Breast Cancer Screening — MCQs
Which of the following statements are true? 1. Due to increasing mammography there occurs over diagnosis of breast carcinoma 2. Colon cancer screening is done by digital rectal examination 3. Oral cancer screening is done by visual inspection 4. Cervix cancer screening is done by a pap smear
ACR score 4 in breast imaging indicates
What is not an advantage of USG over mammography?
Which of the following is the most sensitive investigation for ductal carcinoma in situ (DCIS) of the breast?
On mammogram, all of the following are the features of a malignant tumor except:
Triple assessment for carcinoma breast includes:
Age for regular mammography screening in average-risk women is
Gold standard investigation for breast carcinoma screening in a patient with silicone breast implants
Screening is not useful in which carcinoma
There are 40 new cases of carcinoma of breast per 100,000 women/ year in country 'X' & 100 new cases / 100,000 women/ year in Country 'Y'. Based on this statistical data which of the following statement is true?
Breast Cancer Screening Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following statements are true? 1. Due to increasing mammography there occurs over diagnosis of breast carcinoma 2. Colon cancer screening is done by digital rectal examination 3. Oral cancer screening is done by visual inspection 4. Cervix cancer screening is done by a pap smear
- A. 1,2,3,4
- B. 4 only
- C. 1,3,4 (Correct Answer)
- D. 2,3,4
Explanation: ***Correct: 1,3,4*** - **Statement 1 is TRUE**: Overdiagnosis is a well-documented consequence of increased mammography screening. It detects slow-growing tumors that might never have caused clinical symptoms or harm during a woman's lifetime, leading to unnecessary treatment and associated morbidities. - **Statement 3 is TRUE**: Oral cancer screening primarily involves thorough visual inspection by a healthcare professional to identify suspicious lesions, ulcers, or color changes in the oral cavity. - **Statement 4 is TRUE**: Cervical cancer screening is effectively done by Pap smear, which detects precancerous and cancerous cells. - **Statement 2 is FALSE**: Digital rectal examination is NOT the primary screening method for colon cancer. Standard screening methods include colonoscopy, fecal occult blood testing (FOBT), and fecal immunochemical test (FIT). *Incorrect: 1,2,3,4* - While statements 1, 3, and 4 are true, statement 2 is incorrect. Digital rectal examination is not a primary or definitive screening method for colon cancer—it only examines the rectum and misses most of the colon. *Incorrect: 4 only* - While cervical cancer screening by Pap smear is true, this option is incomplete as it misses other true statements (1 and 3) regarding mammography overdiagnosis and oral cancer screening. *Incorrect: 2,3,4* - This option incorrectly includes statement 2. Colon cancer screening is NOT done by digital rectal examination. Proper screening methods include colonoscopy, FOBT, FIT, and flexible sigmoidoscopy.
Question 2: ACR score 4 in breast imaging indicates
- A. Probably benign
- B. Highly suggestive of malignancy
- C. Negative
- D. Suspicious abnormality (Correct Answer)
Explanation: ***Suspicious abnormality*** - An **ACR BI-RADS category 4** indicates a **suspicious abnormality** that necessitates a biopsy to rule out malignancy. - The risk of malignancy in this category ranges from **2% to 94%**, representing findings that do not have the classic appearance of malignancy but have a definite probability of being cancer. *Probably benign* - This description corresponds to an **ACR BI-RADS category 3**, which suggests a less than 2% chance of malignancy. - Category 3 findings are usually followed up with **short-term interval imaging** (e.g., 6 months) to assess stability. *Highly suggestive of malignancy* - This corresponds to an **ACR BI-RADS category 5**, where the findings almost certainly represent **malignancy** (at least 95% probability). - Category 5 lesions require **appropriate action**, such as biopsy or definitive treatment, based on the highest level of suspicion. *Negative* - This description is for an **ACR BI-RADS category 1**, meaning there are **no significant findings** and the breast is normal. - Category 1 indicates that the study is completed and no further action is needed beyond routine screening.
Question 3: What is not an advantage of USG over mammography?
