At what age does thickened corpus callosum start to improve?

In general, enlargement of the corpus callosum begins to improve around the age of two. The details are as follows:

The corpus callosum is a broad band of nerve fibers connecting the left and right cerebral hemispheres. On the mid-sagittal section of the brain, it appears arched in shape: its anterior end near the lamina terminalis is called the rostrum; the curved portion is known as the genu; the central part is referred to as the body (or trunk); and the posterior part is the splenium. Enlargement of the corpus callosum is usually related to a child's growth and development. In early childhood, the brain and nervous system are still undergoing rapid development, including maturation of the corpus callosum. As the child grows, around the age of two, brain structures gradually mature, and the size of the corpus callosum may progressively normalize.

It should be noted that if corpus callosum enlargement persists and is accompanied by symptoms or discomfort, parents should promptly seek medical evaluation for the child and follow standardized treatment under the guidance of a physician.