Chondrosarcoma of the maxilla. Case report

Chondrosarcoma is a rare malignant neoplasm of the jaws. The diagnosis of this lesion is mainly based on the histopathological appearance. A case of chondrosarcoma of the maxilla is reported. The origin of this rare tumour in the maxilla, a bone with exclusive membranous ossification, is discussed.     

Chondrosarcoma of the maxilla. Case report

Chondrosarcoma is a rare malignant neoplasm of the jaws. The diagnosis of this lesion is mainly based on the histopathological appearance. A case of chondrosarcoma of the maxilla is reported. The origin of this rare tumour in the maxilla, a bone with exclusive membranous ossification, is discussed.     

Odontomes in an Australian population

In a series of 118 odontomes in an Australian population there were no sex differences in the prevalence of complex and compound lesions with regard to site, age or type of lesion. The odontomes were most commonly detected in the second decade, but a wide age range was evident. Complex odontomes were more common than compound, with equal frequency in the anterior maxilla and mandibular molar region. The most common site for compound odontomes was the anterior maxilla.     

Radiographic manifestations of a lung carcinoma with metastases to the anterior maxilla.

Radiographic examination of the facial bones frequently reveals osteolytic and osteoblastic changes. A case of undifferentiated large-cell carcinoma of the lung with metastasis to the anterior maxilla is reported. Intraoral dental radiographs revealed an ill-defined lytic area in the left anterior maxilla. The periphery of the lesion revealed saberlike extensions of bone extending into the lytic defect. Cytologic and biopsy studies of the oral mucosa led to identification of the tumor as an undifferentiated large-cell carcinoma of the lung.     

Peripheral osteoma of the maxilla: report of an unusual case

Peripheral osteomas of the maxilla are relatively rare. A case of a solitary peripheral osteoma of the anterior right maxilla in a 16-year-old girl is presented. The tumor was asymptomatic and was removed via an intraoral approach without any complications. Both hamartomatous and neoplastic factors have been advocated concerning the pathogenesis of such lesions, but no definite conclusion has been reported. Certain features of the case, such as obstruction of the eruption of the permanent canine, displacement of an adjacent tooth, intraoperatively noted infiltration of the interdental bone, and clearly abnormal histological bone structure might support the neoplastic nature of this lesion.     

Primitive neuroectodermal tumour of the maxilla. Light microscopy and ultrastructural observations

Primitive neuroectodermal tumour is a rarely encountered lesion, mainly occurring within the central nervous system. A case is reported in which the tumour was situated in the anterior maxilla. Light microscopy and ultrastructural features that made it possible to differentiate the lesion from other small round-cell tumours are discussed. Combined surgical and radiotherapeutic intervention proved to be successful in eradicating the neoplasm.     

Adenomatoid odontogenic tumor: a report of an unusual maxillary lesion.

Adenomatoid odontogenic tumor is an odontogenic tumor that appears in the anterior portion of the jaws and more frequently, in the anterior maxilla usually in association with the crowns of inclused teeth. A case report of adenomatoid odontogenic tumor with an associated impacted right maxillary first premolar is presented. Under general anesthesia the lesion and the impacted tooth were removed. There was no recurrence at the 1 -year follow-up.     

Surgical and orthodontic rapid palatal expansion in adults using Glassman's technique: retrospective study

In 1984, Glassman et al. described a conservative surgical method of separation of the midpalatal suture in which an osteotomy is done only at the lateral and anterior wall of the maxilla. Between 1991 and 1997, we have operated on 21 patients with maxillary transverse discrepancies using the method that they described. This gave good results in 20 patients. The other, who was operated on at the age of 38 years, developed a fracture of the alveolar process of the maxilla on one side because of ossification of the midpalatal suture. The surgically assisted rapid palatal expansion described by Glassman et al. is suitable for patients up to the age of 30. Older patients require additional surgical separation of the midpalatal suture.     

Central ossifying fibroma of the anterior maxilla: report of case

Central ossifying fibromas are well-documented, benign lesions usually found on the mandible and posterior maxilla. These lesions are differentiated from other fibro-osseous proliferations by specific clinical, radiographic, and histopathological criteria. An unusual case involving the anterior maxilla is described, including a review of the diagnostic features of the lesion as well as a discussion of its relationship to other fibro-osseous lesions.     

