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Ajit Singh Rathore, Saurabh Juneja, Neha Khurana, Devi Charan Shetty
Ameloblastoma is true odontogenic tumor of epithelial origin, which is described as locally aggressive with varying chances of recurrence. It is believed to derive from enamel organ, remnants of dental lamina, lining of odontogenic cysts, or basal cells of oral epithelium. Radiologically, it may present as unilocular or multilocular radiolucency commonly. Although conventional ameloblastoma presents typical histological features as described by Vickers and Gorlin, few unusual variants have been reported with different histological patterns...
April 2017: International Journal of Applied and Basic Medical Research
S Anajar, A Lakhbal, R Abada, M Mahtar
INTRODUCTION: Keratoameloblastoma is an extremely rare odontogenic tumor, as only 18 cases have been reported in the literature. CASE REPORT: The authors report a case of keratoameloblastoma in a 32-year-old woman and review the literature concerning the clinical features, radiological appearance, histopathological findings and treatment options. DISCUSSION: Keratoameloblastoma is a rare tumor observed more frequently in males (sex ratio: 3:1) characterized by extensive keratin production in odontogenic islets and fibrous stroma...
May 2017: European Annals of Otorhinolaryngology, Head and Neck Diseases
Ravinder S Bedi, Kunal Sah, Anil Singh, Sunira Chandra, Vineet Raj
Keratoameloblastoma (KA) is a rare histological variant of the ameloblastoma with extensive keratin production within the odontogenic islands as well as in the fibrous stroma. Pindborg first reported it in 1970, since then only 18 cases have been reported in the literature. We report a soft tissue recurrence of KA, involving right posterior region of the lower jaw in a 27-year-old female.
December 2015: Quantitative Imaging in Medicine and Surgery
Chena Lee, Byoung-Jun Park, Won-Jin Yi, Min-Suk Heo, Sam-Sun Lee, Kyung-Hoe Huh
Keratoameloblastoma is a rare subtype of ameloblastoma. It tends to have a poor prognosis, and therefore a careful diagnosis based on imaging is important in planning appropriate surgical treatment for this distinctive type of ameloblastoma. A unique feature of keratoameloblastoma is atypical calcification inside the mass, such as a ground-glass appearance, internal calcification, or a mixed radiolucent and radiopaque pattern. Because of its poor prognosis and the likelihood of frequent recurrences, surgical resection is considered the treatment of choice...
November 2015: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Sangeeta J Palaskar, Rasika B Pawar, Deepakkumar D Nagpal, Swati S Patil, Pargatsingh T Kathuriya
Ameloblastoma is the second most common odontogenic tumour of oral cavity; which has several different histological variants such as follicular, plexiform, acanthomatous, granular cell, desmoplastic, basal cell, clear cell, hemangiomatous, mucous cell differentiation and keratoameloblastoma. It is common in posterior mandible and has high male predilection in the ratio of 3:1. This report presents a case of keratoameloblastoma in 65-year-old female patient in the anterior mandible region with literature review on clinical features, histopathological findings, radiological appearance and treatment options...
March 2015: Journal of Clinical and Diagnostic Research: JCDR
Vineet Raj, Shaleen Chandra, Ravinder Singh Bedi, Ruby Dwivedi
Ameloblastoma has intrigued clinicians as well as pathologists due to its diverse clinical behavior and histomorphologic presentations. Keratoameloblastoma is a rare histologic sub type, characterized by extensive keratin formation within ameloblastic epithelium, with only a handful number of cases described in the literature. Here, we report a case of this uncommon sub type of ameloblastoma in a young female patient presenting as an extensive lesion in mandibular ramus area. The radiological and fine needle aspiration findings suggested of a keratinizing cystic lesion and incisional biopsy showed features of ameloblastoma...
