Primary ectopic meningioma of the palatine tonsil – a case report

Kaur, Amandeep; Shetty, Subhash Chandra; Prasad, Devi; Nirmala, V

doi:10.1017/s0022215100136795

Cited by 13 publications

(2 citation statements)

References 6 publications

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“…All three cases displayed histologic features characteristic of FDC sarcoma, consisting of "sheets of ovoid to spindle-shaped cells with fine nuclear chromatin and ill-defined cell membranes forming nests and many distinct whorls" (38). Photographs of these tumors show a background of mature lymphocytes scattered throughout the neoplastic cells, as well as perivascular cuffing of lymphocytes.…”

Section: Discussionmentioning

confidence: 92%

Extranodal Follicular Dendritic Cell Sarcoma of the Head and Neck Region: Three New Cases, with a Review of the Literature

et al. 2002

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Extranodal follicular dendritic cell (FDC) sarcoma of the head and neck region is uncommon, with 16 well-documented cases previously reported (four in the tonsil, four in the pharynx, two in the palate, five in the soft tissue, and one in the thyroid). We here report an additional three cases of extranodal FDC sarcoma in the tonsil (two cases) and pharynx (one case). In these new cases, the neoplastic cells were arranged in diffuse, fascicular, and vaguely whorled growth patterns. A background lymphocytic infiltrate was sprinkled throughout the neoplasms, with focal prominent perivascular cuffing. Scattered multinucleated giant cells were present. Immunohistochemically, tumor cells were strongly and diffusely positive for follicular dendritic cell markers CD21 and CD35. Tumor cells were diffusely positive for fascin and negative for leukocyte common antigen, S-100 protein, cytokeratin, and Epstein-Barr virus (EBV) latent membrane protein-1 (EBV-LMP). EBV was also not detected in the tumor cells by in situ hybridization for EBV-encoded RNAs. FDC sarcomas are probably an underrecognized neoplasm, especially when they occur in extranodal sites in the head and neck region. Two of the three new cases we report were initially misdiagnosed, and five cases of extranodal FDC sarcoma in the head and neck region reported in the recent literature were initially misdiagnosed. Our aim is to complement the current understanding of this neoplasm and alert pathologists to this rare entity in this region to avoid misdiagnosis. Recognition of extranodal FDC sarcoma requires a high index of suspicion, but this tumor has numerous distinctive histological features that should bring the neoplasm into the differential diagnosis. Confirmatory immunohistochemical staining with follicular dendritic cell markers such as CD21 and/or CD35 is essential for the diagnosis. Correct characterization of this neoplasm is imperative given its potential for recurrence and metastasis.

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Section: Discussionmentioning

confidence: 92%

Extranodal Follicular Dendritic Cell Sarcoma of the Head and Neck Region: Three New Cases, with a Review of the Literature

et al. 2002

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“…However, meningiomas have been reported outside the CNS as secondary/metastatic lesions 4 or as primary extracranial meningiomas (ectopic meningiomas). Extracranial meningiomas are rare tumours reported in various anatomical sites, including the neck, 1,3,5–11 scalp, 12 retroperitoneum, 13 lung, 14 palatine tonsil, 15 paranasal and maxillary sinus, 16–18 subgaleal space, 19 nasopharynx, 20 foot, 21 fallopian tube, 8 peripheral nerves, 14,18 parotid region, 3 mouth 2 and geniculate ganglion 14 …”

Section: Discussionmentioning

confidence: 99%

Fine needle aspiration cytology of ectopic meningioma presenting as a neck mass: a case report and a review of the literature

et al. 2011

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Treatment recommendations for primary extradural meningiomas

Mattox

Hughes

Oleson

et al. 2010

Cancer

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Highly reflective, surface‐metalized, flexible polyimide films were prepared by the incorporation of a soluble silver‐ion complex, (hexafluoroacetylacetonato)silver(I) (AgHFA), into dimethylacetamide solutions of poly(amic acid) prepared from 2,2‐bis(3,4‐dicarboxyphenyl)hexafluoropropane dianhydride and 2,2‐bis[4‐(4‐aminophenoxy)phenyl]hexafluoropropane. The thermal curing of solution‐cast silver(I)–poly(amic acid) films to 300°C led to cycloimidization of the amic acid with concomitant silver(I) reduction and the formation of a reflective, air‐side‐silvered surface at very low (2 wt % and 0.3 vol %) silver concentrations. The reflective surface evolved only when the cure temperature reached about 275°C, although X‐ray diffraction showed metallic silver in the hybrid film by 200°C. After a maximum specular reflectivity greater than 80% was achieved for the 2 wt % silver film, the specular reflectivity diminished sharply with further heating at a constant temperature of 300°C. Incorporating the AgHFA complex into the soluble, fully imidized form of poly{(1,3‐dihydro‐1,3‐dioxo‐2H‐isoindole‐2,5‐diyl)[2,2,2‐trifluoro‐1‐(trifluoromethyl)ethylidene](1,3‐dihydro‐1,3‐dioxo‐2H‐isoindole‐5,2‐diyl)‐1,4‐phenyleneoxy‐1,4‐phenylene[2,2,2‐trifluoro‐1‐(trifluoromethyl)ethylidene]‐1,4‐phenyleneoxy‐1,4‐phenylene} gave films that were 25% less reflective than those beginning with poly(amic acid). Though highly reflective, the films were not electrically conductive. The metalized membranes were thermally stable and maintained mechanical properties similar to those of the parent polyimide. Transmission electron microscopy revealed an air‐side, near‐surface layer of silver that was about 40 nm thick; the interior of the film had well‐dispersed metal particles with diameters mostly less than 2 nm. The near‐surface silver layer maintained its integrity because of physical entrapment of the metal nanoparticles beneath a thin layer of polyimide; that is, the practical adhesion of the metal layer was good. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 2409–2418, 2007

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Primary ectopic meningioma of the palatine tonsil – a case report

Cited by 13 publications

References 6 publications

Extranodal Follicular Dendritic Cell Sarcoma of the Head and Neck Region: Three New Cases, with a Review of the Literature

Extranodal Follicular Dendritic Cell Sarcoma of the Head and Neck Region: Three New Cases, with a Review of the Literature

Fine needle aspiration cytology of ectopic meningioma presenting as a neck mass: a case report and a review of the literature

Treatment recommendations for primary extradural meningiomas

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