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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.
Figures and Tables
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).
References
1. Marinelli M, Lupetti E, Gigante A, Mandolesi A, Bearzi I, de Palma L. Collagenous fibroma of the deltoid muscle: clinical, surgical and histopathological aspects. J Orthop Traumatol. 2007. 8:91–94.
2. Walker KR, Bui-Mansfield LT, Gering SA, Ranlett RD. Collagenous fibroma (dsemoplastic fibrblastoma) of the shouder. AJR Am J Roentgenol. 2004. 183:1766.
3. Fong F, Odell E, Simo R. Collagenous fibroma (desmoplastic fibroblastoma) of the neck presenting with neurologic symptoms. Head and Neck Pathol. 2009. 3:47–50.
4. Evans HL. Desmoplastic firoblastoma: a report of seven cases. Am J Surg Pathol. 1995. 19(9):1077–1081.
5. Nielsen GP, O'Connell JX, Dickersin GR, Rosenberg AE. Collagenous fibroma (desmoplastic fibroblastoma): a report of seven cases. Mod Pathol. 1996. 9:781–785.
6. Miettinen M, Fetsch JF. Collagenous fibroma (desmoplastic fibroblastoma): a clinicopathologic analysis of 63 cases of a distinctive soft tissue lesion with stellate-shaped fibroblasts. Hum Pathol. 1998. 29:676–682.
7. Lydia K, Thomas D, Eyiyemi O. An unusual cause of subacromial impingement: a collagenous fibroma in the bursa. J Shoulder Elbow Surg. 2010. 19:e15–e17.
8. Ogose A, Hotta T, Emura I, Higuchi T, Kusano N, Saito H. Collagenous fibroma of the arm: a report of two cases. Skeletal Radiol. 2000. 29:417–420.
9. Beggs I, Salter DS, Dorfman HD. Synovial desmoplastic fibroblastoma of hip joint with bone erosion. Skeletal Radiol. 1999. 28:402–406.
10. Shuto R, Kiyosue H, Yuko H, Miyake H, Kawano K, Mori H. CT and MR imaging of desmoplastic fibroblastoma. Eur Radiol. 2002. 12:2474–2476.
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