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(A) Brain magnetic resonance imaging (MRI) of case A with hypogonodotrophic hypogonadism. No anatomical abnormalities are detected in brain MRI. (B) Brain MRI of case B with growth hormone deficiency. MRI of the hypothalamic pituitary region is normal. (C) Brain MRI of case G with growth hormone deficiency. Brain MRI doesn't detect any abnormality.
