Surgical Oncology Principles Practice Questions

Q: Which of the following is NOT considered a poor prognostic factor in liver metastasis?

Metachronous lesions. **Explanation:** The prognosis of liver metastasis, particularly from colorectal cancer, is determined by the **Fong Criteria (Clinical Risk Score)**. This scoring system helps predict recurrence and survival after surgical resection. **1. Why Metachronous lesions is the correct answer:** Metachronous lesions (metastases appearing >12 months after the primary tumor) are considered a **favorable prognostic factor** compared to synchronous lesions. A longer disease-free interval indicates a less aggressive tumor biology and a slower rate of spread, leading to better post-resection outcomes. **2. Analysis of Incorrect Options (Poor Prognostic Factors):** * **Synchronous lesions (Option A):** These are metastases detected at the same time as or within 12 months of the primary tumor. They indicate aggressive biology and are associated with a higher risk of recurrence. * **Extra-hepatic metastasis (Option B):** The presence of disease outside the liver (e.g., lung or peritoneal spread) signifies systemic involvement, significantly worsening the prognosis and often contraindicating curative resection. * **CEA > 200 ng/ml (Option D):** High preoperative Carcinoembryonic Antigen (CEA) levels are a strong biochemical marker for high tumor burden and poor survival outcomes. **Clinical Pearls for NEET-PG:** * **Fong’s Clinical Risk Score (CRS)** includes 5 factors: Node-positive primary, Disease-free interval 1, Largest tumor >5 cm, and CEA >200 ng/ml. * **Resectability** is no longer defined by what is removed, but by what is left behind (the **Future Liver Remnant - FLR**). A minimum of 20-25% of healthy liver parenchyma is required. * The most common site of distant metastasis for colorectal cancer is the **liver** (via portal circulation).

Q: What is the ideal treatment for a 3.4 cm carcinoid tumor of the appendix?

Right hemicolectomy. **Explanation:** The management of appendiceal carcinoid tumors (neuroendocrine tumors) is primarily determined by the **size of the tumor** and its location. 1. **Why Right Hemicolectomy is correct:** For appendiceal carcinoids, an appendectomy is sufficient if the tumor is 2 cm** (as in this case, 3.4 cm), because the risk of nodal metastasis increases significantly with size. Other indications for right hemicolectomy regardless of size include involvement of the base of the appendix, mesoappendiceal invasion, or high-grade histology (Goblet cell carcinoid). 2. **Why other options are incorrect:** * **Radiotherapy & Chemotherapy:** Carcinoid tumors are generally slow-growing (indolent) and are notoriously resistant to conventional radiotherapy and chemotherapy. Surgery remains the mainstay of treatment for localized disease. * **Observation:** This is inappropriate for a 3.4 cm mass due to the high risk of malignancy and lymphatic spread. Observation is only considered for very small, incidentally found tumors post-appendectomy that meet all low-risk criteria. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site** of carcinoid tumors in the GI tract: **Ileum** (though historically often cited as Appendix in older texts; current data suggests Small Bowel > Rectum > Appendix). * **Most common site within the appendix:** The **tip** (distal third). * **Carcinoid Syndrome:** Usually occurs only when there are **liver metastases** (bypassing portal circulation). * **Tumor Marker:** **Chromogranin A** (most sensitive) and 24-hour urinary **5-HIAA**. * **Diagnostic Rule of Thumb:** * 2 cm: Right Hemicolectomy.

Q: Which of the following is true about bronchial carcinoids?

Metastasis is common. **Explanation:** Bronchial carcinoids are neuroendocrine tumors arising from **Kulchitsky cells** of the bronchial epithelium. While often classified as "low-grade" compared to small cell carcinoma, they are nonetheless malignant. **Why Option B is Correct:** Contrary to the misconception that they are benign, bronchial carcinoids are inherently malignant. **Metastasis is common**, occurring in approximately **15–20% of typical carcinoids** and up to **50–70% of atypical carcinoids**. Metastasis usually involves the regional (hilar and mediastinal) lymph nodes, followed by distant sites like the liver and bone. **Analysis of Incorrect Options:** * **Option A:** Bronchial carcinoids are generally **radioresistant**. The primary treatment of choice is surgical resection (e.g., lobectomy or sleeve resection). * **Option C:** While rare (occurring in <5% of cases), **carcinoid syndrome can manifest**, especially when there are extensive liver metastases. Interestingly, bronchial carcinoids can sometimes cause the syndrome even without liver metastasis because their secretions enter the systemic circulation directly via the pulmonary veins, bypassing the portal circulation. * **Option D:** Most bronchial carcinoids (approx. 80%) are **central**, arising from the **large (mainstem/lobar) bronchi**, not the terminal bronchioles. This central location often leads to symptoms like persistent cough, hemoptysis, and obstructive pneumonia. **High-Yield NEET-PG Pearls:** * **Histology:** Look for a "salt and pepper" chromatin pattern and organoid growth. * **Classification:** Divided into **Typical** (<2 mitoses/10 HPF, no necrosis) and **Atypical** (2–10 mitoses/10 HPF or necrosis). * **Markers:** Positive for Chromogranin A, Synaptophysin, and CD56. * **Paraneoplastic Syndromes:** Bronchial carcinoids are a known cause of ectopic **ACTH production**, leading to Cushing’s syndrome.

