 10 cycles of adjuvant therapy).

    Reporting group title
    Herceptin®
    Reporting group description
    Patients received Herceptin® every 3 weeks for 18 cycles (8 cycles of neoadjuvant treatment in combination with chemotherapy and 10 cycles of adjuvant therapy).

    Serious adverse events
    HD201 Herceptin®
    Total subjects affected by serious adverse events
         subjects affected / exposed
    24 / 250 (9.60%)
    17 / 252 (6.75%)
         number of deaths (all causes)
    7
    1
         number of deaths resulting from adverse events
    Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    Uterine leiomyoma
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Vascular disorders
    Essential hypertension
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Hypertensive crisis
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    General disorders and administration site conditions
    Sudden death
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 1
    0 / 0
    Immune system disorders
    Hypersensitivity
         subjects affected / exposed
    2 / 250 (0.80%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    1 / 2
    0 / 2
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Reproductive system and breast disorders
    Colpocele
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Uterine polyp
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Investigations
    Liver function test abnormal
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Injury, poisoning and procedural complications
    Post procedural haematoma
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Post procedural inflammation
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cardiac disorders
    Myocardial infarction
         subjects affected / exposed
    2 / 250 (0.80%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 2
    0 / 0
    Cardiorespiratory arrest
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 1
    0 / 0
    Supraventricular tachycardia
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cardiac failure chronic
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    1 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cytotoxic cardiomyopathy
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Nervous system disorders
    Haemorrhagic stroke
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Seizure
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 2
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cerebrovascular accident
         subjects affected / exposed
    2 / 250 (0.80%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Blood and lymphatic system disorders
    Febrile neutropenia
         subjects affected / exposed
    6 / 250 (2.40%)
    4 / 252 (1.59%)
         occurrences causally related to treatment / all
    0 / 6
    0 / 4
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Anaemia
         subjects affected / exposed
    2 / 250 (0.80%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Neutropenia
         subjects affected / exposed
    1 / 250 (0.40%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Eye disorders
    Open angle glaucoma
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Gastrointestinal disorders
    Diarrhoea
         subjects affected / exposed
    2 / 250 (0.80%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Infections and infestations
    Pneumonia
         subjects affected / exposed
    0 / 250 (0.00%)
    3 / 252 (1.19%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 4
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Bronchitis
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Influenza
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Mastitis
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Septic shock
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Urinary tract infection
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Erysipelas
         subjects affected / exposed
    0 / 250 (0.00%)
    1 / 252 (0.40%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Opisthorchiasis
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Metabolism and nutrition disorders
    Hyperglycaemia
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Hyponatraemia
         subjects affected / exposed
    1 / 250 (0.40%)
    0 / 252 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    HD201 Herceptin®
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    226 / 250 (90.40%)
    230 / 252 (91.27%)
    Investigations
    Alanine aminotransferase increased
         subjects affected / exposed
    35 / 250 (14.00%)
    41 / 252 (16.27%)
         occurrences all number
    52
    60
    Aspartate aminotransferase increased
         subjects affected / exposed
    37 / 250 (14.80%)
    31 / 252 (12.30%)
         occurrences all number
    52
    54
    Gamma-glutamyltransferase increased
         subjects affected / exposed
    19 / 250 (7.60%)
    29 / 252 (11.51%)
         occurrences all number
    25
    45
    Neutrophil count decreased
         subjects affected / exposed
    15 / 250 (6.00%)
    8 / 252 (3.17%)
         occurrences all number
    23
    12
    Blood alkaline phosphatase increased
         subjects affected / exposed
    15 / 250 (6.00%)
    24 / 252 (9.52%)
         occurrences all number
    23
    38
    Ejection fraction decreased
         subjects affected / exposed
    21 / 250 (8.40%)
    21 / 252 (8.33%)
         occurrences all number
    22
    22
    Electrocardiogram abnormal
         subjects affected / exposed
    16 / 250 (6.40%)
    9 / 252 (3.57%)
         occurrences all number
    21
    9
    Injury, poisoning and procedural complications
    Procedural pain
         subjects affected / exposed
    36 / 250 (14.40%)
    44 / 252 (17.46%)
         occurrences all number
    37
    49
    Radiation skin injury
         subjects affected / exposed
    16 / 250 (6.40%)
    16 / 252 (6.35%)
         occurrences all number
    16
    16
    Vascular disorders
    Hypertension
         subjects affected / exposed
    11 / 250 (4.40%)
    16 / 252 (6.35%)
         occurrences all number
    11
    21
    Cardiac disorders
    Sinus tachycardia
         subjects affected / exposed
    16 / 250 (6.40%)
    16 / 252 (6.35%)
         occurrences all number
    17
    17
    Mitral valve incompetence
         subjects affected / exposed
    10 / 250 (4.00%)
    14 / 252 (5.56%)
         occurrences all number
    10
    16
    Nervous system disorders
    Peripheral sensory neuropathy
         subjects affected / exposed
    12 / 250 (4.80%)
    13 / 252 (5.16%)
         occurrences all number
    12
    13
    Headache
         subjects affected / exposed
    26 / 250 (10.40%)
    22 / 252 (8.73%)
         occurrences all number
    33
    30
    Dysgeusia
         subjects affected / exposed
    9 / 250 (3.60%)
    13 / 252 (5.16%)
         occurrences all number
    14
    25
    General disorders and administration site conditions
    Asthenia
         subjects affected / exposed
    68 / 250 (27.20%)
    66 / 252 (26.19%)
         occurrences all number
    235
    210
    Fatigue
         subjects affected / exposed
    62 / 250 (24.80%)
    67 / 252 (26.59%)
         occurrences all number
    117
    104
    Oedema peripheral
         subjects affected / exposed
    17 / 250 (6.80%)
    14 / 252 (5.56%)
         occurrences all number
    26
    14
    Pyrexia
         subjects affected / exposed
    17 / 250 (6.80%)
    13 / 252 (5.16%)
         occurrences all number
    20
    15
    Blood and lymphatic system disorders
    Neutropenia
         subjects affected / exposed
    76 / 250 (30.40%)
    77 / 252 (30.56%)
         occurrences all number
    142
    137
    Anaemia
         subjects affected / exposed
    70 / 250 (28.00%)
    61 / 252 (24.21%)
         occurrences all number
    111
    90
    Leukopenia
         subjects affected / exposed
    44 / 250 (17.60%)
    51 / 252 (20.24%)
         occurrences all number
    82
    92
    Hyperglobulinaemia
         subjects affected / exposed
    14 / 250 (5.60%)
    13 / 252 (5.16%)
         occurrences all number
    36
    27
    Thrombocytopenia
         subjects affected / exposed
    13 / 250 (5.20%)
    10 / 252 (3.97%)
         occurrences all number
    21
    11
    Gastrointestinal disorders
    Nausea
         subjects affected / exposed
    86 / 250 (34.40%)
    93 / 252 (36.90%)
         occurrences all number
    238
    235
    Diarrhoea
         subjects affected / exposed
    45 / 250 (18.00%)
    45 / 252 (17.86%)
         occurrences all number
    73
    66
    Vomiting
         subjects affected / exposed
    21 / 250 (8.40%)
    18 / 252 (7.14%)
         occurrences all number
    33
    26
    Stomatitis
         subjects affected / exposed
    19 / 250 (7.60%)
    14 / 252 (5.56%)
         occurrences all number
    23
    22
    Skin and subcutaneous tissue disorders
    Alopecia
         subjects affected / exposed
    202 / 250 (80.80%)
    200 / 252 (79.37%)
         occurrences all number
    202
    200
    Rash
         subjects affected / exposed
    26 / 250 (10.40%)
    17 / 252 (6.75%)
         occurrences all number
    43
    30
    Musculoskeletal and connective tissue disorders
    Arthralgia
         subjects affected / exposed
    40 / 250 (16.00%)
    31 / 252 (12.30%)
         occurrences all number
    65
    57
    Bone pain
         subjects affected / exposed
    19 / 250 (7.60%)
    16 / 252 (6.35%)
         occurrences all number
    36
    46
    Myalgia
         subjects affected / exposed
    16 / 250 (6.40%)
    19 / 252 (7.54%)
         occurrences all number
    23
    27
    Metabolism and nutrition disorders
    Hypoproteinaemia
         subjects affected / exposed
    20 / 250 (8.00%)
    17 / 252 (6.75%)
         occurrences all number
    39
    33
    Hypocalcaemia
         subjects affected / exposed
    14 / 250 (5.60%)
    15 / 252 (5.95%)
         occurrences all number
    26
    25
    Decreased appetite
         subjects affected / exposed
    13 / 250 (5.20%)
    12 / 252 (4.76%)
         occurrences all number
    19
    21

