Cervical Pathology and Neoplasia — MCQs
Which condition does NOT increase the risk of cervical cancer?
Which HPV oncoprotein initiates cervical carcinogenesis primarily by inactivating the p53 tumor suppressor?
All are causes of prolapse of cervix EXCEPT:
A 16-year-old girl, not sexually active, came for vaccination against cervical cancer. Which vaccine should be given?
Lining epithelium of vagina is
A cervical Pap smear report stating that "koilocytic atypia is present" indicates the presence of:
Which statement is TRUE regarding the relationship between HPV vaccination and cervical cancer screening?
How do high-risk HPV types contribute to cervical carcinogenesis?
Absence of differentiation is known as:-
Anaplasia is
Cervical Pathology and Neoplasia Indian Medical PG Practice Questions and MCQs
Question 1: Which condition does NOT increase the risk of cervical cancer?
- A. Multiple sexual partners
- B. HPV infection
- C. Nulliparity (Correct Answer)
- D. Smoking
Explanation: ***Nulliparity*** - **Nulliparity** (never having given birth) is generally associated with a *reduced* risk of cervical cancer, or it has no significant impact. - Increased parity (multiple full-term pregnancies) is a risk factor, possibly due to hormonal changes or chronic inflammation. *Multiple sexual partners* - Having multiple sexual partners increases the risk of exposure to **Human Papillomavirus (HPV)**, the primary cause of cervical cancer. - Greater exposure to various HPV strains elevates the likelihood of persistent viral infection and subsequent cellular changes. *HPV infection* - **High-risk HPV strains** (e.g., HPV 16, 18) are the leading cause of cervical cancer, responsible for almost all cases. - Persistent infection with these oncogenic HPV types leads to progressive cervical dysplasia and, eventually, invasive cancer. *Smoking* - Smoking is an independent risk factor for cervical cancer, even after accounting for HPV infection. - Chemicals in tobacco smoke can reach the cervical mucus and damage DNA, impairing the immune system's ability to clear HPV infections.
Question 2: Which HPV oncoprotein initiates cervical carcinogenesis primarily by inactivating the p53 tumor suppressor?
- A. E3
- B. E5
- C. E6 (Correct Answer)
- D. E7
Explanation: ***E6*** - **E6 oncoprotein is the HPV protein that specifically targets and degrades p53** through ubiquitin-mediated proteolysis [2]. - **p53 degradation** prevents apoptosis and allows cells with damaged DNA to survive and proliferate, a critical early step in malignant transformation [3]. - E6 works synergistically with E7 in cervical carcinogenesis, but **E6 is uniquely responsible for p53 inactivation** [1]. *E3* - HPV does not have a clinically significant E3 oncoprotein in the context of cervical cancer pathogenesis. - This is not a major viral oncoprotein involved in malignant transformation. *E5* - **E5 oncoprotein** plays a minor role in early infection by enhancing growth factor receptor signaling. - It does **not target p53** and is often lost during viral integration, making it less critical for malignant progression. *E7* - **E7 oncoprotein targets the retinoblastoma protein (Rb)**, not p53 [1]. - Rb inactivation releases E2F transcription factors, driving cell cycle progression [1]. - E7 and E6 work together, but **E7's specific target is Rb, not p53** [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 334-335. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1006-1007. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 303-304.
Question 3: All are causes of prolapse of cervix EXCEPT:
- A. Menopause
- B. Chronic cough
- C. Delivery of a big baby
- D. Regular exercise (Correct Answer)
Explanation: ***Regular exercise*** - **Regular exercise**, especially core-strengthening exercises, can actually help prevent pelvic organ prolapse by strengthening the **pelvic floor muscles**. - It does not contribute to the weakening of support structures necessary for cervical prolapse. *Menopause* - **Estrogen deficiency** during menopause leads to the thinning and weakening of **pelvic connective tissues** and muscles. - This loss of tissue elasticity and strength renders the pelvic organs more susceptible to prolapse. *Chronic cough* - A **chronic cough** significantly increases **intra-abdominal pressure** repeatedly. - This sustained downward force can strain and weaken the **pelvic floor muscles** and ligaments over time, contributing to prolapse. *Delivery of a big baby* - The **vaginal delivery** of a large baby can cause significant **trauma** and stretching to the **pelvic floor muscles**, ligaments, and fascia. - This physical damage can compromise the structural integrity supporting the cervix and other pelvic organs, increasing the risk of prolapse.
