The hidden remnant: A case of incidentally detected Gartner duct cyst

INTRODUCTION

The paramesonephric (Müllerian) ducts are responsible for forming the female reproductive tract, whereas the mesonephric (Wolffian) ducts generally regress in females. Remnants of the mesonephric ducts may occasionally persist and develop into Gartner’s duct cysts.^[1] These cysts are typically <2 cm in size, remain asymptomatic, and are often identified incidentally during routine pelvic evaluations. In some instances, they may grow larger and lead to symptoms such as a feeling of vaginal fullness, pelvic discomfort, pain during intercourse (dyspareunia), or urinary complaints. Diagnosis is usually established through pelvic examination and imaging methods such as ultrasonography or magnetic resonance imaging (MRI).^[2]

Symptomatic or complicated cysts are usually managed by surgical removal.

CASE REPORT

Here, we present a case of a 41-year-old female who presented to the gynecological department with complaints of heavy menstrual bleeding for 2 months. Ultrasound examination revealed a thickened endometrium of size 14 mm along with an endometrial polyp. Intraoperatively, a posterior vaginal wall cyst was discovered incidentally which was excised and sent for histopathological examination.

Histopathology revealed a cyst wall lined by a single layer of cuboidal to low columnar non-mucinous epithelium [Figures 1-4].

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Figure 1:

Cyst wall 40× magnification.

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Figure 2:

Cyst wall 20× magnification.

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Figure 3:

Cyst wall 20× magnification.

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Figure 4:

Cyst wall lined by low cuboidal epithelium 40× magnification.

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DISCUSSION

Gartner duct cysts are benign vaginal lesions that account for approximately 7–21% of all vaginal cysts observed in adult females. They are most commonly located in the anterolateral vaginal wall, particularly at the 11 o’clock and 1 o’clock positions, and may occasionally extend into the deeper layers of the vaginal tissue.^[3] Clinical evaluation through pelvic examination and transvaginal ultrasonography is typically adequate for diagnosis. Although MRI offers superior anatomical detail, its routine use is not warranted due to cost considerations and the sufficiency of basic imaging modalities in most cases.^[4,5]

From an embryological perspective, the female reproductive tract arises from the Müllerian (paramesonephric) ducts, whereas the mesonephric (Wolffian) ducts regress, leaving behind vestigial remnants. Persistence of these remnants can give rise to Gartner duct cysts, which tend to follow the anatomical course of the mesonephric ducts along the anterolateral vaginal wall. While often asymptomatic, these cysts may occasionally present with dyspareunia, a palpable vaginal mass, or urinary symptoms.

Malignant transformation of Gartner duct cysts is exceedingly rare.^[6] Management typically involves surgical excision when the cysts are symptomatic or significantly enlarged. However, conservative observation may be appropriate in asymptomatic and small lesions.^[7] Histopathological examination generally reveals a cyst wall lined by non-mucinous cuboidal to low columnar epithelium, often surrounded by smooth muscle bundles [Figures 1-4].^[8,9]

CONCLUSION

Gartner duct cysts, though often asymptomatic, are important remnants of mesonephric origin that can be incidentally discovered. This case highlights the significance of routine intraoperative vigilance in identifying such lesions. Accurate diagnosis through histopathology ensures appropriate management and excludes malignancy. Awareness of these cysts can aid in better clinical assessment and patient care.