An alcoholic presents with complaints of loss of memory of recent events, impaired insight, confabulation, and dementia of few months duration. The patient is suffering from :
**Core Concept**
Alcohol-induced dementia, also known as Korsakoff's syndrome, is a neurological disorder caused by chronic alcohol abuse and thiamine deficiency, leading to damage in the brain's temporal and diencephalic regions. This results in impaired memory, especially anterograde amnesia, and other cognitive deficits.
**Why the Correct Answer is Right**
The patient's symptoms are characteristic of Korsakoff's syndrome, which is a result of the brain's inability to form new memories due to thiamine deficiency and subsequent damage to the hippocampus and surrounding areas. This condition is often seen in chronic alcoholics who have a poor diet and malabsorb essential nutrients, including thiamine. The impaired insight and confabulation are also classic features of this condition, as the patient may try to fill in gaps in their memory with fabricated information.
**Why Each Wrong Option is Incorrect**
**Option A:** Wernicke's encephalopathy is a related condition that presents with acute onset of confusion, ataxia, and ophthalmoplegia, but it does not typically cause the chronic memory loss and dementia seen in Korsakoff's syndrome.
**Option B:** Alzheimer's disease is a different type of dementia that is characterized by gradual decline in cognitive function, but it is not directly related to alcohol abuse or thiamine deficiency.
**Option C:** Normal-pressure hydrocephalus is a condition that presents with the triad of gait disturbance, dementia, and urinary incontinence, but it is not typically seen in chronic alcoholics.
**Clinical Pearl / High-Yield Fact**
It's essential to note that Korsakoff's syndrome often co-occurs with Wernicke's encephalopathy, and early recognition and treatment of thiamine deficiency can prevent the progression to Korsakoff's syndrome.
**Correct Answer:** C