Q: A 60-year-old lady presents with a 4 cm breast mass and ipsilateral infraclavicular lymphadenopathy. What is the clinical stage of the breast cancer?

T2N3. ### **Explanation** This question tests your knowledge of the **AJCC TNM Staging (8th Edition)** for breast cancer, which is a high-yield topic for NEET-PG. **1. Why T2N3 is Correct:** * **T (Tumor Size):** The mass is **4 cm**. According to TNM staging, T2 is defined as a tumor >2 cm but ≤5 cm in its greatest dimension. * **N (Nodal Status):** The patient has **ipsilateral infraclavicular lymphadenopathy**. In the AJCC classification, involvement of the infraclavicular (Level III) nodes is specifically categorized as **N3a**. * Combining these, the clinical stage is **T2N3**. **2. Why Other Options are Incorrect:** * **T2N2:** While the T-stage is correct, N2 refers to fixed/matted axillary nodes (N2a) or clinically detected internal mammary nodes in the absence of axillary nodes (N2b). It does not include infraclavicular nodes. * **T3N2 & T3N3:** T3 is defined as a tumor **>5 cm**. Since this mass is 4 cm, these options are incorrect. **3. Clinical Pearls for NEET-PG:** * **Nodal Staging Cheat Sheet:** * **N1:** Mobile ipsilateral axillary nodes (Level I, II). * **N2:** Fixed/matted ipsilateral axillary nodes OR internal mammary nodes. * **N3:** Infraclavicular (N3a), Internal mammary + Axillary (N3b), or Supraclavicular (N3c) nodes. * **Stage III Distinction:** Any N3 involvement automatically places the patient in **Stage IIIC**, regardless of the T stage (unless T4, which is also Stage IIIB/C). * **Remember:** Infraclavicular nodes are Level III axillary nodes, but for staging purposes, they are classified as N3.

Q: Which of the following represents a curative resection?

R0. ### Explanation The classification of surgical resection margins is based on the **Residual Tumor (R) Classification** system, which describes the status of the tumor remaining after a surgical procedure. **1. Why R0 is the Correct Answer:** An **R0 resection** indicates a **complete macroscopic and microscopic removal** of the tumor. There are no tumor cells at the resection margins when examined by a pathologist (negative margins). In surgical oncology, R0 is the gold standard and the only category that represents a **curative resection**, as it implies that all local disease has been eradicated. **2. Why the Other Options are Incorrect:** * **R1 Resection:** This refers to **microscopic residual tumor**. While the surgeon may believe they removed the entire mass (macroscopically clear), the pathologist finds tumor cells at the margin under the microscope. This is considered an incomplete resection. * **R2 Resection:** This refers to **macroscopic residual tumor**. The surgeon is aware that visible tumor was left behind (e.g., tumor debulking or involvement of unresectable vital structures). This is a palliative, not curative, procedure. * **R3:** This is not a standard part of the AJCC/UICC R-classification system. The scale traditionally ends at R2. **Clinical Pearls for NEET-PG:** * **The 1 cm Rule:** Traditionally, a 1 cm clear margin was sought for many solid tumors (like colorectal cancer), though modern "negative margin" definitions vary by organ (e.g., "no ink on tumor" for breast conservation). * **CRM (Circumferential Resection Margin):** Crucial in rectal cancer; a CRM of <1 mm is considered an R1 resection and predicts high local recurrence. * **Palliative Surgery:** R2 resections are often performed to relieve symptoms like obstruction or bleeding, even when cure is impossible.

Q: Which of the following is NOT a surrogate marker for assessing a patient's physical reserve to plan oncological treatment?

