101/279. A case report of osteochondroma of the frontotemporosphenoidal suture. Osteochondroma, also known as osteocartilaginous exostosis, is the most frequent benign bone tumour of the skeletal system. Despite its preference for long bones (tibia and femur), osteochondroma may occur in some short bones developing endochondral ossification. Seventy-five percent of the patients present only with a single lesion, whereas 25% have multiple lesions; this last clinical condition, defined as osteochondromatosis (disorder of autosomal dominant inheritance) shows a high risk of malignant transformation (about 11%). In the craniofacial area this tumour is very rare. The sites of predilection are the coronoid process and mandibular condyle, even though osteochondromas arising from the base of the skull, maxillary sinus and zygomatic arch have been previously described. However, an osteochondroma originating from the frontotemporosphenoidal suture has not been reported before in the literature. We present a unique case of osteochondroma of the frontotemporosphenoidal suture. Moreover, the relevant international literature has been reviewed and all diagnostic and surgical matters have been discussed. ( info) |
102/279. Radiologic demonstration of temporal development of bizarre parosteal osteochondromatous proliferation. We report a case of bizarre parosteal osteochondromatous proliferation (BPOP) in which radiologic examinations showed temporal development of BPOP following a traumatic event. This evidence supports the theory that BPOP is caused by trauma. ( info) |
103/279. headache due to an osteochondroma of the axis. We reported a case of a 42-year-old man with a 3-year history of headache due to a spinal osteochondroma. Repeated neurological evaluation, including EEG studies and CT of the cerebrum, revealed no pathology. More recently the patient presented with persistent headache and a slight limitation of neck motion. MRI studies of the cerebrum including the cervical spine showed a high cervical extradural tumor. Additional CT angiography showed a bony tumor suspected of being a spinal osteochondroma. An en bloc resection of the tumor was performed; histological evaluation confirmed the diagnosis. Immediately after intervention, all symptoms disappeared. In most patients with a spinal osteochondroma, the lesion causes no symptoms, or symptoms are aspecific. Therefore, there is often a significant delay between initial complaints and the diagnosis, as in the current case. ( info) |
104/279. Solitary osteochondroma arising from the thoracic facet joint--case report. A 15-year-old male presented with pain in the back and paresthesia and weakness of both lower limbs progressing for 6 months. magnetic resonance imaging revealed a mass lesion occupying the spinal canal at the T-10 to T-11 levels, which had severely compressed the cord. At surgery, a firm and cartilaginous tumor originating from the facet joint was radically excised. The patient showed rapid neurological recovery following the surgery. Histological examination revealed that the lesion was osteochondroma. Such lesions are extremely rare in the lower thoracic spine and osteochondroma arising from the thoracic facet joint is unique. ( info) |
105/279. Extraarticular synovial chondromatosis: review of epidemiology, imaging studies, microscopy and pathogenesis, with a report of an additional case in a child. A rare benign condition of uncertain etiology and pathogenesis, Synovial Chondromatosis (SC) is most often seen intraarticularly in adults but only a handful of cases have been reported extraarticularly in children. Symptoms and physical signs consist of pain, swelling, and osteoarthritic changes related to a mass effect. Here we discuss the case of a 9-year-old boy with documented SC of the knee and critically review the epidemiology, Clinical Presentation, Gross anatomy and Microscopic Histopathologic Features as well as the role of Imaging Studies in diagnosis. In addition, this paper reviews Current Pathogenetic Concepts including the infrequent but distinct possibility of malignant transformation. ( info) |
106/279. Solitary osteochondroma of the mandibular symphysis. Osteochondroma is a benign neoplasm that usually develops in long bones and very rarely occurs in craniofacial bones. Nearly all reported mandibular osteochondromas have arisen in the condyle and the coronoid process, and occurrence in other locations is extremely rare. We describe a case of osteochondroma arising from the inferior border of the mandibular symphysis. ( info) |
107/279. Transformation of solitary osteochondroma calcaneum to chondrosarcoma--a case report. Solitary osteochondroma of calcaneum is an uncommon benign tumor. Its malignant transformation to chondrosarcoma is rarely encountered. Pain and recent enlargement are clinical manifestations of this complication. Magnetic resonance imaging is a valuable tool to detect this change. ( info) |
108/279. Trevor disease of the spine. Case report. The authors report the case of a 15-year-old boy who presented with left shoulder pain and paresthesia of the left hand. Imaging studies revealed an osseous lesion compressing the C-8 nerve root. The patient underwent tumor resection followed by instrumentation-augmented fusion. Histological findings were consistent with osteochondroma. The tumor most likely originated from the articular cartilage between the first rib and T-1 or between C-7 and T-1. The correct diagnosis, therefore, was dysplasia epiphysialis hemimelica (DEH), also known as Trevor disease. To the authors' knowledge, this is the first report of DEH involving the spine. ( info) |
109/279. A massive osteochondroma of the mandibular condyle. A case is presented of a massive osteochondroma of the mandibular condyle leading to marked facial asymmetry, painful mastication, disturbed occlusion and impaired hearing on the affected side. The diagnosis was confirmed by radiological and histological examination. A tentative treatment plan including surgery on both jaws was proposed but had to be modified because of the patient's reluctance to undergo any surgery on the maxilla. ( info) |
110/279. popliteal artery entrapment syndrome: an unusual presentation of a fibular osteochondroma. This report describes a fibular neck osteochondroma presenting as popliteal artery entrapment syndrome. ( info) |