Síndrome de apnea-hipopnea del sueño como causa de seudofeocromocitoma

Pheochromocytomas are rare neuroendocrine tumors that usually present as hypertension. The diagnosis is based on confirmation of excess production of catecholamines or their metabolites, followed by tumoral localization by imaging techniques. Nevertheless, catecholamines can be elevated in the absence of pheochromocytoma, giving rise to a false positive result. In these cases, the term pseudopheochromocytoma is used. We present the case of a male patient with an adrenal nodule and elevated catecholamines in 24-hour urine. Surgery was performed but catecholamine levels remained elevated. The patient was subsequently diagnosed with obstructive sleep apnea-hypopnea syndrome (OSAHS). After treatment, all disturbances disappeared. We diagnosed pseudopheochromocytoma in the context of OSAHS.