Background
Pulmonary deportation of hydatidiform mole is an exceedingly rare entity. The underlying mechanisms and proper management strategies remain unclear based on sporadic case reports over the past six decades. This study aimed to investigate the clinical features and rational treatment of patients with benign molar pregnancies with pulmonary deportation based on our experience.
Methods
Medical records of 20 cases of hydatidiform mole with pulmonary deportation were retrospectively reviewed at Peking Union Medical College Hospital from November 2006 to May 2019. The detailed information of all patients was recorded and analyzed. Patients were divided into different groups according to their characteristics and Mann-Whitney
U
test was used to compare the duration to achieve a normal β-human chorionic gonadotrophin (β-hCG) level after the first evacuation among groups.
Results
Initial pulmonary computed tomography scans showed suspected bilateral, left and right chest deportation of hydatidiform mole in 12, four, and four patients, respectively, with the maximum nodular diameter ranging from 0.6 to 1.2 cm. Ten patients achieved lesion resolution while the remaining ten patients achieved decreases in the size of their pulmonary lesions. The median duration to achieve a normal β-hCG level after the first evacuation was 15.5 (13.0, 21.9) weeks. There was no significant difference in the duration to achieve a normal β-hCG level after the first evacuation between two groups based on age (≥40 years
vs
. < 40 years: 15.8 [12.2, 21.5] weeks
vs
. 15.5 [12.9, 23.0] weeks,
Z
= 0.094,
P
= 0.925), type of antecedent mole (partial mole
vs
. complete mole: 15.2 [12.5, 27.4] weeks
vs
. 15.9 [12.9, 21.5] weeks,
Z
= 0.165,
P
= 0.869), distribution of pulmonary nodules (bilateral lungs
vs
. unilateral lung: 15.2 [12.8, 22.5] weeks
vs
. 15.9 [13.2, 22.2] weeks,
Z
= 0.386,
P
= 0.700), maximum size of pulmonary nodules (>0.5 cm
vs
. ≤0.5 cm: 13.0 [11.3, 17.2] weeks
vs
. 16.0 [14.5, 23.8] weeks,
Z
= 1.815,
P
= 0.070), and number of uterine evacuations (once
vs
. twice or three times: 15.0 [13.0, 16.3] weeks
vs
. 16.0 [12.8, 23.9] weeks,
Z
= 0.832,
P
= 0.405). The post-molar cohort was followed up for 17 to 139 months, and no gestational trophoblastic neoplasia was observed.
Conclusions
No surgeries other than uterine evacuation and no chemotherapy regim...