Currently malignant mixed tumours do not have a definitive predisposing factor; however, prior physical injury has been proposed as a potential risk for the emergence of these tumours.<unk><unk>  less than three centimetres are shown to have a heightened risk of malignancy. Other critical indicators include excessive mucoid matrix, – a connective tissue tumour with a myxoid background that is composed of "clear, mucoid substance – numerous mitoses, and poorly differentiated<unk>  components." (Metzler, Schaumburg-Lever, Hornstein, and Rassner, 1996)
Malignant chondroid syringoma
Neural fibrolipoma
Aggressive angiomyxoma
Malignant acrospiroma
Chondroid syringoma
Peripheral ossifying fibroma
Malignant ectomesenchymoma
Ganglion cyst