Gammy and britlady,
According to mayoclinic.com: "Lung nodules — small masses of tissue in the lung — are quite common. They appear as round, white shadows on a chest X-ray or computerized tomography (CT) scan. They're usually about .2 inch (5 millimeters) to 1 inch (25 mm) in size. A larger lung nodule, such as one that's 25 mm or larger, is more likely to be cancerous than is a smaller lung nodule".
As britlady stated "There is always hope".