Table 2.

Modified WHO Prognostic Scoring System as adapted by FIGO for GTN

Scores	0	1	2	4
Age (years)	< 40	≥ 40	-	-
Antecedent pregnancy	mole	abortion	term	-
Interval months from index pregnancy	< 4	4-6	7-12	> 12
Pretreatment serum hCG (iu/1)	< 103	103-104	104-105	> 105
Largest tumour size (including uterus)	< 3	3-4 cm	≥ 5 cm	-
Site of metastases	lung	spleen, kidney	gastrointestinal	liver, brain
Number of metastases	-	1-4	5-8	> 8
Previous failed chemotherapy	-	-	single drug	≥ 2 drugs
To stage and allot a risk factor score, a patient’s diagnosis is allocated to a stage as represented by a Roman numeral I, II, III, and IV. This is then separated by a colon from the sum of all the actual risk factor scores expressed in Arabic numerals, i.e., stage II:4, stage IV:9. This stage and score will be allotted for each patient. (FIGO 2009). A score ≤ 6 indicates low-risk; > 6 indicates high-risk.

hCG = human chorionic gonadotrophin