. . . . "Acanthosis nigricans Hyperpigmented velvety thickening of neck, axillae and other body folds Associated with insulin resistance, obesity and malignancy of GI or GU tract Malignant variety affects hands & feet Dermatomyositis Heliotrope eyelids; erythema face, neck, upper trunk Flat papules on knuckles Associated in elderly with malignancy of breast, lung, GI tract, ovary & uterus Necrolytic migrat" .