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Acral melanoma

Katharina Wiedemeyer, Antonio Guadagno, Jonathan Davey, Thomas Brenn
Spitz nevi on acral sites are rare and poorly documented. The combination of Spitzoid cytomorphology and atypical architectural features of the junctional component may lead to an erroneous diagnosis of melanoma. To study the clinicopthologic and immunohistochemical features, 50 Spitz nevi localized on the distal extremities were retrieved from departmental files. Clinical data and follow-up were obtained and the histologic features were analyzed. P16 and P21 immunohistochemical staining of the dermal component was compared with that of 10 acral lentiginous melanomas and 10 acral nevi...
March 13, 2018: American Journal of Surgical Pathology
Christian S Hinrichs
As oncogenes drive carcinogenesis and promote cancer cell survival, they are highly attractive therapeutic targets, and oncogene-targeting small molecules have achieved some clinical success. While many oncogenes are presently considered to be "druggable," tumors often acquire treatment resistance, and patients are rarely cured in response to oncogene-specific treatment. In this issue of the JCI, Veatch and colleagues describe a patient with metastatic acral melanoma who experienced a complete tumor response following infusion of tumor-infiltrating T cells that targeted multiple tumor antigens, including a BRAFV600E driver mutation...
March 12, 2018: Journal of Clinical Investigation
Chanki Yu, Sejung Yang, Wonoh Kim, Jinwoong Jung, Kee-Yang Chung, Sang Wook Lee, Byungho Oh
BACKGROUND/PURPOSE: Acral melanoma is the most common type of melanoma in Asians, and usually results in a poor prognosis due to late diagnosis. We applied a convolutional neural network to dermoscopy images of acral melanoma and benign nevi on the hands and feet and evaluated its usefulness for the early diagnosis of these conditions. METHODS: A total of 724 dermoscopy images comprising acral melanoma (350 images from 81 patients) and benign nevi (374 images from 194 patients), and confirmed by histopathological examination, were analyzed in this study...
2018: PloS One
Giulia M Ravaioli, Emi Dika, Martina Lambertini, Marco A Chessa, Pier A Fanti, Annalisa Patrizi
Acral lentiginous melanoma (ALM) is the most common type of malignant melanoma (MM) in Asians, Afro-Americans and Middle-Easterns. It represents 1.5-10% of all MM cases, being the most common histological type of MM arising on palms, soles and nail apparatus, which is more generically defined as acral MM. To date no risk factors have been officially established, however a history of trauma may be involved in the pathogenesis of acral MM. This shows heterogeneous clinical features and frequently presents with advanced stage and aggressive behaviour, often as a result of misdiagnosis or delayed identification...
March 6, 2018: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
Xiaojing Kang, Ying Zeng, Junqin Liang, Jing Li, Danyang Ren, Li Chai, Zhenzhu Sun, Shirong Yu, Xiujuan Wu, Wen Han, Weijia Wang
Malignant melanoma (MM) is a highly malignant melanocytic tumor, it occurs mostly in the skin, the mucous membrane close to the skin, but also in the tunicae rhagoides and the pia mater. The Uyghur is the largest ethnic group living in the Xinjiang Uyghur Autonomous Region of China, accounting for 46% of the total population of 20 million. Large-scale studies on MMs in Asian countries are limited. This study aimed to investigate BRAF mRNA expression and mutations in Chinese Uyghur patients with MMs and to identify the clinical features associated with these parameters...
January 2018: Medicine (Baltimore)
Paulo H D M Brandão, Eduardo Bertolli, Eduardo Doria-Filho, Ivan D A O Santos Filho, Mariana P de Macedo, Clovis A L Pinto, João P Duprat Neto
BACKGROUND: Minor basin or in transit node drainage can be found in patients with cutaneous melanoma who undergo sentinel node biopsy. Its clinical impact is still unclear. Our objective is to evaluate clinical outcomes in patients who presented with in transit sentinel node (ITN) drainage. MATERIAL AND METHODS: Retrospective analysis of patients who underwent sentinel node biopsy (SNB) in a single Brazilian institution between 2000 and 2015. RESULTS: Our cohort comprised 1223 SNB...
