Chapter 14 - Abdominal Flashcards
Which race has the highest incidence of colorectal cancer?
African Americans
Which race has the lowest incidence of colorectal cancer?
Native Americans
The lifetime risk of colonic cancer is 100% for patients with ____
Polyposis coli
What kind of diet puts a person at higher risk for colonic cancer?
Low fiber
High fat
What is the MC type of liver cancer?
Hepatocellular carcinoma
The incidence of liver cancer has been _____
Increasing
Rates of liver cancer are highest in which races?
Asians, Pacific islanders, Hispanics
MC causes of liver cancer in US/western countries
Alcohol-related cirrhosis and fatty liver disease from obesity
MC causes of liver cancer worldwide (outside of US)?
HBV and HCV
What increases the risk of pancreatic cancer?
Smoke and smokeless tobacco
Which organs are located posteriorly in the abdomen (so unlikely to be palpated)?
Kidneys
Duodenum
Pancreas
Why can a child’s kidneys be palpated?
Less developed abdominal muscles
What is dysphagia?
Difficulty swallowing
What is chyme?
Semifluid creamy material produced by gastric digestion of food
Emptying of the stomach is normally complete within:
6 hours of eating
When is the flow of pancreatic juice maximal?
Approx. 2 hours after a meal
What are the 3 enzymes of chyme?
Lipase (fats)
Amylase (starches)
Trypsin (proteins)
Where are bile acids and Vit B12 absorbed?
Ileum
What is the dark color of stool caused by?
Presence of stercobilin (a metabolite of bilirubin)
What are acholic stools?
- No bile
- Pale brown to gray
Most abdominal disease manifests itself with:
Pain!
Abdominal pain can result from:
- Mucosal irritation
- Smooth muscle spasm
- Peritoneal irritation
- Capsular swelling
- Direct nerve stimulation
3 categories of abdominal pain
- Visceral
- Parietal
- Referred
When does visceral pain develop?
Hollow abdominal organs contract forcefully or their walls are stretched
How is visceral pain usually described by the patient?
Gnawing, burning, aching
Difficult for pt to locate specifically
How does parietal pain develop?
Inflammation of peritoneum
- Extremely severe, patient can locate over a specific organ usually
- Movement exacerbates the pain
How does pain vary between gastric and duodenal ulcers?
- Gastric: pain 30 mins to 1 hr after a meal
- Duodenal: pain 2-3 hours after eating or before next meal
Nocturnal pain is a symptom of what abdominal condition?
Duodenal peptic ulcer
What triad of symptoms are found in abdominal angina?
Postprandial pain
Anorexia
Weight loss
What does abdominal angina result from?
Obstructive vascular disease in celiac axis or superior mesenteric artery
Cystitis vs. ureteral pain
- Cystitis: dull pressure a/w burning during urination
- Ureteral: extremely severe and colicky
Vomiting resulting from perforation is commonly ____
NOT massive
Vomiting resulting from obstruction is:
Episodic and at the height of pain
What generally causes persistent vomiting?
Toxins
In acute appendicitis, how do pain and vomiting usually present?
Pain precedes vomiting usually by a few hours
What is feculent vomitus usually caused by?
Intestinal obstruction
_____ is a disease of the colon that produces bloody diarrhea
Shigellosis
-Amebiasis is also a/w bloody diarrhea
Describe diarrhea/constipation in patients with colon cancer or diverticulitis
Diarrhea and constipation frequently alternate
_____ stools may result from malabsorption syndromes
Floating
How does diarrhea classically present in IBS?
More in the morning
“Pencil” diameter stools may result from:
Anal or distal rectal carcinoma
What are black feces a/w?
- Meds like Pepto Bismol, dietary iron supplements
- Foods like black licorice or blueberries
What is hematochezia and what is it a/w?
- Bright red blood per rectum (BRBPR)
- Can occur from colonic tumors, diverticular disease, ulcerative colitis
What is tenesmus?
- Painful ineffective straining at stool
- Caused by inflammation or a space-occupying lesion (e.g. tumor)
What is a common cause of hematochezia?
Hemorrhoidal bleeding