Regional toxicity after isolated limb perfusion with melphalan and tumour necrosis factor- alpha versus toxicity after melphalan alone

Tumor-Penetrable Nitric Oxide-Releasing Nanoparticles Potentiate Local Antimelanoma Therapy

Although nitric oxide (NO) has been emerging as a novel local anticancer agent because of its potent cytotoxic effects and lack of off-target side effects, its clinical applications remain a challenge because of the short effective diffusion distance of NO that limits its anticancer activity. In this study, we synthesized albumin-coated poly(lactic-co-glycolic acid) (PLGA)-conjugated linear polyethylenimine diazeniumdiolate (LP/NO) nanoparticles (Alb-PLP/NO NPs) that possess tumor-penetrating and NO-releasing properties for an effective local treatment of melanoma. Sufficient NO-loading and prolonged NO-releasing characteristics of Alb-PLP/NO NPs were acquired through PLGA-conjugated LP/NO copolymer (PLP/NO) synthesis, followed by nanoparticle fabrication. In addition, tumor penetration ability was rendered by the electrostatic adsorption of the albumin on the surface of the nanoparticles. The Alb-PLP/NO NPs showed enhanced intracellular NO delivery efficiency and cytotoxicity to B16F10 murine melanoma cells. In B16F10-tumor-bearing mice, the Alb-PLP/NO NPs showed improved extracellular matrix penetration and spatial distribution in the tumor tissue after intratumoral injection, resulting in enhanced antitumor activity. Taken together, the results suggest that Alb-PLP/NO NPs represent a promising new modality for the local treatment of melanoma.

Isolated limb perfusion for unresectable extremity cutaneous squamous cell carcinoma; an effective limb saving strategy

Background

A small minority of patients present with locally advanced cutaneous Squamous Cell Carcinoma (cSCC). The aim of this study was to evaluate the effectiveness of Tumour necrosis factor α (TNF) and melphalan based isolated limb perfusion (TM-ILP) as a limb saving strategy for locally advanced extremity cSCC.

Methods

A retrospective search from prospectively maintained databases, at two tertiary referral centers, was performed to identify patients treated with TM-ILP for locally advanced cSSC of an extremity between 2000 and 2015.

Results

A total of 30 patients treated with TM-ILP for cSCC were identified, with a median age of 71 years (36–92) and 50% female. Response could not be evaluated in 3 patients. After a median follow up of 25 months, the overall response rate was 81% (n = 22), with 16 patients having a complete response (CR, 59%). A total of 7 patients developed local recurrence, with a median time to recurrence of 9 months (Interquartile Range 7–10). Progressive disease was observed in 5 patients (19%). Limb salvage rate was 80%. The overall 2-year survival was 67%.

Conclusions

TM-ILP should be considered as an option in patients with locally advanced cSCC in specialised centers, resulting in a high limb salvage rate.

Monitoring system for isolated limb perfusion based on a portable gamma camera

Background: The treatment of malignant melanoma or sarcomas on a limb using extremity perfusion with tumour necrosis factor (TNF-α) and melphalan can result in a high degree of systemic toxicity if there is any leakage from the isolated blood territory of the limb into the systemic vascular territory. Leakage is currently controlled by using radiotracers and heavy external probes in a procedure that requires continuous manual calculations. The aim of this work was to develop a light, easily transportable system to monitor limb perfusion leakage by controlling systemic blood pool radioactivity with a portable gamma camera adapted for intraoperative use as an external probe, and to initiate its application in the treatment of MM patients. Methods: A special collimator was built for maximal sensitivity. Software for acquisition and data processing in real time was developed. After testing the adequacy of the system, it was used to monitor limb perfusion leakage in 16 patients with malignant melanoma to be treated with perfusion of TNF-α and melphalan. Results: The field of view of the detector system was 13.8 cm, which is appropriate for the monitoring, since the area to be controlled was the precordial zone. The sensitivity of the system was 257 cps/MBq. When the percentage of leakage reaches 10% the associated absolute error is ± 1%. After a mean follow-up period of 12 months, no patients have shown any significant or lasting side-effects. Partial or complete remission of lesions was seen in 9 out of 16 patients (56%) after HILP with TNF-α and melphalan. Conclusion: The detector system together with specially developed software provides a suitable automatic continuous monitoring system of any leakage that may occur during limb perfusion. This technique has been successfully implemented in patients for whom perfusion with TNF-α and melphalan has been indicated.

Lower limb function and quality of life after ILP for soft-tissue sarcoma

BACKGROUND

Isolated limb perfusion with TNF-alpha and melphalan (TM-ILP) in combination with complete tumor resection is an effective treatment option for non-resectable soft-tissue sarcoma of the extremities, with limb salvage rates greater than 80%. The aim of this study was to assess quality of life (QoL) after TM-ILP, also with regard to long-term survival.

METHODS

We retrospectively examined 27 patients who had primarily non-resectable soft-tissue sarcoma of the leg and who had undergone TM-ILP and complete tumor resection (with limb-sparing intent) during their follow-up examinations using the Quality of Life Questionnaire (QLQ-C30) and the German Short Musculoskeletal Function Assessment (SMFA-D). The results from the QLQ-C30 were compared to the reference values for the general population, to the "all cancer patients" reference values (both reference values published by the European Organization for Research and Treatment of Cancer (EORTC)), and to the reference values of a historical amputation group from the literature. The results of the SMFA were compared with those from a reference group of healthy individuals.

