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https://www.readbyqxmd.com/read/28818288/melanoma-arising-in-a-melanocytic-nevus
#1
A Martín-Gorgojo, E Nagore
The association of melanoma with a preexisting melanocytic nevus varies considerably between series, depending on whether the association is based on histological signs (4%-72%) or a clinically evident lesion (42%-85%). Histological association with a nevus correlates with favorable prognostic factors, whereas a clinical association correlates with unfavorable factors. In this review, we discuss the characteristics of nevus-associated melanoma from different perspectives: Whiteman's divergent pathway hypothesis for the development of cutaneous melanoma; and the factors involved in nevogenicity, including both the genetic and molecular factors involved in the development of the melanoma and its precursor lesions...
August 14, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/28815132/precision-diagnosis-of-melanoma-and-other-skin-lesions-from-digital-images
#2
Abhishek Bhattacharya, Albert Young, Andrew Wong, Simone Stalling, Maria Wei, Dexter Hadley
Melanoma will affect an estimated 73,000 new cases this year and result in 9,000 deaths, yet precise diagnosis remains a serious problem. Without early detection and preventative care, melanoma can quickly spread to become fatal (Stage IV 5-year survival rate is 20-10%) from a once localized skin lesion (Stage IA 5- year survival rate is 97%). There is no biomarker for melanoma in clinical use, and the current diagnostic criteria for skin lesions remains subjective and imprecise. Accurate diagnosis of melanoma relies on a histopathologic gold standard; thus, aggressive excision of melanocytic skin lesions has been the mainstay of treatment...
2017: AMIA Summits on Translational Science Proceedings
https://www.readbyqxmd.com/read/28813743/combined-melanocytic-nevus-superficial-congenital-and-deep-penetrating-types-with-fibroepithelioma-of-pinkus-collision-tumor-a-case-report
#3
Ashwyna Sunassee, Amy M Kerkvliet, Ali D Jassim
We present a case of collision tumor composed of a combined melanocytic nevus with superficial congenital and deep penetrating components and a fibroepithelioma of Pinkus on the left lumbar back of a 21-year-old male. He presented to the dermatologist for evaluation of numerous moles, and the lesion in question was described as a brown variegated papule with slightly irregular shape and irregular borders. This case is being reported as it is very unusual to see a fibroepithelioma of Pinkus in conjunction with a melanocytic lesion...
August 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28812059/clinician-s-update-on-the-benign-premalignant-and-malignant-skin-tumours-of-the-vulva-the-dermatologist-s-view
#4
REVIEW
Freja Lærke Sand, Simon Francis Thomsen
Correct and rapid diagnosis of skin tumours often requires biopsy and histopathological examination to differentiate benign lesions such as seborrhoeic keratoses or melanocytic naevi from premalignant and malignant lesions such as malignant melanoma. Particularly, to the untrained eye, any benign skin tumour-pigmented or nonpigmented-is easily mistaken for a malignant lesion. Qualified clinical evaluation is paramount in order to reduce the frequency of unwarranted skin biopsies. Herein, the most common benign, premalignant, and malignant vulvar skin tumours are reviewed...
2017: International Scholarly Research Notices
https://www.readbyqxmd.com/read/28802492/blue-nevi-and-related-tumors
#5
REVIEW
Artur Zembowicz
The major entities related to blue nevus are common blue nevus, cellular blue nevus, atypical blue nevus, and malignant blue nevus. These lesions share presence of dermal pigmented dendritic melanocytes derived from embryonal precursors to melanocytes, Schwann cells, and glial cells migrating to the skin from the ventral neural crest. Genetically, blue nevi harbor mutations in G-protein-coupled receptor subunits GNAQ and GNA11. Progression to malignant blue nevus is associated with additional mutations and partial gains and losses of chromosomal material...
September 2017: Clinics in Laboratory Medicine
https://www.readbyqxmd.com/read/28802002/congenital-neurocristic-cutaneous-hamartoma-with-poliosis-a-case-report
#6
Lauren M Wilson, Knox J Beasley, Timothy C Sorrells, Viviana V Johnson
Neurocristic Cutaneous Hamartomas (NCH) are rare, pigmented skin lesions derived from the abnormal migration of neural crest cells. 1 2 We report the case of a 57-year-old female with a congenital localized area of poliosis and underlying pigmented patch on her scalp. Analysis of two punch biopsies yielded features consistent with NCH. Histopathology revealed schwannian-differentiated spindle cells and melanocytic components in the dermis. The spindle cells stained positively with S-100 and the stroma showed a prominent CD34 stain...
