BACKGROUND: The histologic status of squamous cell carcinoma in situ (SCC-IS) after diagnostic biopsy has not been well described or compared between immunocompetent and immunosuppressed patients. Expression of immunohistochemical (IHC) markers of aggressive SCC has not been compared between SCC-IS that clears or becomes invasive after biopsy. OBJECTIVE: To determine the histologic status of SCC-IS after diagnostic biopsy in these populations. METHODS: Retrospective analysis of 129 patients with SCC-IS treated with excision and 55 patients treated with Mohs surgery. Histologic features of SCC in excised tissue after biopsy were recorded. Known SCC markers were evaluated using IHC. RESULTS: Invasive SCC was found in 3% to 16% of residual SCC-IS depending on surgical treatment modality. The history of skin cancer increased the odds of having invasive SCC in SCC-IS excisions (odds ratio 7.1, p
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Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,00306932607174,alsfakia@gmail.com,
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