[Gardner's syndrome and epidermoid cyst of the thymus]

The hitherto undescribed association of Gardner's syndrome (familial adenomatous polyposis coli, abdominal fibromas, osteoma, dental abnormality, cystic fundic gland polyposis) with a thymic epidermoid cyst in a 38 year old woman is reported. Thymic cyst was discovered on a routine chest roentgenogram, and diagnosis, suspected by CT findings, was established by histological examination of surgical material. The authors suggest that this association is not fortuitous.