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    • Pituitary Gland - Hyperplasia - Gallery

    Image of hyperplasia in the pituitary gland from a female Harlan Sprague-Dawley rat in a chronic study
    Pituitary Gland, Pars distalis - Hyperplasia in a female Harlan Sprague-Dawley rat from a chronic study. A small focus of hyperplasia (arrow) in the pars distalis is recognized by the paler staining cells.
    Image of hyperplasia in the pituitary gland from a female Harlan Sprague-Dawley rat in a chronic study
    Pituitary Gland, Pars distalis - Hyperplasia in a female Harlan Sprague-Dawley rat from a chronic study. Higher magnification of Figure 1 shows the focus of hyperplasia in greater detail.
    Image of hyperplasia in the pituitary gland from a female Harlan Sprague-Dawley rat in a chronic study
    Pituitary Gland, Pars distalis - Hyperplasia in a female Harlan Sprague-Dawley rat from a chronic study. Higher magnification of Figure 2 highlights the larger, paler staining cells in this focus of hyperplasia in the pars distalis.
    Image of hyperplasia in the pituitary gland from a female Harlan Sprague-Dawley rat in a chronic study
    Pituitary Gland, Pars distalis - Hyperplasia in a female Harlan Sprague-Dawley rat from a chronic study. Multiple focal areas of hyperplasia consisting of paler staining cells compared with the surrounding parenchyma are present in the pars distalis.
    Image of hyperplasia in the pituitary gland from a male F344/N rat in a chronic study
    Pituitary Gland, Pars distalis - Hyperplasia in a male F344/N rat from a chronic study. The focus of hyperplasia consists of paler staining cells (compared with the surrounding normal parenchyma) and dilated blood-filled vascular structures which are consistent with minimal to mild angiectasis.
    Image of hyperplasia in the pituitary gland from a male F344/N rat in a chronic study
    Pituitary Gland, Pars intermedia - Hyperplasia in a male F344/N rat from a chronic study. This example of hyperplasia of the pars intermedia (asterisk) is characterized by a circumscribed focus of cells with abundant amphophilic cytoplasm without compression of the adjacent normal parenchyma.
    Image of hyperplasia in the pituitary gland from a male F344/N rat in a chronic study
    Pituitary Gland, Pars intermedia - Hyperplasia in a male F344/N rat from a chronic study. Higher magnification of Figure 6 shows that the hyperplastic focus in the pars intermedia is characterized by a circumscribed collection of cells with abundant amphophilic cytoplasm without compression of the adjacent normal parenchyma.