[Morphology and incidence of membranous structures related to endoplasmic reticulum].

Morphology and occurrence of so called tubuloreticular (TRS) and undulating membraneous structures (UMS) connected with the membranes of the endoplasmatic reticulum are described in physiological and pathological conditions. It is established that TRS and UMS represent a cytoplasmatic inclusion of similar type, although of different structures. Occurrence of UMS in human lung-tissue culture, and in transplantable chicken hepatoma induced in a hepatic tumour by MC-29 virus was observed.