Foscarnet desensitization for treatment of Cytomegalovirus in a child with drug allergy post stem cell transplantation: A rare case report summary

Ha Phuong Anh, Chu Hong Hanh, Nguyen Thi Nga, Ha Thi Hoa, Dang Thi Cam Bang, Nguyen Ngoc Quynh Le

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Abstract

Cytomegalovirus (CMV) is a life-threatening opportunistic infection in patients undergoing allogeneic hematopoietic stem cell transplantation. Foscarnet is an effective antiviral agent against CMV; however, hypersensitivity reactions may limit its use. We report a child diagnosed with Wiskott- Aldrich syndrome who underwent stem cell transplantation. During transplantation, the child developed CMV infection that did not respond to conventional treatment, therefore intravenous foscarnet was prescribed. However, the child experienced anaphylaxis. Due to lack of suitable alternative therapy, intravenous foscarnet desensitization was performed. The desensitization protocol was successfully completed under close monitoring. The 22-step desensitization protocol was performed safely, tolerated well, the stem cell transplantation was successful, and CMV was controlled, with no recurrence of the allergic reaction. Foscarnet desensitization is a viable and effective option for treating CMV infection in patients with drug hypersensitivity reactions.

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References

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