Husband Has 30 Lb Unintentional Weight, Night Sweats, Low Hemoglobin,

Husband has 30 lb unintentional weight, night sweats, low hemoglobin, low hematocrit, low RBC, low platelets for year...constipation sonce ileus.....Dr is doing more blood work, CT of chest, colonoscopy, endoscopy, possible bone marrow biopsy....are these correct tests? He had CT of abdomen which showed spots on spleen, but no enlargement