Breast Imaging Practice Questions

Q: A 35-year-old woman presents with a rapidly enlarging palpable breast mass over the past 3 months. Mammography is performed. What is the most likely diagnosis?

Phyllodes tumor. ***Phyllodes tumor*** - The mammogram shows a **large, well-circumscribed, lobulated mass** with areas of increased density and possibly some calcifications, which is characteristic of a phyllodes tumor. - Phyllodes tumors are **biphasic fibroepithelial tumors** that can grow rapidly and tend to be larger than fibroadenomas, often presenting as palpable masses with a rapidly increasing size. *Fibroadenoma* - While fibroadenomas are also well-circumscribed, they are typically **smaller** and less lobulated than the mass seen in the image. - They often contain distinctive **"popcorn" calcifications** which are not clearly depicted here, and rapid growth is a less common feature. *Galactocele* - A galactocele is a **milk-filled cyst** that usually occurs in lactating or recently pregnant women. - Radiographically, it appears as a **well-defined, low-density mass** that can be challenging to differentiate from a fat lobule or lipoma, but it would not typically have the dense, solid-appearing components seen here. *Carcinoma breast* - Malignant breast tumors, especially invasive carcinomas, typically present with **spiculated margins**, irregular shapes, and architectural distortion, or suspicious microcalcifications. - The mass in the image, although large, is relatively **well-circumscribed** and does not exhibit the classic malignant features like spiculations or architectural distortion.

Q: Breast imaging reporting and data system (BI-RADS): Final assessment categorized a 45 year old female to have Category 5 disease. What does the report signify?

Highly suggestive of malignancy (≥95% malignant). ***Highly suggestive of malignancy (≥95% malignant)*** - A **BI-RADS Category 5** classification indicates imaging findings that are highly suggestive of **cancer**, with a very high probability (typically ≥95%) of malignancy. - This category usually prompts a recommendation for **biopsy** and definitive diagnosis due to the high suspicion. *Incomplete assessment* - An **incomplete assessment** is represented by **BI-RADS Category 0**, meaning additional imaging evaluation or prior mammograms are needed before a final assessment can be made. - This category does not suggest the likelihood of malignancy, but rather the need for further information. *Probably benign (≤2% malignant)* - **Probably benign findings** are categorized as **BI-RADS Category 3**, signifying a low probability of malignancy (≤2%). - These cases typically recommend **short-interval follow-up**, usually within 6 months, to monitor for changes. *Negative- Annual screening can be recommended.* - A **negative** assessment is designated as **BI-RADS Category 1**, indicating that the breast tissue is normal and there are no abnormal findings. - In such cases, routine **annual screening** or appropriate follow-up based on age and risk factors is recommended.

Q: What is not an advantage of USG over mammography?

Superior detection of microcalcifications. ***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.

Q: BIRADS stands for

Breast Imaging Reporting and Data System. ***Breast Imaging Reporting and Data System*** - **BIRADS** is a standardized system for reporting mammography, ultrasound, and MRI findings related to the breast. - It provides a **common lexicon** for radiologists to describe findings and assign a final assessment category, guiding patient management. *Best Imaging Reporting and Data System* - This option is incorrect because the "B" in BIRADS specifically refers to "**Breast**," indicating its application to breast imaging. - The term "**Best**" is a subjective adjective and not part of the official acronym used in medical imaging. *Blood Imaging Reporting and Data System* - This option is incorrect as BIRADS is exclusively used for **breast imaging** and does not pertain to blood-related diagnostic imaging. - Systems for reporting blood-related findings would fall under different medical specialties or laboratory medicine. *Brain Imaging Reporting and Data System* - This option is incorrect because BIRADS is specific to **breast imaging**, and there are other specialized reporting systems for brain imaging, such as **neuroradiology reporting guidelines**. - The acronym is directly tied to the anatomical region being examined, which is the breast.

Q: Which of the following features on mammogram would suggest malignancy?

