<prompt> Which naevi commonly predispose to malignant melanoma ?DermalJunctionalCongenitalLentigo  <response>: Malignant transformation is rare and occurs in the following situations: Congenital melanocytic naevi:6 of lesions undergo malignant change , risk of malignant transformation is greater in giant lesions. Dysplastic naevus syndrome: in melanoma prone families. From illustrated synopsis of dermatology and sexually transmitted diseases neena khanna 5th edition page no 382 