An erythematous cutaneous plaque on the breast with no signs of infection requires a skin biopsy to rule out dermal extension of an underlying mammary adenocarcinoma, primary skin tumour (e.g. angiosarcoma or malignant lymphoma) (1), or inflammatory lymphoedema of the breast (2). It can more rarely reveal location on the skin of systemic disease. Rosai-Dorfman disease (RDD), also known as sinus...

We report a 48-year-old man who presents with a 20-month history of left parotid enlargement despite treatment with antibiotics and steroids. He presented with a non-painful palpable mass in his left parotid without facial weakness or otologic symptoms. Fine needle aspiration was inconclusive, and an attempted excisional biopsy was aborted due to involvement of the facial nerve and suspicion of...

OBJECTIVES Programmed death-1 (PD-1) is physiologically expressed by germinal center (GC)-associated helper T cells. It has been proposed that an increase in PD-1+ cells outside GC could indicate pattern I angioimmunoblastic T-cell lymphoma (AITL). METHODS We studied the distribution of PD-1+ cells in reactive lymphadenopathies (LA), including HIV-associated and dermatopathic LA (n = 5, each)...

Background. Rosai-Dorfman disease (RDD) is a benign histiocytic proliferative disorder of unknown etiology. This rare condition commonly causes massive cervical lymphadenopathy. Intracranial RDD without any nodal involvement is extremely rare. Case Report. A young Bangladeshi male complained of bilateral complete blindness with left sided deafness for about three years. There was no lymphadenop...