1/57. Desmoplastic fibroma of the calcaneus treated with a microvascular bone graft. Case report. A calcaneal desmoplastic fibroma in a 24-year-old woman had previously been treated with repeated curettage and bone grafting. Because of a larger recurrence a microvascular bone reconstruction was carried out using an osteofascial radial forearm flap. She could walk without pain in one year. It has not recurred during a five-year follow-up period. ( info) |
2/57. Desmoplastic fibroma of the zygoma. Desmoplastic fibroma is an exceedingly rare primary bone tumor. Previous reports have not included the presentation of this tumor associated with the zygoma. This report describes the unusual presentation and surgical management of a desmoplastic fibroma of the zygoma. ( info) |
3/57. Collagenous fibroma (desmoplastic fibroblastoma): genetic link with fibroma of tendon sheath? We observed clonal chromosome abnormalities in two fibrous soft tissue tumors diagnosed as collagenous fibroma (desmoplastic fibroblastoma). The involvement of the same band of the long arm of chromosome 11, 11q12, was observed in both tumors. The presence of hitherto unreported similar chromosomal abnormalities in this tumor supports the neoplastic nature of this lesion. In addition, a possible relationship with fibroma of tendon sheath, which also shows rearrangement of 11q12, is suggested. 11q12 might be a common genetic denominator of benign fibroblastic lesions, such as collagenous fibroma and fibroma of tendon sheath. ( info) |
4/57. Collagenous fibroma (desmoplastic fibroblastoma). Collagenous fibroma (desmoplastic fibroblastoma) is a recently described tumor that may arise in the subcutaneous tissue or skeletal muscle. We report a case of collagenous fibroma, occurring on the forehead of a 67-year-old man. An awareness of this entity is necessary to avoid confusion with other soft tissue neoplasms, especially extraabdominal fibromatosis. ( info) |
5/57. Unique desmoplastic cerebral tumor in a patient with complex partial seizures. Primary brain tumors with prominent desmoplasia include the gliofibroma, desmoplastic infantile ganglioglioma (DIG), pleomorphic xanthoastrocytoma (PXA), and desmoplastic cerebral astrocytoma. In the present report, we describe unusual pathological appearances in two successive resections of a left temporal tumor in a patient with complex partial seizures. Both tumors showed focal astroglial and very prominent neuronal differentiation. In the first resection at age 11 years, the tumor showed only focal desmoplastic areas and prominent neuronal differentiation with bizarre atypical giant cells. In the second resection at age 14 years, the morphology was dramatically different. Now the tumor showed marked desmoplasia with tumor cells coexpressing neuronal and glial markers. Electron microscopy showed prominent neuronal differentiation in both resections and presence of basal lamina around tumor cells. Our case represents a unique example of an extraordinary degree of neuronal differentiation in a desmoplastic cerebral tumor. While cellular pleomorphism in a desmoplastic tumor traditionally suggests the diagnosis of PXA, we wish to underscore that many cells exhibiting marked cytologic atypia may in fact be of neuronal rather than of glial origin as in our case. ( info) |
6/57. Synovial desmoplastic fibroblastoma of hip joint with bone erosion. A 78-year-old woman presented with pain at the left hip. Initial radiographs showed minimal age-related changes. Over the next 2 years she developed large erosions in the left femoral neck and proceeded to hip replacement. Histological examination showed bland spindle cells in a loose and hyalinised collagenous stroma considered to represent a desmoplastic fibroblastoma (collagenous fibroma). This is the first reported case of synovial desmoplastic fibroblastoma. ( info) |
7/57. Desmoplastic fibroma of the mandible: report of a case. This paper describes a case of desmoplastic fibroma in a 4-year-old patient with a history of a small slowly growing swelling at the right angle of the mandible over a 3-month period. Desmoplastic fibroma was diagnosed on histological and immunohistochemical bases. The lesion responded well to thorough curettage and has not shown signs of recurrence 3 years after the surgical intervention. The clinical picture, the pathology and the management of the case are described, and the differential diagnosis and treatment are discussed. ( info) |
8/57. Collagenous fibroma (desmoplastic fibroblastoma) presenting as a parotid mass. We describe the case of a 50-year-old man who was found to have a painless, slow-growing parotid mass of 10 months duration. At surgery, a well-delimited, lobulated 4x5-cm tumor was located on the deep lobe of the left parotid gland, adhering to the parotid sheath and masseteric fascia. Follow-up 6 years later has shown no evidence of recurrence. Cardinal morphologic features included multiple nodules of sparsely distributed stellate-or spindle-shaped fibroblasts within a collagenous or myxocollagenous stroma. Fascial involvement and entrapment of salivary gland were focally identified at the edges. Tumor cells were diffusely positive for vimentin with faint focal staining for alpha-smooth muscle actin. These findings satisfied the diagnostic criteria for collagenous fibroma (desmoplastic fibroblastoma). Ours represents the first report of this tumor type mimicking a parotid tumor. ( info) |
9/57. MR findings of desmoplastic fibroma of the spine. A case report. We report on the MR imaging findings in a case of spinal desmoplastic fibroma (DF). DF of the bone is a rare, locally aggressive tumor. It is commonly located in long bones, pelvis or mandible. DF involving the spine is extremely rare and difficult to distinguish from other bony lesions such as giant cell tumor, chordoma and fibrous dysplasia of the spine. This case of DF of the spine showed MR findings similar to those of DF arising in the metaphysis of a long bone. ( info) |
10/57. Desmoplastic fibroma of bone: MRI features. Desmoplastic fibroma of bone is a very rare benign tumor, which may be locally aggressive. In contrast to the well-documented radiological appearance, the literature on MR imaging features of this tumor is scarce. The MR imaging characteristics in our case are compared to those previously reported. Although there is a considerable overlap in the MR imaging features with other bone tumors, an interesting MR feature of desmoplastic fibroma is the presence of low to intermediate signal intensity foci on T2-weighted images, which radiographically does not correspond to calcifications. This feature may help narrow the differential diagnosis. ( info) |