Gizli tiroit papiller karsinomundan parafarenjeal alana metastatik yayılım: Olgu sunumu

Tiroit karsinomlarından parafaranjeal alana yayılım çok nadirdir. İlerleyici yutma zorluğu ve boyun sağ üst kıs- mında flifllik flikayeti ile baflvuran 40 yaflında erkek has- tada, sağ tonsili ve orofarenjeal duvarı mediale iten 4x3 cm boyutlarında submulozal kitle palpe edildi. Bilgisayar- lı tomografide, sağ parafarenjeal bofllukta, 5x4x2.5 cm boyutlarında, hipodens, etrafı kalsifiye kitle saptandı. Kit- le transservikal yolla tümüyle çıkarıldı. Frozen-section in- celemesinde benign lezyon tanısı konmasına rağmen, çıkarılan örneğin histopatolojik değerlendirmesinde pa- piller tiroid karsinom metastazı belirlendi. Hastaya total tiroidektomi ve iki taraflı selektif boyun diseksiyonu uygu- landı. Ameliyat sonrası değerlendirmede tiroit bezinin sağ üst kutbunda 0.8x0.8 cm boyutlarında papiller mikro- karsinom saptandı. Hastanın üç yıllık izlemi sırasında lo- korejyonel ya da uzak metastazla karflılaflılmadı.Parafa- renjeal kitlelerin ayırıcı tanısına metastatik tiroit karsi- nomları da alınmalıdır. Tiroit bezi ile parafarenjeal lenf nodları arasında olduğu bildirilen lenfatik yol bu metas- tazların nedeni olabilir.

Metastatic spread of occult papillary carcinoma of the thyroid to the parapharyngeal space: a case report

Metastasis from thyroid carcinomas to the parapharyngeal space is very rare. A forty-year-old male presented with Pro­ gressive dysphagia and enlargement in the right upper neck.Examination showed medial displacement of the right palatine tonsil and the lateral oropharyngeal wall. A firm, submucosal mass measuring 4x3 cm was palpated. Computed tomogra- phy revealed a hypodense and heterogenic parapharyngeal mass with a calcified border. The mass was totally removed by a transcervical approach. Although frozen-section diagnosis was a benign lesion, histopathologic evaluation showed metas­ tasis of papillary thyroid carcinoma to the parapharyngeal lymph nodes. Total thyroidectomy and bilateral selective neck dissection were performed, after which the tumor turned out to be papillary microcarcinoma 0.8x0.8 cm in the right upper lobe of the thyroid gland. No locoregional recurrences or dis- tant metastasis were observed during a three-year follow-up.The differential diagnosis of parapharyngeal masses should include metastatic thyroid carcinomas, for which a lymphatic route has been suggested betvveen the thyroid gland and the parapharyngeal lymph nodes.

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