Path Flashcards
What are the 6 most clinically relevant gram positive bacteria?
Hint: two cocci, four bacilli
Cocci
-Staph
-Strep
Bacilli (rods)
-Non-sporeformers: Corynebacterium diptheriae, Listeria monoctyogenes
-Spore-formers: Bacillus sp., Clostridium
What are the rest of medically relevant bacteria (not gram +)?
Gram -
Ex: Syphillus (Treponema palledum): Dark field microscopy, inclusion stains
E. coli
Special staining
In terms of organisms, which of the following tend to cause the majority of salient diseases? A) Bacteria B) Viruses C) Fungi D) Parasites E) Prions
A and B!
What are the most clinically relevant organisms as related to salient categories/types of infx, issues related to acquisition, and gender?
-Staph (TSS tampons)
-Bacterial UTIs (females): E. coli
-Non-specific urethritis (NGU): purulent Chlamydia, Ureaplasma urealyticum, S. saprophyticus
-Vaginitis:
Bacterial=Gardnerella vaginalis
Fungal=Candida
Parasitic protozoan=____________
-Prostatitis
-Gonorrhea in men=purulent d/c–>epididymus hurts…risk of septic arthritis
-Gonorrhea in women=purulent d/c or asympt–>fallopian tubes–>infertility or septic arthritis
-Common STDS:
MC chlamydia (NGU, PID)
Gonorrhea (PID)
Syphilis
HSV
HIV
-Uncommon STDS:
Hemophilus decreyi: chancroid
Chlamydia: lymphogranuloma venereum
Klebsiella granulomatis: granuloma inguinale
-Enterococcus: hospitals
Trichomoniasis
20 yo female presents w/ fever, high WBC w/ left shift, diffuse suprapubic pain, left lower back pain. Dysuria
Dx? Primary infection?
Bacterial infection of the bladder
MC E. Coli
(left shift=incr neuts=bacterial)
Microorganisms–>Dz
1) Microbial flora: coexist, may–>infx
2) Pathogenic, non-commensal (small or large dose–>dz)
Routes of Entry:
1) Epithelial surface
2) Inhalation
3) Ingestion
4) Sexual transmission
Respiratory, GI, GU infx caused by ______ mircoogranisms that can penetrate epithelium
virulent
Urine is sterile….anatomy=role in risk of UTI (women>men)…Obstruction or flow or reflux compromises normal defenses and increases susceptibility to urinary tract infxs…
Ex?
- BPH
- Uterine prolapse
- Antibiotics can kill the lactobacilli and allow overgrowth of yeast–>_________
- Minor trauma (sex)–>expose immature prolif epithelial cells susceptible to infx by HPV
candidiasis
Host defense: urination
Breach: obstruction, microbial, attachment, local prolif
Ex?
E. coli
Host defense: normal vaginal flora
Breach: Antibiotic use
Ex?
Candida albicans
Host defense: normal vaginal flora
Breach: Microbial attachment and local prolif
Ex?
N. gonococcus
Chlamydia
Host defense: intact epidermal/epithelial barrier
Breach: direct infx/invasion
Ex?
Herpes (MC ulcerating dz in world)
Syphilis
Host defense: intact epidermal/epithelial barrier
Breach: Local trauma
Ex?
STIs including HPV, HIV
Dx?
- Bacitracin resistant, B hemolytic, colonizes vagina, causes pneumonia, meningitis, and sepsis mostly in BABIES
- screen preg women at 35-37 wks
- if + give penicillin
Group B strep
B=babies
Meningitis/meningoencephalitis syndromes….setting/ages w/ organisms?
- Listeria, E. Coli, Group B strep (neonates)
- Consider N. meningococcemia (kids/young adults…petechial rash, waterhouse friderichsen syn)
- H. influenza type B (+ epiglotittis)
Gonorrhea in infants? children?
Infants: conjunctivitis
Children: abuse!
Eye infx in infants and older children?
Chlamydia
risk–>blindness
Fetal calcifications in the brain?
Cytomegalovirus
Toxoplasma gondii
(vertical transmission mom–>baby)
Chanker not painful
Collapsed nose
Blind
Deaf
Congenital syphilis
Uveitis
Arthritis
Conjunctivitis
Reiter’s syndrome (youths male)
Monoarticular, septic arthritis in sexually-active young person?