Question 4: A 16-year-old girl, not sexually active, came for vaccination against cervical cancer. Which vaccine should be given?
- A. Gardasil (Correct Answer)
- B. Biovac
- C. Rubavac
- D. Tdap
Explanation: ***Gardasil*** - **Gardasil** is a **quadrivalent HPV vaccine** approved for the prevention of **cervical cancer** caused by HPV types 6, 11, 16, and 18 - It is recommended for adolescents, typically between ages **9-14 years**, ideally before potential exposure to HPV through sexual activity - **For a 16-year-old not sexually active**, Gardasil is the appropriate choice among the given options for cervical cancer prevention - The vaccine provides protection against both high-risk oncogenic HPV types (16, 18) and low-risk types (6, 11) that cause genital warts *Biovac* - **Biovac** is not a recognized or widely used vaccine for cervical cancer prevention - This option serves as a distractor without specific medical vaccine correlation in the context of HPV immunization *Rubavac* - **Rubavac** is a vaccine specifically designed to protect against the **rubella virus** (German measles) - It is part of routine childhood immunization, usually given as part of the **MMR vaccine (measles, mumps, rubella)** - Has no role in cervical cancer prevention *Tdap* - **Tdap** is a combination vaccine that protects against **tetanus, diphtheria, and pertussis (whooping cough)** - Given as a booster for adolescents and adults to maintain immunity against these bacterial infections - Has no role in cervical cancer prevention
Question 5: Lining epithelium of vagina is
- A. Squamous epithelium (Correct Answer)
- B. Columnar epithelium
- C. Transitional epithelium
- D. Secretory epithelium
Explanation: Squamous epithelium * The vagina is lined by stratified squamous non-keratinized epithelium [1], providing a protective barrier against friction and pathogens. * This type of epithelium is well-suited for areas subject to significant mechanical stress, such as during intercourse and childbirth. Columnar epithelium * Columnar epithelium [2] is typically found in areas specialized for secretion and absorption, such as the gastrointestinal tract and glandular linings. * It would not offer the necessary protective qualities for the vaginal environment. Transitional epithelium * Transitional epithelium is a specialized stratified epithelium found in the urinary tract, capable of stretching and distending. * It is not found in the vagina, which requires a more robust, friction-resistant lining. Secretory epithelium * While the cervix has secretory glands, the lining of the vagina itself is not primarily secretory. * The primary role of the vaginal lining is protection, not secretion, and its cells do not typically produce a large amount of substances.
Question 6: 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 7: Which statement is TRUE regarding the relationship between HPV vaccination and cervical cancer screening?
- A. Vaccinated women require less frequent screening than unvaccinated women
- B. Screening recommendations are currently the same regardless of vaccination status (Correct Answer)
- C. HPV vaccination eliminates the need for cervical cancer screening
- D. Screening should begin at a younger age in vaccinated women
Explanation: ***Screening recommendations are currently the same regardless of vaccination status*** * Current guidelines recommend the same cervical cancer screening schedule for all eligible individuals, **regardless of their HPV vaccination status**. * This is because the HPV vaccine does not protect against all oncogenic HPV types, and individuals may have been exposed to HPV prior to vaccination. *Vaccinated women require less frequent screening than unvaccinated women* * This statement is incorrect because there is **no evidence to support less frequent screening** for vaccinated women. * The persistence of **high-risk HPV types not covered by the vaccine** and the possibility of prior exposure necessitate consistent screening. *HPV vaccination eliminates the need for cervical cancer screening* * This is incorrect; HPV vaccination significantly reduces the risk of cervical cancer but **does not eliminate it completely**. * Vaccines protect against the most common high-risk HPV types but **not all of them**, making continued screening essential. *Screening should begin at a younger age in vaccinated women* * This is incorrect; current guidelines recommend the **same starting age for cervical cancer screening** (typically 21 or 25, depending on the guideline) for both vaccinated and unvaccinated women. * There is **no clinical rationale to initiate screening earlier** in vaccinated individuals.
Question 8: How do high-risk HPV types contribute to cervical carcinogenesis?
