Reactive lesions of the oral cavity are non-neoplastic proliferations occurring due to chronic irritation. Peripheral ossifying fibroma (POF) is a reactive lesion usually occurring on the interdental ...

Gorlin syndrome is a rare condition. Many people with Gorlin syndrome develop a type of skin cancer called basal cell cancer of the skin. They can also have a number of other medical conditions.

Several layers of tissue make up each part of the nasal cavity and paranasal sinuses. Each layer contains many different types of cells. Different cancers can develop from each type of cell.