Gonorrheal gram - diplococci
Aplastic anemia?
Parvovirus, B19
- infx during 1st trimester
- heart malformations
- mental retardation
- cataracts
- deafness
Rubella
Placental-fetal transmission
(third tri little effect)
-Transmission during birth includes what key examples?
Herpes, gonococcal, chlamydia conjunctivitis
-Postnatal transmission in maternal milk includes…?
CMV, HIV, HBV
TQ
- Cervical dysplasia and cancer (F)
- Vulvar cancer (F)
- Cancer of the penis (M)
- Condyloma acuminatum (M/F)
Dx?
HPV
acuminatum (HPV 6 and 11….no SCC…see koilocytosis….16 and 18–>SCC)
TQ -Urethritis, cervicitis, salpingitis, PID (F) -Urethritis, epididymitis, proctitis (M) -Lymphogranuloma venerum (M/F) Dx?
Chlamydia trachomatis
resurgence due to co-infx with HIV
TQ
- Cervicitis, endometritis, salpingitis, infertility (F)
- Epididymitis, prostatitis (M)
Dx?
Neisseria gonorrhea
- Chanker not painful
- No inflamed inguinal LN
Syphilis (T. pallidum)
- Painful chanker
- Inguinal LN swollen
Chancroid (H. ducreyi)
also painful in herpes!
- Chanker not painful
- Inguinal LN swollen
- strictures/fibrosis
Granuloma inguinale (Klebsiella granulomatis)
- Urethritis, balanitis (penis)
- Vaginitis (F)
- Greenish d/c, mobile protozoa
Trichomonas vaginalis
- Causes skin infx in immunosupp–>endocarditis
- Can become resistant–>flesh eating
Staph
- Causes pharyngitis–>PSGN
- MC community acquired pneumonia (esp in elderly)
Streptococcus
What is included in dx of ulcerating lesions of genital/inguinal region?
NOT limited to GI or STDs!! (Bubonic plague=Y. pestis), francisella tularensis
Herpes, syphilis (USA),
Chancroid, G. inguinale, L. venerum (non-USA)
What dxx includes…
Dysuria
Urgency
Frequency
- Chlamydia
- Gonorrhea
- Ureaplasma urealyticum
- S. saprophyticus
Dx of
Syphilius vs CMV vs HSV on slide
Syphilis: Dark-field micro, inclusion stains
CMV: intranuclear + cytoplasmic inclusions
HSV: Intranuclear, multinucleated
CMV transmission?
- Transplancental
- Neonatal (breastmilk)
- Saliva (day care)
- Genital route (15 yo)
HIV:
- AIDS….who is at greatest risk of infx?
- HIV is a non-transforming virus and is replicates via…
Notes:
Sex=dominant mode of HIV infx worldwide, semen–>abrasions in rectum/oral mucosa–>infx of CD4 cells….AIDS also infects B cells
Can also target CNS--enceph Phases: 1) Acute retroviral syn 2) Asymptomatic/chronic 3) Clinical AIDS
Men having sex w/ men
Reverse transcriptase
Has subgroups and clades
What are some AIDS-defining opportunistic infections and neoplasms found in pts w/ HIV?
Protozoa/helminth:
Cyptosporidiosis, pneumocystosis, toxoplasmosis
Fungal: candida, cryptococcus, disseminated coccidioidomycosis and histoplasmosis
Bacterial: Mycobacterium, nocardia, salmonella)
Viral: CMV, HSV, Varicella
Neoplasms: Kaposi, primary lymphoma of brain, invasive cancer of cervix
32 yo male presents with sore throat, chronic diarrhea, and rt-sided painful rash….He thinks its the “flu that never went away”. Lost wt. Fever. Oral candidiasis. Lower CD4 counts 480.
Dx?
Chronic HIV infx
Not acute: diffuse lymphadenopathy
Not AIDS: multiple neoplasms with CD4 less than 200
37 yo white female complains of dyspareunia (pain with sex). Vulva/vagina ok but cervical erythema w/ focal, superficial erosions. Ki-67 positiove and p16.
Dx?
HPV (cervicitis, erosions)
NOT gardnerella b/c that would have vaginal pain
TQ
T/F
HPV is a transforming virus
TRUE–>SCC
HPV-16 and 18
TQ
37 yo female has a low grade lesion. This reflects HPV infx which cells of the cervix?
