Hajdu-Cheney syndrome (HCS) is a rare, heritable disorder of connective tissue; only about 50 cases have been reported in the medical literature. The breakdown of bone (osteolysis), especially the outermost bones of the fingers and toes (acroosteo...

Dry mouth, also known as xerostomia, is a condition in which the salivary glands do not produce enough saliva to keep the mouth moist. This can lead to a variety of symptoms, including a dry, sticky feeling in the mouth, difficulty swallowing or s...

Xeroderma pigmentosum (XP) is a group of rare inherited skin disorders characterized by a heightened reaction to sunlight (photosensitivity) with skin blistering occurring after exposure to the sun. In some cases, pain and blistering may occur imm...