Yellow lunulae with fluorescence after tetracycline therapy

Abstract

Yellow lunulae with yellow fluorescence under Wood's lamp examination developed in a patient treated with a high-dose tetracycline hydrochloride regimen for cystic acne after one month of therapy. The clinical findings in other causes of yellow nail pigmentation are reviewed. The Wood's lamp examination is useful in distinguishing tetracycline-induced yellow nails from other causes of yellow nail pigmentation and may be helpful in determining patient compliance with tetracycline hydrochloride regimens of 1 g or more daily.

Evaluation of Nail Findings in Patients with COVID-19 History and Wood’s Lamp Examination

“…Also, porphyrin metabolites accumulated in urine and teeth can be observed by Wood's lamp examination as a pink fluorescence in porphyria [ 17 ]. As for drug accumulations on nails, yellow-green and yellow reflections have been defined with mepacrine and tetracycline treatments, respectively [ 18 ]. In our study, we have detected a luminescence due to the accumulation of the favipiravir itself or its excipients.…”