ovarian tumours Flashcards
what are the three main subtypes of ovarian tumour
epithelial
germ cell
stromal/sex cord
what are the main types of epithelial ovarian tumour
serous mucinous endometrioid transitional (Brenner) clear cell
what are the main types of sex cord/stromal tumours
theca fibroma fibrothecoma sertoli cell leydig cell granulosa cell
what are the main types of germ cell ovarian tumour
teratoma dysgerminoma choriocarcinoma yolk sac embryonal
what is the commonest type of ovarian tumour
epithelial
what is commonest epithelial ovarian tumour
serous tumour
are serous ovarian tumour most commonly malignant or benign
benign (60%)
borderline (15%)
malignant (25%)
malignant serous carcinoma occurs in which age group
older patients
serous ovarian tumour are histologically similar to
normal fallopian tubal epithelium
how are serous ovarian tumours classified
benign: no cellular proliferation or invasion
borderline: cellular proliferation and minor nuclear atypia without invasion
malignant: cellular proliferation and nuclear atypia and stroll invasion
radiographic features of serous ovarian tumours
unilocular (single cyst)
homogenous
bilateral
psammomatous calcification
what features suggest malignancy over benign cystic neoplasia
large cystic mass thick irregular walls and septa papillary projections large soft tissue component ascites evidence of invasive spread or adenopathy
radiographic features of mucinous tumours
larger than serous
multilocular with small cystic components
calcification not very common
unilateral
endometrioid tumours tend to be benign/malignant
malignant
‘appearance of tubular glands and bears a strong resemblance to the endometrium’
endometrioid tumour
gross morphological appearance of endometrioid tumour
mass with solid and cystic areas
peak age for clear cell tumour
55 years
gross appearance of clear cell tumour
large unilocular cystic mass with protruding solid nodules
are clear cell tumours more likely to be benign or malignant
malignant
are mucinous tumours likely to be benign or malignant
benign
Brenner cell tumour re histologically similar to which other type of epithelium
urothelium (transitional)
radiographic features of Brenner tumour
multilocular cystic mass with solid component or mostly solid mass
usually small
often lack of invasion
calcification is common
are Brenner tumour mostly benign or malignant
benign
germ cell tumours are more common in which age group
children and adolescents
what is the commonest primary benign tumour of the ovary and commonest germ cell tumour
teratoma
what are the two main subtypes of teratoma
mature
immature
mature ovarian teratoma is also known as
dermoid cyst
teratomas are best assessed with which imaging modality
USS
clinical presentation of mature teratoma
tend to be asymptomatic
can predispose to ovarian torsion (acute pelvic pain)
what are the criteria of a teratoma
well-differentiated derivations from at least two of;
ectoderm
mesoderm
endoderm
how do teratomas appear on USS
cystic adnexal mass with some mural components
at which point is resection of mature teratoma recommended
7 cm
complications of mature teratoma
ovarian torsion
rupture
malignant transformation (SCC)
superimposed infection