Cystic duplication of the cecum lined by dermal type squamous epithelium

1986 ◽  
Vol 21 (11) ◽  
pp. 960-961 ◽  
Author(s):  
Hitoshi Ikeda ◽  
Takuji Nakamura ◽  
Shiro Matsuyama ◽  
Kikuo Nagashima ◽  
Atsushi Takahashi ◽  
...  
Keyword(s):  
Squamous Epithelium ◽  
Cystic Duplication

An unusual presentation of a cystic duplication of the sigmoid colon entirely lined with squamous epithelium

2009 ◽  
Vol 44 (9) ◽  
pp. 1831-1834 ◽  
Author(s):  
Gregory Rodesch ◽  
Jean Louis Dargent ◽  
Annick Haller ◽  
Marie Cassart ◽  
Freddy Avni ◽  
...  
Keyword(s):  
Sigmoid Colon ◽  
Squamous Epithelium ◽  
Unusual Presentation ◽  
Cystic Duplication

Junction of the Epithelium and Lamina Propria of the Bovine Rumen Mucosa

1967 ◽  
Vol 25 ◽  
pp. 68-69
Author(s):  
Al W. Stinson
Keyword(s):  
Osmium Tetroxide ◽  
Squamous Epithelium ◽  
Short Chain Fatty Acids ◽  
Chloride Ions ◽  
Fermentation Products ◽  
Ruminant Species ◽  
Protective Shield ◽  
Stratified Squamous Epithelium ◽  
Lead Hydroxide ◽  
Acetic Acids

The stratified squamous epithelium which lines the ruminal compartment of the bovine stomach performs at least three important functions. (1) The upper keratinized layer forms a protective shield against the rough, fibrous, constantly moving ingesta. (2) It is an organ of absorption since a number of substances are absorbed directly through the epithelium. These include short chain fatty acids, potassium, sodium and chloride ions, water, and many others. (3) The cells of the deeper layers metabolize butyric acid and to a lesser extent propionic and acetic acids which are the fermentation products of rumen digestion. Because of the functional characteristics, this epithelium is important in the digestive process of ruminant species which convert large quantities of rough, fibrous feed into energy.Tissue used in this study was obtained by biopsy through a rumen fistula from clinically healthy, yearling holstein steers. The animals had been fed a typical diet of hay and grain and the ruminal papillae were fully developed. The tissue was immediately immersed in 1% osmium tetroxide buffered to a pH of 7.4 and fixed for 2 hrs. The tissue blocks were embedded in Vestapol-W, sectioned with a Porter-Blum microtome with glass knives and stained with lead hydroxide. The sections were studied with an RCA EMU 3F electron microscope.

Surface Ultrastructure of Human Ectocervix in Certain Pathological Conditions

1985 ◽  
Vol 43 ◽  
pp. 570-571
Author(s):  
S. Mukherjee ◽  
T. Guha ◽  
B. Chakrabarti ◽  
P. Chakrabarti
Keyword(s):  
Epithelial Cells ◽  
Marked Reduction ◽  
Squamous Epithelium ◽  
Malignant Tumour ◽  
Surface Ultrastructure ◽  
Normal Tissues ◽  
Pathological Conditions ◽  
Hexagonal Shape ◽  
Columnar Cells ◽  
Scanning Electron

The cervix is an important organ in reproduction. Its malfunction is frequently a factor for infertility. Ectocervix region does not appear to have received much attention although many studies have been reported on the endocervix. We report here our SEM observations on ectocervix in certain pathological conditions compared to normal ectocervix.Ectocervix specimens from human females with specific pathological disorders were processed for Scanning Electron Microscopy by conventional method and they were examined in a Philips SEM.The normal ectocervix is lined by flat layer of squamous epithelial cells with microridges (Fig. 1). These cells are known to be formed from columnar cells through metaplastic transformation. The cells of carcinoma-bearing ectocervix show a disorganised appearance (Fig. 2). In non-malignant tumour surface some cuboidal and few columnar cells were seen (Fig. 3). A cyst appears like an overgrowth on the surface of the squamous epithelium (Fig. 4). In ulcerated ectocervix a marked reduction of epithelial cells are observed (Fig. 5); the cells are devoid of microridges and, the large polygonal cells, as observed in normal tissues, have somehow acquired comparatively small hexagonal shape

Comparison of localization of metallothionein in tissues of metallothionein-deficient mice