MSKCC neutropenia risk score. **Explanation:** In oncological surgery and chemotherapy planning, assessing a patient’s **physical reserve** (Performance Status) is critical to determine if they can tolerate aggressive treatment. **Why MSKCC Neutropenia Risk Score is the correct answer:** The MSKCC (Memorial Sloan Kettering Cancer Center) neutropenia risk score is a **predictive tool** used specifically to estimate the likelihood of a patient developing febrile neutropenia following chemotherapy. It focuses on hematological toxicity rather than the patient's overall functional capacity or baseline physical reserve. Therefore, it is not a surrogate marker for general performance status. **Analysis of Incorrect Options:** * **Karnofsky Performance Status (KPS):** A classic scale ranging from 0 to 100. It measures a patient's ability to perform daily activities and need for medical assistance. A higher score indicates better physical reserve. * **ECOG Performance Score:** Developed by the Eastern Cooperative Oncology Group, this scales from 0 (fully active) to 5 (dead). It is the most widely used tool in clinical trials to decide if a patient is fit for surgery or chemotherapy. * **Child-Pugh Score:** While primarily used for cirrhosis, in the context of **Hepatocellular Carcinoma (HCC)**, it is a vital surrogate marker for hepatic physical reserve. It dictates whether a patient can undergo major liver resection (usually reserved for Child-Pugh Class A). **High-Yield Clinical Pearls for NEET-PG:** * **ECOG 0-1:** Generally fit for aggressive surgery/chemotherapy. * **ECOG ≥3:** Usually candidates for palliative care rather than curative surgical resection. * **KPS <70%:** Indicates the patient is unable to care for themselves; prognosis is generally poor. * **Child-Pugh Components:** Remember the mnemonic **ABCDE** (Albumin, Bilirubin, Coagulation/INR, Distension/Ascites, Encephalopathy).

Question 1

Which of the following is NOT considered a poor prognostic factor in liver metastasis?

Accepted Answer

Metachronous lesions

Answer

Synchronous lesions

Answer

Extra-hepatic metastasis

Answer

CEA > 200 ng/ml

Question 2

What is the ideal treatment for a 3.4 cm carcinoid tumor of the appendix?

Accepted Answer

Right hemicolectomy

Answer

Radiotherapy

Answer

Chemotherapy

Answer

Observation

Question 3

Which of the following is true about bronchial carcinoids?

Accepted Answer

Metastasis is common

Answer

Highly radiosensitive

Answer

Carcinoid syndrome does not manifest

Answer

Commonly arise from terminal bronchioles

Question 4

A 60-year-old lady presents with a 4 cm breast mass and ipsilateral infraclavicular lymphadenopathy. What is the clinical stage of the breast cancer?

Accepted Answer

T2N3

Answer

T2N2

Answer

T3N2

Answer

T3N3

Question 5

Carcinoma of the lip is characterized by the following except:

Accepted Answer

Lymph node metastases are common, making radical neck dissection mandatory.

Answer

90% of lip cancers occur on the lower lip.

Answer

The most common site of origin is the vermillion border.

Answer

2 cm x 2 cm cell carcinomas can be treated by V-shaped excision and primary closure.

Question 6

Postoperative radiotherapy in breast cancer is indicated for which of the following reasons?

Accepted Answer

Prevention of local recurrence

Answer

Prevention of metastasis

Answer

Ablation of remnant cancer tissue

Answer

Prevention of distant metastasis

Question 7

Which of the following represents a curative resection?

Accepted Answer

R0

Answer

R1

Answer

R2

Answer

R3

Question 8

Adjuvant chemotherapy is of definite value in which of the following conditions?

Accepted Answer

Colon cancer

Answer

Pancreatic cancer

Answer

Gall bladder cancer

Answer

Esophageal cancer

Question 9

The proper treatment for lobular carcinoma in situ (LCIS) includes which of the following components?

Accepted Answer

Close follow-up.

Answer

Radiation after excision.

Answer

Mirror-image biopsy of the opposite breast.

Answer

Mastectomy and regional node dissection.

Question 10

Which of the following is NOT a surrogate marker for assessing a patient's physical reserve to plan oncological treatment?

Accepted Answer

MSKCC neutropenia risk score

Answer

Karnofsky performance status

Answer

ECOG performance score

Answer

Child-Pugh score

Surgical Oncology Principles — MCQs

Surgical Oncology Principles — MCQs

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