Category: E

A congenital absence of a part at birth. Congenital absence of any body part or organ.  

A congenital absence of all or part of a finger. Congenital absence of some fingers or toes.  

An unusual focus of the heart muscle which takes the place of the sinoatrial node. Any endogenous cardiac pacemaker other than the sinoatrial node.  

An unusual extra beat of the heart which originates from a point other than the sinoatrial node. An abnormal heart rhythm, in which the heart contracts sooner than usual. It is the most common form of abnormal heart rhythm and the least serious. An ectopic heartbeat is also known as extrasystole. Ectopic heartbeats can give…

In which an organ or part of the body is not in its usual position. Abnormal positioning of a part or organ, especially at the time of birth, ectopic. The misplacement, due either to a congenital defect or injury, of a bodily part. Malposition or displacement, especially congenital, of an organ or structure.  

Parasite which lives on the skin. A parasite that lives on the exterior of its animal or human host. Ectoparasites may be organisms ranging in size from microscopic to those visible to the naked human eye. They can cause serious illness, such as Lyme disease (deer ticks and western blacklegged ticks) and Rocky Mountain spotted…

Referring to the ectoderm.  

The dilatation of a passage. The dilatation of a tube, duct, or hollow organ. A term that means widening, usually referring to a disorder of a duct bearing secretions from a gland or organ (e.g. mammary duct ectasia). The term “ectasia” is used to describe a condition of widening, particularly concerning a disorder of a…

A surgical instrument, usually with a wire loop, used to cut a part or a growth off at its base. A surgical device, resembling a snare, that is used to sever the base of a tumor during its surgical removal.