Areas of spiculated microcalcifications. ***Areas of spiculated microcalcifications*** - **Spiculated microcalcifications** are highly suspicious for malignancy due to their irregular shape, distribution, and association with rapid, uncontrolled cell growth. - These calcifications often represent **necrotic cells** within rapidly growing tumors, which can deposit calcium. *Smooth borders* - **Smooth borders** typically indicate a benign lesion, such as a cyst or fibroadenoma, as they suggest gradual, uniform growth rather than invasive spread. - Malignant lesions tend to have **irregular** or ill-defined borders due to their infiltrative nature. *Well defined lesion* - A **well-defined lesion** usually suggests a benign process, as it indicates a mass that is clearly demarcated from surrounding tissue and is likely encapsulated. - Malignancies, conversely, often exhibit **indistinct or irregular margins** as they invade adjacent structures. *A mass of decreased density* - A mass of **decreased density** is generally considered a benign finding, often representing a **cyst** or an area of normal fatty tissue. - Malignant tumors typically present as a **mass of increased density** due to their cellular proliferation and desmoplastic reaction.

Q: Which of the following features suggests a malignant lesion on mammography?

Microcalcifications. ***Microcalcifications*** - **Fine, pleomorphic, branching, or linear calcifications** clustered together are highly suspicious for malignancy, particularly **ductal carcinoma in situ (DCIS)**. - They represent calcium deposits within the ducts or stromal calcifications related to tumor cells. *Macrocalcifications* - These are **larger, coarser calcifications** (typically >0.5 mm) which are almost universally benign. - They are often associated with benign conditions such as **fibroadenomas**, old trauma, or vascular calcifications. *Fat content* - Lesions predominantly composed of fat, such as **lipomas**, **oil cysts**, and **hamartomas**, are typically benign. - The presence of fat within a lesion on mammography generally indicates a **benign process**. *Round well defined borders* - A **smooth, rounded, and well-circumscribed margin** on mammography is a strong indicator of a benign lesion. - Malignant lesions typically have **irregular, spiculated, or ill-defined margins** due to invasive growth.

Q: You are shown the screening mammogram of a 55-year-old woman. Which one of the following is the MOST likely diagnosis?

Hamartoma. ***Hamartoma*** - A hamartoma is a **benign breast lesion** characterized by a well-circumscribed, encapsulated mass composed of varying proportions of **glandular, adipose, and fibrous tissues**. - On mammography, it typically appears as a **well-defined, pseudo-encapsulated mass** with both fatty and glandular components, giving it a **"slice of lemon" appearance** due to its heterogenous composition. *Galactocele* - A galactocele is a **benign cyst** filled with milky fluid, typically occurring in **lactating or recently lactating women**. - On mammography, it usually presents as a **well-circumscribed, oval or round mass** with variable density, sometimes showing a **fat-fluid level**, but without the distinct mixed tissue architecture of a hamartoma. *Hematoma* - A hematoma is a **collection of blood within the breast tissue**, usually resulting from **trauma, biopsy, or surgery**. - On mammography, it can appear as an **ill-defined or circumscribed mass**, often with **increased density or architectural distortion**, and may show signs of resolving blood products over time, which differs from the organized tissue components of a hamartoma. *Fibroadenoma* - A fibroadenoma is a **common benign tumor** composed of both **fibrous and glandular tissue**, most frequently seen in younger women. - On mammography, it typically appears as a **well-circumscribed, oval or lobulated mass** with uniform density, sometimes with **coarse calcifications**, but generally lacking the obvious fat and mixed tissue components characteristic of a hamartoma.

Q: Fat-containing breast lesions are seen in:

All of the options. ***All of the options*** - **Galactocele**, **fat necrosis**, and **hamartoma** are all types of breast lesions that can contain fat, making this the correct comprehensive answer. - Understanding that various benign breast conditions can present with a fat component is important for differential diagnosis. *Galactocele* - A **galactocele** is a benign **milk-filled cyst** that can develop in lactating or recently lactating women. - While primarily fluid-filled, it can sometimes contain areas of fat due to the milk's content (fat globules). *Fat necrosis* - **Fat necrosis** is a benign condition that occurs due to **trauma** or **ischemia** to breast tissue, leading to the breakdown of fat cells. - Imaging often reveals **oil cysts** or **calcifications** within areas of necrotic fat. *Hamartoma* - A **hamartoma** (also known as a fibroadenolipoma) is a benign mixed tumor composed of varying amounts of **glandular tissue**, **fibrous stroma**, and **fat**. - The fat component is typically well-defined and can give it a characteristic appearance on imaging.

