Background.We report a case of group B streptococcal septicemia of digestive origin with secondary bilateral breast dermal-hypodermal localization.Case report.A 71-year-old woman with a past history of bilateral breast cancer treated by conservation therapy was hospitalized because of the sudden occurrence of two clearly delimited,inflammatory,dermal-hypodermal cutaneous plaques located on each breast,associated with fever(39°C),4 days after a colonoscopy.Further investigations eliminated carcinomatous mastitis and blood cultures were positive for group B β-hemolytic streptococcus(Streptococcus agalactiae).Histological examination of a sigmoid polyp revealed a tubular adenocarcinoma.Discussion.We report the first documented case of secondary dermal-hypodermal bacterial skin infection(cellulitis)due to group B β-hemolytic streptococcus.The occurrence after colonoscopy examination,chronology of clinical features,bilaterality and positive blood cultures are arguments in favor of the secondary nature of the skin infection process.
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