[Neck pyomyositis associated with polymicrobial sepsis of sinusal origin].

Spontaneous pyomyositis (primary pyomyositis) is an infrequent disease in non-tropical countries, caused by bacterial infection of skeletal muscle. Although pyomyositis is associated in many cases to septicemia, the occurrence of that disease as a secondary manifestation of bacteremia is very unusual, requiring a high-grade index of suspicion to diagnose it in the early stages. We present one case of cervical pyomyositis, caused by Fusobacterium necrophorum and group F streptococcus, during the course of a sepsis of sinusal origin, that was treated without surgical therapy. This so uncommon form of presentation of Fusobacterium septicemia, its diagnosis and treatment are discussed.