Anatomical observations of the development of the pituitary capsule

1980 ◽  
Vol 52 (5) ◽  
pp. 667-670 ◽  
Author(s):  
Je G. Chi ◽  
Myung Ho Lee

✓ A morphological study on the development of the pituitary capsule is reported, based on serial or step-sections of 56 pituitary glands from human embryos and fetuses ranging in gestational age from 4 to 40 weeks. Formation of the pituitary capsule is preceded at a very early embryonic stage by mesenchymal cell proliferation around Rathke's pouch when it forms the primitive adenohypophysis. The proportionally large adenohypophysis wraps around the neurohypophysis as it grows down from the diencephalon. Therefore, the fibrous capsule around the adenohypophysis represents the whole hypophysis as a membrane distinct from the dura mater or pia arachnoid membrane. The pituitary capsule appears not be to a derivative of either the dura mater or the pia arachnoid; instead it is a separate covering of the developing Rathke's pouch.

1956 ◽  
Vol 14 (1) ◽  
pp. 66-77 ◽  
Author(s):  
J. D. BOYD

SUMMARY A derivative of the pharyngeal extremity of Rathke's pouch, with structural features closely resembling those of the adenohypophysis, was found in fifty-three human embryos and foetuses. This pharyngeal hypophysis grows during prenatal life and usually possesses a rich vascularization. In silver impregnated material nerve fibres derived from branches of the spheno-palatine ganglion could be followed into the pharyngeal hypophysis. The recorded findings and a survey of the literature suggest that the pharyngeal hypophysis is constantly present in man, and that its cells can differentiate, as do those of the adenohypophysis.


1976 ◽  
Vol 45 (1) ◽  
pp. 101-103 ◽  
Author(s):  
Carl L. Scholtz ◽  
Kevin Siu

✓ A case is described in which a pigmented tumor occupied the pituitary fossa with a large suprasellar extension. Its histological and ultrastructural appearances resembled those of a melanoma. The origin of the tumor is discussed with particular reference to Rathke's pouch.


1978 ◽  
Vol 186 (1) ◽  
Author(s):  
Masataka Shiino ◽  
Hiroshi Ishikawa ◽  
EdwardG. Rennels

2019 ◽  
Vol 92 ◽  
pp. 18-26 ◽  
Author(s):  
Jill P.J.M. Hikspoors ◽  
Nutmethee Kruepunga ◽  
Greet M.C. Mommen ◽  
Jean-Marie P.W.U. Peeters ◽  
Cindy J.M. Hülsman ◽  
...  

2010 ◽  
pp. OR38-3-OR38-3
Author(s):  
Carles Gaston-Massuet ◽  
Cynthia L Andoniadou ◽  
Massimo Signore ◽  
Sajutha Jayakody ◽  
Nicoletta Charolidi ◽  
...  

2020 ◽  
Vol 229 ◽  
pp. 151467 ◽  
Author(s):  
Shogo Hayashi ◽  
Ji Hyun Kim ◽  
Kwang Ho Cho ◽  
Gen Murakami ◽  
Jörg Wilting ◽  
...  

1991 ◽  
Vol 74 (5) ◽  
pp. 709-714 ◽  
Author(s):  
Hiroaki Sakamoto ◽  
Akira Hakuba ◽  
Ken Fujitani ◽  
Shuro Nishimura

✓ In a series of 75 patients with surgically treated lipomyelomeningoceles, the neurological condition of six patients deteriorated 6 months to 14 years after the operation due to repeat tethering of the spinal cord. The tethering resulted from postoperative dense adhesion between the cord and the overlying dura mater. Two of the six patients underwent conventional repeat untethering procedures, and the remaining four were successfully treated with a new surgical technique developed by the authors to prevent such dural adhesion. For this procedure, after complete untethering of the spinal cord, the lumbosacral cord is retained in the center of the dural sac by fine stay sutures between the pia mater of the conus medullaris and the ventral dura mater. In addition, the dura mater is tacked to the posterior arch which is reconstructed with bone grafts at one or two bifid vertebral levels. During a postoperative follow-up period of 1 to 3 years, no further deterioration has been observed and magnetic resonance studies have demonstrated a space filled with cerebrospinal fluid (CSF) around the lumbosacral cord. The authors conclude that long-term observation, both neurological and radiological, is essential even after successful repair of a lipomyelomeningocele. This new surgical procedure can maintain a CSF bath around the lumbosacral cord, thus preventing dural adhesion. Application of this technique will hopefully be beneficial in lipomyelomeningocele patients with a high risk of cord retethering after initial repair.


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