| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
ORIGINAL ARTICLES |
From the Department of Surgery, The Netherlands Cancer Institute/Antoni van Leeuwenhoek Hospital (EMN, BT, BCV, OEN, GAMH, BBRK), Amsterdam; and Department of Surgery, University Hospital Rotterdam/Daniel den Hoed Cancer Center (BNvG, AMME), Rotterdam, The Netherlands.
Correspondence: Address correspondence and reprint requests to: E. M. Noorda, MD, Department of Surgery, The Netherlands Cancer Institute/Antoni van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX Amsterdam, The Netherlands; Fax: 31-20-5122554; e-mail: e.noorda{at}nki
| ABSTRACT |
|---|
|
|
|---|
Methods: All 43 patients who had their first ILP for a third or further limb recurrence were selected from our computer database of 451 patients who underwent therapeutic ILP for recurrent extremity melanoma in our centers. Eighteen patients had resectable and 25 had locally unresectable lesions at the time of ILP. The patients had a total of 269 intervals between treatment of their primary melanoma and last recurrence or last follow-up. Median follow-up was 35 months (interquartile range, 1464 months).
Results: The median LRFI decreases over time from primary melanoma to the third or further recurrence for which ILP was performed (P < 0.001). The median LRFI is 4.7 times longer (95% confidence interval [CI], 2.87.9; P < 0.001) after ILP in comparison with the last interval before ILP. Patients with resectable lesions have a median LRFI that is 5.9 times longer (95% CI, 2.713; P < 0.001). In all patients, the number of lesions increases by 22% per recurrence number (95% CI, 10%35%; P = 0.02). At the same recurrence number, patients before ILP have a 2.6-fold higher (95% CI, 1.64.5) mean number of lesions than do patients after ILP (P < 0.001).
Conclusions: ILP lengthens the LRFI and decreases the number of lesions per recurrence significantly in patients with repeatedly recurrent limb melanoma. Therefore, ILP could be a valuable adjunct to excisional surgery for in-transit metastases in these patients whose LRFIs tend to shorten over time.
Key Words: Extremities Local recurrences Melanoma Regional perfusion
| INTRODUCTION |
|---|
|
|
|---|
Isolated limb perfusion (ILP), however, can treat both macroscopic and microscopic disease by delivering a high dose of therapeutic agent(s) to the whole limb.6 Therefore, prophylactic ILP has the potential to stop or slow down the process of ongoing recurrences by eradicating micrometastases present in the limb. ILP provides a complete response in 54% of patients, with a probably lower complete response rate in those with unresectable rather than resectable lesions.5 In a small prospective randomized trial conducted by the Swedish Melanoma Study Group, 69 patients with recurrent extremity melanoma were randomly treated by excision alone or excision plus ILP. Tumor-free survival was increased after ILP from 10 to 17 months, and the limb recurrence rate decreased from 67% to 45%.7 To determine whether ILP in the population of patients with resectable recurrent in-transit lesions may be indicated, the effect of ILP on further recurrences, the number of lesions per recurrence, and the limb recurrence-free interval (LRFI) in patients with frequently recurring limb melanoma was studied.
| PATIENTS AND METHODS |
|---|
|
|
|---|
According to either of these sets of criteria, 18 patients had resectable and 25 patients had unresectable melanoma lesions. The lesions forming the indication for ILP were on the upper arm in 3 patients, on the thigh in 2, on the lower leg in 27, on the foot in 3, on the foot extending up to the lower leg in 5, and widely spread over the lower limb in 3. The stage of disease was classified according to the MD Anderson melanoma staging system, adapted for stage II.10 The median number of previous recurrences was 2 (range, 210) and the median number of lesions forming the indication for ILP was 4 (range, 28). Details about the number and size of the lesions and stage of disease are shown in Table 1. Twenty-five patients underwent ILP for the third recurrence, nine for the fourth, one for the fifth, four for the sixth, two for the seventh, one for the eighth, and one for the eleventh. The indication for ILP was based on unresectability or resectable disease that was believed to pose problems for future locoregional disease control.
|
ILP with melphalan is usually carried out with normothermia (37°C to 38°C); ILP with tumor necrosis factor-
(TNF
) and melphalan is performed under mild hyperthermia (38°C to 40°C). The circulating time of melphalan is 60 minutes. Nineteen patients were treated with melphalan alone, 19 with melphalan and TNF
, and 5 with melphalan, TNF
, and interferon-
(IFN
). In these latter patients, 0.2 mg IFN
was injected subcutaneously for 2 days before surgery. The same dose was given intraoperatively in the isolated circuit. One patient was treated with a sequential ILP, in which ILP with hyperthermia (42°C to 43°C) and no drugs was followed by ILP with melphalan 1 week later under normothermic conditions.12
Regional toxicity after ILP was graded according to Wieberdink,13 and tumor response was defined according to the standard WHO criteria.14 The median follow-up after ILP was 35 months (interquartile range, 1464 months).
