中年男性,头痛月余。 (缩略图,点击图片链接看原图)中年男性,头痛月余。 (缩略图,点击图片链接看原图)中年男性,头痛月余。 (缩略图,点击图片链接看原图)中年男性,头痛月余。 (缩略图,点击图片链接看原图)中年男性,头痛月余。 (缩略图,点击图片链接看原图)中年男性,头痛月余。 (缩略图,点击图片链接看原图)读片示:右侧大脑半球可见大面积长T1,长T2信号影,增强后未见强化,边沿不清,中线结构左移.考虑诊断1,淋巴瘤 多发于深部脑白质2'胶质瘤 3脑梗塞 望提供神经科检查病史:中年男性,头痛月余。影像表现:脑内(颞叶主为、枕叶、直回、脑干、基底节区等)弥漫性分布长T2异常信号影,T1WI低信号不明显,病变以右侧明显,右侧脑沟变窄,增强后病灶无明显强化,右侧脑室受压变窄,中线结构左移。考虑:感染性病变,病毒性脑炎可能诊断与鉴别诊断:本例特点是弥漫性病变,无明显强化,占位效应明显,T1WI信号改变不明显,符合感染性病变1、实体性肿瘤如胶质瘤、淋巴瘤、转移瘤等,因为增强未见明显肿瘤瘤体,因此暂不考虑2、梗塞:病程不符,范围太广,不符合血管供应区域,T1WI降低不明显,增强无明显脑回样强化个人以为挺典型的。没有发热病史,脑脊液正常。胶质瘤病病史:中年男性,头痛月余。无发热。脑脊液正常影像学表现:右额、顶、颞、岛叶及基底节区体积增大并可见大片等、略长T1、长T2信号病灶影。增强扫描病灶强化不明显。同侧侧脑室受压移位、变窄。中线结构向对侧偏移。印象:右侧大脑半球脑实质病灶符合胶质瘤病。讨论:大脑胶质瘤病病理上表现为肿瘤性胶质细胞弥漫性生长,多侵犯两个脑叶以上或累积两侧大脑半球,可同时累及胼胝体、基底节、脑干、小脑等,病变区脑体积增大、变硬,但脑基本轮廓仍保持。以白质为主,可同时累及脑深部结构。MRI表现为长T1长T2信号,少有坏死、囊变及出血,病灶常无明显增强。肿瘤组织类型以低级别星形细胞瘤常见,生物学行为具有恶性倾向,预后不佳。病灶有明显的占位效应(右侧侧裂池、脑沟变窄,右侧侧脑室受压、移位、变窄,中线移位),影像特点为稍长或等T1稍长T2信号,无灶周水肿,未见强化。病变范围较广--右侧大脑半球均受累,右侧基底节区、丘脑累及,病变边界不清,呈弥漫性生长。结合患者年龄偏大--为中年男性,首先考虑弥漫性星形细胞瘤。其次大脑胶质瘤病,各年龄层次均可见,相对年轻人多发。病灶有明显的占位效应(右侧侧裂池、脑沟变窄,右侧侧脑室受压、移位、变窄,中线移位),影像特点为稍长或等T1稍长T2信号,无灶周水肿,未见强化。病变范围较广--右侧大脑半球均受累,右侧基底节区、丘脑累及,病变边界不清,呈弥漫性生长。结合患者年龄偏大--为中年男性,首先考虑弥漫性星形细胞瘤。其次大脑胶质瘤病,各年龄层次均可见,相对年轻人多发。 支持考虑脑梗塞。理由:没有明显瘤体,右侧额颞顶枕叶、基底节区见大片状长T1长T2信号,周围有水肿,见明显占位效应。脑沟变浅,脑回增宽。增强扫描见脑回样强化。左侧丘脑区见类似信号影。建议MRA检查。胶质瘤病!低级别星形细胞瘤不出外。右基底节区生殖细胞瘤 可能大脑梗塞不考虑 因为大面积脑梗塞多为大脑动脉栓塞所致,而血管流空存在病灶累及颞顶叶,而以颞顶叶为明显,范围广泛,T1稍低信号,T2高信号,有占位效应,增强后无明显强化;临床发病时间稍长,无肢体乏力症状,(脑梗塞可以排除)。考虑:病毒性脑炎可能性大。鉴别诊断:脑胶质瘤病。表现像炎症,但占位效应太明显,也可能是胶质瘤,但没见过弥漫性胶质瘤病,没有把握。感觉像脑炎多些。1.影像表现:右颞叶 、 右额叶直回、右基底节区等可见弥漫性分布长T2异常信号影,T1WI低信号不明显,边界不清, 右侧脑沟变窄,增强后病灶无明显强化, 中线结构左移。左侧脑实质病变较轻。2.中年男性,头痛月余。没有发热病史,脑脊液正常。影像诊断:符合大脑胶质瘤病3.鉴别诊断:(1)病毒性脑炎特别是单疱脑炎,分布范围停象,但该病人没有强化,脑脊液正常,无发热,可除外。 (2)大面积脑梗死:分布范围及临床病史不象。病史:中年男性,头痛月余。无发热。脑脊液正常MRI表现:右额、顶、颞、岛叶及基底节区可见大片等、略长T1、长T2信号病灶影。脑回增宽,脑沟变浅。增强扫描病灶强化不明显。同侧侧脑室受压移位、变窄。中线结构向对侧偏移。诊断:脑内异常信号,考虑为星形细胞瘤可能性较大(I~II级)支持胶质瘤病胶质瘤yxgys wrote:病史:中年男性,头痛月余。无发热。脑脊液正常影像学表现:右额、顶、颞、岛叶及基底节区体积增大并可见大片等、略长T1、长T2信号病灶影。增强扫描病灶强化不明显。同侧侧脑室受压移位、变窄。中线结构向对侧偏移。印象:右侧大脑半球脑实质病灶符合胶质瘤病。讨论:大脑胶质瘤病病理上表现为肿瘤性胶质细胞弥漫性生长,多侵犯两个脑叶以上或累积两侧大脑半球,可同时累及胼胝体、基底节、脑干、小脑等,病变区脑体积增大、变硬,但脑基本轮廓仍保持。以白质为主,可同时累及脑深部结构。MRI表现为长T1长T2信号,少有坏死、囊变及出血,病灶常无明显增强。肿瘤组织类型以低级别星形细胞瘤常见,生物学行为具有恶性倾向,预后不佳。肿瘤在何处?acmilan_000 wrote:肿瘤在何处?影像表现和讨论说得很清楚了,就那样。很典型的。影像表现:脑内(颞叶主为、枕叶、直回、脑干、基底节区等)弥漫性分布长T2异常信号影,T1WI低信号不明显,病变以右侧明显,右侧脑沟变窄,增强后病灶无明显强化,右侧脑室受压变窄,中线结构左移。考虑:脑炎.考虑诊断:大脑胶质瘤病右侧顶叶、颞叶、枕叶、右侧直回、眶回、右侧放射冠、基底节区、及丘脑可见片状长T1长T2 信号影。边界不清。局部脑沟裂显示不清。周围可见沿脑白质纤维束走形的指状水肿,左侧基底节区也有受累。病灶占位效应较轻,中线结构轻度左移。增强后病变为见明显强化。