PDF(Pubmed)
Abstract：
Extraskeletal chondromas are small nodular cartilaginous lesions not attached to bone or the periosteum. They are rare tumors commonly occurring in the hands and feet. The objective of the present study is to describe a case of extraskeletal intramuscular chondroma (EIC) in the left knee and the diagnostic challenges faced by us. A 25-year-old female patient presented with slow-growing swelling in the left knee for 2 years. Clinically, the swelling was arising from the quadriceps muscle. We considered possibilities such as rhabdomyoma, neurofibroma, and intramuscular lipoma. Imaging studies suggested a benign fatty tumor. She was treated by excision. Microscopy was consistent with EIC without recurrence. A rare entity, clinically, EIC can mimic other benign soft-tissue tumors. Histopathology exams can provide a definitive diagnosis. The excision of the tumor is curative.
摘要：
骨外软骨瘤是不附着于骨骼或骨膜的小结节性软骨病变。它们是罕见的肿瘤，通常发生在手和脚。本研究的目的是描述左膝骨外肌内软骨瘤（EIC）的病例以及我们面临的诊断挑战。一名25岁的女性患者表现为左膝肿胀缓慢增长2年。临床上,肿胀是由股四头肌引起的。我们考虑了横纹肌瘤等可能性，神经纤维瘤,和肌内脂肪瘤.影像学检查提示良性脂肪瘤。她接受了切除治疗。显微镜检查与EIC一致，无复发。一个罕见的实体，临床上,EIC可以模拟其他良性软组织肿瘤。组织病理学检查可以提供明确的诊断。切除肿瘤是治愈性的。