RESULTS

Surprisingly, we found that the global health status/QoL in the TM-ILP group was not significantly different from the general population or from patients with amputation, but it was higher than that of patients with cancer in general. Concerning the SMFA, we did find functional impairments in patients after TM-ILP compared to the reference group. With regard to long-term survival, we found no time-dependent deterioration in QoL for longer time intervals after treatment.

CONCLUSIONS

These results support the use of TM-ILP in limb-sparing multimodal therapy settings from a quality-of-life perspective, but they also encourage further research on this matter.

Diagnosis and treatment of in-transit melanoma metastases

In transit metastases (ITM) from extremity or trunk melanomas are subcutaneous or cutaneous lymphatic deposits of melanoma cells, distant from the primary site but not reaching the draining nodal basin. Superficial ITM metastases develop in 5-10% of melanoma patients and are thought to be caused by cells spreading along lymphatics; ITM appear biologically different from distant cutaneous metastases, these probably due to a haematogenous dissemination. The diagnosis is usually clinical and by patients, but patients need to be adequately educated in the recognition of this clinical situation. Ultrasound or more sophisticated instrumental devices may be required if the disease develops more deeply in the soft tissues. According to AJCC 2009 staging classification, ITM are included in stages IIIb and IIIc, which are considered local advanced disease with quite poor 5-year survival rates and outcomes of 24-54% at 5 years.² Loco-regional recurrence is in fact an important risk factor for distant metastatic disease, either synchronous or metachronous. Therapy for this pattern of recurrence is less standardised then in most other clinical situations and options vary based on the volume and site of the disease. Definitive surgical resection remains the preferred therapeutic approach. However, when surgery cannot be performed with a reasonable cosmetic and functional outcome, other options must be utilized.^3-6 Treatment options are classified as local, regional or systemic. The choice of therapy depends on the number of lesions, their anatomic location, whether or not these are dermal or subcutaneous, the size and the presence or absence of extra-regional disease.

Isolated limb perfusion as a treatment option for rare types of tumours

BACKGROUND

Isolated limb perfusion (ILP) is an established and effective treatment for advanced melanoma and soft tissue sarcomas of the extremities with a high overall response rate. The aim of this study was to describe our experience of ILP for more rare types of tumours.

METHODS

Patients with Merkel cell carcinoma (MCC) (n = 4), squamous cell carcinoma (SCC) (n = 2), B-cell lymphoma (n = 1), desmoid tumours (n = 3), pigmented villonodular synovitis (PVNS) (n = 1) and giant cell tumour (n = 1) were treated with ILP and analysed retrospectively.

RESULTS

The four patients with in-transit MCC had three complete responses (CR) and one partial response (PR); the two patients with SCC had one CR and one stable disease (SD); the patients with desmoid tumours had two PR and one SD. A CR was also observed for the patient with a giant cell tumour, but the patient with PVNS had a SD. The patient with cutaneous metastases of B-cell lymphoma showed a CR, however with rapid systemic progression. Local toxicity according to Wieberdink was grade II in 10 patients (83%) and grade III in two patients (17%).

CONCLUSIONS

These results show that ILP can be used as a treatment option also for more rare disease entities when other treatments have failed.

Anesthesia management of patients undergoing hyperthermic isolated limb perfusion with melphalan for melanoma treatment: an analysis of 17 cases

Background

Hyperthermic isolated limb perfusion (HILP) is used for patients with intractable or extensive in-transit metastatic melanoma of the limb to deliver high concentrations of cytotoxic agents to the affected limb and offers a treatment option in a disease stage with a poor prognosis when no treatment is given.

Methods

In a retrospective chart review of 17 cases, we studied the anesthetic and hemodynamic changes during HILP and its management.

Results

HILP was well tolerated except in one case that is described herein. We present summary data of all cases undergoing upper and lower limb perfusion, discuss our current clinical practice of preoperative, perioperative and intraoperative patient care including the management of HILP circuit.

Conclusion

HILP is a challenging procedure, and requires a team effort including the surgical team, anesthesia care providers, perfusionists and nurses. Intraoperatively, invasive hemodynamic and metabolic monitoring is indispensable to manage significant hemodynamic and metabolic changes due to fluid shifts and release of cytokines.

[Tumor necrosis factor α and melfalan-based hyperthermic isolated limb perfusion in locally advanced extremity soft tissue sarcomas and melanomas]

INTRODUCTION

The aim of the study is to evaluate the limb salvage rate achieved by treating locally advanced extremity sarcoma and melanoma by hyperthermic isolated limb perfusion with melphalan and TNF-α (ILP-MT).

MATERIAL AND METHODS

A retrospective study was conducted on patients suffering from locally advanced soft tissue sarcoma and melanoma of the limb and treated by means of ILP-MT between November 2001 and February 2010. The response rate, toxicity, complications, disease free intervals, overall survival and limb salvage rate were evaluated.

RESULTS

A total of 30 patients (19 females and 11 males) with a median age of 60 years (14-82) were treated by this technique. The overall response rate was 93.4% (complete, 46.7%; partial 46.7%); the mean follow-up was 23 months. The median duration of response was 5 months (0-62), The median overall survival was 13.5 months (range 1 - 62). Limb salvage rate was 86.7%. Eleven patients are currently alive (5 without disease, 2 with residual disease on treatment, 2 with local progression and 2 with systemic progression).

