Table 4.
Placental histopathology characteristics
| Characteristic | Myoma group | Non-myoma group | p value |
|---|---|---|---|
| Placental weight (g) | 484.9 ± 123.8 | 478.5 ± 112.7 | 0.62 |
| Small (< 10 percentile) placental weight (n (%)) | 23 (22.8) | 232 (22.8) | 0.99 |
| Large (> 90 percentile) placental weight (n (%)) | 11 (10.9) | 89 (8.7) | 0.49 |
| Placental thickness (cm) | 1.4 (1.3–1.5) | 2.0 (1.5–2.4) | 0.001 |
| Cord length (cm) | 50 (41–57) | 50 (42–60) | 0.31 |
| Assisted placental delivery (n (%)): | 6 (5.9) | 19 (1.9) | 0.01 |
| Placenta previa (n (%)) | 1 (1.0) | 3 (0.3) | 0.26 |
| Placenta accreta (n (%)) | 1 (1.0) | 1 (0.1) | 0.04 |
| Anatomic disorders (n (%)): | |||
|
- Single umbilical artery - Marginal insertion - Furcate cord insertion - Velamentous insertion - Circummarginate membranes insertion - Circumvallate membranes insertion - True knot - Hypercoiled umbilical cord - Bilobed placenta - Accessory lobe |
0 (0) 17 (16.8) 2 (2.0) 8 (7.9) 9 (8.9) 4 (4.0) 0 (0) 3 (3.0) 0 (0) 2 (2.0) |
10 (1.0) 244 (23.9) 3 (0.3) 94 (9.2) 138 (13.6) 7 (0.7) 10 (1.0) 5 (0.5) 18 (1.8) 13 (1.3) |
0.32 0.11 0.01 0.66 0.19 0.001 0.32 0.005 0.18 0.56 |
| Inflammatory disorders (n (%)): | |||
|
- Acute chorioamnionitis with moderate to severe maternal inflammatory response - Acute chorioamnionitis with moderate to severe fetal inflammatory response - Chronic deciduitis - Villitis of unknown etiology |
5 (5.0) 2 (2.0) 3 (3.0) 4 (4.0) |
66 (6.5) 26 (2.6) 5 (0.5) 36 (3.5) |
0.55 0.72 0.005 0.83 |
| Maturation disorders (n (%)): | |||
|
- Accelerated villous maturation - Delayed villous maturation - Distal villous hypoplasia - Increased syncytial knotting |
12 (11.9) 1 (1.0) 3 (3.0) 7 (6.9) |
65 (6.4) 23 (2.3) 15 (1.5) 72 (7.1) |
0.03 0.39 0.25 0.96 |
| Vascular disorders (n (%)): | |||
|
- Retroplacental hematoma/hemorrhage - Cord thrombosis - Intervillous thrombosis - Intervillous non-subchorionic fibrin - Focal Intramural fibrin - Villous infarction - Villous agglutination - Avascular villi - Perivillous fibrin deposition - Maternal vasculopathy - Fetal vasculopathy - Chorionic thrombosis - Chorangiosis - Subchorionic fibrin - Subchorionic thrombi - Fetal vascular malperfusion (one criteria) - Fetal vascular malperfusion (> one criteria) - Maternal vascular malperfusion (one criteria) - Maternal vascular malperfusion (> one criteria) |
2 (2.0) 0 (0) 8 (7.9) 0 (0) 2 (2.0) 3 (3.0) 0 (0) 1 (1.0) 13 (12.9) 11 (10.9) 0 (0) 1 (1.0) 10 (9.9) 4 (4.0) 11 (10.9) 4 (4.0) 1 (1.0) 39 (38.6) 15 (14.9) |
52 (5.1) 2 (0.2) 57 (5.6) 3 (0.3) 1 (0.1) 32 (3.1) 9 (0.9) 18 (1.8) 100 (9.8) 49 (4.8) 3 (0.3) 9 (0.9) 103 (10.1) 23 (2.3) 42 (4.1) 40 (3.9) 15 (1.5) 409 (40.2) 127 (12.5) |
0.39 0.66 0.34 0.59 0.0001 0.92 0.34 0.56 0.33 0.009 0.58 0.91 0.95 0.29 0.002 0.98 0.69 0.76 0.49 |
| Nucleated red blood cells (n (%)) | 1 (1.0) | 11 (1.1) | 0.93 |
| Chorangioma (n (%)) | 3 (3.0) | 5 (0.5) | 0.005 |
Data are median (quartiles) or mean ± standard deviation unless stated otherwise