Although most of the keratinization disorders are congenital diseases, there are also acquired forms of keratinization disorders. Among their multiple causes systemic malignancies deserve special attention. Acquired ichthyosis, Bazex syndrome and tripe palms are among diseases with highest ratio of paraneoplastic association. On the other hand, acanthosis nigricans has very severe and atypical presentations when associated with malignancy. Acquired palmoplantar keratoderma without any detectable cause could rarely have paraneoplastic origin. The early and correct diagnosis of these diseases is important to disclose the malignancies early.