- A. Can be used for guided biopsy
- B. Superior detection of microcalcifications (Correct Answer)
- C. In young females with dense breasts
- D. Can be used to differentiate solid VS cystic
Explanation: ***Superior detection of microcalcifications*** - **Mammography** is the gold standard for detecting **microcalcifications**, which can be a key indicator of **ductal carcinoma in situ (DCIS)** or early invasive breast cancer. - **Ultrasound (USG)** has limited sensitivity for detecting and characterizing microcalcifications. *Can be used for guided biopsy* - **USG-guided biopsy** is a common and advantageous technique for obtaining tissue samples from suspicious lesions in the breast or other organs. - This allows for **real-time visualization** of the needle, improving accuracy and reducing complications. *Can be used to differentiate solid VS cystic* - **USG** excels at distinguishing between **solid masses and fluid-filled cysts** due to differences in sound wave reflection. - This capability is crucial in characterizing breast lesions and often eliminates the need for further invasive procedures for benign cysts. *In young females with dense breasts* - **Dense breast tissue** in young females can obscure lesions on mammography, making interpretation difficult. - **USG** is particularly valuable in this population because it is not hindered by breast density and can provide a clearer view of underlying pathology.
Question 4: Which of the following is the most sensitive investigation for ductal carcinoma in situ (DCIS) of the breast?
- A. PET Scan
- B. Ultrasound
- C. Mammography (Correct Answer)
- D. MRI
Explanation: ***Mammography*** - **Mammography** is the **gold standard** and **primary imaging modality** for detecting **ductal carcinoma in situ (DCIS)**, primarily because it excels at visualizing **microcalcifications**, which are the hallmark of DCIS. - Approximately **80-90% of DCIS cases** present as **microcalcifications** on mammograms, making it the most important screening and diagnostic tool. - Mammography has **high sensitivity (85-95%)** for detecting DCIS, especially calcified forms, and is widely available and cost-effective. *MRI* - While **MRI** has high sensitivity for invasive breast cancer and can detect non-calcified DCIS, it is **not the primary screening tool** for DCIS detection. - MRI is typically used for **staging known DCIS**, evaluating **extent of disease**, detecting **additional foci**, and screening **high-risk patients**. - However, MRI has lower specificity and higher false-positive rates compared to mammography, limiting its use as a primary diagnostic tool. *PET Scan* - **PET scans** are generally **not sensitive** for detecting **DCIS** because DCIS lesions typically have a **low metabolic rate** and do not avidly take up the **FDG tracer**. - PET scans are primarily used for detecting **invasive cancers** and assessing **metastatic disease**, not for non-invasive lesions like DCIS. *Ultrasound* - **Ultrasound** has **limited sensitivity** for detecting **DCIS** because DCIS often does not present as a palpable mass or a distinct sonographic abnormality. - While ultrasound can be useful for evaluating palpable masses or guiding biopsies, it frequently **misses microcalcifications** that are characteristic of DCIS. - Ultrasound is mainly used as a **complementary tool** to mammography, not as a primary diagnostic modality for DCIS.
Question 5: On mammogram, all of the following are the features of a malignant tumor except:
- A. Microcalcification
- B. Irregular mass
- C. Macrocalcification (Correct Answer)
- D. Spiculation
Explanation: ***Macrocalcification*** - **Macrocalcifications** are typically **benign** and are often associated with involutional changes in the breast, such as aging or fibroadenomas. - These are usually larger, coarser calcifications that are easily seen and rarely indicate malignancy. *Microcalcification* - **Microcalcifications**, especially when **pleomorphic**, **linear**, or grouped, are a significant indicator of potential malignancy, such as **ductal carcinoma in situ (DCIS)**. - They represent calcium deposits within the ducts or stromal tissue, which can be associated with rapidly proliferating cells. *Irregular mass* - An **irregularly shaped mass** with ill-defined margins is highly suspicious for malignancy because it suggests invasive growth into surrounding tissues. - Unlike benign lesions which tend to be round or oval with smooth borders, malignant tumors often grow in an uncontrolled, infiltrative manner. *Spiculation* - **Spiculation** refers to **radiating lines or projections** extending from the borders of a mass, indicating an infiltrative process highly suggestive of malignancy. - These spicules represent fibrous tissue reaction to an invading tumor and are a strong predictor of breast cancer.
