Lung to lung metastasis is seen in - (AlIMS May 2009)
|A||Adenocarcinoma of lung|
|B||Squamous cell carcinoma|
|C||Small cell carcinoma|
|D||Neuroendocrine tumor of lung|
a. Bronchoalveolar carcinoma (RAC) is a relatively unusual (5% of all lung cancer) Subtype of adenocarcinoma that has a unique growth pattern that differs from adenocarcinoma. RAC tumor cells from one site can aerogenously seed other parts of the same lobe or lung, or the contralateral lung. This growth pattern and tendency to seed can produce three radiographic presentation: a single nodule, multiple nodules (in single or multiple nodes), or a diffuse form with an appearance mimicking that of a lobar pneumonia. Because tumorcells fill the alveolar spaces and envelop small airways rather than destroying them, air bronchograms can be seen, unlike with other carcinomas.
b. It has the best prognosis of all the cell types.