Comparison between a scanning election micrograph (SEM top) and transmission electron micrograph (TEM bottom) of a lung cancer cell. Typical of many cancer cells the nucleus (blue TEM) is enlarged and multilobed, the cell walls are covered in projections (SEM) and the cytoplasm contains a large number of organelles (TEM). Adenocarcinoma ( shown here) is a non-small cell lung cancer that is more commonly found in women and non-smokers, and it is the most common type of lung cancer for people under 45. Adenocarcinoma accounts for approximately 50% of all non-small cell lung cancers and begins in the outer sections of the lung (although it can occur as central lesions) which can make it difficult to detect in the early stages of the disease. Magnification: x4000 @ 10 centimetres wide. For a series of comparisons between SEMs and TEMs see images C047/7006 to C047/7034.