HISTO: Gynae and breast Flashcards
What is the most common cervical cancer type?
SCC
What are the two transforming genes in HPV and what does each target?
E6 and E7
P53 and Rb respectively
What does the HPV vaccine do?
Prevents progression to Ca
What is the most common type of endometrial cancer?
Endometrioid - oestrogen dependent
What is grade of endometrioid cancer based on?
%glands and cytological atypia
What is the most common uterine tumour?
Leiomyoma
Which endometrial cancers arise in atrophic endometrium and are high grade?
Serous = p53
Clear cell = PTEN
What are the cancer genome atlas groups?
Type 1 - POLE mutations (highest survival)
Type 2 - MSI
Type 3- CN low
Type 4 - CN high (lowest survival)
What are the epithelial subtypes of ovarian tumours? What conditions are they associated with?
Serous, mucinous, endometrioid, clear cell, seromucinous, Brenner, mixed
BRCA1/2 and Lynch II/HNPCC
What is the most common ovarian cancer subtype? What mutation is it associated with?
Serous P53
low grade ones have KRAS/BRAF
What epithelial ovarian tumour is most associated with endometriosis?
Clear cell - MSI/PIK3CA
What % of endometrioid ovarian tumours are associated with endometriosis?
20%
What age group do most sex-cord stromal ovarian tumours occur in?
Post-menopausal
What do these mixed sex cord stromal tumours release:
- Thecoma
- Granulosa
- Sertoli-Leydig
- Fibroma
Thecoma –> oestrogen
Granulosa –> oestrogen
Sertoli-Leydig –> androgenic
Fibromas – X none
Which syndromes predispose to sex-cord stromal tumours?
DICER1 --> 60% of sertoli-leydig Peutz Jeghers (STK11) --> sertoli-leydig with annular tubules
What are the subtypes of stromal ovarian tumours?
Fibroma, thecoma, microcystic stromal (CTNNB1 -beta catetin positive)
What is an example of an ovarian sex cord tumour?
Granulosa cell (FOXL2)
What are germ-cell ovarian tumours graded based on?
Primitive elements
Which BRCA confers survival advantage? Why?
BRCA2 because PARP inhibitors can ve used (compared to BRCA 1 or negative)
What are Krukenberg tumours?
Bilateral mets to ovaries from gastric or breast origin
What is characteristic of Krukenberg tumours on histology?
Signet ring cells making mucin
What ovarian tumour are these markers of:
- Ca19-9
- CA125
- Inhibin
- beta-HCG
- AFP
Ca19-9 = mucinous CA125 = epithelial Inhibin = granulosa (sex cord stromal) Beta HCG = chroio or dysgerminoma AFP = immature teratoma, endodermal yolk sac
What types of tissue do Brenner tumours contain?
Urothelial like
What are the subtypes of Germ cell tumours?
Teratoma
Dysgerminoma
Choriocarcinoma
Summarise the main classes of ovarian tumours.
Epithelial
Sex cord stromal
Germ cell
Metastatic e.g. Krukenberg
Summarise the subtypes of sex cord-stromal tumours.
Sex-cord includes: granulosa
Stromal includes: fibroma, thecoma
Mixed includes: sertoli-leydig
What are the types of ovarian cysts?
Physiological- follicular, corpus luteal, theca luteal
Inflammatory - endometrioid
Germ cell - dermoid
Epithelial - serous/mucinous cystadenoma, Brenner tumour
Sex-cord stromal - fibroma, thecoma
Which cyst is Meig’s syndrome most common with?
Fibroma
What is Meig’s syndrome?
Effusion, ascites, fibroma
Which cyst is associated with pregnancy?
Theca luteal
Which cyst looks like ground glass on USS?
Endometrioma aka chocolate cysts
Which cyst can cause pseudomyxoma peritonei on rupture?
Mucinous cystadenoma
What does coding with these letters in breast pathology mean: C M U B
C = cytology coding M = clinical coding U = radiology coding B = core biopsy coding
Summarise the cytology coding for breast tissue.
C1 = inadequate; C2 = benign, C3= atypia/benign, C4 = suspicious, C5= malignant
Summarise the core biopsy coding for breast tissue.
B1= normal; B2= benign; B3= uncertain; B4= suspicious; B5 = malignant
B5a=DCIS
B5b=invasive carcinoma
What does this describe?
“Monolayer sheet of myoepithelial cells on FNA, well circumscribed”
Fibroadenoma = proliferation of fibrous tissue
What is a Phyllodes tumour?
Malignant fibroepithelial tumour with cellular dense stroma and mitosis
Which age group is most affected by Phyllodes tumours?
> 50yrs
How are intraductal papillomas managed?
Should be excised
How do intraductal carcinomas present based on location? Which age group are these seen in ?
Central - discharge
Peripheral - silent
Occurs in 40-60yo
What does this describe?
“Stellate on mammogram, central scarring with peripheral glandular proliferation”
Radial scar
What happens if a radial scar is left undisturbed?
Will progress to tubular carcinoma
What are the two main types of proliferative breast disease? Which has the higher risk of progression to cancer?
Usual epithelial hyperplasia
Flat epithelial hyperplasia - higher risk of atypical ductal carcinoma
Name 2 in-situ breast tumours. What is their risk of progression to carcinoma?
In situ lobular neoplasia - x10 risk
Ductal carcinoma in situ - small risk but still excised
Which tumour is most often detected as areas of calcification on mammography or as lump/discharge/eczema of the nipple?
Ducal carcinoma in situ
What is eczema of the nipple called?
Paget’s
What is the most common breast carcinoma?
Ductal invasive carcinoma
What breast carcinoma presents with prominent lymphocytic infiltrate and central necrosis?
Basal-like
Which breast carcinoma is associated with BRCA?
Basal-like carcinoma
How do basal-like carcinomas spread?
Vascular, often distant, spread
What are the 3 categories used to grade basal-like carcinomas?
Tubule formation
Nuclear pleomorphism
Mitosis
(each is scored out of 3)
What does ER/PR/Her2 positive/negative mean in terms of prognosis? Which is best?
ER/PR+ = good Her2 = bad
What is the most important factor for prognosis in breast cancer?
Status of axillary lymph nodes
Which breast cancer is “triple negative”?
Basal-like carcinoma
What is the histopathology of gynaecomastia?
Epithelial hyperplasia
Which ovarian tumours are strongly positive for beta-catetin?
Microcystic stromal tumours - CTNNB1
Which breast change occurs due to imbalances in progesterone and oestrogen?
Fibrocystic disease - some calcification on mammogram but benign on histopathology
Name 2 benign breast lesions that commonly mimic breast cancer on radiology.
Fat necrosis
Radial scar