Urology Department, Central Lisbon Hospital Center, Lisbon.
Arch Ital Urol Androl. 2020 Oct 2;92(3). doi: 10.4081/aiua.2020.3.273.
Myxomas are rare tumours that can be found in many anatomical locations. There are only 17 cases of renal involvement documented. Our case is an 85 year-old man followed in our consultation with recurrent hematuria after a transurethral resection of a bladder tumour. Evaluation with CT showed a solid lesion with 23 x 18 mm partially obliterating the left inferior calyx. The patient underwent a left nephroureterectomy. Microscopic examination showed a mass within renal parenchyma adjacent to the renal pelvis composed of plump mildly atypical spindle cells distributed in a copious myxoid matrix. Immunohistochemical staining for Vimentine, Pankeratin (AE1/AE3-), CD34, CD31 and smooth muscle actin were negative. With these histopathological and immunohistochemical findings, the case was diagnosed as renal myxoma.
黏液瘤是一种罕见的肿瘤，可以在许多解剖部位发现。只有 17 例肾脏受累的病例有记录。我们的病例是一名 85 岁男性，在我院随诊，曾因膀胱肿瘤行经尿道膀胱肿瘤切除术，术后反复出现血尿。CT 检查显示左肾下盏有一个实性病变，大小为 23x18mm，部分阻塞左肾下盏。患者行左肾输尿管切除术。显微镜下检查显示肾实质内靠近肾盂的肿块，由分布在丰富黏液样基质中的丰满、轻度非典型梭形细胞组成。免疫组化染色显示波形蛋白、AE1/AE3-角蛋白、CD34、CD31 和平滑肌肌动蛋白均为阴性。根据这些组织病理学和免疫组化结果，诊断为肾黏液瘤。
