Frozen sections unit with a freezing microtome (Microm). Immunofluorescence: on renal, cutaneous, muscular biopsies, totally automated with a freezing Microtome (Microm), a Microscope with UV lamp and stainers Nexes Brand (Benchmark LT). Immunohistochemistry unit: Totally automated to insure the best and optimal conditions for good techniques Nexes (Benchmark LT – XT – GX x 2).