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Updated: Jan 8, 2026

Transillumination-Assisted Dissection of Specific Stages of the Mouse Seminiferous Epithelial Cycle for Downstream Immunostaining Analyses
Published on: October 7, 2020
[Monstrous epithelium in the seminal vesicles and epididymis]
Abstract:
Monstrous epithelial cells in seminal vesicles, causing diagnostical embarrassment , occur sometimes in fine needle-aspirates of prostate gland. Their frequency was studied in a group of autopsies (6 boys of the age from 6 hours to 10 years, mean age 3,1 years and 34 adult men of the age from 42 to 91 years, mean age 68,4 years). Monstrous cells did not occur in boys but were found in 73,5% of adults. There were similar epithelial monstrosities in epididymis simultaneously. Most of them were found in efferent ductuli (in 76,4%). Big monstrous epithelial cells with conspicuous irregular hyperchromatic nuclei are to be distinguished cautiously from the neoplastic ones. They may be caused by ageing and hormonal influence above all (in analogy to Arias-Stella phenomenon in women).
Insights
Monstrous epithelial cells in seminal vesicles are common in adult men but absent in boys. These cells, found in prostate aspirates and epididymis, are linked to aging and hormonal changes, not cancer.
Area of Science:
- Uropathology
- Andrology
- Cytopathology
Context:
- Monstrous epithelial cells in seminal vesicles can mimic neoplastic cells in prostate gland fine needle aspirates.
- These findings are often diagnostically challenging.
Purpose:
- To investigate the frequency and characteristics of monstrous epithelial cells in seminal vesicles and epididymis in autopsy samples.
- To differentiate these cells from neoplastic lesions.
Summary:
- Autopsy study of 6 boys and 34 adult men revealed monstrous epithelial cells in 73.5% of adults, but none in boys.
- Similar cells were found in the epididymis, particularly in efferent ductuli (76.4%).
- These large cells with irregular hyperchromatic nuclei are attributed to aging and hormonal influences, analogous to the Arias-Stella phenomenon.
Impact:
- Provides crucial information for pathologists to correctly interpret prostate aspirates, distinguishing benign cellular changes from malignancy.
- Highlights the prevalence of age-related epithelial changes in the male reproductive system.
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