CONCLUSION

With the use of ILP-MT we have avoided the amputation of 26 limbs affected by locally advanced sarcoma or melanoma. ILP-MT is feasible and safe in a multidisciplinary environment.

Isolated limb perfusion for melanoma in-transit metastases: developments in recent years and the role of tumor necrosis factor alpha

PURPOSE OF REVIEW

The treatment of in-transit metastasis of melanoma remains challenging and is essentially dictated by the biological behavior of melanoma. When lesions are large or numerous, isolated limb perfusion (ILP) is an attractive treatment modality. In this review an overview of literature on treatment options of melanoma in-transit metastases will be discussed.

RECENT FINDINGS

Most recent studies report on tumor necrosis factor (TNF) and melphalan based ILP (TM-ILP) series or mixed series of TM-ILP and melphalan only based ILP (M-ILP). After TM-ILP complete response rates of 70% (range 44-90%) have been reported, while for M-ILP this is lower with complete response rates of 54% (range 40-76%). The only randomized trial comparing TM-ILP and M-ILP revealed no clear benefit of TNF at 3 months, but improved outcome at 6 months and in patients with bulky disease. Reports on isolated limb infusion (ILI) with melphalan and actinimycin D indicate lower response rates, but similar local control rates as M-ILP at lower cost.

SUMMARY

ILP is an attractive treatment option in melanoma patients with multiple in-transit metastases. In our opinion TM-ILP is superior to M-ILP as it achieves higher response rates, especially in patients with bulky disease. When lesions are small and in the distal two-thirds of the leg only, ILI is a valuable alternative.

Long-term results of melphalan-based isolated limb perfusion with or without low-dose TNF for in-transit melanoma metastases

BACKGROUND

The aims of the study were: (1) to determine toxicity, response rate, local-regional control, and survival in the entire population of the perfused patients; (2) to compare toxicity, response, and survival among patients who underwent melphalan-based perfusion with or without low-dose tumor necrosis factor (TNF); and (3) to identify factors that predict a complete response and survival.

MATERIALS AND METHODS

A total of 53 patients with extensive in-transit metastases (47%) underwent perfusion with melphalan, and 59 (53%) also received low-dose TNF.

RESULTS

No difference was observed between the 2 drug regimens for what concerns local toxicity (P = 1.0). The tumor complete response rate was higher in patients treated with TNF (60.3% versus 41.5%, P = .036), in particular in the case of locally advanced tumors (66.7% versus 30%, P = .049). The presence of lymph node metastases had a negative influence on the tumor response rate (P = .003). Median time to local progression and survival were 19.6 and 34.5 months, respectively. Long-term complete response was achieved in 68% of the patients with initial CR (39 of 57 patients). The tumor response after perfusion was the only prognostic factor for local control and survival (P < .0001 and P = .002, respectively).

CONCLUSIONS

In the case of locally advanced disease, the addition of low-dose TNF to melphalan-based isolated limb perfusion appears safe and particularly useful. The presence of lymph node metastases is associated with decreased response rates. A sustained complete response was obtained in about one-third of the patients.

Isolated limb perfusion for malignant melanoma: systematic review on effectiveness and safety

BACKGROUND

Isolated limb perfusion (ILP) involves the administration of chemotherapy drugs directly into a limb involved by locoregional metastases. Unresectable locally advanced melanoma of the limbs represents one of the clinical settings in which ILP has demonstrated benefits.

METHODS

A systematic review of the literature on ILP for patients with unresectable locally advanced melanoma of the limbs was conducted. MEDLINE, EMBASE, and Cochrane database searches were conducted to identify studies fulfilling the following inclusion criteria: hyper- or normothermic ILP with melphalan with or without tumor necrosis factor (TNF) or other drugs providing valid data on clinical response, survival, or toxicity. To allocate levels of evidence and grades of recommendation the Scottish Intercollegiate Guidelines Network system was used.

RESULTS

Twenty-two studies including 2,018 ILPs were selected with a clear predominance of observational studies (90.90%) against experimental studies (9.10%). The median complete response rate to ILP was of 58.20%, with a median overall response rate of 90.35%. ILP with melphalan yielded a median complete response rate of 46.50%, against a 68.90% median complete response rate for melphalan plus TNF ILP. The median 5-year overall-survival rate was 36.50%, with a median overall survival interval of 36.70 months. The Wieberdink IV and V regional toxicity rates were 2.00% and 0.65%, respectively.

CONCLUSIONS

ILP is effective in achieving clinical responses in patients with unresectable locally advanced melanoma of the limbs. The disease-free and overall survival rates provided by ILP are acceptable. ILP is safe, with a low incidence of severe regional and systemic toxicity.

Common peroneal nerve palsy following TNF-based isolated limb perfusion for irresectable extremity desmoid tumor

Hyperthermic isolated limb perfusion (ILP) (2 mg, TNF-alpha and 100mg, melphalan) was performed for an irresectable right thigh desmoid tumor with calf extension in a 49-year-old man. The patient had a history of four resections since the age of 19 years. Local ILP toxicity appeared with extensive edema and common peroneal neurologic impairment including paresis that remained severe 10 months later. One of the most troublesome side effects of perfusion is peripheral nerve damage, which has been reported at a rate of between 1 and 48% of perfused patients. ILP is an effective treatment in recurrence situations or where resection threatens loss of function; it, however, requires administration in specialized centers, progress in standardization and close monitoring to avoid locoregional toxicity, the mechanisms of which merit further investigation. Emergency compartmental pressure measurement may indicate fasciotomy, can be of great interest.

