<prompt> Friebergs disease involveTibial tuberosityCalcaneal tuberosity2nd metatarsal5th metarasal  <response>: condition characterized by infarction and fracture of the metatarsal head. Most often seen in 2nd metatarsal MT head, paicularly the dorsal aspect4th and 5th MT rarely affected Bony nucleus of epiphysis is affected in osteochondritis Ref: Maheshwari and Mhaskar 6e pg 318. 