An MCQ based case discussion by
Dr. Smitirupa Mishra , Consultant Pathologist, Sparsh Hospital , Bhubaneswar, Odisha

CASE HISTORY:
A 50-year-old male presents with pain abdomen and dyspepsia. Intraoperatively, appendicular perforation with psoas abscess is noted. Appendectomy specimen received for HPE

See below the Histopathology images based on which MCQs are framed.

Q1. Identify the organism seen in the appendiceal lumen in the given histopathology image:

A. Ascaris lumbricoides
B. Enterobius vermicularis
C. Taenia solium
D. Trichuris trichiura

Q2. The most characteristic microscopic feature of this organism is:

A. Barrel-shaped eggs with bipolar plugs
B. Radially striated eggs
C. Planoconvex (D-shaped) eggs
D. Operculated eggs

Q3. The most common clinical association of this organism is:

A. Hepatic abscess
B. Perianal pruritus
C. Hematuria
D. Myositis

Q4. The diagnostic test of choice for this infection in clinical practice is:

A. Stool examination
B. Blood smear
C. Scotch tape test
D. Urine microscopy

Q5. In appendectomy specimens, this organism is most often:

A. Always the primary cause of appendicitis
B. An incidental finding
C. Associated with malignancy
D. Seen only in immunocompromised patients

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6th April 2026 - The correct answers are:

Q1: B. Enterobius vermicularis
Explanation: Presence of planoconvex (D-shaped) eggs and slender nematode is characteristic of Enterobius vermicularis.

Q2: C. Planoconvex (D-shaped) eggs

Q3: B. Perianal pruritus

Q4: C. Scotch tape test

Q5: B. An incidental finding