<unk>  refers to the pathologic analysis of samples of<unk><unk>  obtained by<unk><unk>  biopsy (often called a trephine biopsy) and<unk><unk>  aspiration. <unk>  is used in the diagnosis of a number of conditions, including leukemia, multiple myeloma, anemia, and pancytopenia.  The<unk><unk>  produces the cellular elements of the blood, including platelets, red blood cells and white blood cells. While much information can be gleaned by testing the blood itself (drawn from a vein by phlebotomy), it is sometimes necessary to examine the source of the blood cells in the<unk><unk>  to obtain more information on hematopoiesis; this is the role of<unk><unk>  aspiration and biopsy.
Bone marrow examination
Myelofibrosis physical examination
Myelofibrosis laboratory tests
Myeloproliferative neoplasm physical examination
Thrombocytopenia physical examination
Folate deficiency physical examination
Paroxysmal nocturnal hemoglobinuria physical examination
Hairy cell leukemia laboratory tests