KMU Past Paper Practice

Question:

A 43-year-old woman undergoes biopsy for a nodular breast abnormality. Several cysts have ruptured, and the surrounding tissue shows chronic inflammation followed by dense stromal change. Which process most directly accounts for the increased firmness of the affected breast tissue?

Options:

Correct Answer:
Reactive stromal fibrosis after cyst rupture

Explanation: Rupture of breast cysts releases their contents into surrounding tissue, causing inflammation and subsequent fibrosis. The resulting dense stroma contributes to the firm texture of fibrocystic change.

Question:

A well-circumscribed breast mass from a 24-year-old woman contains proliferating fibrous stroma surrounding ducts that remain relatively round and open rather than being compressed into slits. Which morphological pattern of fibroadenoma is demonstrated?

Options:

Correct Answer:
Pericanalicular pattern

Explanation: In the pericanalicular pattern, proliferating stroma grows around the ducts while their lumina remain relatively round. Intracanalicular growth compresses ducts into slit-like spaces.

Question:

A 58-year-old man with chronic liver disease develops progressive bilateral subareolar breast enlargement. No discrete malignant mass is identified. Which alteration most plausibly contributes to this presentation?

Options:

Correct Answer:
Reduced hepatic handling of estrogenic hormones

Explanation: Chronic liver disease can disturb normal hormone metabolism and shift the estrogen-androgen balance toward estrogenic influence, promoting gynecomastia.

Question:

A 67-year-old postmenopausal woman with marked obesity is being counseled about factors contributing to breast-cancer risk. Which mechanism best explains the relevance of obesity after menopause?

Options:

Correct Answer:
Increased peripheral production of estrogens

Explanation: After menopause, adipose tissue becomes an important site of peripheral estrogen formation. Greater adiposity can therefore increase estrogenic stimulation of breast epithelium.

Question:

A 42-year-old woman develops breast carcinoma many years after receiving therapeutic radiation involving the chest during adolescence. Which aspect of her history is most relevant to the development of the malignancy?

Options:

Correct Answer:
Earlier therapeutic chest irradiation

Explanation: Significant prior irradiation involving breast tissue is an established risk factor for later breast carcinoma because radiation can produce carcinogenic DNA damage.

Question:

A 63-year-old woman has an irregular breast carcinoma associated with progressive inward displacement of the nipple. Which pathological change most directly produces this finding?

Options:

Correct Answer:
Fibrosis and traction on involved ducts

Explanation: Tumor-associated fibrosis shortens and pulls on involved lactiferous ducts, drawing the nipple inward and producing retraction.

Question:

A woman has a large breast carcinoma with extensive regional involvement and fixation to the chest wall. Imaging shows no distant metastasis. Which broad stage category best fits this presentation?

Options:

Correct Answer:
Stage III disease

Explanation: Extensive local or regional disease without distant metastasis is broadly classified as locally advanced stage III disease. Stage IV requires distant metastatic spread.

Question:

Ultrasound is performed on a 26-year-old woman with a mobile breast mass. Which combination of findings would most strongly support a benign fibroadenoma?

Options:

Correct Answer:
Oval, circumscribed and parallel to the skin

Explanation: A fibroadenoma commonly appears as an oval, well-circumscribed, relatively homogeneous lesion oriented parallel to the skin, reflecting its benign expansile growth.

Question:

A 57-year-old woman has a hard breast mass. Ultrasound shows a solid lesion. Which additional sonographic feature would increase suspicion of invasive malignancy?

Options:

Correct Answer:
Irregular non-parallel margins with acoustic shadowing

Explanation: Irregular margins, non-parallel orientation and posterior shadowing are suspicious sonographic features because invasive tumors infiltrate and distort surrounding tissue.

Question:

During diagnostic mammography, the radiographer compresses the breast before obtaining standard projections. What is the main imaging advantage of this maneuver?

Options:

Correct Answer:
It reduces tissue overlap and improves image detail

Explanation: Compression spreads breast tissue, reducing superimposition of structures and improving visualization of masses, distortion and calcifications.

