Benign Breast Diseases — MCQs
Which of the following breast lesions is associated with the HIGHEST risk of developing invasive breast cancer?
ACR score 4 in breast imaging indicates
Gold standard investigation for breast carcinoma screening in a patient with silicone breast implants
On mammogram, all of the following are the features of a malignant tumor except:
A microbiology laboratory reports growth of Staphylococcus aureus from pus drained from a breast abscess. What is the most likely condition predisposing the patient to the development of a breast abscess?
Inflammatory carcinoma of the breast is classified under which category?
Which of the following conditions is not typically treated with a simple mastectomy?
In a patient presenting with jaundice, the HIDA scan would be most useful for which of the following:
A 43 year old woman presented with serous discharge from a single duct of the nipple of her right breast which was sent for evaluation. She is unlikely to be suffering from
A 17 year old girl presents with an ovarian cyst of 5cm. The cyst is echo free, unilocular and CA 125 of 8U/ml. What is most appropriate management?
Benign Breast Diseases Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following breast lesions is associated with the HIGHEST risk of developing invasive breast cancer?
- A. Sclerosing adenosis
- B. Simple fibroadenoma
- C. Florid hyperplasia
- D. Atypical hyperplasia (Correct Answer)
Explanation: ***Correct: Atypical hyperplasia*** - **Atypical hyperplasia** (either atypical ductal hyperplasia [ADH] or atypical lobular hyperplasia [ALH]) represents a proliferative lesion with some, but not all, features of carcinoma in situ [1] - Associated with a **4-5 times greater risk** of developing invasive breast cancer compared to the general population - Characterized by disordered architectural patterns and cellular atypia, indicating a **significant increased risk** for future malignancy [1] - Considered a high-risk lesion requiring close surveillance *Incorrect: Sclerosing adenosis* - This is a **benign proliferative lesion** characterized by increased glandular elements and stromal fibrosis - Confers only a **slightly increased risk (1.5-2 times)** of breast cancer - While it can sometimes mimic carcinoma on imaging, it is generally considered a **low-risk lesion** *Incorrect: Simple fibroadenoma* - A **simple fibroadenoma** is a benign tumor composed of both glandular and stromal tissue - **Does not increase the risk** of breast cancer - Typically presents as **well-circumscribed, mobile masses** and is among the most common benign breast lesions *Incorrect: Florid hyperplasia* - Also known as **usual ductal hyperplasia without atypia** - Involves an increase in the number of epithelial cells within the ductal lumen but lacks cellular atypia - Carries a **minimal increased risk (1.5-2 times)** for developing invasive breast cancer - The absence of atypia distinguishes it from the higher-risk atypical hyperplasia **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, pp. 1054-1056.
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: 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 4: 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 5: A microbiology laboratory reports growth of Staphylococcus aureus from pus drained from a breast abscess. What is the most likely condition predisposing the patient to the development of a breast abscess?
- A. Endocarditis
- B. Menopause
- C. Breast feeding (Correct Answer)
- D. Inflammatory breast carcinoma
Explanation: ***Breast feeding*** - **Lactation** is the most common predisposing factor for breast abscesses, as **milk stasis** and **cracked nipples** can lead to bacterial entry and infection. - *Staphylococcus aureus* is the most frequent pathogen isolated in **lactational mastitis** and subsequent abscess formation. *Endocarditis* - Endocarditis is an infection of the **heart valves** and, while it can cause septic emboli, it is not a direct predisposing factor for a localized breast abscess. - The primary symptoms of endocarditis are usually systemic, such as fever, new heart murmurs, and embolic phenomena, which are not described here. *Menopause* - Menopause involves hormonal changes that can affect breast tissue but typically does not predispose women to acute bacterial breast abscesses. - Postmenopausal breast infections are less common and often associated with duct ectasia or other benign conditions rather than acute abscesses from *Staphylococcus aureus*. *Inflammatory breast carcinoma* - Inflammatory breast carcinoma can mimic infection with redness and warmth, but it is a **malignancy** and does not directly predispose to a bacterial abscess. - While it can sometimes be superimposed on an infection or cause skin changes that increase infection risk, it is not the most direct predisposing condition for a *Staphylococcus aureus* abscess.
Question 6: Inflammatory carcinoma of the breast is classified under which category?
- A. T4b
- B. T4c
- C. T4d (Correct Answer)
- D. T3
Explanation: ***T4d*** - **Inflammatory carcinoma of the breast** is specifically classified as **T4d** in the TNM staging system, regardless of tumor size. - This classification reflects its unique clinical presentation with **diffuse erythema, edema, and peau d'orange** (orange peel skin) due to lymphatic invasion [1]. *T4b* - **T4b** refers to breast cancer with clinically evident **edema, ulceration of the skin of the breast**, or satellite skin nodules in the same breast [2]. - While inflammatory carcinoma might have edema, the hallmark features of widespread erythema and lymphatic involvement distinguish T4d. *T4c* - **T4c** is used when a tumor exhibits **both T4a and T4b features**. - **T4a** involves chest wall fixation, and T4b involves skin edema/ulceration; neither specifically defines inflammatory breast cancer [2]. *T3* - **T3** classifies breast tumors larger than **5 cm in greatest dimension** but without features of T4. - Inflammatory breast cancer is defined by its characteristic skin changes and lymphatic involvement, not solely by tumor size. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Liver And Biliary System Disease, pp. 453-454. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Breast, p. 1068.
Question 7: Which of the following conditions is not typically treated with a simple mastectomy?
