Hello and welcome to HCM, The soft tissue mass in the apico-posterior segment of upper lobe of lung abutting the pleura is essentially arising from the surrounding structures. The mass can be arising from the lung parenchyma, connective tissue, etc in the vicinity of the lung lobe. You need to get some more investigations. A CT scan (if not done previously), aspiration cytology of the lung mass, or bronchoscopic biopsy of the mass need to be done to know the origin and character of the lesion. Management of the lesion can be done only when the diagnosis is made. If the lesion turns out to be benign, simple excision will be sufficient and if it turns out to be malignant, extensive surgery with or without surgery may be required. Consult your pulmonologist for further work up. Thanks and take care Dr Shailja P Wahal