[Radiolucency at both lower third molars: the paradental cyst]. / Radiolucentie bij beide derde ondermolaren: een paradentaire cyste.

A 23-year-old man presented with an irritating sensation at the third molar on the left side of the mandible and a bad taste in his mouth. Radiographic and histopathological examination revealed the abnormality was caused by a paradental cyst. The paradental cyst is located distal to a lower third molar and, together with the mandibular buccal bifurcation cyst, belongs to the inflammatory collateral cysts. Treatment consists of enucleation of the cyst and removal of the lower third molar. Recurrences do not occur.

Suspected Lateral Periodontal Cyst Presenting Concurrently with Canine Acanthomatous Ameloblastoma in a 2-Year-Old Standard Poodle.

Lateral periodontal cysts (LPCs) are odontogenic epithelial cysts composed of nonkeratinized epithelial cells that are in the category of developmental cysts, rather than inflammatory cysts. Lateral periodontal cysts are rare both in people and domestic animals; they are associated with vital teeth and located lateral to a tooth root. Lateral periodontal cysts are typically asymptomatic lesions that are characterized radiographically as a unilocular lucency with well-defined corticated borders. Canine acanthomatous ameloblastoma (CAA) is the most common odontogenic neoplasm in dogs and rarely presents as a cystic lesion. This case report describes the diagnosis and treatment of a cyst that occurred as a swelling apical to a gingival mass that was diagnosed histologically as CAA. Surgical management by conservative gingivectomy, cyst enucleation, and bone grafting was an effective treatment in this patient.

Inflammatory collateral cyst associated with a palatoradicular groove: report of a case and discussion of nomenclature.

The aims of this article are to present a case demonstrating the connection between palatoradicular grooves and inflammatory collateral cysts and to discuss the related nomenclature. Radiographs in a 21-year-old man revealed a radiolucent, unilocular, well-defined area near the vital maxillary right lateral incisor and canine. Palatal swelling was present, and a 6-mm-deep periodontal pocket was found at the palatal surface of the right lateral incisor. The differential diagnoses were keratocystic odontogenic tumor, developmental lateral periodontal cyst, and inflammatory lateral periodontal cyst. The area was explored surgically, and the lesion was excised. Surgical exploration revealed a palatoradicular groove, which was scaled and planed with the aid of manual curettes with the intention of creating a flat surface to promote insertion of the periodontal fibers. Histopathologic analysis revealed that the lesion was an inflammatory cyst. The presence of a palatoradicular groove can put the periodontium at risk because a resulting lack of fiber insertion makes oral hygiene difficult. This established inflammatory process can initiate development of an inflammatory collateral cyst that may be misdiagnosed, hindering successful management. In this case, bone grafting and placement of a resorbable membrane were used to promote bone formation and subsequent sealing of the periodontal space.

Gingival Cysts of Adults: Retrospective Analysis from Two Centers in South Brazil and a Review of the Literature.

Gingival cysts of adults are rare developmental cysts, with an incidence of 0.3% among all odontogenic cysts. They are benign, well-defined nodules located on the attached gingiva with a fluid-filled appearance. The aim of the present study was to perform an analysis of gingival cysts in adults diagnosed at an oral pathology laboratory and a hospital pathology service in order to determine the frequency of occurrence of this lesion, and to perform a literature review to correlate the present findings with those described in the literature. This study emphasizes the low frequency of gingival cysts in adults and the importance of gathering clinical, radiographic and histopathological information to define the final diagnosis.

Odontogenic Cysts - An Overview.

This article aims to discuss the clinical features, radiological assessment, histopathology and management of a variety of odontogenic cysts. It also highlights the reclassification of odontogenic keratocysts to keratocystic odontogenic tumours.

[Juvenile paradental cysts in children after mandible distraction: case-control study and clinical cases presentation].

Seventy-five children aged 6-17 years (mean age 9.8±4.1 years) that received mandible distraction (MD) at the age of 0-17 years (mean age at MD 6.1±4.3) were included in the study. Indication for MD were hemifacial microsomia (n=41), Goldenhar syndrome (n=4), Robin sequence (n=10), Treacher, Collins syndrome (n=7) or acquired mandible underdevelopment (n=13). Control groups consisted of 22 children aged 5-14 years (mean age 7.0±3.7 years) with mandible underdevelopment of similar origin (hemifacial microsomia (n=15), Goldenhar syndrome (n=2), Robin sequence (n=4), Treacher, Collins syndrome (n=1)) with no history of MD and 80 healthy children aged 6-10 years (mean age 7.1±2.2 years). Case-control study results proved MD to be the risk factor for juvenile paradental cysts (JPCs) with the risk more prominent in early MD cases. JPCs often do not manifest clinically and may resolve spontaneously but in refractory cases lesion curettage without endodontic treatment is an adequate approach, as JPCs are usually not associated with pulp necrosis.

Large buccal bifurcation cyst in a child: a case report and literature review.

