GAMUT H-133
LARGE SOFT TISSUE MASS IN THE PELVIS (MRI, Salpingography)
(See also H-134, H-135, H-136, H-137)

COMMON
1. Abscess G    
2. Bladder enlargement (See H-96)
3. Feces in colon 
4. Fluid-filled loop of bowel
5. Hematoma
6. Hydrosalpinx  
7. Ovarian cyst or neoplasm (eg, dermoid  ; carcinoma ) (See H-182, H-183)
8. Pregnancy (incl. ectopic pregnancy; retained products of conception )
9. Uterine neoplasm (eg, fibroid  ; mole ; carcinoma; leiomyosarcoma )


UNCOMMON
1. Bone tumor (eg, chordoma; Ewing sarcoma; osteosarcoma; chondrosarcoma)
2. Extraperitoneal neoplasm, other (lymphoma G; Burkitt's lymphoma ; spindle cell tumor G; neurogenic tumor)
3. Hemato- or hydrometrocolpos
4. Hydatid cyst
5. Lymphadenopathy, coalesced 
6. Meningocele, anterior sacral
7. Pelvic kidney
8. Pelvic lipomatosis 
9. Soft tissue sarcoma (eg, rhabdomyosarcoma; liposarcoma; leiomyosarcoma)
10. Teratoma (eg, retroperitoneal; presacral; ovarian)