A case of retropharyngeal abscess caused by Mycobacterium fortuitum in immunosuppressive child

Abstract

The incidence of retropharyngeal abscess has decreased due to advances in antibiotics treatment.
We observed a case of retropharyngeal abscess in a 10-year-old male with autoimmune hepatitis, who had been treated with steroids and immunosuppressive drugs.
We performed incisional drainage of the abscess orally. Mycobacterium fortuitum was detected from aspirated pus within the abscess.
We successfully treated this patient with combined antibiotics appropriately sensitive to Mycobacterium fortuitum.
This is the first case report of retropharyngeal abscess caused by Mycobacterium fortuitum.
Similar condition could occur as a complication in immunosuppressive patiant.