ArticleCureus2025
Common Diseases Presenting in an Uncommon Way: Metastatic Small-Cell Lung Carcinoma Mimicking Merkel Cell Carcinoma.
Article in Cureus, 2025. 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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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1 author.
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Abstract
A 65-year-old Caucasian woman presented with a rapidly enlarging, painless forehead lesion initially presumed to be Merkel cell carcinoma (MCC). Originating as a 3 mm pink papule, the lesion expanded to over 12 mm within six months. Subsequent histopathologic and radiologic evaluation revealed it to be the initial manifestation of metastatic small-cell lung carcinoma (SCLC). Despite undergoing surgical resection under the presumption of localized MCC, advanced imaging later identified a primary pulmonary neoplasm with diffuse metastatic spread. Histologically, both MCC and SCLC are characterized by poorly differentiated neuroendocrine morphology, complicating clinical distinction. Cutaneous metastases from SCLC, although rare, can deceptively mimic primary neuroendocrine skin neoplasms, as exemplified in this case. This diagnostic pitfall underscores the imperative for comprehensive staging prior to initiating definitive therapy, as incomplete evaluation may precipitate unnecessary surgical intervention and delay optimal systemic treatment.
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