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| Presentation |
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The child had been healthy previously and had received his primary immunization series for diphtheria, tetanus, pertussis, polio, Haemophilus influenzae type b, and hepatitis B. His parents have not administered any medication other than acetaminophen and ibuprofen for the fever. They denied any trauma to the hand or exposure to any animals.
Physical examination revealed an irritable but consolable infant who
held his left arm in flexion with his fingers partially flexed
(Fig. 1
).
He had a temperature of 40.7°C
(105.3°F), respiratory rate of 32 breaths/min, pulse of 170
beats/min, and blood pressure of 124/76 mm Hg. The
left hand was swollen from the fingers to 1 cm proximal to the
wrist. The dorsum of the left hand was red, warm, and tender, with no
clear distinction between the red and the normal skin. The infant cried
during passive flexion and extension of the left fingers, but gave no
evidence of pain on active and passive movement of the left wrist. No
blisters were noted on the hand. Findings on examination of the head,
ears, eyes, nose, and throat were normal. Tears and moist mucous
membranes were present. Auscultation of the chest demonstrated
bilateral clear breath sounds and normal S1 and S2 heart sounds
without a murmur. Abdominal, genitourinary,
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