scholarly journals Folliculostellate cells in pituitary pars distalis of male viscacha: immunohistochemical, morphometric and ultrastructural study

2010 ◽  
Vol 54 (1) ◽  
pp. 1 ◽  
Author(s):  
M. Acosta ◽  
V. Filippa ◽  
F. Mohamed
Keyword(s):  
Ultrastructural Study ◽  
Pars Distalis ◽  
Folliculostellate Cells

Immunohistochemical and Ultrastructural Study of Pituitary Folliculostellate Cells during Aging in Rats

2000 ◽  
Vol 167 (1) ◽  
pp. 25-32 ◽  
Author(s):  
G.M. Cónsole ◽  
S.B. Jurado ◽  
F.L. Riccillo ◽  
C.L.A. Gómez Dumm
Keyword(s):  
Ultrastructural Study ◽  
Folliculostellate Cells

Cytological, Immunocytochemical and Ultrastructural Study of GH Cells of Pars Distalis Adenohipophysaria of Kids (Capra hircus)

1989 ◽  
Vol 18 (2) ◽  
pp. 165-176 ◽  
Author(s):  
M. A. Gomez ◽  
J. A. Navarro ◽  
P. Camara ◽  
J. Sanchez ◽  
M. A. Sierra ◽  
...  
Keyword(s):  
Ultrastructural Study ◽  
Capra Hircus ◽  
Pars Distalis ◽  
Gh Cells

scholarly journals Differential distribution of S-100 protein and vimentin in the hypophyseal pars tuberalis of the guinea pig.

1996 ◽  
Vol 44 (5) ◽  
pp. 501-510 ◽  
Author(s):  
Y Kameda
Keyword(s):  
Fetal Development ◽  
Large Cell ◽  
Immunohistochemical Localization ◽  
Pars Tuberalis ◽  
Pars Distalis ◽  
Differential Distribution ◽  
Folliculostellate Cells ◽  
Cell Groups ◽  
S 100 ◽  
Late Stages

In the hypophyseal pars tuberalis of guinea pigs, I examined immunohistochemical localization and development of vimentin and S-100 protein in comparison with those of the pars distalis. In the pars distalis, almost all folliculostellate cells expressed intense immunoreactivity for vimentin. A subpopulation of vimentin-immunoreactive folliculostellate cells was also immunoreactive for S-100 protein. During fetal development, vimentin-immunoreactive cells appeared at mid-gestation in the pars distalis and became numerous at late stages, whereas only a few S-100 immunoreactive cells were observed even at late stages. In the pars tuberalis, a large number of vimentin-immunoreactive cells were distributed in the cranial region surrounding the median eminence and the dorsocaudal region surrounding the infundibular stalk. These cells, however, were sparse in the ventrocaudal region in continuity with the pars distalis. Conversely, dense distribution of S-100 immunoreactive cells was restricted in the ventrocaudal region. Vimentin-immunoreactive cells were elongated and were mostly distributed as solitary cells, whereas S-100 immunoreactive cells were gathered in large or small cell groups and frequently formed colloid-containing follicles. During fetal development, large cell groups immunoreactive for S-100 protein were detected at late stages in the ventrocaudal region. Therefore, in the pars tuberalis S-100 immunoreactive cells are distinct from the vimentin cells and do not correspond to the folliculostellate cells of the pars distalis.

Cytological, Immunocytochemical and Ultrastructural Study of the Adenohypophyseal Pars Distalis of the Kid (Capra hircus): The TSH cell

1989 ◽  
Vol 18 (4) ◽  
pp. 305-315
Author(s):  
M. A. Gomez ◽  
J. A. Navarro ◽  
S. Gomez ◽  
P. Camara ◽  
J. C. Gomez ◽  
...  
Keyword(s):  
Ultrastructural Study ◽  
Capra Hircus ◽  
Pars Distalis

Tumor Diagnosis

1982 ◽  
Vol 40 ◽  
pp. 262-265
Author(s):  
Bruce Mackay
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Differential Diagnosis ◽  
Light Microscopy ◽  
Clinical Examination ◽  
Ultrastructural Study ◽  
Diagnostic Procedures ◽  
Specific Diagnosis ◽  
Transmission Electron ◽  
Microscopic Diagnosis

The broadest application of transmission electron microscopy (EM) in diagnostic medicine is the identification of tumors that cannot be classified by routine light microscopy. EM is useful in the evaluation of approximately 10% of human neoplasms, but the extent of its contribution varies considerably. It may provide a specific diagnosis that can not be reached by other means, but in contrast, the information obtained from ultrastructural study of some 10% of tumors does not significantly add to that available from light microscopy. Most cases fall somewhere between these two extremes: EM may correct a light microscopic diagnosis, or serve to narrow a differential diagnosis by excluding some of the possibilities considered by light microscopy. It is particularly important to correlate the EM findings with data from light microscopy, clinical examination, and other diagnostic procedures.

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