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Example of ultrasound measurement of cyst volume at baseline (A, 220 mL) and after 6 months (B, 20 mL). Cyst volume was calculated by multiplying the mean orthogonal diameters using the ellipsoid formula (D1 * D2 * D3 * 0.523). In D1, we measured the cysts medio-lateral direction, D2 dorso-ventral direction, and D3 in cranio-caudal direction
