A cardiac rhabdomyoma in a Guinea pig.

Abstract:

:A guinea pig (9-week-old) that had been placed in a control group for a pharmacological test was found to have a single nodule on the surface of the right ventricular wall. In a transverse section of the heart after fixation, a whitish mass was found that extended from the subendocardium to the subepicardium of the right ventricular wall. Histopathological examination revealed a spongy network consisting of vacuolated spaces in the myocardium of the right ventricle extending to the myocardium and subepicardium of the right atrium. The vacuolated space was PAS-positive. Immunohistochemical examinations revealed that the lesions contained striated fibers that were positive for anti-desmin and anti-myoglobin. Electron micrographs revealed the lesions resulting in affected striated muscle fibers and accumulations of many glycogen granules. Based on the findings, the lesions were diagnosed as a cardiac rhabdomyoma. This is the first report of application of immunohistochemical examinations to diagnosis of cardiac rhabdomyoma in the guinea pig.

journal_name

J Toxicol Pathol

authors

Kobayashi T,Kobayashi Y,Fukuda U,Ozeki Y,Takahashi M,Fujioka S,Fuchikami J

doi

10.1293/tox.23.107

subject

Has Abstract

pub_date

2010-06-01 00:00:00

pages

107-10

issue

2

eissn

0914-9198

issn

1881-915X

pii

0542

journal_volume

23

pub_type

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