A 35-year-old woman presents with painless lump in the upper outer quadrant of her left breast forthe last 8 months. On examination, the lesion is ill-defined, firm, and 3.0 cm in its widest diameter.An enlarged and non-tender axillary lymph node is also palpable. An excision biopsy of her breastlesion is done.Refer to slide #1. Why is her breast lesion ill-defined?2. Illustrate the tumor in the slide. Give is your diagnosis and state your microscopic basis.263. What is the most likely microscopic finding of her axillary node?4. What gene mutations can be associated with familial cases of this neoplasm?
Question
A 35-year-old woman presents with painless lump in the upper outer quadrant of her left breast forthe last 8 months. On examination, the lesion is ill-defined, firm, and 3.0 cm in its widest diameter.An enlarged and non-tender axillary lymph node is also palpable. An excision biopsy of her breastlesion is done.Refer to slide #1. Why is her breast lesion ill-defined?2. Illustrate the tumor in the slide. Give is your diagnosis and state your microscopic basis.263. What is the most likely microscopic finding of her axillary node?4. What gene mutations can be associated with familial cases of this neoplasm?
Solution
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The breast lesion is ill-defined because it lacks clear boundaries or distinct edges. This can be indicative of infiltrative growth, where the tumor cells invade and spread into the surrounding breast tissue.
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Referring to slide #1, the tumor appears as an irregular mass in the upper outer quadrant of the left breast. It is firm and measures approximately 3.0 cm in its widest diameter. Based on these characteristics, my diagnosis would be a breast carcinoma. The microscopic basis for this diagnosis would involve examining the tissue sample under a microscope to observe the presence of malignant cells, their arrangement, and any other specific features that are characteristic of breast carcinoma.
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The most likely microscopic finding in her axillary node would be the presence of metastatic tumor cells. Since an enlarged and non-tender axillary lymph node is palpable, it suggests that the tumor has spread to the lymph nodes in the axilla. Microscopic examination of the lymph node would reveal the presence of tumor cells within the lymph node tissue.
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Familial cases of this neoplasm can be associated with certain gene mutations. Some of the gene mutations that can be linked to familial cases of breast carcinoma include mutations in the BRCA1 and BRCA2 genes. These mutations are known to increase the risk of developing breast and ovarian cancers.
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