Microcylinders of endoplasmic reticulum in histiocytes in patients suffering from Degos' syndrome and dermatomyositis

Abstract
Rare intracytoplasmic membranous inclusions derived from the endoplasmic reticulum were observed in the histiocytes of 1 case of Degos'' syndrome and 1 case of dermatomyositis. Cross-sections and longitudinal sections allowed the establishment of a 3-dimensional model in which both microcylinders and layers of rolled-up double membranes appear.