J Korean Soc Radiol.  2014 Mar;70(3):221-224. 10.3348/jksr.2014.70.3.221.

Desmoplastic Fibroblastoma of the Foot: A Case Report

• Lee JY
• Park NH
• Park CS
• Seong SO
• Kwon TJ

• KMID: 1839437
• DOI: http://doi.org/10.3348/jksr.2014.70.3.221

Abstract

The desmoplastic fibroblastoma is a unique fibrous soft tissue tumor which shows clinically and morphologically distinct characteristics. Most of the desmoplastic fibroblastomas arise from the extremities, shoulder girdle, posterior neck, upper back or abdominal wall. This tumor resembles histological a desmoid tumor. However, it is much better microscopic circumscribed. The clinical outcome after a surgical resection is better than that of a desmoid tumor. We will report about imaging findings of a desmoplastic fibroblastoma which raised in the foot with a review of the relevant literature.

MeSH Terms

Abdominal Wall
Extremities
Fibromatosis, Aggressive
Foot*
Magnetic Resonance Imaging
Neck
Shoulder

Figure

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  Fig. 1 A 44-year-old man presenting with palpable mass in his left foot. A. The plain lateral radiographs of the foot shows a well marginated soft tissue density lesion (arrow). There is no evidence of internal calcification. B. The axial T1-weighted image shows an hypointense lesion compared to the adjacent normal muscle. It is well circumscribed, and was located beneath abductor hallucis muscles and medial to flexor digitorum brevis muscle. The lesion had mass effect upon adjacent muscles. C. The axial T2-weighted image shows a hypointense lesion with internal high signal intensity foci. D. The axial T1-weighted image after gadolinium contrast administration shows minimal or no enhancement. E. Surgical specimen shows a well marginated encapsulated grey-purplish firm mass measured as about 2.5 cm in its longest diameter. F. The cut surface appears hemorrhagic at the periphery and glistening gray-to-white aspect and bulging at the center. G. Low-power microscopic specimen shows fibrous and myxocollagenous areas. The tumor border is well defined. Fibrous area in the center of the tumor demonstrates wavy and dense collagen fibers. Cellularity is very low, consisting of spindle-shaped and stellate tumor cells. The periphery appears as a capsule-like covering of loose fibrous tissue (H&E stain, × 100) H. High power microscopic specimen of the fibrous center of the tumor shows monotonous spindle shaped fibroblasts with slender nuclei interspersed in the hyaline stroma of thick, wavy bands of collagen fiber with low cellularity (H&E stain, × 400).

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