Invasive Carcinoma of Cervix.

squamous cell carcinomas (75%), followed by adenocarcinomas and adenosquamous carcinomas (20%), and small-cell neuroendocrine carcinomas (less than 5%)develop in the region of the transformation zone and range from microscopic foci of early stromal invasion to grossly conspicuous tumors encircling the os.

barrel cervix which can be identified by direct palpation.

Extension into the parametrial soft tissues can fix the uterus to the pelvic structures.

Spread to pelvic lymph nodes is determined by tumor depth .