[A case of pheochromocytoma detected by hypertensive crisis immediately after drip infusion urography].

We report a rare case of a 60-year-old man with a pheochromocytoma detected by a hypertensive crisis immediately after drip infusion urography. The patient initially consulted our hospital complaining of dysuria. He underwent a drip infusion urography and experienced a hypertensive crisis. The next day he was diagnosed with paralytic ileus. An endocrinological examination, abdominal computed tomography and 123I-metaiodobenzyl-guanidine scintigraphy revealed a pheochromocytoma. The tumor mass was removed, and immediately his blood pressure became normal and the paralytic ileus improved; however, temporary postoperative hypoglycemia was seen. Frequent monitoring of his blood glucose and the administration of an appropriate solution of dextrose, both during and after the operation, were recommended.