Skin lesion of the thigh as a metastatic expression of breast neoplasia.
GC84-4
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Keywords

Breast cancer
Cutaneous metastasis

Abstract

An 87-year-old woman, diagnosed with stage IIIA invasive carcinoma of the left breast (T3N2M0) 8 months ago, under hormone treatment (refused surgery), presented to the emergency service with nodular skin lesions on the abdomen and right thigh with 2 months of evolution (Figure 1), very painful, requiring daily analgesia with non-steroidal anti-inflammatory drugs (NSAIDs); and decreased urine output for 1 week. The patient was hospitalized for severe oliguric acute kidney injury with metabolic acidemia, in the context of excessive consumption of NSAIDs and for clarification of skin lesions. Skin biopsy was performed, with anatomopathological examination suggesting infiltration of the dermis by malignant neoplasm with characteristics of breast carcinoma. Re-staging showed no metastasis to other organs. Despite fluid therapy, the patient had an unfavorable clinical evolution, and was not considered a candidate for renal function support therapy, and died following renal dysfunction and metabolic acidosis. Cutaneous involvement by neoplasms is uncommon - 0.5 to 9% of cases [1; 2]. In relation to breast cancer, cutaneous metastases occur in only 2% of patients and are an indicator of poor prognosis [1; 2], as in the case described. When present, metastasization occurs by continuity, and is most often seen in the thorax [1]. In the present case, metastases were found in the abdomen and lower limb, which are less typical sites; the exuberance of the skin lesions is also noteworthy.
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