a Overview showing mesothelial cells with the cell in the upper part containing abundant LIs, which are distributed in a perinuclear fashion. Cells in the lower part without LIs (TEM, ×4,400). b, c Higher magnification of the LIs of the cells shown before. The LIs consist of parallely arranged lamellae or tubules in the cisternae of the rER. Ribosomes connected to the rER as well as free ribosomes can also be appreciated. ×11,000, TEM (b); ×71,000, TEM (c). TEM, transmission electron microscopy; rER, rough endoplasmic reticulum; L, lysosome; LIs, lamellar inclusions; N, nucleus; M, mitochondria; R, ribosomes; FR, free ribosomes; ER, endoplasmic reticulum.