Question 6: Triple assessment for carcinoma breast includes:
- A. Observation, Ultrasonography, biopsy/cytology
- B. History, clinical examination, biopsy/cytology
- C. History, clinical examination, Ultrasonography
- D. Clinical examination, Mammography, biopsy/cytology (Correct Answer)
Explanation: ***Clinical examination, Mammography, biopsy/cytology*** - The **triple assessment** for breast carcinoma is a gold standard diagnostic approach comprising **clinical evaluation**, **imaging studies**, and **histopathological assessment**. - **Clinical examination** assesses physical signs, **mammography** provides imaging, and **biopsy/cytology** offers definitive tissue diagnosis. *Observation, Ultrasonography, biopsy/cytology* - **Observation** is not a formal component of the triple assessment; it lacks the specific diagnostic purpose of clinical examination. - While **ultrasonography** is an important imaging modality, particularly for younger women or dense breasts, **mammography** is typically the primary imaging component for initial screening in the triple assessment. *History, clinical examination, biopsy/cytology* - **History** is crucial for understanding risk factors and symptom presentation but is considered part of the broader clinical workup rather than one of the specific "triple" components. - This option omits crucial **imaging**, which is a mandatory part of the triple assessment. *History, clinical examination, Ultrasonography* - While history and clinical examination are vital, this option completely lacks a **histopathological component (biopsy/cytology)**, which is essential for definitive diagnosis of malignancy. - This option also specifies **ultrasonography** over mammography, which, while useful, may not be the primary initial imaging component in all triple assessments.
Question 7: Age for regular mammography screening in average-risk women is
- A. 40 (Correct Answer)
- B. 55
- C. 25
- D. 35
Explanation: ***40*** - Current guidelines from organizations like the **American Cancer Society (ACS)** recommend that women at **average risk** begin regular annual mammography screening at **age 40**. - While other organizations have slightly different recommendations, **age 40** is a commonly cited starting point to maximize benefits for average-risk women. *55* - **Age 55** is typically when some guidelines suggest transitioning to **biennial** (every other year) mammography screening, rather than initiating it. - Delaying initial screening until 55 would miss potential early detection opportunities for many women. *25* - **Age 25** is generally considered too young for routine mammography screening in **average-risk women**, as breast tissue is denser and cancer incidence is very low. - Screening this early is reserved for high-risk individuals with specific genetic mutations or strong family histories. *35* - While **age 35** is closer to the recommended starting age, it is generally earlier than the standard guidelines for **average-risk women**. - Some high-risk individuals might begin screening around this age, but it's not the universal recommendation for the general population.
Question 8: Gold standard investigation for breast carcinoma screening in a patient with silicone breast implants
- A. Mammography
- B. CT scan
- C. USG
- D. MRI (Correct Answer)
Explanation: ***MRI*** - **MRI** is considered the **gold standard** for breast cancer screening in patients with silicone breast implants due to its superior ability to visualize breast tissue through the implant and detect subtle lesions. - It offers **high sensitivity** in detecting both implant rupture and early malignancies, often providing better clarity than mammography in augmented breasts where implants can obscure tissue. *Mammography* - While a standard screening tool, **mammography** can be limited in patients with silicone implants because the implants can **obscure adjacent breast tissue**, making detection of small masses challenging. - Special views (e.g., **Eklund views**) can be used, but sensitivity is still reduced compared to MRI in augmented breasts. *CT scan* - **CT scans** are not routinely used for primary breast cancer screening due to their use of **ionizing radiation** and lower sensitivity for detecting early breast lesions compared to MRI. - CT is more commonly used for **staging** advanced cancers or evaluating complex masses detected by other modalities. *USG* - **Ultrasound (USG)** is a valuable complementary tool, especially for evaluating palpable lumps or clarifying findings from mammography, but it is **operator-dependent** and has a lower overall sensitivity for general screening compared to MRI. - It is particularly useful for differentiating between **cystic and solid masses** and detecting implant ruptures but is not the gold standard for comprehensive screening in augmented breasts.
