A 70-year-old women presented to the Emergency Room with complaints of left sided chest pain with exacerbation during inspiration, dyspnoea and palpitations. She reported dry cough for three weeks, without fever.
Physical examination: dullness to percussion, with absent breath sounds over the left hemithorax.
Past History: Three years ago, the patient had undergone mechanical mitral valve replacement and she was under anticoagulant treatment.
What could be the diagnosis ?