- A. By integration into host genome and expression of E6/E7 oncoproteins (Correct Answer)
- B. Through direct mutagenic effects on host DNA
- C. Through chronic inflammation and oxidative damage
- D. By inducing apoptosis resistance through capsid proteins
Explanation: ***By integration into host genome and expression of E6/E7 oncoproteins*** - High-risk HPV types integrate their **viral DNA** into the host cell's genome, leading to the sustained expression of the **E6 and E7 oncoproteins** [1]. - **E6 targets p53** for degradation, impairing apoptosis, while **E7 targets Rb**, disrupting cell cycle control and promoting uncontrolled cell proliferation [1]. *Through direct mutagenic effects on host DNA* - HPV itself does not directly cause mutations through its own enzymatic activity on host DNA. - Its oncogenic potential stems from the **disruption of host cell regulatory proteins** rather than direct DNA alteration [1]. *Through chronic inflammation and oxidative damage* - While chronic inflammation can contribute to carcinogenesis, it is not the primary or sole mechanism by which high-risk HPV types induce cervical cancer. - HPV-mediated carcinogenesis is more specifically linked to the **oncoprotein activity** that overrides cellular tumor suppressor pathways [2]. *By inducing apoptosis resistance through capsid proteins* - HPV **capsid proteins (L1 and L2)** are primarily involved in viral assembly and entry, not in inducing apoptosis resistance. - The **E6 oncoprotein** is responsible for inactivating **p53** and conferring apoptosis resistance [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 334-335. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1007-1008.
Question 9: Absence of differentiation is known as:-
- A. Dysplasia
- B. Anaplasia (Correct Answer)
- C. Metaplasia
- D. Hyperplasia
Explanation: ***Anaplasia*** - **Anaplasia** refers to the **lack of differentiation** in cells, meaning they lose the morphological and functional characteristics of mature cells [1]. - It is a hallmark of **malignancy** and often associated with aggressive tumors. - Key features include pleomorphism, abnormal nuclear morphology, increased mitotic activity, and loss of polarity [2]. *Dysplasia* - **Dysplasia** involves **disordered growth** and maturation of cells, often characterized by pleomorphism, loss of polarity, and increased mitotic figures. - While it can be a precursor to cancer, it represents an **abnormal development** rather than a complete absence of differentiation [3]. - Dysplastic cells retain some degree of differentiation but show architectural and cytological abnormalities. *Metaplasia* - **Metaplasia** is the **reversible change** of one adult differentiated cell type to another adult differentiated cell type [3]. - This adaptation usually occurs in response to chronic irritation or stress, for example, columnar to squamous epithelium in the respiratory tract of smokers. - Both cell types involved are fully differentiated, just different types. *Hyperplasia* - **Hyperplasia** is an **increase in the number of cells** in an organ or tissue, leading to increased volume [4]. - This is an adaptive response to stimuli, such as hormonal stimulation (e.g., endometrial hyperplasia) or increased functional demand. - The cells remain well-differentiated and maintain normal architecture. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 276-278. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, p. 278. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 278-280. [4] 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. 85-87.
Question 10: Anaplasia is
- A. Changing one type of epithelium to another
- B. Nuclear chromatin
- C. Lack of differentiation (Correct Answer)
- D. Morphological changes
Explanation: ***Lack of differentiation*** - Anaplasia refers to a **loss of differentiation** in cells, making them more primitive and less specialized [1]. - It is often seen in **malignant tumors**, indicating a poor prognosis and aggressive behavior [1]. *Morphological changes* - While anaplasia involves **morphological changes**, this term is too broad and can relate to various cellular alterations, not exclusively anaplasia [1]. - Anaplasia specifically emphasizes **lack of differentiation**, distinct from general changes in cell appearance [1]. *Changing one type of epithelium to another* - This describes a process known as **metaplasia**, where one adult cell type transforms into another, not anaplasia. - Anaplasia signifies a **de-differentiation** rather than a change to a different epithelial type [1]. *Nuclear chromatin* - While changes in **nuclear chromatin** can occur in anaplastic cells, this does not define anaplasia itself [1]. - Anaplasia primarily refers to **loss of cell differentiation**, making this option insufficient to describe the concept [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 276-280.
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