Occurrence Of Ameloblastoma Research Articles

Epidemiological profile of ameloblastoma at Erasto Gaertner Hospital

Ameloblastoma is the most common benign tumor of odontogenic origin, and represents about 11% of all odontogenic tumors. It is characterized by being locally aggressive and having high recurrence rates. Objective: To evaluate the occurrence of ameloblastoma in the Erasto Gaertner Hospital in patients from 1972 to 2012. In addition, to assess the main treatments, the most prevalent histological variants, the recurrence rate, the anatomical location of the lesion and patient profile. Material and methods: A retrospective study of patients diagnosed with ameloblastoma at the Erasto Gaertner Hospital between the years 1972-2012 was performed. Epidemiological data were collected such as gender, age, race, lesion location, type of surgical procedure, follow-up and recurrence rate; and analyzed using descriptive statistics. Results: A total of 40 patients were selected for the study. The most affected age group was between the third and fifth decade of life, with 19 cases (47.5%), followed by the second and fourth decade, with 14 cases (35%); the sixth decade, with 5 cases (12.5%) and seventh decade with 1 case (2.5%). The patients’ ages ranged from 13 to 66 years, with an average age 34.9 years. The mandible was the most affected site, with 38 cases (95%) of cases, and maxilla had only 2 cases (5%). Thirty-eight patients were treated with radical surgery and 5 patients presented recurrence after 1 year of follow-up. Both cases that occurred in maxilla presented recurrence. Conclusion: Recurrence of ameloblastoma decreases significantly when surgery is performed properly, with wide excision and margin. Combination of full tumor resection and reconstruction was the best approach observed in this study. In addition, we recommend a long period of clinical and radiographic follow-up.

Epidemiological profile of ameloblastoma at Erasto Gaertner Hospital

Ameloblastoma is the most common benign tumor of odontogenic origin, and represents about 11% of all odontogenic tumors. It is characterized by being locally aggressive and having high recurrence rates. Objective: To evaluate the occurrence of ameloblastoma in the Erasto Gaertner Hospital in patients from 1972 to 2012. In addition, to assess the main treatments, the most prevalent histological variants, the recurrence rate, the anatomical location of the lesion and patient profile. Material and methods: A retrospective study of patients diagnosed with ameloblastoma at the Erasto Gaertner Hospital between the years 1972-2012 was performed. Epidemiological data were collected such as gender, age, race, lesion location, type of surgical procedure, follow-up and recurrence rate; and analyzed using descriptive statistics. Results:A total of 40 patients were selected for the study. The most affected age group was between the third and fifth decade of life, with 19 cases (47.5%), followed by the second and fourth decade, with 14 cases (35%); the sixth decade, with 5 cases (12.5%) and seventh decade with 1 case (2.5%). The patients’ ages ranged from 13 to 66 years, with an average age 34.9 years. The mandible was the most affected site, with 38 cases (95%) of cases, and maxilla had only 2 cases (5%). Thirty-eight patients were treated with radical surgery and 5 patients presented recurrence after 1 year of follow-up. Both cases that occurred in maxilla presented recurrence. Conclusion: Recurrence of ameloblastoma decreases significantly when surgery is performed properly, with wide excision and margin. Combination of full tumor resection and reconstruction was the best approach observed in this study. In addition, we recommend a long period of clinical and radiographic follow-up.

A dinosaurian facial deformity and the first occurrence of ameloblastoma in the fossil record.

Despite documentation of various types of neoplastic pathologies encountered in the vertebrate fossil record, no ameloblastic tumours have been recognised so far. Ameloblastoma is a benign neoplasic tumour with a strong preponderance for the mandible. Here, we report for the first time the presence of an ameloblastoma neoplasm in the lower jaw of a specimen referred to the derived non-hadrosaurid hadrosauroid dinosaur Telmatosaurus transsylvanicus from the uppermost Cretaceous of the Haeg Basin in Romania. The location, external appearance and internal structure of the pathological outgrowth provide clear evidence for the diagnosis of ameloblastoma in Telmatosaurus. This report extends the range of pathologies encountered in hadrosauroid dinosaurs. In addition, recognition of an ameloblastoma neoplasm in a taxon lying close to the origin of ‘duck-billed’ hadrosaurid dinosaurs confirms the predisposition of this clade towards neoplasia pathologies already in its basal members.

Morphologic characterization of temporomandibular joint ankylosis

Objectives: The purpose of this study was to characterize the total burden of ameloblastoma with respect to the changing occurrence and clinical presentation in theEasternNigeria environment. Patients and methods: A retrospective study of 240 cases of Ameloblastoma seen at theOral andMaxillofacial Surgery units of five specialist hospitals in the eastern states of Nigeria was carried out over an 8-year period. The case notes of these patients were retrieved from the records department, analyzed and evaluated. All the cases were categorized by the tumour site, age, sex and time of presentation. Results: Two hundred and forty (240) cases of ameloblastoma were seen for the 8-year study period. There were 117 males (48.7%) and 123 females (51.3%) giving a male-to-female ratio of 1:1.1 with mean age of 43 years for males and 32 years for females. The highest age of presentations (42.5%) were between the ages of 20 and 39 years. The most common site of occurrence was the symphyseal region 140 (58.3%). Conclusion: Our study shows that the site of predilection for occurrence of ameloblastoma in Eastern Nigeria is the anterior region of the mandible and the females were more affected. Most of these patients presented late.