IMMATURE, BASILAR SC
(NOT mature!!)
Basil prolif=malignant….CIN III=carcinoma in situ
Cervical transition zone MC b/c immature basil prolif occurs here
What are the 2 routes for placental infections?
1) ascending through birth canal (MC)–>infx of membrane–>rupture–>preterm delivery
2) Hematogenous (transplancental)…ex?
TORCH Toxoplasmosis Others (syphilis, TB, listeria) Rubella CMV HSV
24 yo female complains of genital pain. Painful ulcerative lesino on left labia. Hx indicates sexual contact 4 days prior…
Dx?
What should it look like on smear?
HSV
Multinucleated syncytia w/ bluish intranuclear inclusions
Remember: granoluma inguinale and T. pallidum NOT painful
19 yo pregnant female. Distress. Cervix effaced/dilated. Membranes ruptured and amniotic fluid turbid w/ purulent exudates. SGA female infant 25 wks–>intubate. Cultures show TORCH…Which of the following is most likely
A. Toxo B. CMV C. Syphilis D. Listeria E. Rubella
D. Listeria!
A and B) mom–>pre-labor calcifications in brain
C) teeth, deaf, blind
E) early in pregnancy
- pelvic pain + adnexal tenderness + fever + d/c
- Common causes?
PID
- Chlamydia
- Post-abortion/abnormal devliery (puerperal infx)
- Gonococcus: 2 to 7 days after vaccination
29 yo female seeks fertility consult. Been married 4 years and cannot conceive. Hx indicates sexual activity from early teens w/ multiple partners...Hysterosalpinogogram shows contrast media penetrating only a short distance laterally in both tubes...Most likely which of the following? A) Antecedent ectopic preg B) HPV 16, 18 C) Chlamydia D) Neisseria E) Herpes
C) chronic salpingitis (PID)–>infertility
MC cause of urethritis?
NGU! Chlamydia (also PID)
and ureaplasma urealyticum
17 yo female complains of significant vagina pain and itching…Insulin-dependent diabetes…vulvovaginal erythema w/ curd-like whitish discharge…
Dx?
Candida albicans (immunocomp.)
N. gonorrhea (purulent)
Trichomonas (green)
Chlamydia (asympt + serous d/c)
22 yo female in ED, shock, abd pain, diffuse lower abd pain w/ rebound (peritonitis). Purulent cervical d/c. Left knee swollen and red…Dx PID complicated by peritonitis/sepsis and suspect tubo-ovarian abscess…
Dx?
Neisseria
Septic arthritis!
A 17 G1P1 delivers male infant at 27 wks. SGA w/ desquamative rash of palms and soles…Vomer of nose flat and legs bowed. Hepatic transaminases elevated. Diffuse hepatocellular damage w lymphoplasmacytic infiltrates and focal obliterative endarteritis. Consult ophthalmology and audiology.
Dx?
Treponema pallidum
def/blind–>chronic hep
- Inflammatory lesions of Bartholin glands may produce cysts.
- They are tubuloalveolar glands that produce mucin
- Contain watery or thick mucoid fluid, and / or become infected with what organism?
Gonorrhea! (gram-neg diplococci)
When they heal, expect a cyst
- Chancroid of the vulva
- Gram-neg coccobacillus
Haemophilus ducreyi
- Changes in inflammatory reaction
- Intracytoplasmic diplococci
- Background of lactobacilli
Gonorrhea
- Purulent discharge of cervix
- Clear swollen cells
Chlamydia
- small pearly papules with central depression of the vulva
- white cheesy material
- painless/itchy lesions that may become inflamed, red, and swollen
- pox virus inclusions (cup shaped with glassy nuclei pushing the nuclei to periphery)
Molluscum contagiosum
Molluscum bodies=inclusions
- Tzank prep w/ papanicolaou stain
- Three M’s:
1) moulding of nuclei
2) margination of chromatin
3) multi-nucleated giant cells w/ ground glass nuclei (central viral inclusions)
Herpes
Do a C section if preg
TQ
- Histo: koilocyte (wrinkled nucleus)
- Vulva: warts, intra-epithelial neoplasia, carcinoma
HPV
chondyloma accuminata
Low risk=6, 11
High risk=16, 18
TQ
- most common lesion on the vulva
- band of loose, pale-staning, collagen forms underneath the epidermis
- Thinning of epidermis and fibrosis of dermis, hyperkeratosis, loss of rete ridges, dermal edema
- **White scales, tissue paper appearance….gray and parchment-like or cigaret-paper-like and becomes itchy
- Benign, but few percent turn malignant→SCC
- Can cause leukoplakia (among other things)
Lichen Sclerosis (aka “chronic atrophic vulvitis”)
- Fungal infection of the vulva?