August 12, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28796000/genomic-analysis-of-pigmented-epithelioid-melanocytomas-reveals-recurrent-alterations-in-prkar1a-and-prkca-genes
#7
Jarish N Cohen, Nancy M Joseph, Jeffrey P North, Courtney Onodera, Artur Zembowicz, Philip E LeBoit
Pigmented epithelioid melanocytoma (PEM) is a rare cutaneous melanocytic tumor first described as epithelioid blue nevus in patients with the Carney Complex (CC). PEM was among the first established examples of an intermediate class of melanocytic tumors, including atypical Spitz tumors, with frequent metastasis to lymph nodes but only rare extranodal spread. Sporadic and CC-associated PEM are essentially histologically indistinguishable. A subset of PEM shows loss of cytoplasmic expression of the protein kinase A regulatory subunit alpha (PRKAR1A), a tumor suppressor gene mutated in 70% of families with CC...
August 8, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28794873/congenital-and-infantile-malignant-melanoma-of-the-scalp-a-systematic-review
#8
REVIEW
Sohaib Tariq, Hussain Shallwani, Muhammad Waqas, Muhammad Ehsan Bari
Congenital and infantile malignant melanomas are rare and typically carry poor prognosis. The purpose of this article was to review the data on congenital and infantile malignant melanomas of the scalp in order to understand its presentation, diagnosis, management, and outcomes of congenital melanoma of scalp. We searched PubMed, CINAHL and Cochrane databases. Ten cases of congenital and 3 cases of infantile malignant melanoma of scalp were identified. The diagnosis was confirmed by biopsy and histological analysis for confirmation...
September 2017: Annals of Medicine and Surgery
https://www.readbyqxmd.com/read/28763337/folliculotropic-metastatic-melanoma-a-case-report-and-review-of-the-literature
#9
Elizabeth L McKinnon, Kelly L West, Russell A Ball, Nathan Wright, Raymond L Barnhill
Folliculotropic metastasis of cutaneous melanoma is rare, with only 5 published case reports in the English language literature since it was first described in 2009. We report a 41-year-old man with a primary cutaneous melanoma of the right upper preauricular region with metastatic spread to the parotid gland and pulmonary lymph nodes. Excision of the primary lesion was performed and immunotherapy was initiated. Sixteen months later, the patient presented with 2 new lesions of the left forehead and left neck...
September 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28761291/various-dermatoses-what-the-patients-with-cutaneous-melanoma-had-anxiety-for-the-recurrence-during-postoperative-surveillance
#10
Hyun-Joo Lee, Hyunju Jin, Hyang-Suk You, Woo-Haing Shim, Jeong-Min Kim, Gun-Wook Kim, Je-Ho Mun, Hoon-Soo Kim, Hyun-Chang Ko, Byung-Soo Kim, Moon-Bum Kim
BACKGROUND: The incidence and mortality rates associated with cutaneous melanoma (CM) have steadily increased over the last 20 years. Even with successful treatment, melanoma patients usually experience substantial anxiety regarding the development of terrible recurrence. To date, few studies have investigated various dermatoses what the patients with CM had anxiety for the recurrence during postoperative surveillance (Dw). OBJECTIVE: To describe various Dw and to evaluate the risk of subsequent malignant skin disease in patients with CM...
August 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28760346/a-defect-in-the-mitochondrial-protein-mpv17-underlies-the-transparent-casper-zebrafish
#11
Gianluca D'Agati, Rosanna Beltre, Anna Sessa, Alexa Burger, Yi Zhou, Christian Mosimann, Richard M White
The casper strain of zebrafish is widely used in studies ranging from cancer to neuroscience. casper offers the advantage of relative transparency throughout adulthood, making it particularly useful for in vivo imaging by epifluorescence, confocal, and light sheet microscopy. casper was developed by selective breeding of two previously described recessive pigment mutants: 1) nacre, which harbors an inactivating mutation of the mitfa gene, rendering the fish devoid of pigmented melanocytes; and 2) roy orbison, a mutant with so-far unidentified genetic cause that lacks reflective iridophores...
