Sections from the serial sectioning of a specimen from non-pregnant cervix showing a corpuscle and surrounding tissue. The sections were processed for PGP 9.5 (TRITC staining) (a), p75 (b) and PGP 9.5 (PAP staining) (c). Asterisks at corresponding regions just outside the corpuscle. The corpuscle and the surrounding tissue are shown at lower magnification in (a) than in (b-c). Part of a blood vessel is visible to the right in (a). Arrows in (b) indicate p75 immunoreaction at the peripheries of the small structures that comprise the corpuscle. Black arrows in (a and c) indicate nerve fibers occurring within these small structures. There is a marked immunofluorescence reaction in (a) not only in these nerve fibers but also in approaching nerve fibers (white arrows).