The distribution of fetal haemoglobin positive cells in trophoblastic diseases
| No | Disease | In inflammatory decidua | In haemorrhagic decidua | In chorion |
|---|---|---|---|---|
| (−), No haemorrhagic decidua present; CM, complete molar pregnancy; F-MLC, fetal haemoglobin positive myeloid cells; F-RBC, fetal haemoglobin positive red blood cells; ICM, incomplete molar pregnancy. | ||||
| 1 | CM | Randomly dispersed single F-RBC and F-MLC | (−) | None |
| 2 | CM | Clustered and dispersed F-MLC and F-RBC (fig 2C) | 2–3% F-RBC | None |
| 3 | CM | Randomly dispersed single F-RBC and F-MLC | (−) | None |
| 4 | CM | Large clusters of up to 20 F-MLC and F-RBC | 8% F-RBC | None |
| 5 | CM | None | 0.3% F-RBC | None |
| 6 | CM | None | 1% F-RBC | |
| 7 | CM | Randomly dispersed single F-RBC and F-MLC | (−) | None |
| 8 | CM | None | (−) | None |
| 9 | CM | None | (−) | None |
| 10 | ICM | Clusters of F-MLC mainly with only few F-RBC | (−) | None |
| 11 | ICM | Clusters of F-MLC mainly with only few F-RBC | (−) | None |
| 12 | ICM | Clusters of F-MLC mainly with only few F-RBC | 2% F-RBC | None |
| 13 | ICM | Randomly dispersed single F-MLC (fig 2D) | 2% F-RBC | None |
| 14 | ICM | Decidua not present | F-RBC mature and nucleated | |