Myositis ossificans circumscripta (MOC) is a benign condition of non-neoplastic heterotopic bone formation in the muscle or soft tissue. Trauma plays a role in the development of MOC, thus, non-traumatic MOC is very rare. Although MOC may occur anywhere in the body, the lesions are localized predominantly in the high-risk sites of injury, such as the thigh, buttock, and elbow. MOC can easily be mistaken for osteomyelitis or a malignant tumor, specifically osteosarcoma or soft-tissue sarcoma. We report a rare case of non-traumatic myositis ossificans circumscripta of thigh which appear clinically and radiologically as a malignant neoplasm. Despite its rarity, MOC should be contemplated in the differential diagnosis of malignant tumors.

Amputation appears to be an effective treatment method in squamous carcinoma secondary to chronic osteomyelitis.

Bilateral anterior dislocation of the shoulders is very rare. A 20-year-old man presented with bilateral anterior shoulder dislocation as a result of a diving incident. He complained of pain and restriction of movement in both shoulders with abducted and externally rotated arms. Radiographs revealed that the shoulders were dislocated. The patient was treated with closed reduction and was able to resume swimming 3 months later. To our knowledge, this is the first bilateral anterior dislocation of the shoulders during a backstroke swimming competition that was caused by this mechanism of injury. The rarity of this lesion and its uncommon mechanism prompted us to relate this observation.

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Isolated distal radioulnar joint (DRUJ) dislocation is a rare injury. Reports of isolated DRUJ luxations, volar or dorsal, are often case reports and rarely a series of cases. We present a case of an isolated acute dorsal dislocation of the distal radioulnar joint in a 25-year-old man. The patient underwent closed reduction and a transcutaneous radioulnar pinning was done followed by cast immobilization in neutral rotation during 6 weeks. After six months follow -up, the functional result was satisfactory, patient experienced no pain and had no restrictions in work or sports-related activities.