Squamous mucosa

The Pathology Dictionary Team
March 8, 2023

What is squamous mucosa?

Squamous mucosa is a thin layer of tissue that covers the surface of various parts of the body, including the mouth, esophagus, vagina, cervix, and anus. It is also found in the respiratory tract, where it lines the nasal cavity, pharynx, larynx, trachea, and bronchi. Squamous mucosa is designed to protect the tissue below from physical injury and infection.

What types of cells are normally found in squamous mucosa?

Squamous mucosa is made up of different parts. The top layer is made up of specialized squamous cells which connect together to form a barrier called the epithelium. Below the epithelium is a thin layer of tissue called lamina propria which contains connective tissue and blood vessels. In some areas of the body, the mucosa also includes a thin layer of muscle called the muscularis mucosae which sit just below the lamina propria.

Where is squamous mucosa normally found in the body?

Squamous mucosa can be found in various parts of the body, including the mouth, esophagus, vagina, cervix, and anus. It is also found in the respiratory tract, where it lines the nasal cavity, pharynx, larynx, trachea, and bronchi.

Is squamous mucosa normal?

Yes. Squamous mucosa is normally found in many parts of the body including the mouth, esophagus, respiratory tract, vagina, cervix, and anus. The thickness and properties of the squamous mucosa may vary depending on the location in the body and the specific functions it serves in that location.

What does it mean if the squamous mucosa is described as reactive?

Reactive means that the cells in the squamous mucosa have been injured and look abnormal when examined under the microscope. The injury can be caused by infection, physical stress, or exposure to chemicals or medications. Reactive does not mean cancer.

What is the most common type of cancer to start from squamous mucosa?

Squamous cell carcinoma is the most common type of cancer to develop from squamous mucosa. It starts from the squamous cells in the epithelium.