Collision tumour of the ovary

A collision tumour of the ovary is an uncommon ovarian neoplasm where there is co-existence of two adjacent but histologically distinct tumours with no histologic admixture at the interface.

The exact pathogenesis is not well known. They are most commonly composed of ovarian teratoma (typically mature cystic teratoma of the ovary 5) and an ovarian cystadenoma or ovarian cystadenocarcinoma (typically mucinous 5) while other histologic combinations are much less common (e.g. teratoma and granulosa cell tumour, cystadenocarcinoma and sarcoma).

When an ovarian tumour demonstrates imaging findings that cannot be subsumed under one histologic type, especially in cases of ovarian teratoma 1,4, a collision tumour should be considered.

Share article

Article information

rID: 14475
System: Gynaecology
Tag: cases
Synonyms or Alternate Spellings:
  • Collision tumours of the ovary

Support Radiopaedia and see fewer ads

Updating… Please wait.

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.