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    Clinical Trial Results:
    CDK4/6 inhibition in locally advanced/metastatic chordoma

    Summary
    EudraCT number
    2016-004660-19
    Trial protocol
    DE  
    Global end of trial date
    22 Dec 2022

    Results information
    Results version number
    v1(current)
    This version publication date
    02 Jan 2026
    First version publication date
    02 Jan 2026
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    NCT-2016-415
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT03110744
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Ruprecht-Karls-University Heidelberg, Medical Faculty
    Sponsor organisation address
    Im Neuenheimer Feld 672, Heidelberg, Germany, 69120
    Public contact
    NCT Trial Center, Heidelberg University Hospital, studienzentrale@nct-heidelberg.de
    Scientific contact
    NCT Trial Center, Heidelberg University Hospital, studienzentrale@nct-heidelberg.de
    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
    11 Dec 2023
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    22 Dec 2022
    Global end of trial reached?
    Yes
    Global end of trial date
    22 Dec 2022
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    Primary objective of this phase II trial is to gain first evidence of antitumor activity of palbociclib in adult patients with (locally) advanced or metastasized chordoma not amenable to curative treatment with surgery or radiotherapy.
    Protection of trial subjects
    During and following a patient’s participation in the trial, the investigator should ensure that adequate medical care was provided to a patient for any AE, including clinically significant laboratory values. The investigator should inform a patient when medical care was needed for intercurrent illness(es) of which the investigator becomes aware.
    Background therapy
    not applicable
    Evidence for comparator
    not applicable
    Actual start date of recruitment
    31 Jan 2018
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    Yes
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    Germany: 42
    Worldwide total number of subjects
    42
    EEA total number of subjects
    42
    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)
    26
    From 65 to 84 years
    16
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    First enrollment (FPI): 31.01.2018 Last Enrollment (LPI): 28.04.2022

    Pre-assignment
    Screening details
    Screening period (Baseline visit): Day -28 to 0

    Period 1
    Period 1 title
    overall trial (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Not applicable
    Blinding used
    Not blinded

    Arms
    Arm title
    Palbociclib
    Arm description
    -
    Arm type
    Experimental

    Investigational medicinal product name
    Palbociclib (Ibrance®)
    Investigational medicinal product code
    PD-0332991-00
    Other name
    Pharmaceutical forms
    Capsule, hard + tablet
    Routes of administration
    Oral use
    Dosage and administration details
    oral administration once per day for 21 days in a 28-day cycle

    Number of subjects in period 1 [1]
    Palbociclib
    Started
    28
    Completed
    28
    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: The given numbers cannot be adapted to the structure of the database.

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Palbociclib
    Reporting group description
    -

    Reporting group values
    Palbociclib Total
    Number of subjects
    28 28
    Age categorical
    Units: Subjects
        18-44
    3 3
        45-64
    15 15
        >=65
    10 10
    Age continuous
    Units: years
        arithmetic mean (standard deviation)
    58.9 ( 12.95 ) -
    Gender categorical
    Units: Subjects
        Female
    7 7
        Male
    21 21
    Subject analysis sets

    Subject analysis set title
    full analysis set
    Subject analysis set type
    Full analysis
    Subject analysis set description
    All enrolled patients who have finished at least one cycle of the study medication and who are evaluable for the primary endpoint are included in the full analysis set under the ITT principle. The primary endpoint is the disease control rate (DCR) after six cycles of palbociclib, which is defined as the presence of complete response (CR) or partial response (PR) or stable disease (SD) according to RECIST version 1.1.

    Subject analysis set title
    safety analysis set
    Subject analysis set type
    Safety analysis
    Subject analysis set description
    All enrolled patients who have received any amount of the study medication are subject of the safety population.

    Subject analysis sets values
    full analysis set safety analysis set
    Number of subjects
    25
    28
    Age categorical
    Units: Subjects
        18-44
    2
    3
        45-64
    13
    15
        >=65
    10
    10
    Age continuous
    Units: years
        arithmetic mean (standard deviation)
    60.1 ( 12.32 )
    58.9 ( 12.95 )
    Gender categorical
    Units: Subjects
        Female
    6
    7
        Male
    19
    21

    End points

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    End points reporting groups
    Reporting group title
    Palbociclib
    Reporting group description
    -

    Subject analysis set title
    full analysis set
    Subject analysis set type
    Full analysis
    Subject analysis set description
    All enrolled patients who have finished at least one cycle of the study medication and who are evaluable for the primary endpoint are included in the full analysis set under the ITT principle. The primary endpoint is the disease control rate (DCR) after six cycles of palbociclib, which is defined as the presence of complete response (CR) or partial response (PR) or stable disease (SD) according to RECIST version 1.1.

