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Melanocytic lesions

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https://www.readbyqxmd.com/read/28707403/melanocytic-lesion-evolution-patterns-with-targeted-therapies-and-immunotherapies-for-advanced-metastatic-melanoma-an-observational-study
#1
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
#2
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
https://www.readbyqxmd.com/read/28700401/wiesner-nevus-of-the-eyelid
#3
Marie Somogyi, Lance J Lyons, Vikram Durairaj
A healthy 31-year-old female presented with an elevated vascular lesion on the right lower eyelid margin. Histology results from excisional biopsy demonstrated a range of intradermally nested atypical melanocytes with negative staining for BRCA1-associated protein 1, confirming the diagnosis of Wiesner nevus. Wiesner nevi may be a cutaneous hallmark of the BRCA1-associated protein 1-associated cancer susceptibility syndrome, and to our knowledge, this is the first report of such a lesion presenting anywhere on the ocular adnexa...
July 10, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28690515/a-case-of-facial-partial-unilateral-lentiginosis-treated-with-low-fluence-1-064-nm-q-switched-neodymium-doped-yttrium-aluminum-garnet-laser
#4
En Hyung Kim
Partial unilateral lentiginosis (PUL) is an unusual pigmentary disorder characterized by numerous lentigines grouped within an area of normal skin. Although treatment is not necessary, many patients with facial PUL seek medical help for cosmetic reasons. There is no established standard treatment for PUL. Conventional lasers may cause postinflammatory hyperpigmentation because keratinocytes are injured during the process. Also, scarring, long downtime, and pain are important issues. A 19-year-old patient with facial PUL was successfully treated with low-fluence 1,064-nm Q-switched neodymium-doped yttrium aluminum garnet (QS Nd:YAG) laser...
May 2017: Case Reports in Dermatology
https://www.readbyqxmd.com/read/28686399/-reflectance-confocal-microscopy-what-future-for-dermatology
#5
Jean-Luc Levy, Sarah Norrenberg, Philippe Bahadoran
Reflectance confocal microscopy is a non invasive imaging technique which provides in vivo and real time images of different skin tissues with a resolution close to histology, however with a depth limited to superficial dermis.The first lesions that were morphologically analyzed are melanocytic lesions. Reflectance confocal microscopy has been used for about ten years in dermatology. Its progressive improvement over the years has allowed it to be an efficient tool for diagnosing cutaneous tumors. It has been developed for inflammatory dermatosis, cutaneous infections, angiomas, cosmetology...
October 12, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28681540/expression-of-monoacylglycerol-lipase-as-a-marker-of-tumour-invasion-and-progression-in-malignant-melanoma
#6
Y Baba, T Funakoshi, M Mori, K Emoto, Y Masugi, S Ekmekcioglu, M Amagai, K Tanese
BACKGROUND: Accumulating evidence suggests that the lipid lytic enzyme monoacylglycerol lipase (MAGL) promotes tumour invasion and metastasis through up-regulation of pro-tumourigenic signalling lipids in several tumour cell lines. However, the expression status of MAGL in clinical melanoma tissues and its clinico-pathological significance remain unclear. OBJECTIVE: To correlate the tumour expression status of MAGL with the clinico-pathological information of patients with malignant melanoma...
July 6, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28681498/tumescent-local-anaesthesia-for-early-dermatosurgery-in-infants
#7
M Heister, H M Häfner, H Breuninger, C Schulz, K Meier, L Kofler, C Spott, M Röcken, S M Schnabl, F C Eberle
BACKGROUND: Early paediatric dermatosurgery reveals excellent cosmetic results due to high skin-elasticity and pronounced capacity to recover from trauma. Furthermore, the size of skin lesions increases during life proportionally to skin growth and therefore early removal is of major importance. Selected local anaesthetics like prilocaine can cause methaemoglobinemia. However, in contrast to general anaesthesia many other local anaesthetics do not bare any major risks for infants. OBJECTIVE: In this retrospective study, we analysed infants aged less than 7 months receiving tumescent local anaesthesia (TLA) followed by dermatosurgery at our department between 2005 and 2015...
July 6, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28676327/anatomic-mapping-and-clinicopathologic-analysis-of-benign-acral-melanocytic-neoplasms-a-comparison-between-adults-and-children
#8
Na Hee Kim, Yoo Duk Choi, Hyun Ju Seon, Jee-Bum Lee, Sook Jung Yun
BACKGROUND: The clinicopathologic features of benign acral melanocytic neoplasms (BAMNs) remain poorly understood. OBJECTIVE: To define the clinicopathologic features of BAMNs. METHODS: We analyzed clinical data and mapped BAMNs anatomically. We also reviewed the histopathologic features of BAMNs and compared these between adults and children. RESULTS: We included 396 cases of BAMN: 335 adults and 61 children (376 acquired and 20 congenital lesions)...
