Large Right Atrial Myxoma With Endocrine Abnormalities as a Possible Case of a Syndromic Disease: A Case Report.

The late onset of significant symptoms in this case provides valuable insight for future research on multiple neoplasia and endocrine syndromes, emphasizing the challenges of timely recognition. As syndromic features may regress over time, careful attention to detailed clinical history and subtle past manifestations remains essential for diagnosis and management.