To the Editor: A 36‐year‐old female patient was admitted to Peking Union Medical College Hospital complaining of 6 years of headache. Magnetic resonance imaging (MRI) showed an intrasellar lesion with homogeneous hyperintense on T1‐weighted images and T2‐weighted images and inhomogeneous contrast enhancement by the gadolinium administration [Figure 1a and 1b]. Rathke’s cleft cyst was initially ...

Progressive nodular histiocytosis is a rare non-Langerhans histiocytosis. It tends to occur in adult with progressive course that differentiates from other groups of xanthogranuloma. The clinical presentation is characteristic and disfiguring of the face is not uncommon. Extracutaneous involvement and metabolic association were reported in a few cases. Treatment is unsatisfactory and follow-up ...

granuloma annulare is self-limiting cutaneous condition of unknown etiology, causing necrobiotic dermal and subcutaneous papules. a number of conditions have been described in association with granuloma annulare , including lymphoma, anemia, intestinal bleeding, seronegative arthralgia, vasculitis and autoimmune thyroiditis. this manuscript, as the first report of this combination in iran, desc...

Xanthogranulomas of the choroids plexus (XG) are benign tumours of debatable etiology which become rarely symptomatic. Only few cases have been studied with MRI. A new case of xanthogranuloma of the third ventricle showing unusual features in the CT and MRI studies in a 47-year-old man with a 2-month history of gait and urinary disturbances and cognitive impairment is reported. The literature c...