2026
Advanced Internal Medicine Study
Companion 2026: Pathophysiology,
Diagnostics, and Therapeutic Decision-
Making
What is the definitive diagnostic test for celiac disease?
A. Serologic antibody testing
B. CT scan of the abdomen
C. Small bowel biopsy
D. Stool fat analysis
Correct Answer: C
Rationale: Small bowel biopsy showing villous atrophy is the definitive diagnostic test for celiac
disease. Serologic tests are screening tools, while imaging and stool studies are not diagnostic.
Which population is most susceptible to celiac disease?
A. African males
B. Asian males
C. Females of European descent
D. Hispanic children
Correct Answer: C
Rationale: Celiac disease occurs more commonly in females and individuals of European
descent. Other populations have lower prevalence.
Which set of symptoms fulfills the ROME IV criteria for irritable bowel syndrome?
A. Abdominal pain relieved by antacids
B. Recurrent abdominal pain at least 1 day per week with stool changes
C. Chronic diarrhea for over 6 months
D. Abdominal pain with weight loss
Correct Answer: B
,2026
Rationale: ROME IV criteria require recurrent abdominal pain at least one day per week for
three months with stool frequency, form, or defecation changes. Weight loss suggests organic
disease.
Which management strategy is appropriate for diarrhea-predominant IBS?
A. Prokinetic agents
B. Fiber supplements only
C. Loperamide or dicyclomine
D. Opioids
Correct Answer: C
Rationale: Loperamide and antispasmodics such as dicyclomine are effective for diarrhea-
predominant IBS. Prokinetics are used for constipation.
Which is a major risk factor for colorectal cancer?
A. High fiber diet
B. Irritable bowel syndrome
C. Familial adenomatous polyposis
D. Celiac disease
Correct Answer: C
Rationale: Familial adenomatous polyposis is a strong genetic risk factor for colorectal cancer.
High fiber diets are protective.
What is the most common cause of large bowel obstruction in adults?
A. Volvulus
B. Hernia
C. Colorectal cancer
D. Diverticulitis
Correct Answer: C
Rationale: Colorectal cancer is the most common cause of large bowel obstruction in adults.
Which is the best diagnostic test for suspected colorectal cancer?
A. CT abdomen
,2026
B. Barium enema
C. Colonoscopy with biopsy
D. Serum CEA level
Correct Answer: C
Rationale: Colonoscopy with biopsy confirms diagnosis. CEA is used for monitoring treatment
response, not diagnosis.
Which classification describes internal hemorrhoids that prolapse but spontaneously reduce?
A. Grade I
B. Grade II
C. Grade III
D. Grade IV
Correct Answer: B
Rationale: Grade II hemorrhoids prolapse but reduce spontaneously. Grade III requires manual
reduction, and Grade IV is irreducible.
Which treatment is indicated for stage IV internal hemorrhoids?
A. Sitz baths
B. Rubber band ligation
C. Sclerotherapy
D. Hemorrhoidectomy
Correct Answer: D
Rationale: Surgical hemorrhoidectomy is indicated for all stage IV hemorrhoids due to
irreducibility and strangulation risk.
What is the most common location of an anal fissure?
A. Anterior midline
B. Lateral wall
C. Posterior midline
D. Circumferential
Correct Answer: C
, 2026
Rationale: Anal fissures most commonly occur in the posterior midline due to reduced blood
flow.
Which topical medication promotes healing of anal fissures by reducing sphincter tone?
A. Hydrocortisone
B. Nitroglycerin
C. Antibiotic ointment
D. Lidocaine
Correct Answer: B
Rationale: Nitroglycerin is a topical vasodilator that reduces sphincter pressure and improves
blood flow, promoting healing.
Systemic lupus erythematosus is best defined as:
A. A localized inflammatory disorder
B. A chronic systemic autoimmune connective tissue disease
C. An infectious vasculitis
D. A degenerative joint disorder
Correct Answer: B
Rationale: SLE is a chronic, multisystem autoimmune disease affecting connective tissue.
Which demographic group has the highest prevalence of SLE?
A. Elderly Caucasian males
B. Females aged 20–40 years
C. Pediatric males
D. Asian females over 60
Correct Answer: B
Rationale: SLE most commonly affects women aged 20–40, particularly African Americans,
Hispanics, and Native Americans.
Which drug is known to induce lupus-like syndrome?