Predictive factors of regional toxicity and serum creatine phosphokinase levels after isolated limb infusion for melanoma: a multi-institutional analysis

BACKGROUND

Isolated limb infusion (ILI) is a minimally invasive technique delivering regional chemotherapy to treat in-transit extremity melanoma. Determining perioperative factors that could predict toxicity is important to optimize strategies to improve clinical outcomes after regional chemotherapy in melanoma.

METHODS

Perioperative factors from 171 ILI patients performed at eight centers from 2001 to 2008 were reviewed. The Wieberdink limb toxicity scale and creatine phosphokinase (CK) levels were used to measure toxicity. Logistic regression analysis was used to estimate the association between toxicity and perioperative parameters.

RESULTS

Mild (grades I-II) and severe (grades >or=III) limb toxicity developed in 68% and 32% of patients, respectively. Melphalan adjusted for ideal body weight (aIBW) and papaverine were used in 47% and 63% of patients, respectively. Median peak CK for all patients was 563 U/l, and median peak occurred at postoperative day 4. On univariate analysis, papaverine and high CK levels (>563 U/l) were significantly associated with higher toxicity. On the contrary, aIBW was significantly associated with a lower risk of severe toxicity. Perfusate blood gas at 30 min [pH, PaO(2), and base excess (BE) ], limb temperature, and ischemia time were not predictive of limb toxicity. On multivariate analysis, severe toxicity was associated with female sex (P = 0.01), papaverine (P = 0.01), and high peak CK levels (P < 0.01). Independent predictors of high CK levels included younger age, unadjusted melphalan dose, and low PaO(2) at 30 min.

CONCLUSIONS

ILI can be performed with an acceptable morbidity. Papaverine use, female gender, and high peak CK were associated with higher limb toxicity. CK levels can be diminished significantly with aIBW.

Isolated limb perfusion with TNF-alpha and melphalan in locally advanced soft tissue sarcomas of the extremities

Limb-sparing surgery has become all the more important in soft tissue sarcoma (STS) of the extremities since we learned that amputation does not improve survival of these patients. In bulky tumours, however, preoperative strategies to reduce tumour size are then required. Isolated limb perfusion (ILP) with tumour necrosis factor (TNF) has been developed as a biochemotherapeutic therapy to act both on the tumour-associated vasculature and on the tumour itself. It has shown to be a very potent treatment modality, as in early reports response rates were around 80%. Limb salvage could then be achieved in a quite similar percentage. Many confirmatory studies have been performed since, with consistent results even in patients with multiple tumours, after extensive radiotherapy or with metastatic disease, all at the cost of very limited toxicity. This chapter gives an overview of the ILP studies performed in patients with soft tissue limb sarcoma, discusses the mechanism of TNF-mediated vasculotoxic effects on tumour vasculature, and places TNF-based ILP in the multimodality treatment of these patients with extensive STS of the extremities.

Toxicities associated with hyperthermic isolated limb perfusion and isolated limb infusion in the treatment of melanoma and sarcoma

Hyperthermic isolated limb perfusion (HILP) and isolated limb infusion (ILI) may play a significant role in the treatment of patients with recurrent or in transit extremity melanoma or sarcoma that is unresectable. These procedures may be indicated when patients are otherwise faced with the possibility of a debilitating amputation. Not entirely benign treatment modalities, HILP and ILI can be associated with regional and systemic toxicities. We conducted a literature search of published studies using HILP and ILI for the treatment of extremity sarcomas and melanomas, and associated toxicities was performed. The regional toxicities of HILP and ILI are similar. The most common toxicities reported are mild to moderate. However, when severe regional toxicity occurs, albeit infrequently (<5%), fasciotomies or even amputation may be necessary. Some studies have showed a relationship between acute regional toxicities and long term regional morbidity. Systemic toxicity appears to be more frequent when TNF-alpha is used in combination with other drugs during HILP, however the use of TNF-alpha in the United States is limited to trials. Although regional toxicities are similar, systemic toxicity of ILI is minimal compared to HILP. ILI is easier to repeat, technically less complex, and may be more acceptable in infirmed patients. Long term morbidity and outcomes for ILI are still being evaluated. Both of these techniques may be suitable options in patients with unresectable advanced or recurrent, or in transit extremity melanoma or sarcoma.

Therapy for Unresectable Recurrent and In-Transit Extremity Melanoma

Background

Unresectable recurrent and in-transit extremity melanoma presents a dilemma for the treating physician. While the disease is confined to the involved limb, the survival mimics that of multiple nodal metastases, with a 10-year survival rate of approximately 40%. This represents late-stage disease for which curative treatment options are limited.

Methods

To review the current treatment strategies for stage IIIB (N2c) in-transit and recurrent melanoma focusing on the options for unresectable disease, MEDLINE was searched for studies of known and experimental treatments for in-transit and recurrent extremity melanoma. Further results were obtained after review of the initial citations.

