Solitary intraosseous neurofibroma: Report of a unique case

Nonsyndromic Extraosseous Palate Neurofibroma of a 30-Year-Old Woman: A Case Report

Neurofibroma (NF) is a benign peripheral nerve sheath tumor which consists of Schwann cells, perineurial-like cells, and fibroblasts. The NF can be central or peripheral, alone or multiple which is a manifestation of Type I neurofibromatosis. NFs are mostly found in the tongue, oral mucosa, and lips when appearing in the mouth cavity, but they are rare at palate in a solitary form. We report a case of a solitary NF originating in the hard palate in a 30-year-old woman. The patient had an asymptomatic, nonulcerated, sessile, pink, and smooth nodule measuring 15 × 25 × 5 mm with a firm consistency and defined border on the left side of the posterior part of the hard palate. She had a similar history about 12 years ago which was diagnosed as a benign myxoid tumor which was excised that time. The lesion was excised with a 3-mm safe margin. The periosteum was excised, but the palatal bone was intact and was not excised. IHC was positive for S-100 immunostaining. Eventually, the mass was diagnosed as a NF. The important point is that following the patient with NF is necessary, because it could be the primary sign of Type I neurofibromatosis. The follow-up of this patient is continuing, and until the accomplishment of this report, no relapse was evident.

Intraosseous benign peripheral nerve sheath tumor of the jaws: report of 4 new cases and a comprehensive literature review

Benign peripheral nerve sheath tumors (BPNSTs) are a vast, common, heterogeneous group of lesions that are often diagnostically challenging. The head and neck region is recognized as the second most common location for these lesions, especially the tongue. However, BPNSTs occurring centrally within the jaw bones are exceedingly rare. To date, approximately 161 cases of intraosseous BPNSTs have been reported in the jaws. This group mainly includes the relatively more common neurofibromas and schwannomas, and the less common perineuriomas and hybrid forms. Unlike soft tissues, schwannomas are the most common BPNSTs occurring within the jaws, followed by neurofibromas and perineuriomas. These neoplasms can present as a well-defined unilocular lesion or as an ill-defined multilocular image, resembling several types of benign and malignant lesions of odontogenic origin. The aim of the current study was to report 4 new cases of intraosseous BPNSTs and a comprehensive literature review.

Clinical, Radiographic, and Tumor Characteristics of Solitary Intra-Osseous Neurofibroma of Jaws- A Systematic Review

Neurofibroma is a benign tumor of the peripheral nervous system affecting Schwann cells as well as neural sheath cells. It is usually considered as a component of Von Recklinghausen's disease, but solitary lesions have also been reported, though not very frequently. It is mostly reported on the skin. In the head and neck region, trigeminal nerve and the cervical nerves are frequently affected; in the oral cavity, tongue is the most commonly affected site. Intra-osseous neurofibromas of the oral cavity are extremely rare and only 22 cases have been reported in the last two decades. The present review is an attempt to know if there is any clinical or radiological feature that can assist in the diagnosis of solitary intra-osseous neurofibroma of the jaws? The literature was reviewed from 01.01.2000 to 05.06.2022 exclusively for case reports, case series, and reviews using the keywords: neurofibroma; neurinoma, maxilla; mandible; jaws, single; solitary; one. Search engines: PubMed Central, Lilac, and Science Direct were used by applying the Boolean operator "OR" and "AND". The review has been submitted for registration in PROSPERO (receipt 340775).

Solitary intraosseous neurofibroma in the mandible mimicking a cystic lesion: A case report and review of literature

BACKGROUND

Neurofibromas are benign tumors of a neurogenic origin. If these tumors occur without any other signs of neurofibromatosis, they are classified as isolated neurofibromas. Neurofibromas in the oral cavity mostly occur within soft tissues, indicating that solitary intraosseous neurofibromas in the mandible are rare. Due to the absence of specific clinical manifestations, early diagnosis and treatment of these tumors are difficult to achieve.

CASE SUMMARY

A 37-year-old female patient visited our hospital due to numbness and swelling of the gums in the right lower molar area that had persisted for half a month. The patient's overall condition and intraoral examination revealed no significant abnormalities. She was initially diagnosed with a cystic lesion in the right mandible. However, after a more thorough examination, the final pathological diagnosis was confirmed to be neurofibroma. Complete tumor resection and partial removal of the right inferior alveolar nerve were performed. As of writing this report, there have been no signs of tumor recurrence for nine months following the surgery.

