Ovarian mucinous cystadenoma


  • A 37 years old lady
  • Presented with abdominal discomfort
CT scan abdomen and pelvis in axial planes soft tissue window post contrast.

CT scan findings:

  • There is a well-defined cystic lesion with thin wall at left adnexal region measuring 7×8 cm. There are thin septa within the lesion.
  • No soft tissue component, no calcification
  • No fat component within the lesion.
  • The uterus appears normal. No abnormal lymph node is seen.

Intraoperative findings:

  • Laparoscopic cystectomy done
  • Uterus is normal in size.
  • Left ovary embedded at POD, mobilised easily, appears benign, smooth surface with no abnormal vessels seen.
  • Left fallopian tube is normal looking.
  • Right ovary is normal.
  • Bowel, liver surfaces are normal.

HPE findings:

  • Macroscopy: specimen labelled as left cyst wall consists of a piece of tissue measuring 50x1x6 mm. The cyst wall thickness is less than 1 mm.
  • Microscopy: Section shows multiple pieces of fibrous cyst wall mainly devoid of epithelial lining and a few areas lined by single layer of mucinous type epithelium with basally located nuclei. No stratification of nuclei or cytological atypia is identified. No evidence of malignancy.
  • Interpretation: Mucinous cystadenoma

Diagnosis: Left mucinous cystadenoma


  • Mucinous tumors represent a spectrum of benign, border to malignant histologic variants.
  • Among benign ovarian neoplasms, mucinous cystadenomas account for approximately 10–15 % of all cases.
  • Mucinous cystadenomas usually occur as a large, multiloculated cystic mass with mucus-containing fluid.
  • These tumors occur most commonly in women in their twenties to forties.
  • The mean size at presentation is 18 cm, and mucinous tumors can become extremely large and fill the entire abdominopelvic cavity, occasionally presenting with ureteral obstruction or abdominal compartment syndrome.
  • Most mucinous tumors are unilateral, especially when primarily ovarian in origin.
  • A mucinous tumor grossly limited to the ovary will not have occult lymph node metastasis.
Author: radhianahassan