22 results
Infectious Joint Pain - Differential Diagnosis Algorithm 
Polyarticular Join Pain
 • Viral Myalgia
 • Viral Arthritis
Infectious Joint ... Pain - Differential ... rash) • Primary HIV ... #JointPain #MSK ... #Orthopedics #Causes
Approach to Joint Pain - Diagnostic Framework

1) Chronicity
2) Inflammatory vs Non-Inflammatory
3) Number of Joints Involved

1) Chronicity:
Pain - Diagnostic ... Like in this case ... - parvovirus, HIV ... #Joint #Pain #MSK ... approach #workup #differential
Causes of Bone/Joint Pain in Sickle Cell Disease
Vaso-occlusive pain:
 • Mechanism: ischemic pain
 • Can present
Causes of Bone/Joint ... common sites: hip ... • XR, MRI to ... dz difficult to see ... Osteomyelitis / Septic Arthritis
Approach to Joint Pain

History:
Is the pain from:
	• Joint
	• Adjacent bursa
	• Tendon
	• Ligament
	• Bone
	• Muscle
	• Referred from
disease must be ... Calcium oxalate Infectious ... e.g., congenital hip ... #Pain #MSK #rheumatology ... approach #workup #differential
Approach to Joint Pain - Arthritis Differential Diagnosis Framework

Inflammatory Versus Noninflammatory Pain
 • Is it inflammatory
Pain - Arthritis ... Caused By: - ... Parvovirus B19 • HIV ... Joint #pain #Differential ... #Diagnosis #MSK
Leg Pain - Differential Diagnosis Framework

Bone/Joint Causes of Leg Pain:
 • Fracture
 • Arthritis
 • Gout/pseudogout
Leg Pain - Differential ... Causes of Leg Pain ... • Infection: Cellulitis ... Herpes zoster - HIV ... lower #extremity #msk
Ear Pain (Otalgia) - Differential Diagnosis Framework

Primary Otalgia 
 - Pain that originates from the ear
) - Differential ... Temporomandibular joint ... Cervical spine arthritis ... Cricoarytenoid arthritis ... subdural hematoma, lung
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
- Differential ... Fever/Chills/Joint ... pain/Night sweats ... Brucellosis - Viruses: HIV ... diagnosis #msk #
Great Mimickers - SHALLOTS Mnemonic

S- Syphilis - Neurosyphilis, aortitis, gummas... Granulomas can form anywhere! Skin, mucosa,
Skin, mucosa, joints ... , bones, lungs, ... cause? ... the ear or brain ... Mnemonic #Diagnosis #Differential
CNS Ring-Enhancing Lesions - Immunocompromised vs Immunocompetent
Multiple Ring-Enhancing Lesions:
 • Toxoplasmosis (CD4 < 100)
 • Other
Compatible syndrome + MRI ... lesions • 80% with lung ... RingEnhancing #Lesions #Brain ... #differential # ... diagnosis #causes