Tehran University of Medical Sciences Case Reports in Clinical Practice 2538-2683 8 3 2023 12 02 101 103 Shubham Agarwal 3rd year PG resident, Department of Orthopedics, Dr. SN Medical College Kishore Raichandani Senior Professor and Unit Head, Department of Orthopedics, Dr. SN Medical College Hemant Jain Associate Professor, Department of Orthopedics, Dr. SN Medical College Surbhi Raichandani Resident PGY3, Department of Diagnostic Radiology, UAMS, Littlerock, USA 2021 04 09 2021 12 01 Myositis ossificans, in its literal translation, is defined as an inflammatory ossification of muscle and the neighboring soft tissues. A rare case of post-brain injury ossification of the Gluteus maximus muscle extending from the greater trochanter of the femur to the right wing of the iliac bone, leading to extra-articular bony ankylosis of the hip is reported. A 40-year-old male presented to the Outpatient department with a stiff right hip and restriction of its movements. The patient had a history of cerebral hemorrhage 18 months back and subsequently developed stiffness in the right hip since the last 3 months. X-ray and CT scan revealed the extension of an ossified bar extending between the lateral aspect of the right iliac wing above the right acetabulum and upper 1/3 of the anterior lateral aspect of the femur near the greater trochanter, measuring 1003240 mm. The patient was then allowed to go for rehabilitation with appropriate physiotherapy and anti-inflammatory drugs. Extensive hypertrophic ossification can occur at a totally unrelated site as a consequence of cerebral insult/ head injury. https://crcp.tums.ac.ir/index.php/crcp/article/view/510