Unusual Uptake of [ I] in a Tenosynovial Giant Cell Tumour Relapse in a Patient with Differentiated Thyroid Cancer/Diferansiye Tiroid Kanserli Bir Hastada Tenosinovyal Dev Hucreli Tumor Nuksunde Olagandisi [[.sup.131]I] Tutulumu

A 77-year-old woman with follicular thyroid cancer underwent total thyroidectomy and subsequent Iodine-131 remnant ablation. She had a history of a wide tenosynovial giant cell tumor (TGCT) of the right wrist and hand that had been resected thirteen years ago. Post-therapeutic scintigraphy and single photon emission computed tomography showed mild uptake on the distal right forearm, wrist and hand. Magnetic resonance imaging and posterior histopathology confirmed a relapse of TGCT. No radioiodine adverse effects were reported after a one-year follow-up. As far as we know, this report is the first in the literature to a TGCT visualized on post-therapy radioiodine scan. Keywords: Giant cell tumor of tendon sheath, thyroid neoplasms, scintigraphy, magnetic resonance imaging Foliküler tiroid kanserli 77 yasinda bir kadina total tiroidektomi ve ardindan Iyot-131 remnant ablasyonu uygulandi. On üç yil önce rezeke edilmis sag el bilegi ve elde genis tenosinovyal dev hücreli tümör (TGCT) öyküsü vardi. Tedavi sonrasi sintigrafi ve tek foton emisyon tomografisi distal sag önkol, el bilegi ve elde hafif tutulum gösterdi. manyetik rezonans görüntüleme ve posterior histopatoloji, TGCT'nin relapsini dogruladi. Bir yillik takipten sonra hiçbir radyoiyodin yan etkisi bildirilmemistir. Bildigimiz kadariyla bu rapor, tedavi sonrasi radyoiyot taramasinda görüntülenen bir TGCT'nin literatürdeki ilk raporudur. Anahtar kelimeler: Tendon kilifinin dev hücreli tümörü, tiroid neoplazmalari, sintigrafi, manyetik rezonans görüntüleme