Diego F. Lemos MD, Presenter: Nothing to Disclose

Carlos Santiago Restrepo MD, Abstract Co-Author: Nothing to Disclose

Julio A. Lemos MD, Abstract Co-Author: Nothing to Disclose

Erick Blaudeau MD, Abstract Co-Author: Nothing to Disclose

Vanessa M. Zayas-Colon MD, Abstract Co-Author: Nothing to Disclose

Carlos R. Gimenez MD, Abstract Co-Author: Nothing to Disclose

1. Discuss the normal imaging appearance of the Kagers fat pad. 2. Describe the wide spectrum of normal and abnormal imaging findings that can be found in the Kager's fat pad. 3. List the list of differential diagnoses of pathologies that can affect the Kager's fat pad.

The Kager's fat pad is a triangular shaped lipomatous structure located in the posterior ankle joint anterior to the Achilles tendon, posterior to the flexor hallucis longus tendon and superior to the calcaneus. Different pathologies arising from this structures and neighboring tissues can affect the fat pad by contiguity. Abnormal conditions from the Achilles tendon include tendinosis, peritendinitis, partial or complete tears, and calcification of the tendon. Thickening of the Achilles tendong causing deformity of the adjacent fat pad can also occur in gout, rheumatoid arthritis, xanthomatosis, and Haglund's disease. Conditions of the calcaneous include fractures, infections, and tumors extending into the Kager's fat pad. Pathology from the flexor hallucis longus tendon include tendinosis, partial or complete tears, neoplasms, and os trigonum. Ganglion cysts, retrocalcaneal bursitis, synovial based pathologies and soft tissue tumors arising from surrounding tissues are also included.

Lemos, D, Restrepo, C, Lemos, J, Blaudeau, E, Zayas-Colon, V, Gimenez, C, Kager's Fat Pad: Anatomy, Pathology, and Imaging Findings.  Radiological Society of North America 2005 Scientific Assembly and Annual Meeting, November 27 - December 2, 2005 ,Chicago IL. http://archive.rsna.org/2005/4417933.html