All neoplasms have a parenchyma and a stroma.
    (1)   Tumor parenchymal
The parenchyma comprises the neoplastic proliferation cells,
parenchyma expressed tumor origin
parenchymal morphology underlies the name assigned to a neoplasm,
 parenchymal behaviour determines whether a neoplasm is benign or malignant. 
(2)   Tumor stroma
The stroma comprises the supporting connective tissue and blood supply that allows the neoplasm .....

A teratoma is a type mixed tumor made up of various kinds of tissue representing the three primitive layers of blastoderm, the neoplastic tissues ....