Clinical experience about hyperthermia efficacy

There is modest experience of hyperthermia efficacy in the threatment of advanced therapy resistant tumours (Fradkin 1990, Bull 1992, Wiedemann 1996, D. Jäger 1998). Our results confirm the effectivity of complex treatment (whole body and local hyperthermia in combination with a second line or palliative chemotherapy) of 13 patients with advanced ovarian cancer after extensive multiple chemotherapies (in some cases up to 8 previous chemotherapy schemas): the response of 69,2% and remissions at 15,5% were registrated. Median Remission duration was 6,1 Months. The median follow-up duration for all patients was 11,7 months (range, 2,5 to 22). We treated also 36 patients with advanced breast cancer with second line or palliativ chemotherapy after extensive pretreatment. The complex treatment contented: systemic whole body hyperthermia, chemotherapy, anti-hormone treatment, local regional hyperthermia. A response rate of 66.4% was registered,13 (36.1%) of patients went into remission (5.6% CR, 30.5% PR). No change was noted in 11 patients (30,5%). Median Remission duration was 5,9 Months. The median follow-up duration for all patients was 12,1 months. Resistance to antineoplastic drugs is a extremely complex mechanism. Only a detailed investigation of all different types of MDR can allow us to fully understand these multifactorial events and to develop complex strategies for overcoming drug resistance (M. Dietel,1998). Conventionel chemotherapy by advanced and therapy refractory cancer could not overcome the MDR. Hyperthermia proposes incredible increasing of chemotherapy effects and its mechanisms should be also enquired at molecular-pathologic and genetic levels in details.




Whole Body Hyperthermia in Patients with Refractory Tumours

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Whole Body Hyperthermia (WBH) 41,8 degree C combined with chemotherapy in patients with chemotherapy resistant ovarian cancer and breast cancer
D. Jäger et al. 1998

Objective: WBH 41,8 degree C using the Aquatherm radiant heat device combined with chemotherapy is a well established treatment in chemotherapy-resistant cancers of different histological origin. Materials and methods: Four patients with platinum resistant ovarian cancer were treated with WBH 41,8 degree C and carboplatin (AUC 8). 6 patients with progressive breast cancer disease under previous palliative chemotherapies were treated with WBH 41,8 degree C and ICE (Ifosfamid 5g/m­ d1, Carboplatin 300 mg/m­ d1, VP 16 100 mg/m­ d 1-3; q d28). Whole body hyperthermia was performed using the Aquatherm radiant heat device as described elsewhere. Results: One patient with ovarian cancer achieved complete remission (CR) after 4 treatment cycles, two patients had a partial remission (PR) and one patient had a stable disease (SD) over a period of at last 10 weeks. Five of six patients with breast cancer, two of them with inflammatory breast cancer, achieved partial remission (PR), and one patient had stable disease for at least 16 weeks. Conclusions: Platinum resistence in patients with ovarian cancer can be overcome with the combination treatment modality of carboplatin with WBH. In advanced breast cancer ICE combined with WBH may be a promising therapy for patients refractory to previous palliative chemotherapies.




Clinical experience St. Georg Hospital, Bad Aibling, Germany
Retrospective analysis

Complex therapy

13 patients with advanced breast cancer (received first line chemotherapy) were eligible. Each patient was treated with FEM chemotherapy, on days 1 and 7 in combination with WBH, antihormonal therapy and local electro magnetic hyperthermia (13,56 MHz) .
Chemotherapy:
750 mg 5-FU day 1,2,3,7,14
30 mg Epirubicin day 1,7
10 mg Mitomycin C day 1,2
Results: we obtained in 30,7% Complete Remission (CR), 38,5% Partial Remission (PR), 23,2% No Change (NC). We compared our results with results of effective classic regimens in the treatment of metastatic breast cancer ( J. Smith and J. Powels, 1993 Oncology), statistic not significant.


