Factors Affecting Adjacent Level Ossification Development after Anterior Cervical Discectomy and Fusion / 대한정형외과학회잡지

PURPOSE: The purpose of this study is to analyze the affecting factors of adjacent level ossification development (ALOD) after anterior cervical discectomy and fusion. MATERIALS AND METHODS: This study enrolled 75 patients who underwent anterior cervical discectomy and fusion and were followed-up for more than two years. Twenty-five patients were related with trauma and 47 patients were diagnosed as degenerative cervical disorder. We assessed the incidence, location and timing of ALOD, and compared the incidence of ossification between trauma and degenerative disease groups to know the effect of soft tissue damage. We also reviewed the correlation between the development of ossification at adjacent level and the factors, such as fusion level, age, operation time, duration of follow-up, and the presence of ossification of posterior longitudinal ligament (OPLL), as well as ossification of yellow ligament (OYL). RESULTS: Ossification developed in 33 patients (44%). Five cases (15%) were detected during the first year after surgery, 10 (30%) cases detected during the second year after surgery, 13 (40%) between second and third year, and 5 (15%) cases of more than three years after surgery. Only the fusion level was related with the development of ossification statistically (p<0.001). Age, operation time, duration of follow-up, sex ratio, presence of OPLL, and OYL were not related with the incidence of ossification significantly. There was no significant difference in the incidence of ALOD between the trauma group and degenerative disease group (p=0.3625). CONCLUSION: To detect ALOD, it needs a long time for follow-up after surgery. We thought that ALOD is affected by excessive loading at the adjacent level after fusion rather than severity of the soft tissue damage.

Surgical Management of Adnexal Mass during Pregnancy / 대한산부인과학회잡지

OBJECTIVE: The objective of this study was to evaluate the safety and timing of the surgery and fetal outcome of pregnancy complicated by a persistent adnexal mass that was required surgical intervention METHODS: We retrospectively reviewed 171 cases of adnexal masses during pregnancy that were required surgery at Samsung Cheil Hospital and Women's Healthcare Center between 1996 to 2001. We analysed medical records for characteristics of tumor, indication and timing of surgery and the effect of pregnancy outcome. Adverse pregnancy outcome is defined as preterm delivery, spontaneous abortion, intrauterine fetal death and perinatal death. The obtained data were analysed using t-test and Fisher's exact test by SPSS. RESULTS: The incidence of adnexal masses during pregnancy that required surgical management was 1 in 292.3 live births. A malignant tumor or a tumor of low malignant potential was found in 7% of cases. A total of 43 patients underwent surgery under emergency condition, 31 (72%) of which were done due to torsion. There were 14 preterm delivery, 3 spontaneous abortion, 1 intrauterine fetal death, 1 perinatal death and 2 artificial abortion in this study. There was a significant difference in adverse pregnancy outcome between elective and emergency group (7/118 [5.9%] versus 11/43 [25.6%] P=.001), and surgery group that before 20 week's gestation and those of after 20 week's gestation (12/145 [8.3%] versus 6/16 [37.5%] P=.004). CONCLUSION: When necessary and feasible, surgery should be scheduled for the early portion of the second trimester, when organogenesis is complete and most spontaneous abortion have occurred, but before later risks of technical difficulties and premature labor. Also we recommend early diagnostic evaluation and immediate surgical intervention of adnexal masses as problematic adnexal mass diagnosed during pregnancy to prevent the risk of emergency surgery associated with adnexal complication (torsion, rupture and hemorrhage) and the risk of delayed diagnosis of malignancy.