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.
  Brain<unk>  may be helpful in the detection of brain metastasis in patients with chronic myelogenous leukemia.
option_0: Chronic myelogenous leukemia MRI
option_1: Chronic lymphocytic leukemia MRI
option_2: T-cell prolymphocytic leukemia MRI
option_3: Hairy cell leukemia MRI
option_4: Acute myeloid leukemia CT
option_5: Acute lymphoblastic leukemia CT
option_6: Chronic myelogenous leukemia CT
option_7: Chronic myelogenous leukemia ultrasound