How to Calculate the GOG Score

A GOG score, or Gynaecologic Oncology Group score, is a figure that attempts to quantify the risk of gynaecological cancer after radical hysterectomy surgery. It's estimated that if you have a GOG score greater than 120 three years after surgery, your risk of recurrence is 40%. To calculate the score you need to know three things: the tumor size, the lympho-vascular space involvement (LVSI) and the relative-risk for depth of tumor invasion.

Things You'll Need

• Tumor size
• LVSI
• Depth of tumor invasion
• Calculator

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Instructions

• 1

  Determine the tumor's size. As an example, a tumor has size of 5 mm.

• 2

  Determine the relative-risk for depth of the tumor. A tumor with 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm or 10 mm penetration will have a relative risk of 1.0, 3.0, 7.2, 14, 21, 26 or 31, respectively. Following the example, because the tumor is 5 mm it would have a relative-risk for depth of 7.2.

• 3

  Determine if the tumor has lymphatic space involvement. If it does not, use 1.0 in the calculation. If it does, use 1.7 in the calculation. In the example, a tumor does have lymphatic space involvement.

• 4

  Multiply the tumor size by the relative-risk for depth figure by the lymphatic space involvement figure to calculate the GOG score. In the example, multiply 5 by 7.2 by 1.7. The GOG score is 61.2.