BACKGROUND: WHO defines the mandibular buccal bifurcation cyst as a cyst occurring near the cervical margin of the lateral aspect of a root as a consequence of inflammatory process in a periodontal pocket. The pathogenesis of these cysts is still debated, but they are most likely originated from reduced enamel epithelium or from inflammatory proliferation of epithelial cell rests of Malassez that come from the superficial mucosa of a tooth in eruption. The aim of this article was to describe a case of large buccal bifurcation cyst of a permanent mandibular first molar. CASE REPORT: A 6-year-old boy was referred to Department of Oral Riabilitation of the Istituto Stomatologico Italiano, University of Milan, Italy, with the complaint of hard swelling over the buccal gingiva and a deep probing depth located on the buccal aspect. Radiograph revealed a well-defined semilunar-shaped radiolucency, marked by a fine radiopaque line on the buccal aspect of the partially-erupted lower right first molar and it was large enough to include a small part of the crown of the second right molar. As reported in the literature the treatment of choice is enucleation and curettage of the lesion without extraction of the vital involved tooth. This procedure has shown excellent results in both the short- and long-term. The definitive diagnosis of paradental cysts can be assessed by histopathologic analysis.

An unusual case of ameloblastoma observed in the left anterior mandible.

AIM: To report a small intaalveolar ameloblastoma which resembled cystic lesion, and to emphasize the value of Computed tomography (CT) in radiographic examination. BACKGROUND: Ameloblastoma is a slow-growing, locally invasive odontogenic neoplasm that accounts for approximately 10% of all tumors detected in the jaws. Radiographically, those tumors are usually well-defined. Computerized tomography is highly recommended to confirm the diagnosis. CASE DESCRIPTION: A 48-year-old female attended with a chief complaint of painless swelling in the left anterior of mandible, 1 month duration. In intraoral examination, non-fluctuant, immobile, approximately 1 × 1 cm in dimension, painless, swelling which had a bone-like hardness and located in the mandibular canine region was detected. Panoramic radiography revealed a well circumscribed unilocular radiolucent lesion located in the inter-radicular area of left mandibular lateral and canine teeth. In CT examination it was realized that the lesion was multilocular. Histopathological examination of the biopsy specimen was reported as ameloblastoma. CLINICAL SIGNIFICANCE: It is extremely difficult to find such an ameloblastoma in small dimension in alvolar bone.

Odontogenic keratocystic can be misdiagnosed for a lateral periodontal cyst when the clinical and radiographical findings are similar.

Lateral periodontal cyst (LPC) and odontogenic keratocystic (OK) are two osteolytic lesions of the jaw with different local invasiveness and percentage of recurrence. The aim of this study was to highlight the attention on the differential diagnosis of these lesions that sometimes can have unexpected location and can lead doubts on diagnosis, therapy, and follow-up. A 34-year-old man presented to our department with a complaint of soft pain in the vestibular aspect of left mandibular second premolar and left mandibular first molar. Vital teeth in the left mandible, no mucosal swelling, and no drainage were observed. The CBCT showed a well circumscribed hypodensity area, extending between 3.5 and the apex of mesial root of 3.6. No displacement and no resorption of the roots were notified. Upon clinical and radiographical examination, a provisional diagnosis of LPC was made and enucleation of the lesion and histological examination were planned. Histologically, a cystic wall partially lined by a keratinizing squamous epithelium was observed. Surrounding and within the lesion, there was a chronic inflammatory infiltrate also of granulomatous type and with cholesterol clefts. Based on these findings, the diagnosis of odontogenic keratocystic was done. Radiolucent lesions in the premolar and canine region are frequently clinically and radiographically misdiagnosed. The identification of keratocyst in a location preoperatively favoring a lateral periodontal cyst should be suspected and biopsy must be considered in all cases to establish the nature of the lesion, the best surgical treatment, and the follow-up appointments.

Buccal bifurcation cyst: A case series and review of the literature.

INTRODUCTION: Buccal bifurcation cyst is an inflammatory odontogenic cyst and constitutes up to 5% of all odontogenic cysts. The aim of this study was to report a series of cases, review the recent literature, and facilitate recognition and proper treatment of this entity. METHODS: With institutional review board approval, the authors retrieved all archival cases of buccal bifurcation cyst from the oral pathology biopsy service from 1994 through 2018. Patient age and sex, cyst location, clinician's impression, radiographic appearance, diagnosis, and treatment data were recorded. RESULTS: A total of 10 cases were identified. Average patient age was 9 years. A slight male predilection was observed (n = 6, 60%). One hundred percent of cases were in the mandible, including 3 (30%) bilateral cases. CONCLUSIONS: Mandibular buccal bifurcation cyst is an important entity in pediatric patients but may be less likely to be recognized by clinicians not regularly treating children. The results of this study are mostly consistent with the literature. Treatment is typically via enucleation or even more conservative modalities, and extraction should be avoided if possible. PRACTICAL IMPLICATIONS: Buccal bifurcation cysts should be treated via enucleation or even more conservative methods. If possible, the affected teeth should be preserved.

