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Inadvertent transplantation of a melanoma
Abstract:
A cadaver renal allograft recipient with normal function for over 3 years developed metastatic melanoma and died within months despite cessation of immunosuppression and allograft nephrectomy. Two additional immunotherapeutic modalities were attempted when it became obvious that the tumor was not a de novo malignancy but rather an inadvertently transplanted one. Neither reexposure to the allograft antigens nor administration of alloantiserum from the patient who had received and rejected the mate of the kidney from the same donor affected the rapid growth of the melanoma in our patient. Of extreme interest is that a focus of melanoma was found in the allograft removed from the surviving patient.
Insights
A kidney transplant recipient developed metastatic melanoma from the donor organ. Despite treatment, the cancer spread rapidly, highlighting the risk of inadvertently transplanted malignancies in organ recipients.
Area of Science:
- Oncology
- Transplant Immunology
- Nephrology
Background:
- Organ transplantation requires long-term immunosuppression, increasing cancer risk.
- Malignancies can be inadvertently transmitted via donor organs.
Observation:
- A renal allograft recipient developed metastatic melanoma over 3 years post-transplant.
- The melanoma rapidly progressed despite immunosuppression withdrawal and kidney removal.
Findings:
- Transplanted melanoma demonstrated aggressive growth, unaffected by immunosuppression cessation or specific immunotherapies.
- A focus of melanoma was identified within the explanted renal allograft.
Implications:
- This case underscores the critical need for rigorous donor screening to prevent transmission of occult malignancies.
- Understanding melanoma's behavior in immunosuppressed hosts is crucial for managing transplant recipients.