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1. Which stain is most commonly used for routine Pap smears?
A. Hematoxylin and eosin
B. Papanicolaou
C. Giemsa
D. Wright
Rationale: The Papanicolaou stain is specifically designed for cervical
cytology. It highlights cellular details, nuclear morphology, and
cytoplasmic features, making it the gold standard for Pap smear
evaluation.
2. The Bethesda System for reporting cervical cytology includes all of
the following EXCEPT:
A. Negative for intraepithelial lesion or malignancy
B. Atypical squamous cells of undetermined significance
, C. High-grade squamous intraepithelial lesion
D. Endometrial carcinoma grade
Rationale: The Bethesda System focuses on cytologic findings, not
histologic grading of carcinoma. Endometrial carcinoma grading is a
histopathologic evaluation.
3. Koilocytosis is most commonly associated with:
A. Bacterial vaginosis
B. Human papillomavirus (HPV) infection
C. Herpes simplex virus infection
D. Candida infection
Rationale: Koilocytosis refers to squamous epithelial cells with
perinuclear halos and nuclear atypia, characteristic of HPV infection.
4. Which cellular feature is most indicative of malignancy in a Pap
smear?
A. Increased cytoplasm
B. High nuclear-to-cytoplasmic ratio
C. Small nucleoli
D. Presence of cilia
Rationale: Malignant cells typically exhibit a high nuclear-to-
cytoplasmic ratio, reflecting prominent nuclear enlargement relative to
the cytoplasm.
, 5. The term “ASC-US” in cytology reports stands for:
A. Atypical squamous cells, unusual specimen
B. Atypical squamous cells of undetermined significance
C. Abnormal squamous cells, unspecified
D. Atrophic squamous cells, uncertain
Rationale: ASC-US is a common Bethesda classification indicating
cellular changes that are not clearly benign or pre-malignant.
6. A 45-year-old patient has a Pap smear showing endocervical cells
with enlarged nuclei and hyperchromasia. The most appropriate
next step is:
A. Repeat Pap smear in 3 years
B. Immediate hysterectomy
C. Colposcopy with directed biopsy
D. Antibiotic therapy
Rationale: Nuclear enlargement and hyperchromasia are suspicious
findings; colposcopy allows direct visualization and biopsy of abnormal
areas.
7. Which of the following viruses is best detected by
immunocytochemistry in cervical smears?
A. Epstein-Barr virus
B. Adenovirus
, C. Human papillomavirus (HPV)
D. Cytomegalovirus
Rationale: Immunocytochemistry can detect HPV antigens in cervical
epithelial cells, supporting cytologic findings.
8. The most common cause of false-negative Pap smears is:
A. Poor staining
B. Sampling error
C. Overstaining
D. Inflammatory background
Rationale: Sampling error, where abnormal cells are not collected, is
the leading cause of false-negative cytology results.
9. What is the primary purpose of using a cytocentrifuge in body
fluid cytology?
A. Stain enhancement
B. Concentration of cells for better visualization
C. Removing red blood cells only
D. Creating a permanent slide
Rationale: Cytocentrifugation concentrates scant cells from fluids,
producing a monolayer suitable for microscopic evaluation.