title: Ultrastructural study of focal epithelial hyperplasia.
abstract: Biopsy material from two young Israeli patients with focal epithelial hyperplasia revealed acanthosis, papillomatosis, and the presence of many epithelial cells with a clear cytoplasm in the basale and stratum spinosum. Many of the inclusions seen with the electron microscope had the morphologic appearance of lysosomes, but definite identification must await cytochemical evidence.
mesh_terms: D000293:Adolescent; D000328:Adult; D001485:Basement Membrane / Q000648:ultrastructure; D002462:Cell Membrane / Q000648:ultrastructure; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D003593:Cytoplasm / Q000648:ultrastructure; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D003896:Desmosomes / Q000648:ultrastructure; D004721:Endoplasmic Reticulum / Q000648:ultrastructure; D004848:Epithelium / Q000648:ultrastructure; D005260:Female; D006056:Golgi Apparatus / Q000648:ultrastructure; D006801:Humans; D006965:Hyperplasia / Q000473:pathology; D002479:Inclusion Bodies / Q000648:ultrastructure; D007557:Israel; D007642:Keratosis / Q000473:pathology; D008854:Microscopy, Electron; D008928:Mitochondria / Q000648:ultrastructure; D009059:Mouth Diseases / Q000473:pathology*; D009061:Mouth Mucosa / Q000648:ultrastructure*