Results

For unresectable recurrences and in-transit metastases, therapies are limited to palliative (radiation), local (intratumoral injection, laser ablation and electroporation), regional (isolated limb perfusion/infusion), and systemic (chemotherapy) when local or regional techniques are not feasible.

Conclusions

In this patient population, intratumoral techniques have a limited role with current treatment regimens, but with the development of new drugs, these techniques may have more utility. If not contraindicated, regional techniques provide the greatest control and have minimal operative morbidity. Until new regimens are available, systemic therapy continues to be associated with considerable toxicity and only marginal response rates.

Isolated limb perfusion with melphalan and TNF-alpha in the treatment of extremity sarcoma

Isolated limb perfusion (ILP) with chemotherapy alone has uniformly failed in the treatment of irresectable extremity soft tissue sarcomas. The addition of tumor necrosis factor-alpha (TNF-α) to this treatment approach contributed to a major step forward in the treatment of locally advanced extremity soft tissue sarcoma (STS). High response rates and limb salvage rates have been reported in multicenter trials, which combined ILP with TNF-α plus melphalan, which resulted in the approval of TNF-α for this indication in Europe in 1998. Subsequently a series of confirmatory single institution reports on the efficacy of the procedure have now been published. TNF-α has an early and a late effect; it enhances tumor-selective drug uptake during the perfusion and plays an essential role in the subsequent selective destruction of the tumor vasculature. These effects result in a high response rate in high-grade soft tissue sarcomas. This induction therapy thus allows for resection of tumor remnants some 3 months after ILP and thus avoidance of limb amputation. TNF-α-based ILP is a well-established treatment to avoid amputations. It represents an important example of tumor vasculatory-modulating combination therapy and should be offered in large volume tertiary referral centers.

Rémission complète persistante d’une tumeur de Merkel avec métastases satellites après traitement par chimiothérapie locorégionale de type membre perfusé isolé

BACKGROUND

Primitive cutaneous neuroendocrine carcinoma or Merkel cell carcinoma is a rare tumor. It may be large since diagnosis is frequently delayed. The usual treatment is extensive surgical removal and radiotherapy.

PATIENTS AND METHODS

A 69-year-old woman presented with a large Merkel cell carcinoma of the right leg. MRI showed a tumor invading the deep layers together with several satellite lesions. There was no regional nodal or visceral metastasis. Regional chemotherapy involving isolated limb perfusion with melphalan was performed in order to avoid amputation. Complete response was achieved a few months later and continues 5 and a half years later with minor sequelae comprising cutaneous sclerosis, pigmentation and mild ankle stiffness.

DISCUSSION

Only five cases of Merkel cell carcinoma treated with isolated limb perfusion are reported in the literature: four of these involved local relapse and one was a primary tumor with regional lymph node involvement. Only one patient was still in complete remission 18 months after treatment. Isolated limb perfusion chemotherapy could thus be indicated in the treatment of advanced Merkel cell carcinoma of a limb in the absence of bone or regional lymph node involvement.

Isolated limb perfusion in regional melanoma

Adjuvant perfusion to excision of a primary melanoma cannot be recommended because of its limited effect. In patients who have frequently recur-ring resectable locoregional melanoma, perfusion may provide valuable loco-regional disease control by decreasing the number of recurrences and lesions per recurrence. Randomized studies are needed to further establish the role of perfusion as an adjuvant treatment for resectable recurrences of melanoma. Unresectable limb melanoma is the primary indication for perfusion. Better response rates tend to be seen when TNF-a is used in patients who have a high tumor load. Repeat perfusion is feasible, resulting in response rates similar to those of a first perfusion for locoregional melanoma. Older age itself is not a contraindication for perfusion. The long-term health-related quality of life of survivors of melanoma who underwent treatment with perfusion is comparable to that of their healthy peers in the general Dutch population.

Technology insight: Utility of TNF-alpha-based isolated limb perfusion to avoid amputation of irresectable tumors of the extremities

Isolated limb perfusion (ILP) with melphalan is effective in the treatment of small multiple melanoma intransit metastases and is utilized widely for this indication. The treatment is much less effective against bulky melanoma metastases and has uniformly failed in the treatment of irresectable extremity soft tissue sarcomas. The addition of tumor-necrosis factor-alpha (TNF-alpha) to this treatment approach has changed the situation dramatically. High response rates and limb-salvage rates have been reported in multicenter trials that combined ILP with TNF-alpha plus melphalan; these trials resulted in the approval of TNF-alpha for bulky melanoma metastases and soft tissue sarcomas in Europe in 1998. Subsequently, many doctors working in European centers have been trained, and a series of confirmatory reports from single institutions have now been published regarding the efficacy of the procedure. TNF-alpha has an early and a late effect; it enhances tumor-selective drug uptake during the perfusion, and plays an essential role in the subsequent selective destruction of the tumor vasculature. These effects result in a high response rate in bulky tumors, soft tissue sarcomas, bulky melanomas, and various other tumor types. This induction therapy therefore allows tumor remnants to be resected some 3 months after ILP thus avoiding limb amputation. TNF-alpha-based ILP is a well-established treatment that aims to avoid amputations regardless of the tumor size and type. It represents an important example of combination therapy that modulates the tumor vasculature and should be offered in high-volume tertiary referral centers.

