Second Trimester Ultrasound Diagnosis of External Hydrocephalus in Two Fetuses with Noonan Syndrome—Case Report Series. - Elekes, Tibor; Ladanyi, Aniko; Pap, Eva; Szabo, Janos; Illes, Anett; Gullai, Nora; Varbiro, Szabolcs (Journal of Clinical Medicine, 2025)