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The value of cysteinyldopa in the follow-up of disseminated malignant melanoma
Linköping University, Faculty of Health Sciences. Linköping University, Department of Biomedicine and Surgery, Clinical Chemistry. Östergötlands Läns Landsting, Centre for Laboratory Medicine, Department of Clinical Chemistry.
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2000 (English)In: Melanoma research, ISSN 0960-8931, Vol. 10, no 4, 363-369 p.Article in journal (Refereed) Published
Abstract [en]

In a series of 92 patients with malignant melanoma, clinical stage III or IV, both 5-S-cysteinyldopa (5SCD) and 6-hydroxy-5-methoxyindole-2-carboxylic acid (6H5MI2C) were measured in urine during chemotherapy. A total of 434 urine specimens were analysed. The sensitivity of 5SCD for the detection of stage III-IV melanoma was 83%, while the corresponding sensitivity of 6H5MI2C was 52%. Fifty per cent of patients with one metastatic site had increased 5SCD excretion, while all patients with four or more metastatic sites had increased excretion. A significant correlation was found between 5SCD decrease and clinical regression (P < 0.001) and between 5SCD increase and clinical progression (P < 0.001). Corresponding correlations were not found for 6H5MI2C. Increments in 5SCD excretion (median 269 ╡mol/mol creatinine) were seen for 83% of the occasions when clinical progression was recorded, and decrements in 5SCD excretion (median 145 ╡mol/mol creatinine) were seen for 85% of the occasions when clinical regression was seen. During clinical 'stable disease' increases in 5SCD excretion were seen in 59% and decreases in 41%. The median value of 5SCD changes for stable disease was 7.0 ╡mol/mol creatinine, indicating a chemical marker stability in many cases. We recommend the use of 5SCD in urine as a valuable, reliable and simple biochemical marker to use in the clinical follow-up of melanoma patients with advanced disease.

Place, publisher, year, edition, pages
2000. Vol. 10, no 4, 363-369 p.
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Medical and Health Sciences
URN: urn:nbn:se:liu:diva-25195DOI: 10.1097/00008390-200008000-00008Local ID: 9634OAI: diva2:245522
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2011-01-14

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Kågedal, BertilÅrstrand, Kerstin
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Faculty of Health SciencesClinical ChemistryDepartment of Clinical Chemistry
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