Isolated limb perfusion for melanoma patients—a review of its indications and the role of tumour necrosis factor-α

AIMS

The treatment of melanoma in-transit metastases (IT-mets) can vary widely and is dependant on the size and the number of the lesions. When multiple, large lesions exist, isolated limb perfusion (ILP) has established itself as an attractive treatment option with high response rates.

METHODS

Review on the various methods of treatment of melanoma in-transit metastases, with a focus on isolated limb perfusion. A Medline based literature search was performed for articles relating to this topic. Additional original papers were obtained from citations in those identified by the initial search. Indications and results are discussed and the extra value of tumour necrosis factor (TNF) is evaluated.

RESULTS

ILP with Melphalan results in complete response rates of 40-82% and showed to be 54% in a large retrospective meta-analysis. The addition of TNF can improve these completes response rates (59-85%) and although no data from randomized controlled trials are available, it seems of particular value in large, bulky lesions or in patients with recurrent disease after previous ILP.

CONCLUSIONS

TNF-based ILP has earned a permanent place in the treatment of patients with melanoma IT-mets. In patients with a high tumour burden, TNF-based ILP is the most efficacious procedure to obtain local control and achieve limb salvage.

TNF dose reduction in isolated limb perfusion

AIMS

Isolated limb perfusion with TNF and melphalan (TM-ILP) is highly effective in the local treatment of advanced sarcoma and melanoma of the limb. The optimal dose of TNF for this procedure is not well established. The aim of this study was to assess the efficacy and toxicity of TM-ILPs with reduced TNF dose.

METHOD

Largest single institution prospective database on TNF-based ILP. Out of 339 TM-ILPs performed between 1991 and 2003, 64 procedures were performed with reduced TNF dose (<3 mg in arm perfusions, <4 mg in leg perfusions). Response rates and toxicity of the procedure and outcome of the patients are evaluated.

RESULTS

Complete response in melanoma patients after reduced-dose ILP was 75 vs 69% after standard-dose ILPs (overall response 94 vs 95%, respectively); overall response in non-melanoma patients was 69 (reduced) vs 74% (standard). Response rates and outcome were comparable with the procedures performed with standard-dose TNF (p=NS for response, local/systemic progression and survival after multivariate analysis, both in melanoma and in non-melanoma patients). Systemic and local toxicity did not differ statistically between reduced- and standard dose TM-ILPs.

CONCLUSION

Provided doses at 1mg or higher are used, TM-ILP with TNF dose reduction for both melanoma and non-melanoma patients seems to be as effective as the standard dose procedure in terms of response rate and patient outcome. Numbers to formally confirm or reject this hypothesis are too large for such a non-inferiority trial to be conducted in patients with these rare conditions.

Isolated Limb Perfusions With Tumor Necrosis Factor and Melphalan for Locally Recurrent Soft Tissue Sarcoma in Previously Irradiated Limbs

BACKGROUND

Recurrent extremity soft tissue sarcoma (STS) in a previously operated and irradiated area can usually be managed only by amputation. Tumor necrosis factor (TNF)-alpha-based isolated limb perfusion (ILP) is an established alternative to achieve limb salvage but is assumed to require sufficient vasculature. Because radiotherapy is known to destroy vasculature, we wanted to evaluate retrospectively whether the outcome of ILP in patients with radiotherapy for their primary tumor nonetheless showed a benefit from TNF treatment.

METHODS

We consulted a prospective database of TNF-based ILPs at the Erasmus MC-Daniel den Hoed Cancer Center in Rotterdam. Out of 342 TNF-based ILPs between 1991 and 2003, 30 ILPs were performed in 26 patients with recurrent STS in the irradiated field after prior surgery and radiotherapy. Eleven patients (42%) had multiple tumors (n = 2-20). All patients were candidates for amputation.

RESULTS

We observed 6 complete responses (20%), 15 partial responses (50%), no change in 8 patients (27%), and progressive disease in 1 patient (3%). The median duration of response was 16 months (range, 3-56 months) at a median follow-up of 22 months (range, 3-67 months). The local recurrence rate was 45% in patients with multiple tumors and 27% in patients with single tumors. Ten patients (35%) died of systemic metastases. Limb salvage was achieved in 17 patients (65%). Regional toxicity was limited and systemic toxicity minimal.

CONCLUSIONS

TNF-based ILP can avoid amputations in most patients with recurrent extremity STS in a prior operated and irradiated field.

One hundred consecutive isolated limb perfusions with TNF-alpha and melphalan in melanoma patients with multiple in-transit metastases

OBJECTIVE

The aim of this study is to describe the experience with 100 TNF-based ILP for locally advanced melanoma and to determine prognostic factors for response, time to local progression, and survival.

METHODS

One hundred TNF-based ILPs were performed between 1991 and 2003 in 87 patients for whom local control by surgery of in-transit melanoma metastases was impossible. In total, 62 iliac, 33 femoral, and 5 axillary ILPs were performed in mild hyperthermic conditions with 2 to 4 mg of TNF and 10 to 13 mg of melphalan per liter of limb volume.

RESULTS

Overall response was 95%, with 69% complete response, 26% partial response, and 5% no change. Complete response rate differed significantly for patients with IIIA disease versus IIIAB and IV. Local and systemic toxicity was mild to moderate in almost all cases, with no treatment-related death and one treatment-related amputation. Five-year overall survival was 32%; local progression occurred in 55% after a median of 16 months. In complete response patients, 5-year survival was 42% with local progression in 52% at a median of 22 months. Response rate and survival were significantly influenced by stage of disease; (local progression free) survival was influenced by response rate.

