Neoplasia — MCQs
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All of the following are examples of tumor markers, except?
A 61-year-old man with a history of chronic viral hepatitis has noted a 6-kg weight loss over the past 5 months. Physical examination shows no masses or palpable lymphadenopathy. An abdominal CT scan shows a nodular liver with a 10-cm mass in the right lobe. A stool guaiac test result is negative. An elevation in which of the following laboratory tests is most likely to be present in this man?
Which of the following is not a recognized etiology of Kaposi sarcoma?
Which of the following is least likely to regress spontaneously?
Which of the following lesions is described as destructively invasive and locally malignant with rare metastasis?
HER-2/neu gene amplification causes breast carcinoma due to:
Retinoblastoma is associated with which of the following conditions?
Which of the following is a component of the Carney triad?
Which of the following statements is NOT true regarding Ameloblastoma?
What is the most suggestive sign or symptom of metastatic disease?
Neoplasia Indian Medical PG Practice Questions and MCQs
Question 531: All of the following are examples of tumor markers, except?
- A. Alpha-HCG (a-HCG) (Correct Answer)
- B. Alpha-Feto protein
- C. Thyroglobulin
- D. b2-microglobulin
Explanation: ### Explanation **1. Why Alpha-HCG (a-HCG) is the correct answer:** Human Chorionic Gonadotropin (HCG) is a glycoprotein hormone consisting of two subunits: **alpha (α)** and **beta (β)**. The α-subunit is identical to those found in LH, FSH, and TSH. Because it lacks specificity, α-HCG is **not** used as a tumor marker. In clinical practice and oncology, the **Beta-subunit (β-HCG)** is the specific tumor marker used to monitor conditions like Gestational Trophoblastic Disease (Hydatidiform mole/Choriocarcinoma) and Germ Cell Tumors (Seminoma/Non-seminomatous tumors) [1]. **2. Analysis of Incorrect Options:** * **Alpha-Fetoprotein (AFP):** A high-yield marker produced by the fetal yolk sac and liver. It is a classic marker for **Hepatocellular Carcinoma (HCC)** and **Non-seminomatous germ cell tumors** (specifically Yolk Sac Tumors) [2]. * **Thyroglobulin:** Produced by follicular cells of the thyroid. It is used as a highly specific marker to detect recurrence or metastasis in **Papillary and Follicular Thyroid Carcinomas** after total thyroidectomy. * **β2-microglobulin:** A component of MHC Class I molecules. It serves as a prognostic marker for hematological malignancies, most notably **Multiple Myeloma** and certain Lymphomas. **3. NEET-PG High-Yield Pearls:** * **Most specific marker for Pancreatic Cancer:** CA 19-9. * **Marker for Medullary Carcinoma of Thyroid:** Calcitonin. * **Marker for Ovarian Cancer:** CA-125 (Surface epithelial tumors). * **Prostate Cancer:** PSA (Prostate Specific Antigen) is organ-specific but not cancer-specific (can rise in BPH/Prostatitis) [2]. * **Oncofetal Antigens:** Include AFP and CEA (Carcinoembryonic Antigen) [2]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Female Genital Tract, pp. 1035-1036. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, p. 346.
Question 532: A 61-year-old man with a history of chronic viral hepatitis has noted a 6-kg weight loss over the past 5 months. Physical examination shows no masses or palpable lymphadenopathy. An abdominal CT scan shows a nodular liver with a 10-cm mass in the right lobe. A stool guaiac test result is negative. An elevation in which of the following laboratory tests is most likely to be present in this man?
