8 results
Approach to Joint Pain

History:
Is the pain from:
	• Joint
	• Adjacent bursa
	• Tendon
	• Ligament
	• Bone
	• Muscle
	• Referred from
present both at rest ... trauma (e.g., meniscal ... e.g., congenital hip ... osteopetrosis, avascular ... approach #workup #differential
Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
Knee Effusions - Differential ... Fever/Chills/Joint ... Seronegative Reactive Syndrome ... Ligamentous injuries - Meniscal ... diagnosis #msk #physicalexam
Leg Pain - Differential Diagnosis Framework

Bone/Joint Causes of Leg Pain:
 • Fracture
 • Arthritis
 • Gout/pseudogout
Leg Pain - Differential ... • Arthritis ... Herpes zoster - HIV ... #Leg #pain #differential ... extremity #msk #physicalexam
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Vasculitis - Differential ... pulse deficits vascular ... of shoulder and hip ... eruption • Joints ... Palpable purpura, joint
SLE (Systemic Lupus Erythematosus)

Suspect:
Clinical evidence of (fatigue, rash, photosensitivity, inflammatory arthritis, weight loss, and fever) and
, inflammatory arthritis ... permanent alopecia Differential ... Joint pain • Swan ... arthropathy • 90% joints ... • Malar rash - spares
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
Vasculitides - Differential ... and bullous or vesicular ... eruption - Joints ... retinopathy Lab Tests ... Cryoglobulins • HIV
Posterior Knee Dislocation Injury
Specifically, POSTERIOR KNEE DISLOCATIONS can have significant associated injury that needs unique approach
nerve injury (25%) TEST ... Check hip and ankle ... joints for associated ... Compartment syndrome ... special ligament/meniscus
Autoimmune Myositis - Differential Diagnosis Framework

Inflammatory Myopathies: Commonly symmetric proximal muscle weakness, no substantial muscle pain
Autoimmune Myositis - Differential ... Diagnostic Tests ... : Fever, joint pain ... weakness + atrophy- Hip ... • Nonerosive arthritis