RUPTURED DERMOID CYST: AN EMERGENCY IN GYNAECOLOGICAL PRACTICE INTRODUCTION: RUPTURE OF A DERMOID CYST IS A VERY RARE CONDITION DUE TO ITS THICK CAPSULE RESULTING IN INFREQUENT COMPLICATION SUCH AS ACUTE OR CHRONIC PERITONITIS AND MAY NOT SHOW ANY CLINICALLY DISTINGUISHABLE FEATURES FROM CYST TORSION. CASE REPORT: A 28YEAR OLD WOMEN ADMITTED TO GYNAECOLOGICAL DEPARTMENT WITH 2 DAY HISTORY OF DULL ACHING PELVIC PAIN INCREASING IN INTENSITY WITH NO HISTORY OF FEVER, NAUSEA, VOMITING, NO KNOWN AGGRAVATING FACTORS. SHE IS PARA 1 LIVE 1 WITH PREVIOUS VAGINAL DELIVERY, KNOWN CASE OF DERMOID CYST DIAGNOSED INCIDENTALLY DURING HER ANTENATAL CHECKUP 2 YEARS BACK. SHE HAS NO RELEVANT MEDICAL OR SURGICAL HISTORY. ON EXAMINATION -HER VITALS WERE BP-110/70MMHG PR-104BPM SPO2-98% HB- WBC COUNT – ABDOMINAL EXAMINATION WAS SOFT, WITH REBOUND TENDERNESS+ GUARDING RIGIDITY+, PELVIC EXAMINATION WAS NOT DONE. HER USG FINDINGS SHOWED RIGHT OVARY WITH THICK-WALLED CYST MEASURING 5.7 X 4.4 X 5.7CM WITH POSTERIOR acoustic shadowing S/O DERMOID CYST RIGHT ADNEXA SHOWED WHIRLPOOL SIGN? TORSION OF RIGHT TUBE. SHE WAS PLANNED FOR LAPAROSCOPIC REMOVAL INTRAOPERATIVELY COPIOUS THICK SEBACEOUS TYPE MATERIAL ALL OVER THE ABDOMEN WITH FILMSY ADHESIONS ALL OVER ABDOMINAL WALL.SHE WAS MANAGED WITH DERMOID REMOVAL WITH RIGHT SALPHINGO OPHERECTOMY WITH THOROUGH PERITONEALWASHINGS. HISTOPATHOGICAL EXAMINATION CONFIRMED THE DIAGNOSIS OF MATURE CYSTIC TERATOMA .AND ABODMINAL PUS CULTURE SHOWED NO BACTERIAL GROWTH. POST OPERATIVE WAS UNEVENTFUL AND WAS DISCHARGED ON POD 2. CONCLUSIONS: THIS CASE ILLUSTRATES THE CLINICAL IMPLICATIONS AND SURGICAL SOLUTIONS WITH THE HELP OF RADIOLOGICAL ASSESSMENT