title: Morphogenesis of 'decapitated' spermatozoa in a man.
abstract: Study of biopsy specimens of a man with 'decapitated' spermatozoa indicated that the malformation was due to an overproduction of a membraneous vesicles system by the Golgi complex in the region between the centrioles and acrosome during the spermatid stage. The tails were almost normal in structure and 50% were motile in the ejaculate although few followed a straight trajectory.
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D009024:Morphogenesis; D013077:Sperm Head / Q000648:ultrastructure; D013081:Sperm Motility; D013082:Sperm Tail / Q000648:ultrastructure; D013087:Spermatids / Q000648:ultrastructure; D013094:Spermatozoa / Q000002:abnormalities* / Q000254:growth & development