Breast Imaging Practice Questions

Q: A 50-year-old female presents with a new-onset palpable lump in her breast. What is the most appropriate initial imaging study?

Mammography. ***Mammography*** - **Mammography** is the **most appropriate initial imaging study** for a new breast lump in a 50-year-old female, as it serves as the primary modality for both **screening and diagnostic evaluation** of breast abnormalities. - It has high sensitivity for detecting **masses and calcifications** in this age group, where decreased breast density improves visualization of lesions. - In practice, for a palpable lump, mammography is often performed along with targeted ultrasound as part of comprehensive diagnostic evaluation. *Ultrasound* - While ultrasound is an essential complementary tool, especially for evaluating **palpable masses** and differentiating **solid from cystic lesions**, it is typically considered an **adjunct to mammography** rather than the initial or sole imaging study. - Ultrasound is operator-dependent and has lower sensitivity for detecting **microcalcifications** compared to mammography. - However, it is highly valuable for further characterization of masses identified on clinical examination or mammography. *MRI* - **MRI** is highly sensitive for breast cancer detection but is generally reserved for **high-risk screening**, **staging of known cancers**, evaluating extent of disease, or problem-solving in inconclusive cases. - Its high cost, longer examination time, and potential for **false positives** make it unsuitable as a primary imaging modality for initial evaluation of a breast lump. *CT scan* - A **CT scan** is not routinely used for the initial evaluation of breast lesions. - It involves **ionizing radiation** without providing adequate soft tissue resolution for breast tissue characterization. - CT is primarily used for **staging known breast cancers** to assess for locoregional or distant metastasis, rather than for primary diagnosis.

Q: Identify the radiological procedure shown in the image below.

Mammography. ***Mammography*** - The image shows a **mammography machine**, which is specifically designed for **breast imaging** - Mammography is the gold standard screening and diagnostic tool for **breast cancer detection** - The procedure uses **low-dose X-rays** to create detailed images of breast tissue - Characteristic features visible include the **compression paddles** and **specialized X-ray equipment** designed for breast positioning *Barium meal follow-through* - This is a **fluoroscopic examination** of the small intestine - Involves oral ingestion of **barium sulfate contrast** followed by serial X-rays to track its passage through the small bowel - Used to diagnose conditions like **Crohn's disease**, small bowel obstruction, or malabsorption syndromes - Does not involve the specialized equipment shown in the image *Barium enema examination* - A **contrast study** used to examine the large intestine (colon and rectum) - Involves rectal administration of **barium sulfate solution** to coat the colonic mucosa - Used to diagnose colorectal polyps, diverticular disease, or inflammatory bowel disease - Requires fluoroscopy equipment, not the breast-specific apparatus shown *Enteroclysis procedure* - A specialized technique for detailed visualization of the **small bowel** - Involves direct instillation of **barium and methylcellulose** through a **nasojejunal tube** into the jejunum - Provides better distension and mucosal detail compared to conventional small bowel follow-through - Requires fluoroscopy equipment and nasojejunal intubation, not the mammography device shown

Q: Best imaging modality in patients with breast implants is:

MRI scan. **MRI scan** - **MRI** is the most sensitive imaging modality for evaluating **breast implants** due to its superior soft tissue contrast and ability to detect implant ruptures (both intracapsular and extracapsular). - It provides detailed visualization of the implant shell and internal contents, allowing for the differentiation between intact and compromised implants. *CT scan* - **CT scans** are generally not the preferred imaging modality for breast implants as they expose the patient to **ionizing radiation** and offer limited soft tissue resolution compared to MRI. - While CT can identify larger implant ruptures, its sensitivity for subtle or intracapsular ruptures is lower than MRI. *Mammography* - **Mammography** in patients with implants can be challenging because the implants can obscure breast tissue, making it difficult to detect early **cancers**. - While specialized views (e.g., Ecklund views) are used, mammography is primarily for **cancer screening** and not optimal for implant integrity assessment. *Radionuclide scan* - **Radionuclide scans** (e.g. bone scans, PET scans) are not used for evaluating the integrity of breast implants. - These scans are primarily used to detect metabolic activity or target specific physiological processes, not for structural evaluation of implants.

Q: Which of the following calcification patterns on mammography is MOST characteristic of a benign lesion?

