Rosai-Dorfman disease of the larynx.

We present a case of an 81-year-old man with a history of worsening dysphonia of six months duration. A year before a sinus histiocytosis with massive lymphadenopathy (Rosai-Dorfman disease) was diagnosed on a submandibular lymph node biopsy. On presentation the patient showed a mass in the left subglottic area with a modest reduction in the airway space. The patient underwent an endoscopic CO2 laser excision of the mass, without post-operative complications. Histopathological examination and electron microscope images confirmed the previous diagnosis of Rosai-Dorfman disease. The clinical and pathological features of this entity are discussed.