Lung mass classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Maria Fernanda Villarreal, M.D. [2] Akshun Kalia M.B.B.S.[3]

Overview[edit | edit source]

Lung mass can be classified into malignant and benign. In addition, lung mass can be sub-classified according to location, imaging features, and distribution.

Lung mass can be classified by location, histopathological origin, and imaging features into the following types:

Lung mass

Location

Imaging Features

• Pleural
• Endobronchial
• Parenchymal

• Malignant mass
• Benign mass

• Hyperdense pulmonary mass
• Cavitating pulmonary mass

The table below summarizes the classification of lung mass according to the histopathological origin, and location.^[1]^[2]^[3]^[4]


Lung mass location	Benign	Malignant
Classification of Benign and Malignant Pulmonary Mass
Endobronchial	Bronchial atresia Bronchial hamartoma Bronchogenic cysts Pulmonary bacterial abscess Bronchial anthracofibrosis Allergic bronchopulmonary aspergillosis	Squamous dysplasia of lung Squamous cell lung carcinoma
Parenchymal	Granuloma Pulmonary hamartoma Pulmonary bacterial abscess Pulmonary infarct septic Pulmonary emboli	Bronchogenic carcinoma Carcinoid tumor Pulmonary metastases Papillary thyroid carcinoma Giant cell tumor of bones Synovial sarcoma
Pleural	Pleural effusion Empyema Hemothorax Lipoma Splenosis Tuberculosis	Mesothelioma Metastatic pleural disease Invasive thymoma Pleural fibrosarcoma Pleural liposarcoma Primary pleural lymphoma Pleural synovial sarcoma

The table below summarizes the classification of lung mass according to the imaging features.^[4]


Classification of Lung Mass Based on Imaging features
Hyperdense pulmonary mass	Cavitating pulmonary mass
Granuloma (the most common) Pulmonary hamartoma Bronchogenic carcinoma Carcinoid tumor Pulmonary metastases: Mucoid calcification of mucinous adenocarcinoma Breast cancer Gastrointestinal tract adenocarcinoma Dystrophic calcification: Papillary thyroid carcinoma Giant cell tumor of bone Synovial sarcoma Treated pulmonary metastases: Osteosarcoma Chondrosarcoma	Cancer Bronchogenic carcinoma (the most common) Squamous cell carcinoma Autoimmune Granulomas (Wegener's granulomatosis) Rheumatoid arthritis Rheumatoid nodules Vascular Septic pulmonary embolus Infections (bacterial/fungal) Pulmonary abscess Pulmonary tuberculosis Trauma Pneumatoceles Youth Congenital pulmonary airway malformation Pulmonary sequestration Bronchogenic cyst

↑ Macchiarini P (January 2006). "Primary tracheal tumours". Lancet Oncol. 7 (1): 83–91. doi:10.1016/S1470-2045(05)70541-6. PMID 16389188.
↑ Wilson RW, Frazier AA (February 1998). "Pathological-radiological correlations: pathological and radiological correlation of endobronchial neoplasms: part II, malignant tumors". Ann Diagn Pathol. 2 (1): 31–4. PMID 9845721.
↑ Park CM, Goo JM, Lee HJ, Kim MA, Lee CH, Kang MJ (2009). "Tumors in the tracheobronchial tree: CT and FDG PET features". Radiographics. 29 (1): 55–71. doi:10.1148/rg.291085126. PMID 19168836.
↑ ^4.0 ^4.1 Pulmonary mass. Dr.Jeremy Jones. Radiopedia. http://radiopaedia.org/articles/pulmonary-mass Accessed on March 22,2016