30 July 2026
: Case report 
Thoracic SMARCA4-Deficient Undifferentiated Tumor Presenting as a Giant Mediastinal Mass: A Case Report
Challenging differential diagnosis, Rare disease, Educational Purpose (only if useful for a systematic review or synthesis)
Nanami Ichihashi ABCDEF 1, Motona Kumagai
ABCDEF 2,3*, Miyako Shimasaki BCDEF 2, Akihiro Shioya BCDEF 3,4, Sohsuke Yamada BCDEF 3,5
DOI: 10.12659/AJCR.952937
Am J Case Rep 2026; 27:e952937
Figure 1 Radiological findings of the mediastinal tumor(A) Non-contrast chest computed tomography showing a large mass measuring up to 7 cm in maximum diameter, extending from the anterior to superior mediastinum (yellow arrow). (B) Positron emission tomography-computed tomography demonstrating intense fluorodeoxyglucose uptake (shown in red) in the region corresponding to the anterior mediastinal tumor.