enthesitis

[ĕn′thĭ-sītĭs]
n.
  1. Traumatic disease occurring at the point of attachment of skeletal muscles to bone, where recurring stress causes inflammation and often fibrosis and calcification.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.