<prompt> Howah operation is done forAchalasia cardiaFrontal sinusitisPyloric stenosisEDH  <response>: HOWAH OPERATION is done mainly for the treatment of frontal sinusitis. .treatment for ACHALASIA CARDIA includes modified heller;s operation POEMperoral endoscopic myotomy forcible dilatation ref: SRB;s manual of surgery,5th ed, pg no 798 