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At least 559 records · Page 31Linked to original sources

Oral medicine--update for the dental practitioner: red and pigmented lesions.

This series provides an overview of current thinking in the more relevant areas of oral medicine for primary care practitioners, written by the authors while they were holding the Presidencies of the European Association for Oral Medicine and the British Society for Oral Medicine, respectively. A book containing additional material will be published. The series gives the detail necessary to assist the primary dental clinical team caring for patients with oral complaints that may be seen in general dental practice. Space precludes inclusion of illustrations of uncommon or rare disorders, or discussion of disorders affecting the hard tissues. Approaching the subject mainly by the symptomatic approach--as it largely relates to the presenting complaint--was considered to be a more helpful approach for GDPs rather than taking a diagnostic category approach. The clinical aspects of the relevant disorders are discussed, including a brief overview of the aetiology, detail on the clinical features and how the diagnosis is made. Guidance on management and when to refer is also provided, along with relevant websites which offer further detail.

Erythroplasia↗

Human ACTH hypersensitivity syndrome associated with abnormalities of the ACTH receptor gene.

OBJECTIVE: Activating mutations of the ACTH receptor have not been previously described. We investigated a 69-year-old woman with normal blood cortisol but undetectable blood ACTH concentrations. The aim of this study was to evaluate her hypothalamo-pituitary-adrenal axis by measuring circadian variation in blood ACTH and cortisol, and by performing CRH and ACTH stimulation and dexamethasone suppression tests. We also examined biological activity of her circulating blood ACTH using bovine adrenocortical cell suspensions and ACTH receptor gene structure by Northern blotting analysis. RESULTS: Random plasma cortisol concentrations ranged from 182 to 328 nmol/l, while ACTH concentrations were always undetectable. After an intravenous bolus injection of human CRH 100 micrograms, plasma ACTH rose slightly, while plasma cortisol increased appropriately. ACTH stimulation tests revealed that a small amount of ACTH (5 ng/kg b.w.) had the maximal cortisol stimulatory activity, and even smaller amounts of ACTH (0.5 and 0.05 ng/kg b.w.) produced significant increases in cortisol levels. ACTH bioassay of the patient's plasma demonstrated weak biological activity in the HPLC fractions which corresponded to the band of synthetic human ACTH 1-39. The ACTH receptor coding region was amplified by polymerase chain reaction using the leucocyte genomic DNA. There were two base mutations; cysteine 21-->arginine and serine 247-->glycine in the sequences coding for the first extramembranous N-terminal domain and the third extramembranous loop of the ACTH receptor. CONCLUSIONS: This patient with normal blood cortisol but undetectable ACTH levels showed increased adrenocortical sensitivity to ACTH and two point mutations in the ACTH receptor gene. This study, therefore, reports a previously undescribed syndrome--ACTH hypersensitivity syndrome--and provides insights into the molecular mechanism of ACTH receptor action.

Adrenal Cortex Function Tests↗

Topical administration of a doxorubicin-specific monoclonal antibody prevents drug-induced mouth apoptosis in mice.

One of the most severe side effects of anti-tumour chemotherapy is mucositis due to drug toxicity for rapidly dividing cells. We show here that anti-DXR monoclonal antibodies can prevent DXR-induced damage. Indeed, apoptosis, confined to the proliferative compartment of the basal mucosa, observed in the tongue of DXR-treated mice was completely inhibited by topical application of the anti-DXR antibodies.

Administration, Topical↗

Hypersensitivity of the oral mucosa: clinics and pathology.

Hypersensitivity reactions of the oral mucosa comprise an array of clinical manifestations. Some of the reactions are difficult to differentiate from toxic reactions. Hypersensitivity reactions of type I, type III, and type IV are well known, although, especially for types I and III, they are rarely encountered. Type-I reactions are most frequently seen related to application of polymers in the oral cavity, such as orthodontic bonding and fissure sealant materials. There may also be systemic manifestations such as urticaria. Type-IV reactions may be seen related to most dental materials used, from amalgam and gold to polymers. These reactions appear as chronic reddening and/or ulceration of the oral mucosa. Lichenoid reactions have histopathological characteristics compatible with type-IV hypersensitivity reactions and are the most prevalent material-adverse reactions seen in the oral cavity. A special variety inside the lips with multiple papules and/or diffuse redness has recently been identified. This lesion comprises a serious treatment challenge. Skin patch tests, applying a series of dental materials in non-toxic concentrations on the skin, have been used to identify sensitization. However, the value of those tests can be questioned. Exacerbation of geographic stomatitis may be another form of hypersensitivity to dental materials.

Dental Materials↗

Recognizing the allergic individual.

Patients with respiratory tract allergy present certain auditory and visual signs which, when correlated with the history, aid substantially in arriving at a conclusive diagnosis. The physician should be alert to the signs that indicate allergic disease. Early recognition followed by modern allergy management will help to prevent progression of the allergic process.

Adolescent↗

Chemotherapy-induced oral mucositis in adult leukemia.

Oral mucositis directly attributable to antileukemia chemotherapy occurs in almost 20% of adults undergoing such treatment. Although the mucositis is self-limited when uncomplicated by infection, the attendant extreme discomfort may produce physical and psychologic obstructions to continued anticancer treatment. Because of the ever-present risk of serious infection, drug-induced stomatitis constitutes a threat to the patient that must be kept under constant surveillance and control.

Adult↗

Unusual reaction to trifluoperazine.

A 19-year-old woman, recently discharged from the hospital and being treated for schizophrenia, presented with an unusual reaction to trifluoperazine. She complained of nausea and vomiting and experienced bilateral swelling of the tongue. Symptoms subsided when the medication was discontinued. Although dystonic reactions to high doses of phenothiazines are not uncommon, we postulate that this case represented an unusual allergic reaction to the medication.

Adult↗

Recovery of anaerobic bacteria from a glossal abscess in an adolescent.

Glossal abscess is infrequent in children. Anaerobic bacteria are rarely recovered from this infection and never have been reported in children or adolescents. A 15-year-old patient presented with a tongue abscess following trauma. Aspirate of the abscess yielded polymicrobial anaerobic flora: Prevotella melaninogenica, Fusobacterium nucleatum, and Peptostreptococcus micros. The patient recovered following incision and drainage and 14 days of antimicrobial therapy with clindamycin. This report illustrates the recovery of anaerobic bacteria from glossal abscess in an adolescent.

Abscess↗