- see hyphae
Candida
- nonspecific condition resulting from rubbing and scratching of the skin.
- Looks “like” leukoplakia. Vulva looks pink‐red like some one scratched it. Not premalignant.
- Hyperplasia of the epidermis, thickening of the epidermis and hyperkeratosis
Squamous cell hyperplasia
TQ
What stage of syphilis?
-Separated, papular white lesions around vulva (wartlike)
-Rash on hands and feet
-Stromal fibrosis, squamous hyperplasia, chronic inflam., PLASMA CELL infiltrate
Secondary syphilis
(condyloma latum)
Reminder: syphilis=Treponema pallidum, a spirochete.
What stage of syphilis?
-Chancre on vulva
How do we visualize?
Primary syphilis
Dark field micro, warthin-starry silver stain, immunofluorescence
TQ
- White raised papules on vulva (papillary)
- branching fibrous stalk with a thickened epithelium
- Hyperkaratosis
- Parakaratosis
- Koilocytic atypia→koilocytic cells with dark/hyperchromatic, wrinkled nuclei (from all those extra copies of the viral genome) and a perinuclear clear zone (halo)
Condyloma acuminatum (HPV 6, 11)
- Most common BENIGN tumor of vulva
- Presents as an ulcerated and bleeding nodule
- Originates from exocrine sweat glands
- Intraductal papilloma of the breast, only in the vulva along the embryonic milk line
Papillary Hidradenoma
- mucin-rich clear cells in the epidermis of the vulva or perineum with prominent nuclei/nucleoli
- Gross sharply demarcated red, itchy, moist, crusted/ulcerated skin lesion
- usually no underlying cancer
- Cells: PAS +, Keratin +
Extramammary Paget’s disease
pagets of vulva→ usually no underlying cancer
Differential dx of extramammary Paget’s disease?
Carcinoma vs melanoma
- why melanoma? Malig population present in epidermis→ can also occur in vulva…make a distinction: is this carcinoma (pagets) or melanoma→ DO STAINS!
- Paget cells: PAS +, Keratin +, and S100 –
- Melanoma: PAS-, Keratin -, S100 +
TQ
-Presents as leukoplakia→ have to biopsy to distinguish
- Basaloid and warty, caused by HPV 16→ preceded by dysplasia [VIN (vulvar intraepithelial neoplasia)] and carcinoma in situ. Young pts
- not caused by HPV →arise in long standing lichen sclerosis or idiopathic hyperkeratosis (these are more aggressive). Older people usually
Squamous Cell carcinoma
- residual glandular/columnar epithelium under the squamous epithelium in the upper vagina
- Risk of adenocarcinoma
- Assoc w/ hx of DES exposure
Vaginal adenosis
- Inclusion cysts in wall of vagina
- Wolffian duct remnants
Gartner duct cysts
- Nondysplastic
- Noncondylomatous
- No Koilocytic atypia
Squamous papilloma
-mature squamous epithelium overlying the benign appearing fibrovascular core
Fibroepithelial polyp
skin tags
- Primary carcinoma of vagina
- Invasive
- Precursor lesion=vaginal intraepithelial neoplasia (VAIN) (low or high grade)
Ex: high grade vaginal intraepithelial neoplasia (incr epidermis and atypia)
Squamous cell Ca due to HPV 16, 18
TQ
- MC vaginal sarcoma
- Presents as bleeding and BUNCH OF grapes that protrude from vagina! Usually in girls
Embryonal Rhabdomyosarcoma (Sarcoma Botryoides)
What is the transformation zone?
Where the columnar epithelium of the endocervix meets the squamous epithelium of the ectocervix
What screen?
