In Schizophrenia early onset with poor prognosis is seen in
**Core Concept**
Early-onset schizophrenia, typically defined as onset before the age of 18, is a subtype of schizophrenia characterized by a more severe clinical course and poorer prognosis compared to late-onset schizophrenia. This is attributed to the ongoing neurodevelopmental processes during adolescence and early adulthood, which may exacerbate the underlying pathophysiological mechanisms of schizophrenia.
**Why the Correct Answer is Right**
Early-onset schizophrenia is associated with a more rapid progression of symptoms, increased risk of treatment-resistant illness, and higher rates of comorbid psychiatric and medical conditions. Studies have shown that individuals with early-onset schizophrenia exhibit abnormalities in brain structure and function, including reduced volume of the hippocampus and prefrontal cortex, as well as altered activity in the default mode network. These neurobiological changes may contribute to the more severe clinical presentation and poorer prognosis seen in this subgroup.
**Why Each Wrong Option is Incorrect**
**Option A:** While childhood trauma is a risk factor for the development of schizophrenia, it is not directly associated with early-onset schizophrenia or poor prognosis.
**Option B:** Schizophrenia in first-degree relatives is a risk factor for schizophrenia, but it does not specifically predict early onset or poor prognosis.
**Option C:** Social isolation is a common feature of schizophrenia, but it is not a direct predictor of early onset or poor prognosis.
**Clinical Pearl / High-Yield Fact**
Early-onset schizophrenia often presents with a more abrupt onset of symptoms, including sudden changes in behavior, mood, or cognitive function, and may be accompanied by prominent psychotic features, such as hallucinations or delusions.
**Correct Answer: A. Early-onset schizophrenia, typically defined as onset before the age of 18, is a subtype of schizophrenia characterized by a more severe clinical course and poorer prognosis compared to late-onset schizophrenia.**