Heterotopic ossification in the maxillary sinus

We report a case of heterotopic ossification of the maxillary sinus in a 30-year-old female who was treated surgically in our department. Heterotopic ossification (HO) refers to the formation of mature lamellar bone in nonosseous tissues. We present the radiographic and computed tomographic appearance, and discuss the surgical treatment, histopathologic results, and differential diagnosis. To the best of our knowledge, no other case of HO of the maxillary sinus has been reported yet.     

Juvenile ossifying fibroma of the midface

Juvenile ossifying fibroma is an unusual maxillofacial fibro-osseous lesion characterized by cell-rich osteoid strands. A 7-year-old girl presenting with a massive juvenile ossifying fibroma of the maxilla resulting in facial deformity, orbital displacement, and extension into the anterior skull base is discussed. The importance of combining clinical, radiographic, and histopathological findings for the diagnosis and management of the tumor is discussed.     

Immediate dental implant failure associated with nasopalatine duct cyst

This case report presents an analysis of the clinical, radiographic, and histological features of a peri-implant lesion around an implant placed immediately after extraction of a tooth with a periapical lesion. A 52-year-old man received an immediate implant (3.75 x 11.5 mm2) placed in the anterior region of the maxilla. Three years after implant placement, the patient presented with swelling in the anterior portion of the maxilla. Radiographic examination showed a well-circumscribed radiolucency around the implant. The implant and the lesion were removed and fixed in 10% buffered formalin and processed. Histological analysis showed 3 types of epithelium: respiratory, cuboidal, and non-keratinized stratified squamous. In the cyst wall peripheral nerves, arteries, veins, and chronic inflammation were present. The diagnosis was nasopalatine duct cyst. We concluded that the nasopalatine duct cyst can develop in association with dental implants. Clinically, the lesion is similar to the classical nasopalatine duct cyst. Histological analysis should be mandatory in all cases of peri-implant lesions and in all dental periapical lesions before immediate implant placement.     

Intraosseous carcinoma of the anterior maxilla identified as the occult primary tumour of carcinoma of unknown primary

Carcinoma of unknown primary (CUP) is defined as lymph node metastasis without a detectable origin until after the initial treatment has been performed. The most common occult primary site in the head and neck, as revealed by a review of the published literature, is the oropharynx. An occult primary site in the oral region is extremely rare. We report a rare case of head and neck CUP (HNCUP) in a 69-year-old female patient, wherein the occult primary lesion was a primary intraosseous carcinoma (PIOC) invading the anterior maxilla. During the course of the initial diagnostic workup, no primary lesion could be identified; however, cervical lymph node metastasis to left levels IB and IIA were observed in the patient. A neck dissection followed by adjuvant radiotherapy was performed. However, the PIOC of the anterior maxilla was identified 6 months after neck treatment and was confirmed as the occult primary tumour of the HNCUP. This case is quite rare and required a comprehensive workup to guide optimal treatment. Careful follow-up or active biopsy should be considered if osteolytic changes are observed in the jaw.     

Corticotomy and compression osteogenesis in the posterior maxilla for treating severe anterior open bite

A new technique is described for outpatient treatment of anterior open bite. The compression osteogenesis method with a two-stage corticotomy was used in the posterior maxilla to treat a woman with severe anterior open bite. Three-week post-surgical compression using anchor plates and elastics repositioned the posterior maxillary bone/teeth segments by 7 mm to the ideal superior position. The patient had a stable skeletal position of the maxilla at 14-month follow-up with satisfactory results and no complications after orthodontic treatment. This technique appears to be an efficient option for treating patients with anterior open bite.     

Desmoplastic ameloblastoma featuring basal cell ameloblastoma: a case report

The desmoplastic ameloblastoma is a histological variant of ameloblastoma. The neoplastic epithelial islands seen in desmoplastic ameloblastoma are small and ameloblastic cells are rare. Basal cell ameloblastoma is also a rare variant of ameloblastoma, in which the tumor is composed of more primitive cells and has even fewer features of peripheral palisading. This report describes the case of a 17-year-old female with an ameloblastoma in the right anterior maxilla. Orthopantomography and computed tomography showed a well-defined lesion in the right maxilla. A partial maxillectomy for tumor resection was performed under general anesthesia. Histologically, ameloblastic tumor cells were seen with dense collagenous stroma and the tumor cells showed primarily basal cell variants of ameloblastoma. After 7 years of follow-up, clinical and radiographic examinations have revealed no evidences of recurrence.     

