Deb Prabal, Datta Subramanya G S
Department of Pathology, Armed Forces Medical College, Pune, India.
J Cancer Res Ther. 2009 Oct-Dec;5(4):324-7. doi: 10.4103/0973-1482.59902.
Clear-cell meningioma (CCM) is an uncommon, aggressive variant of meningioma, usually affecting younger females and having predilection for infratentorial locations. We present a rare case of recurrent supratentorial CCM in a 58-year-old male. Ten years back, he had an intra-axial tumor in the left occipital lobe, which was managed by surgical excision and radiotherapy. Currently, the patient presented with sudden severe headache along with speech and vision disturbances. Neuroimaging revealed an extra-axial parietooccipital tumor, with intratumoural bleed. Histopathology of both tumors showed features of CCM, immunopositive for epithelial membrane antigen (EMA) and vimentin. This case illustrates multiple unusual features of a rare variant of meningioma in the form of affection of an adult age group, supratentorial location, recurrence, and intratumoral bleed. It also highlights the importance of incorporating immunohistochemistry in the diagnostic workup, to exclude CCM mimics, each having distinctive biological behavior, and prognostic outcome, and warranting different therapeutic protocols.
透明细胞型脑膜瘤(CCM)是一种罕见的侵袭性脑膜瘤变体,通常影响年轻女性,且好发于幕下部位。我们报告一例58岁男性复发性幕上CCM的罕见病例。十年前,他左侧枕叶有一个轴内肿瘤,通过手术切除和放疗进行了治疗。目前,患者出现突发严重头痛,伴有言语和视力障碍。神经影像学检查显示一个轴外顶枕部肿瘤,伴有瘤内出血。两个肿瘤的组织病理学检查均显示CCM特征,上皮膜抗原(EMA)和波形蛋白免疫阳性。该病例以成年年龄组受累、幕上部位、复发和瘤内出血的形式说明了一种罕见脑膜瘤变体的多个不寻常特征。它还强调了在诊断检查中纳入免疫组织化学的重要性,以排除具有独特生物学行为、预后结果且需要不同治疗方案的CCM模仿物。