Inflammation of the perimysium. ... (05 Mar 2000) ... 
Type: Term Pronunciation: mī′ō-fī′brō-sī′tis Definitions: 1. Inflammation of the perimysium.
myofibrositis Inflammation of the perimysium or the connective tissue sheath which surrounds a muscle, and sends partitions inwards between the bundles of muscular fibers.