Desmoplastic fibroma of the rib with cystic change: a case report and literature review

Subcutaneous fibroblastoma resembling hemangioma: A case of benign tumor of the chest wall

Key Clinical Message

Desmoplastic fibroma presents similar to other soft tissue tumors to such an extent that even a gold standard investigation can miss.

Abstract

This is to report a mass in a 47-year-old male arising from the chest wall, which was first thought to be a hemangioma but was later diagnosed as a case of desmoplastic fibroblastoma with the help of a biopsy.

Successful Treatment of a Case of Desmoplastic Fibroma: A Case of Unusual Lesion

Desmoplastic fibroma (DF) is a non-metastatic primary bone tumor that is extremely rare with local aggressive behavior. To the best of our knowledge, only few cases were published discussing this type of tumor and its management. This case report aimed to discuss a novel case as well as its management scheme. We present a case of a 36-year-old male with DF lesion involving the proximal tibial who underwent an extended curettage, triple type of adjuvant thereby, and internal fixation.

Desmoplastic fibroma of the jaw bones: A series of twenty-two cases

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In desmoid-type soft tissue fibromatosis we could see the beta-catenin in the nuclei of neoplastic cells as a diagnostic feature.

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Beta-catenin in the nuclei of neoplastic cells could not be detected in the present DF series.

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Most of the DF cases expressed only cytoplasmic beta-catenin immunostainings.

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Immunohistochemical staining difference of jaw bone desmoplastic fibromas from other soft tissue and bone lesions may be related to the origination of jaw bone from the neural crest.

Desmoplastic fibroma (DF) is an intraosseous counterpart of desmoid-type soft tissue fibromatosis. It is most frequently seen in the jawbones. The clinical and radiological features of the present cases were nonspecific. The accumulation of beta-catenin in the nuclei of neoplastic cells which is a diagnostic feature of desmoid-type soft tissue fibromatosis could not be detectED in the present DF series. The aim of this study is to report a series of 22 cases of DF involving either mandible or maxilla. A retrospective evaluation of desmoplastic fibroma and beta-catenin, smooth muscle actin, nestin, cyclin D1 immunostaining’s patterns.

Most of the DF cases expressed only cytoplasmic beta-catenin immunostainings. We suggest that nuclear beta-catenin staining may not be used as a corroborating the diagnosis of DF. Immunohistochemical staining difference of jaw bone desmoplastic fibromas from other soft tissue and bone lesions may be related to the origination of jaw bone from The neural crest. Strong nestin and cyclin D1 positivity in our series supported this. A combined clinical, radiological, and histopathological analysis of the DF cases is essential in the diagnosis and management.

Low-grade central fibroblastic osteosarcoma may be differentiated from its mimicker desmoplastic fibroma by genetic analysis

Background

We studied two cases of rare fibrous bone tumors, namely desmoplastic fibroma (DF) and low-grade central osteosarcoma (LGCOS) resembling desmoplastic fibroma (DF-like LGCOS). As the clinical presentation, imaging features and histopathology of DF and DF-like LGOS show much overlap, the objective of this study was to investigate the value of cytogenetic analysis, molecular pathology and immunohistochemistry in discrimination of these two mimickers.

Case presentation

A mutation in CTNNB (S45F) and nuclear beta-catenin immunostaining were observed in DF. DF-LGCOS had amplification of CDK4 and showed strong nuclear expression of CDK4 by IHC. Moreover, the karyotype of DF-LGCOS showed an interstitial heterozygous deletion of the long arm of chromosome 13 (q12q32), associated with loss of the RB1 tumor suppressor gene.

Conclusions

Karyotyping and molecular genetic analysis may contribute to a conclusive diagnosis.

Collagenous fibroma of the right coronary cusp: a case report and literature review

Collagenous fibroma (desmoplastic fibroblastoma) is a rare benign tumor. This type of tumor mostly occurs in the subcutaneous tissues or skeletal muscle, and to the best of our knowledge, there is no unique case report of it occurring in the cardiac valves. This is the first description of collagenous fibroma in a human heart.