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Aboumarzouk O.M.,Ninewells Hospital and Medical School | Aboumarzouk O.M.,Islamic University of Gaza | Mains E.,Ninewells Hospital and Medical School | Moseley H.,The Scottish Photodynamic Therapy Center | Kata S.G.,Ninewells Hospital and Medical School
Photodiagnosis and Photodynamic Therapy | Year: 2013

Objectives: We aimed to assess the diagnostic accuracy of photodynamic diagnostic ureterorenoscopy (PDD-FURS) in detection of UUT-TCC in comparison with CT Urogram (CTU) and WL-FURS. Material and methods: Between June 2009 and August 2011, 30 patients underwent PDD-FURS after CTU for suspicion of UUT-TCC. Ureterorenoscopy was performed for abnormal upper urinary tract on imaging. Oral 5-Aminolevulinic Acid (5-ALA) was used as a photosensitizer. All procedures were performed by single endourologist experienced in photodynamic diagnosis. The sensitivity, specificity, and detection rate of WL-FURS, PDD-FURS and CTU were calculated using the Meta-DiSc v1.4 programme. P values <0.05 were considered significant. Results: PDD-FURS detected more UUT-TCCs than CTU or WL-FURS (94% (16/17) vs. 76.5% (13/17) vs. 82% (14/17) respectively). PDD-FURS was not significantly more sensitive than CTU and WL-FURS to detect UUT-TCC (0.94 (95% CI: 0.71-0.99) vs. 0.82 (95% CI: 0.57-0.96) vs. 0.81 (95% CI: 0.54-0.96) respectively; PDD-FURS vs. CTU: P=. 0.249; PDD-FURS vs. WL-FURS: P=. 0.277). There was no difference in the specificity between PDD-FURS and WL-FURS (1.0 (95% CI: 0.75-1.0) and 1.0 (95% CI: 0.75-1.0) respectively) (P=. 1), while PDD-FURS was significantly more specific than CTU (CTU: 0.21 (95% CI: 0.05-0.51) (P<. 0.001). PDD-FURS picked up 3 cases of CIS, which was not seen on WL-FURL and CTU. Conclusion: Oral 5-ALA induced PDD-FURS has a high sensitivity and specificity to detect lesions and a higher detection rate to diagnose UUT-TCC than WL-FURS and CTU. It appears to be the only tool to visualise UUT CIS lesions. © 2012 Elsevier B.V.

Aboumarzouk O.,Ninewells Hospital and Medical School | Aboumarzouk O.,Islamic Universities of Gaza | Valentine R.,University of Dundee | Valentine R.,The Scottish Photodynamic Therapy Center | And 8 more authors.
Photodiagnosis and Photodynamic Therapy | Year: 2015

Background: Non-muscle invasive bladder cancer can be missed during white light endoscopy in up to 50% of cases. We aimed to test whether or not we could find a difference between benign and cancerous tissue wavelengths using laser induced autofluorescence spectroscopy can increase cancer detection. Materials and methods: We analysed 67 tissue samples using spectral analysis. The WavSTAT (Spectra Science) optical biopsy device was used to record fluorescence spectra from biopsied tissue enabling calculation of an AUC for each spectrum, a measure of the mean spectral wavelength (. λ- (nm)) and a dimensionless fluorescence ratio. Mann-Whitney test was used to compare the two groups. Results: We found that 49.3% (33/67) of the tissue was benign, 44.8% (30/67) was CIS/cancerous tissue, and the remaining 4/67 samples were atypia (2) and dysplasia (2).The median AUC for the benign tissue was 19.53 (interquartile range [IQR]: 5.35-30.39) and that for CIS/cancerous tissue was 7.05 (IQR: 2.89-14.24) (. P=. 0.002).The median wavelengths for the benign tissue and malignant tissue were 502.4. nm (IQR: 500.3-504.3. nm) and 505.2. nm (IQR: 502.1-513.2. nm), respectively (. P=. 0.003).The median fluorescence ratio was 0.080 (IQR: 0.070-0.088) for benign tissue and 0.096 (IQR: 0.079-0.221) for CIS/cancerous tissue (. P=. 0.002). Conclusions: We found statistical differences between the median AUC calculations and median wavelengths for the benign and cancerous tissue. We also found a statistical difference between the fluorescence ratios between the two tissue types. There seems to be a role for optical spectroscopy in verifying bladder lesions. © 2014 Elsevier B.V.

