Meninges, Plural of Meninx

Any membrane; specifically, one of the membranous coverings of the brain and spinal cord. The brain and spinal cord are covered by 3 connective tissue layers collectively called the meninges that consist of the pia mater, the arachnoid and the dura mater. The meninges...

Metastases

The spread of a disease process from one part of the body to another. The appearance of abnormal tissue growths (malignant or nonmalignant) in parts of the body remote from the site of the primary tumor.

Microscopy

Using an operating microscope to better visualize a small operating field or perform delicate surgery. The examination of minute objects by means of a microscope, an instrument which provides an enlarged image of an object not visible with the naked eye.

Musculoskeletal

Relating to muscles and to the skeleton, as, for example, the musculoskeletal system. The musculoskeletal system is comprised of the skeleton, which provides mechanical support and determines shape; the muscles, which power movement; and connective tissues such as...

Needle Biopsy

Removal of tissue or suspensions of cells from living patients through a small needle for diagnostic examination. The removal of tissue or fluid with a needle for examination under a microscope. When a wide needle is used, the procedure is called a core biopsy. When a...