Hypercalcemia in tumor lysis syndrome

Area of Science:

• Oncology
• Nephrology
• Hematology

Background:

• Tumor lysis syndrome (TLS) is a oncologic emergency characterized by metabolic abnormalities.
• Typical metabolic derangements include hyperkalemia, hyperuricemia, hypocalcemia, and hyperphosphatemia.
• Diffuse large B cell lymphoma is an aggressive non-Hodgkin lymphoma.

Observation:

• This report details a rare case of TLS in a patient diagnosed with diffuse large B cell lymphoma.
• The patient presented with atypical electrolyte imbalances during TLS.
• Specifically, hypercalcemia was observed, which is an uncommon finding in TLS.

Findings:

• The case demonstrates that tumor lysis syndrome can manifest with hypercalcemia.
• This challenges the typical understanding of TLS electrolyte disturbances.
• Diffuse large B cell lymphoma can be associated with this atypical TLS presentation.

Implications:

• Clinicians should consider hypercalcemia in the differential diagnosis of TLS, even when other typical electrolyte abnormalities are present.
• This case broadens the understanding of potential metabolic complications in patients with hematologic malignancies.
• Further research may be warranted to explore the mechanisms behind hypercalcemia in TLS and its management.