LRFIs were computed from the time of complete remission (CR) after ILP to the next recurrence or the end of follow-up. If partial remission (PR), no change (NC), or progressive disease occurred after ILP, the subsequent interval was scored as 0 months.
Statistical analysis for the LRFI was performed with an accelerated failure time analysis with frailty per patient.15,16 A Weibull survival distribution for the within-patient interval lengths (untransformed) was used in conjunction with a gamma distribution for the frailties. To check the sensitivity of the results, a second analysis was performed based on a proportional hazard analysis of the interval-length data. Correlation between intervals within the same patients was accounted for by the method of Wei et al.17 For analysis of the number of lesions per interval, the method of General Estimating Equations (GEE),18 based on an overdispersed Poisson distribution, was used because of the obvious nonnormality of the number of lesions and the possibility that the numbers of lesions in different intervals for the same patients are correlated. The number of lesions was the dependent variable, and the recurrence number and the status of the interval with respect to perfusion (before or after) were used as independent variables.
Several models were used: an arbitrary or a linear relation between ln (number of lesions) and recurrence number and including or excluding interaction between recurrence number and interval status.
| RESULTS |
|---|
|
|
|---|
|
|
|
Number of Lesions
The median number of lesions forming the indication for ILP was four (interquartile range, 28) and significantly larger than the number of lesions at the first recurrence after ILP, which was one (interquartile range, 13; P = 0.006). Overall, at the same recurrence number, patients before ILP have a 2.6-fold higher (95% CI, 1.64.5) mean number of lesions than do patients after ILP (P < 0.001). The number of lesions increases with the recurrence number, and this increase is estimated to be 22% per recurrence (95% CI, 10%35%; P = 0.02). This is similar before and after ILP, with a 23% increase in number of lesions per recurrence number before and 16% increase after ILP (P = 0.55). In Figure 3, the relation between the mean number of lesions and recurrence number is shown before and after ILP. It shows that the mean number of lesions increases with the recurrences number before as well as after ILP and that the number of lesions for patients after ILP is lower than for patients before ILP. For example, at the fourth recurrence, the mean number of lesions after ILP is 0.6 (68% CI, 0.32), in comparison with a mean number of 4 (68% CI, 3.54.6) if lesions had only been excised at the third recurrence.
|
Management of Further Recurrences
In two patients a transfemoral amputation of the lower limb was done for intractable recurrences and failure of local radiotherapy with hyperthermia at 1 year and 2 years after ILP, respectively. The limb salvage rate was 93%. The management of recurrences and persisting disease after ILP is indicated in Table 3.
|
Patients with Resectable Lesions at the Time of ILP
Tumor response
One patient had more than nine LRFIs. Because this caused estimation problems, we analyzed only the first nine intervals. Eleven of the 18 patients with resectable lesions developed a CR (61%; CI, 36%86%) after ILP. Four patients had no evaluable tumor response because the lesions were excised at ILP. One other patient had a PR and underwent excision of lesions at the time of maximal response. Two patients had lesions that progressed rapidly after ILP and were treated with local radiotherapy combined with hyperthermia. Five of the 11 patients with CR had a recurrence (46%; 95% CI, 10%81%) after a median of 5 months (interquartile range, 415 months). The mean duration of CR was 25 months (95% CI, 481 months).
Limb recurrence-free interval
Figure 4 shows the estimated median LRFIs with their 95% confidence intervals. The median LRFI decreases when the number of times of recurrence increases (P = 0.05). Also, the intervals for patients after ILP in this subgroup are longer than for patients before ILP at the same recurrence number. If, for instance, ILP is performed at the third recurrence, the subsequent median LRFI is 30 months (95% CI, 1275 months), compared with 5 months (95% CI, 215 months) for those who have not undergone ILP at the same recurrence number (Fig. 4). In Figure 5 the ratios of median intervals after versus before ILP are given. Assuming a constant ratio, the median LRFI for patients with resectable lesions after ILP is 5.9 times longer (95% CI, 2.713; P < 0.0001) than for patients at the same recurrence number before ILP.
