A case of a medullary thyroid carcinoma developing in the course of ulcerative colitis

Öz

Thyroid carcinoma accounts for 1% of all malignancies, and medullary thyroid carcinoma accounts for 5-10% of the thyroid carcinomas. It can be sporadic or familial. The sporadic forms are especially diagnosed late in the course of the disease. Thyroid carcinoma usually presents with symptoms and signs related to local invasion to adjacent structures and hormone secretion, such as flushing and diarrhea. Extraintestinal manifestations are well-known clinical features of ulcerative colitis. They develop prior to or during the course of the disease. Medullary thyroid carcinoma has not been reported in patients with ulcerative colitis to date, and only one case of papillary thyroid carcinoma has been reported. Because medullary thyroid carcinoma can present with diarrhea, it is difficult to make a diagnosis in patients with ulcerative colitis, which also manifests with diarrhea. Therefore, all diarrheal attacks should not be attributed to ulcerative colitis in these patients; instead, other possibilities should be evaluated. We report a case of medullary thyroid carcinoma developing in the course of ulcerative colitis.

Anahtar Kelimeler

• Medullary thyroid carcinoma, diarrhea, ulcerative colitis

Ülseratif kolit takibinde tiroid medüller karsinoma gelişen bir vaka, olgu sunumu

Öz

Tiroid karsinomu tüm kanserler içinde %1 oranında görülürken medüller tiroid karsinomu, tiroid kanserlerinin yaklaşık %5-10'unu oluşturur. Sporadik ya da ailevi olabilir. Özellikle sporadik formlar daha geç tanı almaktadır. Klinik semptomlar genellikle lokal invazyon ve hormon sekresyonuna bağlı ciltte kızarma ve diyare gibi semptomlardır. Ekstraintestinal bulgular ülseratif kolitin iyi bilinen klinik özelliklerindendir. Bunlar tanı öncesi veya klinik seyir sırasında ortaya çıkabilir. Literatürde medüller tiroid karsinomu ile ülseratif kolit birlikteliği şimdiye kadar gösterilmemiş olup sadece papiller tiroid kanseri ile eşlik eden bir olgu sunumu vardır. Ayrıca medüller tiroid karsinoması'nın ishal şikayeti ile beraber gitmesi, ülseratif kolit kliniği nedeni ile hastaya tanısal yaklaşımı zorlaştırmaktadır. Ülseratif kolit tanısı mevcut hastalarımızda her ishal atağını mevcut tanıya bağlamayıp diğer nedenler de dışlanmalıdır. Bu yazıda ülseratif kolit seyrinde gelişen bir medüller karsinomu vakasını sunduk.

Anahtar Kelimeler

• Medüller tiroid karsinoma, ishal, ülseratif kolit

Kaynakça

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