Carcinoma of the cervix is the most common malignancy in women in India. Squamous cell carcinoma accounts for more than 70% of the cervical malignancies. Carcinoma of the cervix generally invades the uterine wall by direct extension with or without parametrial involvement, however, rarely can spread superficially to the inner surface of the uterus replacing the endometrium. It is an uncommon phenomenon for an in situ lesion of the cervix to have contiguous superficial spread to the endometrium. We report a case of cervical in situ squamous cell carcinoma in a 45-year-old female with contiguous extension to the endometrium of the lower uterine segment.