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| Imaging features and diagnostic value of magnetic resonance imaging of cesarean scar pregnancy |
| Wenjiang District People's Hospital of Chengdu, Chengdu, Sichuan Province, 611130 |
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Abstract To explore the imaging features and diagnostic value of magnetic resonance imaging (MRI) of cesarean scar pregnancy (CSP). Methods: The clinical data of 106 patients with CSP treated in the hospital between March 2018 and March 2021 were collected retrospectively. The uMR780 scanner was used to obtain pelvic MRI images of all these patients. Imaging features of MRI of the patients and its diagnostic value were analyzed. Results: In the imaging features of MRI for diagnosing CSP of 104 patients, there were 75 (72.1%) patients with simple cystic gestational sacs of round, and oval long T1 and long T2 signals and clear boundaries, and 29 (27.9%) patients with mass-shaped gestational sacs of round, and lumpy long T1 and the mixed high and low T2 signals. The maximum diameter, gestational sac volume, and length of intersection with the uterine scar of the mixed mass-shaped gestational sac were significantly higher than those of simple cystic gestational sac (P<0.05). Among the 106 patients with CSP, there were 43 (41.3%) cases with endogenous CSP, and 61 (58.7%) cases with exogenous CSP. The scar thickness and gestational sac volume of the endogenous CSP were significantly higher than those of the exogenous CSP, and the area of the contact surface between the sac and the scar, and the ratio of abundant blood supply around the gestational sac of the endogenous CSP were significantly lower than those of the exogenous CSP (P<0.05). The detection rate of cystic and mixed mass of CSP by MRI was 98.1%, and the detection rate of endogenous or exogenous CSP by MRI was 97.2%, which had no statistically significant different from those of pathological results (P＞0.05). Conclusion: MRI scan can show the imaging features of CSP, and there are differences in the maximum diameter, the gestational sac volume, and length of intersection of the gestational sac with uterine scars between mixed mass and cystic gestational sac. Besides, there are significant differences in the thickness of the thinnest part of the scar, the gestational sac volume, and the abundance of blood supply around the gestational sac between the endogenous and the exogenous gestational sacs. Clinically, the CSP classification based on relevant features can improve the detection rate of the patients with CSP.
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