Publications by authors named "John Hellstein"

Hematolymphoid neoplasms originating in the periapical region of a tooth are rare occurrences. Their signs, symptoms, and radiographic findings can also mimic lesions of endodontic origin. History-taking and clinical examination provide clues to determine the possibility of a non-endodontic lesion, although the definitive diagnosis can only be rendered based on histologic examination.

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Article Synopsis
  • * A review of 72,055 pathology reports from 2003 to 2021 identified 10,031 intraosseous lesions, with 7.94% being non-endodontic; the majority (94.02%) of surgeries were conducted by endodontists.
  • * The study found that 1%-3% of teeth with pulp necrosis were diagnosed as non-endodontic lesions, emphasizing the importance of further examination to accurately identify the cause of periradicular pathologies.
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Mucous membrane pemphigoid is an autoimmune disease with variable clinical presentation and multiple autoantigens. To determine whether disease endotypes could be identified on the basis of the pattern of serum reactivity, the clinical and diagnostic information of 70 patients with mucous membrane pemphigoid was collected, and reactivity to dermal or epidermal antigens, using indirect immunofluorescence, and specific reactivity to bullous pemphigoid (BP) autoantigens BP180 and BP230, collagen VII, and laminin 332 were evaluated. Most patients had lesions at multiple mucosae, with the most prevalent being oropharyngeal (mouth, gingiva, pharynx; 98.

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Article Synopsis
  • * A case study is presented of a 12-year-old girl who had an initial diagnosis of alveolar RMS in her left maxillary sinus, but later developed a rare skin metastasis on her left temple.
  • * The report includes a summary of previous cases and emphasizes the importance of using an immunohistochemistry panel to accurately diagnose this type of tumor.
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Adenoid ameloblastoma is a very rare benign epithelial odontogenic tumor characterized microscopically by epithelium resembling conventional ameloblastoma, with additional duct-like structures, epithelial whorls, and cribriform architecture. Dentinoid deposits, clusters of clear cells, and ghost-cell keratinization may also be present. These tumors do not harbor BRAF or KRAS mutations and their molecular basis appears distinct from conventional ameloblastoma but remains unknown.

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Candidiasis is a very common malady in the head neck region. This review will concentrate on intraoral, pharyngeal and perioral manifestations and treatment. A history of the origins associated with candidiasis will be introduced.

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The aim of this study was to compare the immunoexpression of epithelial mucins (MUCs) in salivary duct cysts, papillary cystadenomas, and mucoepidermoid carcinomas and to evaluate if any of these markers could be useful for differentiating between mucoepidermoid carcinoma and papillary cystadenoma. We also sought to validate the p63 expression pattern found to differentiate between mucoepidermoid carcinoma and papillary cystadenoma. Immunoexpression of MUC1, MUC2, MUC4, MUC7, and p63 was studied and quantified in 22 mucoepidermoid carcinomas, 12 papillary cystadenomas, and 3 salivary duct cysts.

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Objectives: To retrospectively study the prevalence of perineural invasion (PNI) in cases of mucoepidermoid carcinoma (MEC). The study evaluated if previously assessed PNI would be increased by re-review of the original hematoxylin and eosin-stained (H&E) slides and also review of slides reacted immunohistochemically with S100 to enhance nerve visualization and whether this is associated with clinical outcome.

Study Design: Thirty-one cases were reviewed for PNI with H&E-stained slides as well as S-100-reacted slides.

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Osteochemonecrosis: an overview.

Head Neck Pathol

December 2014

Osteonecrosis of the jaw to a certain extent has been with us for many years. But recently the advent of various medications such as bisphosphonates, VEGF inhibitors, tyrosine kinase inhibitors and humanized antibodies to osteoclastic action have resulted in thousands of cases. While the bisphosphonates continue to be the most common medication associated with osteochemonecrosis antibodies such as denosumab which irreversibly act on osteoclastic action are also being reported.

