Mesenchymal chondrosarcoma originated in the primitive mesenchymal tissue .It usually devel-ops in the short bones such as hand ,foot and body bone ,while extremeIy rare in the orbit .We report a case of mesenchymal chondrosarcoma of the orbit which is confirmed by pathology .%间叶软骨肉瘤是起源于原始间叶组织的恶性肿瘤。多发生于手、足等短骨及躯干骨,发生于眶内的极为罕见。本文报道一例经病理证实的眶内间叶软骨肉瘤。
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