Description: Bob DeJong, RDMS, RVT, FDMS, begins this module with a review of the spleen anatomy, splenic function and normal variants, scanning technique, laboratory values, parenchymal disease, blood disorders and spleen size, masses, metastatic disease, and trauma. The retroperitoneum is discussed with a review of anatomy and anatomical landmarks, the lymphatic system, and abdominal adenopathy. Additional topics include a section on the adrenal gland which includes anatomy, adrenal hemorrhage, and adult and pediatric masses. The module concludes with a discussion of the GI tract, appendicitis, pyloric stenosis, intussusception and ascities. Module length: Core concepts 42 minutes plus 35 minutes customized review. This module is included in the complete Abdomen Registry Review or may be purchased individually.