Actinomyces and Shewanella algae complicated paediatric mastoiditis: a case report of a multidisciplinary approach

Cerebral venous sinus thrombosis in children is a rare complication of acute mastoiditis that can potentially be fatal. Clinical expertise is essential for early diagnosis and management due to its subtle course. We present the first known case of paediatric acute mastoiditis with venous sinus thrombosis caused by 
 
 Shewanella algae
 
 and 
 
 Actinomyces europaeus
 
 .
 A 17-year-old male presented clinical signs of right acute otitis media and mastoiditis. Brain computed tomography showed mastoid opacification, cerebral sinus thrombosis and an extradural collection. Microbiology revealed the presence of 
 
 S. algae
 
 and 
 
 A. europaeus
 
 . A multidisciplinary approach combining medical and surgical treatment allowed the patient to make a full recovery.