Cytopathology — MCQs

Cytopathology Indian Medical PG Practice Questions and MCQs

Question 121: A woman on Pap smear shows disorganized growth of cells with hyperchromatic nuclei. Which phenomenon is occurring here?

A. Metaplasia
B. Hypertrophy
C. Carcinoma
D. Dysplasia (Correct Answer)

Explanation: ***Dysplasia*** - **Dysplasia** refers to disordered growth and maturation of cells, often characterized by **cellular pleomorphism**, **loss of architectural orientation**, **nuclear hyperchromatism**, and increased mitotic activity [1]. - In a Pap smear, these features are indicative of **precancerous changes** in the cervical epithelium, requiring further investigation [2]. *Metaplasia* - **Metaplasia** is the reversible replacement of one differentiated cell type with another, often in response to chronic irritation [2]. - While it can be a precursor to dysplasia, metaplasia itself involves mature, well-differentiated cells, not the **disorganized growth** and **hyperchromatic nuclei** described. *Hypertrophy* - **Hypertrophy** is an increase in the size of cells, leading to an increase in the size of the organ. - This process involves mature cells and does not include the characteristic **disorganized growth** or nuclear abnormalities seen in the question. *Carcinoma* - **Carcinoma** is a malignant tumor derived from epithelial cells, characterized by uncontrolled growth and invasion. - While the described changes could progress to carcinoma, the term carcinoma implies **frank malignancy** with invasive potential, whereas dysplasia refers to **precancerous changes** (CIN I, II, III) [2]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1007-1010. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Female Genital Tract Disease, pp. 467-468.

Question 122: An 18-year-old woman presents for follow-up of an abnormal Pap smear that revealed an abnormality suggestive of HPV infection. Which of the following was the likely cytopathologic finding?

A. Fibroids
B. Koilocytes (Correct Answer)
C. Donovan bodies
D. Clear cells

Explanation: ***Koilocytes*** - **Koilocytes** are **pathognomonic cellular changes** indicative of **HPV infection** on a Pap smear [1], [2] - These cells are characterized by an **enlarged nucleus**, often **hyperchromatic**, with a **perinuclear halo** (a clear zone around the nucleus) and cytoplasmic changes [1], [2] - This is the classic cytopathologic finding that confirms HPV infection in cervical cytology [2] *Fibroids* - **Uterine fibroids** are **benign smooth muscle tumors** of the uterus and are not detected by a Pap smear, which screens for cervical cellular abnormalities - They typically present with heavy menstrual bleeding, pelvic pressure, or pain, and are diagnosed via imaging like ultrasound - Fibroids are structural lesions, not cytopathologic findings *Donovan bodies* - **Donovan bodies** are intracellular inclusions found in macrophages and are diagnostic of **granuloma inguinale** (also known as donovanosis) - This is a bacterial sexually transmitted infection caused by *Klebsiella granulomatis* - Associated with genital ulcers and are not related to HPV infection or Pap smear findings *Clear cells* - **Clear cells** are a type of cell seen in specific **adenocarcinomas**, such as **clear cell carcinoma of the vagina or cervix**, which are rare - While these are malignant cells, their presence is not suggestive of HPV infection but rather a specific type of cancer - Clear cell carcinoma has historically been associated with in utero DES (diethylstilbestrol) exposure **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, p. 1010. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Female Genital Tract Disease, pp. 466-467.

Question 123: Which of the following statements regarding banding is TRUE?

A. It is a method of detecting single gene deletion
B. Fluorescent filters are used
C. Y-chromosome is seen in interphase
D. Trypsin and Giemsa are used (Correct Answer)

Explanation: ***Trypsin and Giemsa are used*** - **Banding techniques**, such as G-banding, involve treating chromosomes with **trypsin** to partially digest proteins, followed by **Giemsa staining** [1]. - This process creates a reproducible pattern of light and dark bands unique to each chromosome, allowing for cytogenetic analysis [2]. *It is a method of detecting single gene deletion* - **Banding** has a limited resolution (typically 3-5 Mb) and is generally **not suitable for detecting single gene deletions**, which are much smaller [1]. - Smaller deletions or **single gene anomalies** are usually identified using higher-resolution techniques like **FISH** or **molecular genetic testing**. *Fluorescent filters are used* - **Fluorescent filters** are primarily used in **fluorescence in situ hybridization (FISH)**, where fluorescent probes bind to specific DNA sequences. - Standard **banding techniques**, like G-banding, employ **light microscopy** and do not utilize fluorescent filters [2]. *Y-chromosome is seen in interphase* - While the **Y-chromosome** can be identified in interphase using **FISH with specific probes**, it is **not typically visualized in interphase by standard banding techniques**. - **Banding requires condensed chromosomes** during **metaphase** to resolve the characteristic band patterns [1], [2]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 54-55. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Genetic Disorders, pp. 167-168.

Question 124: Structure of chromosomes is studied by?

A. C-banding
B. Q-banding
C. BrdU staining
D. G-banding (Correct Answer)

Explanation: ***G-banding*** - G-banding is the most commonly used method for the **detailed examination of chromosomes**, allowing visualization of banding patterns [1][2]. - It facilitates the identification of **chromosomal abnormalities** and is essential in **cytogenetic studies** [1][2]. *Q-banding* - Q-banding reveals a different pattern that is primarily used for **detection of specific chromosome markers** but is less common than G-banding. - It is more useful for cases requiring **fluorescent bright bands** but not for overall structural analysis. *C-banding* - C-banding specifically highlights the **centromeric regions** of chromosomes, not the overall structure. - It is limited in scope compared to G-banding since it doesn't provide a complete picture of chromosome morphology. *Brd V-staining* - Brd V-staining focuses on specific **DNA regions** and is related to the **visualization of viral DNA** in infected cells rather than chromosome structure. - It does not offer insights into the **general structural characteristics** of chromosomes like G-banding does. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. (Basic Pathology) introduces the student to key general principles of pathology, both as a medical science and as a clinical activity with a vital role in patient care. Part 2 (Disease Mechanisms) provides fundamental knowledge about the cellular and molecular processes involved in diseases, providing the rationale for their treatment. Part 3 (Systematic Pathology) deals in detail with specific diseases, with emphasis on the clinically important aspects., pp. 54-55. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Genetic Disorders, pp. 167-168.

