calculi) is the Latin word for pebble.
- Stone, tonsil
A tiny stone (calculus) in the tonsils. These stones, called tonsilloliths, are found within little pockets (crypts) in the tonsils that typically form in chronic recurrent tonsillitis and harbor bacteria. The stones are foul-smelling. They tend to contain high quantities of sulfa. When crushed, they give off the characteristic rotten egg smell which is well […]
- Squamous intraepithelial lesion
A general term for the abnormal growth of squamous cells on the surface of the cervix. The changes in the cells are described as low grade or high grade, depending on how much of the cervix is affected and how abnormal the cells are. Also called SIL.
- Squamous cells
Flat cells that look like fish scales. The word “squamous” came from the Latin squama meaning “the scale of a fish or serpent.” We have a lot of squamous cells. They make up most of the cells in the outer layer of the skin (the epidermis), the passages of the respiratory and digestive tracts, and […]
The upper or outer layer of the two main layers of cells that make up the skin. The epidermis is mostly made up of flat, scale-like cells called squamous cells. Under the squamous cells are round cells called basal cells. The deepest part of the epidermis also contains melanocytes. These cells produce melanin, which gives […]
- Squamous cell carcinoma in situ
An early stage of skin cancer that develops from squamous cells (the flat, scale-like cells in the outer layer of the skin). The hallmark is a persistent, progressive, slightly raised, red, scaly, or crusted plaque that may occur anywhere on the skin surface or on mucosal surfaces, such as in the mouth. Under a microscope, […]