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Androgen insensitivity syndrome: an immunohistochemical, ultrastructural, and morphometric study
J Regadera1, F Martínez-García, R Paniagua
1Department of Morphology, School of Medicine, Autonomous University, Madrid, Spain.
Archives of Pathology & Laboratory Medicine
|March 23, 1999
Summary
Testicular lesions in androgen insensitivity syndrome begin during gestation and worsen by puberty. These changes include Sertoli-cell-only tubules and hyperplasia, particularly in adult patients with this condition.
Area of Science:
- Reproductive Endocrinology
- Pathology
- Developmental Biology
Background:
- Androgen insensitivity syndrome (AIS) is a disorder affecting sexual development.
- Testicular pathology in AIS is not fully understood, particularly the progression of lesions from infancy to adulthood.
Purpose of the Study:
- To characterize the morphometric, immunohistochemical, and ultrastructural testicular lesions in prepubertal and adult patients with AIS.
- To compare these findings with normal testicular tissue.
Main Methods:
- Testicular biopsies from AIS patients (prepubertal and adult) and controls were analyzed.
- Immunohistochemistry was used to detect vimentin, smooth muscle actin, and collagen IV.
- Quantification of seminiferous tubules and interstitium was performed.
Main Results:
- Adult AIS testes showed nodular and diffuse lesions with Sertoli-cell-only tubules and hyperplastic Leydig cells.
- Two Sertoli cell types were identified: immature vimentin-positive and nearly mature.
- Prepubertal AIS testes exhibited diffuse lesions with Sertoli cell hyperplasia, reduced germ cells, and discontinuous collagen IV.
- Adult nodular lesions had thin lamina propria with few actin-positive peritubular cells.
Conclusions:
- Testicular lesions in AIS likely originate from primary alterations during gestation.
- Lesions progress and become more pronounced at puberty, with fully developed nodular patterns (adenomas).