Type B lactic acidosis: a rare oncological emergency.

Type B lactic acidosis is a rare metabolic complication of malignancy, more commonly in haematological malignancies. Due to the lack of formal prospective trials, treatment of lactic acidosis associated with malignancy is based on case reports. Given the poor prognosis, early recognition of type B lactic acidosis and prompt treatment are crucial. We report the first case of type B lactic acidosis in metastatic melanoma, followed by a brief literature review on the proposed pathophysiology and treatment.