Fibroepithelial Polyps of the Vagina in Pregnancy.

Abstract

A 25-year-old primigravida mother at 36 weeks pregnancy presented with mass descending per vaginum for last one month. In the antenatal history she had regular antenatal visits without any pregnancy complication. General and systemic examination revealed no abnormality. On local examination of external genitalia, there was a large pedunculated polyp [Table/Fig-1] of the vagina which measured 8 x 6 cm with multiple large atypical polyps found inside the vagina. Cervix was healthy and os was closed. An excisional biopsy of the largest polyp was done and histopathology revealed benign fibroepithelial polyps. So decision was taken to allow spontaneous vaginal delivery. Since operative vaginal delivery should be avoided in such cases to reduce the risk of trauma and haemorrhage [1]. Her pregnancy continued well and she went in to spontaneous labour at 40+2 weeks. But caesarean section was done for intrapartum fetal distress. On follow up after 6 weeks, the patient is asymptomatic and the polyps were reduced in size and number which proved their hormone dependant nature [Table/Fig-2]. [Table/Fig-1]: Large pedunculated polyp with multiple fibroepithelial polyps of vagina [Table/Fig-2]: After 6 weeks polyps reduced in size and numbers Fibroepithelial polyps of the vagina (FEPV) are mucosal polypoid lesions with a connective tissue core covered by a benign squamous epithelium [2]. They are thought to be rare as few cases are reported in literature and the cases are compared with the present case in [Table/Fig-3]. [Table/Fig-3]: Comparison of reported cases in literature with the present case The aetiology of FEPV may be as a result of a granulation tissue reaction after some local injury of the vaginal mucosa. It is because of delayed differentiation of myofibroblastic stromal cells which explains why granulation tissue sometimes does not contract properly but turns into polyps [2]. But during pregnancy hormonal factors may modulate the growth of FEPVs. Hartmann CA et al., reported after examination with immunohistochemistry that FEPV expressed vimentin, desmin, and receptors for estrogen and progesterone which indicates the hormone dependant nature of these polyps [3]. Although benign, it can be confused with malignant connective tissue lesions because of its bizarre histology. The differential diagnoses are sarcoma botryoides, rhabdomyosarcoma and mixed mesodermal tumour [4]. Histopatholgy confirms the diagnosis. The other terminologies of FEPV reported in literature are Pseudosarcoma botryoides, Cellular pseudosarcomatous fibroepithelial stromal polyps and Polyposis vaginalis [5,6]. Treatment of FEPV is simple local excision [7,8]. It can be performed after pregnancy as an interval procedure when the vaginal vascularity has returned to normal. Recurrence is extremely uncommon [9]. Nucci MR et al., studied 65 cases of FEPV and reported that awareness of the spectrum of histopathologic features that these lesions can exhibit and is crucial in their accurate diagnosis thus avoiding potential overtreatment [5]. FEPV in pregnancy is a rare lesion. Although benign, it can be confused with some malignant tumours. Histopathology confirms the diagnosis. Treatment is simple local excision and recurrence is uncommon. Hence knowledge of clinical and histopathological features of these lesions is important for accurate diagnosis for avoiding potential overtreatment.