Want to test your pathology knowledge before the OMS exam? Below are free sample flashcards from the 160-card pathology section of our 1020-card OMS (Ostomy Management Specialist) deck, which covers Ulcerative Colitis, SBS, Short Bowel Syndrome, Peristomal Pyoderma Gangrenosum and more.
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A patient with Crohn's disease is scheduled for an ileostomy. Which pathological feature of Crohn's disease most significantly increases the risk for enterocutaneous fistula formation compared to Ulcerative Colitis?
Show answer →Transmural inflammation. Unlike Ulcerative Colitis (UC), which is typically limited to the mucosa and submucosa, Crohn's disease (CD) involves all layers of the bowel wall. This transmural nature leads to deep ulcerations and fissures that can penetrate the serosa, creating abnormal tracts (fistulae) between the bowel and other organs or the skin. NAWCO exams emphasize that the depth of involvement is the primary driver for CD-specific complications like fistulas, abscesses, and strictures. Clinical Pearl: Always assess the peristomal plane for drainage that may indicate a new fistula tract in CD patients.
During a radical cystectomy for a male patient, which specific structures are typically removed along with the bladder?
Show answer →In males, a radical cystectomy involves the removal of the bladder, prostate, seminal vesicles, and the distal ureters. The proximal urethra may also be removed depending on the proximity of the tumor to the bladder neck. Clinical Pearl: Removal of the prostate and seminal vesicles often results in erectile dysfunction and retrograde ejaculation. Preoperative counseling by the OMS should include sexual health impacts alongside ostomy education.
During a Hartmann's Procedure for Hinchey IV diverticulitis, what pathological factors contribute to the high rate of permanent stomas (non-reversal)?
Show answer →Hinchey IV involves feculent peritonitis, causing massive woody edema and dense inflammation in the pelvis. The rectal stump often becomes scarred, shortened, or friable. Pathophysiology: Chronic pelvic fibrosis following severe sepsis makes subsequent mobilization of the stump for anastomosis technically hazardous, leading many surgeons to leave the end colostomy permanently.
For a patient with Short Bowel Syndrome (SBS) and a high-output stoma refractory to maximal anti-motility therapy, which 2026-standard pharmacological agent targets intestinal adaptation?
Show answer →Teduglutide (a GLP-2 analog). It enhances intestinal adaptation by increasing villus height and crypt depth, thereby increasing the absorptive surface area of the remaining small bowel. Exam Tip: GLP-2 analogs are indicated when HOS is due to SBS and the patient is dependent on parenteral support. It can reduce stomal output by significant volumes. Common distractor: Octreotide (used for secretory diarrhea, but not the primary choice for long-term SBS adaptation).
Histological examination of a biopsy from the active border of a Peristomal Pyoderma Gangrenosum lesion typically shows which predominant feature?
Show answer →A dense infiltration of neutrophils within the dermis (sterile neutrophilic dermatosis). Although not specific enough to be diagnostic alone, the presence of a neutrophilic abscess without evidence of vasculitis or significant pathogens supports the PG diagnosis. Clinical Pearl: The biopsy should be taken from the active, advancing border, not the necrotic center, to be most useful for excluding malignancy or infection.
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Try 30 free OMS cards firstThe full OMS deck contains 1020 flashcards, and 160 of them focus on pathology. This page shows 5 free samples.
Our OMS deck dedicates 160 of 1020 cards (16%) to pathology — always cross-check the official NAWCO exam outline for the current blueprint weighting.
Yes — the samples on this page are free, and the OMS preview page has 30 more free cards. Full access to all 1020 cards is a one-time $7.
Assessment
110 cards
Basics
60 cards
Diagnostics
20 cards
Management
400 cards
Physiology
100 cards
Procedures
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