A 58-year-old man with a 15-year history of uncontrolled hypertension (BP 180/110 mmHg at home) presents to the emergency department with sudden onset severe occipital headache, vomiting, and neck stiffness. His wife reports he collapsed while watching television 2 hours ago. On examination, he is drowsy (GCS 13/15), has bilateral Babinski signs, and complains of photophobia. Non-contrast CT head shows a hyperdense lesion in the basal ganglia region with intraventricular extension. What is the most likely location of the primary hemorrhage?

Explanation

## Diagnosis: Hypertensive Intracerebral Hemorrhage (ICH) ### Anatomical Localization in Hypertensive ICH **Key Point:** Chronic hypertension damages small penetrating arteries (lipohyalinosis), leading to rupture at characteristic sites. The basal ganglia (putamen/external capsule) accounts for 50–60% of hypertensive ICH cases. ### Distribution of Hypertensive ICH | Location | Frequency | Artery | Clinical Features | |----------|-----------|--------|-------------------| | **Basal ganglia (putamen/ext. capsule)** | 50–60% | Lenticulostriate aa. | Contralateral hemiparesis, hemisensory loss, aphasia (if dominant) | | Thalamus | 15–20% | Thalamoperforating aa. | Vertical gaze palsy, sensory loss, altered consciousness | | Pons (brainstem) | 5–10% | Pontine perforators | Pinpoint pupils, locked-in state, respiratory failure | | Cerebellum | 5–10% | PICA | Ataxia, headache, hydrocephalus risk | | Lobar (cortical) | 10–20% | Cortical branches | Often associated with amyloid angiopathy (elderly), anticoagulation | ### Clinical Correlation in This Case **High-Yield:** The triad of sudden severe headache + intraventricular extension + basal ganglia location on imaging is pathognomonic for hypertensive putaminal hemorrhage. - **Bilateral Babinski signs** → deep midline/brainstem involvement from mass effect and IVH - **Drowsiness (GCS 13)** → increased intracranial pressure from IVH - **Photophobia + neck stiffness** → meningeal irritation from blood in CSF - **Lenticulostriate artery rupture** (supplies putamen) is the classic vessel in uncontrolled hypertension **Clinical Pearl:** IVH is a poor prognostic sign in ICH; it indicates large primary hemorrhage and increased mortality risk. Urgent neurosurgical evaluation for possible external ventricular drain (EVD) placement is indicated. ### Management Priorities 1. **Acute phase:** BP control (target MAP reduction 15–20% in first hour; avoid aggressive lowering), airway protection, ICP monitoring 2. **Imaging:** CT angiography to exclude secondary causes (AVM, aneurysm, tumor) 3. **Surgical consideration:** EVD if IVH with hydrocephalus; hematoma evacuation if volume >30 mL and accessible **Warning:** Do not confuse lobar ICH (which suggests amyloid angiopathy in elderly or anticoagulation) with basal ganglia ICH (which is hypertensive). The imaging location is diagnostic.