Hydatid Cyst of the Right Atrium With Hepatic and Pulmonary Involvement and Concomitant Pulmonary Embolism, Presenting With Massive Haemoptysis: A Case Report. - Poursadegh, Farid; Amini, Mahnaz; Ghasemi, Javad; Poorzand, Hoorak; Hoseinikhah, Hamid; Farzadnia, Mehdi; Mozdourian, Mahnaz; Rezaeetalab, Fariba; Faridzadeh, Arezoo (Respirology Case Reports, 2026)