Rod-like tubular structures in the cytoplasm of histiocytes in "histiocytosis x".
D003593:Cytoplasm; D005260:Female; D006644:Histiocytes / Q000166:cytology*; D006801:Humans; D007223:Infant; D008206:Lymphatic Diseases / Q000473:pathology*; D008297:Male; D008853:Microscopy; D008854:Microscopy, Electron