Prediction of disease outcome in melanoma patients by molecular analysis of paraffin-embedded sentinel lymph nodes

Christine T. Kuo, Dave S.B. Hoon, Hiroya Takeuchi, Roderick Turner, He Jing Wang, Donald L. Morton, Bret Taback

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)


Purpose: A significant number of patients who develop recurrence after a histopathologically negative sentinel lymph node (SLN) biopsy will demonstrate occult metastases on re-evaluation of the SLNs with serial sectioning and immunohistochemistry. Reverse transcriptase polymerase chain reaction (RT-PCR) has been evaluated to improve disease staging and avoid false-negative findings in fresh or frozen-section SLNs. The purpose of this study was to develop a multimarker RT-PCR assay for assessing melanoma patients' archived paraffin-embedded (PE) SLNs. Patients and Methods: Archived PE histopathologically positive (n = 37) and negative (n = 40) SLNs from patients with primary melanoma were analyzed using a semiquantitative multimarker RT-PCR assay. Results: Marker expression in histopathologically positive and negative SLNs were as follows: 89%, 92%, 35%, and 43% (positive) and 40%, 33%, 5%, and 13% (negative) for tyrosinase, melanoma antigen recognized by T cells-1, tyrosinase-related protein-1, and tyrosinase-related protein-2, respectively. Twenty-five percent of histopathologically negative SLN patients were upstaged using at least two markers. Of these, 80% developed a recurrence. Furthermore, at a median follow-up of 55 months, patients with histopathologically negative SLNs who expressed zero or one marker had a significantly improved disease-free (P < .002) and overall (P < .03) survival versus those expressing two or more markers. Conclusion: These findings demonstrate the feasibility of a multimarker RT-PCR assay for evaluating archived PE SLNs. More significantly, identification of molecular risk factors can be detected in histopathologically negative SLNs for distinguishing early-stage melanoma patients with a worse prognosis.

Original languageEnglish
Pages (from-to)3566-3572
Number of pages7
JournalJournal of Clinical Oncology
Issue number19
Publication statusPublished - 2003 Oct 1
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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