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Large clitoral leiomyoma in a forty-two years old premenopausal woman.

INTRODUCTION: Clitromegaly can be congenital or acquired with the former type being more prevalent. The main etiology behind the acquired type is hormonal imbalance affecting mainly adult women. This type is seen mostly in association with polycystic ovarian syndrome, hyperthecosis, ovarian tumors, and clitoral cysts or it can be drug-induced. Clitoral leiomyoma is a rare benign tumor of female genitalia and is an uncommon cause of clitromegaly.

CASE REPORT: We reported a 42-year-old premenopausal woman with a progressively increasing mass since five years ago, who had attended our clinic with urinary retention. It was a fungating mass with ulceration arising from the crus of the clitoris with the size was 11 × 9 cm. After detailed laboratory investigations, she had normal karyotyping. Hormonal assay for testosterone, dehydroepiandrosterone sulphate, and follicle stimulating hormone, luteinizing hormone, parathormone, and prolactin levels revealed values within the normal range. Twenty-four hours urinary excretion levels of free cortisol and ketosteroids were within normal limits. Beta-hCG level was also in normal range. Thyroid function tests and X-ray chest results were normal. Contrast enhanced computed tomography (CECT) of the abdomen showed no abnormality in adrenals and there was no pituitary enlargement on brain MRI. Pelvis MRI showed a large 11 × 9 × 8 cm clitoral mass. Diagnostic biopsy done from ulcer margin was suggestive of leiomyoma. The mass was completely excised preserving the tip of clitoris. The histopathology showed spindle-shaped cells arranged in palisading form. On immunohistochemistry, tumor cells were positive for smooth muscle actin (SMA) as well as for estrogen and progesterone receptor (ER/PR), confirming the diagnosis of leiomyoma. The patient was regularly followed, and was doing well with no voiding difficulty.

CONCLUSIONS: We reported the world largest clitoral leiomyoma presenting with symptoms of acute urinary retention. MRI has important role in diagnosis and biopsy is confirmative with spindle-shaped cells arranged in palisading pattern and simple excision would be curative.

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