Question 9: Screening is not useful in which carcinoma
- A. Testicular carcinoma (Correct Answer)
- B. Carcinoma prostate
- C. Carcinoma colon
- D. Carcinoma breast
Explanation: Testicular carcinoma - **Testicular cancer** typically presents as a painless mass, and **self-examination** is often emphasized for early detection rather than formal screening programs due to low incidence and variable benefits. - While early detection is important, population-wide screening for testicular cancer is **not recommended** due to its rarity and lack of evidence for improved outcomes compared to opportunistic detection. *Carcinoma prostate* - **Prostate cancer screening** using **PSA (prostate-specific antigen)** testing and digital rectal examinations is routinely performed, though its benefits and risks are debated [1]. - Early detection aims to identify potentially aggressive cancers, but also leads to **overdiagnosis and overtreatment** of indolent lesions [1]. *Carcinoma colon* - **Colorectal cancer screening** is highly effective and widely recommended through methods like **colonoscopy**, fecal occult blood testing, and sigmoisingoscopy. - Screening aims to detect **polyps** before they become cancerous or find cancer at an early, treatable stage, significantly reducing mortality. *Carcinoma breast* - **Breast cancer screening** using **mammography** is a well-established and highly effective method for early detection in women. - Early detection allows for timely treatment, significantly improving prognosis and reducing breast cancer mortality.
Question 10: There are 40 new cases of carcinoma of breast per 100,000 women/ year in country 'X' & 100 new cases / 100,000 women/ year in Country 'Y'. Based on this statistical data which of the following statement is true?
- A. More women in Country 'Y' are smokers
- B. Country 'X' has more number of younger women than country 'Y' (Correct Answer)
- C. More preventive & screening measures like mammography are available in Country 'X'
- D. More women in Country 'X' had breastfed their children
Explanation: ***Country 'X' has more number of younger women than country 'Y'*** - This statement implies that the age distribution of the population significantly impacts disease incidence rates, especially for diseases like breast carcinoma that increase with age. If Country 'X' has a younger population, its **age-adjusted incidence rate** might be similar to or even higher than Country 'Y's, despite the crude incidence being lower. - The presented data represents **crude incidence rates**. Without age-standardization, comparing crude incidence rates between populations with different age structures can be misleading. A lower crude incidence in Country 'X' could be due to a younger population, masking a potentially similar or higher age-specific risk. - This is the most likely explanation for the observed difference and demonstrates understanding of the importance of age-standardization in epidemiological comparisons. *More women in Country 'Y' are smokers* - While smoking is a risk factor for several cancers, its direct and strong association with **breast cancer incidence** is not as pronounced as with other cancers (e.g., lung cancer). The evidence linking smoking to breast cancer is weak and inconsistent. - Country 'Y' having more smokers does not adequately explain its higher breast cancer incidence compared to Country 'X' based solely on this limited data. *More preventive & screening measures like mammography are available in Country 'X'* - Effective **screening programs** like mammography typically **increase** detected incidence rates, not decrease them, due to earlier detection of previously undiagnosed cases (detection bias). - Better screening leads to higher reported incidence (at least initially), not lower incidence. Therefore, this option contradicts the observed lower incidence in Country 'X' and cannot explain the data. - Screening affects **detection rates and stage at diagnosis**, but does not reduce the actual occurrence of disease. *More women in Country 'X' had breastfed their children* - **Breastfeeding** is known to be a protective factor against breast cancer, potentially lowering a woman's lifetime risk. - While this could contribute to a lower incidence in Country 'X', this factor alone is unlikely to explain such a large disparity (2.5-fold difference) in crude incidence rates, especially when compared to the impact of population age structure, which is a much stronger determinant of crude incidence rates.
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