title: Heterotopic ossification of the patellar tendon following intramedullary nailing of the tibia: report on two cases.
abstract: Heterotopic ossification (HO) of the patellar tendon following intramedullary nailing of the tibia for fracture, which has not been previously documented, occurred in 2 of 31 patients reviewed who had adequate follow-up after this procedure. One suffered grade IV HO and the other grade II HO using a modification of the Brooker classification. The patient with grade IV HO had serious disability from pain and decreased range of motion. Risk factors previously suggested were associated with the formation of heterotopic bone in our two patients. These factors included head injury and long-term hypoxemia.
authors.affiliation: Department of Orthopedic Surgery, San Francisco General Hospital, University of California 94110.
authors.forename: R A
authors.initials: RA
authors.lastname: Gosselin
authors.forename: J P
authors.initials: JP
authors.lastname: Belzer
authors.forename: D M
authors.initials: DM
authors.lastname: Contreras
mesh_terms: D000328:Adult; D005594:Fracture Fixation, Intramedullary / Q000009:adverse effects*; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000000981:diagnostic imaging / Q000209:etiology*; D011859:Radiography; D012189:Retrospective Studies; D012307:Risk Factors; D013710:Tendons / Q000000981:diagnostic imaging; D013978:Tibial Fractures / Q000601:surgery*