# Clinical Features and Outcomes of Spontaneous Tumor Lysis in Testicular Germ Cell Tumors: A Case Series From a Cancer Center in Lahore, Pakistan

## TL;DR

This study examines spontaneous tumor lysis syndrome in testicular cancer patients, highlighting its risks and management in a Pakistani cancer center.

## Contribution

The paper provides a case series from Lahore, Pakistan, detailing clinical features and outcomes of spontaneous TLS in testicular germ cell tumors.

## Key findings

- All six patients had TLS diagnosed before chemotherapy initiation, with seminomatous histology and extensive tumor burden.
- Management included hydration, urate-lowering therapy, and renal replacement therapy, but mortality remained high due to renal failure and infections.
- Tumor burden was identified as a key risk factor for TLS, regardless of histological subtype.

## Abstract

Background

Testicular germ cell tumors (TGCTs) are the most common solid malignancies in young adult men and typically have excellent outcomes with modern therapy. Tumor lysis syndrome (TLS) is a rare but potentially fatal complication in TGCTs, particularly when it occurs spontaneously in the absence of cytotoxic treatment. Data describing spontaneous TLS in this setting remain limited.

Methods

We report a case series of six patients who presented with spontaneous TLS secondary to TGCTs. Clinical features, imaging findings, laboratory results, management strategies, and outcomes were reviewed retrospectively from the electronic medical records. TLS was diagnosed based on characteristic biochemical abnormalities, including hyperuricemia, hyperphosphatemia, hyperkalemia, hypocalcemia, and acute kidney injury (AKI).

Results

Most patients had seminomatous histology, and all demonstrated extensive tumor burden on imaging. TLS was identified prior to the initiation of chemotherapy in all cases. Management included aggressive intravenous hydration, urate-lowering therapy with rasburicase and/or allopurinol, and renal replacement therapy for refractory metabolic disturbances. Chemotherapy was initiated with individualized dosing strategies to minimize further metabolic complications. Despite early recognition and multidisciplinary management, mortality was substantial, largely due to renal failure and infectious complications.

Conclusions

Spontaneous TLS is a rare but life-threatening complication of TGCTs, particularly in patients with bulky disease. Tumor burden appears to be a key risk factor regardless of histological subtype. Increased clinical awareness, early diagnosis, aggressive supportive care, and tailored chemotherapy approaches are critical to reducing morbidity and mortality in this high-risk population.