[Unusual form of adrenal pheochromocytoma: asymptomatic cystic mass]. / Une forme rare de phéochromocytome surrénalien: masse kystique asymptomatique.

We report an adrenal cyst discovered in a 26-year-old woman with abdominal pain. Imaging (ultrasonography, computed tomography) demonstrated a 12 cm adrenal cystic mass suggestive of hydatic cyst of adrenal. She undergoes surgical exploration, when blood pressure increases. Pheochromocytoma diagnosis is reconsidered. Cystic pheochromocytoma is a rare tumour of the adrenal gland that can pose a diagnostic challenge.