Author: Glossary
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Dysprosium
A metallic element of the yttrium group of rare earths with atomic number 66 and an atomic mass of 162.50. It has a metallic, bright silver luster, and it is relatively stable in air at room temperature, but dissolves in dilute or concentrated mineral acids. Dysprosium is used in conjunction with vanadium and other elements,…
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Paroxysmal-nocturnal dyspnea
Sudden attacks of shortness of breath that usually occur when patients are asleep in bed. The affected patient awakens gasping for air and tries to sit up (often near a window) to relieve the symptom. PND is one of the classic symptoms of left ventricular failure, although it may also occasionally be caused by sleep…
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Inspiratory dyspnea
Difficult breathing due to interference with the passage of air to the lungs.
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Expiratory dyspnea
Difficult breathing associated with obstructive lung diseases such as asthma or chronic bronchitis. Wheezing is often present.
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Cardiac dyspnea
Difficult breathing that results from- inadequate cardiac output (i.e., from heart failure).
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Dysplasminogen
Any of several varieties of abnormal plasminogen. Their presence in the bloodstream causes excessive blood clotting.
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Polyostotic fibrous dysplasia
Fibrous dysplasia affecting multiple bones, including in some children, long bones as well as facial or cranial bones. McCune-Albright syndrome is a disease in which polyostotic fibrous dysplasia is found in association with precocious puberty and diseases of skin pigmentation.
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Osteofibrous dysplasia
An extremely rare, benign bone tumor occurring in children under 10 years old. The primary symptoms are painless swelling or bowing of bone. It usually develops in the tibia or fibula.
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Hereditary ectodermal dysplasia
A form of anhidrotic dysplasia marked by few or absent sweat glands and hair follicles, smooth shiny skin, abnormal or absent teeth, nail deformities, cataracts or corneal alterations, absence of mammary glands, a concave face, prominent eyebrows, conjunctivitis, deficient hair growth, and mental retardation.
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Anhidrotic dysplasia
A congenital condition marked by absent or deficient sweat glands, intolerance of heat, and abnormal development of teeth and nails.