ABSTRACT
We report the case of an intrapericardial lesion with the pathological features of a multilocular cyst, found on the adventitia of an aortic aneurysm in a 62-yr-old man. Microscopically, it consisted of numerous cavities lined by flattened or cuboidal cells with the immunocytochemical and electron microscopical features of mesothelium, sometimes forming a hyperplastic pattern. Numerous nerve bundles and collections of inflammatory cells were present in the stroma. These features were consistent with a reactive lesion.
Subject(s)
Cysts/pathology , Pericardium/pathology , Aortic Aneurysm/complications , Cysts/complications , Humans , Immunoenzyme Techniques , Male , Microscopy, Electron , Middle AgedABSTRACT
Solitary necrotic nodule of the liver is a uncommon benign lesion reported in old patients. The patients often had previous history of malignant lesions. The clinical aspects of S.N.N.L. suggest a metastatic lesion. The characteristic histological appearances are represented by a necrotic core (eosinophilic) surrounded by a hyalinised fibrotic tissue. We describe a case of S.N.N.L. identified in a 69 old woman previously resected for a colonic carcinoma.
Subject(s)
Liver Diseases/pathology , Liver Neoplasms/pathology , Adenocarcinoma/pathology , Adenocarcinoma/secondary , Aged , Colonic Neoplasms/pathology , Diagnosis, Differential , Female , Humans , Liver Neoplasms/secondary , NecrosisABSTRACT
A case of blue nevus in the lymph node capsule is described. It's not a common pathology and only few cases have been reported so far. Nevus-cell aggregates in the same location are more frequent and difference between the two entities is described. So for histogenesis of these lesions, a melanocyte migration arrest is favoured rather than the hypothesis of a 'benign metastasis' from a cutaneous primitive site.
