The document describes the anatomy of the cervix. It discusses that the cervix is the inferior part of the uterus that connects to the vagina. It has several parts including the internal os, external os, endocervical canal, and ectocervix. The squamocolumnar junction marks the transition between the endocervix lined with columnar epithelium and the ectocervix lined with squamous epithelium. The cervix has muscular, fibromuscular, and secondary supports that help support the uterus. It discusses the blood supply, nerve supply, and lymphatic drainage of the cervix.

1. CERVIX
DR.G SAI SUNAYANA
DNB RESIDENT
RADIATION ONCOLOGY

2. ANATOMY OF CERVIX
cervix is inferior part of uterus which connects to
the vagina.

3. PARTS OF UTERUS

4. ANATOMY OF CERVIX
 PARTS OF UTERUS
 FUNDUS : superior part of uterus above the line joining the opening of fallopian tubes
 CORNU : part of uterus where fallopian tubes open into it
 BODY : middle portion of the uterus
 ISTHMUS : narrowest and inferior part of uterus
 CERVIX : lowest part of uterus which opens into vagina

5. ANATOMY OF CERVIX
 CERVIX : 3 cms in length and 2.5 cms in width
 It is in between uterine corpus and vagina
 The opening of cervix into uterus is INTERNAL OS
 The opening of cervix into vagina is EXTERNAL OS
 The part between the two openings is ENDOCERVICAL CANAL or ENDOCERVIX
 The part outside the external os is ECTOCERVIX

7. SQUAMOCOLUMNAR
JUNCTION
 Endocervix is lined by single
layer of columnar epithelium
 Ectocervix is lined by stratifies
squamous epithelium

8. TRANSFORMATION
ZONE CHANGES

9. RELATIONS OF CERVIX
 Based on the attachment of vaginal wall to
cervix
 It is divided into VAGINAL PART and
SUPRAVAGINAL PART

10. SUPRAVAGINAL PORTION

11. VAGINAL
PORTION
 Relations:
 Anteriorly : Anterior fornix of
vagina
 Posteriorly : Posterior fornix
 On each side : Lateral fornices

12. SUPPORTS OF
UTERUS

13. MUSCULAR
SUPPORTS
 PELVIC DIAPHRAGM: LEVATOR
ANI (pubococcygeus
puborectalis,iliococcygeus) and
Coccygeus

14. MUSCULAR
SUPPORTS
 PERINEAL BODY
 Confluence of the following
muscles
 BULBOSPONGIOSUS
 LEVATOR ANI
 EXTERNAL ANAL SPHINCTER
 SPHINCTER URETHRA
 SUPERFICIAL AND DEEP
TRANSVERSE PERINEAL
MUSCLES

15. MUSCULAR
SUPPORTS
 UROGENITAL DIAPHRAGMs
 Deep transverse perineal
muscle and sphincter urethra
along with inferior fascia

16. FIBROMUSCULAR SUPPORTS OF UTERUS
 CARDINAL LIGAMENT : Cervix to
posterolateral pelvic wall near the
origin of INTERNAL ILIAC ARTERY
and it contains UTERINE ARTERY
 UTEROSACRAL LIGAMENT: Cervix to
posterior pelvic walls and sacrum
and contain pelvic autonomic nerves
 PUBOCERVICAL LIGAMENT : Pubis
to anterior surface of cervix

17. FIBROMUSCULAR SUPPORTS OF UTERUS
 ROUND LIGAMENT OF UTERUS: It
arise from lateral aspect of corpus
just below and anterior to origin of
fallopian tube
 Homologous to gubernaculum
testes
 Extend laterally to pelvic wall and
enter retroperitoneal space , pass
lateral to inferior epigastric vessel
then through inguinal canal and
terminate in subcutaneous tissue of
labia majora

18. SECONDARY
SUPPORTS
 BROAD LIGAMENT:
 Double layers of peritoneum
extend from lateral wall of uterus
to pelvic walls
 Divided as mesosalphinx ,
mesoovarium mesometrium
infundibulopelvic ligament
 Cardinal and uterosacral
ligaments lie in lower portion of
broad ligament

19.  CONTENTS OF BROAD LIGAMENT:
 Fallopian tube
 Round ligament of uterus
 Ovarian ligament
 Uterovaginal plexus and ovarian plexus
 Lymphatics
 Fibroareolar tissue or parametrium

20. BLOOD SUPPLY OF
CERVIX
 Descending branch of uterine
artery
 ascending branch of vaginal
artery

21. NERVE
SUPPLY
OF
CERVIX

22. LYMPHATIC
DRAINAGE OF
CERVIX
 Drain principally into
PARACERVICAL and
PARAMETRIAL nodes
 Then into OBTURATOR ,
INTERNAL ILIAC,EXTERNAL ILIAC
and COMMON ILIAC NODES
 Finally into PARA AORTIC LYMPH
NODES

23. THANK YOU