Genitourinary: Part 6 Flashcards
What aged men are effected by testicular tumours
15-44
What percentage of testicular tumours arise from germ cells
96%
Name two germ cell tetsicular tumours
Seminomas
Teratomas
What age people does teratomas effect
Infants
What age people do seminomas effect
25-40 years
Name three non-germ cell tumours
- Leydig cells
- Sertoli cell tumours
- Sarcomas
Risk factors for testicular tumours
- FAMILY HISTORY
- Infant hernia
- Undescended testis
- Infertility
Clinical presentation of testicular tumours
- Painless lump in testicles
- Tetsicular or abdo pain
- Cough and dyspnoea (due to lung metastases)
- Back pain - para-aortic lymph node metastasis)
- Abdo mass
Differential diagnosis of testicular tumours
- Testicular torsion
- Lymphoma
- Hydrocele
- Epididymal cyst
Diagnostics for testicular tumours
- ULTRASOUND
- BIOPSY + HISTOLOGY
- SERM tumour markers
- CXR + CT - assess tumour staging
Why is an ultrasound used in testicular tumours
- Differentiate between masses in the body of the testes and intrascrotal swellings
Name some serum tumour markers
- Alpha-fetoprotein
2. Beta subunit of hCG (B-hCG)
Level of AFP and B-hCG in teratomas
RAISED
Level of AFP and B-hCG in seminomas
Normal AFP and raised B-hCG in some
Treatment of testicular tumours
- RADICAL ORCHIDECTOMY via inguinal approach
2. Sperm storage offered
Treatment of seminomas with metastases below diaphragm
RADIOTHERAPY only
What are widespread testicular tumours treated
CHEMOTHERAPY
What are teratomas treated with
CHEMOTHERAPY
Define UTI
- Inflammatory response of the urothelium to bacterial invasion, usually associated with bacteria and pyuria
What boundaries define UTI
- > 10^5 organisms/ml in fresh mid-stream urine
What 5 pathogens account for UTI
KEEPS K = Klebsiella spp. E = E.coli (MOST COMMON) E = Enterococci P = Proteus spp. S = Staphylococcus spp (coagulase negative)
Three ways we classify UTIs
- LOCATION: Lower UTI vs Upper
- CLINICAL RISK: Uncomplicated vs complicated
- TIMING: Single/isolated vs Unresolved
Acute vs Chronic
What strain of e.coli causes UTI
UPEC - uropathogenic strains of E.coli
What structures are found on the surface of E.coli
- FIMBRIAE/PILLI
- Glcocalix
- Acid polysaccharide coat that resists phagocytosis
What structures do bacteria adhere to
- UROTHELIUM
- VAGINAL EPITHELIUM
- VAGINAL MUCUS
Under what circumstance is rate of adhesion highest
- Oestrogen depletion due to the loss of lactobacilli and pH rises causing increases colonisation by colonic flora and reduction in vaginal mucus secretion
In what people is oestrogen-depleted UTI common in
Post-menopausal women
What antigen increases susceptibility to RECURRENT UTIs if you have it
HLA-A3
3 ways UTI causing bacteria defends itself against the host
- CAPSULE - resists phagocytosis
- TOXIC cytokines
- ENZYME PRODUCTION
What enzyme secrete urease against the host
GRAM NEGATIVE: Proteus, Klebsiella and pseudomonas
GRAM POSITIVE: Staphylococci + Mycoplasma
Host defence mechanisms against UTI causing bacteria
- ANTEGRADE flushing of urine
- Tamm-Horsfall protein - antimicrobial
- Low urine pH and high osmolarity
- Urinary IgA
Name the UTI in the upper tract
- PYELONEPHRITIS
Name the UTI in the lower tract
- Cystitis
- Prostatitis
- Epididymo-orchitis
- Urethritis
What is an uncomplicated UTI I
UTI in healthy non-pregnant women with normally functioning urinary tract
What is a complicated UTI
- Infection in patients with abnormal urinary tract (stones, obstruction, systemic diseases involving the kidney like diabetes)
Problems with complicated UTIs
treatment failure