## 3 Discussion  
Oral neural tumours (ONT/NOT) are rare in the oral cavity. Most commonly, they are related to the reactive or neoplastic proliferation of nerve sheath cells [18]. During clinical examination, their shape, appearance, and features can mimic any other cyst or tumour within the oral cavity. However, a detailed histopathological examination is the most accurate diagnostic tool to ensure a detailed diagnosis [19]. According to some authors, the most common ONTs are granular cell tumours, neurofibroma, schwannoma, traumatic neuroma, palisaded encapsulated neuroma, and nerve sheath myxoma [18; 19; 20]. They are found in less than 1% of oral lesions, while their aggressive malignant forms are quite uncommon, occurring in approximately 0.02% of oral lesions [18; 19; 20]. Nevertheless, their occurrence might lead to many diagnostic dilemmas and challenges. MRI can easily exclude any malignant pathologies, nerves, tissues, or surrounding tissue infiltration or establish if the mass has well-defined borders. In the presented case, the authors first suspected the rare occurrence of a pleomorphic adenoma and, second, an odontogenic-like peripheral ossifying fibroma consisting of mixed fibrous bone with an elastic appearance. MRI with contrast enhancement could improve the diagnosis because of clear visualisation  
Figure 9: Cone-beam computed tomography after three years in the sagittal plane showing good healing of the bone superiorly placed from the remnants of the molar crown. Adjacent second molars and adjacent bone without any radiological changes in their structure. of the margins, borders, and location in the tissues, and some papers confirm this [21]. The adjacency of the tumour to the mandibular body requires CBCT. Very few papers on such MRT locations of SCs are available. One of the studies reported a 70-year-old male with the same anatomical occurrence of this lesion; however, in this case, CBCT was also used because a tumour other than an SC was suspected [22]. On the other hand, when an atypical and rare retromolar tumour in soft tissues is suspected, MRI with contrast enhancement is more precise than any other diagnostic evaluation [23]. The cases by [PERSON] and [PERSON] were some of the first to describe this rare intraoral MRT SC, and, so far, just a few similar cases are known in the world literature [22; 23]. A schwannoma in the mandibular retromolar area is a very rare and atypical finding, especially when its position near the retained molar might suggest an odontogenic lesion (follicular cyst, eruption cyst, odontogenic keratocyst-OKC, and others), while the presence of small salivary and mucous glands in the following areas might suggest a salivary gland tumour (MEC-mucoepidermoid carcinoma, tumour mixtus (pleomorphic adenoma), ACC-adenoid cystic carcinoma, or others). CBCT evaluation of the following lesions should establish any intra/extraosseous spread and the status of cortical bone, which is important for differential diagnostic purposes. CBCT/MR can improve the value of any diagnostic imaging technique, while clinical examination remains equally important, especially for solid lesions, cystic lesions, tender lesions, movable lesions, ulcerations, or lesions with other possible features. It is worth noticing that some authors recommend a biopsy, and others an excisional biopsy, while some recommend improved diagnostics with MRI; however, only large ONTs with cortical bone infiltrations or erosions should be scheduled for more radical osteectomies, bone resection, or other procedures [5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24]. A detailed differential diagnosis should first be established if any lesion, cyst, or tumour in the oral cavity has odontogenic or nondondotogenic origins. CBCT is one of the most important diagnostic steps for evaluating bone and tooth structures in the oral cavity.