10 results
Causes of Erythema Nodosum - Mnemonic

NO cause found in 60% of cases
Drugs (antibiotics e.g., sulfonamides, amoxicillin)
Oral
Bechet's Micro: TB ... Viral: HSV, ... EBV, HIV, HepB, ... Differential #Diagnosis #Dermatology
Fever and Rash - Differential Diagnosis Framework
 • Viral: Measles, Infectious Mono (EBV, CMV), Acute HIV,
EBV, CMV), Acute HIV ... , Disseminated HSV ... shock syndrome, TB ... Differential #Diagnosis #dermatology
Tuberculosis Overview

10 million new M. tuberculosis infections/year
Facultative intracellular rod-shaped bacteria
Multidrug-resistant tuberculosis (MDR-TB) accounts for 4.6% of
: • HIV • Recent ... bacteremia, and miliary ... are pulmonary • HIV ... Hematogenous spread -> Miliary ... : • HIV-infected
Tuberculosis Overview

10 million new M. tuberculosis infections/year
Facultative intracellular rod-shaped bacteria
Multidrug-resistant tuberculosis (MDR-TB) accounts for 4.6% of
: • HIV • Recent ... bacteremia, and miliary ... are pulmonary • HIV ... Hematogenous spread -> Miliary ... : • HIV-infected
Causes of Thrombocytopenia - Differential Diagnosis Framework
Decreased Production:
 - Drugs (chemo, yang, sulfa, acetaminophen, NSAIDs, quinine,
etc) - Viral: HIV ... , HCV, EBV, CMV ... malignancy, infection (TB ... Diagnosis #Framework #hematology
Causes of Diffuse Lymphadenopathy - Differential Diagnosis Algorithm
Reactive:
 - Systemic Inflammatory
     •
• CMV • HIV ... • Insect Bites ... Algorithm #Causes #Hematology
Differential Diagnosis for Hemolytic Anemia
Intrinsic Causes:
 • Enzyme deficiencies ex. G6PD, pyruvate kinase 
 • Hemoglobinopathies
, spider/snake bites ... Hemoglobinuria • S/p IV ... Rhogam • S/p IV ... classification #hematology
Causes of Pseudocellulitis - Differential Diagnosis Framework for Cellulitis Mimics

Cellulitis: Deep skin and subcutaneous fat infection

Pseudo
Pseudocellulitis: • Insect bites ... Compartment syndrome • IV ... mimickers #Causes #dermatology
Capnocytophaga Canimorsus Skin Rash

40 M presents w/ N, V, severe epigastric pain. SHx: smoker, drinks 18
with wife, bit by his ... related to dog bites ... Canimorsus #Skin #Rash #dermatology
Erythemas Summarized
Erythema ab igne
 • A dermatosis that results from repeated exposure to heat (fires, heating
include: infections (HSV ... endemic mycoses, TB ... differential #diagnosis #dermatology