July 1, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28664989/evolution-of-spitz-nevi
#9
Nazan Emiroglu, Pelin Yıldız, Dilek Biyik Ozkaya, Anıl Gulsel Bahalı, Ozlem Su, Nahide Onsun
BACKGROUND/OBJECTIVES: Spitz nevi are melanocytic lesions with clinical, dermoscopic, and histopathologic presentations that may resemble those of melanoma. The evolution of Spitz nevi is a well-known feature. The objectives of this study were to investigate the clinical and dermoscopic features of Spitz nevi and define their evolution. METHODS: A retrospective observational study was performed and 70 Spitz nevi were analyzed using clinical and dermoscopic examination...
June 30, 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28662374/multiple-oral-deep-penetrating-nevi-extending-to-the-masseter-and-buccal-fat-pad
#10
Eunae S Cho, Hye-Min Cho, Woong Nam, Hyun Sil Kim
The deep penetrating nevus (DPN) is a rare benign melanocytic tumor often clinically and histopathologically mistaken for malignant melanoma (MM) and other nevus types. This report describes an extremely rare case of multiple lesions of a large DPN in the oral cavity with extensive infiltration to the minor salivary gland, buccal fat pad, buccinators, and masseter muscles, yet with preservation of the normal anatomic architecture. After receiving a diagnosis of MM in another hospital, the patient was at risk for receiving a wide excision that the included the masticatory muscles, facial nerve, and overlying skin...
June 1, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28659278/pathologists-diagnosis-of-invasive-melanoma-and-melanocytic-proliferations-observer-accuracy-and-reproducibility-study
#11
Joann G Elmore, Raymond L Barnhill, David E Elder, Gary M Longton, Margaret S Pepe, Lisa M Reisch, Patricia A Carney, Linda J Titus, Heidi D Nelson, Tracy Onega, Anna N A Tosteson, Martin A Weinstock, Stevan R Knezevich, Michael W Piepkorn
Objective To quantify the accuracy and reproducibility of pathologists' diagnoses of melanocytic skin lesions.Design Observer accuracy and reproducibility study.Setting 10 US states.Participants Skin biopsy cases (n=240), grouped into sets of 36 or 48. Pathologists from 10 US states were randomized to independently interpret the same set on two occasions (phases 1 and 2), at least eight months apart.Main outcome measures Pathologists' interpretations were condensed into five classes: I (eg, nevus or mild atypia); II (eg, moderate atypia); III (eg, severe atypia or melanoma in situ); IV (eg, pathologic stage T1a (pT1a) early invasive melanoma); and V (eg, ≥pT1b invasive melanoma)...
June 28, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28658677/similar-but-different-how-reflectance-confocal-microscopy-may-help-in-the-diagnosis-of-pink-lesions
#12
Federica Ferrari, Sara Bassoli, Giovanni Pellacani, Giuseppe Argenziano, Anna Maria Cesinaro, Caterina Longo
BACKGROUND: Among skin neoplasms, solitary pink tumors represent challenging lesions in clinical practice since they can mimic melanocytic and nonmelanocytic lesions or even inflammatory ones. OBJECTIVE: In this case series we described dermoscopic and confocal features of 2 couples of similar lesions in order to achieve the correct diagnosis and the best therapeutic approach. METHODS: During clinical routine practice, 2 couples of clinically and dermoscopically similar lesions were examined by means of confocal microscopy...
June 29, 2017: Dermatology: International Journal for Clinical and Investigative Dermatology
https://www.readbyqxmd.com/read/28654937/handheld-in-vivo-reflectance-confocal-microscopy-for-the-diagnosis-of-eyelid-margin-and-conjunctival-tumors
#13
Elisa Cinotti, Aurélie Singer, Bruno Labeille, Damien Grivet, Pietro Rubegni, Catherine Douchet, Frédéric Cambazard, Gilles Thuret, Philippe Gain, Jean Luc Perrot
Importance: The clinical diagnosis of conjunctival and eyelid margin tumors is challenging, and new noninvasive imaging techniques could be valuable in this field. Objective: To assess the diagnostic accuracy of handheld in vivo reflectance confocal microscopy (IVCM) for the diagnosis of eyelid margin and conjunctival tumors. Design: A prospective observational study was conducted at University Hospital of Saint-Etienne from January 2, 2011, to December 31, 2016 (inclusion of patients until December 31, 2015, and follow-up until December 31, 2016)...
June 22, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28648937/the-correlation-of-the-standard-5-probe-fish-assay-with-melanocytic-tumors-of-uncertain-malignant-potential
#14
Aaron Muhlbauer, Shabnam Momtahen, Martin C Mihm, James Wang, Cynthia M Magro
BACKGROUND: FISH has recently emerged as a technique to better assess the malignant potential of histologically ambiguous melanocytic lesions. However, the usefulness of FISH has not been conclusively established. The purpose of this study was to further explore the diagnostic value of FISH in distinguishing the borderline melanocytic tumor (BMT) from melanoma. METHOD: 73 cases with BMT were analyzed retrospectively from a dermatopathology database between 2010-2015...
