What are the most common masses found in the body of the lateral ventricle in children aged 0-10 years, and what are their key diagnostic features?

The most common masses in the lateral ventricle body for children aged 0-10 years include Primitive Neuroectodermal Tumor (PNET), Teratoma, and Choroid Plexus Papilloma. PNETs often present with heterogeneous enhancement and can cause hydrocephalus due to obstruction. Teratomas may contain calcifications and fat, appearing heterogeneous on imaging. Choroid Plexus Papillomas are highly vascular, enhancing lesions that can lead to overproduction of cerebrospinal fluid. A common pitfall is mistaking a PNET for an ependymoma, which typically arises from the fourth ventricle.