Pathology Flashcards
Paraneoplastic Cushing’s syndrome is most commonly associated with which malignancies?
Small cell lung cancer
Acanthosis Nigricans is commonly appear with which malignancy?
Gastrointestinal malignancies
Kind of necrosis found in acute pancreatitis
Fat necrosis
3 clinical characteristics of PCO
- chronic anovulation (2ry amenorrheoa)
- hyperandrogegism (hirsutism, elevated LH, elevated free testosterone)
- necklace appearance in US
laboratory characteristics of PCO
- High LH
- High androgen
- hyperinsulinemia
- high antimullerian hormone
- low SHBG
Threshold of polycystic ovarian morphology (PCOM)
1.follicle number >20 (2-9mm)
2. Ovarian Vol >10ml
3. No corpus luteum, cysts or dominant follicle
Commonest endocrine condition to affect women
PCO 10-15%
the commonest epithelial ovarian tumor
Serous carcinoma
commonest ovarian germ cell tumor
cystic teratoma (dermoid cyst) ~ usually benign
Commonest malignant sex cord stromal tumor is
Adult type of granulosa cell tumor
Commonest ovarian tumors that can lead to torsion
Germ cell tumor
Commonest sites of endometriosis
- Ovaries
- Rectovaginal septum
3.pelvic peritoneum - laparotomy scars
the classical example of metastatic GIT neoplasia to the ovaries
Krukenberg tumor
Most common inherited bleeding disorder
Von Willebrand disease
Percentage of Cx cancer which are HPV related
99.7%
what is a complete mole?
Originates from fertilization of an empty ovum (has no chromosomes)
it will carry (paternal DNA only):
-Duplication of DNA of one sperm 90% -> 46XX
-Fertilization by 2 sperms 10% -> 46XX or 46XY
What is partial mole?
originates from fertilization of normal ovum by 2 sperms –> triploidy
69XXX, 69XXY, 69XYY
Partial Moles are misdiagnosed with
Hydropic Abortion and Complete mole
Gross picture of Complete mole
grape-like vesicles
Most common karyotype of Complete mole
46XX
GTN metastasises to
Lungs 80%
Pelvic organs
Brain
hCG status in GTD
Abnormal high hCG is the hall mark of GTD >100.000 IU/ml in the first 8 weeks
What is the incidence of hyperthyroidism in complete molar pregnancy?
3%
Low lying placenta
(less than 20mm from the cervix)
what is placenta previa?
placenta completely covering the cervix
What is Ovarian Theca lutein cyst?
commonly occurs in 25-60% of complete moles
in response to huge amounts of hCG secreted by proliferated cells
Placenta invaded through the full thickness of the myometrium.
Placenta Increta
How is obstetric cholestasis diagnosed?
when otherwise:
1. unexplained pruritus and
2. abnormal liver function tests (LFTs) and/or raised bile acids
occur in the pregnant woman and both resolve after delivery.
Percentage of pruritus in pregnancy
23% of pregnant women
when pruritus usually appears in pregnancy
in the 2nd half (3rd trimester- 80% after 30 weeks)
Risk factors of Obstetdriic cholestasis
- +ve family history 35%
- Estrogen
- Multiple pregnancy
- Carriage of hepatitis C
- Presence of gallstones
Obstetric cholestasis pruritus is characterized by
• it is typically worse at night.
• widespread and may involve the palms of the hands &r the soles of the feet.
What is dermatographia artefacta?
skin trauma from intense scratching may be seen in obstetric cholestasis
How should obstetric cholestasis be monitored?
• Once obstetric cholestasis is diagnosed, measure LFTs weekly until delivery.
• A coagulation screen should be performed.
• Postnatally, LFTs should be deferred for at least 10 days (In normal pregnancy, LFTs may increase in the first 10 days of the puerperium).
Maternal Risks with Obstetric cholestasis
- Vit. K deficiency
- Increase rate of CS
- Increase risk of postpartum hmge
Fetal Risks with Obstetric cholestasis
- stillbirth
- Intrapartum fetal distress
- Amniotic fluid meconium
- Preterm delivery
- Intrauterine fetal death
- Fetal intracranial haemorrhage
Causes of increased rates of placenta previa, accrete ..etc
d.t. rising rates of caesarean deliveries, increased maternal age and use of assisted reproductive technology (ART)
Incidence of Placenta Previa
1 in 200 Pregnancies
Placental villi adheres superficially to the myometrium without interposing decidua
Placenta Accrete
Placental villi penetrate deeply into the uterine myometrium down to the serosa
Placenta Increta
Placental villi perforates through the entire uterine wall and may invade the surrounding pelvic organs, such as the bladder.
Placenta Percreta
What is placental migration?
Apparent placental ‘migration’ following the development of the lower uterine segment during 3rd trimester of pregnancy results in the resolution of the low-lying placenta in 90% of the cases before term. This is less likely to occur in women with a previous caesarean delivery
Role of TVS in diagnosing Placenta previa
TVS for the diagnosis of placenta praevia or a low-lying placenta is superior to transabdominal and trans-perineal approaches, and is safe.
