You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 20 year old male come to casuality with head injury. Examination reveals normal counsciousness, clinically normal and blood in the tympanic membrane, most likely cause is and explain in detail?
(Complete basilar fracture) (595 - 99- B & L 24th) (302-Baily & Love 25th)Extradural haemorrhage - Common in younger age group* Usually from haemorrhage of middle meningeal artery* **Lucid interval is characteristic* Surgery without delay is essentialSubdural haematoma - most common intracranial mass lesions resulting from head trauma* *Develop from tom bridging veins or cortical lacerations* More severe poorer out come* **CT - concave hyperdense collectionsBase of skull fractures|||Anterior Cranial Fossa FractureMiddle Cranial Fossa Fracture* Sub conjunctival haematoma* CSF rhinorrhoea* Carotico-cavemous fistula* Periorbital haematoma or "raccoon eyes"* CSF otorrhoea or rhinorrhoea* Haemotympanum ** Ossicular disruption* "Battle sign" (brushing behind the ear)* VII and VIII cranial nerve palsies