Birbeck granule

== English == === Etymology === Named after Michael Stanley Clive Birbeck, who described it in 1961. === Noun === Birbeck granule (plural Birbeck granules) (anatomy, ultrastructure) A rod or tennis racket-shaped cytoplasmic organelle solely found in Langerhans cells and hence a marker for Langerhans cell histiocytoses. ==== Synonyms ==== Birbeck body characteristic granule (originally)