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Pseudo-blue lunula and beyond: a normal variant.

Yusra Siddiqui¹, Rashid M Rashid

¹Department of Dermatology, MD Anderson Cancer Center, University of Texas Medical School, Houston, TX 77030, USA.

|March 19, 2011

Summary

A newborn developed blue nail discoloration that persisted for two weeks. This benign finding resolved spontaneously without intervention, highlighting the importance of observation in similar pediatric cases.

Area of Science:

Pediatrics
Dermatology
Neonatology

Background:

A 12-hour-old newborn presented with persistent blue nail discoloration.
The condition was noted by parents and healthcare providers, prompting dermatological consultation.

Observation:

The blue discoloration was observed from the proximal to mid-nail bed.
It was non-blanchable and did not resolve with warming.
The discoloration persisted for 7 days post-birth, with complete resolution by 2 weeks.

Findings:

Physical examination and laboratory results (CBC, metabolic panel) were unremarkable.
No cardiac murmur was detected.
The blue nail color was the sole presenting sign.

Implications:

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This case highlights a benign, transient condition in newborns.
It underscores the importance of clinical observation when diagnostic tests are normal.
Distinguishing transient blue nail discoloration from significant cyanosis is crucial for appropriate management.