Computed tomography-guided pararectal prostate fusion biopsy
https://doi.org/10.17650/1726-9776-2020-16-4-89-97
Abstract
Background. Prostate cancer (PCa) is one of the most common malignancies. The gold standard of PCa diagnostics is morphological examination of prostate tissues obtained using 10-12-core biopsy. However, the number of false-negative results and detected clinically insignificant forms of cancer remain high. Magnetic resonance imaging (MRI) is the most sensitive and specific method of radiation diagnosis of PCa. The use of MRI data for prostate biopsy (fusion-biopsy) increases the accuracy of this procedure.
Objective: to increase the accuracy of PCa diagnostics using targeted pararectal prostate biopsy guided by computed tomography (CT)/MRI.
Materials and methods. A total of 95 patients underwent CT/MRI-guided targeted pararectal biopsy between March 2015 and March 2020. The mean level of prostate specific antigen (PSA) was 13.7 ± 12.6 ng/mL. All men were found to have 1 to 3 lesions with a PI-RADS score between 3 and 5.
Patients were divided into 4 groups: 1st group (n = 33) included patients in whom transrectal access was impossible; 2nd group (n = 22) included patients with suspected local recurrence of PCa after brachytherapy; 3rd group (n = 28) included patients with a negative result of primary biopsy, but with growing PSA level; 4th group (n = 12) included patients who preferred targeted biopsy. We performed targeted biopsy of each suspicious lesion according to MRIscans. Then we performed ‘blind’ systematic 10-14-core biopsy, where we did not take into account the location of suspicious foci and they could be, therefore, accidentally used for sample collection for the second time.
Results. Histological examination revealed PCa in 71 out of 95 patients (74.7 %): in 27 out of 33 in 1st group (81.8 %), in 19 out of 22 in 2nd group (86.4 %), in 17 out of 28 in 3rd group (60.7 %), and in 8 out of 12 in 4th group (66.7 %). In 21 patients (29.6 %), PCa was diagnosed only in samples obtained using targeted biopsy; in 9 patients (12.7 %), PCa was diagnosed only in samples after systematic biopsy; in 41 patients (57.7 % PCa was detected by both targeted and systematic biopsy. Clinically significant cancer (Gleason score ≥7) was diagnosed in 84.5 % of cases after targeted biopsy and in 70.4 % of cases after systemic biopsy.
Conclusion. CT/MRI-guided prostate fusion biopsy increases the accuracy of PCa diagnostics by additional detection of clinically significant tumors, including those in patients in whom the rectal access is impossible.
About the Authors
A. A. KopylovRussian Federation
2 Litovskaya St., Saint-Petersburg 194100; 4 Prospekt Kultury, Saint-Petersburg 194291
Competing Interests: нет
V. P. Gorelov
Russian Federation
2 Litovskaya St., Saint-Petersburg 194100; 4 Prospekt Kultury, Saint-Petersburg 194291
Competing Interests: not
N. B. Margaryants
Russian Federation
49 Kronverkskiy Prospekt, Saint-Petersburg 197101
Competing Interests: not
S. I. Gorelov
Russian Federation
2 Litovskaya St., Saint-Petersburg 194100; 4 Prospekt Kultury, Saint-Petersburg 194291
Competing Interests: not
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Review
For citations:
Kopylov A.A., Gorelov V.P., Margaryants N.B., Gorelov S.I. Computed tomography-guided pararectal prostate fusion biopsy. Cancer Urology. 2020;16(4):89-97. (In Russ.) https://doi.org/10.17650/1726-9776-2020-16-4-89-97