Malformation
A structural defect in the body due to abnormal embryonic or fetal development. There are many types of malformations. For example, cleft lip and cleft palate. See also Congenital malformation.
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- Malformation, arteriovenous
Surgery, which is the best-known and longest-standing treatment for AVM. Surgery for an AVM involves identifying the margins of the malformation, ligating (tying off) or clipping the feeder arterial vessels, obliterating the draining veins, and removing or obliterating the nidus (the nest) of the AVM. Endovascular occlusion, which involves closing off the vessels of the […]
- Malformation, arteriovenous (AVM)
Surgery, which is the best-known and longest-standing treatment for AVM. Surgery for an AVM involves identifying the margins of the malformation, ligating (tying off) or clipping the feeder arterial vessels, obliterating the draining veins, and removing or obliterating the nidus (the nest) of the AVM. Endovascular occlusion, which involves closing off the vessels of the […]
- Malformation, congenital
A physical defect present in a baby at birth, irrespective of whether the defect is caused by a genetic factor or by prenatal events that are not genetic. In a malformation, the development of a structure is arrested, delayed, or misdirected early in embryonic life and the effect is permanent. Congenital malformations can involve many […]
- Malignancy
A tumor that is malignant (cancerous), that can invade and destroy nearby tissue, and that may spread (metastasize) to other parts of the body.
- Malignant
1. Tending to be severe and become progressively worse, as in malignant hypertension. 2. In regard to a tumor, having the properties of a malignancy that can invade and destroy nearby tissue and that may spread (metastasize) to other parts of the body. The word malignant comes the Latin combination of “mal” meaning “bad” and […]