A 45-year-old male with fever and limb pain – What’s the diagnosis?

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:stethoscope: A 45-year-old male with fever and limb pain – What’s the diagnosis?

A 45-year-old man presents with:

  • High-grade fever for 2 days
  • Severe pain in the lower limb, disproportionate to local findings
  • Mild swelling, minimal redness
  • Tachycardia, toxic look
  • No obvious history of trauma

On examination:

  • Limb is tender, skin looks relatively normal
  • Pain worsens with passive movement
  • Labs: ↑ WBC, ↑ CRP

:red_question_mark: What is the MOST LIKELY diagnosis?

A. Cellulitis
B. Deep vein thrombosis
C. Acute osteomyelitis
D. Necrotizing fasciitis

:backhand_index_pointing_right: Answer: D. Necrotizing fasciitis

:red_circle: Why Necrotizing Fasciitis?

  • Pain out of proportion to clinical signs
  • Rapid progression with systemic toxicity
  • Early skin changes may be minimal
  • A surgical emergency — delay = high mortality

:police_car_light: Key Red Flags

:warning: Severe unexplained limb pain
:warning: Fever + tachycardia
:warning: Rapid clinical deterioration
:warning: Crepitus / skin discoloration (late sign)

:hospital: Management Principles

  • Immediate surgical exploration & debridement
  • Broad-spectrum IV antibiotics
  • Aggressive fluid resuscitation
  • ICU monitoring

MBH/PS