Sponsor assessment:Temporal relationship:plausible; Risk/confounding factors:underlying malignant disease, pre-existing portal vein thrombus, medical history of atrial fibrillation, arterial hypertension, hypercholesterolemia, diabetes mellitus, a possible hypokalemia(not documented)and advanced age; Causality:none of these SAEs were related to the IMP.Medical history included:tinnitus grade 1; breast cancer; osteoporosis grade 2; Nolvadex for breast carcinoma; broad excision breast cancer; radiotherapy for breast cancer; appendectomy; laparoscopy preventive salpingo-oophorectomy; excision pigmented lesion left cheek; menopause, deep vein thrombosis left arm; pain in left hypochondrium grade 1; sensory neuropathy grade 1; and insomnia grade 2.Concomitant medication included:zolpidem for insomnia, and alendronate/colecalciferol for osteoporosis.On 28Jan16(Day+8 since the 3rd IMP infusion)the patient was admitted with a red spot in the neck and fever.Neutrophils were within normal range and blood culture showed positive for Streptococcus pyogenes.