Dancing megasperm

Last revised by Ashesh Ishwarlal Ranchod on 27 Dec 2023

Citation, DOI, disclosures and article data

Citation:

Thoo S, Ranchod A, Baba Y, et al. Dancing megasperm. Reference article, Radiopaedia.org (Accessed on 25 Apr 2024) https://doi.org/10.53347/rID-71865

DOI:

https://doi.org/10.53347/rID-71865

Permalink:

https://radiopaedia.org/articles/71865

rID:

71865

Article created:

1 Nov 2019, Sophie Thoo

Disclosures:

At the time the article was created Sophie Thoo had no recorded disclosures.

View Sophie Thoo's current disclosures

Last revised:

27 Dec 2023, Ashesh Ishwarlal Ranchod ◉

Disclosures:

At the time the article was last revised Ashesh Ishwarlal Ranchod had no financial relationships to ineligible companies to disclose.

View Ashesh Ishwarlal Ranchod's current disclosures

Revisions:

9 times, by 5 contributors - see full revision history and disclosures

Systems:

Urogenital

Synonyms:

Dancing megasperm sign

Dancing megasperm is the ultrasound finding of continuously oscillating/mobile tiny echogenic foci within dilated tubules of the epididymis. This is seen in post-vasectomy patients and others with obstruction of the spermatic cord and is thought to represent clumps/ clusters of trapped spermatozoa which oscillate due to the turbulence created during ultrasound interrogation of the scrotum ^2,3.

Note: a single spermatozoon can only be identified microscopically³.