Serous cysts are a benign component of the cyclic ovary in the guinea pig with an incidence dependent upon inhibin bioactivity. (1/5)

Ovaries were collected from normal cycling female guinea pigs on each day of the estrous cycle (n = 5 per day) for histological analysis of ovarian morphology. Three types of ovarian cysts were observed: serous cysts, follicular cysts and parovarian cysts. The most common were serous cysts (cystic rete ovarii), which were present throughout the estrous cycle with an overall incidence of 63.5% (54 out of 85 animals). Follicular cysts occurred in 22.4% of guinea pigs overall (19 out of 85). Only one parovarian cyst (1 out of 85) was observed in the present experiment. Follicular cysts always coincided with serous cysts and were less common during diestrus. The incidence of serous cysts did not vary significantly across the estrous cycle. In a second experiment, cycling female guinea pigs were arrested in a prolonged luteal phase by a progesterone implant in order to achieve ovarian synchrony. They were then treated with inhibin antiserum (0.5 or 1 ml per animal i.v.; n = 6 per group) or normal goat serum (controls; n = 6 per group). There was a dose dependent increase in the incidence of serous ovarian cysts following passive immunization against the inhibin alpha-subunit. These results suggest that serous cysts are a normal component of the cyclic guinea pig ovary and that alterations in the inhibin-follicle-stimulating hormone system appear to modulate the incidence of serous ovarian cysts in this species.  (+info)

Torsion of parovarian cyst--report of two cases. (2/5)

A parovarian cyst oxiginates from the tissue of the broad ligament, predominantly from mesothelium covering the peritoneum but also from paramesonephric and mesonephric remnants. Clinically, torsion of a parovarian cyst is uncommon, and it is difficult to distinguish it from torsion of other adnexal masses, an ovarian accident, appendicitis, etc. Recently, we experienced two cases of torsion of parovarian cysts. In one case, it was associated with 32 weeks' intrauterine gestation. In this case, pelvic sonography during the first and second trimester showed no cystic lesions. In the other case, a lower abdominal pain continued about two weeks. A sonogram revealed a very small cyst like a follicle. These twisted parovarian cysts were removed at laparotomy. The clinical and pathological features of the torsion of parovarian cysts are briefly discussed and the literature is reviewed.  (+info)

A giant parovarian cyst in a dog with a granulosa cell tumor. (3/5)

A 13-year old intact female poodle showed persistent signs of estrus. Ultrasonographically, a large cystic mass containing echogenic fluid with a thin wall was observed, and it was 8 cm in diameter. The cystic mass was located at the mesovarium between the left ovary and uterine horn, and it was identified as a giant parovarian cyst. A right ovarian mass was histologically diagnosed as a granulosa cell tumor. Persistent estrogen hormone secretion by the granulosa cell tumor was thought to cause a rapid increase in the size of the parovarian cyst. This rare cystic mass originated from the genital system and was differentiated from the uterus.  (+info)

Borderline paratubal cyst: a case report. (4/5)

Borderline para-ovarian cysts (PCs) are rare entities. They are commonly present in the third decade. Borderline PCs are often discovered fortuitously on routine ultrasound examination or they are common incidental findings during a laparotomy. They must be differentiated from simple ovarian cysts, peritoneal inclusion cysts and hydrosalpinges on ultrasound sonography. Papillary projections on the cyst wall should be searched carefully to suggest diagnosis. The treatment is surgical including fertility -sparing operation or more radical surgery depending on the case. The prognosis is good because borderline PCs are usually early-stage at diagnosis. Here is a report of a 38- year old woman with a borderline paratubal cyst. Adnexal torsion of hydrosalpinx was suspected; thus, she underwent an urgent surgery. Cystectomy was performed without rupture. The final diagnosis revealed a borderline PC. The patient underwent a radical surgery. Currently, she has had no evidence of disease recurrence.  (+info)

Laparoscopic removal of a giant paratubal cyst complicated by hydronephrosis. (5/5)

Paratubal cysts represent approximately 10% of all adnexal masses. In most cases they are very small, but very few cases are reported in the literature where they exceed 15 cm of diameter. Furthermore, giant paratubal cysts complicated by bilateral hydronephrosis are unique. The Authors describe a case of a huge paratubal cyst (30 cm in diameter), in a 14 year old obese girl, treated by complete laparoscopic enucleation.  (+info)