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Angiodysplasia is the most common vascular lesion of the gastrointestinal tract, and this condition may be asymptomatic, or it may cause gastrointestinal (GI) bleeding.
Aplasia (from Greek a (not, no); plasis (molding)) is defined in general as defective development or congenital absence of an organ or tissue. In the field of hematology, the term refers to incomplete, retarded, or defective development, or cessation of the usual regenerative process. Examples. Acquired pure red cell aplasia