An inflammation or infection of the internal structures within the mastoid bone, which is located behind the ear.
Combination of 'endo-' (within), 'mastoid' (the temporal bone behind the ear), and '-itis' (inflammation). The term developed in medical terminology to distinguish internal mastoid infections from other ear infections.
This condition is actually quite dangerous because the mastoid bone is honeycombed with tiny air cells that can trap infection and spread it toward the brain, making it a medical emergency that requires prompt antibiotics.
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