Primary intrathoracic goiter is a very rare entity representing only 1% of all intrathoracic goiters. It arises from mediastinal ectopic thyroid, without tissue connection with cervical thyroid and its blood supply is entirely derived from intrathoracic vessels. Secondary intrathoracic goiter is a much more common condition.
Omentum infarction occurs when the omentum is torsioned around its long axial axis and compresses the vascular structure. Although omentum infarction is rare, it is an important pathology that should be considered in acute abdomen. The insidence is 2 times higher in men than in women.