[Castleman disease: a clinical case report].

Castleman's disease is an enigmatic lymphoid disease of unknown etiology and has different clinical manifestations. The authors present a case of a young woman with cervical localization of Castleman disease, asymptomatic. The disease was misdiagnosed and was treated for five years as thyroiditis, diagnosis confirmed by ultrasonography, scintigraphy and cytology. The particular size of the neoformation and its constant growth leaded the authors to the surgical treatment. The thyroid was normal both macroscopically and with biopsy. The neoformation was 10 cm of diameter and covered the left side of the thyroid.