A 4-year-old, otherwise healthy boy presented with a 2-week history of a swelling over the nasal dorsum. His mother denied associated upper respiratory infection, drainage, tenderness, fever, neck stiffness, vomiting, or altered sensorium. His family history was non-contributory. An ear, nose, and throat examination revealed a small, nontender swelling over the middle part of the dorsal nasal pyramid. There was an associated sinus with a single hair protruding through it. Findings from the rest of the examination were normal.A sagittal T2-weighted magnetic resonance image (MRI) showed a bilobed cystic lesion at the nasal suture with increased signal intensity (Figure, A, arrow). A sagittal Ti-weighted MRI showed the lesion to be isointenseto muscle (Figure, B, arrowhead). An axial T2-weighted MRI showed a small bilobed lesion with increased intensity with a small communication between the superficial and deep components at the nasal suture (Figure, C, arrows).
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