A. Methotrexate
B. Hydralazine
Advanced Internal Medicine Study
Companion 2026: Pathophysiology,
Diagnostics, and Therapeutic Decision-
Making
What is the definitive diagnostic test for celiac disease?
A. Serologic antibody testing
B. CT scan of the abdomen
C. Small bowel biopsy
D. Stool fat analysis
Correct Answer: C
Rationale: Small bowel biopsy showing villous atrophy is the definitive diagnostic test for celiac
disease. Serologic tests are screening tools, while imaging and stool studies are not diagnostic.
Which population is most susceptible to celiac disease?
A. African males
B. Asian males
C. Females of European descent
D. Hispanic children
Correct Answer: C
Rationale: Celiac disease occurs more commonly in females and individuals of European
descent. Other populations have lower prevalence.
Which set of symptoms fulfills the ROME IV criteria for irritable bowel syndrome?
A. Abdominal pain relieved by antacids
B. Recurrent abdominal pain at least 1 day per week with stool changes
C. Chronic diarrhea for over 6 months
D. Abdominal pain with weight loss
Correct Answer: B
,2026
Rationale: ROME IV criteria require recurrent abdominal pain at least one day per week for
three months with stool frequency, form, or defecation changes. Weight loss suggests organic
disease.
Which management strategy is appropriate for diarrhea-predominant IBS?
A. Prokinetic agents
B. Fiber supplements only
C. Loperamide or dicyclomine
D. Opioids
Correct Answer: C
Rationale: Loperamide and antispasmodics such as dicyclomine are effective for diarrhea-
predominant IBS. Prokinetics are used for constipation.
Which is a major risk factor for colorectal cancer?
A. High fiber diet
B. Irritable bowel syndrome
C. Familial adenomatous polyposis
D. Celiac disease
Correct Answer: C
Rationale: Familial adenomatous polyposis is a strong genetic risk factor for colorectal cancer.
High fiber diets are protective.
What is the most common cause of large bowel obstruction in adults?
A. Volvulus
B. Hernia
C. Colorectal cancer
D. Diverticulitis
Correct Answer: C
Rationale: Colorectal cancer is the most common cause of large bowel obstruction in adults.
Which is the best diagnostic test for suspected colorectal cancer?
A. CT abdomen
,2026
B. Barium enema
C. Colonoscopy with biopsy
D. Serum CEA level
Correct Answer: C
Rationale: Colonoscopy with biopsy confirms diagnosis. CEA is used for monitoring treatment
response, not diagnosis.
Which classification describes internal hemorrhoids that prolapse but spontaneously reduce?
A. Grade I
B. Grade II
C. Grade III
D. Grade IV
Correct Answer: B
Rationale: Grade II hemorrhoids prolapse but reduce spontaneously. Grade III requires manual
reduction, and Grade IV is irreducible.
Which treatment is indicated for stage IV internal hemorrhoids?
A. Sitz baths
B. Rubber band ligation
C. Sclerotherapy
D. Hemorrhoidectomy
Correct Answer: D
Rationale: Surgical hemorrhoidectomy is indicated for all stage IV hemorrhoids due to
irreducibility and strangulation risk.
What is the most common location of an anal fissure?
A. Anterior midline
B. Lateral wall
C. Posterior midline
D. Circumferential
Correct Answer: C
, 2026
Rationale: Anal fissures most commonly occur in the posterior midline due to reduced blood
flow.
Which topical medication promotes healing of anal fissures by reducing sphincter tone?
A. Hydrocortisone
B. Nitroglycerin
C. Antibiotic ointment
D. Lidocaine
Correct Answer: B
Rationale: Nitroglycerin is a topical vasodilator that reduces sphincter pressure and improves
blood flow, promoting healing.
Systemic lupus erythematosus is best defined as:
A. A localized inflammatory disorder
B. A chronic systemic autoimmune connective tissue disease
C. An infectious vasculitis
D. A degenerative joint disorder
Correct Answer: B
Rationale: SLE is a chronic, multisystem autoimmune disease affecting connective tissue.
Which demographic group has the highest prevalence of SLE?
A. Elderly Caucasian males
B. Females aged 20–40 years
C. Pediatric males
D. Asian females over 60
Correct Answer: B
Rationale: SLE most commonly affects women aged 20–40, particularly African Americans,
Hispanics, and Native Americans.
Which drug is known to induce lupus-like syndrome?
A. Methotrexate
B. Hydralazine
