The Noninvasive Diagnosis of Intrathoracic Splenosis Using Technetium-99m Heat-Damaged Red Blood Cells

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Intrathoracic splenosis results from the implantation of splenic tissue in the thoracic cavity following simultaneous rupture of the spleen and diaphragm. These implants may form mass lesions that lead to an extensive, costly, and invasive series of investigations, usually resulting in unnecessary surgery. The key to diagnosis is a high index of suspicion provoked by the history of a traumatic event, possibly in the distant past. This report emphasizes that because of its ability to demonstrate the functional nature of tissue, a definitive diagnosis can be made using heat-damaged Tc-99m RBCs without the need for surgical intervention.

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