Coexistence of Placental Site Nodule and Cervical Squamous Carcinoma in a 72-Year-Old Woman

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We report a unique case of the coexistence of cervical cancer and placental site nodule (PSN) in a 72-year-old multiparous woman presenting with vaginal bleeding. She had undergone tubal sterilization 30 years before. On admission, she had profuse vaginal bleeding, and a bulky cervical mass was seen on vaginal examination. Histology revealed the coexistence of a moderately differentiated invasive squamous cell carcinoma with a PSN in its stroma. Its immunohistochemistry revealed characteristic phenotypes for both lesions—the squamous carcinoma was strongly positive for p16. The intermediate trophoblasts of the PSN showed a diffuse positivity for CAM 5.2, human placental lactogen, CD10, and α-inhibin and, focally, for human chorionic gonadotropin. This is the first report on the coexistence of these 2 lesions in an elderly postmenopausal patient and demonstrates that PSN can be found after the menopause as an unexpected lesion in this age group, mimicking various cervical malignancies.

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