What are calcaneal petechiae?

Calcaneal petechiae, also known as talon noir ('black heel'), are a benign condition due to the accumulation of blood in the stratum corneum of the heel. Many other terms have been used to describe these haemorrhagic lesions of the stratum corneum, including subcorneal haematoma, haemorrhagic hyperkeratosis, basketball heel, and tennis heel/toe. Similar lesions can be found on the hands, such as tache noir ('black palm') and PlayStation thumb.

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