Malignant Solitary Fibrous Tumor of the Scalp

Abstract

Solitary fibrous tumors are an uncommon slow growing benign neoplasm originally described as a pleural neoplasm but can also be found in the lung, mediastinum, peritoneum, or any other sites including the head and neck. Case ReportA 37 year old female presented to the Oral and Maxillofacial Surgery clinic complaining of a bump on her posterior scalp. She was referred to our clinic by general surgery for evaluation and removal of this lesion. She states that the lesion had slowly begun to increase in size approximately 2 years ago, but was first noticed approximately 4 years ago. She stated that the lesion was very uncomfortable for her and hurt at times when sleeping. On clinical examination, there was a well-circumscribed mass at the right occipital quadrant. The lesion was approximately 5 9 6 cm in size. It was soft, not fluctuant, with a sessile base and mildly tender to palpation. No overlying erythema or ulceration was noted.It was difficult to ascertain the mobility of the lesion due to the location in the posterior occipital region and the thickness of the scalp tissue but appeared to be mobile. No neurological deficits were noted. A Computed Tomography (CT) scan was performed, revealing a well circumscribed 65 mm 9 30 mm 9 60 mm right parietal soft tissue mass of heterogeneous densities which was contiguous with the calvarium over 50 mm without bony erosion or remodeling and sharply defined from adjacent soft tissues (Fig. 1). After the risks, benefits, and alternatives were discussed with the patient, informed consent of excisional biopsy was signed. The patient was then prepped and draped in the standard sterile fashion. An incision was made using a #15 blade taking an elliptical portion of tissue overlying the lesion. After initial dissection, it was noted that the lesion

Recurrent malignant solitary fibrous tumor of the scalp: a case report and literature review

“…Cutaneous SFT is an extremely rare neoplasm, presenting as a painless, superficial, and well-circumscribed mass that can be confused clinically with lipoma or epidermal cyst [3]. A summary of previously reported cases of scalp SFT and the current one is illustrated in Table 1 [13][14][15][16][17][18][19][20][21][22][23][24]. Confirming a diagnosis of unusual skin and soft tissue mass lesions, including SFT, is challenging and requires careful sampling of the tumor mass followed by careful pathological examination [25,26].…”

A Rare Case of Malignant Solitary Fibrous Tumor on the Scalp

“…As with SFT at other sites, malignant SFTs of the scalp are rare, with just two cases reported. The first case was reported by Shirley et al and presented a patient with a right parietal scalp mass that was resected completely and diagnosed as malignant SFT [11]. The second case was reported by Rabie et al and involved a recurrent malignant SFT on the occipital scalp that was diagnosed as dermatofibrosarcoma after the first operation; however, the recurrent mass was diagnosed as malignant SFT [10].…”

“…Among the various sites of origin, SFT originating from the scalp has been reported in 16 cases [6][7][8][9]. In contrast, malignant SFTs with a scalp origin are extremely rare, with only two cases reported in the literature [10,11].…”