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To the Editor.—
We would like to add our experiences to those of Dr. Verboy, as reported in the Archives (107:918,1973). We examined 100 men from a Naval Institute and found five cases of calcanel petechiae. We use the term "acroseudocromhidrosis" because there are reports of localization on the fingers.Our histological studies revealed collections of pigmented material in the horny layer, either interstitially or inside the intracorneal sweat ducts. Perhaps this material is hemoglobin-related, as suggested by the positive peroxidase reaction (Lison-Dunn method).We performed histochemical studies for the demonstration of succinodehydrogenase, leucilaminopeptidase, and α-naphthyl esterase. The eccrine coil and dermal duct did not show any changes, as compared with those of normal patients, but the intracorneal segment of the sweat gland showed a striking loss of α-naphthyl esterase activity.We assume that there is active participation of the eccrine glands and that the hemorrhagic foci in superficial dermis
Casas JG, Woscoff A. Calcaneal Petechiae. Arch Dermatol. 1974;109(4):571. doi:10.1001/archderm.1974.01630040075025