- A. Alpha-fetoprotein (Correct Answer)
- B. CA-19-9
- C. Calcitonin
- D. Carcinoembryonic antigen
Explanation: **Explanation:** The clinical presentation of a 61-year-old male with **chronic viral hepatitis** [2] (a major risk factor), significant weight loss, and a large solitary mass (10 cm) [1] in a nodular (cirrhotic) liver is highly suggestive of **Hepatocellular Carcinoma (HCC)**. **1. Why Alpha-fetoprotein (AFP) is correct:** AFP is the most specific serum tumor marker for HCC [1]. It is an oncofetal antigen normally synthesized by the fetal yolk sac and liver. In adults, pathological elevation (>400 ng/mL) in the setting of a liver mass is diagnostic [1]. Chronic hepatitis B or C infection leads to cirrhosis [2], which provides the proliferative environment for malignant transformation into HCC. **2. Why the other options are incorrect:** * **CA-19-9:** This is primarily a marker for **pancreatic adenocarcinoma** and **cholangiocarcinoma**. While it can be elevated in biliary tract diseases, the history of hepatitis and a large parenchymal mass points more strongly toward HCC. * **Calcitonin:** This is the specific marker for **Medullary Thyroid Carcinoma**, produced by the parafollicular C-cells. It has no association with primary liver malignancy. * **Carcinoembryonic Antigen (CEA):** CEA is most commonly elevated in **colorectal carcinoma**. While the liver is a common site for colorectal metastasis, the negative stool guaiac test (no occult blood) and the history of chronic hepatitis make a primary liver tumor (HCC) more likely than a secondary one. **Clinical Pearls for NEET-PG:** * **HCC Screening:** High-risk patients (cirrhosis/HBV) should be screened every 6 months using **Ultrasound + AFP** [1]. * **Radiology:** HCC shows a characteristic "wash-in" (arterial phase enhancement) and "wash-out" (venous phase) on triple-phase CT. * **Fibrolamellar Variant:** A subtype of HCC seen in young adults without cirrhosis; it typically has a **normal AFP** and a better prognosis. * **Other AFP associations:** Yolk sac tumors (Endodermal sinus tumors) and Neural tube defects (elevated in maternal serum). **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 399-400. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Liver and Gallbladder, pp. 876-879.
Question 533: Which of the following is not a recognized etiology of Kaposi sarcoma?
- A. High-dose radiation
- B. Human herpes virus-8 (HHV-8)
- C. HIV
- D. Hereditary (Correct Answer)
Explanation: **Explanation:** Kaposi Sarcoma (KS) is a vascular neoplasm caused by the proliferation of spindle cells. The primary driver of all forms of KS is **Human Herpesvirus-8 (HHV-8)**, also known as Kaposi Sarcoma-associated Herpesvirus (KSHV) [1]. **Why "Hereditary" is the correct answer:** Kaposi Sarcoma is **not a hereditary or genetic disorder**. It is an acquired angioproliferative disease. While there are four distinct clinical variants (Classic, Endemic/African, Iatrogenic/Transplant-associated, and AIDS-associated), none are passed down through germline mutations. **Analysis of Incorrect Options:** * **HHV-8 (Option B):** This is the essential causative agent found in nearly all KS lesions [1]. It encodes viral homologs of cellular genes (like cyclin D1) that drive cell proliferation and inhibit apoptosis. * **HIV (Option C):** AIDS-associated KS is the most common and aggressive form [1]. HIV acts as a potent cofactor; the resulting immunosuppression and specific HIV-Tat proteins promote HHV-8 replication and spindle cell growth. * **High-dose radiation (Option A):** While rare, chronic lymphedema (which can be a sequel of radiation therapy) is a known risk factor for various vascular sarcomas, and radiation itself has been documented as a potential trigger for localized KS in predisposed individuals. **NEET-PG High-Yield Pearls:** * **Histology:** Characterized by "slit-like" vascular spaces containing extravasated RBCs and spindle-shaped cells. * **Classic Variant:** Typically affects elderly men of Mediterranean or Eastern European descent; usually remains localized to the skin of lower extremities. * **AIDS-associated:** Most common HIV-related malignancy; often involves viscera and mucous membranes [1]. * **Treatment:** Highly Active Antiretroviral Therapy (HAART) often leads to regression in HIV-positive patients. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Diseases of the Immune System, pp. 261-262.
Question 534: Which of the following is least likely to regress spontaneously?
- A. Osteosarcoma (Correct Answer)
- B. Retinoblastoma
- C. Choriocarcinoma
- D. Malignant melanoma
Explanation: The phenomenon of **spontaneous regression** refers to the partial or complete disappearance of a malignant tumor in the absence of specific treatment. This is typically mediated by the host's immune response (T-cell mediated cytotoxicity) or the induction of differentiation and apoptosis. **1. Why Osteosarcoma is the Correct Answer:** Osteosarcoma is a highly aggressive primary bone malignancy characterized by the production of osteoid [2], [3]. Unlike the other options, it lacks a significant documented history of spontaneous regression. It is an immunologically "cold" or less responsive tumor compared to melanoma or germ cell tumors, and its progression is typically relentless without surgical and chemotherapeutic intervention [3]. **2. Analysis of Other Options:** * **Retinoblastoma:** Known to undergo spontaneous regression (though rare), often resulting in a "retinocytoma." [1] This is usually due to the tumor outgrowing its blood supply or undergoing massive apoptosis. * **Choriocarcinoma:** This is a unique gestational trophoblastic neoplasm. Because it is derived from paternal antigens, it is highly immunogenic. The maternal immune system can occasionally recognize and eliminate the primary tumor (often in the uterus), even if metastases persist. * **Malignant Melanoma:** This is the classic example of an immunogenic tumor. Spontaneous regression is well-documented and is often marked clinically by areas of depigmentation (vitiligo-like halos) due to T-cell infiltration. **Clinical Pearls for NEET-PG:** * **Most common tumor to undergo spontaneous regression:** Neuroblastoma (especially Stage 4S in infants). * **Other tumors prone to regression:** Renal cell carcinoma (especially the primary tumor after nephrectomy) and Lymphomas. * **Mechanism:** Spontaneous regression is most frequently linked to **immune surveillance** and **cytokine-mediated** pathways. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Eye, pp. 1341-1342. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Bones, Joints, and Soft Tissue Tumors, pp. 1200-1202. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Osteoarticular And Connective Tissue Disease, pp. 673-674.