CONCLUSIONS

TNF-based ILP results in excellent response rates in this patient population with unfavorable characteristics. Response on ILP predicts outcome in patients and reflects aggressiveness of the tumor.

Alterations in tumor necrosis factor-induced endothelial cell procoagulant activity by hyperthermia

TNF is a cytokine with potent antitumor activity in murine models and when administered clinically via regional perfusion. There is substantial evidence that this antitumor activity depends in large part on TNF's procoagulant effect on tumor neovasculature, which is mediated by induction of endothelial cell tissue factor (TF), a component of the extrinsic clotting cascade. In regional perfusion of a cancer-bearing limb or organ, TNF is always administered under hyperthermic temperatures; however, little is known about the effect of hyperthermia on TNF-mediated procoagulant activity in endothelium. We examined the effects of hyperthermia on TNF-mediated procoagulant activity in human umbilical vein endothelial cells (HUVECs). HUVECs were exposed to TNF at normothermic (37 degrees C) and hyperthermic (41 degrees C) temperatures for 90 min, then assayed for clotting activity, TF protein production and mRNA production of TF and tissue factor pathway inhibitor-2 (TFPI-2), an endogenous inducible inhibitor of TF activity in HUVECs. TNF treatment at 41 degrees C significantly reduced clotting activity, TF protein and mRNA as well as TFPI-2 mRNA compared to treatment at 37 degrees C. These data show that hyperthermia significantly reduces the procoagulant effects of TNF on endothelial tissue compared to normothermia, which may have important clinical implications for the use of TNF in regional perfusion.

Current uses of isolated limb perfusion in the clinic and a model system for new strategies

Isolated limb perfusion with melphalan is the treatment of choice for multiple (small) melanoma-in-transit metastases. The use of tumour necrosis factor alpha (TNFalpha) in isolated limb perfusion is successful for treatment of locally advanced limb soft-tissue sarcomas and other large tumours; this approach can avoid the need for amputation. TNFalpha was approved in Europe after a multicentre trial in patients with locally advanced soft-tissue sarcomas, deemed unresectable by an independent review committee; the response rate to isolated limb perfusion with TNFalpha plus melphalan was 76% and the limb was saved in 71% of patients. Moreover, the trial showed the efficacy of isolated limb perfusion of TNFalpha and melphalan against various other limb-threatening tumours such as skin cancers and drug-resistant bony sarcomas. Laboratory models of isolated limb perfusion have helped to elucidate mechanisms of action and to develop new treatment modalities. They have identified TNFalpha-mediated vasculotoxic effects on the tumour vasculature and have shown that addition of TNFalpha to the perfusate results in an increase of three to six times in uptake of melphalan or doxorubicin by tumours. New vasoactive drugs and new mechanisms of action are being discovered. Moreover, isolated limb perfusion is an effective modality for gene therapy mediated by an adenoviral vector. Various clinical phase I-II studies can be expected in the next few years.

Isolated limb perfusion in the management of locally advanced extremity soft tissue sarcoma

In conclusion, ILP is an interesting and important treatment option in the management of locally advanced extremity soft tissue sarcomas. Large medical centers, dealing with referrals and an important caseload of STS patients, should develop this treatment option and have it readily available to offer patients the best chances for limb salvage. In Europe, the success of TNF-based ILP has lead to the training, accreditation, and activation of TNF-based ILP programs in over 30 cancer centers since the approval of TNF for this indication in 1999. Thus, country by country centers for referral programs are established to deal with those categories of patients that can greatly benefit from the availability and integration of this treatment option in the STS treatment programs.

Intratumoral cisplatin/adrenaline injectable gel for the treatment of patients with cutaneous and soft tissue metastases of malignant melanoma

Local therapies have been highly effective in the treatment of melanoma. The objective of this study was to evaluate the use of a novel intralesional chemotherapy - cisplatin/adrenaline injectable gel - for the treatment of refractory or recurrent cutaneous and soft tissue melanoma metastases. The gel is injected directly into the lesion and delivers high concentrations of cisplatin at the injection site, where it is retained for extended periods, with little systemic exposure. A total of 28 patients with refractory or recurrent melanoma were enrolled in this open-label, multicentre study. Of these, 25 patients with 244 lesions were evaluable for efficacy. Lesions were injected with 0.5 ml (2 mg cisplatin + 0.05 mg adrenaline) of gel/cm(3) of tumour. Patients received up to six weekly treatments within an 8 week period. The objective response rate (complete responses [CRs] plus partial responses [PRs]) for all the tumours treated (1-72 per patient) was 53% (130 out of 244; 114 CRs, 16 PRs). The response rate for the target tumours (i.e. each patient's single, most symptomatic, largest or most threatening tumour) was 44%. The median response duration for all tumours was 347 days (range 30-783 days) and median number of treatments per tumour was five (range one to twelve). Systemic toxicity was negligible; local adverse reactions such as erythema, necrosis or pain occurred frequently, but were easily managed in most cases. In conclusion, cisplatin/adrenaline injectable gel was well tolerated, easy to administer, and effective in treating metastatic melanoma confined to the skin or soft tissues.

