Cervical dysplasia CIN 1. Colposcopy of the cervix (centre) with CIN 1 dysplasia. This is the first stage in the possible development of cervical cancer. There is a bloody discharge from the os (cervical canal) at centre. The dysplasia is seen below the os as a speckled, white discoloured area. Dysplasia occurs when cell division of cervical stratified squamous epithelium is disrupted by abnormal cell growth. There are 3 stages in cervical dysplasia, ranging from mild (CIN 1), to moderate (CIN 2) to severe (CIN 3). Treatment depends upon the severity of the disease, but may involve the removal of affected tissue by surgery.
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