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Cutaneous Metastasis of Adenocarcinoma of the Ampulla of Vater.
American Journal of Dermatopathology 2018 April 18
Cutaneous metastases from an adenocarcinoma of the Ampulla of Vater are very rare, with only a few cases previously reported. We present here an additional case in a 57-year-old woman who complained of a painful growth on her frontal scalp that she had noticed 4 months earlier. Her medical history included an ampullary adenocarcinoma, which was diagnosed 4 years ago, excised through a Whipple procedure, and treated using chemotherapy and radiotherapy. The scalp biopsy showed a dermal and epidermotropic well-differentiated glandular neoplasm with abundant neutrophils within the luminae of the tumoral glands. The tumor failed to express p63 and cytokeratin 5/6, whereas it was intensively positive for CK7 and E-cadherin. CDX2 expression was weak and focal. The immunohistochemical expression of DNA mismatch-repair proteins (MSH2, MSH6, MLH1, and PMS2) was preserved. Despite oncological treatment, the patient developed multiple cutaneous metastases during the ensuing several months, and eventually died 6 years after her initial diagnosis with widespread metastases.
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