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Figure 8a. Enlarged lingual tonsils in a 13-year-old boy with Down syndrome and persistent obstructive sleep apnea despite previous tonsillectomy and adenoidectomy. (a) Sagittal and (b) transverse fast SE IR MR images (5000/34, echo train length of 12, 22-cm field of view, 6-mm section thickness with 2-mm gap, 256 x 192 matrix, two signals acquired) show enlarged lingual tonsil (arrows) filling and obstructing the hypopharynx.