General information and ultrasonographic and histological characteristics
| Common-type cervical cancer (n=43) | Rare-type cervical cancer (n=21) | T/Z/χ2 | P value | |
| Demographics | ||||
| DemographicsAge (mean±SD) | 51.0±9.4 | 48.0±9.7 | 1.19 | 0.24 |
| Ultrasonography | ||||
| Tumor size (mean±SD) | ||||
| Craniocaudal (mm) | 39.58±12.94 | 31.62±14.06 | 2.25 | 0.03 |
| Anteroposterior (mm) | 29.35±10.90 | 23.05±10.96 | 2.17 | 0.03 |
| Laterolateral (mm) | 29.70±9.61 | 24.00±11.03 | 2.12 | 0.04 |
| Volume (cm3), median (IQR) | 17.89 (9.96, 34.14) | 10.61(1.77, 19.56) | −2.17 | 0.03* |
| Echogenicity, n (%) | – | <0.001†§ | ||
| Hypoechoic | 32 (74.42) | 5 (23.81) | ||
| Hyperechoic | 2 (4.65) | 0 | ||
| Isoechoic | 3 (6.98) | 13 (61.90) | ||
| Mixed echoic | 6 (13.95) | 3 (14.29) | ||
| Hysterocele, n (%) | – | 0.67† | ||
| No | 35 (81.39) | 16 (76.19) | ||
| Yes | 7 (16.28) | 5 (23.81) | ||
| Pregnancy | 1 (2.33) | 0 | ||
| Color score‡ | ||||
| 1 | 2 (4.65) | 5 (23.81) | ||
| 2 | 6 (13.95) | 3 (14.29) | ||
| 3 | 12 (27.90) | 4 (19.05) | ||
| 4 | 23 (53.50) | 9 (42.85) | ||
| Grade, n (%) | – | 0.51† | ||
| Poorly differentiated | 7 (16.28) | 6 (28.57) | ||
| Moderately differentiated | 26 (60.47) | 11 (52.38) | ||
| Well differentiated | 10 (23.26) | 4 (19.05) | ||
| Growth pattern, n (%) | 6.67 | 0.01 | ||
| Endophytic | 14 (32.56) | 14 (66.67) | ||
| Exophytic | 29 (67.44) | 7 (33.33) | ||
| HPV infection, n (%) | ||||
| No | 7 (16.28) | 11 (52.38) | 9.1 | 0.003 |
| Yes | 36 (83.72) | 10 (47.62) |
*Mann-Whitney U-test (rank-sum test of non-normal distribution data).
†Two-tailed Fisher’s exact test (expected frequency <1, accurate probability method).
‡Color score is a subjective estimation of the vascularity within the tumor (–, without value).
§Echogenicity compared with surrounding cervical tissue.
¶Data are presented as mean±SD or n (%). Other unmarked variables adopt Student’s t-test or χ2 tests.
HPV, human papillomavirus.