Endometrial thickness in reproductive age and premenopausal
5-14mm
Endometrial thickness in postmenopausal
4mm
The most common presentation of endometrial hyperplasia
Abnormal uterine bleeding.
This includes heavy menstrual bleeding, intermenstrual bleeding, irregular bleeding, unscheduled bleeding on hormone replacement therapy (HRT) and postmenopausal bleeding.
Risk of progression of endometrial cancer in hyperplasia without atypia
Less than 5% over 20 years
It will regress spontaneously during follow up
The main risk factor of endometrial hyperplasia
Unopposed estrogen exposure
Causes of skin pigmentation in pregnancy
Due to increase in estrogen, progesterone and melanocyte stimulating hormone levels.
Linea Nigra
a dark line on the abdomen, running straight down from the umbilicus, appears with pregnancy.
What is 2ry areola?
pigmented area around the 1ry areola appear during 5th month.
What is Melasma?
Brown, clearly defined patches on the face. Appear in forehead, malar distribution & cheekbones.
Occur in 75%, predominantly in 2nd or 3rd Trimester, Often persists for months & years postpartum.
Treatment of Melasma
Prevention: avoid of excessive sunlight exposure & use of
treatment is of a limited response like
(topical bleaching creams, hydroquinones (not licensed in
the UK), retinoids and steroids, as well as chemical peels,
laser treatments and dermabrasion)
###All of the above treatments are contraindicated in pregnancy.
broad-spectrum sunscreens.
Cause of Striae Gravidarum
Caused by rupture of the dermal elastic fibers that explains their
irreversible nature
Cause of spider navel In pregnancy
Occur due to increased estrogen that cause dilatation, congestion & proliferation of bl. vessels that can be seen on or through the skin.
What is ACUTE TELOGEN EFFLUVIUM
a generalised hair shedding with diffuse non-scarring alopecia, characteristically occurs 3–6 months postpartum.
When will pregnant woman recover from ACUTE TELOGEN EFFLUVIUM?
Generally, recovery is spontaneous and occurs within 9–12 months, and rarely does hair density fail to recover completely.
Sweat glands changes during pregnancy?
Increased eccrine gland secretions towards 3rd trimester can cause prickly heat (miliaria) and hyperhidrosis which contribute to pruritus.
What is Impetigo Herpetiformis?
A form of generalized pustular psoriasis. Pus-filled blisters begins in groins, underarms & folds of knees & elbows.
timing of impetigo herpetiformis
typically presents in 3rd Trimester & disappears after delivery.
Presentation of impetigo herpetiformis
Rash always accompanied by severe illness (chills, fever, vomiting, diarrhea, joint pains & lymphadenopathy).
The four dermatoses of pregnancy are:
– atopic eruption of pregnancy (AEP)
– pemphigoid gestationis,
– polymorphic eruption of pregnancy (PEP/PUPP)
– intrahepatic cholestasis of pregnancy (ICP
The only known effective TTT of intrahepatic cholestasis (obstetric cholestasis)
Ursodeoxycholic acid
decrease maternal pruritus & improve liver function & prognosis for the fetus.
Dose: 15 mg/kg/day (≈1 gm/d) as a single dose or in 2 divided doses
Other name of Obstetric cholestasis
Intrahepatic Cholestasis of Pregnancy ICP
Other medications needed in treatment of Obstetric Cholestasis
Vitamin K: Prevent clotting abnormalities dt. the hepatic effects of obstetric cholestasis.
Most common dermatosis in pregnancy
Atopic eruption of pregnancy
Characteristics of Rash in polymorphic eruption of pregnancy
Starts in Abdomen
Spares Umbilicus, face, scalp, palms and soles
Characteristics of Rash in pemphigoid gestationis
Starts from umbilicus and spread to whole body.
**remission and exacerbation are characteristics
atopic eruption is commonly associated with
Multiparous
(has no serious risk on pregnancy)
polymorphic eruption is commonly associated with
Primigravida
(has no serious risk on pregnancy)
pemphigoid gesationis is commonly associated with
Autoimmune conditions (grave’s dis. - IDDM)
(causes IUGR)
Is Intrahepatic Cholestasis of Pregnancy ICP associated with PPH?
True
When do you check LFTs postpartum, after ICP?
after 10 days (as biochemistry may worsen in the immediate postnatal period)
In treating ICP, What is the 2nd line after UDCA?
Rifampicin
The most common presentation of endometrial hyperplasia is
abnormal
uterine bleeding.
most common gynaecological malignancy in the Western world
Endometrial Cancer
How we perform Endometrial surveillance in case of End. Hyperplasia
endometrial sampling by outpatient endometrial biopsy (or by inpatient endometrial sampling, such as dilatation and curettage performed under general anaesthesia)
difference between End. hyperplasia and normal end. proliferation
Endometrial hyperplasia is defined as irregular proliferation of the endometrial glands with an increase in the gland to stroma ratio