GI pathology Flashcards
what is a sialadenitis?
Inflammatory lesion of the salivary gland
what are the symptoms of sialadenitis?
Dry mouth and/or gland swelling with pain
what causes a sialadenitis to develop?
1) Sarcoidosis
2) mumps
3) salivary duct stones with obstruction
what causes Sjogren’s Disease? what group is the most at risk?
Autoimmune
most likely in 50-60 year old Females
what are the clinical characteristics of Sjogren’s disease?
Dry mouth (xerostomia), dry eyes (kerato-conjunctivitis sicca)
BILATERAL swelling of parotid glands
Increased incidence of lymphoma
which salivary gland is most frequently involved with salivary gland tumors?
Parotid gland
80% of all salivary tumors, most benign
what is the most common MALIGNANT tumor of the salivary gland?
Mucoepidermoid carcinoma
name the 2 types of benign salivary tumors
Pleomorphic adenoma (mixed tumor)
Warthin’s tumor (Papillary cystadenoma lymphomatosum)
which type of benign SALIVARY tumor has the following characteristics:
- Most common neoplasm
- Mesenchymal and epithelial component
- may undergo malignant transformation
Pleomorphic adenoma (mixed tumor)
- 60% occur in parotid
- lobulated, firm on palpation
what are the characteristics of warthin’s tumors?
- Occurs virtually only in the parotid gland
- mainly in MALES
- 10% bilateral, 10% multifocal
- Oncocytes, lymphocytes
- Benign
what are the 2 types of malignant salivary gland tumors?
- Mucoepidermoid carcinoma
2. Other carcinomas, which include Adenoid cystic and Acinic cell
what are the characteristics of mucoepidermoid carcinomas?
- Malignant
- 15% of all salivary gland tumors
- Parotid gland + minor palate glands
- may see BLUISH color
For the esophagus, what causes functional obstructive diseases? what about obstruction diseases?
- Functional: discoordinated contraction or spasm of the musculature
- Obstruction-can be mechanical e.g. due to post-inflammatory stenosis
what usually causes esophageal varices?
portal hypertension
reflux of gastric juices is central to the associated mucosal injury of _______
GERD
gastroesophageal reflux disorder
what are the symptoms of GERD?
dysphagia, heartburn, regurgitation gastric contents
what is Odynophagia? what disease is it associated with?
pain on swallowing
associated with GERD
what is Barrett Esophagus? what is it the result of?
intestinal metaplasia within the esophagus squamous mucosa
its a complication of GERD
Barrett Esophagus is associated with an increased risk for _____________
Adenocarcinoma
T/F: most people with Barrett esophagus develop esophageal tumors
FALSE
they do NOT develop esophageal tumors
what are the 2 diagnostic features of Barrett esophagus
1) extension abnormal mucosa above gastro-esophageal junction
2) demonstration of squamous metaplasia (intestinal metaplasia)
what is the “first pass effect”?
material absorbed from the GI tract are delivered to the liver via the portal vein before reaching inferior vena cava
what groups are at a higher risk for esophageal adenocarcinoma? where does it develop?
increased in caucasians, increased in males over females (7:1)
Usually develops in the distal third of the esophagus
what are the risk factors for squamous cell carcinoma of the esophagus?
EtOH
tobacco use
very hot beverages
caustic esophageal injury (acid reflux)
SCC of the esophagus occurs primarily in the _________ third of the esophagus
middle third
_________ is the most common esophageal malignancy worldwide
SCC
squamous cell carcinoma
what groups are at risk for esophageal Squamous Cell Carcinoma?
adults
over 45 yo
males > females (4:1)
name the characteristics of Acute gastritis:
- TRANSIENT, abrupt, variable pain
- Asymptomatic to ulceration
- Punctate hemorrhage, erosion, inflammation
- causes: smoking, alcohol, stress, NSAIDs, asprin
chronic gastritis is almost always associated with an infection of _____________
Helicobacter pylori
65% gastric ulcers
85-100% duodenal ulcers
T/F: the progression of chronic gastritis is relatively rapid after exposure to H. pylori
False
Often acquire the infection in childhood
what is the pathogenesis & clinical course for chronic gastritis:
Pathogenesis:
- Autoimmune e.g. pernicious anemia
- Infection, chemical
Clinical course:
- Ulceration
- cancer risk 2-4% (intestinal metaplasia)
Approximately 75% of gastric polyps are ___________ or ______________
inflammatory or hyperplastic
what are the types of benign stomach neoplasias?
hyperplastic, fundic gland polyps, adenomas & inflammatory polyps
there is an increased risk for gastric adenomas in people suffering from _______________ (a genetic disease)
Familial adenosis polyposis (FAP)
where to gastric adenomas frequently arise from?
arise in a background of atrophy and intestinal metaplasia
90% of gastric cancers are _______________
adenocarcinomas
why has the rate of GI adenocarcinoma decreased in the united states?
due to reduced use of smoked and salt-cured meat
There is an association of gastric adenocarcinoma with ________ due to increased rates for cancer of gastric cardia
GERD
what is “Linitis plastica”?
“leather bottle appearance” markedly thickened stomach wall
- very aggressive and deadly form of stomach cancer
(a type of adenocarcinoma)
Linitis plastica is a diffuse type of ___________ adenocarcinoma
stomach