PT - JOURNAL ARTICLE AU - McDonald, Michael H. AU - Hoffman, Matthew R. AU - Gentry, Lindell R. TI - When Is Fluid in the Mastoid Cells a Worrisome Finding? AID - 10.3122/jabfm.2013.02.120190 DP - 2013 Mar 01 TA - The Journal of the American Board of Family Medicine PG - 218--220 VI - 26 IP - 2 4099 - http://www.jabfm.org/content/26/2/218.short 4100 - http://www.jabfm.org/content/26/2/218.full SO - J Am Board Fam Med2013 Mar 01; 26 AB - Mastoiditis is a common clinical entity that is technically present in all cases of otitis media; only a minority of cases actually represents the otolaryngologic emergency of acute coalescent mastoiditis. When reviewing an image with a radiologic diagnosis of mastoiditis, looking for key signs such as destruction of bony septa and considering patient presentation can help distinguish mild mastoiditis from acute coalescent mastoiditis.