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Ref Type
PMID (36157689)
Authors Saijo K, Imai H, Katayama H, Fujishima F, Nakamura K, Kasahara Y, Ouchi K, Komine K, Shirota H, Takahashi M, Ishioka C
Title BRAF and MEK Inhibitor Treatment for Metastatic Undifferentiated Sarcoma of the Spermatic Cord with BRAF V600E Mutation.
Abstract Text An 18-year-old Japanese man was diagnosed with an undifferentiated sarcoma of the spermatic cord, with multiple distant metastases to the lungs and bones. The patient received doxorubicin-based standard chemotherapy. Although the chemotherapy was effective, it induced severe adverse events, which led to treatment discontinuation. A comprehensive genomic profiling test using resected tumor tissue revealed the BRAF V600E mutation. Based on the result, the patient received combination therapy with dabrafenib and trametinib. The combination therapy achieved a good response with few adverse events. However, 6.5 months later, pleural metastases and meningeal dissemination had emerged. A liquid comprehensive genomic profiling test was performed after the progression to identify the resistance mechanism, which resulted in the detection of no actionable gene alterations other than BRAF V600E. This report shows that the BRAF V600E mutation may be a promising therapeutic target and that resistance to the targeted therapy could also occur in soft tissue sarcoma. The significance of BRAF mutations across different types of cancer should be validated, and it is necessary to apply targeted therapies and develop methods to overcome resistance based on the optimal use of comprehensive genomic profiling tests.


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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
BRAF V600E spermatic cord cancer predicted - sensitive Dabrafenib + Trametinib Case Reports/Case Series Actionable In a clinical case study, treatment with the combination of Tafinlar (dabrafenib) and Mekinist (trametinib) resulted in a regression of the lung metastasis and progression-free survival of 6.5 months in a patient with undifferentiated sarcoma of the spermatic cord harboring BRAF V600E (PMID: 36157689). 36157689