1995 ◽  
Vol 53 ◽  
pp. 1042-1043
Author(s):  
H. Nishimura ◽  
R Nishimura ◽  
D.L. Adelson ◽  
A.E. Michaelska ◽  
K.H.A. Choo ◽  
...  
Keyword(s):  
Metal Binding ◽  
Immunohistochemical Staining ◽  
Squamous Epithelium ◽  
Rabbit Antiserum ◽  
Slight Modification ◽  
Positive Control ◽  
Heavy Metal Binding ◽  
Critical Organ ◽  
Metal Binding Protein ◽  
Deficient Mice

Metallothionein (MT), a cysteine-rich heavy metal binding protein, has several isoforms designated from I to IV. Its major isoforms, I and II, can be induced by heavy metals like cadmium (Cd) and, are present in various organs of man and animals. Rodent testes are a critical organ to Cd and it is still a controversial matter whether MT exists in the testis although it is clear that MT is not induced by Cd in this tissue. MT-IV mRNA was found to localize within tongue squamous epithelium. Whether MT-III is present mainly glial cells or neurons has become a debatable topic. In the present study, we have utilized MT-I and II gene targeted mice and compared MT localization in various tissues from both MT-deficient mice and C57Black/6J mice (C57BL) which were used as an MT-positive control. For MT immunostaining, we have used rabbit antiserum against rat MT-I known to cross-react with mammalian MT-I and II and human MT-III. Immunohistochemical staining was conducted by the method described in the previous paper with a slight modification after the tissues were fixed in HistoChoice and embedded in paraffin.

scholarly journals Symptomatic Heterotopic Gastric Mucosa in Distal Esophagus

2021 ◽  
Author(s):  
Avnish Kumar Seth ◽  
Mahesh Kumar Gupta ◽  
Gursimran Kaur ◽  
Priti Jain ◽  
Rinkesh Kumar Bansal
Keyword(s):  
Gastric Mucosa ◽  
Squamous Epithelium ◽  
Narrow Band Imaging ◽  
Distal Esophagus ◽  
Heterotopic Gastric Mucosa ◽  
Retrosternal Pain ◽  
Gastric Type ◽  
History Of ◽  
Mass Lesions

Abstract Introduction Heterotopic gastric mucosa (HGM) in esophagus is commonly noted as an inlet patch at endoscopy. We describe a rare patient with symptomatic distal esophageal HGM. Case Report A 40-year-old male presented with retrosternal pain and marked odynophagia for the last 4 weeks without any history of ingestion of antibiotics, foreign body, or corrosive. Endoscopy showed abrupt circumferential transition to salmon pink mucosa at 35 cm from incisors. From 35 to 41 cm, there were areas of polypoid edematous thickening with few superficial ulcers of 1 to 3 mm. Squamous epithelium was visualized at narrow band imaging from 41 cm to the Z-line at 43 cm with no hiatus hernia. Biopsy showed gastric-type mucosa with parietal cells without dysplasia. Serology for cytomegalovirus and human immunodeficiency virus was negative. He was managed with proton pump inhibitors (PPIs) and prokinetics and improved symptomatically. Follow-up endoscopy at 3 months demonstrated healing of ulcers with persistence of HGM and pseudopolyps. He remains well on maintenance with PPI at 1-year follow-up. Conclusion Symptomatic HGM in distal esophagus is rare and can be differentiated from Barrett’s esophagus histologically and by presence of squamous epithelium between HGM and stomach. Inflammatory mass lesions may develop and mimic esophageal malignancy. Symptoms are largely due to acid production and usually respond to PPI.

scholarly journals Oesophageal squamous cell carcinoma mimicking submucosal tumour

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Wen Wang ◽  
Dazhou Li ◽  
Linfu Zheng ◽  
Hongli Zhan
Keyword(s):  
Squamous Cell Carcinoma ◽  
Cell Carcinoma ◽  
Squamous Cell ◽  
Squamous Epithelium ◽  
Pathological Examination ◽  
Muscularis Mucosa ◽  
Case Presentation ◽  
Duct Epithelium ◽  
Tumour Spread ◽  
Positron Emission

Abstract Background Oesophageal submucosal tumours are usually benign. We report a rare case of esophageal squamous cell carcinoma presenting as a submucosal tumour. Case presentation A 58-year-old man undergoing screening oesophago-gastroduodenoscopy was found to have a smooth-surfaced 0.6-cm sized submucosal tumour in the oesophagus 30 cm from the incisor. Endoscopic ultrasonography showed the tumour to be located in the muscularis mucosa; the lesion was heterogeneously hypoechoic and had a clear boundary. With a provisional diagnosis of leiomyoma, the tumour was removed by endoscopic submucosal dissection. Pathological examination showed it to be a moderately differentiated infiltrating squamous cell carcinoma, with normal overlying squamous epithelium. Immunohistochemistry indicated that it was caused by malignant transformation in mucosal glandular duct epithelium. Positron emission tomography–computer tomography showed no tumour spread to any other site. The patient was treated by oesophageal resection. Conclusion The clinician should be aware that oesophageal submucosal tumours with smooth overlying mucosa may not always be benign; malignancy must be ruled out.