- A. Paget's disease
- B. Fibroadenoma (Correct Answer)
- C. Cystosarcoma phyllodes
- D. None of the options
Explanation: ***Fibroadenoma*** - A **fibroadenoma** is a **benign tumor** of the breast that typically does not require a mastectomy for treatment. - Treatment usually involves **observation**, **excision**, or **cryoablation**, depending on size, symptoms, and patient preference. *Paget's disease* - **Paget's disease of the breast** is a rare form of breast cancer that affects the nipple and areola, and is typically associated with an underlying **ductal carcinoma in situ** (DCIS) or **invasive breast cancer**. - Due to the presence of malignancy and its superficial spread, **mastectomy** (simple or modified radical) is often the recommended treatment, especially for extensive disease. *Cystosarcoma phyllodes* - Formerly known as **phyllodes tumor**, this is a rare **stromal tumor** of the breast that can be benign, borderline, or malignant. - Due to its potential for local recurrence and, in malignant cases, metastasis, **wide local excision with clear margins** is crucial, and a **simple mastectomy** may be necessary for large or recurrent tumors to achieve adequate margin control. *None of the options* - This option is incorrect because fibroadenoma is a condition not typically treated with a simple mastectomy, unlike Paget's disease and cystosarcoma phyllodes.
Question 8: In a patient presenting with jaundice, the HIDA scan would be most useful for which of the following:
- A. Biliary atresia (Correct Answer)
- B. Cholelithiasis
- C. Benign biliary disease
- D. Bile duct carcinoma
Explanation: ***Biliary atresia*** - A **HIDA scan** (hepatobiliary iminodiacetic acid scan) is instrumental in diagnosing biliary atresia by demonstrating the **absence of bile flow** into the duodenum. - In infants with persistent jaundice, the failure of the tracer to appear in the small bowel after a prolonged period strongly suggests this condition, indicating **obstructed or absent bile ducts**. *Cholelithiasis* - While HIDA scans can detect **cystic duct obstruction** in acute cholecystitis, they are less definitive for uncomplicated cholelithiasis (gallstones without acute inflammation). - **Ultrasound** is typically the primary imaging modality for diagnosing gallstones due to its non-invasiveness and ability to visualize stones directly. *Benign biliary disease* - This is a broad category, and while a HIDA scan can assess bile flow, it's not the **primary diagnostic tool** for all benign biliary conditions. - For most benign biliary diseases (e.g., choledocholithiasis without acute cholecystitis), **ultrasound, ERCP, or MRCP** often provide more detailed anatomical information. *Bile duct carcinoma* - A HIDA scan might show **obstructed bile flow** in bile duct carcinoma (cholangiocarcinoma), but it does not provide the detailed anatomical information or staging necessary for diagnosis and treatment planning. - **CT, MRI, MRCP, or ERCP** with biopsy are far more effective for identifying, characterizing, and staging bile duct malignancies.
Question 9: A 43 year old woman presented with serous discharge from a single duct of the nipple of her right breast which was sent for evaluation. She is unlikely to be suffering from
- A. Intraductal Papilloma
- B. Fibrocystic disease (Correct Answer)
- C. Carcinoma
- D. Duct Ectasia
Explanation: ***Fibrocystic disease*** - **Fibrocystic changes** usually present with **lumpy breasts**, pain, and sometimes **multiple** duct nipple discharge, which can be clear or milky. - A **single duct serous discharge** is not a typical presentation, making it less likely given the details. *Intraductal Papilloma* - **Intraductal papilloma** is the **most common cause** of **serous or bloody nipple discharge** from a **single duct**. - This benign tumor grows within the milk ducts and is a frequent finding with the described symptoms. *Carcinoma* - **Ductal carcinoma in situ (DCIS)** or **invasive ductal carcinoma** can present with **unilateral, bloody or serous nipple discharge** from a **single duct**. - The type of discharge and its unilateral, single-duct nature are concerning features that warrant malignancy exclusion. *Duct Ectasia* - **Duct ectasia** can cause nipple discharge which is often **thick, sticky, and multicolored** (green, black, or brown), and may be associated with **nipple inversion**. - While it can be from a single duct, the discharge is typically **not serous** and is more characteristic of a **dilated or inflamed duct**.
Question 10: A 17 year old girl presents with an ovarian cyst of 5cm. The cyst is echo free, unilocular and CA 125 of 8U/ml. What is most appropriate management?
- A. Laparoscopy for cyst removal
- B. Conservative with follow up ultrasound (Correct Answer)
- C. Laparotomy for cyst removal
- D. Medical treatment
Explanation: ***Conservative with follow up ultrasound*** - A 5cm **unilocular, echo-free ovarian cyst** in a 17-year-old with a normal **CA-125** (8 U/mL is well within the normal range, typically <35 U/mL) is highly suggestive of a **benign functional cyst**. - Expectant management with **serial ultrasound follow-up** is the most appropriate initial approach, as these cysts often resolve spontaneously. *Laparoscopy for cyst removal* - This is an **invasive procedure** that is not indicated for a likely benign, asymptomatic ovarian cyst, especially given the young age of the patient. - Surgical intervention would only be considered if the cyst persists, grows significantly, causes symptoms, or shows suspicious features on imaging. *Laparotomy for cyst removal* - **Laparotomy** is an even more invasive surgical approach than laparoscopy, involving a larger incision, and is reserved for cases where malignancy is strongly suspected or for very large, complex cysts that cannot be removed laparoscopically. - Given the benign characteristics of the cyst, this approach is unwarranted. *Medical treatment* - There is **no specific medical treatment** (e.g., medication) that effectively resolves functional ovarian cysts. - While hormonal contraceptives can sometimes suppress the formation of new functional cysts, they do not typically treat an existing one of this nature.
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