September 2014: Dental Research Journal
Mohammad Ali Ketabi, Nima Dehghani, Hasan Mirmohammad Sadeghi, Mohammad Ghasem Shams, Hasan Mohajerani, Mohadese Azarsina, Arshia Azizi
The keratoameloblastoma is a rare histologic variant of ameloblastoma. Fewer than 15 cases of keratoameloblastoma have been documented in the literature. We report a new case of keratoameloblastoma in a 21-year-old female patient with a unilocular radiolucent lesion between the roots of the right mandibular incisors. We describe the clinical, radiographic, and histopathologic features of this lesion along with a review on the characteristics of previous cases. We also discuss about classification and management of this lesion...
November 2013: Journal of Craniofacial Surgery
Neeta Mohanty, Varun Rastogi, Satya Ranjan Misra, Susant Mohanty
Odontogenic tumors develop in the jaw bones from the odontogenic tissue-oral epithelium in tooth germ, enamel organ, dental papilla, reduced enamel epithelium, remnants of Hertwig's root sheath or dental lamina, and so forth. Hence, a bewildering variety of tumors are encountered in the maxilla and mandible. Ameloblastoma is the second most common odontogenic neoplasm after odontomes, and it has numerous clinical and histologic variants. We report a very rare histologic variant: the papilliferous keratoameloblastoma which is the fifth reported case in the English literature...
2013: Case Reports in Dentistry
John M Sisto, Gregory G Olsen
Keratoameloblastoma is a rare subtype of ameloblastoma that has been reported only 12 times previously in the literature. Ameloblastomas are benign, locally aggressive neoplasms that constitute approximately 1% of odontogenic neoplasms. The mandible is involved in 80% of cases and the maxilla 20%. Clinically, these appear as solid, unicystic, multicystic, and mixed solid and multicystic tumors. Histologically, these are classified as follicular, plexiform, acanthomatous, and granular cell. Less common histologic variants are clear cell, desmoplastic, basal cell, papilliferous, and keratoameloblastoma...
April 2012: Journal of Oral and Maxillofacial Surgery
Bf Adeyemi, Ao Adisa, Ao Fasola, Ee Akang
Keratoameloblastoma is a very rare ameloblastoma variant defined by extensive squamous metaplasia and keratinization. There are 13 previously reported cases in the literature, with a male predilection of 3:1. A 38-year-old male presented with a painless mandibular swelling which had been progressively increasing in size for 18 months. The incisional biopsy was misdiagnosed as basaloid squamous carcinoma. Owing to financial constraints, the patient had mandibular resection a decade after first noticing the growth, during which the clinical course was essentially benign, thus casting doubt on the initial diagnosis...
July 2010: Journal of Oral and Maxillofacial Pathology: JOMFP
Ye Zhao, Ya-Ge Zheng, Lan-Yan Wu
No abstract text is available yet for this article.
May 2008: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
Joseph C Whitt, Charles L Dunlap, John L Sheets, Michael L Thompson
The term keratoameloblastoma has been used to describe a histologically heterogeneous group of ameloblastoma variants which have in common the formation of keratin by the ameloblastomatous epithelium. The English language literature contains reports of only 12 cases of keratoameloblastoma, of which 4 cases exhibited a papilliferous component. We report a unique tumor that we believe falls within the broad histopathologic spectrum of keratoameloblastoma. We review the key clinical and histopathologic features of the previously reported cases of keratoameloblastoma and present an additional case that presented as an expansile, radiolucent lesion with internal opacification between the roots of teeth in the left anterior maxillary alveolar ridge of a 45-year-old white male...
September 2007: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
Marilena Vered, Amos Buchner, Dan Dayan, Moshe Shteif, Adi Laurian
A case of an unusual lesion from the maxilla is presented. Macroscopically, the lesion was solid and histologically consisted of 'multiple separate keratocysts' of varying size that infiltrated into the surrounding bone and soft tissues. Panoramic image and CT scans showed a multilocular honeycomb ill-defined radiolucency with infiltration into the maxillary sinus and floor of orbit. This lesion should be differentiated from similar odontogenic lesions, such as keratoameloblastoma and papilliferous keratoameloblastoma...