Kata S.G.,The Scottish Photodynamic Therapy Center | Aboumarzouk O.M.,Ninewells Hospital and Medical School | Zreik A.,Gartnavel General Hospital | Somani B.,University of Southampton | And 7 more authors.
Photodiagnosis and Photodynamic Therapy | Year: 2015

Background: Photodynamic diagnosis increases the detection rate and hence decreases recurrence rates of urothelial cancer (UC) of the bladder. This technique has been implemented in the upper urinary tract and like in the bladder, has shown to increase the detection rate of urothelial lesions. Objectives: To determine the sensitivity, specificity, and detection rates for photodynamic diagnostic flexible ureterorenoscopy (PDD-FURS) and white light ureterorenoscopy (WL-FURS).Design between 2009 and 2013, PDD-FURS was performed within 106 Upper urinary tract (UUT) Units (Mean age-72.6. ±. 9.5). Indications for the procedure included abnormal upper urinary tract on imaging, normal flexible cystoscopy with abnormal urine cytology, endoscopic treatment and follow-up of UUT UC. Oral 5-aminolevulinic acid was used as the photosensitizer administered 3-4. h pre-operatively. Results: 48 lesions were detected, of which 95.8% (46/48) where visualised by PDD-FURS compared to 47.9% (23/48) shown by WL-FURS (P <. 0.0001). PDD-FURS detected significantly more carcinoma in situ (CIS) or dysplasia lesions than WL-FURS (93.75% (15/16) vs. 18.75% (3/16), respectively, (P = 0.0006)). Furthermore, PDD-FURS detected significantly more UC lesions than WL-FURS (96.9% (31/32) vs. 62.5% (20/32) (P = 0.007)).PDD-FURS was more sensitive (95.8; range: 85.7-99.5) than WL-FURS (53.5; range: 37.7-68.8) in detecting UUT-UC (P <. 0.0001). There was no difference (P = 0.716) in the specificity between PDD-FURS (96.6; range: 88.1-99.6) and WL-FURS (95.2; range: 86.7-99). Conclusions: Our results PDD-FURS with oral 5-ALA as photosensitizer suggest higher sensitivity and detection rate of urothelial tumours than WL-FURS, with a good safety profile. In our series, PDD-FURS enhanced the visualisation of flat lesions, such as CIS and dysplasia that otherwise would have been missed. © 2015 Elsevier B.V.

Kulyk O.,University of St. Andrews | Ibbotson S.H.,University of Dundee | Ibbotson S.H.,The Scottish Photodynamic Therapy Center | Moseley H.,University of Dundee | And 4 more authors.
Photodiagnosis and Photodynamic Therapy | Year: 2015

Background: Topical Photodynamic therapy (PDT) is an effective treatment for superficial non-melanoma skin cancers (NMSC) and dysplasia. During PDT light activates the photosensitiser (PpIX), metabolised from a topical pro-drug. A combination of PpIX, light and molecular oxygen results in inflammation and cell death. However, the outcomes of the treatment could be better. Insufficient biosynthesis of PpIX may be one of the causes of incomplete response or recurrence. Measuring surface fluorescence is usually employed as a means of studying PpIX formation. The aim of this work was to develop a device and a method for convenient fluorescence imaging in clinical settings to gather information on PpIX metabolism in healthy skin and NMSC with a view to improving PDT regimes. Methods: A handheld fluorescence camera and a time course imaging method was developed and used in healthy volunteers and patients diagnosed with basal cell carcinoma (BCC) and actinic keratosis (AK). The photosensitiser (precursor) creams used were 5-aminolaevulinic acid (ALA; Ameluz®) and methyl aminolevulinate (MAL; Metvix®). Pain was assessed using a visual analogue score immediately after the PDT. Results: Fluorescence due to PpIX increases over three hours incubation in healthy skin and in lesional BCC and AK. Distribution of PpIX fluorescence varies between the lesion types and between subjects. There was no significant correlation between PpIX fluorescence characteristics and pro-drug, diagnosis or pain experienced. However, there was a clear dependence on body site. Conclusion: The device and the method developed can be used to assess the characteristics of PpIX fluorescence, quantitative analysis and time course. Our findings show that body site influences PpIX fluorescence which we suggest may be due to the difference in skin temperature at different body sites. © 2015 Published by Elsevier B.V.

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