<prompt> All of the following may occur in Downs syndrome, except:HypothyroidismUndescended testisVentricular septal defectBrushfields spots  <response>: Undescended testis has not been described as an association with Downs syndrome. Hypothyroidism, ventricular septal defect, Brushfields spots are seen in Downs syndrome. Ref: Essential Pediatrics By O P Ghai, 6th Edition, Page 592; Down Syndrome By Mark Selikowitz, 2008, Preview. 