Tramline calcification. ***Tramline calcification*** - This pattern refers to **parallel linear calcifications** seen along the walls of blood vessels, representing **vascular calcification**. - Also known as **"railroad track" calcifications**, these are **pathognomonic for benign vascular calcification** and are classified as **BI-RADS 2** (benign finding). - They have **zero malignant potential** and represent atherosclerotic changes in vessel walls, making them the **MOST definitively benign** calcification pattern on mammography. - **No further workup or follow-up is required** for isolated vascular calcifications. *Macrocalcification* - These are **coarse calcifications** typically larger than 2-3 mm, often representing benign processes such as **involuting fibroadenomas** (popcorn-like), fat necrosis, or secretory calcifications. - While **generally benign**, the term "macrocalcification" is broad and certain patterns like **coarse heterogeneous calcifications** can occasionally warrant further evaluation. - Not as uniformly and definitively benign as vascular/tramline calcifications. *Punctate calcifications* - These are **tiny, round, dot-like calcifications** less than 0.5 mm in diameter. - They can be **benign or malignant** depending on their distribution and associated findings. - When scattered diffusely, they are typically benign (e.g., fibrocystic changes), but when clustered or in a segmental/linear distribution, they require further evaluation. *Microcalcification in linear distribution* - **Linear or segmental microcalcifications**, especially if **pleomorphic** (varying in size and shape), are highly suspicious for **ductal carcinoma in situ (DCIS)**. - This pattern suggests calcifications deposited within a duct and is classified as **BI-RADS 4 or 5** (suspicious or highly suggestive of malignancy). - **Biopsy is mandatory** to rule out malignancy.

Q: What is the investigation of choice for whole body imaging in metastatic breast cancer?

CT Scan. ***CT Scan (Correct answer for NEET 2013)*** - **Contrast-enhanced CT scan** was the standard imaging modality for **whole-body staging** in metastatic breast cancer at the time of this exam (2013). - CT offers **excellent spatial resolution** for detecting metastases in **bone, lung, liver, and lymph nodes**. - It is widely available, relatively quick, and provides comprehensive anatomical information. - **Modern Update:** While CT was the standard in 2013, **PET-CT (FDG-PET/CT) is now considered the gold standard** for whole-body staging in metastatic breast cancer due to its combined metabolic and anatomical imaging capabilities. However, PET-CT was not among the options in this historical question. *Magnetic Resonance Imaging* - **MRI** is highly sensitive for specific sites, particularly for **brain metastases** and **bone metastases (especially spine and bone marrow)**. - **Whole-body MRI** protocols are emerging but require longer acquisition times and specialized equipment. - Not ideal as a single first-line modality for comprehensive whole-body staging compared to CT (or modern PET-CT). *Angiography* - **Angiography** is an invasive vascular imaging procedure used to visualize **arterial blood flow**. - It has **no role in routine metastatic screening or staging** of breast cancer. - Reserved for specific indications like preoperative vascular mapping or interventional procedures. *Venography* - **Venography** specifically visualizes **venous structures** and is used to detect venous thrombosis or venous obstructions. - It is **not applicable** for detecting solid organ metastases, bone lesions, or lymph node involvement in cancer staging.

Q: BIRADS stage 5 is characterized by which of the following?

Highly suggestive of malignancy. ***Highly suggestive of malignancy*** - **BIRADS (Breast Imaging Reporting and Data System) category 5** indicates a very high probability (typically >95%) that the finding is malignant. - This category usually prompts **biopsy and definitive treatment** due to the strong suspicion of cancer. *Negative* - This description corresponds to **BIRADS category 1**, meaning no abnormality is seen and the breast tissue appears normal. - No further action, beyond routine screening, is required. *Probably benign* - This refers to **BIRADS category 3**, which indicates a finding with a very low probability of malignancy (<2%). - This category typically suggests **short-interval follow-up imaging** (usually 6 months) rather than immediate biopsy, to confirm stability. - Note: BIRADS 2 is definitively "Benign" with 0% malignancy risk, not "probably benign." *Suspicious abnormality* - This term is associated with **BIRADS category 4**, which indicates a suspicious finding that is not definitively malignant but **requires biopsy**. - Category 4 is further subdivided (4A, 4B, 4C) based on the level of suspicion, with increasing probability of malignancy (4A: 2-10%, 4B: 10-50%, 4C: 50-95%).

Question 1

A 50-year-old female presents with a new-onset palpable lump in her breast. What is the most appropriate initial imaging study?

Accepted Answer

Mammography

Answer

Ultrasound

Answer

MRI

Answer

CT scan

Question 2

Identify the radiological procedure shown in the image below.

Accepted Answer

Mammography

Answer

Barium enema examination

Answer

Proctography examination

Answer

Enteroclysis procedure

Question 3

Best imaging modality in patients with breast implants is:

Accepted Answer

MRI scan

Answer

CT scan

Answer

Mammography

Answer

Radionuclide scan

Question 4

Which of the following calcification patterns on mammography is MOST characteristic of a benign lesion?

Accepted Answer

Tramline calcification

Answer

Macrocalcification

Answer

Punctate calcifications

Answer

Microcalcification in linear distribution

Question 5

What is the investigation of choice for whole body imaging in metastatic breast cancer?

Accepted Answer

CT Scan

Answer

Angiography

Answer

Venography

Answer

Magnetic Resonance Imaging

Question 6

BIRADS stage 5 is characterized by which of the following?

Accepted Answer

Highly suggestive of malignancy

Answer

Negative

Answer

Probably benign

Answer

Suspicious abnormality

Breast Imaging — MCQs

Breast Imaging — MCQs

On this page

Practice by Chapter

Want unlimited practice?