what is a myxoid lesion?
A myxoid tumor is a connective tissue tumor with a myxoid background, composed of clear, mucoid substance.This tumoral phenotype is shared by many tumoral entities:1  Myxomas. 2  Atrial myxoma. myxoid tumor is a connective tissue tumor with a myxoid background, composed of clear, mucoid substance. This tumoral phenotype is shared by many tumoral entities: 1  Myxomas. 2  Atrial myxoma.