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.

Ewing's sarcoma usually arises from skeletal bone, but rarely may have an extraskeletal origin. However, Ewing's sarcoma that originates around the spinal column, especially, the intradural extramedullary type is extremely rare. We report a rare case of primary intraspinal extraskeletal Ewing's sarcoma.

Extraskeletal mesenchymal chondrosarcoma (EMCS) is a rare malignant soft tissue tumor of chondroprogenitor cell origin. Originally, it was restricted to the bone only but that no longer case. Recent literature reports 20–33% these tumors occur at extraskeletal sites. We report one such case, in which involved anterior abdominal wall muscles and also had large intra- mass covered part peritoneal...

Extraskeletal Ewing's Sarcoma/Primitive Neuroectodermal Tumor presenting as a breast mass is uncommon. It may pose a diagnostic challenge. In order to increase awareness and identify potential diagnostic pitfalls, we report a 24 year-old woman extraosseous Extraskeletal Ewing's Sarcoma/Primitive Neuroectodermal Tumor arising in the breast.

Osteochondromas, occurring usually in the metaphyses of long bones, are among the most frequent benign musculoskeletal neoplasms and both their sporadic and hereditary variants have been studied extensively. Extraskeletal osteochondromas, however, are much less common. They have been shown to arise near joints or synovial spaces of feet, hands, or bursae. Herein, we present a very rare case of ...

This report presents an extremely rare case of extraskeletal myxoid chondrosarcoma (EMC) arising from the clavicular periosteum. To the best of our knowledge, this may be the first detailed report of its clinicopathological findings. The patient was a 48-year-old man. Plain radiography and CT did not demonstrate any osteolytic lesion or periosteal reaction in the right clavicle. However, MRI sh...

Extraskeletal osteosarcoma (ESOS) is a rare soft tissue sarcoma, typically characterized by a bone-producing neoplasm. Low-grade extraskeletal osteosarcoma (LGESOS) is an extremely rare soft tissue tumor, and patients with LGESOS tend to have a better prognosis. Here, we reported a case of LGESOS of the mediastinum with lung metastasis, and describe its clinical, pathological and radiological f...