Question 535: Which of the following lesions is described as destructively invasive and locally malignant with rare metastasis?
- A. Fibroma
- B. Ameloblastoma (Correct Answer)
- C. Papilloma
- D. None of the above
Explanation: **Explanation:** The question describes a classic pathological behavior known as **"locally malignant"** or **"borderline"** neoplasia. **Why Ameloblastoma is correct:** Ameloblastoma is a primary odontogenic tumor, most commonly occurring in the mandible [2]. It is characterized by a "locally aggressive" nature. While it is histologically benign in most cases, it is **destructively invasive**, often causing significant bone resorption and expansion. Despite its ability to infiltrate surrounding tissues extensively, it has a **very low potential for metastasis** (rarely spreading to the lungs). This combination of local destruction without systemic spread defines its classification as a locally malignant tumor. **Why other options are incorrect:** * **A. Fibroma:** This is a purely **benign** mesenchymal tumor. It is encapsulated, slow-growing, and does not invade surrounding tissues or metastasize. * **C. Papilloma:** This is a **benign** epithelial tumor. While it can grow outward (exophytic), it does not show destructive invasion into the underlying stroma. **High-Yield NEET-PG Pearls:** * **Radiological Appearance:** Ameloblastoma typically presents as a **"soap-bubble"** or **"honeycomb"** multilocular radiolucency. * **Histopathology:** Look for "Vickers-Gorlin" criteria—palisading columnar cells with **reverse polarity** (nuclei away from the basement membrane) and central stellate reticulum-like cells. * **Other Locally Malignant Tumors:** Basal Cell Carcinoma (Rodent ulcer), Giant Cell Tumor of bone (Osteoclastoma), and Craniopharyngioma. These are frequent "except" type questions in NEET-PG [1]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Disorders Involving Inflammatory And Haemopoietic Cells, pp. 644-645. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Head and Neck, p. 741.
Question 536: HER-2/neu gene amplification causes breast carcinoma due to:
- A. Overexpression (Correct Answer)
- B. Suppression
- C. Mutation
- D. Translocation
Explanation: **Explanation:** The **HER-2/neu** (also known as **ERBB2**) gene is a proto-oncogene located on chromosome 17 that encodes a transmembrane glycoprotein with intrinsic tyrosine kinase activity [2]. It belongs to the Epidermal Growth Factor Receptor (EGFR) family [3]. **Why Overexpression is Correct:** In approximately 15–25% of breast cancers, the mechanism of oncogenesis is **gene amplification** (the presence of multiple copies of the gene) [1]. This leads to the production of excessive amounts of the HER-2 protein on the cell surface [1]. This **overexpression** results in continuous, ligand-independent signaling that promotes rapid cell proliferation and survival. **Analysis of Incorrect Options:** * **Suppression:** Proto-oncogenes like HER-2 must be activated, not suppressed, to cause cancer. Suppression is a mechanism associated with Tumor Suppressor Genes (e.g., TP53, RB). * **Mutation:** While point mutations can activate some oncogenes (like *RAS*), the primary driver for HER-2 in breast cancer is the increased number of gene copies leading to protein overexpression, not a structural change in the gene itself [1]. * **Translocation:** This is the hallmark of hematological malignancies (e.g., *BCR-ABL* in CML or *t(8;14)* in Burkitt Lymphoma) rather than HER-2 mediated breast carcinoma. **High-Yield Facts for NEET-PG:** * **Prognosis:** HER-2/neu positivity is traditionally associated with a more aggressive clinical course and poorer prognosis [1]. * **Targeted Therapy:** Patients with HER-2 overexpression respond to **Trastuzumab (Herceptin)**, a monoclonal antibody [1]. * **Testing:** Screening is done via **Immunohistochemistry (IHC)** to detect protein levels; borderline cases are confirmed via **FISH (Fluorescence In Situ Hybridization)** to detect gene amplification [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, p. 1066. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1059-1060. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, p. 292.
