A serious case of primary Raynaud's phenomenon in an infant
Published in the journal Clinical Case Reports, the authors present a case of primary Raynaud phenomenon (RP) over a period of 2 months in a 21‐month‐old boy. Despite prompt and intensive treatment, his fingertips turned black from the 8th day of hospitalization. However, the color showed improvement later, and he was discharged on the 45th day.

A 21‐month‐old boy presented to pediatric emergency care center with the chief complaint of cold extremities. His growth and developmental history were appropriate for his age, and he had no remarkable personal or family medical history.

Transient fever and mild cough were noted 2 weeks before the consultation. He had been treated for frostbite for about 2 weeks by the previous doctor, but there had been no improvement. The child often played outdoors with bare hands at his nursery school. The patient subjectively complained of cold and painful fingers.

His peripheral arterial pulse was detectable. (Figure 1A) However, his nailfold capillaries were difficult to observe. The electrocardiogram was normal, and no congenital heart disease was observed on echocardiography.

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