Morphometric characteristics of choroid plexus epithelial cells in cases with significantly different psammoma bodies' presence.
OBJECTIVE
Taking into the consideration the fact that psammoma bodies have never been observed in stroma of any other organ as aging change, the aim of our research was to prove some structural similarities of choroids plexus and tumors psammoma bodies, and their possible connection with choroids plexus epithelial cells atrophy.


METHODS
We used 30 cadavers' right lateral ventricle central parts of choroid plexus as material. Tissue samples were routinely processed for the applied histochemical and immunohistochemical stainings. ImageJ software was used for morphometric analysis.


RESULTS
Cluster analysis showed the presence of two significantly different groups. The first group included the cases with sparse psammoma bodies and milder epithlelial atrophy with dome cells and vacuoles presence in older cases. The second group included the cases with numerous psammoma bodies and more severe epithelial atrophy, significant cystic formations and epithelial flattening presence, even in younger cases. Immunohistochemical analysis showed positive reaction of psammoma bodies and choroid plexus stroma on S100 protein. Application of S100 A8/A9 marker showed partial positive psammoma bodies' reaction and significant presence of S100 A8/A9 positive cells in choroid plexus blood vessels and stroma, especially, in cases with psammoma bodies' positive reaction on this marker.


CONCLUSIONS
So, presence of more numerous psammoma bodies' might be associated with more severe choroids plexus epithelial cells atrophy. Immunohistochemical analysis showed psammoma bodies' positive reaction on S100 protein and the presence of S100 A8/A9 positive cells in stroma of cases with psammoma bodies' positive reaction on this marker.
Department of Anatomy, Medical Faculty Nis, Dr. Zorana Djindjića 81, 18000 Nis, Serbia. ivanjov@junis.ni.ac.yu
Ivan
I
Jovanović
Sladjana
S
Ugrenović
Ljiljana
L
Vasović
Rade
R
Cukuranović
Nenad
N
Stoiljković
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000473:pathology*; D001284:Atrophy / Q000473:pathology; D002114:Calcinosis / Q000473:pathology*; D040501:Calgranulin A / Q000032:analysis; D040502:Calgranulin B / Q000032:analysis; D048429:Cell Size; D002831:Choroid Plexus / Q000737:chemistry / Q000473:pathology*; D004847:Epithelial Cells / Q000737:chemistry / Q000473:pathology*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged
D040501:Calgranulin A; D040502:Calgranulin B