A desmoplastic granular cell tumour of the oral cavity: report of a case

Oral granular cell tumors: an analysis of the clinical and histopathologic features of 126 tumors

OBJECTIVE

To characterize the clinical and histologic features of oral granular cell tumors (GCTs).

STUDY DESIGN

A retrospective search of the archives of our diagnostic oral pathology service was performed for GCTs diagnosed between 1989 and 2023. A total of 126 tumors in 122 patients were retrieved.

RESULTS

There was a female predilection with a female-to-male ratio of 2.3:1. The age range was 5-73 years (mean = 33.3). The most commonly involved site was the tongue (81.0%), followed by the lips (7.9%). Most GCTs were pink, but many lesions appeared yellow or white. Histologically, most GCTs were sessile masses comprised of sheets or nodules of tumor cells. Uncommonly, GCTs were pedunculated (3.2%), papillary (2.4%), ulcerated (3.2%), or desmoplastic (11.1%). Pseudoepitheliomatous hyperplasia, histologically mimicking squamous cell carcinoma, was present in 25.4% of tumors. While 65.9% of GCTs demonstrated positive surgical margins, only 3 tumors recurred.

CONCLUSIONS

To the best of our knowledge, this is the largest series of oral GCTs with a comprehensive analysis of the clinical and histologic features. It is important for clinicians and pathologists to be aware of the spectrum of features observed in GCTs in order to avoid erroneous classification as malignancy.

Unusual presentation of granular cell tumour of buccal mucosa

Granular cell tumour (GCT) is a rare soft tissue lesion which many consider to have malignant potential of yet unknown aetiopathogenesis. Oral GCT lesions may occur in an area of leucoplakia and are predominantly present on the tongue. This case study highlights an uncommon presentation of this condition located on the buccal mucosa and illustrates the need for meticulous evaluation of suspicious lesions. Due to the malignant risk associated with GCT lesions, it is important to make the correct diagnosis and ensure complete surgical excision for these cases. Ongoing long-term follow-up is also indicated to monitor for recurrence or malignancy.

Oral granular cell tumour: A multicentric study of 56 cases and a systematic review

OBJECTIVE

Granular cell tumour (GCT) is a benign neoplasm that originates from Schwann cells. Within the oral cavity, it usually appears as a lingual nodule and especially amongst female adults. Histologically, GCT shows a proliferation of polygonal cells with eosinophilic granular cytoplasm, which can be associated with a pseudoepitheliomatous hyperplasia (PEH). In this study, we analyse the main clinicopathological data of intraoral GCT and we compare our results with previous studies.

MATERIAL AND METHODS

We have studied a series of 56 cases of oral GCT in Spain and Brazil, and we have conducted a systematic review in PubMed, Web of Knowledge and Scopus databases, using the keywords: "granular cell tumour" and oral.

RESULTS

In our series, GCT appeared as an asymptomatic benign tumour that is more frequent in women and in the tongue. PEH was observed in 32% of the lesions. In the review, we collected 282 cases of oral GCT with a similar clinical profile; seven patients had multiple lesions, and 33% of the cases presented PEH. No cases of malignant oral GCT have been described to date. GCT is an uncommon oral benign neoplasm, mainly unique and asymptomatic, derived from Schwann cells.

CONCLUSIONS

Although the etiopathogenesis of this oral tumour is unknown, its characteristics suggest that it could have a reactive nature. Conducting a complete clinicopathological study in all intraoral GCT is fundamental in order to dismiss other entities, including oral carcinoma.

Granular cell tumour developing in the background of a previous mandibular giant cell lesion: Case report

INTRODUCTION

Granular cell tumours of the mandible are very rare. We present a unique case which has developed at the site of a previous giant cell lesion.

PRESENTATION

51 year old Caucasian lady had excision of a recurrent giant cell lesion of the anterior mandible. Follow up showed evidence of radiographic recurrence. However, further biopsies from the same site showed granular cell tumour with soft tissues extension. The patient remains well on long term follow up with no evidence of recurrence.

DISCUSSION

This case is unique because the granular cell tumour has evolved from the site of a recurrent giant cell lesion. Conservative surgical excision was an adequate treatment option.

CONCLUSION

Within the limitations of our case study, a correlation between granular cell tumour and giant cell lesion is possible. However, more research is needed to prove this.

S100 protein in oral biology and pathology

The demonstration of S100 protein is used extensively for both research and diagnostic purposes in oral biology and pathology. This article reviews the structure and putative function of S100, technicalities of S100 immunohistochemistry, the cells of the oral and perioral tissues which express S100 and the possible significance of S100 expression in disease.