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Soru

Zorluk: OrtaGastroenterology and Hepatology

Match each characteristic colonoscopic finding with the most likely corresponding clinical diagnosis.

  • Continuous, circumferential mucosal inflammation with friability and loss of vascular pattern starting at the anorectal vergeUlcerative colitis
  • Discontinuous inflammation with deep longitudinal ulcers, aphthous erosions, and a cobblestone appearanceCrohn disease
  • Raised, yellowish-white adherent mucosal plaques covering an erythematous and edematous baseClostridioides difficile infection
  • Diffuse dark brown pigmentation of the colonic mucosa with pale, unaffected lymphoid folliclesChronic anthraquinone laxative abuse
  • Discrete, flask-shaped ulcers with undermined edges and relatively healthy-appearing intervening mucosaEntamoeba histolytica infection

Cevap

The colonoscopic findings uniquely map to their classic etiologies: continuous friable mucosa to Ulcerative colitis, cobblestone/linear ulcers to Crohn disease, pseudomembranes to C. difficile, melanosis coli to laxative abuse, and flask-shaped ulcers to Entamoeba histolytica infection.
Each endoscopic description contains pathognomonic features that definitively link it to a specific gastrointestinal disorder. Continuous rectal involvement is the hallmark of Ulcerative colitis; skip lesions with deep ulcers define Crohn disease; pseudomembranes are highly specific for C. difficile; melanosis coli strongly suggests senna/anthraquinone laxative use; and flask-shaped ulcers are the classic finding in amebiasis.

Adım Adım Çözüm

1
Analyze the distribution of inflammation and depth of ulcers to differentiate inflammatory bowel diseases.
Continuous mucosal inflammation from the rectum matches Ulcerative colitis, while discontinuous deep ulcers match Crohn disease.
These are the core diagnostic endoscopic features that separate the two primary forms of IBD.
2
Identify pathognomonic mucosal deposits, exudates, or discolorations.
Yellowish plaques indicate pseudomembranes typical of C. difficile, whereas dark brown mucosal pigmentation indicates melanosis coli due to anthraquinone laxatives.
Visualizing these specific exudates or pigmentations directly suggests their respective infectious or toxic etiologies.
3
Correlate specific ulcer morphology with invasive parasitic infections.
Flask-shaped ulcers with normal intervening mucosa point toward an invasive protozoal infection, mapping to E. histolytica.
The parasite invades the crypts and spreads laterally within the submucosa, creating the classic flask shape on biopsy or endoscopy.

Anahtar Kavram

Endoscopic and colonoscopic findings in gastrointestinal pathologies
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Konular

Gastroenterology and Hepatology

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