title: [Changes in the ultrastructure of sperm flagella in severe idiopathic asthenospermia patients: observation of 22 cases].
abstract: OBJECTIVE
  To observe the ultrastructural changes of sperm flagella in patients with severe idiopathic asthenospermia.
  
  
  METHODS
  Using the transmission electron microscope, we examined the ultrastructure of sperm flagella from 22 patients with severe idiopathic asthenospermia.
  
  
  RESULTS
  Ultrastructural anomalies were found in all the 22 patients, 6 with partial or complete absence of internal and external dynamic arms in dedicative of primary ciliary dyskinesia, 1 with hyperplasia, hypertrophy and disordered organization of the fibrous sheath usually referred to as dysplasia of the fibrous sheath, and the other 15 with non-specific flagellar anomalies.
  
  
  CONCLUSIONS
  Examination of the ultrastructure of sperm flagella in severe idiopathic asthenospermia patients can help to distinguish congenital from acquired flagellar structural anomalies and give valuable guidance in the treatment.
authors: Department of Urology, Taizhou First People's Hospital, Taizhou, Zhejiang 318020, China. linqian_2004@163.com
authors: Qian
authors: Q
authors: Lin
authors: Department of Andrology, People's Hospital of Peking University, Beijing 100044, China.
authors: Wen-Jun
authors: WJ
authors: Bai
authors: Laboratory of Electron Microscopy, People's Hospital of Peking University, Beijing 100044, China.
authors: Shu-Ying
authors: SY
authors: Zheng
authors: Department of Andrology, Daxing Hospital Affiliated to Capital Medical University, Beijing 102600, China.
authors: Chong
authors: C
authors: Geng
authors: Department of Andrology, People's Hospital of Peking University, Beijing 100044, China.
authors: Xiao-Feng
authors: XF
authors: Wang
mesh_terms: D000328:Adult; D053627:Asthenozoospermia / Q000473:pathology*; D006801:Humans; D008297:Male; D013082:Sperm Tail / Q000648:ultrastructure*