DVH parameters and outcome for patients with early-stage cervical cancer treated with preoperative MRI-based low dose rate brachytherapy followed by surgery.
BACKGROUND
To our knowledge no DVH data have so far been reported for MRI-guided BT in the preoperative setting of early-stage cervical cancer. We assessed DVH parameters and clinical outcome using 3D MRI-guided preoperative intracavitary LDR BT.


METHODS
Thirty-nine patients with primary early cervical carcinoma (IB1 37, IIA 1 and IIB 1) were treated with preoperative MRI-based LDR BT, consisting of uterovaginal BT to a total dose of 60 Gy to the intermediate-risk CTV, followed 6 weeks later by bilateral salpingo-oophorectomy and extrafascial hysterectomy plus pelvic node dissection. Adjuvant chemoradiation was delivered to patients with pelvic lymph node involvement.


RESULTS
With a median follow-up of 4.4 years (range 2.6-6.6 years), local recurrence occurred in 1 patient (a lateropelvic relapse) (2.6%). The 4-year actuarial overall survival and disease-free survival were 94% (95% CI, 82-98), and 86% (95% CI, 67-95), respectively. The 2- and 4-year actuarial local relapse-free survival were 94 (95% CI, 86-100) and 91% (95% CI, 81-100), respectively. For intermediate-risk CTV, median D(100) and D(90) were 43 Gy(alpha)(/)(beta)(10) (range 2-74 Gy(alpha)(/)(beta)(10)) and 75 Gy(alpha/beta)(10), respectively (range 29-129 Gy(alpha/beta)(10)). For high-risk CTV, the median D(100) and D(90) were 69 Gy(alpha/beta)(10) (range 24-137 Gy(alpha/beta)(10)) and 109 Gy(alpha/beta)(10) (range 37-198 Gy(alpha/beta)(10)), respectively. Twenty grade 1-2 late complications were observed in 13 patients (33.3%): 10 bladder, 3 ureteral, 1 rectal, 1 small bowel, 1 vaginal, 1 pelvic fibrosis, 1 peripheral nerve, and 2 others. No grade 3 or 4 complication occurred.


CONCLUSIONS
MRI-guided brachytherapy with adaptation of the time duration and/or the length of each radioactive source allows both high local control and low toxicity in the preoperative settings of early-stage cervical cancers.
Haie-Meder
Christine
C
Department of Radiotherapy-Brachytherapy Service, Institut Gustave-Roussy, Villejuif, France. christine.haie@igr.fr
Chargari
Cyrus
C
Rey
Annie
A
Dumas
Isabelle
I
Morice
Philippe
P
Magné
Nicolas
N
D000328:Adult; D000368:Aged; D001918:Brachytherapy / Q000009:adverse effects; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted; D016896:Treatment Outcome; D002583:Uterine Cervical Neoplasms / Q000401:mortality / Q000473:pathology / Q000532:radiotherapy* / Q000601:surgery