RESUMEN
Four children aged 3 months to 14 years presenting with multiple mucosal neuromatosis (MMN) and having medullary carcinoma of the thyroid (MCT) along with various other associated features are reported. All patient had screening test for pheochromocytoma. Thyroid gland and Neuromatous growths were subjected to histological examination for confirmatory diagnosis. All patients were subjected to total thyroidectomy with removal of regional lymph nodes. They were evaluated periodically for a variable post-operative period at 2 to 4 years. The first degree relatives were also screened. One of the four children had left sided pheochromocytoma which responded satisfactorily to the adrenalectomy. Prophylactic total thyroidectomy with annual/biannual critical review to detect recurrence is advocated. It is recommended that first degree relatives of familial MMN Syndrome should also be subjected to annual screening in view of its autosomonal dominant transmission.