Question 537: Retinoblastoma is associated with which of the following conditions?
- A. Osteosarcoma (Correct Answer)
- B. Hepatocellular carcinoma
- C. Squamous cell carcinoma
- D. Osteochondroma
Explanation: **Explanation:** The correct answer is **A. Osteosarcoma**. **Underlying Medical Concept:** Retinoblastoma is caused by a mutation in the **RB1 gene** located on chromosome **13q14** [1]. This gene is a classic tumor suppressor that regulates the G1-S phase transition of the cell cycle [2]. In the **hereditary (germline) form** of retinoblastoma, patients carry a germline mutation in one RB allele. According to Knudson’s "Two-Hit Hypothesis," a second somatic mutation leads to retinoblastoma [1]. Because this germline mutation is present in every cell of the body, these patients are at a significantly increased risk (approx. 400-fold) of developing secondary primary malignancies later in life. **Osteosarcoma** is the most common secondary mesenchymal tumor associated with hereditary retinoblastoma. **Analysis of Incorrect Options:** * **B. Hepatocellular carcinoma:** This is primarily associated with chronic Hepatitis B/C infections, cirrhosis, or aflatoxin exposure, not the RB1 pathway. * **C. Squamous cell carcinoma:** This is typically linked to environmental factors (smoking, UV light, HPV) or chronic irritation, rather than germline RB1 mutations. * **D. Osteochondroma:** This is a benign bone tumor (exostosis) associated with mutations in the EXT1 or EXT2 genes, not the malignant transformation seen in RB1 survivors [3]. **High-Yield Clinical Pearls for NEET-PG:** * **RB1 Gene:** The first tumor suppressor gene discovered [1]. * **Two-Hit Hypothesis:** Proposed by Knudson specifically while studying Retinoblastoma [1]. * **Morphology:** Look for **Flexner-Wintersteiner rosettes** (specific for RB) and "cottage cheese" calcification on imaging. * **Secondary Cancers:** Apart from Osteosarcoma, patients are also at risk for **Pinealoblastoma** (termed "Trilateral Retinoblastoma") and soft tissue sarcomas. * **Treatment Risk:** Radiation therapy for the initial eye tumor further increases the risk of developing secondary Osteosarcoma in the facial bones. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 298-300. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Neoplasia, pp. 297-298. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Osteoarticular And Connective Tissue Disease, pp. 671-672.
Question 538: Which of the following is a component of the Carney triad?
- A. Gastric adenocarcinoma (Correct Answer)
- B. Paraganglioma
- C. Pulmonary chondroma
- D. Bronchogenic carcinoma
Explanation: The **Carney Triad** is a rare, non-hereditary syndrome characterized by the synchronous or metachronous occurrence of specific tumors. It primarily affects young females. ### **Explanation of the Correct Answer** The classic Carney Triad consists of three distinct components: 1. **Gastric Epithelioid Leiomyosarcoma** (now more accurately classified as **Gastric GIST** - Gastrointestinal Stromal Tumor). [1] 2. **Extra-adrenal Paraganglioma**. [2] 3. **Pulmonary Chondroma**. While the question identifies **Gastric Adenocarcinoma** as the correct option based on the provided key, it is important to note that in standard pathology (Robbins), the gastric component is specifically a **GIST**. [1] However, in certain examination contexts, "Gastric tumor" or "Gastric adenocarcinoma" may be used as a distractor or proxy for the gastric involvement. ### **Analysis of Incorrect Options** * **B. Paraganglioma:** This is actually a **correct** component of the triad. [2] If the question asks for "a" component and both A and B are listed, it may reflect a specific past-year paper variation or a typo in the provided key. * **C. Pulmonary Chondroma:** This is also a **correct** component of the triad (often presenting as "coin lesions" on X-ray). * **D. Bronchogenic Carcinoma:** This is incorrect; it is a common lung malignancy but has no association with the Carney Triad. ### **NEET-PG High-Yield Pearls** * **Carney Triad vs. Carney Complex:** Do not confuse them. **Carney Complex** (CNC) is autosomal dominant (PRKAR1A mutation) and involves **P**igmentation (lentigines), **A**trial Myxoma, and **E**ndocrine overactivity (NAME/LAMB syndrome). * **Incomplete Triad:** Most patients present with only two of the three tumors (usually GIST and Pulmonary Chondroma). * **Genetics:** Unlike Carney Complex, the Carney Triad is typically sporadic and associated with **SDH (Succinate Dehydrogenase)** deficiency. [1, 2] **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 782-783. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Head and Neck, pp. 748-749.
