Dander: Tiny scales shed from human or animal skin or hair. Dander floats in the air, settles on surfaces, and makes up a good portion of household dust. Cat dander is a common cause of allergic reactions.
Dandruff: A scalp condition that produces white flakes that may be shed and fall from the hair. One cause of dandruff is overworking of the sebaceous glands. Another cause of dandruff is fungus, especially an abundance of the fungus Pitrosporum ovale. If several weeks of using a good-quality shampoo does not stop the dandruff, treatment […]
- Dandy fever
Dandy fever: An acute mosquito- borne viral illness of sudden onset that usually follows a benign course with headache, fever, prostration, severe joint and muscle pain, swollen glands (lymphadenopathy) and rash. The presence (the “dengue triad”) of fever, rash, and headache (and other pains) is particularly characteristic. Better known as dengue, the disease is endemic […]
- Danlos syndrome
Danlos syndrome: Better known as Ehlers-Danlos syndrome (EDS), is an inherited disorder with easy bruising, joint hypermobility (loose joints), skin laxity, and weakness of tissues. There are a number of different Ehlers-Danlos syndromes which share these features but can be categorized into nine different types. Type I EDS (the “gravis” form od EDS) is characterized […]
- Danon disease
Danon disease: A genetic disorder characterized by heart problems, mental retardation and muscle weakness. Changes in the retina of the eye, leading to visual disturbances, may be present. Males are more severely affected and show symptoms in childhood or early adolescence, while affected females usually develop the symptoms later, in adolescence or adulthood. The disease […]
- Darier disease
Darier disease: A genetic skin disease characterized by an abnormality of the horny layer of the skin around the hair follicles. This disorder is inherited in an autosomal dominant manner and is due to mutation in a gene called ATP2A2 on chromosome 12. Also known as keratosis follicularis.