Metatarsal stress fractures secondary to soft-tissue osteochondroma in the foot: Case report and literature review

Extraskeletal osteochondroma on a cat´s elbow

“…They are thought to be hereditary, having an autosomal dominant inherited form (Gunay et al 2010). Soft tissue or extraskeletal osteochondromas are another form of osteochondroma in humans and they are thought to originate from the differentiation of mesenchymal cells of the soft tissues (Malhotra et al 2011). Few cases have been reported arising in the hands, wrists, feet, knee, thigh, buttock and neck and they presented as gradually enlarging masses within the soft tissues that were painful if they impinged on adjacent structures (Malhotra et al 2011).…”

“…It is thought that they are caused by herniation of the growth plate and histologically they consist of a well-defined osseous mass with a trabecular pattern of bone formation and a cartilaginous hyaline cap (Malhotra et al 2011). They are thought to be hereditary, having an autosomal dominant inherited form (Gunay et al 2010).…”

“…In humans, osteochondromas are one of the most common benign bone tumours arising from bone (Malhotra et al 2011). It is thought that they are caused by herniation of the growth plate and histologically they consist of a well-defined osseous mass with a trabecular pattern of bone formation and a cartilaginous hyaline cap (Malhotra et al 2011).…”

Extraskeletal Osteochondroma of the Medial Arch of the Foot

“…Frequently, the mass can be easily enucleated 3 and early recognition of this entity by clinical and radiological evaluation will help avoid unnecessary extensive surgery. 4 The indications of the surgical excision of the mass in this case were the presence of local pain and preventing the occurrence of arthrosis in any articulating or adjacent joints. 2 In summary, extraskeletal osteochondromas are benign, slow-growing, and often painless neoplasms.…”

“…2 The pathogenesis of soft tissue osteochondromas remains unclear. The following mechanisms 2,4,5,7 The behavior of extraskeletal osteochondroma is poorly characterized but limited data suggests that they have a benign fashion and local recurrence is rare. 2,4,6,7 There have been no report of malignant changes or metastasis.…”