Search results for "Melanosi"

The combination of freezing and modified atmosphere packaging inhibits melanosis in giant red shrimp

2014

Genomic characterization of mosaic cutaneous pigmentary disorders

2019

Ntroduction: Mosaic cutaneous dyschromia is strongly evocative of an underlying genetic mosaicism. These post-zygotic events are challenging for conventional diagnostic tools. Thus, genetic basis of mosaic cutaneous dyschromia still remained poorly understood. Materials and Methods: The M.U.S.T.A.R.D. cohort gathers DNA from skin biopsies of patients with mosaic cutaneous dyschromia. After a specialised phenotype analysis, they are referred to either trio exome sequencing (ES) at 200X, or targeted ultra-deep sequencing (60,000X) of candidate genes. Data are analysed with a tailored pipeline, allowing detection of both low-rate nucleotidic variations or chromosomal events. Results: From 2013…

Various forms of tobacco usage and its associated oral mucosal lesions

2016

Background To study the various forms of tobacco usage and its associated oral mucosal lesions among the patients attending Vishnu Dental College Bhimavaram. Material and methods An observational cross-sectional study was conducted in a total of 450 patients who were divided into three groups based upon type of tobacco use, as Group-1 Reverse smoking, Group-2 Conventional smoking, Group-3 Smokeless tobacco group and each group consists of 150 subjects. Results Reverse smoking was observed to be more prevalent among old females with smoker's palate and carcinomatous lesions being the most common. Conventional smoking was observed more in male patients with maximum occurrence of leukoplakia a…

Oral pigmented lesions: clinicopathologic features and review of the literature

2012

Diagnosis of pigmented lesions of the oral cavity and perioral tissues is challenging. Even though epidemiology may be of some help in orientating the clinician and even though some lesions may confidently be diagnosed on clinical grounds alone, the definitive diagnosis usually requires histopathologic evaluation. Oral pigmentation can be physiological or pathological, and exogenous or endogenous. Color, location, distribution, and duration as well as drugs use, family history, and change in pattern are important for the differential diagnosis. Dark or black pigmented lesions can be focal, multifocal or diffuse macules, including entities such as racial pigmentation, melanotic macule, melan…

Reticulate postinflammatory hyperpigmentation with band-like mucin deposition

1998

Background Mucinoses of the skin are a group of disorders sharing accumulation of mucin in the skin or hair follicles. Postinflammatory hyperpigmentation, with pigmentary incontinence, is due to loss of melanin from epidermal basal cells and its accumulation in dermal macrophages. Methods We describe clinicopathologic features of two patients presenting with the association of pigmentary incontinence with an unusual diffuse, band-like dermal deposition of mucin, clinically presenting with reticular pigmented macular lesions. Results Two patients were observed with asymptomatic, persistent, reticular, pigmented patches located in the flexures, thighs, neck and back. Histology showed melanoph…

Prevalencia, búsqueda y registro clínico asistencial de pacientes con síndrome de Peutz Jeghers en Valencia

2022

El síndrome de Peutz Jeghers es una enfermedad rara de herencia autosómica dominante causada por una mutación germinal del gen STK11/LKB1, que codifica para una proteína serina/treonina/kinasa. Consiste en poliposis hamartomatosa intestinal y extraintestinal, predisposición al cáncer e hiperpigmentación mucocutánea. Se asocia a complicaciones como dolor abdominal, sangrados gastrointestinales, anemia, prolapso y ulceración de los pólipos, obstrucción e invaginación intestinal. No existe ningún tratamiento específico, solamente la adecuada instauración de protocolos. Se incluyeron pacientes que habían acudido a 10 hospitales de la provincia de Valencia, utilizando el Conjunto Mínimo de Base …

Differential diagnosis of diffused oral mucosal pigmented lesion: a case of Dubreuilh’s melanosis

2019

Oral pigmented lesions:a retrospective analysis from Brazil

2020

Background Pigmented lesions are uncommon in the oral mucosa, and studies investigating the incidence and types of these lesions are desired to improve the diagnostic knowledge of clinicians. The aim of this study was to analyze the distribution of oral pigmented lesions in a Brazilian population. Material and Methods A retrospective descriptive cross-sectional study was performed. Oral pigmented lesions were retrieved from the files of two oral and maxillofacial pathology services from Brazil over a 45-year period (1974-2019). The clinical data and the diagnoses of each case were retrieved and included in a Microsoft Excel® database. Results From 77.074 lesions diagnosed in this period, 76…