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Summary BACKGROUND: Pilonidal sinus disease (PSD) may be present as chronic PSD, which may eventually exacerbate. Factors associated with the progression of chronic PSD to acute abscess-forming PSD were investigated. METHODS: Records of 1962 patients admitted to the surgical departments of three hospitals of the German Armed Forces between 1980 and 1996 with PSD were analyzed. RESULTS: Patients with...
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