Associations 4 Flashcards
Malabsorption presentation
Weight loss, bloating, diarrhea
Possible steatorrhea, glossitis (B12), dermatitis (zinc), edema
Diarrhea w/ Down Syndrome and dermatitis herpetiformis (very itchy bumps and blisters on knees, elbows, back, butt)
Celiac disease
Where is ethanol absorbed
Stomach
Where is B12 absorbed
Terminal ileum (needs intrinsic factor, made by parietal cells in stomach)
Diarrhea w/ megaloblastic anemia
Tropical sprue (folic acid replacement)
Weight loss, joint pain, abdominal pain, diarrhea, dementia, cough, bloating, steatorrhea, fever, vision abnormalities, lymphadenopathy, new heart murmur
Whipple disease (Tropheryma whippelii)
Whipple disease dx
Jejunal biopsy shows foamy macrophages on PAS stain and villous atrophy (also PCR)
MC adult chronic diarrhea
Lactose deficiency
MC childhood acute diarrhea
Rotavirus
Secretory diarrhea causes
Normal stool osmotic gap (<50) IBS Laxative abuse VIPomas, gastrinomas, medullary thyroid cancer Carcinoid tumors Ileum resection Enterotoxic bacteria
Osmotic diarrhea causes
Solute collecting in bowel lumen (increased stool osmotic gap, >50 or >125) Malabsorption syndrome Pancreatic insufficiency Lactose intolerance Excess sorbitol, lactulose, milk of Mg Laxative abuse
Inflammatory diarrhea causes
AI inflammatory process or chronic infection
Pediatric diarrhea causes
Infection (rotavirus, adenovirus)
Antibiotics (macrolides)
Immunosuppression
Stool osmotic gap calculation
290 - 2(Na + K)
125 is probably osmotic diarrhea
IBS symptoms
At least 12 wks of symptoms in previous year
Pain relieved w/ defecation
Change in frequency/form of stool
Diarrhea/constipation
Straining, mucus, incomplete feeling, bloating, urgency
Not characteristic of IBS
Anorexia Weight loss Malnutrition Progressively worsening pain Pain that prevents sleep
MCC SBO
Adhesions
Bulges (hernias)
Cancer (neoplasms)
Volvulus, intussusception, Crohn’s, gallstone ileus, bezoar, bowel wall hematoma from trauma, inflammatory stricture, congenital malformation, radiation enteritis
MCC large bowel obstruction
Neoplasm
Diverticulitis, volvulus, congenital stricture
MC benign small bowel tumor
Leiomyoma
MC malignant small bowel tumor
Adenocarcinoma
CT w/ pneumatosis coli (air in bowel wall) and bowel wall thickening
Ischemic colitis
Abdominal pain out of proportion to exam
Acute mesenteric ischemia
Signs of appendicitis
McBurney's point tenderness Psoas sign (pain on hip extension) Rovsing sign (pain w/ RLQ palpation) Obturator sign (pain w/ hip IR)
Causes of ileus
Recent surgery (MC by far) Infection, ischemia, DM, opioid use
Timeline for postop ileus
Small intestine: <24 hrs
Stomach: 2-3 days
Large intestine: 3-5 days
“Double bubble” sign + bird’s beak sign
Volvulus
Carcinoid tumor symptoms
Only if outside GI tract
Be FDR
Bronchospasm
Flushing
Diarrhea
Right-sided valvular heart disease (TC/Pulm)
Increased 5-HIAA in urine, serum serotonin
MC locations carcinoid tumor
Bronchopulmonary tree
Ileum
Rectum
Appendex (MC tumor of appendix)
Bright red painless bleeding from anus
Internal hemorrhoids (above pectinate line)
Bright red painful bleeding from anus
External hemorrhoids (below pectinate line) Anal fissure
Older person + LLQ pain + fever
Diverticulitis until proven otherwise
CT shows increased soft tissue density, colonic diverticula, bowel wall thickening, possible abscess
Diverticulitis
Mild LLQ pain relieved w/ defecation
Diverticulosis
MCC acute lower GI bleeding >40 yo
Diverticular disease (often in sigmoid colon)
APC gene mutation
FAP
Gardner syndrome
Turcot syndrome
Hundreds of polyps in colon, APC mutation
FAP (almost definite malignancy)
Cancer arises from normal-appearing mucosa, neoplasms tend to form in proximal colon
Hereditary nonpolyposis CRC (HNPCC)
Many colonic adenomas + bone and soft tissue tumors; APC mutation
Gardner syndrome (high risk of malignancy?)
Hamartomas + mucocutaneous pigmentation of mouth, hands, genitals
Peutz-Jeghers syndrome (low risk of malignancy)
Many colonic adenomas + malignant CNS tumors
Turcot syndrome (high risk of malignancy)
Polyps (usu hamartomas) of colon, small bowel, stomach that are frequent source of GI bleed
Juvenile polyposis (slightly increased risk of malignancy later in life)
Iron-deficiency anemia in older men or postmenopausal women
CRC until proven otherwise
Ranson criteria on admission
Acute pancreatitis, increased mortality with 3+ (GA Law) Glucose >200 AST >250 LDH >350 Age >55 WBC >16,000
Ranson criteria during initial 48 hrs
Acute pancreatitis, increased mortality with 3+ (CAlvin & HOBBS) Calcium 10% O2 5 Base deficit >4 Sequestration of fluid >6 L
Exocrine pancreatic cancer labs
CEA, CA 19-9
Possible hyperglcemia
+bilirubin (direct), alk phos
Trousseau syndrome
Migratory thrombophlebitis
Assoc w/ several cancers esp exocrine pancreactic ca
Gastrin-secreting tumor
Zollinger-Ellison syndrome
Refractory PUD
Insulin-secreting tumor
Insulinoma
Refractory hypoglycemia
Glucagon-secreting tumor
Glucagonoma
Refractory DM
VIP-secreting tumor
VIPoma
Watery diarrhea
TPN complications
Bile stasis - gallstones and acalculous cholestasis
Site for infx and sepsis
Female, fertile, forty, fat
Gallstones
Palpation of RUQ during inspiration stops inspiration secondary to pain
Murphy’s sign - cholelithiasis
Charcot’s triad
Fever, RUQ pain, jaundice
Acute cholangitis
Reynold’s pentad
Fever, RUQ pain, jaundice (Charcot’s triad)
AMS, Shock or HoTN
Acute cholangitis
Dx cholelithiasis vs cholecystitis vs cholangitis
US vs US/HIDA vs HIDA
Porcelain gallbladder on x-ray
Calcified GB - 10-30% cancer
Usu represents chronic cholecystitis
Prompt cholecystectomy
LUQ pain referred to L shoulder
Kehr’s sign
Splenic rupture
PBC
Intrahepatic bile duct destruction
AI
Females
+AMA (95%), +ANA (70%)
PSC
Intra and extrahepatic bile duct destruction
Assoc w/ UC
Males
+pANCA (maybe), negative AMA, ANA
Beads/Pearls on a string on ERCP
PSC