Imperial College London
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Professor Hashim Ahmed

Faculty of Medicine, Department of Surgery & Cancer

Chair in Urology (Clinical)
 
 
 
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Contact

 

hashim.ahmed

 
 
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Location

 

5L28Lab BlockCharing Cross Campus

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Summary

 

Publications

Citation

BibTex format

@article{Brizmohun:2017:10.1259/bjr.20170645,
author = {Brizmohun, Appayya M and Sidhu, HS and Dikaios, N and Johnston, EW and Simmons, LA and Freeman, A and Kirkham, AP and Ahmed, HU and Punwani, S},
doi = {10.1259/bjr.20170645},
journal = {British Journal of Radiology},
title = {Characterizing indeterminate (Likert-scored 3/5) peripheral zone prostate lesions with PSA density, PI-RADS scoring and qualitative descriptors on multi-parametric MRI},
url = {http://dx.doi.org/10.1259/bjr.20170645},
volume = {91},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - OBJECTIVE: To determine whether indeterminate (Likert-score 3/5) peripheral zone (PZ) multi-parametric MRI (mpMRI) studies are classifiable by Prostate-Specific Antigen (PSA), PSA density (PSAD), PI-RADS_v2 rescoring and morphological MRI features. METHODS: Men with maximum Likert-score 3/5 within their PZ were retrospectively selected from 330 men who prospectively underwent prostate mpMRI (3T) without an endorectal coil, followed by twenty-zone trans-perineal template prostate mapping biopsies ± focal lesion-targeted biopsy. PSAD was calculated using pre-biopsy PSA and MRI-derived volume. Two readers A and B independently assessed included men with both subjective Likert-score and PI-RADS_v2. Both readers then classified mpMRI morphological features in consensus. Men were divided into two groups: significant cancer (≥Gleason 3+4) or insignificant cancer (≤Gleason 3+3)/no cancer. Comparisons between groups were made separately for PSA&PSAD using Mann-Whitney test and morphological descriptors with Fisher's exact test. PI-RADS_v2 and subjective Likert assessment were descriptively compared and percentage inter-reader agreement calculated. RESULTS: 76 men were eligible for PSA&PSAD analyses, 71 for PI-RADS scoring, and 67 for morphological assessment (excluding significant image artefacts). Unlike PSA (p=0.915), PSAD was statistically different (p=0.004) between the significant 0.19 ng/ml2 (IQR: 0.13-0.29) and non-significant/no cancer 0.13 ng/ml2 (IQR: 0.10-0.17) groups. Presence of mpMRI morphological features wasn't significantly different between groups. Subjective Likert assessment discriminated patients with significant cancer better than PI-RADS_v2. Inter-reader percentage agreement was 83% for subjective Likert-scoring and 56% for PI-RADS_v2. CONCLUSION: PSAD may categorize presence of significant cancer in patients with Likert-scored 3/5 PZ mpMRI findings. Advances in knowledge: PSAD may be used in indeterminate PZ mpMRI to guide decisio
AU  - Brizmohun,Appayya M
AU  - Sidhu,HS
AU  - Dikaios,N
AU  - Johnston,EW
AU  - Simmons,LA
AU  - Freeman,A
AU  - Kirkham,AP
AU  - Ahmed,HU
AU  - Punwani,S
DO  - 10.1259/bjr.20170645
PY  - 2017///
SN  - 0007-1285
TI  - Characterizing indeterminate (Likert-scored 3/5) peripheral zone prostate lesions with PSA density, PI-RADS scoring and qualitative descriptors on multi-parametric MRI
T2  - British Journal of Radiology
UR  - http://dx.doi.org/10.1259/bjr.20170645
UR  - https://www.ncbi.nlm.nih.gov/pubmed/29189042
UR  - http://hdl.handle.net/10044/1/55334
VL  - 91
ER  -
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