CASE 59 History: Sacral dimples in four children of different ages are evaluated. 1. What should be included in the differential diagnosis? (Choose all that apply.) c. Low-lying conus with cord tethering d. Normal spine MRI for patient’s age 2. All of the following statements regarding the MRI appearance of the normal spine in infants are true except: a. Three stages are characterized on MRI. b. Stage I is from birth to 1 month. c. In stage I, the ossification center is markedly hyperintense on T1-weighted images. d. The disk is markedly hyperintense on T2-weighted images in all stages. 3. Which lumbar spine structures enhance prominently in children younger than 18 months of age? a. Anterior and posterior longitudinal ligaments b. Cartilaginous end-plate and ossification center 4. Which of the following statements regarding a “pseudodisk” appearance is true? a. The hyperintense ossification center appears as a “pseudodisk.”
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