Ichthyosis By James G H Dinulos, MD, Geisel School of Medicine at Dartmouth Reviewed / Revised May 2023 View Patient Education Diagnosis Treatment Key Points Topic Resources Severe Lamellar Ichthyosis... Ichthyosis Vulgaris on the... Clinical and Genetic Features... Ichthyosis is scaling and flaking of skin ranging from mild but annoying dryness to severe disfiguring disease.