- Endometrial cells in woman >40 yo
- Epithelial cell abnormalities (atypical SC (ASC-US)), LSIL, HSIL, SCC
- Glandular cell abnomralities (atypical endocervical cells)
- Obtain the smear two weeks after the first day of the last menstrual periodo
- PAP smear is gold standard for screening→ scrape away cells from transition zone→ look for dysplasia (high N:C ratio), dark, hyperchromatic nucleus
- Pap smear is good to detect SCC and precursor lesions
- Clue cells (fuzzy) in flora
- Vaginal pH is more alkaline (above 4.5)
-Bacterial vaginosis due to Garderella
- Lactobacilli produce lactic acid which maintain the pH below 4.5. An alkaline pH is bad!!!
- Infections may cause acute or chronic cervicitis causing reparative and reactive changes to appear in the PAP smear
- bad-smelling, red (“strawberry”) inflammation with a thin discharge
- wet mount: looks like a bouncing pear moving about with wiggly flagella (pears and whips)
- On a pap smear, there is often a second micro-organism, a very long filamentous bacterium called “leptothrix”.
- Often the result of illess or poor hygiene
Trichomonas
- adenomatous, may cause bleeding
- fibrous nubbins covered with epithelium, hanging out of the
- They act as a wick, drawing bacteria into the endocervix and endometrial cavity.
Endocervical polyp
- Results from progesterone stimulation of the endocervix (i.e., pregnancy, old-fashioned contraceptive pills).
- The glands are abundant and have only a lacy stroma between them, along with many neutrophils.
Microglandular hyperplasia
- superficial and intermediate squamous cells
- mature squamous cells w/ production of large, resilient, cytoplasmic surface
- endocervical cells have flat honeycomb cluster with clear cytoplasm. Irregular shaped nuclei with short protrusions
normal PAP
- Dysplasia of the cervix (“cervical intraepithelial neoplasia”)
- Due to PERSISTANT HPV infection
- CIN I (LSIL) can regress (less likely with higher grades)→ can eventually become carcinoma in situ
- L1 protein staining:
- L1 staining still there→ maybe you can just watch
- L1 staining lost→ likely to persist/get nasty
What stage are each of these?
1) Koilocytes only (halo + atypia). Perhaps a condyloma acuminatum or a flat wart. (mild dysplasia))
2) Plenty of atypical cells in the lower portions, normal maturation toward the surface (moderate dysplasia)
3) The cells no longer mature as they reach the surface (severe dysplasia)
- CIN I: Koilocytes only (halo + atypia). Perhaps a condyloma acuminatum or a flat wart. (mild dysplasia))
- CIN II: Plenty of atypical cells in the lower portions, normal maturation toward the surface (moderate dysplasia)
- CIN III: The cells no longer mature as they reach the surface (severe dysplasia)
What type of Cancer?
- arising from CIN III is usually squamous.
- Carcinoma in situ becomes this
- Presents as vaginal bleeding or post coital bleeding
- New stain for p16 lights up the more aggressive intraepithelial lesions
INVASIVE CANCER
- See koilocytic atypia on PAP
- low grade or high grade (invasive)
- Ki‐67 and p16 IHC
- Recall the E6 (p53) and E7 (pRb) proteins prevent cell cycle arrest.
HPV
- Low risk HPV, 6, 11, 42, 43
- High risk HPV, 16, 18, 31, 33
Uterine defects:
- prolapse
- Bicornuate uterus
- _______: variant of bicornuate. contains two cervixes
Didelphis
Which phase of the menstrual cycle?
- contains small, quiet glands. -cells undergoing mitosis or stromal mitosis
- some edema
Early proliferative stage
Which phase of the menstrual cycle?
- glands start to get tortuous
- some edema
Middle proliferative stage
Which phase of the menstrual cycle?
- glands are now very tortuous
- no edema
Late proliferative stage
Which phase of the menstrual cycle?
-Subnuclear vacuoles
Early secretory phase
Which phase of the menstrual cycle?
- Exhaustion
- disorganized
Late secretory phase
Which phase of the menstrual cycle?
- Stromal break down
- RBCS
Menstrual endometrium
Secretory Phase: Starts at ovulation (Day 14):
- Day 14-16: glycogen vacuoles appear.
- Day 19 or so: more secretion, and the glycogen and vacuoles are gone.
- Day 20 or so: lots of secretion and begin to see stromal edema.
