Thoracic splenosis.

The authors present a case that demonstrates the continued high sensitivity of Tc-99m SC liver-spleen imaging for thoracic splenosis. A patient with profound weight loss, positive PPD and left upper lobe lung density on a chest radiograph was felt to have a strong clinical suspicion of a malignant pulmonary lesion. Two needle biopsies of the lesion were consistent with splenic tissue. Transbronchial biopsy of the right lower lobe lung revealed metastatic adenocarcinoma of an unknown origin. A Tc-99m SC liver-spleen scan of the abdomen and thorax indicated the lung density was consistent with thoracic splenosis.