According to the epidemiological data, a tendency for rising cervical adenocarcinoma morbidity, especially among young women, has recently been observed. The efficacy of routinely used screening methods in detecting glandular precancerous lesions is significantly lower than in planoepithelial lesions. Many authors emphasize a worse outcome in cervical adenocarcinoma patients when compared with the patients with squamous cell cancer. Endometrial cancer is one of the most common gynecologic malignancies in Poland – affecting menopausal women. An early symptom of this cancer is an abnormal bleeding pattern in women of childbearing age or bleeding after menopause. The selection of the type and methods of endometrial cancer treatment are crucial factors influencing the final effectiveness of treatment. The article presents a case report – patient (age 31) who after cervical conization was diagnosed with cervical adenocarcinoma. Based on the diagnosis, the patient was qualified to Wertheim’s operation (radical hysterectomy with pelvic lymphadenectomy with paracervical tissue). There were no complications during or after surgery. The final histopathological report proved endometrial clearcell adenocarcinoma. We discussed diagnostic difficulties and the recommended treatment for both types of cancer. We should also remember that the final pathology report determines postoperative treatment.