Hypoxic pelvic and limb perfusion with melphalan and mitomycin C for recurrent limb melanoma: a pilot study

Hypoxic pelvic and limb perfusion by means of a balloon occlusion technique was evaluated in patients with recurrent melanoma of the lower limbs who were non-responders to isolated hyperthermic limb perfusion or who were not eligible for this procedure. A pilot study was performed in 17 patients, who underwent hypoxic pelvic and limb perfusion with 50 mg/m(2) of melphalan or 50 mg/m(2) of melphalan and 25 mg/m(2) of mitomycin C. Each procedure was followed by haemofiltration. A leakage monitoring study was performed in five of the 17 patients. The response rate and time to disease progression were the primary endpoints, with overall survival as the secondary endpoint. During the procedures there were no technical, haemodynamic or vascular complications, and no deaths occurred during surgery or in the postoperative period. Significant leakage (median 40%) was measured in the five patients studied. No severe systemic or regional toxicity was observed. After one course of treatment, the objective response rate was 47% (95% confidence interval 22.5-71.5%), the median time to disease progression was 10 months (range 2-40 months), and the 3 year overall survival was 20%. Hypoxic pelvic and limb perfusion seems to be a safe and effective treatment for patients with unresectable recurrent limb melanoma who are not eligible for isolated hyperthermic limb perfusion. Due to the non-homogeneity of the study, with some patients receiving a combination of melphalan and mitomycin C and others receiving only melphalan, it is not possible to make definite conclusions with regard to efficacy. Further studies are necessary to establish whether the response rates can be improved by using different drug regimens.

Fifty tumor necrosis factor-based isolated limb perfusions for limb salvage in patients older than 75 years with limb-threatening soft tissue sarcomas and other extremity tumors

BACKGROUND

Isolated limb perfusion (ILP) with tumor necrosis factor (TNF) and melphalan is highly effective in treating limb-threatening soft tissue sarcoma (STS) and other bulky tumors. Because of fear of TNF-associated toxicity, ILP with TNF is not offered to older patients in some cancer centers, although especially in older patients, every attempt to avoid an amputation that may end their independence must be considered.

METHODS

Out of 306 TNF-based ILPs, 50 ILPs were performed for limb salvage in 43 patients >75 years old (range, 75-91 years): 29 STS and 14 melanoma patients.

RESULTS

In the STS patients, a response rate of 76% and a limb-salvage rate of 76% were achieved; in the melanoma patients, a 100% response rate and a 93% limb-salvage rate were achieved. Local toxicity was mild. The three postoperative deaths that occurred in the total series of 306 TNF-based ILPs in Rotterdam (<1%) occurred in patients >75 years old after leakage-free perfusions and were not related to TNF but to extremely high-risk profiles in these three patients.

CONCLUSIONS

Older patients should not be withheld a TNF-based ILP for limb salvage, because the procedure is safe and highly effective in these patients.

Safety and efficacy of isolated limb perfusion in elderly melanoma patients

BACKGROUND

Older patients are assumed to have a higher risk of complications from isolated limb perfusion (ILP). A study was performed evaluating the safety and efficacy of ILP in patients older than 75 years with advanced melanoma of the limbs.

METHODS

A total of 218 therapeutic ILPs with melphalan with or without tumor necrosis factor alpha were performed in 202 patients with advanced measurable melanoma and were analyzed retrospectively. Fifty-three patients (28%) were 75 years or older.

RESULTS

Complete response rates were 56% for those older than 75 years and 58% for the younger group (P =.79). Locoregional relapse occurred in 56% of the older group versus 51% in the younger group (P =.61). Limb toxicity, systemic toxicity, local complications, and long-term morbidity were similar in both age groups. Perioperative mortality was low, with one procedure-related death in the older group. Older patients stayed in the hospital for a median of 23 days (younger patients, 19 days; P <.01).

CONCLUSIONS

ILP results in similar response rates in the elderly with recurrent melanoma, without increased toxicity, complications, or long-term morbidity compared with younger patients. Older age in itself is not a contraindication for ILP.

Isolated limb perfusion in locally advanced cutaneous melanoma

Isolated limb perfusion (ILP) is a well-established locoregional procedure to deliver high doses of cytostatics to an extremity with multiple in-transit lesions from cutaneous melanoma, with minimal systemic and mild local toxicity. This approach is quite sophisticated and requires accurate monitoring of systemic leakage and of the temperature of the affected limb in order to avoid major systemic and local side effects. Mephalan (L-PAM) is considered the reference drug, although complete responses are reported in only about 50% of patients. Since the early 1990s, tumor necrosis factor-alpha (TNF-alpha) was administered with melphalan in ILP aiming to improve the therapeutic index of this procedure. However, despite the impressive results reported, its role still remains controversial, seemingly confined to large tumor bulk. Fotemustine ILP was proposed as a less toxic alternative to L-PAM, after the results of a pilot experience claiming similar response rates with less local toxicity. A formal phase 1-2 study is now underway to confirm these findings. More straightforward procedures, such as isolated limb infusion, are appealing, as they seem capable of achieving good response rates, are easily repeatable, and are less costly. Larger series are required to validate such results. As potential agents to be delivered through ILP, new vasoactive drugs and agents with new mechanisms of action that interplay with chemotherapy, as well as virus-mediated gene therapy, are being developed.