Upturned Moustache sign or Antler sign is seen in: (A) Mitral regurgitation, (B) Aortic stenosis, (C) Aortic regurgitation, (D) Mitral stenosis
Answer is D. Mitral stenosis leads to increased left atrial and hence pulmonary venous pressures. The prominence of pulmonary veins on chest X-rays leads to Upturned Moustache sign or Antler sign.