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.
A person of any age can develop atypical lymphocytosis, but there are some people who are more susceptible than others. Children under the age of two do not have a developed immune system. Adults with connective tissue diseases or otherwise weakened immune systems may have an increase of atypical lymphocytes. Patients with acute or chronic leukemia may also have an occurrence of atypical lymphocyte increases. To determine the presence of atypical lymphocytosis, doctors perform standard blood tests.