Mixed density lesion of the anterior maxilla

A case of COC which developed as a mixed lucent-opaque lesion in the anterior maxilla of a young person is discussed from the standpoint of clinical and radiographic differential diagnosis. Current concepts of the pathology of the COC and EOGCT are discussed.     

Melanotic neuroectodermal tumour of infancy in the maxilla: a case report

A 4.5-month-old Chinese boy presented with a bulging mass in the anterior right maxillary region. Clinical features and incisional biopsy examination confirmed the diagnosis of melanotic neuroectodermal tumour of infancy (MNTI). The lesion had first been noted a month before the biopsy. The extent of the lesion was defined via computed tomography, and surgical excision was accomplished through a partial maxillectomy under general anaesthesia. The patient has been irregularly followed-up over the past 8 years, and no evidence of recurrence has been found, either by clinical examination or serial computed tomography scans. A bony defect and a lack of alveolar process were noted on the right side of the anterior maxilla. The patient displayed social withdrawal at school as a result of his partial anodontia. There have only been a limited number of reports on the dental rehabilitation of postoperative MNTI. We report a case of maxillary MNTI in which the need for dental rehabilitation was emphasized.     

外伤性颌面部骨化性肌炎1例报告

骨化性肌炎是指骨骼肌间质内的结缔组织、肌、腱、韧带腱膜及骨骼肌的胶原性支持组织的异常骨化现象。其中,外伤性局限性骨化性肌炎常见于肘部、髋部、股部和臀部,发生于颌面部的骨化性肌炎较为罕见。本文报告1例典型病例,并对其发病机制、临床特点、诊断和治疗进行讨论。     

罕见右侧颞下颌关节骨性强直伴同侧颌面部广泛异位骨化1例及文献复习

目的:回顾分析颞下颌关节骨性强直伴颌面部异位骨化的发病原因、临床表现及诊治方法。方法:回顾性分析2017-04就诊于遵义医科大学附属口腔医院的1例右侧颞下颌关节骨性强直伴颌面部广泛异位骨化的病例资料,并结合文献复习分析其发病原因,总结其特征临床表现、诊断及治疗原则。结果:根据临床表现及影像学检查结果,该患者被确诊为右颞下颌关节骨性强直伴颌面部异位骨化,无明确外伤史。采用“右关节成形术+牵张成骨+异位骨化部分切除术”治疗,术后张口度恢复正常,面型稍有改善。出院时主动张口约2.0 cm,被动张口可达3.0 cm。嘱患者使用开口器积极张口训练并同期进行下颌骨牵张成骨,但患者配合度较差。患者于术后4个月再次出现进行性张口受限,颌面部异位骨化增多;于术后5个月取出牵张器,同时行关节强直松解术,术中可被动张口2.5 cm;但术后再次出现进行性张口受限,颌面部异位骨化继续增多,患者放弃治疗。结论:颞下颌关节骨性强直伴颌面部广泛异位骨化在临床上较为罕见,可能的病因有外伤、遗传等。依据影像学检查可明确诊断,治疗以手术为主。如何在行关节成形的同时治疗颌面部的广泛异位骨化是临床上的难题。     

Long-term clinical and radiological outcomes of surgical management of central giant cell granuloma of the maxilla

The aim of this study was to report the results of long-term clinical and radiological follow up of the surgical management of central giant cell granuloma of the maxilla. A retrospective analysis was conducted on 12 patients--5 male and 7 female whose ages ranged from 9 to 41 years, with central giant cell granuloma of the maxilla treated between 1991 and 2000. The anterior maxilla was involved in five cases, seven cases were in the posterior region, and none crossed the midline. Four patients were asymptomatic and eight patients presented with pain, mobility of teeth, and rapidly enlarging facial swelling. Radiographically, all lesions were radiolucent; 58.3% were unilocular, and the borders were well-defined in 33.3%. Roots were commonly displaced by the lesion, but no root resorption was observed. Cortical perforation was seen clinically and on CT scan in four patients. All cases were treated with thorough curettage until healthy bone was encountered. In cases with cortical perforation the affected buccal and/or palatal mucosa was excised. When the maxillary sinus was affected or the lesion was bulging into the nose, the nasal mucosa was also removed. All patients were reviewed annually for a follow-up period of 2-9 years; the condition recurred in two patients. It is concluded that thorough curettage is a satisfactory method for the treatment of non-aggressive and aggressive central giant cell granuloma of the maxilla, with a low recurrence rate and favorable postoperative outcome.