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Liver hypodensity on a CT scan is caused by a variety of factors, according to Radiopaedia, such as benign and malignant neoplasms, focal nodular hyperplasia, focal fatty infiltration, benign epithelial cysts, cysts caused by liver disease and infection, pyogenic abscesses, fungal abscesses, amoebic abscesses, vascular infarctions, lacerations, old ...
Other factors which can cause false-positive CT lung scans which appear to be lung cancer include: 1) infections with TB and other bacteria, 2) exposure to toxic and/or allergenic substances such as asbestos, 3) pulmonary fibrosis, and 4) autoimmune diseases like sarcoidosis.istoplasmosis spores are especially common in the droppings of birds and bats. In the USA, Histoplasmosis infections are especially common in the USA in the Ohio and Mississippi River valleys. Histoplasmosis can also produce lung nodules which resemble primary or metastatic lung cancer.