- Day 22: maximal secretion, maximal sawtooth appearance of glands, but no decidualization.
- Day 23-34: sawtoothing of glands, spiral arteries begin to nourish the fetus, predecidual reaction and lymphocytes
- Day 24: great predecidua and lymphocytes.
- Day 26: neutrophils, no pregnancy this month…..
What will the baby make to keep the endometrium growing?
hCG
note: Guf says wont ask days but just review anyways…
What does most “dysfunctional uterine bleeding” result from?
- common around menarche and menopause
- results in estrogen-driven proliferative phase without progesterone-driven secretory phase
- Endocrine disorders, ovarian lesions, metabolic disturb
Anovulatory cycles (failure to ovulate)
Eventually get overgrowth of blood supply→ begin to degenerate and then there will be bleeding
What are some other causes of dysfunctional uterine bleeding?
Inadequate luteal phase
- Infertility
- Increased bleeding or amenorrhea
- Decreased progesterone in the post ovulatory period
Age group related abnormal bleeding?
-Prepuberty: precocious puberty (hypothalamic, pituitary, or ovarian origin)
-Adolescence: Anovulatory cycle, coagulation disorders–>amemia
-Reproductive age:
–>Complications of pregnancy (abortion, trophoblastic disease, ectopic pregnancy)
–>Anatomic lesions (leiomyoma, adenomyosis, polyps, endometrial hyperplasia, carcinoma)
–>Dysfunctional uterine bleeding (anovulatory cycle, ovulatory dysfunctional bleeding (e.g.,
inadequate luteal phase)
-Perimenopausal: dysfunctional uterine bleeding due to anovulatory cycle or anatomic lesions (carcinoma, hyperplasia, polyps)
-Postmenopausal: Endometrial atrophy, anatomic lesions (carcinoma, hyperplasia, polyps)
Just look over…table from robins
- secondary amenorrhea due to loss of basalis→ scarring
- Result of overaggressive dilation and curettage (D & C) → scrape away too much of uterine wall (scrape away basalis so you cant regenerate endometrium)
Asherman syndrome
intrauterine adhesions/scarring can cause pain and/or infertility
- Inflammation of the endometrium of the uterus
- Presence of microabscesses and / or neutrophils within the endometrial glands
Acute endometritis
may be staph or strep
- Inflammation of the endometrium
- Incr plasma cells within the endometrial stroma
- Abnormal uterine bleeding
- Pelvic pain
- Infertility
Chronic endometritis
Common causes of chronic endometritis?
PLASMA CELLS
Chlamydia
Also:
TB, cancer
- Exophytic mass projecting into the endometrial cavity
- clonal overgrowths of endometrium that do not cycle with the rest of it (likely to bleed between cycles)
- thick-walled blood vessels
- risk of torsion
What can these arise as a side effect of ?
Endometrial polyps
Tamoxifen (anti-estrogenic on breast BUT pro-estrogenic effects on endometrium)
- Endometrium (glands and stroma) outside the uterus (MC ovary)
- Sx: dysmenorrhea, pelvic pain, infertility
- Risk of malignant transformation (assoc w/ ovarian ca=endometrioid and clear cell type)
- Release pro-inflam factors
- PGE-2 incr estrogen locally
Endometriosis
- Minor lesions look like powder burns under the serosal surface→ gun powder appearance if involves soft tissue
- Large lesions: blood has organized & w/ extensive fibrosis (fallopian tube lesions=scarring→ increases risk of infertility/ectopic pregnancy]
note: oral contraceptive pill seems to prevent endometriosis from forming.
-present as “chocolate cysts” →full of old blood
Longstanding endometrial lesion (endometriosis)
-Endometrial tissue extends deep into the wall of the uterus (myometrium)
Adenomyosis
-Common cause of abnormal bleeding and serves as a precursor to endometrial cancer
-Toooo….many glands, toooo….little stroma.
-Due to too much estrogen (endogenous, exogenous)
-Assoc. conditions:
obesity (adipose tissue–>estrogen), menopause, PCOS, drugs
-Inactivation of the tumor suppressor gene PTEN.
-The world health organization, describes two types: Non‐atypical and atypical
Endometrial hyperplasia
Which type of endometrial hyperplasia?
- no atypia
- crowded glands
- decr stroma
- dilated glands
Non‐atypical