Ann Dermatol.  2008 Sep;20(3):130-133. 10.5021/ad.2008.20.3.130.

A Case of Eruptive Collagenoma on the Left Calf

Affiliations
  • 1Department of Dermatology, College of Medicine, Hallym University, Anyang, Korea. 937121@hallym.or.kr

Abstract

Eruptive collagenoma is an acquired connective tissue nevus without family history. It is typically described as numerous small papules or nodules on the trunk and arms with histopathological features of decreased or degenerated elastic fibers. We report a case of a 16-year-old male who presented with multiple asymptomatic 2 to 5 mm sized yellowish grouped papules on the left calf. Histopathologically, the lesion showed thickened homogenized collagen fibers highlighted by Masson trichrome stain and decreased and fragmented elastic fibers stained by Verhoeff-van Gieson stain. The skin lesion was diagnosed as eruptive collagenoma and no treatment was provided.

Keyword

Eruptive collagenoma

MeSH Terms

Adolescent
Arm
Azo Compounds
Collagen
Connective Tissue
Elastic Tissue
Eosine Yellowish-(YS)
Humans
Male
Methyl Green
Nevus
Skin
Azo Compounds
Collagen
Eosine Yellowish-(YS)
Methyl Green
Nevus

Figure

  • Fig. 1 Multiple 3 to 5 mm diameter sized slightly raised, yellowish grouped papules on the left calf.

  • Fig. 2 (A) Skin biopsy from the left calf revealed slightly homogenized condensed collagen and decreased elastic fibers in the dermis (H&E, ×40). (B) Excessive accumulation of collagen in the dermis (Masson's trichrome stain, ×40). (C) Decreased and fragmented elastic fibers in the dermis (Verhoeff-van Gieson stain, ×40).


Cited by  1 articles

The Importance of Collagen Tissue in Papular Elastorrhexis, Eruptive Collagenoma, and Nevus Anelasticus
Seung Ho Lee, Nam Hee Sung
Ann Dermatol. 2016;28(2):210-215.    doi: 10.5021/ad.2016.28.2.210.


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