The myxoma is the least frequent among the connective-tissue tumors. It develops in the organs in which it was originally embryonic mucous tissue, but presents itself seldom unmixed. Lustig and Galeotti1 said:
Lues ta specie di mixoma che ricorda per la sua struttura il tessuto connettivo embriona le e il tessuto mucoso del cordono ombilicale é molto rara.
Usually it presents itself associated with the other connective-tissue tumors, as fibroma and lipoma. There are then mixed tumors—fibromyxomas and myxolipomas. The myxomas are essentially benign, but, if associated with sarcoma, they acquire the peculiar malignity of that tumor. Certain characteristics are essential to distinguish the myxoma from other connective-tissue tumors. Its edematous consistence, its mucoid appearance on cutting, its bluish-white or yellowish-white color are typical. It consists of granulous spindle-shaped or star-like cells with long, fine processes, which branch off irregularly and intermingle. The cells have generally each a single