Cytopathology Practice Questions

Q: What is the term for a swollen degenerating epithelial cell that results from acantholysis?

Tzanck cell. ### Explanation **Correct Answer: B. Tzanck cell** **Mechanism and Concept:** A **Tzanck cell** is a rounded, degenerating keratinocyte found in the epidermis. It results from **acantholysis**, a process where the intercellular bridges (desmosomes) between squamous epithelial cells are lost [1]. When these connections break, the cells lose their characteristic polygonal shape, detach from one another, and become rounded or "swollen." Cytologically, these cells often exhibit an enlarged nucleus, perinuclear halo, and condensed peripheral cytoplasm. This is a hallmark finding in **Pemphigus vulgaris** and viral infections like **Herpes Simplex (HSV)** and **Varicella-Zoster (VZV)** [1]. **Analysis of Incorrect Options:** * **A. Anitschow cell:** These are "caterpillar cells" (modified macrophages) seen in the heart during **Acute Rheumatic Fever** (Aschoff bodies), not epithelial cells. * **C. Ghost cell:** These are dead cells that retain their cellular outline but have lost their nucleus (karyolysis). They are typically seen in **Coagulative Necrosis** or specific tumors like Pilomatricoma and Craniopharyngioma. * **D. Prickle cell:** This is a normal anatomical term for cells in the *Stratum Spinosum* layer of the skin, named for the "prickly" appearance of their intact desmosomes. They are not degenerating or acantholytic. **High-Yield NEET-PG Pearls:** * **Tzanck Smear:** A rapid bedside diagnostic test where a blister base is scraped to look for these cells. * **Multinucleation:** In viral infections (HSV/VZV), Tzanck cells characteristically show **multinucleation, nuclear molding, and chromatin margination**. * **Pemphigus vs. Pemphigoid:** Tzanck cells are seen in Pemphigus (intraepidermal/acantholytic) but are **absent** in Bullous Pemphigoid (subepidermal/non-acantholytic) [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Skin, pp. 1170-1172.

Q: Vaginal cytology for hormonal assessment is best obtained from which location?

Lateral wall. **Explanation:** In gynecological cytopathology, the site of sample collection is determined by the clinical objective. For **hormonal assessment** (Cytohormonal Evaluation), the **upper third of the lateral vaginal wall** is the ideal site. **Why the Lateral Wall?** The epithelium of the lateral vaginal wall is highly sensitive to circulating steroid hormones (estrogen and progesterone). Unlike the cervix or the posterior fornix, this area is relatively free from inflammatory exudates, cervical mucus, and debris. This ensures that the cells collected (superficial, intermediate, or parabasal) accurately reflect the patient’s hormonal status, allowing for the calculation of the **Maturation Index (MI)**. **Analysis of Incorrect Options:** * **Posterior wall (and Posterior Fornix):** This is the site for the "Pool Sample." While it is excellent for detecting endometrial or ovarian adenocarcinoma cells that gravitate there, it is unsuitable for hormonal studies because the cells are often partially autolyzed or contaminated by vaginal flora and debris. * **Anterior wall:** This site is not standard for hormonal evaluation as it lacks the consistent epithelial thickness and accessibility found in the lateral wall. * **Any wall:** Hormonal assessment requires a standardized site to ensure reproducibility and accuracy; therefore, random sampling is incorrect. **Clinical Pearls for NEET-PG:** * **Maturation Index (MI):** Expressed as a ratio of Parabasal : Intermediate : Superficial cells. * **Estrogen Effect:** Causes maturation into **Superficial cells** (high MI shift to the right). * **Progesterone Effect:** Causes maturation into **Intermediate cells** (shift to the middle). * **Contraindication:** Cytohormonal evaluation cannot be performed in the presence of local infection (e.g., Trichomoniasis or Candidiasis) as inflammation alters the maturation pattern.

Q: What is the maturation index in the mid-secretory phase of the menstrual cycle?

