A

Normal anatomy of Kager's fat pad. Lateral radiograph (A) and illustration (B) of ankle show triangular radiolucency (A) and structure of Kager's fat pad. On radiograph, anterior border (arrowheads, A) is posterior aspect of flexor hallucis longus muscle and tendon, posterior border (asterisk, A) is Achilles tendon, and floor (arrow, A) is superior surface of calcaneus.


http://www.ajronline.org/cgi/content/full/182/1/147