Highlights Most injuries in school occur during sport. Avulsion fractures of the tibial tubercle are uncommon school sports injuries. X-ray is the key to diagnosis. Then CT scan is needed to evaluate the fracture extension to the articular joint. Many cases are misdiagnosed and progress to recurvatum deformity especially in open physis individuals after neglected tibial tuberosity fractures. These injuries cause significant disruption to school and sport, but fortunately, complications are rare and functional recovery is usually complete.

IntroductionLimb subcutaneous emphysema secondary to a Munchausen syndrome represents a rare and severe entity because it involves the functional prognosis of the limb and vital prognosis of the patient.Case presentationWe report the case of an 18-year-old Moroccan woman patient who presented to our hospital with a subcutaneous emphysema of the shoulder girdle and the right arm, caused by our patient. Treatment was aggressive, with a wide surgical debridement, parenteral antibiotic therapy and hyperbaric oxygen therapy. The results have been favorable.ConclusionsThe correlation of anamnestic data and clinical and para-clinical exams were essential for the diagnosis of Munchausen syndrome in this case. In this regard, we report a rare case of subcutaneous limb emphysema secondary to Munchausen syndrome.

BackgroundAn acetabular location of osteoid osteoma is rare and represents less than 1 % of cases. The purpose of this clinical case report is to highlight the unusual location of osteoid osteoma and the technical difficulty of its removal.Case presentationWe report a case of a 17-year-old Moroccan Arab boy who presented with pain in his right hip with lameness. The diagnosis of osteoid osteoma was made by imagery and confirmed by histological examination. The treatment consisted of a complete percutaneous resection scanno-guided of the nidus. The evolution was marked by complete healing with total and definitive disappearance of symptoms after 1 year.ConclusionsOsteoid osteoma of the acetabular roof is rare. The diagnosis is now easy because of the evolution of imaging. Treatment is exclusively surgical. Complete resection guarantees the absence of recurrence. The difficulty of the surgical procedure is due to the deep localization of the osteoid osteoma and because it is endosseous, it is also dangerous due to anatomical relationships and the small size of the osteoid osteoma.

The synovial sheath cell tumor (TCGGS) represents the localized form of hemo pigmented villonodular synovitis, which remains a rare tumor in our practice. It occurs mainly in young adults with a predominance of women. It mainly affects the fingers of the hand, its location at the level of the thenar compartment is very rare. Clinically, it has a local expression, which can be summarized as a swelling characterized by slow growth and which may be accompanied by signs of compression at a late stage. An anatomo-pathological examination remains the key element in diagnosis and prognosis. Treatment is based on surgery with complete tumor removal. We report the case of TCGGS of the thenar compartment with compression of the median nerve.

Glomus tumors of the hand are benign vascular tumors, which develop at the expense of the neuro-myo-arterial glomus. They represent about 1% -5% of all hand tumors. Their diagnosis is frequently delayed by the absence of specific signs, its confirmation is based on anatomopathological examination. Their treatment is based on complete surgical excision and restitution of the nail apparatus, the only guarantees of a good evolution without recurrence. We report the case of a recurrence of a glomus tumor of the ring finger in a woman where the pains reappeared 6 months after the first intervention.

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Chondrosarcoma is a malignant tumor occupying the 2nd position in terms of frequency, all ages combined, after osteosarcoma [1]. Epidemiological data extracted from cancer registries in Europe indicate an annual incidence of ~0.1/100,000 inhabitants [2]. Mesenchymal chondrosarcoma of bone is a rare high-grade variant of chondrosarcoma (2-13%), which usually has an extra-skeletal (30-40%) or central intramedullary location (15-30%).

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