A colposcopy does not usually show cancer directly. Colposcopy is a type of endoscopy that can detect lesions and take a biopsy of the lesion, which is sent to the laboratory to determine if the lesion is cancerous. Sometimes it is difficult to distinguish inflammatory tissue from cancer under colposcopy, so it is not possible to make a direct diagnosis. Due to the limitation of sampling, some patients are considered to have malignant tumors under colposcopy, but due to the small amount of material taken, the pathological diagnosis may not be clear, and these patients need to be repeatedly sampled several times before the diagnosis can be clear. Therefore, colposcopy is an endoscopic examination, mainly to find lesions and take pathological biopsy, and the definitive diagnosis mainly depends on pathological examination.