Benign Fibrous Histiocytoma: A Rare Case Report and Literature Review

A Case Report of a Benign Fibrous Histiocytoma: A Post-mosquito Bite Reaction

Fibrous histiocytomas can be differentiated into malignant fibrous histiocytoma or benign fibrous histiocytoma (BFH) and may involve soft tissue and hard bony tissue. A BFH is a rare group of tumors involving fibrocystic and histiocytic elements. Although BFH after a mosquito bite is rare, it must be a part of the differential diagnosis in unresponsive cases of insect bite reactions. A 57-year-old woman with a history of hypertension arrived at the clinic to discuss an 18-year-old lump in her left leg. The patient described the mass as painless and immobile on the anterior part of the left leg. She stated that it had started with a mosquito bite 18 years ago. The woman visited the clinic after her cat scratched the nodule and the erythema on the anterior area of her leg intensified. Physical examination revealed a 10 × 5 × 5 cm solid, stemmed, non-tender mass with erythema on the left leg. A CT scan revealed a stemmed soft tissue mass with well-defined borders. BFH is one of the common types of histiocytoma that is differentiated based on location, which can be dermis, subcutaneous tissue, and deep soft tissues. BFH is predominantly common in young-to-middle-aged females compared to males. BFH can emerge anywhere on the body. However, the occurrence on the lower extremities is high. This case is presented for its rarity and uncommon site of involvement and the significant clinical presentation and emerging condition following a mosquito bite.

Benign Fibrous Histiocytoma of Larynx: A Rare Case Report

The Fibrous histiocytoma is one of the mesenchymal tumors that can present as malignant or benign. We reported a 30 years old male, a rare case of benign fibrous histiocytoma of larynx and evaluated the clinical and histological aspect of this patient.

Multiple benign fibrous histiocytomas of the mandible: A case report and review of the literature

Benign fibrous histiocytoma (BFH) mostly occurs on the skin of the extremities, while it is unusual to manifest on the bone and mandibular involvement of BFH is even rarer. The present study reports a case of BFH in a 42-year-old female who had a slowly progressive swelling of the bilateral mandible and slight facial asymmetry over a period of 4 months. However, the outcome of this patient was unsatisfactory, with the first and second recurrence observed 16 and 46 months after surgery, respectively. The present case suggests that BFH has a risk of recurrence after transoral curettage. Regular follow-up is advised to detect tumor recurrence after the surgery of transoral curettage.

Benign fibrous histiocytoma of the oral and maxillofacial region: A systematic review

OBJECTIVE

The aim of the present study was to carry out a systematic review of available data regarding case reports and case series of oral and maxillofacial benign fibrous histiocytoma (BFH).

STUDY DESIGN

A search strategy was performed using the PubMed, Web of Science, Scopus, and EMBASE electronic databases.

RESULTS

Male individuals (56.89%) were more affected, with a mean age of 34.55 ± 20 years. The buccal mucosa (20.33%) represented the most common site, with the clinical presentation of a painless (86.95%) nodule (98.03%). The clinical hypothesis of a fibroma was reported in most cases (31.57%). Radiographic presentation of intraosseous lesions showed multilocular radiolucent images (55.55%). Regarding the histopathologic features, the biphasic population of fibroblastic and histiocytic cells was seen in 21 cases (39.62%), and a spindle-shaped fibroblastic cell population organized into a storiform pattern was observed in 25 cases (47.16%). CD68 (n = 26) and vimentin (n = 25) showed immunoreactivity in all BFH cases in which they were used. All cases were treated with a surgical resection, and 8.10% recurred.

CONCLUSIONS

The current systematic review demonstrated that BFH represents a rare lesion that mainly affects the buccal mucosa of male individuals, and the treatment is mainly surgical with a good prognosis.

A rare presentation of benign fibrous histiocytoma in the maxilla

Fibrous histiocytoma is a soft-tissue tumor that may present as a fibrous mass anywhere in the human body. The involvement of the oral cavity is rare. We here report a case of benign fibrous histiocytoma localized in the maxilla. A 25-year-old male presented with a slowly increasing large painless mass over the left side of the upper jaw for 5 months. The swelling was of gradual onset, slowly progressive and was not associated with pain, tenderness, or discharge. The radiographic appearance showed a multilocular mixed radiodense, radiolucent lesion in the left posterior maxilla. The histopathological report showed connective tissue component having streaming fascicles of spindle-shaped cells showing a storiform pattern. Many areas showed foamy histiocytes along with few multinucleated giant cells. The cells were appearing benign without any appearance of atypia. The tumor cells were positive for CD-68 and vimentin and negative for CD-34 and S100. The lesion was excised under general anesthesia.

Benign fibrous histiocytoma of the lower lip

The fibrous histiocytoma is a soft-tissue neoplasm of the biphasic cell population of fibroblasts and histiocytes that affects the dermis and the subcutaneous tissue. The objective of this article is to report a case of benign fibrous histiocytoma (BFH) of the lower lip in a 32-year-old female patient with a chief complaint of swelling in the lower lip for the past 1 month. With diagnostic clinical hypothesis of fibrous hyperplasia, fibrous histiocytoma and mucocele, an excisional biopsy was performed. The histopathological examination revealed a nonencapsulated proliferation of spindle cells with some giant multinucleated cells in the periphery of the lesion. Multinucleated giant cells and lymphocytes were noted throughout the lesion. Immunohistochemical reactions were performed, staining only CD68 in the multinucleated giant cells. According to these characteristics, the final diagnosis was BFH.

Fibrous histiocytoma as first presentation in systemic lupus erythematosus and sero-positive Sjögren's syndrome

Purpose

To describe a triad of fibrous histiocytoma, Systemic Lupus Erythematosus and Sero-positive Sjögren's Syndrome.

Observations

This case was diagnosed first as bilateral fibrous histiocytoma of cheeks, which on further investigations proved to be a triad of Systemic Lupus Erythematosus, Fibrous histiocytoma and Sero-positive Sjögren's Syndrome.

Conclusions and importance

Association between fibrous histiocytoma, Systemic Lupus Erythematosus and Sero-positive Sjögren's Syndrome has been known before, but fibrous histiocytoma as first presentation in the triad has not been reported.