A young man with extensor eruptive skin lesions.

To cite: Balasubramanian S, Mahadevan S, Seshadri K. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/ bcr-2015-213313 DESCRIPTION An obese 35-year-old man with a history of heavy alcohol consumption presented with non-pruritic papular skin eruptions of 3 months duration (figure 1). He was recently diagnosed to have type 2 diabetes, which was not well controlled (glycated haemoglobin, HbA1c 10.5%). Systemic examination was normal except for hepatomegaly. Serum biochemistry showed severe hypertriglyceridaemia (1550 mg/dL) (N:<150 mg/dL). Other laboratory investigations included mild elevation of transaminases and normal amylase, lipase, renal and thyroid functions. Ultrasound of the abdomen revealed significant hepatic steatosis. This clinical picture was consistent with the diagnosis of eruptive xanthoma due to severe hypertriglyceridaemia secondary to uncontrolled diabetes mellitus and alcohol intake. The patient was counselled on alcohol cessation and strict dietary measures, and placed on insulin therapy and metformin. In addition, fenofibrate was added to prevent pancreatitis. At 3 months of follow-up, his skin lesions had disappeared (figure 2), glycaemic control was better (HbA1c 8.1%) and lipid profile showed significant reduction in triglyceride levels (220 mg/dL) (N:<150 mg/dL). Eruptive xanthomas are round yellowish waxy skin lesions usually appearing in the back and extensor surface of the extremities, and are caused by severe hypertriglyceridaemia. The latter may be due to uncontrolled diabetes mellitus, alcoholism, morbid obesity with significant insulin resistance and uncontrolled hypothyroidism. The main risk of severe hypertriglyceridaemia is pancreatitis, and may be prevented with control of secondary causes and the judicious use of fibric acid derivatives.