Internal pyocephalus, also known as intracranial abscess, refers to the accumulation of pus within the cranial cavity. This condition can result from severe infections, trauma, or underlying medical conditions. Though less commonly used, the term "intracranial abscess" is a synonym for internal pyocephalus. Both terms describe the same pathological condition where pus accumulates within the skull, often leading to increased intracranial pressure and potential damage to the brain. Prompt medical intervention is crucial in managing and treating internal pyocephalus or intracranial abscess to prevent further complications and minimize the risk of long-term neurological damage.