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extraskeletal osteosarcoma facial

Yuki Saito, Chie Miyajima, Kazunari Nakao, Takahiro Asakage, Masashi Sugasawa
Osteosarcoma is the most common primary malignant neoplasm of the bone. Rarely, osteosarcomas occur at sites other than the bone, so-called extraskeletal osteosarcoma (ESOS). ESOS is a rare malignancy that accounts for approximately 1% of all tissue sarcomas and present most commonly as a large soft tissue mass in the extremities. The patient was an 18-year-old Japanese man who presented with a stony hard mass in the left submandibular region. Fine-needle aspiration biopsy could not be performed due to the firmness of the mass...
December 2008: Auris, Nasus, Larynx
Jorge Santos-Juanes, C Galache, M Miralles, J R Curto, J Sánchez del Río, J Soto
Extraskeletal osteosarcoma represents approximately 1% of soft tissue sarcomas and approximately 4% of all osteosarcomas. It is therefore much rarer than osteosarcoma arising primarily in bone. Skin as a primary site has seldom been reported. This report describes an extraskeletal osteosarcoma of the skin under a previously electrodessicated actinic keratosis.
November 2004: Journal of the American Academy of Dermatology
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