Question 125: What does a Tzanck smear in varicella-zoster virus infection typically show?

A. Acantholytic cells
B. Epidermal spongiosis
C. Multinucleated giant cells (Correct Answer)
D. Necrotic cells

Explanation: ***Multinucleated giant cells*** - A Tzanck smear identifies **multinucleated giant cells** with intranuclear inclusions, which are characteristic **cytopathic effects** of herpesviruses like VZV [1]. - These cells result from the fusion of infected keratinocytes, a hallmark finding in **herpes simplex** and **varicella-zoster infections** [1]. *Acantholytic cells* - Acantholytic cells are seen in conditions like **pemphigus vulgaris**, where there is loss of cell-to-cell adhesion between keratinocytes, leading to intraepidermal blistering. - While VZV can cause blistering, the primary cytological finding on Tzanck smear is not acantholysis but rather the presence of multinucleated cells. *Epidermal spongiosis* - Spongiosis refers to **intercellular edema** of epidermal cells, leading to widening of the intercellular spaces, typically seen in **eczematous dermatoses** [1]. - This finding is not specific to viral infections and does not represent the characteristic cytopathic effect of VZV on a Tzanck smear. *Necrotic cells* - Necrotic cells, or dead cells, are a general finding in many inflammatory and infectious processes where tissue damage occurs. - While VZV infection can lead to cell necrosis, the presence of isolated necrotic cells is not the specific, diagnostic feature for VZV on a Tzanck smear. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Infectious Diseases, pp. 366-367.

Question 126: A cervical Pap smear report stating that "koilocytic atypia is present" indicates the presence of:

A. Cytologic changes caused by herpes simplex virus (HSV)
B. Cytologic changes caused by human papillomavirus (HPV) (Correct Answer)
C. High-grade cervical intraepithelial neoplasia (CIN)
D. Cytologic changes caused by chlamydial infection

Explanation: ***Cytologic changes caused by human papillomavirus (HPV)*** - **Koilocytic atypia** is a characteristic cytopathic effect seen in cervical epithelial cells infected with **human papillomavirus (HPV)** [2]. - Koilocytes are squamous epithelial cells with **perinuclear halos** and nuclear changes such as enlargement, hyperchromasia, and irregular contours [2]. *High-grade cervical intraepithelial neoplasia (CIN)* - While HPV infection can lead to high-grade CIN, **koilocytic atypia** itself is typically associated with **low-grade squamous intraepithelial lesion (LSIL)**, which is often a precursor to CIN [1]. - High-grade CIN (CIN 2/3) involves more severe architectural disorganization and loss of cell maturation not solely defined by koilocytic atypia. *Cytologic changes caused by herpes simplex virus (HSV)* - HSV infection in a Pap smear would show characteristic changes like **multinucleated giant cells**, **nuclear molding**, and **intranuclear inclusions**, not koilocytic atypia [3]. - These findings are distinct from the perinuclear halo and nuclear irregularities seen in HPV infection. *Cytologic changes caused by chlamydial infection* - Chlamydial infections are bacterial and primarily cause signs of **inflammation**, such as an increased number of neutrophils and plasma cells, and reactive changes in epithelial cells. - **Chlamydia** does not induce koilocytic changes; these are specific to viral infections, particularly HPV. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1006-1008. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Female Genital Tract Disease, pp. 466-467. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Infectious Diseases, pp. 365-366.

Question 127: Which of the following statements is correct regarding the use of histopathological examination techniques for mass screening of endometrial cancer?

A. Fine Needle Aspiration Cytology (FNAC) is recommended for routine endometrial cancer screening
B. Histopathological examination techniques are not applicable for mass screening of endometrial cancer (Correct Answer)
C. Exfoliative cytology is suitable for mass screening of endometrial cancer
D. Brush cytology is the preferred method for mass screening of endometrial cancer

Explanation: ***Exfoliative cytology.*** - This technique is effective for **mass screening**, allowing for the collection of cells shed from the **surface of the uterine cervix** for examination [1]. - It has a critical role in detecting **cervical cancer** and precancerous changes efficiently [1]. *Brush cytology* - Primarily used for **direct sampling** of lesions, not specifically designed for mass screening. - More invasive and typically not suited for obtaining samples for histopathological examination in comparison to exfoliative techniques. *Not applicable* - This response does not provide a relevant diagnostic technique for uterine cancer screening. - It does not acknowledge the need for cytological evaluation in potential cases of uterine cancer. *FNAC* - Fine Needle Aspiration Cytology (FNAC) is generally used for **solid masses** rather than for screening purposes. - It is not the preferred method for early detection in the cervix, which requires exfoliative cytology [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1010-1011.

Practice by Chapter

Basic Principles of Cytopathology

Practice Questions

Specimen Collection and Processing

Practice Questions

Gynecologic Cytology

Practice Questions

Respiratory Tract Cytology

Practice Questions

Urinary Tract Cytology

Practice Questions

Effusion Cytology

Practice Questions

Fine Needle Aspiration Cytology

Practice Questions

Gastrointestinal Tract Cytology

Practice Questions

Ancillary Studies in Cytopathology

Practice Questions

Quality Assurance in Cytopathology

Practice Questions

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