Sir, Neurofibromas are tumors of neural crest origin with protean manifestations which can affect virtually every organ and system. Isolated involvement of the female genital organs by this disease is rare and clitoral hypertrophy is the most common presentation. Genital neurofibromas usually enlarge in size and become symptomatic during puberty and pregnancy; however, we report an isolated plexiform neurofibroma in one labium majus without clitoral involvement and with documented rapid growth in a pre-pubertal girl. A 9-year-old girl presented with a swelling in the vulval region present since birth and with progressive painless enlargement for the last two years. The mass remained completely asymptomatic till the age of six years when it started to increase in size, causing discomfort during walking. The girl was 112 cm tall, breasts were Tanner's stage I and pubic and axillary hair absent. Multiple (more than six) café-au-lait spots measuring >15 mm were present over the abdomen, back and buttocks (Figure 1). A 7.2 × 5.4-cm sized irregular growth was noted in the left labium majus leading to disfigurement. The clitoris was unremarkable. The growth was firm, not tender, irreducible, with ill-defined margins and without vaginal extension. Ultrasound showed a predominantly hypo-echoic lesion with septae without any pelvic organ abnormality. Fine needle aspiration cytology suggested a benign spindle cell tumor. The mass was excised and histopathology revealed plexiform neurofibromatosis (Figure 1). Multiple café-au-lait spots and histopathological slide showing a well circumscribed lesion composed of spindle cells in a loose fibrillary matrix in isolated vulvar plexiform neurofibroma in a pre-pubertal girl. Neurofibromatosis-1 (NF1) is an autosomal dominant neuro-cutaneous syndrome with a reported incidence of 1 in 3000 live births. It is a multisystem disorder which may affect virtually every structure of the body; however, involvement of the external genitalia is extremely unusual (1) and most commonly affects the clitoris. Non clitoral involvement, as in this case, is exceptionally rare. Labial neurofibromas grow in size during puberty and pregnancy (2), due to elevated sex steroids, growth hormone and/or other growth factors (3). To the best of our knowledge only five cases of isolated labial neurofibroma without clitoral involvement have been reported in the English literature, but all became symptomatic during or after pubertal transition. In our case no pubertal changes were present, suggesting causative factors other than steroids or growth hormone. The diagnosis of a labial neurofibroma should prompt a search for other stigmata of the disease. The mainstay of treatment for a symptomatic isolated neurofibroma is local resection with preservation of genital anatomy. Complete removal can be difficult because of size, encroachment into surrounding tissues and indistinct margins (4).