February 26, 2018: Journal of Surgical Oncology
Georgi Tchernev, Ivan Pidakev, Anastasiya Atanasova Chokoeva, Uwe Wollina, Torello Lotti, Irina Yungareva, Ilia Lozev, Georgi Konstantinov Maximov
Interdigital spaces could be an area of affection of a various cutaneous conditions, most of them with benign origin. The spectrum of differential diagnosis of pigmented interdigital lesions with a recent occurrence is not so wide, in contrast. When considering pigmented lesions in the interdigital area, the most harmless differential diagnosis is a traumatic hematoma. But what would happen if we based our therapeutic behaviour or suspicious and unconfirmed harmless diagnosis, instead of considering the real life-threatening once with priority, if we kept in mind that acral lentiginous melanoma has rather an aggressive course and is the main cause of death in skin cancer patients? We present a case of misdiagnosed interdigital melanoma, treated as a hemangioma with curettage, with almost fatal consequences, in regard to uncontrolled tumor progression as a result of the wrong traumatic procedure in one hand, and the lack of adequate screening and follow up, leading to progress of the disease with lymph node metastasis and poor prognosis in general...
January 25, 2018: Open Access Macedonian Journal of Medical Sciences
Tianxiao Xu, Meng Ma, Jie Dai, Sifan Yu, Xiaowen Wu, Huan Tang, Jiayi Yu, Junya Yan, Huan Yu, Zhihong Chi, Lu Si, Xinan Sheng, Chuanliang Cui, Yan Kong, Jun Guo
Acral melanoma (AM) is a rapidly progressing subtype of melanoma with poor prognosis. The complete array of molecular changes that occur during AM metastasis remains unclear. In this study, we compared the gene expression profiles of six primary and 12 lymph node metastatic AM samples by tissue microarray analysis. We found that the expression levels of 396 genes were increased, and that of 766 genes were decreased in the metastatic tissues compared with that in the primary tumors. The top 19 genes upregulated in the metastatic tissue specimens were selected for high-content short interfering (si)RNA screening...
February 13, 2018: Human Pathology
A E Cust
No abstract text is available yet for this article.
February 2018: British Journal of Dermatology
Alfredo Agulló, Brian Hinds, Mónica Larrea, Ignacio Yanguas
Clinically amyopathic dermatomyositis (CADM) is a subset of dermatomyositis (DM) that has conventional cutaneous manifestations of DM, but paradoxically, little or no muscle involvement. In 2005, a novel antibody was described in association with CADM - anti-melanoma differentiation-associated gene 5 (anti-MDA5). Patients with this serologic marker have a characteristic mucocutaneous phenotype consisting of skin ulceration among other signs. We describe the case of a 46-year-old woman with CADM, elevated anti-MDA5 autoantibodies, and unusual clinical features (livedo racemosa, florid acral edema) among the classical phenotype of MDA5 DM (arthralgias, ulcerations, panniculitis) and classical DM lesions (Gottron papules, heliotrope rash)...
January 2018: Indian Dermatology Online Journal
Corina-Maria Botici, Lăcrimioara Covaci, Claudia Judea-Pusta, Andrei Paşcalău
Objective: The main objective of this paper is to emphasize the importance of the early diagnosis of certainty in the cases of acral-acroma malignant melanoma in order to increase the survival rate. Method: The paper is a review of specialty literature and presents a clinical case of acral-acroma malignant melanoma. Clinical case: acral-acroma malignant melanoma with confirmed lymph node metastases and possibly secondary remote dissemination to the skin in a male patient aged 16 years...
2018: Clujul Medical (1957)
Minho Lee, Jonghwan Yoon, Yeun-Jun Chung, Soo Young Lee, Jin Young Choi, Ok Ran Shin, Ho Yeon Park, Won-Jong Bahk, Dong Soo Yu, Young Bok Lee
No abstract text is available yet for this article.
February 10, 2018: Journal of the American Academy of Dermatology
M Zúñiga-Castillo, N V Pereira, M N Sotto
AIMS: Acral lentiginous melanoma (ALM) is the most common type of melanoma in people with darker skin phototypes. There is some evidences that the etiology, pathogenesis, risk factors, and natural history of ALM differ from those of superficial spreading melanoma (SSM). ALM behaves more aggressively than SSM, but the biological explanation for these differences remains unknown. The presence of one subtype of macrophages, termed M2-macrophage (M2-M), has been found to be related to local progression, metastasis, and poor prognosis in several neoplasms...
