J Korean Soc Radiol.  2011 Jan;64(1):67-70. 10.3348/jksr.2011.64.1.67.

Collagenous Fibroma (Desmoplastic Fibroblastoma) of the Finger: A Case Report

• Sung YJ
• Koo JB

• KMID: 1443584
• DOI: http://doi.org/10.3348/jksr.2011.64.1.67

Abstract

Collagenous fibroma is a recently described, rare, benign, soft tissue tumor that arises in the subcutaneous tissue or muscle. We report here on a case of a collagenous fibroma of the finger. A 54-year-old man was admitted to our hospital with a painless, slow-growing mass in the finger. On magnetic resonance imaging (MRI), the mass showed iso-signal intensity on the T1-weighted image, low signal intensity on the T2-weighted image and focal non-enhancing areas on the contrast-enhanced T1-weighted image. The lesion was totally removed by surgical excision and it was pathologically confirmed to collagenous fibroma.

MeSH Terms

Collagen
Fibroma
Fibroma, Desmoplastic
Fingers
Humans
Magnetic Resonance Imaging
Middle Aged
Muscles
Soft Tissue Neoplasms
Subcutaneous Tissue
Collagen

Figure

• 

  Fig. 1 A. Clinical appearance of the tumor. B-D. The axial T1-weighted (B) and T2-weighted (C) MR images show a well-circumscribed soft-tissue mass (arrows) of low signal intensity on both sequences in the radial aspect of the proximal phalanx of the right 3rd finger. The axial contrast-enhanced T1-weighted fat-saturated image (D) shows mild heterogeneous enhancement (arrow) with focal irregular areas of non-enhancement (open arrow). E. The intraoperative photograph shows a multilobulated mass without invasion into the extensor tendon. F. The gross appearance of the tumor shows a well-circumscribed, multilobulated mass with a smooth surface. G. Photomicrograph of the histopathologic specimen shows scattered spindle to stellate-shaped cells in a hypovascular collagenous matrix without atypia or mitoses (H & E staining, × 200).

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