FELON
FELON ICD-10: L03.0
• Local infection of the distal fingertip, occurring in the pulp.
• History: Penetrating injury, splint, and paronychia.
• Findings: Pain, erythema, swelling, and abscess (Fig. 32-17).
• Distribution: Thumb and index finger.
• Complications: Osteitis, osteomyelitis of distal phalanx, joint with septic arthritis; extension into distal end of flexor tendon sheath, and producing tenosynovitis.
• Course: May be rapid and severe.
FUNGAL INFECTIONS AND ONYCHOMYCOSIS
FIGURE 32-16 • Acute paronychia The proximal nail fold is red and edematous (cellulitis) with pus formation.
FIGURE 32-17 • Felon An abscess is seen on the fingertip with surrounding erythema and swelling. Methicillin-sensitive S. aureus (MSSA) was isolated on culture of the pus.