Follicular cyst of ovary
Classification and external resources
ICD-10	N83.0
ICD-9	620.0

One type of simple cyst, which is the most common type of ovarian cyst, is the follicular cyst of ovary, or graafian follicle cyst, or follicular cyst. This type can form when ovulation doesn't occur, and a follicle doesn't rupture or release its egg but instead grows until it becomes a cyst, or when a mature follicle involutes (collapses on itself). It usually forms during ovulation, and can grow to about 6cm (2.3 inches) in diameter. It is thin-walled, lined by one or more layers of granulosa cell, and filled with clear fluid. Its rupture can create sharp, severe pain on the side of the ovary on which the cyst appears. This sharp pain (sometimes called mittelschmerz) occurs in the middle of the menstrual cycle, during ovulation. About a fourth of women with this type of cyst experience pain. Usually, these cysts produce no symptoms and disappear by themselves within a few months. Ultrasound is the primary tool used to document the follicular cyst. A pelvic exam will also aid in the diagnosis if the cyst is large enough to be seen. A doctor monitors these to make sure they disappear, and looks at treatment options if they do not.^{[1][2][3][4][5][6]}

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v • d • e Diseases of the pelvis and genitals (N40-N99, 600-629) Female Adnexa Ovary Oophoritis · Ovarian cyst (Follicular cyst of ovary, Corpus luteum cyst, Chocolate cyst of ovary) · Ovarian hyperstimulation syndrome · Anovulation · Mittelschmerz Fallopian tube Salpingitis · Hydrosalpinx · Hematosalpinx Parametrium Parametritis Uterus Endometrium: Endometriosis (Adenomyosis) · Endometrial polyp menstruation (Amenorrhoea, Anovulation, Hypomenorrhea, Oligomenorrhea, Menorrhagia, Menometrorrhagia, Metrorrhagia, Dysmenorrhea) Hematometra · Retroverted uterus · Asherman's syndrome Cervix Cervicitis - Cervical polyp - Nabothian cyst Vagina Vaginitis (Bacterial vaginosis, Atrophic vaginitis, Candidal vulvovaginitis) · Leukorrhea · Hematocolpos/Hydrocolpos Sexual dysfunction (Dyspareunia, Hypoactive Sexual Desire Disorder, Sexual arousal disorder, Vaginismus) Prolapse (Cystocele, Rectocele, Urethrocele) · Fistulae (Vesicovaginal, Rectovaginal) Vaginal discharge Vulva Vulvitis · Bartholin's cyst Clitoral hood or Clitoris Clitoral phimosis · Clitorism Other/general Pelvic inflammatory disease · Female infertility (Habitual abortion) Male Testicular Orchitis · Hydrocele testis · Testicular torsion · Male infertility (Azoospermia, Oligospermia) Epididymis Epididymitis · Spermatocele · Hematocele Prostate Prostatitis (Acute prostatitis, Chronic bacterial prostatitis, Chronic prostatitis/chronic pelvic pain syndrome) · Benign prostatic hyperplasia Penis Balanoposthitis/Balanitis · Phimosis · Priapism · Sexual dysfunction (Erectile dysfunction) · Peyronie's disease · Penile fracture Other Hematospermia · Retrograde ejaculation reproductive system navs: anat female,male/physio/dev, noncongen/congen/neoplasia, symptoms+signs/eponymous, proc