Results 31 to 40 of about 306,099 (237)
Biomolecules, 2020 Recent studies have demonstrated the usefulness of convolutional neural networks (CNNs) to classify images of melanoma, with accuracies comparable to those achieved by dermatologists. However, the performance of a CNN trained with only clinical images of
S. Jinnai +5 more
semanticscholar +1 more source
Melanocytic Nevus of the Colon
Case Reports in Gastroenterology, 2019 Here, we report a very rare case of melanocytic nevus of the colon. A 54-year-old woman with an unremarkable medical history visited our hospital for screening colonoscopy. Colonoscopy revealed a pigmented flat lesion in the ascending colon. Histological
Noriyuki Uesugi +5 more
doaj +1 more source
Pigmented Epithelioid Melanocytoma: Case Report
Revista da Sociedade Portuguesa de Dermatologia e Venereologia, 2021 Pigmented epithelioid melanocytoma is a rare, newly described melanocytic tumor that encompasses lesions previously classified as animal type melanomas and epithelioid blue nevus of the Carney complex.
Eduardo Scardazzi Silva Ragni +4 more
doaj +1 more source
International Journal of Molecular Sciences, 2017 Pigmented epithelioid melanocytoma (PEM) is a tumor encompassing epithelioid blue nevus of Carney complex (EBN of CNC) and was previously termed animal-type melanoma.
A. Tarasen +5 more
semanticscholar +1 more source
Optimal number of pigments in photosynthetic complexes [PDF]
New J. Phys. 14, 093017 (2012), 2012 We study excitation energy transfer in a simple model of photosynthetic complex. The model, described by Lindblad equation, consists of pigments interacting via dipole-dipole interaction. Overlapping of pigments induces an on-site energy disorder, providing a mechanism for blocking the excitation transfer.
arxiv +1 more source
Hyperspectral Pigment Analysis of Cultural Heritage Artifacts Using the Opaque Form of Kubelka-Munk Theory [PDF]
Proc. SPIE 10986, Algorithms, Technologies, and Applications for
Multispectral and Hyperspectral Imagery XXV, 1098611, 2019, 2021 Kubelka-Munk (K-M) theory has been successfully used to estimate pigment concentrations in the pigment mixtures of modern paintings in spectral imagery. In this study the single-constant K-M theory has been utilized for the classification of green pigments in the Selden Map of China, a navigational map of the South China Sea likely created in the early
arxiv +1 more source
An update on congenital melanocytic nevus syndrome: A case report and literature review
Journal of cutaneous pathology, 2021 Congenital melanocytic nevus syndrome (CMNS) is a rare condition characterized by pigmented skin lesions that are usually present at birth and are associated with an increased risk of neurological abnormalities and malignant melanoma.
Lilaf Abdulmajid +10 more
semanticscholar +1 more source
Pigment Cell &Melanoma Research, Volume 36, Issue 1, Page 6-18, January 2023., 2023 Abstract Melanin is a free‐radical scavenger, antioxidant, and broadband absorber of ultraviolet (UV) radiation which protects the skin from environmental carcinogenesis. However, melanin synthesis and UV‐induced reactive melanin species are also implicated in melanocyte genotoxicity. Here, we attempted to reconcile these disparate functions of melanin
Tirzah J. Weiss +15 more
wiley +1 more source
Indian Journal of Dermatology, 2015 Halo phenomenon of nevus may be observed as a circular reaction, although it is unusual around tumors. A 29-year-old woman presented with a pigmented lesion on the cheek since three years.
Pinar Yuksel Basak +2 more
doaj +1 more source
Indian Journal of Paediatric Dermatology, 2020 Giant congenital melanocytic nevus (GCMN) is a deeply pigmented lesion, often associated with hypertrichosis and multiple scattered satellite lesions. During infancy apart from textural changes, rapidly growing “proliferative nodules” mimicking melanoma ...
Sudharani Chintagunta +2 more
doaj +1 more source