Question

A 65 year old male is brought to the outpatient clinic with a one year illness marked by forgetfulness, visual hallucinations, suspiciousness, personality decline, poor self care and progressive deterioration in his condition. His Mini Mental Status Examination (MMSE) score is 10. What is his most likely diagnosis?

• A. Dementia
• B. Schizophrenia
• C. Mania
• D. Depression

Hint:

Progressive memory loss over a year with a low MMSE score in an elderly patient points to dementia.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
An elderly man has a slow, one-year decline: memory loss, visual hallucinations, suspiciousness, a change in personality, loss of self-care, and steady worsening. His MMSE score of 10 out of 30 shows severe cognitive impairment.

Step 2: Key Concept:
Dementia is a chronic, progressive decline in memory and other cognitive functions (language, judgement, self-care) that is severe enough to affect daily living. It commonly starts after age 60 and can carry behavioural features like hallucinations, suspiciousness, and personality change, especially in dementia with Lewy bodies or Alzheimer's disease with psychotic features.

Step 3: Detailed Explanation:
The one-year time course of steady decline, the low MMSE score, and the mix of memory loss with visual hallucinations and personality change all point to a primary cognitive disorder of old age, that is, dementia.
Schizophrenia usually starts in young adulthood and its psychotic features are not typically driven by progressive memory loss with a falling MMSE.
Mania causes elevated mood, high energy, and reduced need for sleep, not progressive forgetfulness and cognitive decline.
Depression can cause forgetfulness in the elderly (pseudodementia), but it does not usually cause visual hallucinations, and the MMSE typically improves once the mood disorder is treated, unlike the steady deterioration seen here.

Step 4: Final Answer:
The most likely diagnosis is dementia.
\[ \boxed{\text{Dementia}} \]