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July 8, 1974

Mobile Mass in a Pulmonary Cavity or Air Meniscus Sign

Author Affiliations

From the Department of Radiology, Walter Reed Army Medical Center, Washington, DC 20012.

JAMA. 1974;229(2):199-200. doi:10.1001/jama.1974.03230400061041

In introducing the "Gamut"1,2 as a regular feature of Topics in Radiology, it is hoped that each case will prove challenging to the radiologist and clinician alike, since only by working together can the correct diagnosis be established in difficult cases. The gamut approach to roentgenographic diagnosis rests on the following triangulation concept.

  1. Successful roentgenographic interpretation begins with a detailed analysis of all the indexes of disturbed morphology and pathophysiology seen on the roentgenogram.

  2. The radiologist can usually fit the visualized abnormalities into a specific pattern of disturbed morphology, such as "honeycomb" lung, "bull's-eye" lesion of the gastrointestinal tract, or solitary epiphyseal lesion of bone. For each pattern there is a specific gamut or comprehensive list of differential possibilities.

  3. This list can be narrowed to one or several reasonable possibilities for a given patient, based on age, symptoms, and knowledge of pertinent clinical and laboratory data