386 Fibrous Histiocytoma of the Hard Palate – Clinico-Pathological Description of a Rare Tumour with Literature Review
S Sawhney, Z M Zhou, A Amin, S Mumtaz, J Lee, I Proctor- Surgery
Abstract
Introduction
Fibrous histiocytoma (FH) is a commonly reported soft tissue tumour which can occur ubiquitously in the body. However, its presence is incredibly rare in the oral cavity. When they do occur, they usually present as painless nodular growths with sessile base in the buccal mucosa. Diagnosis is confirmed through clinical, histopathological and immunohistochemistry analysis.
Method
The description of this condition is undertaken by presentation of a clinical case & findings, histopathological and immunohistochemical features, literature review and relevance to the oral and maxillofacial surgeons and pathologists.
Results
A 66-year-old man presented with an exophytic smooth mass of the hard palate affecting his ability to eat. The lesion was excised with a 2 mm margin and sent for histopathological evaluation. This was reported to have contained mixed population of histiocytes, foamy macrophages/xanthoma cells and plump spindle shaped cells arranged in storiform pattern confirming benign FH. Only 59 cases of the oral variant of this lesion have been published in literature and only 7 of these cases were found on the palate. There is a slight male predilection and occurrence between 3rd and 4th decade of life. The risk of recurrence after excision can be between 5-10% cases mainly due to incomplete excisions. Malignant transformation is rare.
Conclusions
Oral FH is an uncommon diagnosis for a soft tissue palatal lesion. Clinicians should have sufficient awareness of these rare lesions and consider them in the surgical sieve when dealing with soft tissues lumps of the oral cavity.