July 28, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28757886/the-influence-of-a-gene-expression-signature-on-the-treatment-of-diagnostically-challenging-melanocytic-lesions
#12
Clay Cockerell, Jaime Tschen, Steven D Billings, Brent Evans, Krystal Brown, Colleen Rock, Loren E Clarke
AIM: The effect of a gene-expression-based test on treatment of melanocytic neoplasms by dermatologists was evaluated. PATIENTS & METHODS: Pathologists submitted diagnostically challenging melanocytic neoplasms to a clinical laboratory for testing accompanied by pretest surveys documenting the intended treatment recommendations. The actual treatment rendered by dermatologists was then documented after testing. Changes between the pretest recommendations and actual treatment were analyzed...
March 2017: Personalized Medicine
https://www.readbyqxmd.com/read/28750902/adaptable-pattern-recognition-system-for-discriminating-melanocytic-nevi-from-malignant-melanomas-using-plain-photography-images-from-different-image-databases
#13
Spiros A Kostopoulos, Pantelis A Asvestas, Ioannis K Kalatzis, George C Sakellaropoulos, Theofilos H Sakkis, Dionisis A Cavouras, Dimitris T Glotsos
OBJECTIVE: The aim of this study was to propose features that evaluate pictorial differences between melanocytic nevus (mole) and melanoma lesions by computer-based analysis of plain photography images and to design a cross-platform, tunable, decision support system to discriminate with high accuracy moles from melanomas in different publicly available image databases. MATERIAL AND METHODS: Digital plain photography images of verified mole and melanoma lesions were downloaded from (i) Edinburgh University Hospital, UK, (Dermofit, 330moles/70 melanomas, under signed agreement), from 5 different centers (Multicenter, 63moles/25 melanomas, publicly available), and from the Groningen University, Netherlands (Groningen, 100moles/70 melanomas, publicly available)...
September 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/28748967/melanocytic-nevi-and-non-neoplastic-hyperpigmentations
#14
C Clemente
This is the first of three chapters that will be progressively published on Pathologica as updating activity of the Italian Study Group of Dermatopathology (GISD), Italian Society of Pathology and Cytology (SIAPeC IAP). The first chapter concerns non-neoplastic hyperpigmented skin lesions and nevi, the second will address the topics of dysplastic nevus, borderline and low malignant potential melanocytic proliferations and the third melanoma in its variants and differential diagnoses with a supplement on the immunohistochemistry and molecular support to diagnostic and prognostic definition of nevi and melanomas...
June 2017: Pathologica
https://www.readbyqxmd.com/read/28733877/expanding-the-spectrum-of-colonic-manifestations-in-tuberous-sclerosis-l-cell-neuroendocrine-tumor-arising-in-the-background-of-rectal-pecoma
#15
David L Kolin, Kai Duan, Bo Ngan, J Ted Gerstle, Monika K Krzyzanowska, Gino R Somers, Ozgur Mete
Tuberous sclerosis complex (TSC) is an autosomal dominant neurocutaneous condition that predisposes to numerous proliferative lesions, including perivascular epithelioid cell tumors (PEComas), such as lymphangioleiomyomatosis (LAM) and angiomyolipomas, and rare neuroendocrine neoplasms. We describe herein a TSC2-harboring tuberous sclerosis patient manifesting with a synchronous well-differentiated L-cell rectal neuroendocrine tumor and leiomyomatosis-like LAM of the rectum. The background large bowel wall was thickened by confluent nodular areas comprising vessels and spindle-to-epithelioid cells, which are immunoreactive for myoid (smooth muscle actin, muscle specific actin, and desmin) and melanocytic markers (HMB45, Melan-A, microphthalmia transcription factor, and CD117)...
