Phaeochromocytoma presenting with polyuria: an uncommon presentation of a rare tumour

Children rarely present with phaeochromocytoma. Their presentation differs from that of adults. The classic triad of sweating, headache and palpitation may not always present in children with phaeochromocytoma. In this study, we present a 6-year-old girl who came to us with polyuria and polydipsia for evaluation of suspected diabetes insipidus. She gave a clear history of increased sweating in the recent past. On clinical examination, she was noted to have high blood pressure. Subsequent investigations revealed a phaeochromocytoma. Her polyuria and hypertension resolved immediately after the surgery. We did not have the facilities to arrange for genetic tests; however, the patient and the family members are under follow-up for other associated conditions. LEARNING POINTS: Polyuria and polydipsia are rare symptoms of phaeochromocytoma. Complete physical examination prevented unnecessary investigations for polyuria and led to a correct diagnosis. Classic features are not always necessary for diagnostic evaluation of rare diseases.