Brenner tumors are uncommon surface-epithelial stromal cell tumors in which the epithelial cell (which defines these tumors) is a transitional cell. These are similar in appearance to bladder epithelia. The tumors may be very small to very large, and may be solid or cystic.referred chemotherapeutic agents include a platinum drug with a taxane. For surface epithelial-stromal tumors, the most common sites of metastasis are the pleural cavity (33%), the liver (26%), and the lungs (3%).
Pyogenic granuloma is one of the inflammatory hyperplasia seen in the oral cavity. The term is a misnomer because it is not related to infection and arises in response to various stimuli such as low-grade local irritation, traumatic injury, or hormonal factors.
The various current definitions of the granuloma are still based on histopathologic observations. The lesion is defined as a focal, chronic inflammatory tissue response composed mostly of macrophages and their derivatives the epithelioid cells, evoked by persistent, poorly degradable substances (1, 3, 9).