Lunate osteochondroma: a case report

We report a case of osteochondroma of the lunate. A 16-year-old boy had a 6-year history of irritable snapping of the right wrist associated with numbness of the ipsilateral middle finger. At surgery we found that the median nerve became caught on the lunate osteochondroma while the wrist was extended and slipped over it when the wrist was flexed rapidly, thereby causing a snapping phenomenon. The symptoms disappeared completely after the protruding lesion was excised. Several cases of solitary carpal osteochondroma have been reported previously.     

Para-articular chondroma and osteochondroma of the infrapatellar fat pad: a report of three cases

We report three cases of para-articular chondroma and osteochondroma in the region of infrapatellar fat pad. All three lesions were resected and examined histologically. Two of them were primarily cartilaginous with a lobular pattern internally, and one uniformly osseous with peripheral cartilage. We conclude that these lesions are not the same. The former should be designated para-articular chondroma after Jaffe and the latter, osteochondroma.     

胸椎椎板骨软骨瘤1例

骨软骨瘤很少发生于脊柱,2003年11月本院收治1例胸椎椎板骨软骨瘤患者,现报告如下：     

Para-articular osteochondroma of the infrapatellar fat pad

We report a rare case of para-articular osteochondroma of the infrapatellar fat pad. A 56-year-old woman presented with a 2-year history of mild anterior knee pain and a hard mass around the right knee. Plain radiographs and computed tomography revealed trabeculated ossification within the infrapatellar fat pad. We performed surgery through an open approach. The mass was located within the infrapatellar fat pad and did not communicate with the joint space or patellar tendon. The gross appearance of the tumor resembled an osteochondroma. On microscopic examination, it was composed of cartilaginous tissue with areas of multifocal endochondral ossification surrounded by fibrous connective tissue. There was no synovial tissue. We diagnosed it as a para-articular osteochondroma of the infrapatellar fat pad. In the literature, this entity is rare. Differential diagnosis includes a variety of bone-forming lesions including malignancy. Definitive diagnosis is made by combining clinical, radiologic, and histologic findings.     

Paraarticular osteochondroma of talocalcaneal joint: a case report

An 18-year-old male presented with a swelling in the posterior aspect of the right ankle since 2 years and recent onset of pain on walking. Physical examination and Roentgenography revealed a distinct osseous lesion in the posterior aspect of the talocalcaneal joint. During surgical excision, the lesion was separate from the talus and the calcaneum and appeared to originate from the capsule of the talocalcaneal joint. Histology revealed a benign osteochondroma. The talocalcaneal joint is a very rare site for the origin of osteochondroma. From literature review, it appears that this is the first reported case of a paraarticular osteochondroma arising from the talocalcaneal joint.     

Extraskeletal osteochondroma of the thigh: a case report

A case of histopathologically proven extraskeletal osteochondroma of the thigh is presented along with its radiographic, CT and MRI findings. This is the first such case reported, to the best of our knowledge. The diagnosis of extraskeletal osteochondroma should be considered when a discrete ossified mass is localised in the soft tissue.     

Solitary osteochondroma of the trapezium: case report

Osteochondroma of the carpal is rare. We found only 1 case of osteochondroma of the trapezium in the literature. We present a case of a 52-year-old woman with an osteochondroma of the left trapezium and trapeziometacarpal arthritis.     

坐骨的骨软骨瘤误诊为骨折1例

正患者,男,14岁,因"左侧坐骨骨折内固定术后20余天"于2015年10月25日入院。患者20余天前跳远摔倒,当即感左臀部疼痛难忍,就诊于外院诊断为"左侧坐骨骨折",给予内固定治疗,术后左臀部疼痛未减轻反而出现左下肢疼痛及麻木症状,遂来我院就诊。入院查体:左侧臀部可见一个长约10 cm的手术愈合瘢痕,触之有一个约鸭蛋大小包块,活动度差,压痛。左臀部及左下肢后侧存在麻木感,左下     

Large para-articular osteochondroma of the knee joint: a case report

A unique case of large intra-articular osteochondroma of the knee of a 15-year duration is presented along with a review of the literature. The tumor may have remained asymptomatic for such a long period because of its slow growth and stretch elongation of the quadriceps mechanism.     

Vertebral osteochondroma causing spinal cord compression: case report

A case of spinal cord compression secondary to an osteochondroma of the vertebral body of T-4 is reported. Computed tomography aided in the display of the lesion and the planning of its resection.     

Bilateral osteochondroma of the scaphoid causing scapholunate dissociation: a case report

A case with bilateral scaphoid osteochondroma (exostosis) with scapholunate dissociation. In both the cases a proximal row carpectomy was performed with excellent outcome.     

L4椎管内骨软骨瘤致神经根受压1例报告

患者，男，62岁。2002年3月初开始，无明显外伤史，逐渐出现腰痛伴一侧腿痛4年余，时轻时重，经对症治疗有好转而没有引起重视。近半年腰腿痛症状加重，伴典型间歇性跛行，站立和行走时症状加重，而下蹲或坐下休息和卧床时减轻，疼痛从左侧臀部放射至同侧小腿外侧与足背。门诊以腰椎管狭窄收入院。检查：腰部无畸形，L4棘突与棘突左侧压痛，腰部过伸试验阳性。     

Extraskeletal osteochondroma in the nape of the neck: a case report

Extraskeletal osteochondroma in the nape of the neck is rare and its pathological diagnosis is based on radiological and histopathological examination. It is vital that such a diagnosis be considered when a discrete, ossified mass is localised in soft tissues, even at atypical sites. Differential diagnoses include myositis ossificans, a lipomatous lesion, a pseudomalignant osseous tumour, an ossifying fibromyxoid tumour, an extraskeletal chondroma with endochondral ossification, synovial (osteo) chondromatosis, tumoural calcinosis, a synovial sarcoma, and an extraskeletal osteosarcoma. Clinical awareness of this benign entity is important as no malignant transformation or metastasis has been reported. Marginal excision with histopathological identification is the treatment of choice.