The epoophoron or epoöphoron (also called organ of Rosenmüller or the parovarium) is a remnant of the mesonephric tubules that can be found  next to the ovary and fallopian tube. Anatomy
It may contain 10–15 transverse small ducts or tubules that lead to the Gartner’s duct (also longitudinal duct of epoophoron) that represents the caudal remnant of the mesonephric duct and  passes through the broad ligament and the lateral wall of the cervix and vagina. The epoophoron is a homologue to the epididymis in the male. While the epoophoron is located in the lateral portion of the mesosalpinx and mesovarium, the paroophoron (residual remnant of that part of the mesonephric duct that forms the paradidymis in the male) lies more medially in the mesosalpinx. Histology
It has a unique histological profile. Clinical significance
Clinically the organ may give rise to a local paraovarian cyst or adenoma. See also
List of homologues of the human reproductive system
Vesicular appendages of epoophoron

References
External links
figures/chapter_35/35-8.HTM: Basic Human Anatomy at Dartmouth Medical School
genital-016a—Embryo Images at University of North Carolina
Swiss embryology (from UL, UB, and UF) ugenital/genitinterne05
Cysteamine hydrochloride (5%) over-the-counter Mechanism of action seems to involve inhibition of melanin synthesis pathway
Kojic acid (2%) OTC
Flutamide (1%)
Chemical peels
Microdermabrasion to dermabrasion (light to deep)
Galvanic or ultrasound facials with a combination of a topical crème/gel, either in an aestheticians office or as a home massager unit
Laser but not intense pulsed light (which can make the melasma darker)

Effectiveness
Evidence-based reviews found that the most effective therapy for melasma includes a combination of topical agents. Triple combination creams formulated with hydroquinone, tretinoin, and a steroid component have shown to be more effective than dual combination therapy or hydroquinone alone. More recently, a systematic review found that oral medications also have a role in melasma treatment, and have been shown to be efficacious with a minimal number and severity of adverse events. Oral medications and dietary supplements employed in the treatment of melasma include tranexamic acid, Polypodium leucotomos extract, beta‐carotenoid, melatonin, and procyanidin.Oral procyanidin combined with vitamins A, C, and E shows promise as safe and effective for epidermal melasma. In an 8-week randomized, double-blind, placebo-controlled trial in 56 Filipino women, treatment was associated with significant improvements in the left and right malar regions, and was safe and well tolerated.In all of these treatments, the effects are gradual and a strict avoidance of sunlight is required. The use of broad-spectrum sunscreens with physical blockers, such as titanium dioxide and zinc oxide, is preferred,  because UV-A, UV-B, and visible lights are all capable of stimulating pigment production.