First of all, I would like to express my prayerful thanks to GOD for everything.
I would like to express my deepest gratitude to Prof. Dr. Yakan Hussein Badawy, Head of Histology and Cytology Departement, Benha Faculty of Medicine. Zagazig Universi for his suggestion, supervision, support and encuoragement of this study.
I wish to express my thanks to Dr. Mohamed Magdi Zaki Sayed Ahmed, Lecturer of HIstology and Cytology. Benha
Faculty of
Medicine,
Zagazig University,
for
hIS
contlnuous
kind
help.
advice,
supervision,
and
encourag
ement
for
completing
this study.
Thanks to Dr.Assem Ahmed Abdel-Azim, Lecturer of Hlstologyand Cytology, Benha Faculty of Medicine, Zagazig UnlversIty. for hIS advice and encouragement.
Pinally. it is a great pleasure to acknowledge all the members of our department for theIr valuable cooperation and advice.
I
INTRODUCTION
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