Rare finding of a symptomatic epidermoid cyst of the diaphragm - a case report.

Cystic lesions of the diaphragm are rare and accordingly present a diagnostic challenge. Specific radiological features with which to clinch a diagnosis may be elusive. Herein we present the case of a patient who presented with symptoms attributable to a cyst in the left upper abdomen, irritating the diaphragm. Surgery was considered appropriate for diagnostic and symptomatic purposes. Final histology demonstrated an epidermoid cyst. Resolution of symptoms was reported after surgery. Diaphragmatic epidermoid cysts appear to be a rare entity with only three prior cases reported in the literature. Given the rarity of this lesion and the lack of unique features by which they can be characterized, accurately diagnosing epidermoid cysts of the diaphragm is likely to remain difficult without surgery, although they are presumed to have a benign behaviour.