Cat cry syndrome: A disorder caused by the loss of part of the short (p) arm from chromosome 5. Also called the cri du chat (or cri-du-chat) syndrome.
The cat cry syndrome is one of the most common human deletion syndromes with an incidence varying between 1 in 20,000 to 1 in 50,000 births. The frequency of the syndrome among profoundly retarded patients (with an IQ less than 20) is approximately 1 in 100.
The syndrome was discovered in France in 1963 by a team headed by the late Jerome Lejeune. The peculiar cry of affected infants sounded to Lejeune like the meowing of a Parisian cat. The syndrome involves severe developmental and mental retardation and a characteristic constellation of congenital malformations which include microcephaly (small head), round face, hypertelorism (wide-spread eyes), micrognathia (small chin), epicanthal folds (inner eye folds), low-set ears, hypotonia (poor muscle tone), and motor and mental retardation. Although the majority of patients die in early childhood, some survive into adulthood and exhibit an IQ below 20, a loss of hypertelorism and epicanthic folds and development of a thin narrow face with prominent nasal bridge.
- Cat eye syndrome
Cat eye syndrome: A constitutional chromosome abnormality (one that is present at or before birth) with multiple malformations characterized by the combination of a cat-like slit of the iris of the eye (vertical coloboma) and no anal opening (anal atresia). Frequently there are also down slanting eye slits (palpebral fissures), tissue tags or pits just […]
- CAT scan
Computerized axial tomography scan. CAT scanning is a painless X-ray test in which a computer generates cross-section views of a patient’s anatomy. It can identify normal and abnormal structures, and it can be used to guide procedures. Iodine-containing contrast material is sometimes used in CAT scanning. A patient who is allergic to iodine or contrast […]
- CAT scan, helical
CAT scan, helical: A conventional computerized axial tomography scan (CAT scan or CT scan) is an x-ray procedure which combines many x-ray images with the aid of a computer to generate cross-sectional views and, if needed, three-dimensional images of the internal organs and structures of the body. A CAT scan is used to define normal […]
- CAT scan, spiral
CAT scan, spiral: A conventional computerized axial tomography scan (CAT scan or CT scan) is an x-ray procedure which combines many x-ray images with the aid of a computer to generate cross-sectional views and, if needed, three-dimensional images of the internal organs and structures of the body. A CAT scan is used to define normal […]
- Cat scratch disease
A bacterial infection due to a cat scratch seen most often today in people with HIV. The disease characteristically presents with swollen lymph nodes (lymphadenitis), sore throat, fatigue, and fever, chills, sweats, vomiting, loss of appetite, and weight loss. There is usually a little bump (a papule) which may be pus-filled (a pustule) at the […]