Comparative study of mast cell count in oral reactive lesions and its association with inflammation

Objectives. Microscopic colitis (MC) is characterized by chronic diarrhea, normal colonoscopy findings, and mucosal inflammation in colonic biopsies and can be classified as collagenous colitis (CC) or lymphocytic colitis (LC). However, the pathogenesis of MC is largely unknown. In this study, we aimed to study mast cell counts and activation in MC. Methods. We investigated 64 biopsy samples from the surgical pathology database of Indiana University Health, which met the diagnostic criteria for CC or LC along with 20 control samples collected from 2014 to 2015. The specimens were used for the quantification of mast cells by examining the presence of intracellular and extracellular tryptase by immunohistochemistry. Results. In the lamina propria, the mast cell count was higher in both CC and LC groups than the control (mean highest count, 39/high-power field (HPF) vs. 30/HPF vs. 23/HPF; P<0.01). Extracellular tryptase was present in 10% of control subjects as compared to 41% of CC (P<0.05) and 60% of LC (P<0.001) patients. When LC patients were stratified into two groups with either <80% or >80% of fragments affected by inflammation, increased mast cell counts are only observed in the >80% involvement group compared with the control, but not the <80% involvement group. Conclusions. The increased mast cell count and degranulation are identified in MC, suggesting that mast cell activation might be involved in the pathogenesis of MC.

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Morphometric study of the fibrosis and mast cell count in the circular colon musculature of chronic Chagas patients with and without megacolon

Revista da Sociedade Brasileira de Medicina Tropical ◽

10.1590/s0037-86822003000400005 ◽

2003 ◽

Vol 36 (4) ◽

pp. 461-466 ◽

Cited By ~ 22

Author(s):

Simone Wanderley Pinheiro ◽

Adilha Misson de Oliveira Rua ◽

Renata Margarida Etchebehere ◽

Cristiane Gobbo Cançado ◽

Javier Emílio Lazo Chica ◽

...

Keyword(s):

Mast Cell ◽

Cell Count ◽

Fibrous Tissue ◽

Morphometric Study ◽

Significant Difference ◽

Mast Cell Count ◽

Distal Sigmoid

A morphometric study of the circular colon musculature was performed, in which the mast cell count was determined and the connective fibrous tissue in this layer was measured. The objective was to gain better understanding of Chagas megacolon morphology and contribute towards the knowledge of fibrosis pathogenesis in Chagas megas. An evaluation was made of 15 distal sigmoid rings from Chagas patients with megacolon (MCC), 15 without megacolon (CSMC) and 15 non-Chagas patients (NC). The rings were fixed in formol, embedded in paraffin, and 7mm thick sections were cut and stained using Azan-Heidenhain and Giemsa. The mast cell count and fibrosis were greater in the MCC group than in the CSMC and NC groups (p < 0.05; Kruskal-Wallis test) and there was no significant difference between the latter two. The fibrosis and increased mast cell count in the colon musculature of the MCC group possibly indicates that there is a relationship between mastocytosis and fibrosis, as has already been demonstrated in other pathologies.

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Correlation between testicular mast cell count and spermatogenic epithelium in non-obstructive azoospermia

International Journal of Experimental Pathology ◽

10.1111/iep.12261 ◽

2018 ◽

Vol 99 (1) ◽

pp. 22-28 ◽

Cited By ~ 5

Author(s):

Ahmed A. M. Abdel-Hamid ◽

Hoda Atef ◽

Khaled R. Zalata ◽

Atef Abdel-Latif

Keyword(s):

Mast Cell ◽

Cell Count ◽

Obstructive Azoospermia ◽

Mast Cell Count ◽

Spermatogenic Epithelium

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Does cystoscopy method affect the investigation of bladder pain syndrome/interstitial cystitis?

International Urogynecology Journal ◽

10.1007/s00192-020-04512-0 ◽

2020 ◽

Author(s):

Visha K. Tailor ◽

Ellen Morris ◽

Alka A. Bhide ◽

Ruwan Fernando ◽

Guiseppe A. Digesu ◽

...

Keyword(s):

Mast Cell ◽

Cell Count ◽

Interstitial Cystitis ◽

Muscularis Propria ◽

Pain Syndrome ◽

Bladder Pain Syndrome ◽

Detrusor Muscle ◽

Bladder Pain ◽

Significant Difference ◽

Mast Cell Count

Abstract Introduction and hypothesis Cystoscopic investigation to identify associated histological findings of increased mast cells in the detrusor muscle has been recommended by the European Society for the Study of Bladder Pain Syndrome (ESSIC) in the investigation of bladder pain syndrome/interstitial cystitis (BPS/IC). The aim of this study was to identify if the cystoscopy approach impacts the biopsy results when investigating women presenting with symptoms of BPS/IC. Methods We performed a single-centre retrospective analysis of 300 bladder biopsy reports from 2015 to 2018 from women undergoing cystoscopy for BPS/IC. Biopsies obtained using closed cup forceps through a flexible (FC) or rigid cystoscope (RC) were compared. Results Fifty-eight FC biopsies were compared with 242 RC biopsies. FC biopsies had a smaller mean diameter (1.6 mm vs 2.9 mm p < 0.01) and volume (4.1 mm3 vs 9.6 mm3p < 0.001) compared with RC biopsies. There was no significant difference in the histological depth of sampling to the muscularis propria. A total of 292 samples had CD117 immunohistochemical staining for mast cell count (MCC) analysis. The MCC/mm2 was significantly lower in FC biopsies (p < 0.01). Sixteen percent of FC samples compared with 60% of RC samples had a high MCC >28/mm2 (p < 0.01). There was no significant difference in positive microbiology culture between FC (21%) and RC (28%) sampling. Conclusion Rigid and flexible cystoscopy can be used to investigate BPS/IC as recommended by international societies. However, the biopsy method impacts the mast cell count analysis, which can influence diagnosis and management. Therefore, RC would be the optimal investigation.

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