The pattern and occurrence of ameloblastoma in adolescents treated at a university teaching hospital, in Kenya: A 13-year study

Ameloblastoma presenting in the adolescent age group is rare with few studies documenting their occurrence. Aim The aim of this study was to carry out an analysis of the pattern and occurrence of ameloblastoma in those less than 20 years of age. Materials and method Patients from the University of Nairobi Dental teaching Hospital treated for ameloblastoma were included in the study over a 13-year period. The study highlights the demographic, clinic-radiographic and histologic features of benign locally aggressive lesions. Results A total of 127 patients were recorded of which, 27 (21.3%) were below the age of 20 years; no case was reported below the age of 10 years. 18.5% were below the age of 14 years and 81.5% were 15–19 years old. The gender predilection was ∼1:1. All of the tumours occurred in the mandible, with radiographic features of a multilocular radiolucencies (85.2%); and a fewer unilocular lesions (14.8%). The management is in a staged-wise approach: resection and/or disarticulation with temporary reconstruction using mandibular stainless steel or titanium plates and delayed bone grafting. Conclusion The occurrence of ameloblastoma can mimic an odontogenic cyst, clinicians therefore need to be vigilant when examining adolescents so that conservative treatment is started early in order to reduce the subsequent morbidity.

Occurrence of ameloblastoma in a patient with nasopharyngeal carcinoma after treatment by irradiation

Ameloblastoma is the most common clinically significant epithelial odontogenic tumor, and is considered a benign but locally aggressive tumor of the craniofacial region. We present the case history of a 46-year-old male patient who had a nasopharyngeal carcinoma (NPC) treated by irradiation, which was complicated by the occurrence of an ameloblastoma. Following a review of the English language literature, this case history was identified as being the first report, to our knowledge, of the occurrence of ameloblastoma in a patient who had been irradiated for an NPC. This case report highlights the importance of regular dental care for a patient who had an NPC and was treated with radiation therapy.

Synchronous ameloblastoma and orthokeratinized odontogenic cyst of the mandible

The simultaneous occurrence of ameloblastomas with odontogenic cysts or other non-odontogenic lesions have already been described as combined lesions. However, we are unaware of any report in the English literature of simultaneous occurrence of ameloblastoma and orthokeratinized odontogenic cyst (OOC) occurring as completely distinct lesions. This report shows a case of synchronous ameloblastoma and OOC, located on posterior regions of the mandible, but in distinct sides.

エナメル上皮しゅの臨床的・病理組織学的検索 歯そう部症例について

Since the occurrence of ameloblastoma in the alveolar region is rare, little is known about its properties. We experienced 6 such cases in 24 years.Patients' ages at first visit ranged from 9 to 53 years old. Five cases were found in the mandible and one in the maxilla. Five of 6 patients complained of an enlargement of the alveolus whose size ranged from the tip of the little finger to that of the thumb. In 4 cases, the teeth which had been related to the tumor had been extracted and in one child, the tumor-related tooth germ was not evident.Radiographic examinations revealed that 3 cases had unilocular appearance, 1 had large multilocular, and 2 had honeycomb appearance. Unilocular and multilocular cases had well defined peripheral margins with radiopaque figures, but the honeycomb cases had poorly definable margins. It was interesting to note that the former cases preferentially located in the molar edenturous region expanded to the mandibular body, while the latter in the anterior denturous portion.Histological examination revealed that the unilocular or multilocular tumors were surrounded by connective tissues and showed an expansive growth pattern, while the honeycomb tumors infiltrated the interspace of bone trabecules and destroyed these structures.The above findings suggested a possibility that the histological growth pattern of ameloblastoma was destined by the condition of bone trabecules in the alveolus.

Occurrence of ameloblastoma within a dentigerous cyst

Occurrence of ameloblastoma within a dentigerous cyst

Occurrence of ameloblastoma within a dentigerous cyst: Report of a case

A case report has been presented to emphasize the importance of follow-up examinations. A 14-year-old girl was operated on for removal of a dentigerous cyst of the mandible. The postoperative healing was rapid and satisfactory until a small radiolucent area appeared in the alveolus. This area was enucleated 21 months after the first operation, and the lesion was found to be an ameloblastoma. There was no further evidence of tumor over the following 9 years. In view of the excellent immediate postoperative course, this young patient could easily have been discharged as cured after a few months. A long-term follow-up seemed advisable, however, and after nearly 2 years a tumor was found in the original surgical site.