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Indian Pediatr 2013;50: 982

Black Heel (Talon Noir) Associated with a Viral Exanthem


Kabir Sardana and *Vivek Sagar

Department of Dermatology, Maulana Azad Medical College and Lok Nayak Hospital, New Delhi, India

*Department of Dermatology, ESI Model hospital, Sector -9A.Gurgaon, Haryana.
Email: [email protected]
 


A 6-year-old child was referred for a suspected viral exanthem associated with URTI. On examination the trunk showed a maculopapular rash while the sole showed multiple black "spots" which were present for 7 days. A diagnosis of Talon noir was confirmed by paring the lesion with a No 15 blade which removed the superficial layer of the stratum corneum, and revealed puncta of black pigment of extravasated red cells.

Fig. 1 Black macules with irregular margins on the sole

This condition is normally seen as a post-traumatic intraepidermal hemorrhage seen most often in basketball players and is also known as "calcaneal petechiae". The shearing forces rupture papillary dermal blood vessels, with subsequent leakage of blood into the epidermis. The major differentials include cutaneous melanoma, lentigines, traumatic tattoo, verruca vulgaris and corn. Melanoma, lentigines and traumatic tattoo cannot be removed by paring. Dermoscopy, if available can distinguish Talon noir from melanoma. Plantar warts are painful and bleed on paring while corn do not bleed. In our patient probably the viral infection predisposed to capillary fragility which in association with the normal shearing force on the sole led to the disorder. The child used to walk barefoot even before the viral exanthema without any history of a similar lesion in the past. Vitamin C 500 mg once a day lead to resolution within 7 days. The disorder can also resolve spontaneously.

 

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