Most common site of metastasis in breast cancer is?

Appeared in: HPSSC - 2015

Explanation

Bone is the most frequent and primary site for breast cancer metastasis.
The common pattern of spread is Bone, followed by Lungs, Liver, and then Brain.
This is explained by the 'seed and soil' theory, where circulating cancer cells (the 'seed') find a favorable microenvironment (the 'soil') in the bone marrow to proliferate.
Bone metastases are a major clinical problem in patients with breast cancer.

Option B: While the lungs are a common site for metastasis, they are typically the second most common site after bone.
Option C: Brain metastases are significantly less common than bone or lung metastases and usually occur later in the progression of advanced breast cancer.
Option D: The liver is another common site, but it ranks third in frequency after bone and lungs.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Breast Cancer Metastasis as background academic context rather than a clinical decision trigger.
Nurses must be vigilant in assessing breast cancer patients for signs of bone metastasis, such as new, persistent pain (especially in the back or hips), which could indicate a risk of pathologic fracture or spinal cord compression.
Patient education is a key nursing responsibility. Nurses should teach patients to report symptoms like bone pain, shortness of breath, jaundice, or neurological changes immediately, as these could signify metastatic disease.
What if? If a patient with a history of breast cancer presents with confusion, nausea, and constipation, the nurse should have a high index of suspicion for hypercalcemia, a metabolic emergency often caused by bone metastasis, and escalate care for urgent intervention.

How to Approach the Question

This is a factual recall question testing knowledge of oncology.
First, identify the key concepts in the question: 'breast cancer' and 'most common site of metastasis'.
Recall the typical metastatic cascade or pattern of spread for breast cancer.
Systematically compare the given options (Bone, Lungs, Brain, Liver) against the known order of frequency.
Select the site that is established in clinical literature as the most frequent destination for metastatic breast cancer cells.

Concept Tested & Keywords

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E6 Gynecology Williams p. 307-377

E6 Medicine Davidson Principles Practice 24e p. 1348-1350

Practise the full HPSSC - 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.