23 results
Skin Conditions Associated with Joint Pain

Rash
	• Human parvovirus B19 infection

Malar rash
	• SLE
	• Human parvovirus B19 infection
	•
parvovirus B19 infection ... parvovirus B19 infection ... Sarcoidosis #dermatology ... #joint #pain #skin ... #rashes #differential
Reticulocyte Production Index = (Retic %) x (Hct / 45) / Maturation Factor
The maturation factor is
B12, Folate • Hormone ... (e.g. cancer, infection ... G6PD deficiency), Infections ... Production #Index #hematology ... #anemia #differential
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
Fever/Chills/Joint pain ... Weight loss - DDX ... : - Infection ... to the knee Infectious ... Disease Post-Infectious
Hodgkin's Lymphoma vs Non-Hodgkin's Lymphoma - Comparison

Hodgkin's Lymphoma:
 • Epidemiology: young adults 20-30, older 50-70
 •
e.g., HIV), EBV infection ... Alcohol-induced pain ... : Pain in involved ... Etiology: - Infections ... #hematology
Cold Agglutinin Disease

3 Types of Cold Sensitive Antibodies:
  1. Cold Agglutinins (CAD)
  2. Donath-Landsteiner
- Due to Viral infection ... Polyclonal - Viral Infection ... Check For: • Infections ... Polyclonal IgM post infectious ... hemolytic #anemia #hematology
Dermatological semiology of Cutaneous Vasculitis 

Clinicopathologic correlations
 • Purpura, papules, pustules, necrosis: involvement of small vessels
vasculitis (5%): PAN ... vasculitis (3%) • Infections ... Vasculitis #dermpath #dermatology ... pathology #lesions #differential
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
burning sensation or pain ... reticularis Differential ... cell arteritis Infections ... diseases • Fungal infections ... Polyangiitis #GPA #dermatology
Capnocytophaga Canimorsus Skin Rash

40 M presents w/ N, V, severe epigastric pain. SHx: smoker, drinks 18
When considering infections ... C. canimorsus infection ... Capnocytophaga infection ... Indiana University Infectious ... Canimorsus #Skin #Rash #dermatology
Allopecia - Differential Diagnosis Framework for Hair Loss

Localized / Focal Hair Loss Pattern:
 • Scarring Alopecia:
Alopecia: - Infectious ... Post op, Post infection ... adenopathy suggest infection ... restriction) • Hormonal ... #Diagnosis #dermatology
Causes of Petechial Rash - Differential Diagnosis Algorithm

Pinpoint areas (less than 2 mm) of hemorrhage, which
Petechial Rash - Differential ... - Trauma - Infection ... lesions • Severe pain ... Disseminated gonococcal infection ... Algorithm #Causes #dermatology