Health A-Z

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There is usually only one sign that a boy has an undescended testicle. The scrotum appears underdeveloped or smaller on the affected side. In rare cases, the undescended testicle can become twisted (testicular torsion), causing severe groin pain. If this happens, seek medical attention immediately.

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From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.

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