B5-019 Non-Neoplastic GI Pathology Flashcards
most common pathogens of infectious esophagitis
2
HSV-1
candida albicans
[…] is the hallmark symptom of infectious esophagitis
odnynophagia
- micro: viral inclusions in squamous cells at margin of ulcers
- multinucleation, margination, molding
- cowdry type A
HSV
gross: shallow vesicles and ulcers
HSV
- virus present in endothelium, enlarged stomal cells, and epipthelial cells at ulcer base
- nuclear and cellular enlargement
- owl’s eye inclusions
CMV
CMV esophagitis
gray-white plaques/pseudomembranes or ulcers on EGD
candida esophagitis
fungal pseudohyphae within the squamous epithelium, neutrophilic inflammation
candida esophagitis
normal esophagus
- elongation of vascular papillae
- basal cell hyperplasia
- eosinophils and neutrophils
GERD
food impaction/dysphagia symptoms in addition to GERD symptoms
eosinophilic esophagitis
endoscopy:
* linear furrows
* esophageal rings
* possible strictures
eosinophilic esophagitis
erythema, erosions, maybe strictures on EGD
GERD
similar to reflux, but more eosinophils (15ish) in both distal and proximal esophagus
eosinophilic esophagitis
- probable longstanding complication of GERD
- replacement of normal distal esophageal squamous mucosa with intestinal type glandular mucosa
Barrett’s Esophagus
irregular band of dark pink, velvety mucosa extending upward as tongues of mucosa
Barrett’s
metaplastic columnar epithelium with goblet cells
Barrett’s
normal gastric body/fundus with parietal and chief cells
pink= parietal, purple=chief
normal gastric antrum with G cells and mucus glands
curved, helical gram negative bacilli producing urease
H. pylori
often appears normal on EGD
may have erythema, nodularity, ulcers
H. pylori
- dense lamina with lymphoplasmacytic infiltrate
- neutrophils
- organisms in mucus layer
H. pylori
what part of the stomach are you more likely to find H. pylori in?
antrum
triple therapy for H. pylori
2 antibiotics and PPI
intestinal metaplasia from long standing H. pylori
AMAG leads to pernicious anemia due to
decreased B12 absoprtion
- affects parietal cells only
- causes and increased risk of cancer from NET
AMAG
lack of parietal cells, have been replaced by intestinal metaplasia
AMAG
- antrum
- neutrophils
- normal acid/gastrin secretion
- hyperplastic/inflammatory polyps
- peptic ulcer, adenocarcinoma, MALT
H. pylori or autoimmune
H. pylori
- body
- lymphocytes/macrophages
- decreased acid production
- increased gastrin production
- NET
- pernicious anemia
H. pylori or autoimmune
autoimmune
lymphocytes attack small bowel epithelium
celiac disease
what HLA types are associated with celiac disorder?
HLA-DQ2
HLA-DQ8
cracked earth appearance
celiac
- weight loss, edema, muscle wasting
- light colored, foul smelling diarrhea
celiac
normal small bowel
blunting of villi, increased intraepithelial lymphocytes
marked crypt hyperplasia
celiac
diagnosis of celiac disease
biopsy + anti-TTG and/or anti-gliaden antibodies
normal colon
chronic condition resulting from complex interactions between intestinal microbiota and host immunity in genetically predisposed individuals that leads to inappropriate mucosal immune activation
IBD
- IBD that is confined to the colon
- distribution is confluent and starts at left side/rectum
ulcerative colitis
- IBD that can involve the entire GI tract
- skip lesions, granulomas, deep ulcers with strictures
Crohn’s Disease
- crypt architectural distortion
- basal lamina propria lymphoplasmacytosis
- neutrophils in active disease
chronic colitis
Chron’s or UC
treatment for chronic colitis
anti-inflammatory and immunosuppressants; TNF-a
causes furrowing of the esophagus
eosinophilic esophagitis
official number of eosinophils needed for diagnosis of eosinophilic esophagitis
15 per high power field
cause white plaques in esophagus in immunocompromised patients
candida
involves the whole tubal gut
Chron’s
limited to colonic involvement
ulcerative colitis
ulceration and acute inflammation of the terminal ileum is more likely to be associated with
chrons or UC
Crohns
diffuse inflammation of the distal colon (sigmoid-rectum) only
ulcerative colitis
multinucleate squamous cells with chromatin margination
HSV esophagitis
- well circumscribed ulcers in the distal esophagus with flat borders
- odynophagia
- immunocompromised patient
2
CMV or HSV
atypical glands infiltrating the submucosa
adenocarcinoma
mass like ulceration and dysphagia
adenocarcinoma
fungal elements on PAS/D stain
candida
more than 15 eosinophils per high powered field
eosinophilic esophagitis
- cracked earth appearance of duodenum
- blunted duodenal villi with increased intraepithelial lymphocytes
celiac
trial of six food elimination diet is a therapeutic option for
eosinophilic esophagitis
- attentuated crypt epithelium
- hyalinized lamina propria
acute ischemic colitis
basal lymphoplasmacytosis
IBD colitis
increased intraepithelial lymphocytes
lymphocytic colitis
causes chronic watery diarrhea
- mucosal granulomas
- submucosal lymphoid aggregates
Crohn’s
treatment for lymphocytic colitis
immunosuppression with corticosteroids
- chronic gastritis
- urea breath test is positive
H. pylori
treatment for H. pylori
triple therapy with omeprazole and two antibiotics
- macrocytic anemia
- elevated gastrin
- positive anti-parietal antibody
AMAG