Pelvic masses/Tubo ovarian masses:
Tubo-ovarian abscess (TOA) is a serious complication of acute pelvic inflammatory disease (PID), which most commonly results from the spread of bacteria from the lower genital tract. It is a polymicrobial infection typically occurring in young sexually active women
Fibroids range in size from seedlings, undetectable by the human eye, to bulky masses that can distort and enlarge the uterus. You can have a single fibroid or multiple ones. In extreme cases, multiple fibroids can expand the uterus so much that it reaches the rib cage and can add weight. Many women have uterine fibroids sometime during their lives. But you might not know you have uterine fibroids because they often cause no symptoms. Your doctor may discover fibroids incidentally during a pelvic exam or prenatal ultrasound
Type of mass in the female reproductive tract tends to vary by age group:
                  • In infants, in utero maternal hormones may stimulate
                  development of follicular ovarian cysts in a fetus or during
                  the first few months of life. This effect is rare.
                  • In children, prepubertalmasses are uncommon. Ovarian masses
                  may be follicular ovarian cysts or, rarely, benign or
                  malignant tumors.
                  • In women of reproductive age, the most common cause of
                  symmetric uterine enlargement is pregnancy. Another common
                  uterine mass is a uterine fibroid, which sometimes extends to
                  the cervix or uterine connective tissues. Adnexal masses are
                  often related to the menstrual cycle; they include follicular
                  ovarian cysts (follicles that develop normally but do not
                  release an egg) and corpus luteal cysts. These cysts often
                  resolve spontaneously within a few months. Adnexal masses may
                  also result from ectopic pregnancy, ovarian cancer, fallopian
                  tube cancer, benign tumors (eg, benign cystic teratomas),
                  endometriosis, hydrosalpinges, or a tubo-ovarian abscess.
                  • In postmenopausal women, a new or growing pelvic mass is
                  more likely to be cancerous. Many benign ovarian or uterine
                  masses (eg, endometriomas, adenomas, fibroids) depend on
                  ovarian hormone secretion and thus do not develop or enlarge
                  after menopause. Metastatic cancer of the breast, colon, or
                  stomach may first manifest as an adnexal mass.