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Zoonotic anatrichosomiasis in a mother and daughter is reported. Both presented with a 10-week history of multiple painful oral ulcers. Biopsy specimens revealed the presence of small, coiled trichuroid nematodes with distinctive morphological features, including stichocytes and paired bacillary bands.

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Objective. The purpose of this study was to determine the prevalence of tonsiliths in patients attending the oral and maxillofacial radiology clinic of The University of Iowa and to determine if there is any correlation between the presence of tonsiliths and the presence of stones in other body tissues, ducts, or organs. Study Design.

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Introduction: The goal of this project was to evaluate the performance of dental pulp sensibility testing with Endo Ice (1,1,1,2-tetrafluoroethane) and an electric pulp tester (EPT) and to determine the effect of several variables on the reliability of these tests.

Methods: Data were collected from 656 patients seen in the University of Iowa College of Dentistry Endodontic graduate clinic. The results of pulpal sensibility tests, along with the tooth number, age, sex, number of restored surfaces, presence or absence of clinical or radiographic caries, and reported recent use of analgesic medications, were recorded.

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Objective: In 2005, the World Health Organization reclassified the parakeratinizing odontogenic keratocyst as a neoplasm. This article reviews the research leading to this reclassification, and validates a new survey tool that can be easily used to pool surgical and recurrence data from multiple offices.

Study Design: All odontogenic lesions accessioned in the Iowa Surgical Oral Pathology Laboratory between 1949 and 2010 were identified from the database.

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The Prevention of Orthopaedic Implant Infection in Patients Undergoing Dental Procedures evidence-based clinical practice guideline was codeveloped by the American Academy of Orthopaedic Surgeons (AAOS) and the American Dental Association. This guideline replaces the previous AAOS Information Statement, "Antibiotic Prophylaxis in Bacteremia in Patients With Joint Replacement," published in 2009. Based on the best current evidence and a systematic review of published studies, three recommendations have been created to guide clinical practice in the prevention of orthopaedic implant infections in patients undergoing dental procedures.

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Background. Cone beam computed tomography (CBCT) has gained widespread acceptance in dentistry for a variety of applications. Most dentists who are not radiologists/trained in radiology are generally not familiar with interpretation of anatomical structures and/or pathosis outside their area of primary interest, as often this was not within the scope of their training.

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Background: This narrative review of osteonecrosis of the jaw in patients with low bone mass receiving treatment with antiresorptive agents is based on an appraisal of the literature by an advisory committee of the American Dental Association Council on Scientific Affairs. It updates the committee's 2008 advisory statement.

Methods: The authors searched MEDLINE for literature published between May 2008 (the end date of the last search) and February 2011.

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We describe a case of zoonotic anatrichosomiasis in a patient from Illinois. A 44-year-old immigrant from Mexico originally presented with a history of multiple oral ulcers and two submucosal nodules on the dorsal surface of the tongue. An incisional biopsy was taken to assist with diagnosis.

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Nerve sheath myxoma (NSM) is a benign peripheral nerve sheath tumor that rarely occurs in the oral cavity. Among the 23 reported intraoral cases, no lesion has previously been reported on the gingiva. In this report, we describe the first gingival case of oral neurothekeoma with histopathologic and immunohistochemical characteristics.

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Background: and Overview. In 2005, the American Dental Association (ADA) Council on Scientific Affairs convened an expert panel to develop clinical recommendations for dentists treating patients who are receiving oral bisphosphonate therapy. The Journal of the American Dental Association published the resulting report in 2006.

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This study evaluated the amount of calcium hydroxide [Ca(OH)(2))] remaining in canals after removal with various techniques including combinations of NaOCl with EDTA irrigation, hand filing, rotary instrumentation, or ultrasonics. The mesial canals of 12 mandibular molars were uniformly instrumented. Teeth were sectioned longitudinally along the length of the instrumented canals.

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