Introduction: Mucinous Cystadenoma carcinoma is a type of tumor in the cyst adenocarcinoma grouping it can occur in the breast as well as the ovary. Tumors are normally multiocular with various smooth thin-walled cysts. Within the cyst is found an emergence or cellular debris. Patient History: The female patient 63-year-old who was admitted to AVBRH on the date 21/05/2021 in the obstetric and gynae ward with a chief complaint of generalized weakness, loss of appetite, fever for 2 days 7 days ago, 2-3 fever spikes and burning micturition. All over investigation observed like blood and urine investigation, CT scan of the abdomen, histopathology then the final diagnosis is confirmed as mucinous Cystadenoma carcinoma. Pharmacology: The patient was treated with antibacterial medicine, antibiotics, and diabetics, thyroxin stimulating drugs, etc. Management: Inj. Ceftriaxone 1gm 12 hourly, Inj.-piptaz 4.45 gm, 8 hourly, tab. Gimipride 0.5 mg with tab. Metformin 500 mg 12 hourly, tab. Thyrox 62.5 mcg, tab telmisartan 40 mg with tab. Chlorthalidone 12.512.5 mg 12 hourly, Inj.-pan 40 mg, 12 hourly, Inj.- Neomol 100 ml, and Tablet- nitrofurantoin 6 hourly. Nursing Management: Monitor the vital sign, monitor nutritional status and monitor random blood sugar. Maintained bed rest of patient, managed the pain level of the patient. The patient was assessed for risk of bleeding. Conclusion: The patient was admitted to the hospital with the chief complaint of generalized weakness, loss of appetite, fever for 2 days 7 days ago, 2-3 fever spikes and burning micturition. and the patient was admitted to AVBR Hospital in the obstetric and gynae ward, immediate treatment was started by a health team member and all possible treatments were given and now the patient's condition is satisfactory.