Pleural Diffuse Malignant Mesothelioma cT3 TNM Finding v9

**Semantic type:** Finding

**Definition:** Pleural diffuse malignant mesothelioma with tumor involving the ipsilateral pleura with Psum more than 30 mm, with or without: involvement of the fissure (Fmax more than 5 mm); mediastinal fat invasion; solitary area of chest wall soft tissue invasion. Note: Psum: pmax1+pmax2+pmax3 (sum of 3 measurements of maximal pleural thickness measured on axial images along the chest wall or mediastinum in each of the three divisions of the chest - upper, middle and lower divided by two lines; one at the top of the aortic arch and the second drawn at the top of the left atrium). Fmax: maximal thickness of pleural tumor along the fissures measured on sagittal images. (from AJCC 9th ed.)