考虑为:大脑胶质瘤病。大脑胶质瘤病文献上的关于胶质瘤病的叙述>Gliomatosis cerebri is a rare primary brain tumor characterized by diffuse infiltration of the brain with neoplastic glial cells that typically involve multiple brain areas. The morphology of tumor cells is diverse, taking on the appearance of astrocytes, oligodendrocytes, or Schwann cells with variable mitotic activity. It represents an extreme form of diffusely infiltrating glioma [1,2]. It is difficult to distinguish gliomatosis cerebri from highly infiltrate anaplastic astrocytoma or GBM. This patient had a biopsy that confirmed the diagnosis of gliomatosis cerebri. It can occur at any age but is usually found in the third and fourth decades of life [3]. It may affect any part of the brain or even the spinal cord, optic nerve and compact white matter. Clinical manifestations are non-specific, and include headache, seizures, visual disturbances, corticospinal tract deficits, lethargy, and dementia [4]. Before the advent of MRI imaging, diagnosis was generally not established until autopsy. On MRI, it typically appears as a diffuse, poorly circumscribed, infiltrating non-enhancing lesion that is hyperintense on T2-weighted images and expands the cerebral white matter. The prognosis for gliomatosis cerebri is generally poor, with a median survival time of only 12 months. Surgery is not practical considering the extent of the disease, standard chemotherapy (nitrosourea) has been unsuccessful, and although brain irradiation can stabilize or improve neurologic function in some patients, its impact on survival has yet to be proven [5].References: 1. Nevin S. Gliomatosis cerebri. Brain 1938;61:170-191. 2. Mineura K, Sasjima T, Kowada M et al: Innovative approach in the diagnosis of gliomatosis cerebri using carbon-11-L-methionine position emission tomography, J Nuc Med 1991;32:726-728. 3. Koslow SA, Claassen D, Hirsch WL, Jungreis CA: Gliomatosis cerebr: a case report with autopsy correlation. Neuroradiol 1992;34:331-333. 4. Kim DG, Yang HJ, Park IA, et al. Gliomatosis cerebri: clinical features, treatment, and prognosis. Acta Neurochir 1998; 140: 755–762. 5. Cozad SC, Townsend P, Morantz RA, Jenny AB, Kepes JJ, Smalley SR. Gliomatosis cerebri: results with radiation therapy. Cancer 1996; 78: 1789–1793. screen.width-333)this.width=screen.width-333" width=568 height=235 title="Click to view full 未命名.jpg (568 X 235)" border=0 align=absmiddle>收藏,学习了!考虑星形细胞瘤