Radiation recall after a transarterial hepatic chemoembolization.

Area of Science:

• Oncology
• Radiology
• Pharmacology

Background:

• Radiation recall is an uncommon adverse effect of radiation therapy.
• It manifests as a localized tissue reaction mimicking radiation dermatitis.
• This reaction occurs when specific medications are administered after radiation exposure.

Observation:

• A patient with metastatic carcinoid tumor underwent fluoroscopically guided hepatic chemoembolization.
• Seven weeks post-procedure, the patient received oral capecitabine and temozolomide.
• The patient subsequently developed a radiation recall reaction in the previously irradiated hepatic area.

Findings:

• The case demonstrates a radiation recall phenomenon.
• The recall was attributed to the interaction between prior radiation therapy and subsequent administration of capecitabine and temozolomide.
• This suggests a potential drug-radiation interaction in managing metastatic carcinoid tumors.

Implications:

• This case underscores the importance of considering radiation recall when patients develop skin reactions after radiation therapy and subsequent chemotherapy.
• Awareness of this interaction is crucial for oncologists and radiologists managing patients with metastatic cancers.
• Further investigation into the mechanisms and predictive factors of radiation recall is warranted.