0/70/30. **Explanation:** The **Maturation Index (MI)** is a cytohormonal evaluation used to assess the hormonal status of a patient by calculating the percentage of three types of squamous cells in a lateral vaginal wall smear: **Parabasal cells / Intermediate cells / Superficial cells.** **1. Why 0/70/30 is correct:** The **mid-secretory phase** (post-ovulatory) is dominated by **Progesterone**. Progesterone promotes the maturation of squamous epithelium only up to the **intermediate cell layer** [1]. This results in a "shift to the middle," characterized by a high percentage of intermediate cells and a decrease in superficial cells. A typical MI for this phase is approximately 0/70/30, reflecting the progestational effect. **2. Analysis of Incorrect Options:** * **0/95/5 (Options A & D):** This represents a profound Progesterone effect or "Intermediate cell dominance." This is typically seen in **pregnancy** or the late luteal phase, rather than the mid-secretory phase. * **80/20/0 (Option B):** This shows a "shift to the left" with a dominance of **Parabasal cells**. This is characteristic of **Atrophic vaginitis** or the post-menopausal state where estrogen and progesterone levels are very low. **3. NEET-PG High-Yield Pearls:** * **Estrogen Effect:** Causes maturation to the **Superficial cell** layer (e.g., 0/15/85 at ovulation). * **Progesterone Effect:** Causes maturation to the **Intermediate cell** layer (e.g., Pregnancy, Secretory phase) [1]. * **Navicular Cells:** These are boat-shaped intermediate cells filled with glycogen, commonly seen in the smears of pregnant women due to high progesterone. * **Fern Test:** Positive (ferning) in the Estrogen-dominant follicular phase; Negative in the Progesterone-dominant secretory phase [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1011-1013.

Question 1

A Pap smear from a 30-year-old woman demonstrates protozoal parasites. What are these organisms most likely to be?

Accepted Answer

Trichomonas vaginalis

Answer

Cryptosporidium parvum

Answer

Entamoeba histolytica

Answer

Giardia lamblia

Question 2

What is the term for a swollen degenerating epithelial cell that results from acantholysis?

Accepted Answer

Tzanck cell

Answer

Anitschow cell

Answer

Ghost cell

Answer

Prickle cell

Question 3

Which brain tumour is characterized by high vascularity?

Accepted Answer

Glioblastoma

Answer

Meningiomas

Answer

CP angle epidermoid

Answer

Pituitary adenoma

Question 4

Stem cells are located in which of the following locations in the body?

Accepted Answer

Intestine

Answer

Retina

Answer

Endometrium

Answer

Choana

Question 5

What is the most common tumor diagnosed in a female patient with tuberous sclerosis?

Accepted Answer

Renal Angiomyolipoma

Answer

Rhabdomyosarcoma

Answer

Pulmonary lymphangioleiomyomatosis

Answer

Optic glioma

Question 6

Vaginal cytology for hormonal assessment is best obtained from which location?

Accepted Answer

Lateral wall

Answer

Posterior wall

Answer

Anterior wall

Answer

Any wall

Question 7

Which of the following is a marker of bone resorption?

Accepted Answer

C-telopeptide

Answer

Alkaline phosphatase

Answer

Procollagen 1 N propeptide

Answer

Osteocalcin

Question 8

Arrange the following heme degradation products in the order of their production:

Accepted Answer

Protoporphyrin, Biliverdin, Bilirubin, Urobilinogen

Answer

Protoporphyrin, Bilirubin, Biliverdin, Urobilinogen

Answer

Urobilinogen, Biliverdin, Bilirubin, Protoporphyrin

Answer

Urobilinogen, Bilirubin, Biliverdin, Protoporphyrin

Question 9

Which of the following pathological findings does NOT indicate a malignant phyllodes tumor?

Accepted Answer

Fibrosarcoma

Answer

Liposarcoma

Answer

Rhabdomyosarcoma

Answer

None of the above

Question 10

What is the maturation index in the mid-secretory phase of the menstrual cycle?

Accepted Answer

0/70/30

Answer

0/95/5

Answer

80/20/0

Answer

0/95/5

Cytopathology — MCQs

Cytopathology — MCQs

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