• Goohyeon Hong.
• Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Dankook University Hospital, Dankook University College of Medicine, 201 Manghyang-ro, Dongnam-gu, Cheonan 31116, Republic of Korea.
• Medicina (Kaunas). 2023 Dec 10; 59 (12).

AbstractTumor lysis syndrome (TLS) is a potentially fatal oncological emergency that typically develops during the treatment of rapidly proliferating malignancies. It is infrequently reported in solid tumors, such as pulmonary adenocarcinoma. A 59-year-old male patient with shortness of breath presented with a 3.3 cm × 3.0 cm mass in the right upper lobe, along with massive right-sided pleural effusion. A percutaneous needle biopsy was performed, and a diagnosis of pulmonary adenocarcinoma with an epidermal growth factor receptor (EGFR) mutation was made. The patient was treated with afatinib because of the malignant pleural effusion and multiple metastases to the intrathoracic lymph nodes, left scapula, and brain. After 4 days of afatinib treatment, he developed oliguric acute kidney injury and progressively worsening dyspnea. Based on the clinical and laboratory findings, the patient was diagnosed with afatinib-induced TLS. To the best of our knowledge, this is the first reported case of afatinib-induced TLS in pulmonary adenocarcinoma.

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