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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