Spots Global Cancer Trial Database for Iscador® P (Mistletoe) Immunotherapy for Recurrent Osteogenic Sarcoma

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Trial Identification

Brief Title: Iscador® P (Mistletoe) Immunotherapy for Recurrent Osteogenic Sarcoma

Official Title: MISTOSUS: Iscador® P (Mistletoe) Immunotherapy To Improve Event Free Survival In Patients With Relapsed Osteosarcoma After Resection Of Pulmonary Metastases

Study ID: NCT05726383

Conditions

Osteogenic Sarcoma Recurrent

Interventions

Iscador*P

Study Description

Brief Summary: This will be a phase II, single arm study of osteosarcoma patients with fully resected pulmonary metastases. The MTD corresponds to the dosage recommendations of the manufacturer of Iscador® P which is licensed in Sweden, New Zealand, South Korea, Germany and Switzerland for the treatment of solid tumors and precancerous lesions. The study population includes patients with relapse of osteosarcoma in the lung following surgical resection of all gross disease (2nd or greater CR). Following completion of final thoracotomy, they will be treated with Iscador® P at concentrations up to the MTD with surveillance imaging via CT scan to monitor for relapsed disease.

Detailed Description: This will be a phase II, single arm study of osteosarcoma patients with fully resected pulmonary metastases. The MTD corresponds to the dosage recommendations of the manufacturer of Iscador® P which is licensed in Sweden, New Zealand, South Korea, Germany and Switzerland for the treatment of solid tumors and precancerous lesions. Iscador® P is to be injected subcutaneously (abdominal) 3 times/week. All patients will start with Series 0 (0.01mg, 0.01mg, 0.1mg, 0.1mg, 1mg, 1mg, 1mg). If tolerated, they will receive this series for 2 consecutive boxes (2 x 7 vials per box). This will then be followed by Series 1 (0.1mg, 0.1mg, 1mg, 1mg, 10mg, 10mg, 10mg), which will be administered for the following 2 consecutive boxes (2 x 7 vials per box). If tolerated, patients will proceed to Series 2 (1mg, 1mg, 10mg, 10mg, 20mg, 20mg 20mg), which will be continued through week 52 (13 cycles). The study population includes patients with relapse of osteosarcoma in the lung following surgical resection of all gross disease (2nd or greater CR). Following completion of final thoracotomy, they will be treated with Iscador® P at concentrations up to the MTD with surveillance imaging via CT scan to monitor for relapsed disease.