Simple mesothelial pericardial cyst in a rare location

Area of Science:

• Cardiology
• Thoracic Surgery
• Pathology

Background:

• Pericardial cysts are uncommon, typically benign lesions within the chest.
• Most pericardial cysts occur in the cardiophrenic angles.
• Other locations for pericardial cysts are rare but documented.

Observation:

• A case of a pericardial cyst in a novel location is presented.
• The cyst was incidentally discovered within the interventricular septum.
• The patient underwent surgical excision of the cyst.

Findings:

• Pathological examination identified the cyst as a simple mesothelial pericardial cyst.
• This represents a previously undescribed site for a pericardial cyst.

Implications:

• The findings expand the known anatomical distribution of pericardial cysts.
• Understanding the etiology of these rare presentations remains an area for further research.
• This case highlights the importance of considering atypical locations for intrathoracic lesions.