PAP PAP Cytology Interpretation and Reporting 1 — Questions and Answers
Question 1: What classification system is currently used to report Pap test results in the United States?
- Papanicolaou Numerical Class System
- The Bethesda System (TBS) (Correct answer)
- WHO Cervical Classification
- CIN Histologic Grading Scale
Correct answer: The Bethesda System (TBS)
The Bethesda System (TBS), last updated in 2014, is the standard reporting framework for cervicovaginal cytology in the United States.
Question 2: What does the abbreviation 'ASCUS' stand for in Pap test reporting?
- Atypical Squamous Cells of Unknown Significance
- Atypical Squamous Cells of Undetermined Significance (Correct answer)
- Abnormal Squamous Cell Under Study
- Advanced Squamous Cell Unusual Sample
Correct answer: Atypical Squamous Cells of Undetermined Significance
ASCUS stands for Atypical Squamous Cells of Undetermined Significance, indicating squamous cells with changes that do not meet criteria for a squamous intraepithelial lesion.
Question 3: Which Pap result carries the highest risk for high-grade dysplasia or cancer and requires immediate colposcopy?
- ASCUS
- LSIL
- ASC-H
- HSIL (Correct answer)
Correct answer: HSIL
HSIL (High-grade Squamous Intraepithelial Lesion) carries the highest risk for CIN 2/3 or invasive carcinoma and mandates prompt colposcopic evaluation.
Question 4: What is the clinical significance of finding endometrial cells on a Pap test in a woman aged 45 or older?
- It is always a normal expected finding at any age
- It may indicate endometrial pathology and warrants further evaluation (Correct answer)
- It confirms adequate transformation zone sampling
- It only indicates the test was performed during active menstruation
Correct answer: It may indicate endometrial pathology and warrants further evaluation
Endometrial cells in women 45 years or older may suggest endometrial hyperplasia or carcinoma and require clinical correlation and possible endometrial biopsy.
Question 5: What does 'LSIL' represent in the Bethesda System?
- Low-grade Squamous Intraepithelial Lesion (Correct answer)
- Large Squamous Intracellular Lesion
- Low Squamous Inflammatory Level
- Lateral Squamous Intraepithelial Lining
Correct answer: Low-grade Squamous Intraepithelial Lesion
LSIL (Low-grade Squamous Intraepithelial Lesion) encompasses HPV cytopathic effect and mild dysplasia, corresponding to the former CIN 1 histologic category.
Question 6: Which cytologic finding on a Pap test is the hallmark of HPV infection?
- Koilocytes (Correct answer)
- Parabasal cells
- Histiocytes
- Normal endocervical cells
Correct answer: Koilocytes
Koilocytes — squamous cells displaying perinuclear halos with enlarged, irregular, hyperchromatic nuclei — are the cytopathic hallmark of HPV infection.
PAP PAP Cytology Interpretation and Reporting 1
What classification system is currently used to report Pap test results in the United States?