Calcification in untreated mediastinal lymphoma.

Calcification was demonstrated radiographically within newly diagnosed lymphoma of the mediastinum in two patients. These patients and those in other isolated reports show that radiographic examinations may, rarely, reveal calcification in lymphomatous tissue prior to treatment.

Pathways of tumor spread through the lung: radiologic correlations with anatomy and pathology.

The pathways of tumor spread through the lung are described and their significance for radiographic interpretation is illustrated. A key to understanding the spread of bronchogenic carcinoma is the realization that although the normal flow of lymph in the pulmonary lymphatics is centripetal, lymphatic obstruction can cause reversal of flow. As a result, tumor cells are commonly carried centrifugally to the periphery in lymphatics or the connective tissue around them, and remote pleural involvement, secondary parenchymal masses, or satellite nodules may develop.

Radiographic anatomy of the interlobar fissures: a study of 100 specimens.

A review of the anatomy of the interlobar fissures is based on a detailed study of 100 fixed and inflated lung specimens (50 right and 50 left lungs). The upper part of the fissural surface of the right lower lobe almost always faces in a slightly lateral direction and is usually concave; the lower part typically faces laterally but is usually convex. The upper part of the left major fissure also almost always faces laterally and is concave; but unlike the right side, the lower part usually faces medially and is convex.

The epicardial fat pad sign: analysis of frontal and lateral chest radiographs in patients with pericardial effusion.

The epicardial fat pad sign (EFPS) has been useful in the diagnosis of pericardial effusion on plain frontal and lateral chest radiographs. In this series of 100 cases, including patients with small pericardial effusions, it was positive in 52% of cases, being seen on the lateral view in 41%, on the frontal view in 23%, and on both views in 12%. The authors consider this sign to be the most reliable plain-radiograph finding in the diagnosis of pericardial effusion.