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and Melphalan
From the Departments of Surgical Oncology (RJVG, HSK, HJH), Internal Medicine (PCL), and Nuclear Medicine (DAP), Groningen University Hospital, Groningen, the Netherlands.
Correspondence: Address correspondence and reprint requests to: Harald J. Hoekstra, MD, PhD, Department of Surgery, Division of Surgical Oncology, Groningen University Hospital, PO Box 30.001, 9700 RB Groningen, the Netherlands; Fax: 0031-503614873; E-mail: h.j.hoekstra@ chir.azg.nl.
Background: The aim of this study was to analyze the value of continuous leakage monitoring with radioactive iodine-131labeled human serum albumin (RISA) in patients treated with hyperthermic isolated limb perfusion with tumor necrosis factor-
(TNF
) and melphalan.
Methods: Forty-eight patients with melanoma (n = 14) or soft tissue sarcoma (n = 34) of an extremity underwent 51 perfusions. Perfusion was performed at the iliac level in 22 cases, at the popliteal level in 16 cases, at the femoral level in 7 cases, and at the axillary level in 6 cases. Leakage rates and perfusion circuit and systemic levels of TNF
, interleukin-6, and C-reactive protein were determined, as were systemic hematological and metabolic profiles and tumor response.
Results: The mean isotopically measured leakage was 2.9%. Systemic leakage was
2% in 28 perfusions and >2% in 23 perfusions. The correlation between the maximal monitored leakage and maximal systemic TNF
levels was .7114. The area under the curve for TNF
in the perfusion circuit, indicating the exposure of the perfused limb to TNF
, was 18.7% lower in the >2% leakage group. No significant differences in tumor response were found between groups. The area under the curve for systemic TNF
, indicating the exposure of the patient to TNF
, was 18.1 times higher in the >2% leakage group, resulting in a significant decrease in leukocyte and platelet count, hyperbilirubinemia, hypocholesterolemia, and proteinemia. No beneficial effect of the systemically leaked TNF and melphalan was seen on the occurrence of distant metastasis during follow-up. There was a significant difference between perfusions performed at the iliac and femoral levels compared with leakage values at the popliteal level.
Conclusions: A good correlation between RISA leakage measurement and TNF
exposure during and after hyperthermic isolated limb perfusion with TNF
and melphalan was demonstrated. RISA leakage measurement serves as a good guide for the effectiveness of isolation during perfusion. If leakage exceeds the 2% limit during perfusion, less exposure of the tumor-bearing limb to TNF
, increased exposure of the patient systemic circulation to TNF
, and more systemic side effects can be expected.
Key Words: Hyperthermic isolated limb perfusion Leakage Iodine-131labeled human serum albumin Sarcoma Melanoma Tumor necrosis factor-
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