text: Pernicious anemia (also called Addison's anemia) is a type of red blood cell disorder caused by impaired vitamin B12 metabolism. Vitamin B12 is primarily absorbed by the small intestine, after being bound to intrinsic factor secreted by parietal cells of gastric mucosa. When this process is disrupted by conditions like atrophic gastritis, celiac disease, small bowel resection etc, B12 deficiency ensues.
  Surgery is not the first-line treatment option for patients with chronic<unk>  leukemia. Splenectomy is usually reserved for patients with enlarged spleen and it has no role in curing CML.
option_0: Chronic myelogenous leukemia surgery
option_1: Chronic lymphocytic leukemia surgery
option_2: Acute promyelocytic leukemia surgery
option_3: Adult T-cell leukemia surgery
option_4: Myeloproliferative neoplasm surgery
option_5: Chronic neutrophilic leukemia surgery
option_6: Myelodysplastic syndrome surgery
option_7: Myelofibrosis surgery