Prabhakar Gautham, Dev Ameesh, Ghazanfari Amlashi Fatemeh, Rajani Rajiv
Orthopaedic Surgery, UT Health San Antonio, San Antonio, USA.
Pathology, UT Health San Antonio, San Antonio, USA.
Cureus. 2021 Aug 13;13(8):e17163. doi: 10.7759/cureus.17163. eCollection 2021 Aug.
Periosteal chondromas (PCs) are rare tumors composed of hyaline cartilage that are typically present in long bones and tubular bones of the hand. These lesions are easily mistaken for other, more common tumors. This study reports a case of PC located in the posterior pelvis of a 24-year-old female. The patient initially presented with a four-month history of pelvic pain with a presumptive diagnosis of endometriosis. However, when an MRI was performed, a 6.0 cm x 5.6 cm x 4.5 cm mass was found along the right posterior ilium extending to the ipsilateral sacroiliac joint. The patient underwent intralesional excision and curettage of the mass. Histologic analysis of the excised lesion revealed a proliferation of chondrocytes and abundant hyaline cartilage without chondroblasts, further suggesting the diagnosis of PC. The current study highlights the unusual location of this rare tumor and alerts the physician of the clinical presentation and differential diagnosis.
骨膜软骨瘤（PCs）是一种罕见的由透明软骨构成的肿瘤，通常出现在长骨和手部的管状骨中。这些病变很容易被误诊为其他更常见的肿瘤。本研究报告了一例位于一名24岁女性骨盆后部的骨膜软骨瘤病例。患者最初出现了4个月的盆腔疼痛病史，初步诊断为子宫内膜异位症。然而，在进行磁共振成像（MRI）检查时，发现沿右髂后延伸至同侧骶髂关节处有一个6.0厘米×5.6厘米×4.5厘米的肿块。患者接受了肿块的病灶内切除和刮除术。对切除病变的组织学分析显示软骨细胞增生且有丰富的透明软骨，但无成软骨细胞，进一步提示骨膜软骨瘤的诊断。本研究强调了这种罕见肿瘤的不寻常位置，并提醒医生注意其临床表现和鉴别诊断。
