Meningeal Solitary Fibrous Tumor: A Cytological Report With Emphasis on the Usefulness of Immunocytochemical Analysis for STAT6

IF 1 4区 医学 Q4 MEDICAL LABORATORY TECHNOLOGY
Hiroyuki Okanishi, Mitsuaki Ishida, Naoto Kohno, Isako Kataoka, Mari Tomiuka, Mayumi Uragami, Shizuka Ono, Chihiro Deguchi, Reika Takeda, Yoshitaka Kurisu, Yoshinobu Hirose
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Abstract

Solitary fibrous tumors (SFTs) are rare neoplasms characterized by spindle neoplastic cell proliferation within collagenous stroma and prominent dilated vasculature. They present a wide histopathological spectrum, ranging from hypocellular lesions with a rich collagenous stroma to hypercellular lesions with scant stroma. Meningeal SFTs are usually hypercellular, and their cytological features remain poorly characterized. This brief report presents a cytological description of a meningeal SFT with immunocytochemical analysis for signal transducer and activator of transcription 6 (STAT6). A 55-year-old Japanese male, with a history of surgical resection of SFT 11 years earlier, was discovered to have a recurrent tumor in the left cerebellar tentorium. An intraoperative touch smear of the tumor revealed loosely aggregated hypercellular clusters and scattered round-to-oval spindle cells in a clear background, with large nuclei and hyperchromasia. Although minimal stromal components were observed, no dilated vascular structures were identified. Immunocytochemistry showed diffuse positive immunoreactivity for STAT6, confirming the diagnosis of meningeal SFT. Histopathological and immunohistochemical analyses confirmed recurrent meningeal SFT. The cytological features of meningeal SFT differ from those of pleural SFT in terms of minimal collagenous stroma and the presence of nuclear atypia. STAT6 is a specific marker for SFT, and immunocytochemical staining is useful for its diagnosis.

Abstract Image

脑膜孤立性纤维性肿瘤:细胞学报告,强调免疫细胞化学分析对STAT6的有用性。
孤立性纤维性肿瘤(SFTs)是一种罕见的肿瘤,其特征是胶原间质内的梭形肿瘤细胞增殖和血管明显扩张。它们表现出广泛的组织病理谱,从含有丰富胶原基质的低细胞病变到含有少量基质的高细胞病变。脑膜SFTs通常是多细胞性的,其细胞学特征仍然不清楚。这篇简短的报告介绍了脑膜SFT的细胞学描述和信号换能器和转录激活因子6 (STAT6)的免疫细胞化学分析。一名55岁的日本男性,11年前手术切除了SFT,被发现在左小脑幕有复发肿瘤。术中肿瘤的触摸涂片在清晰背景下显示松散聚集的高细胞团和分散的圆形到椭圆形的梭形细胞,细胞核大,染色深。虽然观察到最小的基质成分,但没有发现扩张的血管结构。免疫细胞化学显示STAT6弥漫性阳性免疫反应,证实脑膜SFT的诊断。组织病理学和免疫组织化学分析证实复发性脑膜SFT。脑膜SFT的细胞学特征与胸膜SFT的不同之处在于胶原基质极少和核异型性的存在。STAT6是SFT的特异性标志物,免疫细胞化学染色可用于SFT的诊断。
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来源期刊
Diagnostic Cytopathology
Diagnostic Cytopathology 医学-病理学
CiteScore
2.60
自引率
7.70%
发文量
163
审稿时长
3-6 weeks
期刊介绍: Diagnostic Cytopathology is intended to provide a forum for the exchange of information in the field of cytopathology, with special emphasis on the practical, clinical aspects of the discipline. The editors invite original scientific articles, as well as special review articles, feature articles, and letters to the editor, from laboratory professionals engaged in the practice of cytopathology. Manuscripts are accepted for publication on the basis of scientific merit, practical significance, and suitability for publication in a journal dedicated to this discipline. Original articles can be considered only with the understanding that they have never been published before and that they have not been submitted for simultaneous review to another publication.
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