1. Mesothelioma (malignant) : Signs and tests  (Trust Mark: Doctor-Reviewed)
Chest x-ray; Cytology of pleural fluid; Open lung biopsy; Pleural biopsy; Thoracic CT. Mesotheliomas are often hard to diagnose under the microscope. It can be hard to distinguish between this type of tumor and other conditions and tumors of the p...• Reviewer: Sean O. Stitham, MD, private practice in Internal Medicine, Seattle, Washington; and James R. Mason, MD, Oncologist, Director, Blood and Marrow Transplantation Program and Stem Cell Processing Lab, Scripps Clinic, Torrey Pines, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

2. Mesothelioma (benign-fibrous) : Signs and tests  (Trust Mark: Doctor-Reviewed)
During a physical examination, the health care provider may notice a clubbed appearance of the fingers. The tumor is usually found by accident when a chest x-ray is done for other reasons. Other tests that may show benign mesothelioma include: CT ...• Reviewer: Sean O. Stitham, MD, private practice in Internal Medicine, Seattle, Washington; and Benjamin Medoff, MD, Assistant Professor of Medicine, Harvard Medical School, Pulmonary and Critical Care Unit, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.