Birbeck’s granules in the cytoplasm are seen in:
Birbeck granules are rod Shaped/Tennis-racket shaped cytoplasmic organelles with a central linear density and a striated appearance.
They are diagnostic microscopic feature in Langerhans cell histiocytosis (Histiocytosis X)
Langerhans cells
Mast cells
Myelocytes
Thrombocytes