Q: Current gold standard to detect ductal carcinoma in situ breast is:

Mammography. ***Mammography*** - **Mammography** is the gold standard for detecting **ductal carcinoma in situ (DCIS)**, often visible as microcalcifications. - It plays a crucial role in early detection and has been a cornerstone of breast cancer screening for decades. *CT/PET* - **CT scans** are primarily used for evaluating tumor extent and metastasis, not for initial DCIS detection. - **PET scans** are not routinely used for DCIS due to their lower resolution for subtle changes and higher false-negative rates for small lesions. *MRI* - While **MRI** is highly sensitive for breast cancer, its specificity for **DCIS** is lower, often leading to false positives. - It is typically used as an adjunct to mammography for high-risk screening or for evaluating the extent of known cancer, not as a primary screening tool for DCIS. *USG* - **Ultrasound (USG)** is effective for evaluating palpable masses or specific areas of concern identified on mammography, but it is not sensitive enough to reliably detect **microcalcifications** characteristic of DCIS. - It is often used to differentiate between solid and cystic lesions or guide biopsies, but not as a primary screening tool for DCIS.

Q: All of the following are true about mammography except -

It has a significant radiation risk. ***It has a significant radiation risk*** - While mammography involves **ionizing radiation**, the amount for a screening examination is very low, approximating that received from **natural background radiation** over a few weeks. - The benefits of early breast cancer detection significantly outweigh the extremely small theoretical risk of radiation-induced cancer. *It is basically X-ray imaging of the breast* - Mammography uses **low-dose X-rays** to create images of the breast tissue. - This imaging technique is specifically optimized to visualize dense and subtle changes within the breast. *It is a screening tool in breast cancer* - Mammography is a primary and highly effective **screening tool** used to detect breast cancer early, often before palpable lumps develop. - Regular screening significantly reduces breast cancer mortality by allowing for timely diagnosis and intervention. *It can detect microcalcifications* - Mammography is highly sensitive in detecting **microcalcifications**, which are tiny calcium deposits that can sometimes be an early sign of breast cancer, particularly ductal carcinoma in situ (DCIS). - The ability to visualize these small calcifications is crucial for early detection and diagnosis.

Question 1

A 35-year-old woman presents with a rapidly enlarging palpable breast mass over the past 3 months. Mammography is performed. What is the most likely diagnosis?

Accepted Answer

Phyllodes tumor

Answer

Fibroadenoma

Answer

Galactocele

Answer

Carcinoma breast

Question 2

Breast imaging reporting and data system (BI-RADS): Final assessment categorized a 45 year old female to have Category 5 disease. What does the report signify?

Accepted Answer

Highly suggestive of malignancy (≥95% malignant)

Answer

Incomplete assessment

Answer

Probably benign (≤2% malignant)

Answer

Negative - Annual screening can be recommended.

Question 3

What is not an advantage of USG over mammography?

Accepted Answer

Superior detection of microcalcifications

Answer

Can be used for guided biopsy

Answer

In young females with dense breasts

Answer

Can be used to differentiate solid VS cystic

Question 4

BIRADS stands for

Accepted Answer

Breast Imaging Reporting and Data System

Answer

Best Imaging Reporting and Data System

Answer

Blood Imaging Reporting and Data System

Answer

Brain Imaging Reporting and Data System

Question 5

Which of the following features on mammogram would suggest malignancy?

Accepted Answer

Areas of spiculated microcalcifications

Answer

Smooth borders

Answer

Well defined lesion

Answer

A mass of decreased density

Question 6

Which of the following features suggests a malignant lesion on mammography?

Accepted Answer

Microcalcifications

Answer

Macrocalcifications

Answer

Fat content

Answer

Round well defined borders

Question 7

You are shown the screening mammogram of a 55-year-old woman. Which one of the following is the MOST likely diagnosis?

Accepted Answer

Hamartoma

Answer

Galactocele

Answer

Hematoma

Answer

Fibroadenoma

Question 8

Fat-containing breast lesions are seen in:

Accepted Answer

All of the options

Answer

Galactocele

Answer

Fat necrosis

Answer

Hamartoma

Question 9

Current gold standard to detect ductal carcinoma in situ breast is:

Accepted Answer

Mammography

Answer

CT/PET

Answer

MRI

Answer

USG

Question 10

All of the following are true about mammography except -

Accepted Answer

It has a significant radiation risk

Answer

It is basically X ray imaging of the breast

Answer

It is a screening tool in breast cancer

Answer

It can detect microcalcifications

Breast Imaging — MCQs

Breast Imaging — MCQs

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