A Normotensive Case of Pheochromocytoma With Unusual Presentation of Abdominal Pain

Multiple endocrine neoplasia (MEN) is an inherited, autosomal dominant condition characterized by primary parathyroid hyperplasia, medullary thyroid neoplasm, and pheochromocytoma. It most commonly presents with medullary thyroid cancer and less frequently with other complaints. Pheochromocytoma can also manifest through gastrointestinal complaints such as abdominal pain, nausea, and constipation. We present a normotensive case of pheochromocytoma, initially featuring abdominal pain and vomiting, which was later found to be associated with neck swelling and medullary thyroid cancer. The patient underwent an adrenalectomy and has continued to visit our endocrinology clinic for ongoing monitoring and treatment of iatrogenic hypoparathyroidism and hypothyroidism. A brief review is also provided.