Which of the following tumors is not derived from the meninges?
What is a Klatskin tumor?
Which of the following statements about desmoid tumors is incorrect?
Which tumor marker is most commonly associated with lung and breast carcinoma?
In which organ are corpora amylacea typically observed in a pathological context?
Glomus tumor is seen in -
In which condition is retinal astrocytoma commonly seen?
Orphan Annie nuclei are characteristic of which of the following?
Which of the following is the most likely proliferating breast mass?
ER positive status in carcinoma breast indicates?
NEET-PG 2012 - Pathology NEET-PG Practice Questions and MCQs
Question 41: Which of the following tumors is not derived from the meninges?
- A. Meningioma
- B. Hemangiopericytoma
- C. Schwannoma
- D. Hemangioblastoma (Correct Answer)
Explanation: ***Hemangioblastoma*** - This tumor is derived from **vascular endothelial cells and stromal cells**, not meningeal cells [1] - Typically found in the **cerebellum** and strongly associated with **von Hippel-Lindau disease** [1] - Has **no meningeal origin** and represents a distinct vascular neoplasm *Meningioma* - Derived from **arachnoidal cap cells** of the meninges [2] - Most common **benign primary intracranial tumor** arising from meningeal coverings [2] - Clearly of **meningeal origin** [3] *Schwannoma* - Originates from **Schwann cells** of peripheral nerve sheaths (neural crest origin) [4] - While not meningeal in origin, it commonly occurs **intracranially** affecting cranial nerves (especially CN VIII) [2] - Though also not meningeal, **hemangioblastoma is the better answer** as it's purely parenchymal/vascular, whereas schwannomas can have anatomic association with meninges [4] *Hemangiopericytoma* - Now classified as **solitary fibrous tumor/hemangiopericytoma** (WHO classification) - Arises from **meningeal pericytes** around blood vessels in the meninges - Despite mesenchymal origin, it is considered part of the **meningeal tumor spectrum** and has meningeal associations **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Manifestations Of Central And Peripheral Nervous System Disease, pp. 726-727. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Manifestations Of Central And Peripheral Nervous System Disease, pp. 727-728. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Central Nervous System, pp. 1316-1317. [4] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Peripheral Nerves and Skeletal Muscles, pp. 1248-1249.
Question 42: What is a Klatskin tumor?
- A. Fibrolamellar hepatocellular carcinoma
- B. Gall bladder carcinoma
- C. Hepatocellular carcinoma
- D. Hilar cholangiocarcinoma (Correct Answer)
Explanation: ***Nodular type of cholangiocarcinoma*** - Klatskin tumors are a specific form of **cholangiocarcinoma** occurring at the junction of the left and right hepatic bile ducts [1]. - These tumors are characterized by **biliary obstruction** and often present with **jaundice** as a prominent clinical feature. *Fibrolamellar hepatocellular carcinoma* - This is a variant of **hepatocellular carcinoma** known for its fibrous stroma, distinct from Klatskin tumors which arise from bile ducts. - **Fibrolamellar** is more common in younger patients and typically does not cause **biliary obstruction** characteristic of Klatskin tumors. *Gall bladder carcinoma* - Gall bladder carcinoma originates from the **gallbladder epithelium**, not the bile ducts, differentiating it from Klatskin tumors. - It may present with symptoms such as **abdominal pain** and **weight loss**, rather than the specific obstructive jaundice seen in Klatskin cases. *Hepatocellular carcinoma* - This cancer arises directly from hepatocytes and is unrelated to bile duct tumors like Klatskin tumors. - Commonly linked to **chronic liver disease** and liver cirrhosis, it does not typically present with **obstructive jaundice** as seen in cholangiocarcinomas [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 880-881.
Question 43: Which of the following statements about desmoid tumors is incorrect?
- A. Show infiltrative growth pattern
- B. Often seen below the umbilicus
- C. More common in women
- D. Highly radiosensitive (Correct Answer)
Explanation: ***Highly radiosensitive*** - This is the **INCORRECT** statement and hence the correct answer to this question. - Desmoid tumors are **radioresistant**, not radiosensitive, meaning they do not respond well to radiation therapy. - Radiation therapy is typically reserved for cases where surgery is not feasible or for local control after incomplete resection, but it is not highly effective as a standalone treatment. - The radioresistant nature is an important clinical characteristic that influences treatment planning. *Often seen below the umbilicus* - This statement is **correct** about desmoid tumors. - Desmoid tumors frequently arise from the **anterior abdominal wall**, with a common location being below the umbilicus, particularly in postpartum women. - Abdominal wall desmoids are strongly associated with **pregnancy** and trauma, and can be locally aggressive. *Show infiltrative growth pattern* - This statement is **correct** about desmoid tumors. [1] - Desmoid tumors are characterized by their **locally aggressive** and infiltrative growth pattern, often invading adjacent tissues like muscle, fascia, and neurovascular structures. [1] - This infiltrative nature makes complete surgical resection challenging and contributes to a high rate of **local recurrence** (up to 20-40% after surgery). - Despite their aggressive local behavior, desmoid tumors do not metastasize. *More common in women* - This statement is **correct** about desmoid tumors. - Desmoid tumors show a **female predominance**, particularly affecting women during their reproductive years (ages 25-40). - This gender predilection is linked to **hormonal influences**, with increased risk during **pregnancy** and the postpartum period. - The association with estrogen is further supported by occasional tumor regression after menopause. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Osteoarticular And Connective Tissue Disease, pp. 691-692.
