18 July 2026
: Case report 
A 79-Year-Old Woman With Stage IIIB Lung Squamous Cell Carcinoma Presenting With Late-Onset Durvalumab‑Associated Myocarditis Requiring Differentiation From Pericardial Invasion
Unusual clinical course, Challenging differential diagnosis, Unusual or unexpected effect of treatment, Diagnostic / therapeutic accidents, Adverse events of drug therapy, Educational Purpose (only if useful for a systematic review or synthesis)
Norio Kodaka ABCDEF 1, Fumiyuki Hayashi BCE 2, Yuki Yokouchi BCE 3, Masahiro Yoshida BCE 4, Hiroto Matsuse ACDE 1*DOI: 10.12659/AJCR.953001
Am J Case Rep 2026; 27:e953001
Figure 2 (A) Electrocardiogram after concurrent chemoradiotherapy (CCRT): sinus rhythm within normal limits. (B) Electrocardiogram at the onset of myocarditis as an irAE: findings include sinus tachycardia, low voltage in all limb and chest leads, T-wave inversion in anterior leads, and a V1–V2 QS pattern.