PMID- 21948491 OWN - NLM STAT- MEDLINE DCOM- 20120210 LR - 20181201 IS - 1758-1001 (Electronic) IS - 0004-5632 (Linking) VI - 48 IP - Pt 6 DP - 2011 Nov TI - A patient with a metastatic gastroenteropancreatic endocrine carcinoma causing hyperinsulinaemic hypoglycaemia and the carcinoid syndrome. PG - 579-83 LID - 10.1258/acb.2011.011068 [doi] AB - We present the case of a 57-year-old patient who initially presented with a constellation of symptoms including intense pruritis, flushing and diarrhoea. Following several months clinical deterioration, the patient was investigated radiologically, where multiple hepatic tumours were identified. Liver biopsy confirmed the presence of a well-differentiated metastatic gastroenteropancreatic endocrine carcinoma with biochemical evidence of serotonin secretion. Over a period of six months, the clinical course of the patient's disease progressed whereby severe hypoglycaemia became the major manifestation. Subsequent biochemical investigations confirmed the diagnosis of an insulinoma. Extensive radiological investigation revealed a solitary primary pancreatic tumour, indicating the presence of a metastatic pancreatic endocrine tumour (PET) secreting both insulin and serotonin. The patient was treated with a chemotherapy regimen consisting of 12 cycles of 5-fluorouracil/oxaliplatin, responding clinically - improved World Health Organization performance score from 3 to 1, biochemically - significantly reduced plasma chromogranin A and cancer antigen 19-9 concentrations and improved liver function tests, and radiologically - reduced pancreatic and hepatic tumour size. This is the first report of a primary PET secreting insulin and serotonin. Due to the association of serotonin-secreting gastroenteropancreatic endocrine tumours (GEP-ETs) with multiple endocrine neoplasia type-1 (MEN1) and biochemical evidence of an insulinoma, MEN1 should also be considered in such cases. The case provides further evidence for the biological heterogeneity of GEP-ETs and the myriad secretory humoral products and resultant clinical syndromes arising from such tumours. FAU - Hinchliffe, E AU - Hinchliffe E AD - Department of Clinical Biochemistry, University Hospital of South Manchester, Wythenshawe, Manchester M23 9LT, UK. ed_hinchliffe@hotmail.com FAU - Allcock, R L AU - Allcock RL FAU - Mansoor, W AU - Mansoor W FAU - Myers, M A AU - Myers MA LA - eng PT - Case Reports PT - Journal Article DEP - 20110923 PL - England TA - Ann Clin Biochem JT - Annals of clinical biochemistry JID - 0324055 RN - 0 (Antineoplastic Agents) RN - 0 (Organoplatinum Compounds) RN - 04ZR38536J (Oxaliplatin) RN - 12001-76-2 (Vitamin B Complex) RN - Q573I9DVLP (Leucovorin) RN - U3P01618RT (Fluorouracil) SB - IM MH - Antineoplastic Agents/administration & dosage MH - Antineoplastic Combined Chemotherapy Protocols/*therapeutic use MH - Bone Neoplasms/*secondary MH - Carcinoma/*secondary MH - Fluorouracil/administration & dosage MH - Humans MH - Hyperinsulinism/*diagnosis/etiology MH - Hypoglycemia/*diagnosis/etiology MH - Leucovorin/therapeutic use MH - Liver Neoplasms/*secondary MH - Malignant Carcinoid Syndrome/*diagnosis/etiology MH - Middle Aged MH - Organoplatinum Compounds/administration & dosage MH - Oxaliplatin MH - Pancreatic Neoplasms/complications/*diagnosis/drug therapy/pathology MH - Vitamin B Complex/therapeutic use EDAT- 2011/09/29 06:00 MHDA- 2012/02/11 06:00 CRDT- 2011/09/28 06:00 PHST- 2011/09/28 06:00 [entrez] PHST- 2011/09/29 06:00 [pubmed] PHST- 2012/02/11 06:00 [medline] AID - acb.2011.011068 [pii] AID - 10.1258/acb.2011.011068 [doi] PST - ppublish SO - Ann Clin Biochem. 2011 Nov;48(Pt 6):579-83. doi: 10.1258/acb.2011.011068. Epub 2011 Sep 23.