Fever in SLE is a diagnostic challenge: flare, infection—or both?
Before escalating immunosuppression, look for objective organ activity, investigate infection appropriately, and interpret biomarkers in clinical context.
#Lupus#SLE#Rheumatology#ClinicalReasoning#MedEd@docakx@IhabFathiSulima
Dose-dense chemotherapy means maintaining standard doses while shortening the interval—usually from every 3 weeks to every 2 weeks—with prophylactic G-CSF.
Key applications: breast cancer, urothelial cancer, Ewing sarcoma and selected aggressive lymphomas.
#MedicalOncology #Chemotherapy #BreastCancer #UrothelialCancer #EwingSarcoma #OncologyEducation
🆕✨🟢Clinical guideline highlights for the hospitalist: Updates on the treatment of drug-susceptible and drug-resistant tuberculosis
🔺2025 ATS/CDC/ERS/IDSA clinical treatment guidelines
🔺Rifampin exchanged for Rifapentine
🔺Elimination of Ethambutol, Addition of Moxifloxacin
🔺 Duration 🔽 from 4 month to 2 month continuation phase
🔺Logistical challenges related to rifapentine
🔺Further research is needed to identify predictors of treatment tolerability #idxposts
https://t.co/3GiysTAuL8
Hereditary colorectal cancer: know the pattern before ordering the panel. 🧬
Lynch, FAP, MAP, Peutz–Jeghers, juvenile polyposis and serrated polyposis—plus universal MMR/MSI screening.
Save for clinic and viva.
#ColorectalCancer#CancerGenetics#MedicalOncology
Cancer screening can appear successful—even when it has not reduced cancer mortality.
Understanding screening bias is therefore essential:
🔹 Lead-time bias: earlier diagnosis artificially increases measured survival without delaying death.
🔹 Length-time bias: screening preferentially detects slower-growing, less aggressive tumours.
🔹 Overdiagnosis bias: detection of cancers that would never have caused symptoms or death.
🔹 Selection/volunteer bias: people who participate in screening may be healthier and more health-conscious than non-participants.
The key lesson: improved 5-year survival after screening does not automatically prove benefit.
The most reliable endpoint is a reduction in cancer-specific or all-cause mortality, balanced against false positives, overdiagnosis, anxiety and treatment-related harm.
#CancerScreening #MedicalOncology #Biostatistics #Epidemiology #EvidenceBasedMedicine #OncologyEducation #DrNBOncology #CancerConceptsExplained
🔬 What Are ESBLs?
ESBLs are β-lactamase enzymes capable of hydrolyzing:
💊 Penicillins
💊 Third-generation cephalosporins
💊 Fourth-generation cephalosporins (some)
💊 Aztreonam
💡 ESBLs are usually inhibited by β-lactamase inhibitors such as clavulanic acid.
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🧬 Common ESBL Families
The three major ESBL families are:
🔹 CTX-M (most common worldwide)
🔹 TEM
🔹 SHV
💡 CTX-M enzymes have become the predominant ESBL type globally.
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🦠 Which Bacteria Produce ESBLs?
Most commonly:
🦠 Escherichia coli
🦠 Klebsiella pneumoniae
Less commonly:
• Proteus mirabilis
• Enterobacter spp.
• Citrobacter spp.
• Serratia spp.
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⚠️ Clinical Importance
ESBL-producing bacteria commonly cause:
🚽 Urinary tract infections (UTIs)
🩸 Bloodstream infections
🫁 Pneumonia
🩹 Wound infections
🏥 Hospital-acquired infections
These infections are associated with:
❌ Limited treatment options
❌ Increased treatment failure
❌ Longer hospital stays
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🧪 How Are ESBLs Detected?
Clinical laboratories detect ESBL production using:
✅ Antimicrobial susceptibility testing (AST)
✅ Combination disk tests
✅ Double-disk synergy test (DDST)
✅ Molecular methods (PCR)
💡 CLSI and EUCAST provide recommendations for interpretation.
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💊 Treatment
Treatment depends on:
• Infection site
• Severity
• AST results
Common options may include:
💊 Carbapenems (for severe invasive infections)
💊 New β-lactam/β-lactamase inhibitor combinations when appropriate
⚠️ Treatment should always be guided by antimicrobial susceptibility testing and local guidelines.
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🧠 Interesting Facts
🔹 ESBL genes are commonly carried on plasmids, allowing rapid spread between bacteria.
🔹 ESBL-producing organisms are frequently resistant to multiple non-β-lactam antibiotics as well.
🔹 CTX-M enzymes have largely replaced older TEM and SHV ESBLs in many parts of the world.
【Aspergillus galactomannan false positive】
It's important to understand that there are various potential causes of false positives for Aspergillus galactomannan!
Level: Intermediate to advanced
#IDMedEd#IDFellow#IMResident#Aspergillus#TxID#HemOnc