Atraumatic Heterotopic Ossification of Iliopsoas Muscle: A Case Report

Bilateral Simultaneous Heterotopic Ossification of the Reflected Head of Rectus Femoris Muscle: A Case Report and Review of the Literature

“…The abductor musculature is the most common site where heterotopic ossification around the hip is observed. The iliopsoas and the quadratus muscles are rarely reported as the involvement sites [ 1 – 3 , 6 – 9 ]. Although it may have been very rarely reported, to our knowledge and review of the literature, we could not find any report about the reflected head of the rectus femoris to be involved as a region of heterotopic ossification.…”

“…It is first described by Patin in 1962 [1]. It is a benign condition; however, its etiology remains largely unknown.…”

“…Involvement of the iliopsoas and quadratus muscles, as in very few cases, has been reported [1, 6–9]. Most previously reported cases have been due to trauma or intramuscular hemorrhage.…”

“…Lamellar bone formation in an abnormal location is defined as heterotopic ossification. It is first described by Patin in 1962 [ 1 ]. It is a benign condition; however, its etiology remains largely unknown.…”

“…Heterotopic ossification commonly occurs around the hip joint, especially after total hip arthroplasties, and most often involves the abductor muscles [ 4 , 5 ]. Involvement of the iliopsoas and quadratus muscles, as in very few cases, has been reported [ 1 , 6 – 9 ]. Most previously reported cases have been due to trauma or intramuscular hemorrhage.…”