<prompt> Which of the following is a feature of Marfan;s syndrome?Pulmonary hypeensionMental retardationEmphysemaSubluxuation of lens  <response>: Subluxuation of lens is associated with Marfan;s syndrome. Features of Marfan;s syndrome Mitral valve prolapse Myopia due to upward dislocation of lens bilateral ectopic lentis Aoic root dilatation, Aoic regurgitation Retinal detachment Fibrillin 1 gene defect: Reduced fibrillin 1 production causing joint laxity Fifteen chromosome 15 is invloved Flat feet Arachnodactyly, Astigmatism, Air in lungs Pneumothorax Near Sightedness Subluxuation of lens, Scoliosis, Speech disorders, Sleep apnea Ref: Nelson textbook of pediatrics 21st edition Pgno: 3741 