MSH: Inflammation in which both the anterior and posterior segments of the uvea are involved and a specific focus is not apparent. It is often severe and extensive and a serious threat to vision. Causes include systemic diseases such as tuberculosis, sarcoidosis, and syphilis, as well as malignancies. The intermediate segment of the eye is not involved.,NCI: A disorder characterized by inflammation of the entire uvea which includes the iris, ciliary body, and choroid. Causes include systemic infections, sarcoidosis, and cancers.