Which of the following is NOT a type of lung cancer?

Astrocytoma is a type of brain tumor that arises from astrocytes, which are a star-shaped type of glial cell in the central nervous system. This particular cancer is associated with the brain and spinal cord, rather than the lungs. In contrast, adenocarcinoma, small cell carcinoma, and squamous cell carcinoma are all classifications of lung cancer. Adenocarcinoma is the most common type of lung cancer and originates in the glandular tissues of the lungs. Small cell carcinoma, known for its rapid growth and aggressive nature, typically arises in the central airways of the lungs. Squamous cell carcinoma originates in the flat cells lining the lungs and is also linked to smoking. Therefore, astrocytoma is accurately identified as a type of cancer that does not belong to the lung cancer category.