Lung to lung metastasis is seen in-
Ref:Textbook of pathology (Harsh mohan) 6th edition,page no.500 Adenocarcinoma, also called peripheral carcinoma due to its location and scar carcinoma due to its association with areas of chronic scarring, is the most common bronchogenic carcinoma in women and isslow-growing.Recent estimates on adenocarcinoma place this as the most frequent histologic subtype of lung cancer. Adenocarcinoma is fuher subclassified into 4 types: i) Acinar adenocarcinoma which has predominance of glandular structure and often occurs in the larger bronchi. ii) Papillary adenocarcinoma which has a pronounced papillary configuration and is frequently peripherally located in the lungs and is found in relation to pulmonary scars (scar carcinoma). iii) Bronchiolo-alveolar carcinoma is characterised by cuboidal to tall columnar and mucus-secreting epithelial cells growing along the existing alveoli and forming numerous papillary structures. Ultrastructurally, these tumour cells resemble Clara cells or less often type II pneumocytes. iv) Solid carcinoma is a poorly-differentiated adenocarcinoma lacking acini, tubules or papillae but having mucuscontaining vacuoles in many tumour cells. The tumour extends directly by invading through the wall of the bronchus and destroys and replaces the peribronchial lung tissue. As it grows fuher, it spreads to the opposite bronchus and lung, into the pleural cavity, the pericardium and the myocardium and along the great vessels of the hea causing their constriction.
Adenocarcinoma of lung
Squamous cell carcinoma
Small cell carcinoma
Neuroendocrine tumor of lung
Respiratory system