xeroderma pigmentosum

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xeroderma pig·men·to·sum

 (pĭg′mən-tō′səm)
n.
A rare hereditary skin disorder caused by a defect in the enzymes that repair DNA damaged by ultraviolet light.

[New Latin xēroderma pigmentōsum : xēroderma, xeroderma + pigmentōsum, neuter of pigmentōsus, of pigment.]
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Noun1.xeroderma pigmentosum - a rare genetic condition characterized by an eruption of exposed skin occurring in childhood and photosensitivity with severe sunburn; inherited as a recessive autosomal trait in which DNA repair processes are defective so they are more likely to chromosome breaks and cancers when exposed to ultraviolet light
xeroderma, xerodermia - a mild form of ichthyosis characterized by abnormal dryness and roughness of the skin
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Kathryn has blogged about her battle for health, which has seen her undergo two bone marrow transplants, a liver transplant and even live in a darkened room for a month when her body became allergic to light.
When she was just eight months old, specialists discovered she was allergic to light.
Yesterday, we told how Saicha and Dale live with an excrutiating skin condition which leaves them allergic to light.