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Aggressive natural killer-like T-cell malignancy with leukemic presentation following solid organ transplantation.
Y Natkunam1, R A Warnke, J L Zehnder
1Department of Pathology, Stanford University School of Medicine, CA, USA.
American Journal of Clinical Pathology
|May 7, 1999
Summary
This study highlights rare NK-like T-cell malignancies in transplant patients. These aggressive cancers can present with leukemia-like symptoms, emphasizing the need for early diagnosis in immunosuppressed individuals.
Area of Science:
- Hematology
- Oncology
- Transplant Immunology
Background:
- Lymphoproliferative disorders are a known complication of immunosuppression after solid organ transplantation.
- NK-like T-cell malignancies represent a challenging subset within these disorders.
Observation:
- Two cases of long-standing immunosuppressed patients post-transplant presented with systemic symptoms like fever, myalgia, and weight loss.
- Initial presentation mimicked leukemic symptoms, with no initial organ involvement or lymphadenopathy.
- Both patients displayed an anomalous T/NK phenotype (CD56+) with large granular lymphocytes exhibiting atypical blastic architecture.
Findings:
- Clonal T-cell receptor gene rearrangement was confirmed in both patients.
- One patient had a documented cytogenetic abnormality (8q24).
- Both cases demonstrated aggressive disease progression with rapid, multi-site involvement and fatal outcomes.
Implications:
- NK-like T-cell malignancies should be considered in the differential diagnosis of lymphoproliferative disorders in immunosuppressed transplant recipients.
- A leukemic presentation can precede an aggressive clinical course, necessitating prompt recognition and management.
- Understanding these rare malignancies is crucial for improving outcomes in post-transplant patients.