February 2004: Journal of Oral Pathology & Medicine
Paola Collini, Nicola Zucchini, Graziella Vessecchia, Marco Guzzo
We report a fourth case of papilliferous keratoameloblastoma, with a 6-year follow-up. A 62-year-old man underwent resection of a right mandibular neoplasm infiltrating bone and soft tissues. Microscopically, there were cysts lined by papillary projections and containing necrotic debris. Cribriform, solid, and tubular patterns were also present. No regional or distant metastases were found. A local recurrence, developed 3 years later, showed a predominance of the lesser differentiated patterns and focal granular cell ameloblastomatous features...
April 2002: International Journal of Surgical Pathology
Y Takeda, M Satoh, S Nakamura, T Ohya
Keratoameloblastoma is an extremely rare variant of ameloblastoma, and a review of the English language literature yields only several documented cases of ketatoameloblastoma. This paper reports a keratoameloblastoma showing unique histological architecture. The patient was a 76-year-old Japanese man with a multilocular radiolucent lesion of the mandible extending from the left canine to the second molar area. Microscopically, the lesion was characterized by multicystic spaces lined by papillary projections of proliferating odontogenic epithelium with extensive surface parakeratinization in a lamellar accumulation of keratin...
October 2001: Virchows Archiv: An International Journal of Pathology
N A Said-al-Naief, H Lumerman, M Ramer, W Kopp, G J Kringstein, F Persenchino, R Torno
The keratoameloblastoma is a rare histologic variant of the ameloblastoma. Review of the English language literature revealed five case reports of keratoameloblastoma. We report the sixth case of this tumor. The tumor developed in the right posterior maxilla of a 26-year-old African-American man and demonstrated aggressive clinical behavior, analogous to conventional ameloblastoma. The initial biopsy specimen showed extensive cyst formation, which histologically resembled odontogenic keratocyst. However, the lining epithelium varied in thickness and there was separation and edema between the basal cells and the rest of the epithelium...
November 1997: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics
E J Raubenheimer, W F van Heerden, C E Noffke
One hundred and eight ameloblastomas diagnosed in a rural black Africa population were analysed for clinicopathologic findings other than those classically described. One patient had a polycystic ameloblastoma adjacent to an ameloblastic fibroma. Two other polycystic ameloblastomas showed aneurysmal bone cyst formation and one mandibular tumour was diagnosed as a keratoameloblastoma. Microscopic changes resembling an adenomatoid odontogenic tumour were present in association with two unicystic ameloblastomas and a HPV18-positive verrucous lesion occurred in the lining of a cystic space of a polycystic ameloblastoma...
May 1995: Journal of Oral Pathology & Medicine
E J Norval, I O Thompson, C W van Wyk
An unusual case of ameloblastoma which depicts cystic follicles containing orthokeratin, parakeratin, desquamated epithelium and necrotic material with dystrophic calcification is presented. The presence of ameloblast-like cells confirms the diagnosis of an ameloblastoma. However, certain features resembled those of the keratoameloblastoma and others, less convincively, the papilliferous keratoameloblastoma. The extensive keratinisation in this tumour and in the aforementioned neoplasms raises the question whether they represent variants of the acanthomatous ameloblastoma...
November 1994: Journal of Oral Pathology & Medicine
M Altini, H D Slabbert, T Johnston
A case of papilliferous keratoameloblastoma is reported which is only the second ever documented. The patient was a 76-yr-old black woman with a large expansile multilocular radiolucency of the body, angle and ramus of the mandible. Histologically the lesion consisted of sheets of cystic follicles filled with necrotic debris and sometimes parakeratin. The vast majority of the follicles were lined by a papilliferous epithelium consisting of large rounded cells with centrally placed nuclei. True papillary projections with cores of connective tissue were also present...
January 1991: Journal of Oral Pathology & Medicine
M Altini, R Lurie, M Shear
In the "WHO histological typing of odontogenic tumors, jaw cysts and allied lesions", the authors recognize five distinct histologic types of ameloblastoma. A further histologic variant, the keratoameloblastoma, was first described by PINDBORG. A second case of a keratoameloblastoma is reported. This lesion occurred in the maxilla of a 28-year-old Caucasian male.
October 1976: International Journal of Oral Surgery
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