| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Human epidermal growth factor receptor 2 (HER2)- expressing advanced colorectal cancer | 
 
| Cancro al colon-retto in fase avanzata che esprime HER2.  | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
| Human epidermal growth factor receptor 2 (HER2)- expressing advanced colorectal cancer | 
 
| Cancro al colon-retto in fase avanzata che esprime HER2.  | 
 
 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Cancer [C04] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 21.0 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10010029 | 
 
| E.1.2 | Term  | Colorectal cancer NOS | 
 
| E.1.2 | System Organ Class  | 100000004864 | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| To determine the objective response rate (ORR) of DS-8201a in HER2-expressing advanced metastatic colorectal cancer patients | 
 
| Determinare il tasso di risposta obiettiva (Objective Response Rate, ORR) di DS-8201a nei pazienti affetti da carcinoma del colon-retto in stadio avanzato, metastatico con espressione di HER2. | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
¿To evaluate duration of response (DoR), disease control rate (DCR), progression-free survival (PFS), and overall survival (OS). ORR assessed by the investigator is also evaluated. ¿To evaluate the safety of DS-8201a ¿To determine the pharmacokinetics (PK) of DS-8201a | 
 
¿	Stimare la durata della risposta (Duration of Response, DoR), il tasso di controllo della malattia (Disease Control Rate, DCR), la sopravvivenza senza progressione (Progression-Free Survival, PFS) e la sopravvivenza globale (Overall Survival, OS). Sar¿ inoltre valutata l¿ORR stimata dallo sperimentatore. ¿	Valutare la sicurezza di DS-8201a ¿	Determinare l¿analisi farmacocinetica (PK) di DS-8201a 
 | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
1. Pathologically documented unresectable, recurrent, or metastatic colorectal adenocarcinoma. Until sponsor's notification to the study sites, subject must be a (BRAF) wild-type cancer. 2. Received at least 2 prior regimens of standard treatment. 3. Has measurable disease assessed by the investigator based on RECIST version 1.1. 4. Has an Eastern Cooperative Oncology Group Performance Status (ECOG PS) of 0 to 1 | 
 
1.	Adenocarcinoma del colon-retto non resecabile, recidivante o metastatico, documentato dal punto di vista patologico. Fino alla notifica dello sponsor ai centri dello studio, il soggetto deve presentare un tumore ”wild-type” per BRAF. 2. Trattamento con almeno 2 regimi di trattamento standard in precedenza. 3. Ha una malattia misurabile verificata dallo sperimentatore sulla base dei RECIST V 1.1 4. Ha un ECOG PS da 0 a 1 
 | 
 
 
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| E.4 | Principal exclusion criteria | 
1. Medical history of myocardial infarction within 6 months before enrollment (study treatment), symptomatic congestive heart failure 2 Has a history of (non-infectious) ILD/pneumonitis that required steroids, has current ILD/pneumonitis, or where suspected ILD/pneumonitis cannot be ruled out by imaging at screening 3. Has spinal cord compression or clinically active central nervous system metastases, defined as untreated and symptomatic, or requiring therapy  | 
 
1.	Anamnesi di infarto miocardico nei 6 mesi precedenti l'arruolamento (trattamento dello studio), insufficienza cardiaca congestizia sintomatica 2. Ha avuto ILD/polmonite (non infettiva) che ha richiesto il trattamento con steroidi, soffre attualmente di ILD/polmonite o si sospetta tale malattia sulla base degli esami per immagini durante il periodo di screening 3. Compressione del midollo spinale o metastasi clinicamente attive al sistema nervosa central, definite come non trattate e sintomatiche, o che richiedono terapie   
 | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
Objective response rate (ORR) per imaging assessment - Percentage of participants with objective response per independent central imaging facility review based on Response Evaluation Criteria In Solid Tumors (RECIST) version 1.1 | 
 
| Tasso di risposta oggettivo (ORR) basato sui test per immagini - Percentuale di partecipanti con risposta oggettiva basata sui dati del laboratorio centralizzato per le immagini (criteri per la valutazione della risposta in t umori solidi - RECIST) versione 1.1 | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| Every 6 wekks | 
 
| Ogni 6 settimane | 
 
 
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| E.5.2 | Secondary end point(s) | 
¿Progression-free survival ¿Overall survival ¿Duration of response ¿Disease control rate (DCR) ¿ORR assessed by the investigator based on RECIST version 1.1 The following apply to categories; DS-8201a, total anti-HER2 antibody, and MAAA-1181a ¿Maximum serum/plasma concentration (Cmax) ¿ Time to Cmax (Tmax) ¿Area under the concentration-time curve (AUC) ¿AUC from the time of dosing until day 21 (AUC0-21d) | 
 
¿Sopravvivenza libera da progression ¿Sopravvivenza complessiva ¿Durata della risposta ¿Tasso di controllo della malattia (DCR) ¿ORR valutata dallo sperimentatore sulla base dei RECIST versione 1.1 
 I seguenti si applicano alle categorie; DS-8201a, anticorpo anti-HER2 totale e MAAA-1181a ¿Massima concentrazione plasma/siero (Cmax) ¿ Tempo per raggiungere la Cmax (Tmax) ¿Area sotto la curva (AUC) ¿AUC dal momento della somministrazione fino al giorno 21 (AUC0-21d) | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| Every 6 weeks for efficacy, OS for until death or last contact with subject | 
 
| Ogni 6 settimane per efficacia, OSfino alla morte o all'ultimo contatto con il paziente | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  No  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  Yes  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  No  | 
| E.8.1.2 | Open |  Yes  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  No  | 
| E.8.1.5 | Parallel group |  No  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  Yes  | 
| E.8.1.7.1 | Other trial design description | 
| Lo studio non è controllato, ma il sistema impedisce di andare oltre se non si clicca "Sì" al punto  | 
 
| The trial is not controlled, but the system impedes you to go further if point E.8.1 is "No" | 
 
 
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| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  No  | 
| E.8.2.3 | Other |  Yes  | 
| E.8.2.3.1 | Comparator description | 
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| E.8.2.4 | Number of treatment arms in the trial | 1 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  No  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 4 | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 10 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  Yes  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  Information not present in EudraCT  | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Japan | 
 
| United States | 
 
| Italy | 
 
| Spain | 
 
| United Kingdom | 
 
 
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| E.8.7 | Trial has a data monitoring committee |  No  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     | 
| End of OS follow-up | 
 
| Fine del follow-up per OS.  | 
 
 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 2 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 2 | 
| E.8.9.2 | In all countries concerned by the trial months | 0 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |