An adult hypeensive male presented with sudden onset severe headache and vomiting. On examination, there is marked neck rigidity and no focal neurological deficit was found. The symptoms are most likely d/t
**Core Concept**
The patient's presentation is suggestive of a non-traumatic, non-infectious cause of sudden onset severe headache, often referred to as a **hypertensive intracranial hemorrhage** or **hypertensive intracerebral hemorrhage**. This condition is a medical emergency and occurs due to the rupture of small blood vessels in the brain, leading to bleeding into the surrounding brain tissue.
**Why the Correct Answer is Right**
The patient's symptoms, including severe headache, vomiting, marked neck rigidity (nuchal rigidity), and the absence of focal neurological deficits, are consistent with a subarachnoid hemorrhage (SAH). SAH occurs when there is bleeding into the space surrounding the brain, known as the subarachnoid space. The sudden increase in intracranial pressure and the release of blood and its breakdown products into the cerebrospinal fluid (CSF) cause irritation of the meninges, leading to the characteristic symptoms of SAH, including severe headache, vomiting, and neck rigidity. The absence of focal neurological deficits suggests that the bleeding has not directly involved a specific area of the brain.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a **stroke** typically presents with focal neurological deficits, such as weakness, numbness, or paralysis, which are not present in this case.
**Option B:** This option is incorrect because **migraine** typically presents with a gradual onset of symptoms, including headache, but without the sudden onset and marked neck rigidity seen in this case.
**Option C:** This option is incorrect because **meningitis** typically presents with fever, altered mental status, and other signs of infection, which are not present in this case.
**Clinical Pearl / High-Yield Fact**
The classic description of the onset of a subarachnoid hemorrhage is the "thunderclap headache," which is a sudden, severe headache that reaches its maximum intensity within one minute. This is a key clinical clue to the diagnosis of SAH.
**Correct Answer: C.**