I am unaware of there being a current distinct Fellowship in Thoracic Surgery vs Cardiac only. Most programs (despite it being listed in FREIDA as Thoracic Surgery) offer a combined Cardiothoracic Surgery fellowship leading to Board Certification.
A CT residency would include the following:
Surgery of the chest wall, lungs and pleura,
trachea and bronchi,mediastinum, diaphragm, esophagus,congenital heart disease,acquired heart disease,cardiac arrhythmias,valvular heart disease, trauma to all of the preceding, cardiac transplantation,lung transplantation, heart-lung transplantation, ECMO, bronchoscopy, esophogoscopy and pacemakers.
Hope this helps.
BTW, moving to The Lounge.