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Targeted therapy in BRAF mutated aggressive papillary craniopharyngioma: a case report and overview of the literature

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Abstract

Background

Papillary craniopharyngiomas harbor the BRAF V600E mutation, which paves the way for using BRAF inhibitor molecules to treat tumors refractory to standard therapies. Single case reports confirmed the efficacy of targeted therapy. However, most reports were limited by the short follow-up. We describe the long-term course of a patient treated with dual-agent BRAF and MEK inhibitors and review the available literature.

Case report

A 75-year-old male patient had recurrence of a papillary craniopharyngioma after transsphenoidal surgery and Gamma Knife radiosurgery. Review of the pathologic specimen confirmed the presence of the BRAF V600E mutation. Because of the few therapeutic options, we decided to initiate BRAF/MEK inhibitor combined therapy for six months. Rapid reduction of the tumor occurred, but three months after quitting combined medical therapy the tumor recurred. BRAF/MEK inhibitor therapy was resumed and the tumor again showed a marked reduction. The second course was maintained for 20 months and the tumor showed another recurrence within three months, which, again, responded to a third course of targeted therapy.

Conclusions

Our study confirms the excellent response of papillary craniopharyngioma to combined BRAF and MEK inhibitors. However, rapid tumor recurrence is the rule when medical therapy is stopped. Resistance to a second and third course of targeted therapy did not occur, suggesting that tumor mutations affecting the response to drugs seems an uncommon event in papillary craniopharyngioma. The exact role of targeted therapy in the treatment algorithm of papillary craniopharyngiomas has still to be refined.

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Losa, M., Mazza, E., Pedone, E. et al. Targeted therapy in BRAF mutated aggressive papillary craniopharyngioma: a case report and overview of the literature. J Endocrinol Invest (2024). https://doi.org/10.1007/s40618-024-02382-7

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