[Pediatric Multiple Endocrine Neoplasia Type 2B with Pheochromocytoma Diagnosed after Perforation of a Colonic Diverticulum : A Case Report].
2021
A 12-year-old girl was found to have decending colon diverticulum perforation and retroperitoneal abscess on computed tomography (CT) carried out to determine the cause of fever and stomachache. CT-guided drainage tube placement was performed. She was suspected of having MEN2B from her specific facial appearance, Marfan-like body shape and lingual mucosa neuroma. Cervical ultrasonography and serum tumor marker revealed medullary thyroid carcinoma and metastasis to cervical lymph node. Genetic examination revealed a mutation of RET gene codon 918. Therefore, she was diagnosed as having MEN2B. Laboratory data showed elevated urinary catecholamines. Metaiodobenzylguanidine (MIBG) adrenal scintigraphy showed bilateral adrenal uptake and a definitive diagnosis of bilateral adrenal pheochromocytomas was made. Discharge from the drainage tube persisted and it was difficult to continue conservative treatment. Therefore, laparoscopic bilateral adrenalectomy and transverse colon colostomy were performed. Subsequently, total thyroidectomy and cervical lymph node dissection were performed. At five years of follow up, bilateral lung metastases were observed, but the serum calcitonin level was normal and the patient is under observation.
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