Sexually transmitted differential diagnosis

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

Chancre DDX

Back (Answer)

Chlamydia - painful (soft) “weepy” Chancroid - painful (soft) “bloody” Syphilis - painless (hard)

Front (Question)

Chlamydia DDX

Back (Answer)

chlamydia lymphogranuloma venereum (scar tissue in lymphatics) PID Reiters disease/ Reactive arthritis (HLAB27) (feet)

Front (Question)

Causes of PID

Back (Answer)

e.coli chlamydia gonorrhea staph infection

Front (Question)

Asymptomatic female DDX

Back (Answer)

chlamydia gonorrhea (knee) human papilloma virus HPV

Front (Question)

Asymptomatic male DDX

Back (Answer)

trichomonas candida albicans

Front (Question)

Most common STD in US

Back (Answer)

Chlamydia

Front (Question)

• yellow, odorless discharge • painful soft lesions • reiter’s (reactive arthritis) (feet)

Back (Answer)

Chlamydia

Front (Question)

• Gram negative • copious clear discharge • tonsillitis, pharyngitis => arthritis (knee)

Back (Answer)

Gonorrhea - Neisseria Gonorrhea

Front (Question)

• painful vesicles • latency • red lesions with yellow oozing center • watery discharge • type I and II recturrent • prodrome of itching

Back (Answer)

Herpes

#10

Front (Question)

• Protozoa - greenish yellow, itchy, foul discharge

Back (Answer)

Trichomonas - trichomonas vaginalis

#11

Front (Question)

• Haemophilus Ducrey (soft chancre) • lesions rapidly ulcerate and bleed • large painful ulcers, pus => buboes

Back (Answer)

Chancroid - “How he do cry, he has a bloody chancre on his wanker bloody buboes”

#12

Front (Question)

• thrush, yeast, fungus, moniliasis • gram positive* • white cheese material covers vaginal walls

Back (Answer)

Candidiasis - candida albicans

#13

Front (Question)

• Primary: 4-8 weeks - (one) painless lesion, hard, firm

Back (Answer)

Syphilis one

#14

Front (Question)

Treponema Pallidum (spirochete)

Back (Answer)

Syphilis – spirochete = congenital = crosses placenta

#15

Front (Question)

• appears 12 weeks later • rash persists for months (80%) • lymphadenopathy (50%) • condylomata lata (warts) • alopecia (hair loss)

Back (Answer)

Syphilis 2 (skin)

#16

Front (Question)

• Gumma (skin, visceral granulomatous lesion) • General paresis (damentia) • Argyll Robertson pupil • Tabes Dorsalis - posterior column tracts • positive romberg’s test • charcot’s joints • specific test - FTA

Back (Answer)

Symphilis 3 (inside)

#17

Front (Question)

Adults get what stages of syphilis?

Back (Answer)

1,2,3

#18

Front (Question)

• Hutchinson’s triad = _____, ____, and ____ - associated with?

Back (Answer)

saddle nose, interstitial keratoses (hardening of eyes), peg teeth – Congenital syphilis

#19

Front (Question)

What do syphilis and herpes have in common?

Back (Answer)

• periods of latency - DRG

#20

Front (Question)

• caused by chlamydia - enlarged regional inguinal lymph nodes that may lead to elephantiasis and rectal strictures and abscesses

Back (Answer)

Lymphogranuloma venerum

#21

Front (Question)

• Donovania Granulomatous • painless, velvety, slow going • Bright beefy red granulomatous lesions • Donavon bodies

Back (Answer)

Granuloma inguinale

#22

Front (Question)

• Human papilloma virus (16&18) • Condylomata acuminata • cervical dysplasia leads to cervical cancer • usually small, itchy, cluster • speculum = SCREEN • PAP = confirm (specific test)

Back (Answer)

Genital Warts

#23

Front (Question)

• multiple skin tags that exfoliate, waxy papules

Back (Answer)

Molluscum Contagiosum

#24

Front (Question)

• Autoimmune • most common Bulla lesion • lethal • South americans • IgG

Back (Answer)

Pemphigoid