J Korean Soc Magn Reson Med.  2012 Dec;16(3):253-256. 10.13104/jksmrm.2012.16.3.253.

The MRI Findings of Collagenous Fibroma (Desmoplastic Fibroblastoma) Arising in the Supraspinatus Muscle: A Case Report

• Lim J
• Kim W
• Seo M
• Kim Y

• KMID: 2099861
• DOI: http://doi.org/10.13104/jksmrm.2012.16.3.253

Abstract

Collagenous fibroma (desmoplastic fibroblastoma) is a rare benign fibrous soft tissue tumor. This lesion commonly presents with painless, non-tender, mobile and slowly growing mass in subcutaneous tissue or skeletal muscle at various anatomic location. On magnetic resonance image (MRI), the mass shows area of low signal intensity on both T1- and T2-weighted pulse sequences. This low signal intensity presents areas of low cellularity in a background of abundant collagen. We describe the unique case of collagenous fibroma in the shoulder joint presenting with 4-years history of long-standing pain, which is unusual clinical manifestation of this benign soft tissue tumor without previous trauma history.

Keyword

Collagenous fibroma; Desmoplastic fibroblastoma; Shoulder; Magnetic resonance imaging (MRI)

MeSH Terms

Collagen
Fibroma
Magnetic Resonance Spectroscopy
Muscle, Skeletal
Shoulder
Shoulder Joint
Subcutaneous Tissue
Collagen

Figure

• 

  Fig. 1 A 62-year-old man with collagenous fibroma of the left supraspinatus muscle. a. Axial T1-weighted MR image of left shoulder shows a well-circumscribed and multilobulated soft tissue mass of intermediate to low signal intensity in the left supraspinatus muscle. b. Axial fat suppressed T2-weighted MR image shows heterogenous hypointensity to muscle with partial infiltration to supraspinatus muscle. c. Coronal fat suppressed T2-weighted MR image shows a low signal intensity mass (arrows) deep to the left supraspinatus muscle. d. Coronal fat suppressed T1-weight MR image after gadolinium administration shows no significant enhancement in the left supraspinatus muscle. e. Photomicrograph of the histopathologic specimen shows scattered stellate-shaped fibroblasts in abundant collagenous matrix (H & E stain, ×400).

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