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Case reports

Thymic cyst presenting as tachy-brady syndrome

Department of Thoracic Surgery, St James's Hospital, Beckett Street, Leeds, LS9 7TF, United Kingdom

Received 10 November 2008; received in revised form 12 February 2009; accepted 16 February 2009.

^_* Corresponding author. Tel.: +44 113 3925 737; fax: +44 113 3926 657. (Email: c_efthymiou{at}hotmail.com).

Tachy-brady syndrome or sick-sinus syndrome as it is also known is a cardiac rhythm disturbance resulting in alternating episodes of bradycardia and tachycardia. Diagnosis can be difficult because of its nonspecific symptoms and elusive findings on electrocardiogram or 24 h tape. Thymic cysts are relatively uncommon tumours that are predominantly asymptomatic and located in the anterior mediastinum. We present the first known report of tachy-brady syndrome associated with a large thymic cyst. Treatment consisted of dual-chamber pacemaker implantation prior to video-assisted removal of the thymic cyst.

Key Words: Thymic cyst • Mediastinal mass • Arrhythmia • Pacemaker insertion