Isotretinoin, INN, is a medication used for the treatment of a number of cancers and severe skin conditions. It was first developed to be used as a chemotherapy medication for the treatment of brain cancer, pancreatic cancer, and more. It is still used in the treatment of these cancers because of its ability to kill rapidly dividing cells. Its effects are systemic and nonselective. In some cases, it is used to treat harlequin-type ichthyosis, usually a lethal skin deformation in which sufferers develop armor plated-like skin and usually die soon after birth...