Preinvasive lung lesion

Preinvasive lesions of the lung are those pulmonary lesions that have not yet progressed to malignancy but have the potential to do so. This category includes:

• squamous dysplasia (SD) of lungs: squamous cell carcinoma in situ (CIS) of lung
• preinvasive adenocarcinoma of the lung 
  • atypical adenomatous hyperplasia (AAH)
  • adenocarcinoma in situ of the lung (AIS)
• diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH)