Sym004

DLT: any of the following National Cancer Institute Common Toxicity Criteria for Adverse Events (NCI-CTCAE) Grade 4 hematologic or Grade 3/4 non-hematologic toxicities that occurred during DLT observation period of Part A, and were considered by Investigator to be at least possibly related to study treatment, and confirmed by Safety Monitoring Committee. Hematological toxicities: Grade 4 neutropenia, febrile neutropenia, Grade 4 thrombocytopenia, Grade 3 thrombocytopenia with bleeding episodes. Nonhematological toxicities: Grade 3 or higher non-hematological toxicity with exception of Grade 3 fatigue/skin toxicity; Grade 3 nausea/vomiting without appropriate prophylactic therapy; Grade 3 diarrhoea recovered within 2 days with adequate treatment or did not accompany fever/dehydration; Grade 3 or 4 laboratory liver parameter abnormalities with duration of less than 3 days.

An adverse event (AE) was defined as any untoward medical occurrence in a subject which does not necessarily have a causal relationship with the treatment. An AE was any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with use of a medicinal product, whether or not considered related to the medicinal product. A serious adverse event (SAE) was an AE that resulted in any of the following outcomes: death; life threatening; persistent/significant disability/incapacity; initial or prolonged inpatient hospitalization; congenital anomaly/birth defect or was otherwise considered medically important. AEs were considered treatment emergent if they started on or after the day of first administration of the Sym004 or if they started prior to administration but worsened after receiving the first dose of treatment.