hereditary photodermatosis (Monarch Disease Ontology term MONDO_0015951) can be described as follows. Hereditary photodermatoses are a spectrum of rare photosensitive disorders that are often caused by genetic deficiency or malfunction of various components of the DNA repair pathway. This results clinically in extreme photosensitivity, with many syndromes exhibiting an increased risk of cutaneous malignancies. Also known as: genetic photosensitivity, genetic skin photosensitivity.