July 21, 2017: Endocrine Pathology
https://www.readbyqxmd.com/read/28728861/-vitiligo-occurring-on-dermal-melanocytosis-nevus-of-ota-in-a-dark-skinned-patient
#16
K-C Ahogo, I-P Gbery, B Vagamon, O-A Ouattara, K-A Kouassi, H-S Kourouma, Y-I Kouassi
BACKGROUND: Nevus of Ota is a rare disease most frequently found in Asians. It presents clinically as a bluish gray hyperpigmentation of one side of the face. Transformation into melanoma and glaucoma are the main risks. The appearance of vitiligo lesions with poliosis within a nevus of Ota is exceptional. PATIENTS AND METHODS: A 22-year-old female patient with a nevus of Ota consulted for depigmentation of the eyelashes. Physical examination revealed hyperpigmentation in the right orbitofrontal part of her face, achromic macules and eyelash poliosis...
July 17, 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28727603/nodular-lesion-in-cheek-with-a-hair-tuft
#17
David Ayala, Inés Escandell, Jose M Martin
Trichostasis spinulosa is a rarely diagnosed disorder of the pilosebaceous unit, characterized by retention of telogen hairs within the dilated follicles. A hair tuft can be seen protruding from the follicles. We present a case of trichostasis spinulosa associated with intradermal melanocytic nevi, where dermoscopy helps to identify this entity.
August 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28721529/-dermoscopy-for-malignant-and-benign-skin-tumors-indication-and-standardized-terminology
#18
A Blum, J Kreusch, W Stolz, H Haenssle, R Braun, R Hofmann-Wellenhof, P Tschandl, I Zalaudek, H Kittler
Dermoscopy has a high diagnostic accuracy in pigmented and nonpigmented malignant and benign skin tumors. These microscopic in vivo examinations with polarized and nonpolarized light are effective in the early detection of malignant skin tumors and reduce the number of unnecessary excisions of benign skin tumors. The selection of the skin lesions is crucial for the diagnostic accuracy of the dermoscopic examination. Not only large pigmented skin lesions, but also small hypo-, de-, or nonpigmented skin lesions, should be examined dermatoscopically as well as skin lesions that have changed in shape and/or color...
August 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28707403/melanocytic-lesion-evolution-patterns-with-targeted-therapies-and-immunotherapies-for-advanced-metastatic-melanoma-an-observational-study
#19
Cathy Yunjia Zhao, Shelley Ji Eun Hwang, Deepal Wakade, Giuliana Carlos, Rachael Anforth, Pablo Fernández-Peñas
BACKGROUND/OBJECTIVES: Various cutaneous side-effects have been reported with anti-melanoma systemic therapies. This study investigated the changes in melanocytic lesion pigmentation in patients on four different therapies. METHODS: We analysed the serial dermatoscopic photographs of atypical melanocytic lesions taken from patients with advanced metastatic melanoma on four different systemic therapies (selective BRAF-inhibitor monotherapy, dabrafenib combined with trametinib [D&T], anti-programmed cell death protein 1 [anti-PD1] therapies, and anti-PD1 combined with ipilimumab) seen from February 2013 to May 2016...
July 14, 2017: Australasian Journal of Dermatology
https://www.readbyqxmd.com/read/28706850/pneumothorax-caused-by-cystic-and-nodular-lung-metastases-from-a-malignant-uterine-perivascular-epithelioid-cell-tumor-pecoma
#20
Shouichi Okamoto, Moegi Komura, Yasuhisa Terao, Aiko Kurisaki-Arakawa, Takuo Hayashi, Tsuyoshi Saito, Shinsaku Togo, Akira Shiokawa, Keiko Mitani, Etsuko Kobayashi, Toshio Kumasaka, Kazuhisa Takahashi, Kuniaki Seyama
Perivascular epithelioid cell tumors (PEComas) are mesenchymal neoplasms with immunoreactivity for both melanocytic and smooth muscle markers. PEComas occur at multiple sites, and malignant PEComas can undergo metastasis, recurrence and aggressive clinical courses. Although the lung is a common metastatic site of PEComas, they usually appear as multiple nodules but rarely become cystic or cavitary. Here, we describe a female patient whose lungs manifested multiple cystic, cavity-like and nodular metastases 3 years after the resection of uterine tumors tentatively diagnosed as epithelioid smooth muscle tumors with uncertain malignant potential...
2017: Respiratory Medicine Case Reports
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