What the CT Scan Found

1. Possible Acute Brain Infarct (Stroke) — Right Side

• The brain tissue in this area appears swollen — it is pressing on and partially collapsing the overlying folds (sulci) and the right lateral ventricle (fluid-filled space inside the brain).
• This pattern is typical of an acute ischemic stroke — a blood vessel supplying this region is likely blocked, causing brain cells to start dying from lack of oxygen.
• The radiologist has advised a DW-MRI (Diffusion-Weighted MRI), which is the gold standard for confirming acute stroke, as plain CT can miss early infarcts.

2. Old Brain Damage — Left Side (Encephalomalacia)

3. Brain Shrinkage (Cerebral Atrophy) — Abnormal for Age 46

• Cerebellar atrophy is also noted — the cerebellum (balance/coordination center) has shrunk as well.
• This may be due to chronic alcohol use, long-standing hypertension, metabolic causes, or repeated small strokes over time.

4. Chronic Hypertensive/Ischemic White Matter Changes

5. Other Findings (Less Critical)

• Deviated nasal septum with spur touching the left inferior turbinate — nasal bone abnormality, not brain-related.
• Sinusitis in left maxillary and right sphenoid sinuses.
• Mega cisterna magna — a normal variant (enlarged fluid space at the back of the skull), generally benign.
• No midline shift — the brain has not shifted to one side, which is a relatively reassuring sign.
• Brainstem is normal — critical for basic survival functions (breathing, heart rate).

Summary of the Whole Picture

• An acute ischemic stroke (right parietal lobe + right capsuloganglionic region) — the likely cause of his current unconsciousness and weakness
• Old left-sided brain damage from a prior event
• Premature diffuse brain atrophy — his brain has aged faster than his body
• Chronic small vessel disease from long-standing hypertension

Chances of Survival

• The brainstem is normal — this is the most important positive sign. Brainstem controls breathing and heartbeat; its preservation is key to survival.
• There is no midline shift — the brain is not herniating, which would be life-threatening.

• The right capsuloganglionic area is a critical motor pathway — damage here causes severe, often permanent left-sided paralysis
• He already has prior left-sided brain damage
• Age-inappropriate brain atrophy means the brain has limited reserve
• Chronic hypertensive damage adds to the overall burden

• Short-term survival (in-hospital): With good ICU/stroke unit care, many patients with this pattern survive the acute phase. The absence of herniation and brainstem involvement improves odds. Rough estimate: 60–75% survival through the acute phase, heavily dependent on treatment speed (thrombolysis/thrombectomy if within the time window), blood pressure control, and complications.
• Functional recovery: Likely to have significant left-sided weakness/paralysis long-term given the capsuloganglionic involvement.

When Will He Regain Consciousness?

1. Whether this is truly an acute stroke — the DW-MRI is needed to confirm. If confirmed and treated urgently (clot-busting drugs within 4.5 hours, or mechanical thrombectomy within 6–24 hours), there is potential for faster recovery.
2. Size and depth of the infarct — the deeper the damage (capsuloganglionic), the longer and less complete the recovery.
3. Whether swelling (cerebral edema) increases — stroke causes swelling in the first 24–72 hours. Swelling peaks at 48–72 hours and then begins to resolve. Consciousness may improve after this peak.

• If treatment is started promptly and no complications arise, some improvement in arousal/consciousness can occur within 24–72 hours
• Full return to consciousness may take days to weeks
• Some patients with this extent of damage remain in a state of reduced consciousness for weeks, requiring rehabilitation

Most Urgent Action Needed RIGHT NOW

Get a DW-MRI immediately. The radiologist explicitly advises this. It will confirm whether this is an acute stroke and how much brain tissue is salvageable. Every minute counts in a stroke — the sooner treatment begins, the better the outcome. The treating neurologist/neurosurgeon must be informed urgently.