Swimming pool granuloma

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Aquarium granuloma; Fish tank granuloma

The main symptom is a reddish bump (papule) that slowly grows into a purplish nodule.

The elbows, fingers, and back of the hands are the most common body parts affected. The knees and legs are less commonly affected.

The nodules may break down and leave an open sore. Sometimes, they may spread up the limb, but most often they stay a simple skin sore.

Tests to diagnose swimming pool granuloma include:

• PPD tuberculin skin test (to check for tuberculosis infection, which may look similar)
• Skin biopsy and culture

Review Date: 02/05/2011
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org).

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