June 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28626949/diagnosis-and-treatment-of-concurrent-dermal-malignant-melanoma-and-melanocytomas-in-a-pygmy-hippopotamus-choeropsis-liberiensis
#15
Richard A Saunders, Rowena S Killick, Michelle G Barrows, Kelly A Bowlt, Daniella Denk
BACKGROUND: Dermal melanocytic neoplasms are common in some even-toed ungulates (Artiodactyla), yet this entity has not been reported in the pygmy hippopotamus to date. Concurrent occurrence of multiple benign and malignant melanocytic neoplasms is unusual. Malignant transformation occurs in a small percentage of benign melanocytic tumours in people but this phenomenon has not been well documented in animals. OBJECTIVES: To report the diagnosis and treatment of concurrent dermal melanocytomas and malignant melanomas in a pygmy hippopotamus...
June 18, 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28622423/-congenital-dermatofibrosarcoma-protuberans-clinically-mimicking-a-melanocytic-nevus-treated-with-serial-excisions
#16
J Laske, M Sergon, T Mentzel, S Beissert, J Maschke
A 9-year-old female patient was referred to our department with the clinical diagnosis of a congenital melanocytic nevus on the back for serial excisions. The child's parents confirmed that the lesion existed since birth. Only little changes in color and size were observed over the years. The lesion was painless. This article is protected by copyright. All rights reserved.
June 16, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28614272/quantification-of-microrna-21-and-microrna-125b-in-melanoma-tissue
#17
Anne Wandler, Rikke Riber-Hansen, Henrik Hager, Stephen J Hamilton-Dutoit, Henrik Schmidt, Boye S Nielsen, Magnus Stougaard, Torben Steiniche
Although microRNAs (miRNAs) have emerged as potent mediators of melanoma development and progression, a precise understanding of their oncogenic role remains unclear. In this study, we analysed formalin-fixed and paraffin-embedded tissues from two separate melanoma cohorts and from a series of benign melanocytic nevi. Using three different quantification methods [array analysis, quantitative PCR (qPCR) and in-situ hybridization (ISH) quantified by digital image analysis], we found considerable miRNA dysregulation in tumours...
June 13, 2017: Melanoma Research
https://www.readbyqxmd.com/read/28612620/sampus-meltump-and-thimump-diagnostic-categories-characterized-by-uncertain-biological-behavior
#18
L Roncati, F Piscioli, T Pusiol
In the dermatopathological practice, there is a group of atypical melanocytic lesions with borderline histological features between benign simulants and malignant melanoma (MM), due to conflicting diagnostic criteria and inter-observer disagreement. In these cases, the dermatopathologist is authorized to seek consult with an established expert in the field, but even the most experienced specialist may not be sure about the correct diagnosis and the subsequent biological behavior. There is general consensus among qualified dermatopathologists that can be helpful to insert these ambiguous cases into two diagnostic categories: SAMPUS (Superficial Atypical Melanocytic Proliferations of Unknown Significance) and MELTUMP (MELanocytic Tumors of Uncertain Malignant Potential)...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/28607685/concurrent-braf-and-pten-mutations-in-melanoma-of-unknown-origin-presenting-as-a-breast-mass
#19
Emmanuel Agosto-Arroyo, Marilin Rosa, Alec Chau, Laila Khazai
BACKGROUND: Metastases represent a small percentage of the malignancies affecting the breast, and only 5% of melanomas originate from non-cutaneous sites. Multiple genetic aberrations have been associated with the development of melanocytic lesions, including BRAF V600E mutation. Mutations in PTEN gene have also been related to the pathogenesis of multiple malignancies. PURPOSE/METHOD: This is the case of a 28-year-old female who presented with a tender, palpable mass in the upper outer quadrant of the right breast...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28607006/nr4a2-promotes-dna-double-strand-break-repair-upon-exposure-to-uvr
#20
Kelvin Yin, Yash Chhabra, Romain Tropée, Yi Chieh Lim, Mitchell Fane, Eloise Dray, Richard Sturm, Aaron G Smith
Exposure of melanocytes to ultraviolet radiation (UVR) induces the formation of UV-lesions that can produce deleterious effects in genomic DNA. Encounters of replication forks with unrepaired UV-lesions can lead to several complex phenomena, such as the formation of DNA double strand breaks (DSBs). The NR4A family of nuclear receptors are transcription factors that have been associated with mediating DNA repair functions downstream of the MC1R signalling pathway in melanocytes. In particular, emerging evidence shows that upon DNA damage, the NR4A2 receptor can translocate to sites of UV-lesion by mechanisms requiring post-translational modifications within the N-terminal domain and at a serine residue in the DNA biding domain at position 337...
June 12, 2017: Molecular Cancer Research: MCR
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