An adult hypertensive male presented with sudden onset severe headache and vomiting. n 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 symptoms are suggestive of a subarachnoid hemorrhage (SAH), which is a life-threatening condition characterized by bleeding into the space between the brain and the tissue that covers it (the subarachnoid space). SAH often presents with sudden onset of severe headache, vomiting, and neck rigidity due to irritation of the meninges.
**Why the Correct Answer is Right**
The correct answer is related to the underlying pathology of SAH, which is often caused by the rupture of an aneurysm in the brain. The aneurysm rupture leads to bleeding into the subarachnoid space, causing irritation of the meninges and resulting in symptoms such as headache, vomiting, and neck rigidity. The absence of focal neurological deficits suggests that the bleeding is not causing significant damage to the brain tissue itself.
**Why Each Wrong Option is Incorrect**
**Option A:** This option might be tempting, but it is incorrect because while migraines can cause severe headache and vomiting, they do not typically cause neck rigidity or bleeding into the subarachnoid space.
**Option B:** This option is also incorrect because while meningitis can cause symptoms such as neck rigidity and headache, it is typically accompanied by fever, altered mental status, and other signs of infection.
**Option C:** This option is incorrect because while intracerebral hemorrhage can cause severe headache and vomiting, it typically presents with focal neurological deficits due to damage to the surrounding brain tissue.
**Option D:** This option is incorrect because while hypertensive encephalopathy can cause headache and vomiting, it does not typically cause neck rigidity or bleeding into the subarachnoid space.
**Clinical Pearl / High-Yield Fact**
The "thunderclap headache" is a classic description of the sudden onset of severe headache associated with SAH. This type of headache is often described as the worst headache of the patient's life and is a key clinical clue to the diagnosis of SAH.
**Correct Answer:** C.