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Extranodal Spread is Associated with Recurrence and Poor Survival in Stage III Cutaneous Melanoma Patients

  • Melanomas
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Annals of Surgical Oncology Aims and scope Submit manuscript

Abstract

Background

Inconsistent data suggests extranodal spread (ENS) is an adverse prognostic factor in Stage III melanoma patients but it remains contentious. By rigorously matching cohorts, this study sought to clarify associations with recurrence and survival.

Methods

Melanoma patients with lymph node metastases (AJCC Stage III), with or without ENS, sub-classified on the basis of known (MKP) or unknown primary (MUP), were identified from a single institution prospective database. Of 725 ENS patients identified, 567 were able to be precisely matched 1:1 with a non-ENS cohort. Clinicopathologic factors were analyzed for associations with outcome.

Results

There were 481 MKP and 86 MUP patients in each cohort. ENS, compared to non-ENS, was an independent predictor of worse melanoma specific survival (MSS) (HR = 1.71, 95% CI = 1.39–2.11, P < 0.0001) with median MSS 56.4 versus 175.2 months, P < 0.001; worse disease free survival (DFS) (HR = 1.16, 95%CI = 1.00–1.34, P = 0.044) with median DFS 15.6 versus 21.5 months, P = 0.009; and worse post-recurrence survival (PRS) (HR = 1.66, 95%CI = 1.37–2.02, P < 0.0001) with median PRS 20.1 versus 51.1 months, P < 0.001. ENS was also associated with reduced time to distant recurrence (Distant Disease Free Survival [DDFS]) (HR = 2.00, 95% CI = 1.24–3.24, P = 0.0047), however median time to distant recurrence not reached within the study time period.

Conclusions

ENS represents a significant independent predictor of worse MSS, DFS, PRS and DDFS in Stage III melanoma patients. ENS should be considered in the stratification of patients in adjuvant therapy trials.

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Ackowledgment

The authors thank the various medical and clinical staff at Melanoma Institute Australia, particularly Hazel Burke and John F Thompson, as well as the patients and their families.

Funding

Grant support from the Australian National Health and Medical Research Council and Cancer Institute New South Wales is gratefully acknowledged. RAS is supported by an NHMRC Practitioner Fellowship. Andrew Spillane’s academic position is funded by the Friends of the Mater Hospital Foundation.

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Correspondence to Andrew J. Spillane MD.

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Crookes, T.R., Scolyer, R.A., Lo, S. et al. Extranodal Spread is Associated with Recurrence and Poor Survival in Stage III Cutaneous Melanoma Patients. Ann Surg Oncol 24, 1378–1385 (2017). https://doi.org/10.1245/s10434-016-5723-0

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  • DOI: https://doi.org/10.1245/s10434-016-5723-0

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