Oesophagus and Stomach Histology: Layers, Glands, Pit-to-Gland Ratios, Gastric Cells, Virtual Slides and MCQs

Oesophagus and stomach histology: stratified squamous epithelium beside gastric pits and glands with parietal and chief cells

Subtitle: Normal histology of the oesophagus and stomach for biopsy reporting: layers, adventitia vs serosa, submucosal glands, papillae, gastric regions, pit-to-gland ratios, cell types, endocrine cells, virtual slides and 10 MCQs.

Author: PathologyMCQ Editorial Board

Category: GI Pathology / Normal Histology

Last Updated: October 2026

Read Time: 9 minutes

At-a-Glance

Oesophagus: non-keratinised squamous mucosa, submucosal glands, and adventitia (not serosa) in the thorax.
Muscle: skeletal in the upper third, mixed in the middle, smooth in the lower third.
Stomach: body and fundus have short pits and long oxyntic glands (about 1:3 to 1:4); the antrum has pits and glands of similar length (about 1:1).
Why it matters: knowing the site tells you which disease pattern to expect: H. pylori in the antrum, autoimmune gastritis in the body.

Layers of the Oesophagus

Oesophageal wallFour layers, inside out

MucosaSquamous epitheliumNon-keratinisedLamina propria and muscularis mucosae beneath

SubmucosaMucous glandsAcidic mucinDucts open onto the surface; lymphatics run here

Muscularis propriaInner circular, outer longitudinalSkeletal to smoothUpper third skeletal, middle mixed, lower third smooth

Outer layerAdventitiaNo serosa in thoraxShort abdominal segment has peritoneal covering

Exam point: the muscle type changes along the length of the oesophagus, and only the abdominal part has serosa.

Layers of the oesophageal wall: mucosa, submucosa, muscularis propria and adventitia — Layers of the oesophageal wall.

Adventitia vs Serosa

Serosa is visceral peritoneum: mesothelium over connective tissue. It covers intraperitoneal organs and lets them glide.
Adventitia is loose connective tissue that anchors the thoracic oesophagus to the mediastinum.
Why it matters: without a serosal barrier, oesophageal carcinoma can spread directly into the mediastinum. On staging, the outer layer is called adventitia (pT3), not serosa.

Submucosal Glands

Oesophageal submucosal glands secrete acidic mucin for lubrication and buffering. Their ducts are lined by squamous or cuboidal cells.
Mimics: cardiac-type glands near the junction and gastric heterotopia (the inlet patch) in the upper oesophagus.
Stain clue: on PAS-Alcian blue (pH 2.5), submucosal glands stain blue (acidic mucin) while gastric foveolar mucin stains magenta (neutral mucin).
Practical point: submucosal glands and their ducts are deep landmarks. Columnar epithelium over glands or ducts helps confirm that a biopsy is from the oesophagus, which matters when diagnosing Barrett oesophagus.

PAS-Alcian blue staining of submucosal and gastric glands — PAS-Alcian blue: acidic (blue) and neutral (magenta) mucin.

Papillae and Reflux Changes

Normal: lamina propria papillae reach less than two-thirds of the epithelial thickness, and the basal zone is less than 15% of the thickness.
Reflux pattern: elongated papillae (more than two-thirds), basal zone hyperplasia, dilated intercellular spaces and a few intraepithelial eosinophils.
Pitfall: the distal 2 to 3 cm of the oesophagus can show mild reflux-type changes in healthy people, so these features are interpreted with the biopsy level in mind.

Lamina propria papillae in the oesophageal squamous epithelium — Papillae in squamous epithelium.

Regions of the Stomach

Gastric mucosa by region

Region	Glands	Pits to glands	Key cells
Cardia	Mucous (cardiac) glands	Pits relatively long	Mucous cells; a few parietal cells may be present
Fundus and body	Oxyntic glands	About 1:3 to 1:4	Parietal cells, chief cells, ECL cells
Antrum and pylorus	Mucous (pyloric) glands	About 1:1	Mucous cells, G cells (gastrin)

Regions of the stomach and their mucosa — Regions of the stomach.

Cardia: the cardia is a short zone of mucous glands just below the junction. Inflammation here (carditis) usually reflects reflux or H. pylori, so it is worth reporting rather than calling it normal.

Cardiac mucosa near the gastro-oesophageal junction — Cardiac mucosa.

Oxyntic mucosa of the gastric body and fundus with short pits and long glands — Body and fundus: short pits, long oxyntic glands.

Antral mucosa with pits and mucous glands of similar length — Antrum: pits and glands of similar length.

Gastric Cells and Endocrine Cells

What each cell does

Cell	Location	Product	Clinical link
Parietal cell	Body and fundus, upper gland	HCl, intrinsic factor	Lost in autoimmune gastritis; B12 deficiency
Chief cell	Body and fundus, gland base	Pepsinogen	Basophilic cytoplasm; reduced in atrophy
Mucous neck cell	Gland neck	Mucus; stem cell zone	Regeneration
G cell	Antrum	Gastrin	Hyperplasia in autoimmune gastritis
ECL cell	Body and fundus	Histamine	Hyperplasia and type 1 NET in autoimmune gastritis
D cell	Antrum and body	Somatostatin	Inhibits acid and gastrin

Parietal and chief cells in oxyntic glands — Parietal and chief cells.

Endocrine cells of the stomach — Gastric endocrine cells.

Site Tells You the Disease

Match the pattern to the site

Disease	Usual site	What to look for
H. pylori gastritis	Antrum first; body too, especially on PPIs	Chronic active inflammation, curved bacilli on the surface
Autoimmune gastritis	Body and fundus, antrum spared	Loss of parietal cells, metaplasia, ECL hyperplasia
Reflux oesophagitis	Distal oesophagus	Basal hyperplasia, long papillae, few eosinophils
Barrett oesophagus	Distal oesophagus	Columnar mucosa with goblet cells, confirmed oesophageal location

Stains: H&E often shows H. pylori; Giemsa or immunohistochemistry helps when organisms are sparse. Biopsy both the antrum and the body (updated Sydney system), and label the sites separately.

Virtual Slides

Virtual slides · real casesGastric and oesophageal mucosa, H&E

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What to look for

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Test Yourself: 10 MCQs

Oesophagus and stomach histology: 10 MCQs

Layers, glands, cells and site-specific disease, with instant explanations.

Score: 0 / 10

More practice: the GI pathology MCQ bank →

Exam Pearls

Upper third skeletal, middle mixed, lower third smooth muscle.
Thoracic oesophagus has adventitia, not serosa.
Normal papillae stay below two-thirds of the epithelium; basal zone below 15%.
Body: short pits, long glands. Antrum: pits and glands of similar length.
ECL cells make histamine; G cells make gastrin; D cells make somatostatin.
H. pylori is antral-predominant; autoimmune gastritis is body-predominant with antral sparing.

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Oesophagus and stomach histology, explained

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References

Mills SE, ed. Histology for Pathologists. 5th ed. Wolters Kluwer; 2019.
Dixon MF, Genta RM, Yardley JH, Correa P. Classification and grading of gastritis: the updated Sydney System. Am J Surg Pathol. 1996;20:1161–1181.
WHO Classification of Tumours Editorial Board. Digestive System Tumours. 5th ed. IARC; 2019.
Kumar V, Abbas AK, Aster JC. Robbins and Cotran Pathologic Basis of Disease. 10th ed. Elsevier; 2020.