Background: Human dirofilariosis is endemic in southern France. The causal agent is Dirofilaria repens transmitted to man by mosquitos. The human organism is an accidental host while the dog is the reservoir. Approximately 60 cases have been reported in France, mainly in southern continental areas and Corsica. Most cases involve subcutaneous and occular manifestations.
Case report: A 47-year old woman living in the Var department in southern france consulted for a subcutaneous nodule with the aspect of an epidermoid cyst. At incision, the nodule was found to contain a helminth found at parasite examination to be Dirofilaria repens.
Discussion: The prevalence of endemic subcutaneous dirofilariosis is probably underestimated as the clinical expression is non-specific and spontaneous cure is common. The diagnosis of epidermoid cyst is frequently suggested. History taking does not reveal travel to intertropical areas. The helminth is discovered when the nodule is opened, also providing successful cure.