Pericardium is a specimen that uncommonly comes to pathology.

Pathologies of the pericardium

Idiopathic pericarditis - common.^[1]
Infectious pericarditis - post-procedural.
Fibrinous pericarditis.
Pericardial cyst.
- Rare 1 in 100,000
- Typical location: right cardiophrenic angle.^[2]

Malignant

↑ Smets P, Guettrot-Imbert G, Hermet M, et al. (September 2013). "[Recurrent pericarditis related to primary pericardial malignant mesothelioma]" (in French). Rev Med Interne 34 (9): 573–6. doi:10.1016/j.revmed.2013.04.021. PMID 23773902.
↑ Peebles CR, Shambrook JS, Harden SP (December 2011). "Pericardial disease--anatomy and function". Br J Radiol 84 Spec No 3: S324–37. doi:10.1259/bjr/16168253. PMC 3473919. PMID 22723538. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3473919/.