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Arch Dermatol. 2007;143(9):1201-1206.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Diagnosis: Palmoplantar eccrine hidradenitis (PEH).

MICROSCOPIC FINDINGS

Examination of the hematoxylin-eosin–stained skin biopsy specimen from the erythematous tender nodule revealed a dense neutrophilic inflammatory infiltrate around the eccrine sweat glands.

DISCUSSION

Palmoplantar eccrine hidradenitis is a distinct entity with characteristic clinical findings. First reported in 1988, it was named traumatic plantar urticaria.¹ Since then, 47 cases have been reported under 5 different names, including idiopathic (palmo)plantar hidradenitis and recurrent palmoplantar hidradenitis.² It primarily affects healthy children and is characterized by an abrupt appearance of erythematous, tender nodules on the palms and soles that may last 1 to 4 weeks and cause considerable difficulty in walking.² Most eruptions are limited to the plantar surfaces, although palmar lesions have been documented.³ Typical histiologic findings include a neutrophilic perieccrine infiltrate in the setting of varying degrees of superficial and deep perivascular infiltrates of neutrophils, lymphocytes, and histiocytes as well as septal panniculitis.³

The etiology of PEH remains unknown. Local mechanical . . . [Full Text of this Article]