ArticleCase reports in oncology
Polypoid Malignant Melanoma with Spontaneous Decapitation Showing Favorable Prognosis: A Case Report.
Article in Case reports in oncology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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8 authors at 1 institution in 1 country.
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Abstract
Introduction: Regression of malignant melanoma (MM) is a commonly observed phenomenon, which refers to disappearance or loss of all or part of MM. It can be identified both clinically and histologically, and high probability of histological regression of MM (10-58%) has been reported. However, the decapitation of skin tumor has rarely been described in the English literature, and decapitation in MM has not been reported. Here, we report the case of polypoid MM with spontaneous decapitation. Case Presentation: An 81-year-old Japanese woman was referred to our hospital due to a polypoid nodule on her cheek. She was diagnosed with MM at stage IIC (T4bN0M0) by histological examinations. Three weeks after the biopsy, the nodule decapitated spontaneously without bleeding, and an ulcer developed on the base of the polypoid nodule. The histological examination of the additionally resected ulcerative lesion under the nodule revealed infiltration of T cells mainly composed of CD8⁺ natural killer T cells. No recurrence or metastasis has been observed for 4 years. Conclusion: This is the first case report of polypoid MM with spontaneous decapitation, which may be attributed to natural killer T cells. Moreover, this case shows favorable prognosis, while it is said that the regression in thick MM does not have prognostic advantage and polypoid topography has been reported to be related to extremely poor prognosis. Further investigations are needed to evaluate the prognostic advantage of decapitation in MM and other skin tumors.
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