In brief: Abnormal wrist bone. The lunate is one of eight bones in the wrist. It is shaped like a half-moon and therefore called the lunate. Breakdown of this bone is known as kienbock's disease. The exact cause of this condition is not known. It may be related to various anatomical features unique to you. It may be genetically related.
Quick Answer. Atypical cells, the presence of which is sometimes called dysplasia, have a number of causes that range from infection and/or inflammation to normal aging. Atypical cells usually revert back into normal cells once the cause is identified and treated.
In certain cases, atypical cells are found to be precancerous, though many are benign and do not spread to other parts of the body. During microscopic evaluation, cells may appear abnormal even when they are benign. Atypical cells are different from normal cells in that many appear to be flat, with borders that are well-defined. Although treatment is commonly required for these atypical cells to revert back to normal, the process may sometimes take place spontaneously, despite the absence of treatment.