[Begnin naevus cell inclusions in two patients treated for cancer].

In 1897, Reis was the first to describe benign nevus inclusions in the lymph node of patients undergoing surgery for genital neoplasia. These inclusions are very rarely encountered and can be misleading in the absence of careful analysis. We report on two cases of nevus cell inclusions in axillary and inguinal lymph nodes dissected in the context of breast cancer and thigh sarcoma respectively.

[Hydatidosis: apropos of several uncommon locations].

Most hydatid cysts are found in the liver or lungs but occurrence in other locations is possible. The purpose of this report is to describe three cases involving cysts locate in the ovary, joint, and thyroid. Clinical findings associated with these uncommon locations were poorly specific and diagnosis required histological examination after surgical exploration.

Cytokeratins expression in paragangliomas of the cauda equina.

Background: Paragangliomas rarely involve the cauda equina region. In this location, these tumors can show misleading morphological features such as trabecular or papillary growth patterns and variable expression of cytokeratins.

Methods: We comparatively studied the immunohistochemical and ultrastructural patterns of 3 paragangliomas of the cauda equina (PCE) and of 8 paragangliomas from other sites.

[Immunohistochemical study of lesions in Horton's temporal arteritis before and during corticotherapy].

The immunohistochemical study was performed on temporal artery biopsies from eight patients with giant cell (temporal) arteritis: three before treatment, four after a short period of corticosteroid therapy (from 1 day to 7 days) and one during relapse occurring after a treatment of 9 years; from four subjects with clinical symptoms but without histological features of giant cell arteritis and from five negative controls. Before treatment, biopsies of patients with temporal arteritis showed an inflammatory infiltrate with macrophages and T cells, essentially CD4+ and memory T cells (CD45 RO+), expressing the markers of activation IL2 receptor and HLA DR. Few B and NK cells were also detected.