Arthroscopic treatment of an intra-articular hemangioma in the posterior compartment of the knee.

We report the case of a 37-year-old patient presenting with knee pain and recurrent effusion without instability due to an intra-articular hemangioma in the posterior compartment of the knee. MRI showed features suggesting a diagnosis of hemangioma. Arthroscopic excision of the tumor was performed and the diagnosis was confirmed histologically. There was no recurrence after 5 years of follow-up.

Isolated anterior interosseous nerve deficit due to a false aneurysm of the humeral artery: an unusual complication of penetrating arm injury. Case report and literature review.

Anterior interosseous nerve (AIN) injuries account for only 1% of all the nerve injuries at the upper limb. We report the case of a 22-year-old male who sustained a penetrating injury to the arm. No neurological deficit was found at the initial evaluation. However, 6 weeks later, he had a motor deficit confined to the territory of the AIN with weakness of the flexor pollicis longus and flexor digitorum longus to the index. He also reported paraesthesia. Tinel's test was positive over the pinpoint wound in the arm, where a painful swelling was felt. Electroneurophysiological testing indicated a deficit of the AIN. Surgical exploration identified a thrombosed false aneurysm of the humeral artery responsible for compression of the median nerve. One month later, the patient had achieved a full recovery. Immediate routine exploration of deep penetrating wounds, although mandatory, may fail to detect any lesions. Close monitoring must be provided subsequently, as gradual nerve compression can result in delayed neurological deficits.

Early correction of paediatric malunited distal metaphyseal radius fractures using percutaneous callus osteoclasis ("Calloclasis").

INTRODUCTION: Closed reduction of secondary displacements of distal metaphyseal radius fractures is an easy procedure only when performed within the first ten to fifteen days post-trauma, prior to the occurrence of malunion. When a hard bony callus prevents proper reduction, an open osteotomy is generally advocated. HYPOTHESIS: We suggest the use of a less invasive technique which aims at correcting early malunion when closed reduction is made impossible: the percutaneous callus osteoclasis. MATERIALS AND METHODS: Callus osteoclasis consists in a series of multiple bone-drilling in a postage stamp pattern performed under image intensifier using a large diameter pin, at a distance from the growth plate. Once the bone has been weakened, reduction is obtained by using the pin as an intrafocal lever. The pin is then pushed through the opposite cortex to ensure postero-lateral stabilization. RESULTS: Twenty-one patients were managed using this technique and reported good results with no complications. DISCUSSION: This technique offers a low aggressive management of malunions and may be performed within two to six weeks after trauma. LEVEL OF EVIDENCE: Level IV. Multicenter retrospective study.