    Subject analysis set title
    safety analysis set
    Subject analysis set type
    Safety analysis
    Subject analysis set description
    All enrolled patients who have received any amount of the study medication are subject of the safety population.

    Primary: Disease Control Rate (DCR)

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    End point title
    Disease Control Rate (DCR)
    End point description
    The primary endpoint is the disease control rate (DCR) after six cycles of palbociclib, which is defined as the presence of complete response (CR) or partial response (PR) or stable disease (SD) according to RECIST version 1.1.
    End point type
    Primary
    End point timeframe
    From the six cycle of palbociclib to end of study.
    End point values
    Palbociclib full analysis set safety analysis set
    Number of subjects analysed
    28
    25
    28
    Units: rate
    number (confidence interval 95%)
        DCR
    0.440 (0.244 to 0.651)
    0.440 (0.244 to 0.651)
    0.393 (0.215 to 0.594)
    Statistical analysis title
    DCR analysis
    Statistical analysis description
    Null hypothesis: the true response rate p is less or equal to a reference rate p_0 is tested against a one-sided alternative, where p is the true response probability, p_0, the (uninteresting) reference response rate, and p_1 the (desirable) target level. In the final analysis the null hypothesis is rejected and the drug recommended for further development if 8 or more responses are observed in 43 patients. This design yields a type I error rate of =< 0.05 and power of >= 80% when p=0.25
    Comparison groups
    Palbociclib v full analysis set v safety analysis set
    Number of subjects included in analysis
    81
    Analysis specification
    Pre-specified
    Analysis type
    other [1]
    P-value
    ≤ 0.05 [2]
    Method
    Ratio
    Confidence interval
    Notes
    [1] - After 8 responders with stable disease (SD), it was decided to terminate the study as sufficient evidence was obtained to reject the null hypothesis. 42 patients were recruited and screened, of whom 28 started treatment with IMP.
    [2] - This p-value was used for the sample size calculation and the primary endpoint analysis consisted on a rate.

    Secondary: Tumor Response Rate (TRR)

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    End point title
    Tumor Response Rate (TRR)
    End point description
    The TRR is defined as the sum of complete response (CR) and partial response (PR) according to RECIST version 1.1 after six cycles of study medication.
    End point type
    Secondary
    End point timeframe
    From the six cycle of palbociclib to end of study.
    End point values
    Palbociclib full analysis set safety analysis set
    Number of subjects analysed
    28
    25
    28
    Units: Ratio
    number (not applicable)
        TRR
    0
    0
    0
    No statistical analyses for this end point

    Secondary: Progression-free survival (PFS)

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    End point title
    Progression-free survival (PFS)
    End point description
    PFS is defined as the time in months from first administration of the IMP to progression of disease or death from any cause, whichever occurs first. Patients without the event are censored on the last date of follow-up.
    End point type
    Secondary
    End point timeframe
    From first administration of the IMP to progression of disease or death from any cause, whichever occurs first (up to last patient last visit).
    End point values
    full analysis set safety analysis set
    Number of subjects analysed
    25 [3]
    28 [4]
    Units: months
    number (not applicable)
        Kaplan Meier Analysis: 25% estimate
    4.0
    2.8
        Kaplan Meier Analysis: 50% estimate
    5.8
    5.6
        Kaplan Meier Analysis: 75% estimate
    11.1
    11.1
    Attachments
    PFS safety analysis set
    PFS full analalysis set
    Notes
    [3] - 18 patients with event
    [4] - 20 patients with event
    No statistical analyses for this end point

    Secondary: Overall survival (OS)

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    End point title
    Overall survival (OS)
    End point description
    OS is defined as the time in months from first administration of the IMP to time of death from any cause. Patients without the event are censored on the last date of follow-up.
    End point type
    Secondary
    End point timeframe
    From first administration of the IMP to time of death from any cause (up to last patient last visit).
    End point values
    Palbociclib full analysis set safety analysis set
    Number of subjects analysed
    28 [5]
    25 [6]
    28 [7]
    Units: months
    number (not applicable)
        Kaplan Meier Analysis: 25% estimate
    10.8
    13.8
    10.8
        Kaplan Meier Analysis: 50% estimate
    24.6
    34.0
    24.6
        Kaplan Meier Analysis: 75% estimate
    50.1
    50.1
    50.1
    Attachments
    OS full analysis set
    OS safety analysis set
    Notes
    [5] - 14 patients with event
    [6] - 12 patients with event
    [7] - 14 patients with event
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    In this trial, all AEs that occur after first administration of the IMP are documented. The individual period of observation ends 28 days after the last dose of the IMP for chordoma.
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    25.1
    Reporting groups
    Reporting group title
    Safety population
    Reporting group description
    -

