Spiny Eruption on the Neck
William A. Strickling, MD;
Scott A. Norton, MD
Raymond Bliss Army Hospital, Fort Huachuca, Ariz
Arch Dermatol. 2000;136:1165-1170.
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REPORT OF A CASE
A 29-year-old Mexican American man described a several-year history of a spiny eruption on the back of his neck. The area had been treated unsuccessfully with corticosteroid creams.
Physical examination showed several well-demarcated clusters of abundant discrete follicular papules. The papules, which measured approximately 1 mm in diameter, were slightly hypopigmented and monomorphous, and most had a central keratinous spine (Figure 1 and Figure 2). The skin over the triceps, the anterior aspect of the thighs, and the buttocks was uninvolved. A punch biopsy specimen was obtained (Figure 3).
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Figure 1.
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Figure 2.
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Figure 3.
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What is your diagnosis?
Diagnosis: Lichen spinulosus (LS).
Hematoxylin-eosin–stained sections showed dilated infundibula with orthokeratotic follicular plugs protruding slightly above the surrounding surface. There was a scant subjacent lymphocytic infiltrate. Fungal and bacterial stains revealed no organisms.
Lichen spinulosus is an idiopathic disorder characterized by scattered 2- . . . [Full Text of this Article]
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