Primary brain lymphomas after kidney transplantation: an under-recognized problem?

Area of Science:

• Neuroscience
• Immunology
• Oncology

Background:

• Primary central nervous system post-transplant lymphoproliferative disease (CNS PTLD) is a rare but severe complication following solid organ transplantation.
• The incidence of CNS PTLD may increase with the use of novel biological agents in immunosuppression protocols.

Purpose of the Study:

• To investigate the clinical characteristics, diagnosis, and outcomes of CNS PTLD in transplant recipients.
• To highlight the diagnostic challenges and emphasize the need for early detection.

Main Methods:

• Retrospective analysis of five cases of CNS PTLD diagnosed between 1986 and 2007.
• Review of clinical presentation, diagnostic workup including serology, in situ hybridization, and PCR for Epstein-Barr virus (EBV), and treatment outcomes.

Main Results:

• The mean time from transplantation to neurological symptoms was over 6 years, with diagnosis taking an average of 3.5 months.
• Clinical manifestations were diverse, including headache, gait disturbance, and confusion. EBV was detected in most cases via serology, biopsy, or CSF PCR.
• Treatment involved reducing immunosuppression, but mortality remained high, with three of four treated patients dying within 2 years.

Conclusions:

• CNS PTLD is difficult to diagnose, often detected late, and frequently resistant to treatment.
• A proactive screening approach is recommended for transplant patients presenting with even subtle central nervous system symptoms.