|
|
| DISCUSSION |
|---|
|
|
|---|
This study showed a significant increase in LRFI after ILP in comparison with excision only. For the entire population, the LRFI was five times longer and for the patients with resectable lesions this was even six times longer at a given recurrence number. For all patients, at the third recurrence, ILP led to a median LRFI of 23 months, compared with 3 months for patients who underwent excision only at that time. This LRFI is longer than the 919 months that is known from other reports after ILP with melphalan, with or without TNF
.7,9,2326 A single ILP stopped the process of recurring disease in one-third of our patients who were rendered locoregionally tumor-free until the end of follow-up, at a median of 3 years after ILP. These results seem considerably better than results of excision alone for in-transit melanoma, after which 15% to 17% of the patients become long-term free of disease.7,24
Apart from the time between recurrences, the number of lesions per recurrence was also shown to decrease after ILP. These findings strongly suggest that ILP influences the outgrowth of micrometastases in the affected limb. This is supported by the results of a small prospective randomized trial conducted by the Swedish Melanoma Study Group, in which 69 patients with recurrent extremity melanoma were randomly treated by excision or excision plus ILP. The tumor-free survival was increased after ILP from 10 to 17 months, and the limb recurrence rate was decreased from 67% to 45% after a median follow-up of 5 years.7 In a large international randomized trial comparing adjuvant ILP to the excision of primary extremity melanoma with excision alone, a trend for a longer disease-free interval was also seen. A reduction in the incidence of both in-transit metastases (3% vs. 7%) and regional lymph node metastases (13% vs. 17%) in the patients that underwent ILP was observed.6
Another study of the management of extremity recurrences after CR to ILP in 28 patients demonstrated an increased median duration of CR of 15 months after repeated ILP, in comparison with 6 months after excision alone.24
Single ILP with melphalan results in a CR in approximately 54% of the patients.5 Our CR rate of 63% compares favorably with this figure, with a similar rate of recurrence in about half of these patients. Waiting for a third or further recurrence does not seem to diminish the chance of a CR after ILP. This is in contrast to previous studies in which the tumor load on the extremity, which increases over time in these patients, was the strongest negative prognostic factor for tumor response.2628 However, we confirmed the other finding of these studies, that a high tumor load is a negative predictor of recurrence-free survival, with a larger gain in limb recurrence-free interval after ILP performed at the third recurrence than at a later stage. A higher complete response rate of 72% and 73% has been reported after ILP with TNF
and melphalan, compared with 58% and 52% after ILP with melphalan alone in these studies.9,23 In the present study, results of these two regimens were not analyzed separately because of the small size of the groups and the fact that the effect on micrometastases is mainly due to the melphalan, as expressed by a similar limb disease-free survival after both regimens.
The main disadvantages of ILP lie in the involved costs, risk of acute regional toxicity, and long-term morbidity. After single ILP with melphalan, regional toxicity is mild in 85% of the patients, with slight edema and erythema that resolves completely within 2 weeks.29 More severe acute skin and soft-tissue reactions with blistering occur in approximately 15% of the patients, but a compartmental syndrome necessitating fasciotomy or amputation occurs in a maximum of 5% of the patients. Clinically observed long-term morbidity after iliac ILP with melphalan consists mostly of restricted function of the ankle and edema. Significant edema is reported in 28% of patients,28 and although an objective restricted function of the ankle has been noted in 25% to 40% of the patients,30,31 only 8% of these patients complained of ankle stiffness.30 In elderly patients, the same efficacy, toxicity, and morbidity have been observed after ILP.22 The risk of the aforementioned downsides of ILP should be weighed against multiple surgical excisions or sessions of CO2 laser ablation, which are likely to be necessary with increasing frequency for a growing number of lesions.
Some argue that systemic treatment would benefit these patients with localized metastatic disease because they are at high risk of distant metastatic disease.2 However, only small groups of patients undergoing systemic treatment for localized inoperable disease have been described. In a phase II randomized trial, biochemotherapy (consisting of chemotherapy combined with IFNa and IL-2) resulted in a 60% response rate and chemotherapy resulted in a 45% response rate in the small proportion of patients with AJCC stage III localized metastatic disease (in-transit or lymph node metastases).19 This was achieved at the cost of systemic toxicity, such as fatigue, anorexia, altered sensorium, and hypotension, in a considerable number of patients, mostly in the combined treatment group.
In a nonrandomized analysis of 631 patients, high-dose IL-2, with the addition of chemotherapy or IFN
or both, resulted in a 43% overall response rate among patients with cutaneous metastases without lymph node involvement, with a 5-year survival rate of 27%.20 Dacarbazine as a single agent results in a mere 10%20% overall response rate and also has no proven benefit in terms of survival.21 The value of systemic treatment in localized metastatic melanoma is unclear, and local treatment options should be applied until distant metastases appear.
In conclusion, controlling the locoregional disease process in patients with frequently recurring limb melanoma is of great importance because the prognosis for these patients is reasonable. ILP slows down and sometimes stops this process, with a markedly increased LRFI in comparison with excision alone and a diminished tumor load at the next recurrence. Although a randomized trial would be warranted to provide definitive recommendations, ILP should be considered for patients with a third episode of limb melanoma recurrence (Fig. 6).
|
| FOOTNOTES |
|---|
Received for publication April 29, 2003. Accepted for publication January 28, 2004.
| REFERENCES |
|---|
|
|
|---|
This article has been cited by other articles:
![]() |
Y. Yoshimoto, C. K. Augustine, J. S. Yoo, P. A. Zipfel, M. A. Selim, S. K. Pruitt, H. S. Friedman, F. Ali-Osman, and D. S. Tyler Defining regional infusion treatment strategies for extremity melanoma: comparative analysis of melphalan and temozolomide as regional chemotherapeutic agents Mol. Cancer Ther., May 1, 2007; 6(5): 1492 - 1500. [Abstract] [Full Text] [PDF] |
||||
![]() |
D. Tyler Editorial: Where are We going with Regional Therapy for Melanoma? Ann. Surg. Oncol., May 1, 2004; 11(5): 455 - 457. [Full Text] [PDF] |
||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |