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The degree of cell proliferation in a tumor is often associated with metastatic risk and mortality. Proliferating cell nuclear antigen (PCNA) and Ki-67 are proliferation markers that can be used to assess malignant potential in cutaneous lesions and pathological cell proliferation in psoriasis. These markers are elevated during periods of cell proliferation; however, they are also upregulated following UV irradiation. This upregulation may be problematic, as many skin lesions are subject to sun exposure in an everyday setting.


Carmen Castilla, Patrick McDonough, Gizem Tumer, Peter C Lambert, W Clark Lambert. Sometimes it takes darkness to see the light: pitfalls in the interpretation of cell proliferation markers (Ki-67 and PCNA). Skinmed. 2012 Mar-Apr;10(2):90-2

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PMID: 22545323

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