Benign phyllodes tumour is a rare non-cancerous growth of the breast characterized by a solitary unilateral tumour in one breast, or rarely multifocal in one or both breasts. It is diagnosed on the basis of physical examination, imaging studies, and fine-needle aspiration cytology. In this report, we present a case of benign phyllodes tumour with an unusual presentation of recurrent attacks of hypoglycemia, which can be attributed to secretion of insulin-like growth factor II from the tumour.