Question 539: Which of the following statements is NOT true regarding Ameloblastoma?
- A. It is the most common odontogenic tumor.
- B. It is generally benign.
- C. It is common in the 3rd to 5th decades of life.
- D. It arises from mesenchymal tissue. (Correct Answer)
Explanation: **Explanation** **Ameloblastoma** is a locally aggressive, polymorphic neoplasm of the jaw. The correct answer is **D** because Ameloblastoma is an **epithelial tumor**, not a mesenchymal one [1]. It arises from the dental lamina, the enamel organ, or the epithelial lining of an odontogenic cyst (all ectodermal derivatives). **Analysis of Options:** * **Option A (Most common odontogenic tumor):** This is a true statement. While odontomas are technically more frequent "hamartomas," Ameloblastoma is the most common true odontogenic neoplasm encountered in clinical practice [1]. * **Option B (Generally benign):** This is true. Although it is locally invasive and has a high recurrence rate if not widely excised, it is histologically benign and rarely metastasizes (Malignant Ameloblastoma is a rare exception) [1]. * **Option C (3rd to 5th decades):** This is true. The peak incidence is in middle-aged adults, with no significant gender predilection. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Most common in the **mandible** (80%), specifically the molar-ramus area. * **Radiology:** Classically presents as a **"Soap-bubble"** or **"Honey-comb"** multilocular radiolucency. * **Histopathology:** Features "Vickers-Gorlin" criteria—palisading columnar cells with **reverse polarity** (nuclei away from the basement membrane) and central **stellate reticulum-like** cells. * **BRAF V600E Mutation:** Frequently associated with the conventional (multicystic) type. * **Treatment:** Wide surgical excision (en bloc resection) is preferred over curettage due to the high risk of recurrence. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Head and Neck, pp. 741-742.
Question 540: What is the most suggestive sign or symptom of metastatic disease?
- A. Paresthesia (Correct Answer)
- B. Sudden swelling
- C. Root resorption
- D. Diffuse radiolucency
Explanation: **Explanation:** In the context of oral and maxillofacial pathology, **paresthesia** (numbness or tingling) is considered a "red flag" symptom and is the most suggestive clinical sign of a malignant process, particularly metastatic disease. **Why Paresthesia is the Correct Answer:** Metastatic tumors to the jaw (most commonly from the breast, lung, or prostate) often infiltrate the marrow spaces and involve the **inferior alveolar nerve (IAN)** or the mental nerve. Unlike benign tumors, which tend to push or displace nerves, malignant cells aggressively invade the perineural spaces [1]. This nerve involvement leads to sensory deficits, such as the "Numb Chin Syndrome" (mental nerve paresthesia), which is a classic clinical indicator of occult malignancy or metastasis. Invasive malignant tumors typically grow relatively rapidly with irregular margins and destroy adjacent tissues [2]. **Analysis of Incorrect Options:** * **B. Sudden swelling:** While malignancy can cause rapid growth, sudden swelling is more frequently associated with acute inflammatory processes, infections (abscesses), or trauma. * **C. Root resorption:** This is a common feature of slow-growing, benign but locally aggressive lesions (e.g., Ameloblastoma). Malignant tumors typically grow too rapidly to resorb roots, often resulting in "floating teeth" instead. * **D. Diffuse radiolucency:** This is a non-specific radiographic finding. It can be seen in metabolic bone diseases, chronic osteomyelitis, or various benign cystic lesions. **NEET-PG High-Yield Pearls:** * **Numb Chin Syndrome:** Unexplained paresthesia of the lower lip/chin should always be investigated for metastatic disease. * **Most common site for jaw metastasis:** The **Molar region of the Mandible** (due to high vascularity and hematopoietic marrow content). * **Primary sources:** In females, the most common primary is the **Breast**; in males, it is the **Lung**. **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. 232-233. [2] 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. 206-207.
Practice by Chapter
Nomenclature and Classification of Tumors
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Characteristics of Benign and Malignant Neoplasms
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Molecular Basis of Cancer
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Carcinogenesis and Carcinogens
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Tumor Progression and Metastasis
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Tumor Markers
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Paraneoplastic Syndromes
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Genetic Basis of Cancer
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Tumor Immunity
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Cancer Epidemiology and Prevention
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