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    19 Apr 2018
    The following changes were implemented in the first protocol amendment: • Dual ISH (DISH) test was added to the inclusion criteria to assess overexpression of HER2+. • Section on blinding was updated to indicate that the pharmacists were only partially blinded, not blinded. • Details were added on dosing regimen, period (neoadjuvant, surgery, adjuvant), treatment cycle and treatment duration.
    26 Apr 2018
    The following changes were implemented in the local protocol amendment for France: • The following exclusion criteria were added (EC 19 to 22): o Patients with stage 1 breast cancer. o Patients with acute urinary tract infection or pre-existing haemorrhagic cystitis. o Patients who have received live attenuated vaccines. o Patients who have received prohibited drugs.
    01 Oct 2018
    The following changes were implemented in the second protocol amendment: • Planned completion of recruitment changed from Q2 2018 to Q3 2018, planned end of study changed from Q4 2021 to Q1 2022, and analysis of primary endpoint changed from Q4 2018 to Q1 2019. • Timepoints were added for the collection of immunogenicity samples to include Cycle 5 (this sample was to only be tested if pre-surgery sample was ADA-positive), post-surgery (before Cycle 10), and before Cycle 14. • Addition of NAb testing, in which only ADA-positive samples were to be tested for NAb • Section on PK analysis was updated with a change in the number of patients required for PK analysis. While PK samples were taken for all the patients that were randomised to treatment on cycle 5 and 8, PK testing was only performed on the first 320 patient samples to obtain values for approximatively 150 patients in each treatment group. The remaining samples were to be stored for potential future analysis. • IHC2+/DISH+ was added to define HER2 positive tumours • Timing of central reading of tpCR was altered to “to be performed at a later stage”. To be noted that central reading of tpCR occurred after unblinding.

    Interruptions (globally)

    Were there any global interruptions to the trial? No

    Limitations and caveats

    Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data.
    None reported
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