Question:

A 48-year-old woman has an invasive breast carcinoma that is negative for estrogen receptor, progesterone receptor and HER2. Which therapeutic implication follows from this biological profile?

Options:

Correct Answer:
Endocrine and HER2-directed treatments lack their usual targets

Explanation: Triple-negative carcinoma lacks ER, PR and HER2. Therefore, endocrine therapy and HER2-directed therapy cannot act through their usual molecular targets.

Question:

A woman undergoes successful breast-conserving excision of an early invasive carcinoma with clear margins. Why is radiotherapy commonly incorporated into this local-treatment strategy?

Options:

Correct Answer:
To improve control of residual local microscopic disease

Explanation: After breast-conserving surgery, radiotherapy treats possible microscopic malignant foci remaining in the preserved breast and thereby improves local control.

Question:

A 56-year-old woman has an operable breast carcinoma, but the extent of disease makes satisfactory breast conservation unsuitable. Which local surgical principle is most appropriate?

Options:

Correct Answer:
Mastectomy as definitive local breast treatment

Explanation: Mastectomy is an appropriate local-treatment principle when breast conservation is unsuitable because of the extent or distribution of disease or other clinical factors.

Question:

A woman taking tamoxifen for hormone-sensitive breast cancer develops unilateral calf swelling and pain. Which drug-related complication should be considered most strongly?

Options:

Correct Answer:
Venous thromboembolism

Explanation: Tamoxifen increases the risk of venous thromboembolic events. New unilateral calf swelling in a patient taking tamoxifen should therefore raise concern for deep-vein thrombosis.

Question:

A postmenopausal woman without breast cancer has a sufficiently high predicted risk to justify pharmacological risk reduction. Which drug is another selective estrogen-receptor modulator that may be considered in selected women?

Options:

Correct Answer:
Raloxifene

Explanation: Raloxifene is a SERM and can reduce the risk of estrogen-receptor-positive breast cancer in appropriately selected postmenopausal women.

Question:

A student asks how tamoxifen can inhibit estrogen-dependent breast cancer while producing estrogen-like effects in selected other tissues. Which pharmacological property best explains this difference?

Options:

Correct Answer:
Tissue-selective estrogen-receptor agonism and antagonism

Explanation: SERMs have tissue-dependent receptor effects. Tamoxifen is mainly antagonistic in breast tissue but can exert partial estrogen-agonist actions in tissues such as bone and endometrium.

Question:

A 31-year-old woman with relatively dense breast tissue presents with a newly palpable focal abnormality. Which feature makes ultrasound particularly useful as part of her imaging assessment?

Options:

Correct Answer:
It characterizes focal lesions effectively in dense breast tissue

Explanation: Ultrasound is particularly useful for evaluating palpable abnormalities in younger women and dense breasts, where it can characterize the lesion without relying on X-ray tissue contrast.

Question:

During a community breast-health clinic, a clinician performs examination in an asymptomatic woman. Which contribution of clinical breast examination is most appropriate?

Options:

Correct Answer:
It may identify masses, nipple changes and regional nodes

Explanation: Clinical examination can detect palpable masses, skin or nipple abnormalities and lymphadenopathy, but it does not provide histology and does not replace appropriate imaging.

Question:

A woman with a very high inherited breast-cancer risk has not developed malignancy. Following specialist counseling, she elects to undergo risk-reducing breast surgery. Which level of prevention does this intervention represent?

Options:

Correct Answer:
Primary prevention

Explanation: Risk-reducing surgery is performed before cancer develops and therefore aims to prevent disease occurrence, making it a form of primary prevention.

Question:

Before discussing an abnormal breast-biopsy result, a doctor asks the patient, “What have you understood so far about the tests we performed?” Which component of the structured breaking-bad-news approach is being applied?

Options:

Correct Answer:
Perception

Explanation: The perception step assesses what the patient already knows or believes about the illness before new information is provided, allowing communication to be tailored appropriately.