What causes gigantism?

Explanation

**Step-by-Step Solution:**

1. **Understanding Gigantism**: Gigantism is a medical condition characterized by excessive growth and height. It is classified as a disorder.

2. **Hormonal Cause**: The primary cause of gigantism is the oversecretion of the growth hormone, also known as somatotropin or somatotrophic hormone (STH).

3. **Timing of Secretion**: This oversecretion of growth hormone occurs before puberty. The timing is crucial because it affects the growth plates in bones.

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