Wyniki wyszukiwania

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Endothelial progenitor cells populate the stromal stem niche of tympanum

100%

Rusu M. C., Manoiu V. S., Popescu V. M., Ciuluvica R. C.

Folia Morphologica

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2017

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tom 76

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nr 4

The tympanic membrane (TM) integrity is of utmost importance for the sense of hearing. Therefore, the intrinsic potential of the TM to regenerate and repair deserves complete characterisation. Existing studies brought evidence on the epithelial stem niche of the TM. However, the stromal compartment was not evaluated for harbouring a distinctive stem, or progenitor, niche. We aimed doing this in transmission electron microscopy. We used TMs dissected out from 3 male Oryctolagus cuniculus rabbits. Evidence of stromal quiescent stem cells was gathered. Moreover, endothelial progenitor cells were found in the TM, being accurately identified by two specific ultrastructural markers of the endothelial lineage: the Weibel-Palade bodies and the stomatal diaphragms of the subplasmalemmal caveolae. The stromal stem niche of the TM appears to be a distinctive contributor during physiological and pathological processes of the TM, such as cholesteatoma formation, at least as a biological support for processes of vasculogenesis. However, further characterisation of the molecular pattern of the stromal stem niche of the TM is mandatory. (Folia Morphol 2017; 76, 4: 630–634)

2

Anatomic variation of alveolar antral artery

100%

Ilie O. C., Ciuluvica R. C., Rusu M. C.

Folia Morphologica

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2015

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tom 74

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nr 2

The alveolar antral artery (AAA) was unanimously encountered in a few available studies with an intraosseous course to anastomose with the infraorbital artery. We report here two cases in which dissection revealed an extraosseous placement of this artery, between the lateral wall of the maxillary sinus and the Schneiderian membrane. The frequency of occurrence of the intraosseous anastomosis should be so modified from 100% to < 100%. This arterial course over the Schneiderian membrane is important during surgical procedures: if it is identified preoperatively it can be avoided, or ligaturated, if not, it may be accidentally severed and uncomfortable haemorrhage may disturb the surgical procedure. In the first case reported here hybrid morphology of the AAA was also found, demonstrating that arterial anatomy should be considered with caution, on a case-by-case basis. (Folia Morphol 2015; 74, 2: 192–194)

3

Bilateral giant and unilateral duplicated sphenoidal tubercle

76%

Rusu M. C., Ciuluvica R. C., Vrapciu A. D., Chirita A. L., Predoiu M., Maru N.

Folia Morphologica

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2019

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tom 78

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nr 4

The sphenoidal tubercle (SphT), also known as pyramidal tubercle or infratemporal spine projects from the anterior end of the infratemporal crest of the greater sphenoidal wing. As it masquerades the lateral entrance in the pterygopalatine fossa it could obstruct surgical corridors or the access for anaesthetic punctures. The SphT is, however, an overlooked structure in the anatomical literature. During a routine cone beam computed tomography study in an adult male patient we found bilateral giant SphTs transforming the infratemporal surfaces of the greater wing into veritable pterygoid foveae. Moreover, on one side the SphT appeared bifid, with a main giant partition, of 9.17 mm vertical length, and a secondary laminar one. The opposite SphT had 14.80 mm. In our knowledge, such giant and bifid SphTs were not reported previously and are major obstacles if surgical access towards the pterygopalatine fossa and the skull base is intended. (Folia Morphol 2019; 78, 4: 893–897)

Ograniczanie wyników

3 Folia Morphologica

3 Ciuluvica R. C.

3 Rusu M. C.

1 Chirita A. L.

1 Ilie O. C.

1 Manoiu V. S.

1 Maru N.

1 Popescu V. M.

1 Predoiu M.

1 Vrapciu A. D.

1 2019

1 2017

1 2015

Endothelial progenitor cells populate the stromal stem niche of tympanum

Anatomic variation of alveolar antral artery

Bilateral giant and unilateral duplicated sphenoidal tubercle