Carcinoid tumors are neuroendocrine tumors composed of uniform, round, or polygonal cells.

Oncocytoma, a tumour composed of oncocytes, may be found as a less common salivary gland neoplasm also known as Oxyphilic Adenoma.

These tend to be cavernous hemangiomas, which are sharply defined, sponge-like tumors composed of large, dilated, cavernous vascular spaces.

Phyllodes tumors are a fibroepithelial tumor composed of an epithelial and a cellular stromal component.

An oncocytoma is an epithelial tumor composed of oncocytes, large eosinophilic cells having small, round, benign-appearing nuclei with large nucleoli.

Fibroadenoma of the breast is a benign tumor composed of two elements : epithelium and stroma.

The most common disease of GH excess is a pituitary tumor composed of somatotroph cells of the anterior pituitary.

It is a heterogeneous tumor composed of three different cell populations.

Approximately 98% of lung cancers are carcinoma, which are tumors composed of cells with epithelial characteristics.

A lipoma is a benign tumor composed of adipose tissue (body fat).