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Updated: Jun 1, 2026
Teratoma Generation in the Testis Capsule
Published on: November 7, 2011
Teratoma of the mediastinum: a case report
Ricardo D Vieira1, Henrique Grimberg, Kiyomi K Uezumi
1Department of Atherosclerosis, Heart Institute of the University of São Paulo, Av Dr Eneas de Carvalho Aguiar 44, AB, Sala 114, Cerqueira César, São Paulo-SP, 05403-000, Brazil. mass@incor.usp.br.
Introduction:
This case report illustrates a rare case of teratoma of the mediastinum which was continuous to the pericardium and caused extrinsic compression to the right atrium.
Case Presentation:
A 22-year-old Caucasian man with no complaints or comorbid conditions presented to our hospital with obliteration of the right cardiophrenic sinus by a mass. A non-invasive investigation demonstrated a tumoral mass which was continuous to the pericardium and caused extrinsic compression to the right atrium. The clinical suspicion was a pericardial or bronchogenic cyst. Surgical and anatomopathologic findings led to the diagnosis of a mature cystic teratoma with atrophic thymic tissue at the external teratoma surface.
Conclusion:
We present an original report of a mature teratoma causing obliteration of the right cardiophrenic sinus with extrinsic heart compression. The diagnosis of this tumor is very difficult through non-invasive investigation.