Pathology Flashcards
What does atresia mean?
ends in a blind pouch
An esophageal web increases the chance for which caner?
esophageal squamous cell carcinoma
What are the characteristics of plumer-vinson syndrome?
- esophagel web
- glossitis
- chelosis
- iron deficient anemia
What is the most frequent cause of Esophageal varices?
portal HTN
Inability to relax the LES is called _______
Achalasia
In which layer of the gut wall is the myenteric ganglion? (M/SM/MP/S)
in between the inner circular and outer longitudinal layers of the muscularis propria
what infectious disease is known for causing damage to the myenteric ganglion?
Chagas Dz
What are the two M.C. hiatal hernias?
- Sliding hiatal hernia
2. Para-esophageal hernia
Reflux of acid from stomach due to low LES tone is called ____
GERD
Ulceration and stricture of the esophagus can be caused by _____
GERD
In Barrett’s esophagus there is metaplasia from Non-keratinized squamous epithelium to ________
Non-ciliated columnar epithelium with goblet cells
What are the 2 MC types of esophageal caner? where do they arise?
- Adenocarcinoma, lower 1/3
2. Squamous cell carcinoma, upper 2/3
congenital malformation with exposure of the abdominal contents is called _______
Gastroschisis
Congenital persistent herniation of the bowl into the umbilical cord is called _______
Omphalocele
Which is covered by peritoneum and amnion? (gastroschisis/ omphalocele)
omphalocele
What happens in pyloric stenosis?
Congenital hypertrophy of pyloric sm. muscle, esp. in males
What are the two gross categories that cause acute gastritis?
increased acid production
decreased mucosal protection
How does increased cranial pressure result in Cushing Ulcer?
increased vagal stimulation —> increased ACh –> increased parietal cell stimulation
What are the 3 receptors that signal stomach parietal cells to secrete gastric acid?
- ACh
- Gastrin
- Histamine
What are risk factors for acute gastritis?
- Severe skin burns
- NSAIDS, reduce prostaglandins
- Heavy alcohol use
- chemotherapy
- increased intracranial pressure
- shock
In the stomach, loss of the epithelium is called _______ while loss of the mucosal layer is called ______
loss of epithelium: Erosion
Loss of mucosal layer: Ulcer
In chronic autoimmune gastritis there is destruction of the parietal cells leading to ________ found in the serum
autoantibodies
Chronic Autoimmune gastritis is a type ____ HSR
type IV
chronic autoimmune gastritis leads to _______ anemia
pernicious, megaloblastic
Which cells make gastrin? where are they located?
G-cells, antrum
What is the M.C. cause of vitamin B12 deficient?
chronic autoimmune gastritis
Goblet cells in the stomach indicates _________
intestinal metaplasia, risk for adenocarcinoma
What virulence factors help H. pylori weaken the mucosal defenses?
- Urease
2. Proteases
What region of the stomach does H. Pylori effect vs. Autoimmune gastritis?
H.p: Antrum, distal and duodenum
Auto-imm: fundus and body
H. pylori infection increases the risk for what two cancers?
- Gastric Adenocarcinoma
2. MALT lymphoma
What type of cell proliferates in a MALT lymphoma?
B-cell
Triple therapy for H. pylori is
amoxicillin, clarithromycin, and a proton pump inhibitor
A solitary mucosal ulcer of the proximal duodenum (or distal stomach) is called a ______ ______
Peptic Ulcer
Epigastric pain that improves with meals: _______
Epigastric pain that worsens w/ meals: ______
improves, Duodenal ulcer
worsens, gastric ulcer
How can you Dx a duodenal ulcer?
endoscopic biopsy shows hypertrophy of brunner glands
What are the features of a benign gastric ulcer?
“punched-out,” small, regular boarders
What are the features of a malignant gastric ulcers?
Irregular, large, ‘pilling up’ of mucosa at the edge
Gastric carcinoma is a (squamous carcinoma/ adenocarcinoma)
adenocarcinoma
What is a signet ring cell?
cell with nucleus pushed to edge due to mucin production
What is desmoplasia?
Reactive response of stroma in response to an invasive tumor
What are the 2 types of gastric carcinoma?
- Intestinal type
2. Diffuse type
What are the risk factors for Intestinal type stomach cancer?
intestinal metaplasia, nitrosamine, smoked food, blood type A
What are the characteristics of Diffuse type gastric carcinoma?
Signet ring cell that infiltrate, resulting in desmoplasia
What is the Leser-Trelat sign?
What is it associated with?
explosive onset of multiple seborrheic keratoses
ass. w/ gastric carcinoma
Gastric carcinoma often spreads to this lymph node first:
Left supraclavicular node
Gastric carcinoma that spreads bilaterally to the ovaries is called a _________ tumor
Krukenberg tumor
Based on vomit, how can you tell if a baby has esophageal atresia vs. duodenal atresia?
Duodenal will have bilious vomit, esophageal will not have bile
What does the ‘double-bubble’ sign indicate?
duodenal atresia
How does the developing fetus receive nutrients from the yolk sac?
the vitelline duct
what is it called when the vitelline duct fails to involute?
Meckel’s diverticulum
Passing meconium via the umbilicus indicates ______
Complete Failure of vitelline duct to close
–a partial failure to close would cause a Meckel’s diverticulum
Twisting of the bowel on the mesentery is called _______
volvulus
What is the MC cause of intususpeption in children? in adults?
children: Lymphoid hyperplasia
adults: tumor
The lactase enzyme is found in the ____ _____ of enterocytes
brush boarder
in Celiac’s Dz, The pathogenic component of gluten is ______
gliadin
Which cell is responsible for the tissue damage in celiac Dz?
Helper T cells
celiacs: IgA deposits at the tips of dermal papillae is called ______ _____
Dermatitis herpetiformis (blisters that look like herpes)
What is found on biopsy of celiac Dz?
Flattening of villi, hyperplasia of crypt
In celiac Dz, most of the damage is in the (duodenum/ jejunum/ ilium)
duodenum
What are the two cancers ass. with celiacs?
- Small bowel carcinoma
2. T cell lymphoma
Damage to small bowel villi due to an unknown organism is called ________ ______
tropical sprue
In tropical sprue, most of the damage is in the (duodenum/ jejunum/ ilium)
jejunum and ileum
Where is folic acid absorbed? (duodenum/ jejunum/ ilium)
Jejunum
Where is vitamin B12 absorbed?
duodenum/ jejunum/ ilium
Ileum
In whipple’s disease, the partially destroyed Tropheryma whippelii will stain with ____ inside macrophages
PAS
What are the S+S of wipple disease?
fat malabsorption and steatorrhea (macrophages compress lacteals, block lymphatic fat transport )
Carcinoid tumor stains positive for _______
chromogranin
The most common site for a carcinoid tumor is the ______ _____
small bowel