Rosai Dorfman Disease Involving Thyroid- An Fine Needle Aspiration Diagnosis

Abstract

RDD (Rosai Dorfman Disease) also called as sinus histiocytosis with massive lymphadenopathy is a rare, self-limiting disorder. Extra nodal RDD involving the thyroid gland is very rare and only seven cases have been reported till date in the literature and ours is the second case to be diagnosed by FNAC. RDD shows female predominance. We present a case of RDD involving the thyroid in a 24 year female who presented with midline neck swelling. CT scan neck showed a large lobulated mass involving the right lobe of thyroid gland along with enlarged multiple right level II lymph nodes. FNAC from thyroid and cervical lymph node revealed histiocytes showing emperopolesis,lymphocytes and plasma cells. Hence we conclude that FNAC useful diagnostic procedure for RDD involving thyroid, as it can avoid thyroidectomy.