February 7, 2018: Histopathology
Cristina Carrera, Joan Anton Puig-Butille
Acral melanoma comprises a poorly characterized and distinct type of melanoma, in terms of differing roles of UVR, molecular substrate, distribution among all ethnicities, and poor prognosis. Haugh et al. explore clinical, histological, and molecular aspects of acral melanomas and provide insights into the complexity of these tumors.
February 2018: Journal of Investigative Dermatology
Joshua R Veatch, Sylvia M Lee, Matthew Fitzgibbon, I-Ting Chow, Brenda Jesernig, Thomas Schmitt, Ying Ying Kong, Julia Kargl, A McGarry Houghton, John A Thompson, Martin McIntosh, William W Kwok, Stanley R Riddell
T cells specific for neoantigens encoded by mutated genes in cancers are increasingly recognized as mediators of tumor destruction after immune checkpoint inhibitor therapy or adoptive cell transfer. Unfortunately, most neoantigens result from random mutations and are patient specific, and some cancers contain few mutations to serve as potential antigens. We describe a patient with stage IV acral melanoma who obtained a complete response following adoptive transfer of tumor infiltrating lymphocytes (TIL). Tumor exome sequencing surprisingly revealed less than 30 somatic mutations, including oncogenic BRAF V600E...
January 23, 2018: Journal of Clinical Investigation
S Borsari, R Pampena, E Benati, C Bombonato, K Athanassios, E Moscarella, A Lallas, G Argenziano, G Pellacani, C Longo
BACKGROUND: Although several dermoscopic features of in situ melanoma (MIS) have been identified, data on confocal features for MIS are still lacking. OBJECTIVES: To identify RCM (reflectance confocal microscopy) features of MIS and to develop a diagnostic score for MIS while combining dermoscopy and RCM. METHODS: 120 MIS and 213 nevi (test set) were retrospectively analysed to assess the presence of dermoscopic and RCM criteria. Facial and acral lesions have been excluded...
January 21, 2018: British Journal of Dermatology
Marianne Lerch, Carlo Mainetti, Benedetta Terziroli Beretta-Piccoli, Thomas Harr
Recognition and timely adequate treatment of erythema multiforme remain a major challenge. In this review, current diagnostic guidelines, potential pitfalls, and modern/novel treatment options are summarized with the aim to help clinicians with diagnostic and therapeutic decision-making. The diagnosis of erythema multiforme, that has an acute, self-limiting course, is based on its typical clinical picture of targetoid erythematous lesions with predominant acral localization as well as histological findings...
February 2018: Clinical Reviews in Allergy & Immunology
Junya Yan, Xiaowen Wu, Jiayi Yu, Huan Yu, Tianxiao Xu, Kevin M Brown, Xue Bai, Jie Dai, Meng Ma, Huan Tang, Lu Si, Zhihong Chi, Xinan Sheng, Chuanliang Cui, Yan Kong, Jun Guo
BACKGROUND: Neuroblastoma rat-sarcoma (NRAS) mutations have been described in Chinese patients with melanoma. However, the status and the clinical significance of NRAS gain have not been investigated on a large scale. METHODS: A total of 657 melanoma samples were included in the study. NRAS copy number was examined using the QuantiGene Plex DNA assay. The sensitivities of cell lines and patient-derived xenograft (PDX) models containing NRAS gain to a MAP/ERK kinase (MEK) inhibitor (binimetinib) were also evaluated...
December 11, 2017: European Journal of Cancer
Hye Rim Moon, Hyun Ji Kang, Chong Hyun Won, Sung Eun Chang, Mi Woo Lee, Jee Ho Choi, Woo Jin Lee
No abstract text is available yet for this article.
January 2018: Journal of the American Academy of Dermatology
A Desai, R Ugorji, A Khachemoune
Acral melanoma (AM) is a rare subtype of cutaneous malignant melanoma found on acral skin, primarily on the soles of the feet. Although rare, it is the most common subtype of melanoma found in patients of African or Asian ethnicity and has a poor prognosis, often because of the more advanced stage of presentation at diagnosis. In the second of this two-part series, we review the clinical presentation, histopathology, diagnosis and management of AM. Clinically, AM presents as a variegated lesion with blue-black pigment and irregular borders on acral skin...
March 2018: Clinical and Experimental Dermatology
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