PDF(Pubmed)
Abstract：
Renal cell carcinoma (RCC) is the predominant solid lesion found in the kidney. Extra-renal RCC is a rare entity. We present the case of a 75-year-old male with an incidentally discovered mass in the right iliac fossa. The patient underwent active surveillance because a percutaneous biopsy revealed a mesenchymal neoplastic lesion of benign biological behavior. As the mass had high growth rates, a decision for open surgical exploration and excision was made. The pathology results indicated clear cell renal carcinoma, and negative results on 18F-FDG whole-body positron emission tomography-computed tomography (PET/CT) established the diagnosis of extra-renal clear cell RCC. Similar types of neoplasms are extremely rare and are estimated to have developed primarily in mesodermal embryonic remnants. Clinicians should be aware of this rare entity as its diagnosis is challenging and is based on pathology.
摘要：
肾细胞癌（RCC）是肾脏中发现的主要实体病变。肾外RCC是一种罕见的实体。我们介绍了一名75岁的男性，在右髂窝偶然发现了肿块。患者接受了积极的监测，因为经皮活检显示良性生物学行为的间充质肿瘤病变。由于群众的增长率很高，决定进行开放性手术探查和切除。病理提示肾透明细胞癌，18F-FDG全身正电子发射断层扫描-计算机断层扫描（PET/CT）的阴性结果确定了肾外透明细胞RCC的诊断。类似类型的肿瘤极为罕见，估计主要在中胚层胚胎残留物中发展。临床医生应该意识到这种罕见的实体，因为它的诊断具有挑战性，并且基于病理学。
