Elastofibroma dorsi: Diagnostic problems and pitfalls

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Abstract
The diagnostic cytomorphologic findings in a case of elastofibroma dorsi are described in this report. The correct diagnosis was initially overlooked on fine-needle aspiration, and was subsequently made by open biopsy. Review of the FNA material, however, demonstrated scanty but diagnostic material. Cytologic examination revealed a mixture of fibroblasts, adipose tissue, and swollen lightly staining cyanophilic elastic fibers in a background of collagenous matrix. Cross sections of the elastic fibers had the typical serrated and globular appearance. These fibers stained positive with elastin stains. The cytomorphology of elastofibroma dorsi with diagnostic pitfalls and differential diagnostic dilemmas are discussed in this article.

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