Gadre Anuja, Singhal Manphool, Rohit Manojkumar, Singh Harkant, Mitra Suvradeep, Sharma Arun, Mandal Meenakshi
Post Graduate Institute of Medical Education & Research, Chandigarh, India; Department of Cardiology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Department of Radiodiagnosis, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
JACC Case Rep. 2025 Jun 25;30(16):103902. doi: 10.1016/j.jaccas.2025.103902.
Posterior mediastinal masses are rare and remain asymptomatic until they enlarge enough to compress vital vascular structures, the tracheobronchial tree, the spine, or cardiac chambers. Computed tomography (CT) and cardiac magnetic resonance (CMR) provide precise locations and characterization of lesions.
A young woman was found to have a cystic mass in the posterior mediastinum extending into the interatrial septum and left atrium (LA) on echocardiography. Cardiac CT and CMR showed it protruding into the interatrial septum and LA. The diagnosis was confirmed as hydatid cyst on imaging and histopathologic examination.
Mediastinal hydatid cysts are usually asymptomatic but may rarely cause pressure effects on vital organs or rupture, leading to life-threatening complications mandating precise diagnosis and management.
TAKE-HOME MESSAGES: Primary posterior mediastinal hydatid cysts are uncommon and can protrude into cardiac chambers, simulating a cardiac mass on echocardiography. They can be accurately diagnosed using multimodality imaging to guide appropriate treatment.
后纵隔肿块较为罕见，在其增大到足以压迫重要血管结构、气管支气管树、脊柱或心腔之前通常无症状。计算机断层扫描（CT）和心脏磁共振成像（CMR）可提供病变的精确位置和特征。
一名年轻女性经超声心动图检查发现后纵隔有一个囊性肿块，延伸至房间隔和左心房（LA）。心脏CT和CMR显示该肿块突出至房间隔和左心房。经影像学和组织病理学检查确诊为包虫囊肿。
纵隔包虫囊肿通常无症状，但很少可能对重要器官产生压迫效应或破裂，导致危及生命的并发症，因此需要精确诊断和处理。
原发性后纵隔包虫囊肿并不常见，可突出至心腔，在超声心动图上类似心脏肿块。可通过多模态成像准确诊断，以指导适当治疗。
