Sinus histiocytosis with massive lymphadenopathy (SHML), also known as Rosai-Dorfman disease (RDD), is an idiopathic histiocytic proliferation affecting lymph nodes. It is typically characterized by painless cervical lymphadenopathy, fever and weight loss. Although extranodal involvement has been reported in diverse sites, intracranial presentation, particularly in the absence of nodal disease ...

A 40-year-old female presented with a 2-year history of asymptomatic nodules on her lower extremity. Symptoms began with a small dark spot on the right thigh, which progressively enlarged. She then developed similar nodules on her right leg and a lesion on her left buttock. On physical exam, her right proximal lateral thigh revealed a 10 cm x 6 cm indurated, pink-brown, heterogeneous plaque wit...

Extranodal lesions may be the sole manifestation of Rosai-Dorfman disease (RDD). Although the head and neck region is one of the most common extranodal sites, laryngeal involvement is very rare. A 44-year-old woman presented with a complaint of progressive dyspnea. She had a three-year history of treatment for asthma and a history of operation for a nasal mass that afflicted her for 15 years an...