These are usually malignant tumors which arise in children and are formed of malignant cells that resemble the embryonic cells which are initially present in the particular part of the body from which the tumor arises.
These tumors are:
- Nephroblastoma (Wilm’s tumor) in kidney.
- Neuroblastoma in adrenal medulla.
- Medulloblastoma in cerebellum.
- Retinoblastoma in Retina.