Rosai Dorfman Disease
May 7, 2022
Lessons From the Friday Unknowns
Histologic sections show a nodule involving fibroadipose tissue. The nodule is composed of many lymphocytes and histiocytes and has some features suggestive of lymph node. However, there is no capsule or subcapsular sinus and therefore we believe this process is extranodal and mimicking a lymph node.