Ovarian tumour staging if one ovary involved without surface involvement or rupture
**Core Concept**
The correct staging of ovarian tumors depends on the extent of tumor spread, involvement of the ovaries, and presence of metastasis. In this scenario, the question focuses on a tumor involving one ovary without surface involvement or rupture.
**Why the Correct Answer is Right**
According to the International Federation of Gynecology and Obstetrics (FIGO) staging system, ovarian cancer is staged based on the extent of spread. For a tumor involving one ovary without surface involvement or rupture, the correct stage is IA. This stage indicates that the tumor is limited to one ovary, with no surface involvement or rupture, and no ascites or metastasis to the peritoneal surfaces. The tumor is considered stage IA if it is limited to the ovary without any capsular rupture or tumor on the ovarian surface, and there are no malignant cells in the ascites or peritoneal washings.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the involvement of one ovary without surface involvement or rupture.
**Option B:** This option is incorrect because it is not a valid stage for ovarian cancer according to the FIGO staging system.
**Option C:** This option is incorrect because it does not accurately describe the tumor involvement in this scenario.
**Clinical Pearl / High-Yield Fact**
When staging ovarian cancer, it is essential to accurately assess the extent of tumor spread and involvement of the ovaries. The FIGO staging system is widely used and provides a framework for classifying ovarian cancer based on its extent.
**Correct Answer: A. Stage IA**