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Alcohol-induced liver disease
Alpha 1-antitrypsin deficiency
Benign liver tumors
Cholestatic liver disease
Non-alcoholic fatty liver disease
Primary biliary cirrhosis
Primary sclerosing cholangitis
Pancreatic neuroendocrine neoplasms
Familial adenomatous polyposis
Juvenile polyposis syndrome
Small bowel ischemia and infarction
Protein losing enteropathy
Short bowel syndrome (NORD)
Small bowel bacterial overgrowth syndrome
Diverticulosis and diverticulitis
Irritable bowel syndrome
Cleft lip and palate
Congenital diaphragmatic hernia
Diffuse esophageal spasm
Eosinophilic esophagitis (NORD)
Gastroesophageal reflux disease (GERD)
Cyclic vomiting syndrome
Gastric dumping syndrome
Dental caries disease
Gingivitis and periodontitis
Temporomandibular joint dysfunction
Appendicitis: Pathology review
Cirrhosis: Pathology review
Colorectal polyps and cancer: Pathology review
Congenital gastrointestinal disorders: Pathology review
Diverticular disease: Pathology review
Esophageal disorders: Pathology review
Gallbladder disorders: Pathology review
Gastrointestinal bleeding: Pathology review
GERD, peptic ulcers, gastritis, and stomach cancer: Pathology review
Inflammatory bowel disease: Pathology review
Jaundice: Pathology review
Malabsorption syndromes: Pathology review
Neuroendocrine tumors of the gastrointestinal system: Pathology review
Pancreatitis: Pathology review
Viral hepatitis: Pathology review
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Aphthous ulcers, often called canker sores, are painful inflammatory lesions or spots on the inside of the mouth.
Most often, people develop minor aphthous ulcers, which is where the lesions are a few millimeters across, round or oval in shape, and disappear within a week.
The underlying cause of this inflammatory disease is not well understood. One theory suggests tissue specific autoimmunity, where a localized cell-mediated immune reaction happens in the oral mucosa creating an accumulation of T-cells, specifically T helper cells Th1 cells, and macrophages, as well as chemokines like interferon-gamma and tumor necrosis factor.
Initially there is a small raised bump of inflammation in your mouth, and as it heals it turns into an ulcer covered by a fibrous membrane “cap” that looks yellowish-white or gray with well defined margins.
The ulcer is typically surrounded by a characteristic red halo due to inflammation in neighbouring blood vessels.
Aphthous ulcers are usually mildly painful and annoying, with individual lesions measuring a few millimeters across and healing within 7 to 10 days without scarring. And these usually recur 3-4 times per year.
There are some variations on this general pattern. Some individuals have recurrent aphthous ulcers which is where the recurrence is more frequent - sometimes each month, and this starts during childhood and resolves around age 40.
Another variation is major aphthous ulcers which describes lesions that measure over one centimeter in size and are generally more painful, last longer, and recur frequently.
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