Subgemmal neurogenous plaque

The study aims to describe six subgemmal neurogenous plaque (SNP) cases and compile the previously available data on SNP. Searches on PubMed, Web of Science, Embase, Scopus, and a two-step study selection were performed to compile data from case reports/series of SNP published in English literature. Our six patients (range 29-63 years) had SNP in the posterior lateral border of the tongue. Four of them were associated with lymphoepithelial cysts. A total of 15 studies, comprising 116 patients, were included in this overview...

BACKGROUND: Subgemmal neurogenous plaques (SNP) are composed of neural structures found in the posterolateral portion of the tongue, rarely biopsied as most of them are asymptomatic or eventually only clinically managed. We aimed to investigate a case series of possible correlation of symptomatic subgemmal neurogenous plaque (SNP) with coronavirus disease 2019 (COVID-19). METHODS: Eleven formalin-fixed paraffin-embedded cases from patients with previous confirmed COVID-19 (by RT-PCR) were retrieved from two pathology files...

INTRODUCTION: The subgemmal neurogenous plaque is a well-defined subepithelial neural plexus associated with taste buds, located within foliate, fungiform, and circumvallate papillae of the human tongue, that is poorly known by dentists and medical professionals. The hyperplasia of subgemmal neurogenous plaque may occur and it manifests as a papule, nodule, plaque, or ulcer in the lateral posterior border of the tongue inducing the overdiagnosis of reactive, cystic, or neoplastic lesions...

The oral lymphoepithelial cyst (OLC) is an uncommon lesion whose pathogenesis remains poorly understood. The aim of this study was to report the clinicopathologic features of the OLCs and to verify a possible association between OLCs and subgemmal neurogenous plaque (SNP) in the posterior lateral region of the tongue. A retrospective descriptive cross-sectional study was carried out. A total of 106,282 biopsy records of oral and maxillofacial lesions from six oral pathology services in Brazil were analyzed...

BACKGROUND: Analyze the clinical, demographic, histopathological, and immunohistochemical features of oral lymphoepithelial cyst (OLEC). METHODS: Samples were retrospectively retrieved from five oral pathology services. Clinical and demographic data were collected from patient charts. Histopathological and immunohistochemical (CD3 and CD20) features were evaluated. Data analysis involved descriptive statistics and bivariate analyses (P ≤ .05). RESULTS: Seventy-seven cases were found among a total of 146 150 specimens (0...

Objective: In humans, subgemmal neurogenous plaques (SNPs) are normally found associated with taste buds. On histology, SNP may be mistaken for a neural neoplasm. The objective of this study was to correctly differentiate SNP among head and neck neural lesions and provide clinical and pathologic information that may assist in avoiding misdiagnosis. To our knowledge, this is the first study to provide an estimate of the degree of overdiagnoses of mucosal lesions in the head and neck mucosal area...

A young otherwise healthy male presented with asymptomatic pinkish-red nodule over postero-lateral tongue with the suspicion of having developed oral cancer. Biopsy from the lesion showed multiple circumscribed nodules in the lamina propria comprised of numerous oval and spindle-shaped cells. Abundant lymphatic tissue with germinal centres were also observed. Differentials included mucosal neuroma, traumatic neuroma, subgemmal neurogenous plaque, neurofibroma, and lingual tonsils. This quiz discusses the diagnosis and approach to the differential diagnoses in such a clinical setting...

PURPOSE: We aimed to compare the histomorphological features of oral lymphoepithelial cysts (OLC) in different locations of the oral cavity and to verify the association between oral lymphoepithelial cysts and subgemmal neurogenous plaque (SNP) on biopsies from the lateral border of the tongue. METHODS: All cases diagnosed as OLC from the Oral Pathology Service at the School of Dentistry/University of São Paulo were retrieved. For all the cysts located in the tongue, their association to SNP was analyzed...

Subgemmal neurogenous plaque (SNP) is a biphasic neural structure associated with the taste buds. Clinically, SNP usually presents as an asymptomatic, normally colored, papule located in the posterior lateral border of the tongue. Accurate diagnosis is based only on histopathological examination, which shows a superficial neurofibroma-like pattern and a neuroma-like in the deep zone. Appropriate recognition of clinical and morphological aspects of SNPs can avoid their misdiagnosis as neural neoplasms. We report three cases of SNP with detailed clinical, histopathological, and immunohistochemical features...

OBJECTIVES: The aim of this study was to characterize the histomorphometric features of subgemmal neurogenous plaques (SNPs) to better understand their relationship to surrounding microanatomy included in the tissue biopsy samples of the tongue. STUDY DESIGN: A 12-year retrospective study on the files of 3 oral pathology centers yielded 28 SNPs. Hematoxylin and eosin-stained sections were used for histologic analysis, and immunohistochemical staining for S100 protein was performed to better characterize the neural structures...

Subgemmal neurogenous plaques (SNPs) are biphasic neural structures found on the posterolateral border of the tongue. Fewer than 40 cases have been reported and only a few were symptomatic. The present report details the features of 7 cases of SNP retrieved from the files of a single institution. Clinical and histopathological data were reviewed and immunohistochemical analysis was performed for S100, CD56, neuron-specific enolase, epithelial membrane antigen, CK7, CK8, CK14, and CK20. All cases showed similar morphological and immunohistochemical characteristics...

Subgemmal neurogenous plaques, biphasic structures with a neurofibroma and neuroma patterns, are observed in tongue biopsies involving subepithelial areas, being characterized as aggregates of nerve plexus and ganglion cells. Oral burning symptoms, having many possible causes, are commonly observed during oral medicine practice, but the association of subgemmal neurogenous plaque with tongue burning symptoms is very unusual. Reported here are two cases of focal burning sensation in the lateral border of the tongue diagnosed as subgemmal neurogenous plaque through biopsy...

Pseudoepitheliomatous hyperplasia is a reactive proliferation of benign squamous epithelium that can mimic squamous cell carcinoma. Herein is a report on this type of reaction on two subgemmal neurogenous plaques in a lingual circumvallate papilla. To the authors' knowledge this is the first report on this combination of lesions. A 66-year-old man died with disseminated squamous cell carcinoma of the lung. At autopsy the tongue was found to have an incidental pseudoepitheliomatous hyperplasia on two subgemmal neurogenous plaques with ganglion cells...

Little is known about subgemmal neurogenous plaques in the foliate papillae of tongue, which prompted the present investigation. The plaques were immunohistochemically studied in biopsies from 16 adults with the use of neural, stromal, basement membrane, and cell-cycle markers. They displayed a zonal pattern of organization. The neurofibroma-like superficial zone expanded lamina propria and was contiguous to the epithelium covering the papillae. It consisted of tangled composites of S-100 protein-positive spindled cells and fibrils stained for protein gene product 9...