scholarly journals Nrf2/Keap1-Pathway Activation and Reduced Susceptibility to Chemotherapy Treatment by Acidification in Esophageal Adenocarcinoma Cells

Cancers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2806
Author(s):  
Lucie Storz ◽  
Philipp Walther ◽  
Olga Chemnitzer ◽  
Orestis Lyros ◽  
Stefan Niebisch ◽  
...  
Keyword(s):  
Esophageal Adenocarcinoma ◽  
Squamous Epithelium ◽  
Acid Reflux ◽  
Cellular Damage ◽  
Pathway Activation ◽  
Cellular Context ◽  
Vitro Model ◽  
Nfκb Pathway ◽  
Eac Cells

Chronic acid reflux causes cellular damage and inflammation in the lower esophagus. Due to these irritating insults, the squamous epithelium is replaced by metaplastic epithelium, which is a risk factor for the development of esophageal adenocarcinoma (EAC). In this study, we investigated the acid susceptibility in a Barrett’s cell culture in vitro model, using six cell lines, derived from squamous epithelium (EPC1 and EPC2), metaplasia (CP-A), dysplasia (CP-B), and EAC (OE33 and OE19) cells. Cells exposed to acidic pH showed a decreased viability dependent on time, pH, and progression status in the Barrett’s sequence, with the highest acid susceptibility in the squamous epithelium (EPC1 and EPC2), and the lowest in EAC cells. Acid pulsing was accompanied with an activation of the Nrf2/Keap1- and the NFκB-pathway, resulting in an increased expression of HO1—independent of the cellular context. OE33 showed a decreased responsiveness towards 5-FU, when the cells were grown in acidic conditions (pH 6 and pH 5.5). Our findings suggest a strong damage of squamous epithelium by gastroesophageal reflux, while Barrett’s dysplasia and EAC cells apparently exert acid-protective features, which lead to a cellular resistance against acid reflux.

scholarly journals Significance of miR-141 and miR-340 in cervical squamous cell carcinoma

Open Medicine ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. 864-872
Author(s):  
Wenting Li ◽  
Bo Yang ◽  
Yiqun Li ◽  
Cuicui Wang ◽  
Xinzhi Fang
Keyword(s):  
Squamous Cell Carcinoma ◽  
Cell Carcinoma ◽  
Squamous Cell ◽  
Target Gene ◽  
Squamous Epithelium ◽  
Figo Stage ◽  
Cervical Squamous Cell Carcinoma ◽  
Squamous Intraepithelial Lesion ◽  
Nerve Invasion ◽  
Intraepithelial Lesion

Abstract Background We investigated the expression and clinical significance of miR-141 and miR-340 in cervical squamous cell carcinoma (CSCC). Methods Expression of miR-141 and miR-340 in CSCC, high-grade squamous intraepithelial lesion (HSIL), and normal cervical squamous epithelium were detected by qRT-PCR. PTEN was assessed by immunohistochemistry. Their relationship with clinicopathological features was analyzed. Results The changes of miR-141 and miR-340 were different in CSCC, HSIL, and normal squamous epithelium (P = 0.030). miR-141 expression was statistically significant in gross type, differentiation, uterine corpus invasion, nerve invasion, vagina invasion, and FIGO stage in CSCC (P < 0.05). miR-340 expression was related to tumor size, differentiation, nerve invasion, lymph node metastasis, and FIGO stage in CSCC (P < 0.05). miR-141 and miR-340 expressions were statistically significant in different ages (P < 0.05) in HSIL. The AUC of miR-141 in CSCC diagnosis and that of miR-340 in HSIL diagnosis were 0.893 and 0.764, respectively. The sensitivity and the specificity of miR-141 for diagnosis of CSCC were 95.0% and 60.8%, respectively, while those of miR-340 for diagnosis of HSIL were 90.0 and 48.6%, respectively. miR-141 and miR-340 expressions are associated with PTEN expression (P = 0.002 and P < 0.001). Conclusion miR-141 and miR-340 may be associated with their target gene PTEN and involved in the carcinogenesis of cervical squamous epithelium.

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