Question 44: Which tumor marker is most commonly associated with lung and breast carcinoma?
- A. CEA (Correct Answer)
- B. hCG
- C. AFP
- D. CA-15-3
Explanation: ***CEA*** - **Carcinoembryonic antigen (CEA)** is a tumor marker commonly associated with **lung** and **breast cancers** [1]. - Elevated levels of CEA are often observed in **various malignancies**, making it useful for monitoring treatment response and recurrence. *CA-15-3* - While **CA-15-3** is a breast cancer marker, it is less specific than CEA and often used primarily for **monitoring** but not for initial diagnosis. - It is primarily elevated in **breast carcinoma**, not typically associated with **lung cancer**. *11CG* - This ppears to be incorrectly referenced and may not exist as a recognized tumor marker for lung or breast cancer. - There are no clinical associations with lung or breast cancer, making it irrelevant in this context. *AFP* - **Alpha-fetoprotein (AFP)** is primarily associated with **liver** and **germ cell tumors**, not commonly associated with lung or breast cancers [1]. - Elevated AFP levels do not correlate with lung or breast carcinomas, distinguishing it from CEA's relevance. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, p. 346.
Question 45: In which organ are corpora amylacea typically observed in a pathological context?
- A. Thymus
- B. Lymph node
- C. Spleen
- D. Prostate (Correct Answer)
Explanation: ***Prostate*** - **Corpora amylacea**, also known as prostatic concretions, are common, benign findings in the prostate gland, especially with increasing age. - They are composed of glycoproteins and often found within the **acini and ducts of the prostate**. *Thymus* - The thymus is known for **Hassall's corpuscles**, which are epithelial reticular cells arranged concentrically, playing a role in T-cell selection. - **Corpora amylacea** are not typically found in the normal thymus. *Lymph node* - Lymph nodes are characterized by their lymphoid follicles, germinal centers, and medullary cords. - While they can have various inclusions or changes in disease states, **corpora amylacea** are not a typical pathological finding in lymph nodes. *Spleen* - The spleen is primarily involved in filtering blood and immune responses, with distinct red and white pulp regions. - **Corpora amylacea** are not associated with the normal or pathological histology of the spleen.
Question 46: Glomus tumor is seen in -
- A. Rare locations such as retroperitoneum
- B. Long bones and vertebrae
- C. Proximal portion of digits (less common site)
- D. Distal portion of digits (Correct Answer)
Explanation: ***Distal portion of digits*** - **Glomus tumors** are most commonly found in the **distal extremities**, especially the **subungual region** (under the nail) of the fingers and toes. - This location accounts for over 75% of all glomus tumors, where they originate from specialized **neuromyoarterial glomus bodies** involved in thermoregulation. - The classic clinical triad includes **paroxysmal pain, point tenderness, and cold sensitivity**. *Rare locations such as retroperitoneum* - While glomus tumors can occur in unusual sites, the **retroperitoneum** is an exceptionally rare location for primary glomus tumors. - Extradigital glomus tumors account for approximately 25% of cases and can occur in various soft tissue sites. *Long bones and vertebrae* - Glomus tumors do not typically arise in **bone tissue** as they originate from glomus bodies in soft tissue. - Bone involvement, when present, is usually secondary due to pressure erosion from an adjacent soft tissue tumor rather than primary bone origin. *Proximal portion of digits (less common site)* - While glomus tumors can occasionally be found in less common digital locations, the **proximal portion of digits** is significantly less frequent than the distal, and particularly the subungual, region. - Their primary association remains with the **distal phalanx** and nail bed.
Question 47: In which condition is retinal astrocytoma commonly seen?
