Preinvasive lesions of the lung

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)