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Palliative therapy

13 patients with advanced ovarian cancer after surgical procedure and previous multiple chemotherapes (until 8 regimens) and 36 patients with advanced breast cancer after extensive pretreatment were eligible.
During the WBH a core temperature of 41.5º - 42ºC was attained in the rectum. The head was cooled once a temperature of 40ºC had been reached. We combined the WBH with 300-400mg/dl artificial hyperglycemia (HG). The plateau temperature was held over a period on average of 90±30min, the HG on average 240±30min. WBH was repeated at the beginning of each new chemotherapy cycle. WBH were administered between 1 and 5 times, on average 3. After reaching the maximum temperature plateau, each patient received chemotherapy; this was dependant upon response of previous therapies.


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Posttreatment histology about hyperthermia efficacy


Pathomorphosis and microcirculation status of osteogenic sarcoma after a complex neoadjuvant chemo and radio therapy in combination with local electromagnetic hyperthermia.

Bogovic J. et al. 1991, 1998, 2000

Many biological attributes of tumours can deteriorate homogeneity distribution of heat during hyperthermia. Temperature expansion and temperature elevation are directly dependant on regional blood flow and microcirculation and varying tissue thermal tolerance characteristics. (We attempted to determine the connection between the microcirculation status of osteogenic sarcomas and the morphological changes and devitalisation in the tumour tissues (pathomorphosis or posttreatment histology) after a complex neoadjuvant treatment with chemotherapy and irradiation in combination with local electro magnetic hyperthermia. 62 patients with histology verfied osteosarcoma (35 men, 27 women), average age 21 (9 to 53), were chosen for this study. In 72,6% of these cases the tumour was localized in the bones forming the knee joints. All patients received a complex neoadjuvant treatment (60 minutes local regional hyperthermia (42-45°C), and monochemotherapy i.v. or i.a. with rubomycin 30-50 mg/m² 6 infusions, adriamycin or cisplatin single dose of 30 mg/m² for 3 days or once 90mg/m² before hyperthermic procedure; subsequently enforced distant gamma-therapy). Surgery was done after the treatment. 20 patients underwent a primary operation were included in a control group. Every resected tumour was histologicaly investigated in detail for assessment of therapeutic induced alterations - pathomorphosis. Minimal devitalisation of the tumour parenchyma complied with the 2. Grade of therapeutic pathomorphosis, subtotaled with the 3. Grade, total devitalisation (100% necrosis of the tumour parenchyma) corresponded with grade 4 of therapeutic pathomorphosis. Using a light microscope combined with a semiautomatic picture analysis PC-system "Integral 2 MT" we evaluated the functionality status of microcirculation on histological cuts and measured the total surface (m m2) of 50 vessels in every tumour. The investigated vessels of control tumours displaced from 2,85 to 73,4% of damage of the microcirculation, in median 21,69 %. A relative low amount of regional dose radio therapy (20-36 Gy) and chemotherapy with adriamycin and cisplatin using 5-6 applications of local hyperthermia induced distinct damage to tumour tissue: in 39,3% cases sub-total and in 35,7% total (devitalisation of tumour parenchyma). Thrombosis of magistral and middle vessels, obstruction of blood flow and stasis in microcirculation tree (collapse), damage of vessels intima and of endothelial cells, necrotic alterations of the vessels walls appeared predominantly in central areas of the tumours. Likewise exhibit peripheric tumour zones noticeable signs of microcirculation disturbance. In tumours with pathomorphosis grade 2 reach share of nonfunctional vessels from 10,6 till 61,7%, in median 29,7%. From 34,5 till 72,0% - in median 49,46% - of vessels in tumours with a third pathomorphosis grade were nonfunctional (stasis, thrombosis). In 10 cases with 4 pathomorphosis grade we registered the median of nonfunctional vessels in tumours of 56,05%. There is a direct correlation between the deterioration of the microcirculation in tumour tissue and it´s alteration throughout the thermoradiochemotherapy, the pathomorphosis grade is directly proportional with a number of nonfunctional vessels in the osteogenic sarcoma.



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