- A. Tuberous sclerosis (Correct Answer)
- B. Sturge weber syndrome
- C. Von Hippel-Lindau syndrome
- D. Neurofibromatosis
Explanation: ***Tuberous sclerosis*** - **Retinal astrocytoma**, also known as **retinal astrocytic hamartoma**, is a common ocular manifestation of **tuberous sclerosis complex (TSC)** [1]. - These lesions can appear as **mulberry-like nodules** or flat, whitish patches on the retina. - Found in approximately **40-50% of patients** with tuberous sclerosis. *Sturge weber syndrome* - Characterized by a **port-wine stain (facial nevus flammeus)**, **leptomeningeal angioma**, and **glaucoma**. - Ocular manifestations include **choroidal hemangiomas** and increased episcleral venous pressure. - Does not typically involve **retinal astrocytomas**. *Von Hippel-Lindau syndrome* - Associated with **retinal capillary hemangioblastomas** (vascular tumors) and various tumors in other organs like the kidneys, pancreas, and brain. - This condition involves **vascular tumors** in the retina, not astrocytic tumors. - Important differential as it also presents with retinal lesions. *Neurofibromatosis* - A neurocutaneous syndrome characterized by **café-au-lait spots**, **neurofibromas**, and **Lisch nodules** (iris hamartomas). - Ocular manifestations include **optic nerve gliomas** and iris hamartomas, but **not retinal astrocytomas**. - NF-1 is the most common neurocutaneous syndrome but has different retinal pathology. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Central Nervous System, pp. 1318-1319.
Question 48: Orphan Annie nuclei are characteristic of which of the following?
- A. Paraganglioma with Zellballen pattern
- B. Meningioma with psammoma bodies
- C. Pituitary adenoma with atypical nuclei
- D. Papillary thyroid carcinoma (Correct Answer)
Explanation: ***Papillary carcinoma thyroid***[1][2] - Characterized by **Orphan Annie nuclei**[1], which are large and round with a clear or empty appearance due to the presence of intranuclear cytoplasmic inclusions[1]. - Often associated with **thyroid follicular structures** and is the most common type of thyroid cancer[2]. *Meningioma* - Typically presents with **dural-based tumors** and does not exhibit Orphan Annie nuclei. - Histologically, it may demonstrate **whorled patterns** or calcifications instead. *Carcinoma pituitary* - Involves **adenomatous changes** in the pituitary gland but does not demonstrate the characteristic Orphan Annie nuclei. - More commonly shows **varied cellular morphology** depending on the type of secretory cells (e.g., prolactin, ACTH). *Paraganglioma* - Derived from **neuroendocrine cells**, and presents with **zellballen pattern** rather than Orphan Annie nuclei. - Often shows **chromaffin cells** and is typically associated with catecholamine secretion. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Endocrine System, p. 1099. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 429-430.
Question 49: Which of the following is the most likely proliferating breast mass?
- A. Duct ectasia
- B. Adenosis
- C. Papilloma
- D. Fibroadenoma (Correct Answer)
Explanation: **Fibroadenoma** - A **fibroadenoma** is a benign **biphasic breast tumor** composed of both glandular and stromal tissue, making it a common proliferating mass [3]. - It is often seen in **young women** and typically presents as a firm, movable, non-tender lump [3]. *Duct ectasia* - **Duct ectasia** is a non-proliferative condition characterized by dilation of the **subareolar ducts**, often with inflammation and fibrosis. - It is more commonly associated with **nipple discharge** and **periductal inflammation** rather than being a primary proliferating mass. *Adenosis* - **Adenosis** refers to an increase in the number of **glands or lobules** within the breast parenchyma, which can be sclerosing or florid [2]. - While it involves increased glandular elements, it is generally considered a **benign proliferative change** and less likely to form a distinct, palpable mass compared to a fibroadenoma [1], [4]. *Papilloma* - A **papilloma** is a benign epithelial proliferation within a **duct**, characterized by a central fibrovascular core [2]. - It commonly presents with **nipple discharge**, often bloody, and is typically a smaller lesion within the ductal system rather than a large, palpable proliferating mass [2]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1052-1054. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 446-447. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 448-449. [4] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, p. 1052.
Question 50: ER positive status in carcinoma breast indicates?
- A. Prognosis (Correct Answer)
- B. Etiology
- C. Site
- D. None of the options
Explanation: ***Prognosis*** - **ER positive status** in breast cancer indicates a better prognosis, as these tumors often respond well to hormone therapy [1][2]. - Patients with **ER positive** breast cancer usually have a lower risk of metastasis compared to **ER negative** tumors, making the outcome more favorable [1]. *Site* - ER status does not provide information regarding the **anatomical location** of the breast cancer, as it can be present in different sites of the breast. - It primarily focuses on the **biologic characteristics** of the tumor rather than its site of occurrence [1]. *None* - Selecting 'None' suggests that ER positive status has no relevance, which is incorrect as it is significant for treatment and prognosis [1]. - It is a crucial indicator for deciding on **endocrine therapy**, impacting management strategies in breast cancer patients [1]. *Etiology* - ER positive status does not directly indicate the **cause** of breast cancer, as various genetic and environmental factors contribute to its development. - It mainly reflects tumor behavior and response to therapies, not the **underlying factors** that lead to the disease [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, p. 1056. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1064-1066.