    Serious adverse events
    Safety population
    Total subjects affected by serious adverse events
         subjects affected / exposed
    10 / 28 (35.71%)
         number of deaths (all causes)
    14
         number of deaths resulting from adverse events
    2
    Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    Malignant neoplasm progression
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Metastases to peritoneum
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 1
    Neoplasm progression
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    tumor pain
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    General disorders and administration site conditions
    Fatigue
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Pain
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Social circumstances
    Social stay hospitalisation
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Respiratory, thoracic and mediastinal disorders
    Dyspnoea
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Pulmonary embolism
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Investigations
    Catheterisation cardiac
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Pulmonary arterial pressure increased
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Injury, poisoning and procedural complications
    Dislocation of vertebra
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Nervous system disorders
    Cerebrovascular accident
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Hypoaesthesia
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Paralysis
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Syncope
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Blood and lymphatic system disorders
    Febrile neutropenia
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    1 / 1
    Pancytopenia
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Ear and labyrinth disorders
    Vertigo
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Gastrointestinal disorders
    Intestinal perforation
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 1
    Mechanical ileus
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 1
    Skin and subcutaneous tissue disorders
    Decubitus ulcer
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Renal and urinary disorders
    Dysuria
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Renal failure
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Endocrine disorders
    Hypopituitarism
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Musculoskeletal and connective tissue disorders
    Osteolysis
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Infections and infestations
    Catheter site infection
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Implant site infection
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Pneumonia
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Sepsis
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    1 / 1
    Staphylococcal infection
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Metabolism and nutrition disorders
    Decreased appetite
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 1%
    Non-serious adverse events
    Safety population
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    27 / 28 (96.43%)
    Blood and lymphatic system disorders
    Anaemia
         subjects affected / exposed
    9 / 28 (32.14%)
         occurrences all number
    9
    Leukopenia
         subjects affected / exposed
    7 / 28 (25.00%)
         occurrences all number
    7
    Neutropenia
         subjects affected / exposed
    10 / 28 (35.71%)
         occurrences all number
    10
    General disorders and administration site conditions
    Asthenia
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Fatigue
         subjects affected / exposed
    6 / 28 (21.43%)
         occurrences all number
    6
    Gait disturbance
         subjects affected / exposed
    2 / 28 (7.14%)
         occurrences all number
    2
    General physical health deterioration
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Mucosal disorder
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Oedema
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Peripheral swelling
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Pyrexia
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Ear and labyrinth disorders
    Tinnitus
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Vertigo
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Vertigo positional
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Eye disorders
    Astigmatism
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Dry eye
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Gastrointestinal disorders
    Abdominal pain
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Abdominal pain upper
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Constipation
         subjects affected / exposed
    2 / 28 (7.14%)
         occurrences all number
    2
    Diarrhoea
         subjects affected / exposed
    4 / 28 (14.29%)
         occurrences all number
    4
    Dry mouth
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Dysphagia
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Flatulence
         subjects affected / exposed
    2 / 28 (7.14%)
         occurrences all number
    2
    Gastritis
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Gastrointestinal sounds abnormal
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Gastrooesophageal reflux disease
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Haemorrhoids
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Lip dry
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Nausea
         subjects affected / exposed
    5 / 28 (17.86%)
         occurrences all number
    5
    Proctalgia
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Stomatitis
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Toothache
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Vomiting
         subjects affected / exposed
    2 / 28 (7.14%)
         occurrences all number
    2
    Endocrine disorders
    Hypothyroidism
         subjects affected / exposed
    1 / 28 (3.57%)
         occurrences all number
    1
    Infections and infestations
    COVID-19
         subjects affected / exposed
    3 / 28 (10.71%)
         occurrences all number
    3

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    08 May 2018
    Substantial Amendment 1
    16 Nov 2020
    Substantial Amendment 2

    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
    For support, Contact us.
    The status and protocol content of GB trials is no longer updated since 1 January 2021. For the UK, as of 31 January 2021, EU Law applies only to the territory of Northern Ireland (NI) to the extent foreseen in the Protocol on Ireland/NI. Legal notice
    As of 31 January 2023, all EU/EEA initial clinical trial applications must be submitted through CTIS . Updated EudraCT trials information and information on PIP/Art 46 trials conducted exclusively in third countries continues to be submitted through EudraCT and published on this website.

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