CONCLUSION

This case report discusses the key features that are useful for differentiating solitary intraosseous neurofibromas from other cystic lesions.

Solitary Neurofibroma of Mandible in a 2-Year-Old Child: A Rare Case Report and Review of Literature

Solitary intraosseous neurofibromas of mandible are very rare and only 40 cases are documented. This case report presents one of the youngest documented case of solitary neurofibroma of mandible, in a 2-years old male child. The tumour was symptomatic and presented as a swelling over right posterior region of mandible. The patient underwent conservative excision under general anaesthesia. The inferior alveolar nerve was preserved. Histopathology was suggestive of benign nerve sheath tumour. Immunohistochemistry showed moderate S-100 and strong CD34 positivity. Postoperative healing was uneventful. This report also reviews forty previously reported cases of solitary intraosseous neurofibromas of the mandible.

A Rare Incidence of Metachronous Neurovascular Lesions in a Child

Neurofibroma is an uncommon benign tumor arising from nerve sheath fibroblasts. The diagnosis of solitary lesions becomes difficult in patients who do not have any family history of neurofibroma. An intra-oral solitary neurofibroma comprises 6.5% of reported cases of neurofibroma. Few cases of intraosseous solitary neurofibroma have been published as per literature. Treatment-surgical resection of tumor has an excellent prognosis with extreme rare malignant transformation which is more commonly seen in neurofibromatosis. A periodic follow-up is necessary in solitary tumors to rule out syndromic cases. Leiomyoma is a benign tumor of smooth muscle origin, which is usually diagnosed in the gastrointestinal tract, uterus, and skin. The most effective treatment for solid, vascular, and epithelioid angioleiomyomas is surgical resection along with tumor capsule. Here we report an uncommon occurrence of multiple benign tumors in a pediatric patient.

Mandibular neurofibroma: Case report of a rare tumor

Neural tumors localized in jaw bone are relatively rare. This article presents a case of intraosseous neurofibroma of the mandible in a 37-year-old female patient. A review of clinical, radiographic, histological features and surgical management of the patient are discussed along with a review of the literature.

Trigeminal neurofibroma in the infratemporal fossa arising from the inferior alveolar nerve: A case report

Solitary neurofibromas arising from cranial nerves are rare, and those arising from the peripheral divisions of the trigeminal nerve are even rarer. Although infratemporal fossa (ITF) masses are challenging to remove, certain approaches are considered feasible for this region. The present study reports a rare case of an ITF neurofibroma arising from the inferior alveolar nerve. The 27-year-old male patient presented with numbness of the right jaw. A radiological examination revealed a large mass occupying the ITF, from the mandible to the foramen ovale, originating from the inferior alveolar nerve in the mandible. The tumor was successfully excised via a transtemporal approach followed by a transoral-retromolar approach. A histological examination confirmed the diagnosis of neurofibroma. The present case demonstrates that a combination of the transtemporal and transoral-retromolar approaches may provide wide access to the ITF region.

Intraosseous Neurofibroma of the Mandible: A Case Report and Review of Literature

Neurofibroma (NF) is a benign tumor of the peripheral nervous system. Head and neck NF are generally located in the soft tissue. The tumour is rarely seen intraosseously and most commonly such tumours are seen as solitary lesions, rather than part of neurofibromatosis. The following report describes a case of an intraosseous neurofibroma in a 45-year-old male located in the left posterior mandible. The diagnosis was made based on the clinical findings, radio graphical features, histopathology, and immunohistochemistry. A literature review has been done on intraosseuos neurofibromas located in the jaws, with a discussion on the possible differential diagnosis.

The Solitary Variant of Mandibular Intraosseous Neurofibroma: Report of a Rare Entity

Neurofibroma (NF) is a benign neoplasm derived from peripheral nerve cells. NF may extend either as a solitary lesion or as part of a generalized syndrome of neurofibromatosis. Intraorally, the intraosseous variant of neurofibroma is a very rare tumor. The literature provides only few cases of solitary intraosseous neurofibroma of the mandible. We report a case of 28-year-old female who was diagnosed with a solitary intraosseous neurofibroma involving the lower left quadrant of the mandible. The present case is rare in regard to its dimensions and its location.