An unusual white lesion in a 10-month-old child.

UNLABELLED: Oral lesions commonly diagnosed in newborns and infants include Epstein's pearls, Bohn's nodules, dental lamina cysts and congenital epulis. Nevertheless, intriguing cases which have rarely been reported in the literature are encountered by clinicians. This paper reports a case of an unusual white lesion in a 10-month-old child which resolved spontaneously. However, histological examination proved it to be a foreign body. CLINICAL RELEVANCE: Infants tend to explore things with their mouths; hence they put anything they can hold into it to determine the size and texture. This case serves to illustrate that the unexpected can occur and that, in children, the differential diagnosis should include a foreign body.

A diagnostic dilemma: endodontic lesion or odontogenic keratocyst? A case presentation.

AIM: To present a clinical case of odontogenic keratocyst (OKC) simulating a lateral periodontal cyst. SUMMARY: A 39-year-old female complaining of swelling and pain in the left mandibular premolar area was found to have a radiolucent lesion between teeth 34 and 35 (FDI). Both teeth had incomplete root fillings, and orthograde re-treatment of both premolars was performed. At 2-year follow-up, radiographic examination showed an increase in the radiolucent defect with respect to the previous examination. A surgical treatment of tooth 34 was then performed, with histological examination of the lesion. Histological features were consistent with an OKC, and the lesion was successfully treated by complete enucleation and application of Carnoy's solution. At 2-year follow-up, no clinical signs or symptoms were found and the radiolucent area had disappeared. KEY LEARNING POINTS: Odontogenic keratocysts may mimic endodontic lesions. Clinicians should carefully review their cases and consider surgical intervention with biopsy in cases that do not heal.

Orthodontic therapy in patients with pericoronal hamartoma.

Pericoronal lesions are undesirable for dental eruption, and they are always associated with unerupted teeth. Pericoronal lesions are common and are usually treated by extraction of the permanent tooth. Pericoronal hamartoma is a special type of pericoronal lesion, and little information about it is available in the orthodontic literature. This report presents a patient with pericoronal hamartoma on the mandibular left permanent first molar who had orthodontic treatment. Because of the similarity of the radiographic radiolucency of pericoronal hamartoma and other lesions, a differential diagnosis must be made to avoid extraction of permanent teeth.

Lateral periodontal cysts: a retrospective study of 11 cases.

OBJECTIVE: To describe the clinical, radiological and histopathological features of lateral periodontal cysts among patients diagnosed in different centers (Vall d'Hebron General Hospital, Granollers General Hospital, the Teknon Medical Center, and the Master of Oral Surgery and Implantology of the University of Barcelona Dental School; Barcelona, Spain). STUDY DESIGN: A retrospective observational study was made of 11 lateral periodontal cysts, all of which were diagnosed following a thorough clinical examination, radiological study and posterior histological study. RESULTS: The mean patient age was 37 years, and males predominated over females. The mean lesion size was 1.25 cm. A single relapse was recorded 7 years after removal of the initial lesion. All the cysts were surgically removed. DISCUSSION AND CONCLUSIONS: Lateral periodontal cysts are very infrequent, and are characterized by the preserved vitality of the adjacent teeth. Identification of the lesion is initially based on the clinical findings, though histological study is required to confirm the diagnosis. The treatment of choice is the surgical removal, though occasional relapses have been documented.

Cysts and Pseudocysts of the Oral Cavity: Revision of the Literature and a New Proposed Classification.

This article includes a comprehensive and up-to-date review on the cysts of the oral cavity. Several classifications of odontogenic (OC) and non-odontogenic (non-OC) oral cysts and the surrounding regions have been proposed. We suggest a new critical classification based on an established relationship between anatomical area, histological origin and clinical behavior (frequency, rate of recurrence, malignant potential). Moreover, the differential cytokeratin (CKs) expression of the various cysts is reported as epithelium-specific markers of differential diagnosis. Finally, issues related to differential diagnosis and therapeutic approaches of the cysts included in the two groups are described.

Odontogenic Cysts and Neoplasms.

This article reviews a myriad of common and uncommon odontogenic cysts and tumors. The clinical presentation, gross and microscopic features, differential diagnosis, prognosis, and diagnostic pitfalls are addressed for inflammatory cysts (periapical cyst, mandibular infected buccal cyst/paradental cyst), developmental cysts (dentigerous, lateral periodontal, glandular odontogenic, orthokeratinized odontogenic cyst), benign tumors (keratocystic odontogenic tumor, ameloblastoma, adenomatoid odontogenic tumor, calcifying epithelial odontogenic tumor, ameloblastic fibroma and fibroodontoma, odontoma, squamous odontogenic tumor, calcifying cystic odontogenic tumor, primordial odontogenic tumor, central odontogenic fibroma, and odontogenic myxomas), and malignant tumors (clear cell odontogenic carcinoma, ameloblastic carcinoma, ameloblastic fibrosarcoma).