Four different cases of squamous cell carcinoma. a shows the classical CT appearance with thick walled central hilar cavitary lesion. b shows a peripheral thick cavitary lesion with invasion of the pleura, chest wall, and the posterior mediastinum. c shows a superior sulcus tumor with invasion of the chest wall (not shown) and d shows a speculated lung parenchymal mass lesion separable from the hilum (not shown) invading the mediastinum
Gharraf, H.S., Mehana, S.M. & ElNagar, M.A. Role of CT in differentiation between subtypes of lung cancer; is it possible?. Egypt J Bronchol 14, 28 (2020). https://doi.org/10.1186/s43168-020-00027-w