Chapter 22: The Female Genital Tract Pathology

The Female Genital Tract Pathology educational resource investigates the multifaceted pathology of the female reproductive system, starting with an analysis of embryonic development involving müllerian and wolffian duct structures. It provides a detailed examination of lower genital tract infections, including viral pathogens like herpes simplex (HSV) and molluscum contagiosum, as well as bacterial and parasitic causes of vaginitis and cervicitis. The text explores pelvic inflammatory disease (PID) as a critical ascending infection frequently linked to Neisseria gonorrhoeae and Chlamydia, which can lead to severe complications such as chronic salpingitis, tubal scarring, and ectopic pregnancy. Moving to the vulva and vagina, the summary differentiates between nonneoplastic disorders like lichen sclerosus and various squamous neoplasms, dividing vulvar carcinomas into those driven by high-risk human papillomavirus (HPV) and HPV-independent pathways often involving TP53 mutations. A major focus is placed on the cervix, specifically the oncogenic mechanisms of HPV in the transformation zone and the clinical importance of Pap smear screening and vaccination for preventing squamous intraepithelial lesions (LSIL and HSIL). The exploration of the uterine corpus covers dysfunctional uterine bleeding, the theories behind the pathogenesis of endometriosis and adenomyosis, and the molecular classification of endometrial carcinomas into endometrioid and serous subtypes based on genetic markers like PTEN and TP53. Myometrial tumors are discussed, contrasting the common benign leiomyoma (fibroids) with the aggressive leiomyosarcoma. Ovarian pathology is systematically categorized into epithelial tumors (serous, mucinous, clear cell, and Brenner), germ cell neoplasms such as teratomas and yolk sac tumors, and sex cord-stromal tumors like estrogen-secreting granulosa cell tumors. The chapter concludes with gestational and placental disorders, detailing the systemic endothelial dysfunction and angiogenic imbalances involved in preeclampsia and eclampsia, as well as the clinical spectrum of gestational trophoblastic disease ranging from hydatidiform moles to choriocarcinoma.