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Abstract

BackgroundPapillary meningiomas are rare meningeal tumors and are associated with aggressive clinical behavior as compared with other meningiomas. Because of their rare occurrence, they may pose a diagnostic dilemma to the unwary pathologist. We report a case of papillary meningioma in a 16-year-old boy.Case PresentationA 16-year-old boy presented with complaints of headache, progressively diminishing vision and more recently generalized seizures. MRI revealed a large bifrontal meningioma which showed presence of a predominantly papillary pattern with areas of focal necrosis, frequent mitoses and bone invasion. He underwent radical excision of the tumor and is free from recurrence or metastasis at 15 months follow-up.ConclusionPapillary meningiomas are rare but well recognized variants of meningioma. They need to be differentiated from other intracranial tumors with a papillary pattern. They are malignant, frequently show bone and parenchymatous invasion and have the potential for extracranial metastasis. Their timely recognition could prevent local and distant metastasis and the mortality or morbidity associated with it.

RETRACTED ARTICLE: Cervical type AB thymoma (Mixed) tumour diagnosis in a mynah as a model to study human: clinicohistological, immunohistochemical and cytohistopathological study

“…Based on the WHO and veterinary classification of thymomas [32], this particular case is categorized as mixed type. Overall, the present study confirms previous observations [29,30] that FNA of anterior mediastinal thymic lesions generally yields adequate cellular tissue with distinct cytologic and immunophenotypic features that enables thymoma diagnosis.…”

“…In part, this is because a technically proficient interventional radiologist is needed, epithelial cells may be difficult to recognize in lymphoid rich aspirate smears, and there is inherent sampling error in a tumor that frequently displays heterogeneous histopathology [16,30]. …”

Cerebrospinal fluid cytology of choroid plexus tumor: A report of two cases

“…Very few cases of benign CPP showing metastasis as well as dissemination in the CSF have also been reported. [345678]…”

Choroid plexus tumors: A clinico-pathological and neuro-radiological study of 23 cases

“…While distinct papillary configuration is a hallmark of low-grade CPP, in CPC the papillary features are blurred or can be lost in the sheets of epithelial tumor cells, and this ill-defined growth pattern can make diagnosis challenging. [30] Proliferation indices such as Ki-67/MIB-1 can be useful in the diagnosis of CPC, with reported mean nuclear labelling rates of 1.9% for CPP and 13.8% in CPC. Choroid plexus carcinoma is classified as a WHO grade III tumor.…”