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Genodermatosis

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https://www.readbyqxmd.com/read/29130490/sequence-variants-in-nine-different-genes-underlying-rare-skin-disorders-in-10-consanguineous-families
#1
Khadim Shah, Sabba Mehmood, Abid Jan, Izoduwa Abbe, Raja Hussain Ali, Anwar Khan, Muhammad S Chishti, Kwanghyuk Lee, Farooq Ahmad, Muhammad Ansar, Shaheen Shahzad, Deborah A Nickerson, Michael J Bamshad, Paul J Coucke, Regie L P Santos-Cortez, Richard A Spritz, Suzanne M Leal, Wasim Ahmad
BACKGROUND: Genodermatoses represent genetic anomalies of skin tissues including hair follicles, sebaceous glands, eccrine glands, nails, and teeth. Ten consanguineous families segregating various genodermatosis phenotypes were investigated in the present study. METHODS: Homozygosity mapping, exome, and Sanger sequencing were employed to search for the disease-causing variants in the 10 families. RESULTS: Exome sequencing identified seven homozygous sequence variants in different families, including: c...
December 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/29118470/diagnostic-utility-and-pitfalls-of-tzanck-smear-cytology-in-diagnosis-of-various-cutaneous-lesions
#2
Hemlata Panwar, Deepti Joshi, Garima Goel, Dinesh Asati, Kaushik Majumdar, Neelkamal Kapoor
Aims: Tzanck smear is an old but useful test for diagnosis of cutaneous dermatoses. The aim of this study was to highlight the potential usefulness and diagnostic pitfalls of Tzanck smear for diagnosis of cutaneous dermatoses and infections. Materials and Methods: This hospital based cross-sectional study was carried out on all Tzanck smears received for a period of twenty months (January 2014-August 2015). The smears were assessed to establish the utility of Tzanck smears in corroborating or excluding a diagnosis of immunobullous lesion or herpetic infection...
October 2017: Journal of Cytology
https://www.readbyqxmd.com/read/29080320/ultrastructure-of-acrokeratoelastoidosis
#3
J Lopes, H L de Almeida, R Rheingantz da Cunha Filho, B Viganó Lattman, L A Suíta de Castro
Acrokeratoelastoidosis (AKE) is a genodermatosis characterized by small, firm papules or plaques on the sides of the hands and feet (1) , it was first described in 1953 by Costa, in a Brazilian patient. It is a rare disease, both autosomal dominant and sporadic forms have been observed (2) . It is characterized by multiple hyperkeratotic papules on the palms, soles, and dorsum of the hands and feet. This article is protected by copyright. All rights reserved.
October 28, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29024216/acrochordons-on-the-neck-a-remarkable-clinical-feature-of-tuberous-sclerosis-showing-different-patterns
#4
C Baykal
Sachs and Lipsker(1) recently published a few patients diagnosed with tuberous sclerosis (TS) presenting with multiple loosely arranged acrochordons (molluscum pendulum) located on the posterior neck showing a lace-like distribution and they proposed the term "molluscum pendulum necklace sign" for these typically located lesions. They detected acrochordons in five cases (17%) in a retrospectively analysed consecutive series of 29 TS patients, of whom four (three adults and one child) remarkably showed this typical pattern...
October 12, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28979623/-piebaldisme-a-rare-genodermatosis
#5
Fatima Zahra Debbarh, Fatima Zahra Mernissi
Piebaldism is a rare autosomal dominant genodermatosis. It is due to congenital absence of melanocytes in the affected areas. We report a case. A 5 year old girl born to consanguineous parents and with similar cases in her mother's; she presented since birth achromic lesions on the legs with a steady evolution. clinical examination showed confluent achromic macules and poliosis (A) with no contrast enhancement under Wood lamp and several coffee-with-milk colored spots on the trunk and thighs(B). The diagnosis of piebaldism was made...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28964717/enpp1-mutation-causes-recessive-cole-disease-by-altering-melanogenesis
#6
Marwa Chourabi, Mei Shan Liew, Shawn Lim, Dorra H'mida-Ben Brahim, Lobna Boussofara, Liang Dai, Pui Mun Wong, Jia Nee Foo, Badreddine Sriha, Kim Samirah Robinson, Simon Denil, John Ea Common, Ons Mamaï, Youcef Ben Khalifa, Mathieu Bollen, Jianjun Liu, Mohamed Denguezli, Carine Bonnard, Ali Saad, Bruno Reversade
Cole disease is a genodermatosis of pigmentation following a strict dominant mode of inheritance. In this study we investigated eight patients affected with an overlapping genodermatosis following recessive inheritance. The patients presented with hypo- and hyper-pigmented macules over the body, resembling dyschromatosis universalis hereditaria in addition to punctuate palmoplantar keratosis. By homozygosity mapping and whole-exome sequencing, a biallelic p.Cys120Arg mutation in Ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) was identified in all patients...
September 27, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28944608/coexistence-of-mutations-in-keratin-10-krt10-and-the-mitochondrial-genome-in-a-patient-with-ichthyosis-with-confetti-and-leber-s-hereditary-optic-neuropathy
#7
Agnieszka Kalinska-Bienias, Agnieszka Pollak, Cezary Kowalewski, Urszula Lechowicz, Piotr Stawinski, Aleksandra Gergont, Joanna Kosinska, Ewa Pronicka, Pawel Kowalski, Katarzyna Wozniak, Rafal Ploski
Ichthyosis with confetti (IWC) is a severe congenital genodermatosis characterized by ichthyosiform erythroderma since birth and confetti-like spots of normal skin appearing in childhood as a results of revertant mosaicism. This disorder is caused by mutations in KRT10 or KRT1 genes. We report a 16-year-old boy who presented ichthyosiform erythroderma with severe desquamation since birth and gradually worsening psycho-neurological symptoms (mental retardation, ataxia, dystonia, hypoacusis). The patient conspicuously lacked typical confetti-like spots at the age of 16...
November 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28935411/-an-atypical-case-of-lipoid-proteinosis
#8
Xavier Grimaux, Rida El Ayoubi, Magalie Rabin, Ludovic Martin, Dominique Bonneau, Frédérique Bouyx, Emmanuelle Blanchard, Anne Croue, Quentin Breton
The lipoid proteinosis is a rare autosomic recessive genodermatosis characterized histologically by deposits of hyaline-like eosinophilic material of characteristic distribution. We herein report the case of a 56-year-old man admitted for progressive aggravated dementia associated with a late-onset dysphonia. Histologic examination of cutaneous and laryngeal biopsies showed deposits of an amorphous and eosinophilic material arranged around vessels, and adnexal structures, stained by PAS and congo red negative...
September 18, 2017: Annales de Pathologie
https://www.readbyqxmd.com/read/28932054/darier-disease-a-rare-genodermatosis
#9
Hema Suryawanshi, Akshay Dhobley, Aparna Sharma, Pramod Kumar
Darier disease (DD), also known as keratosis follicularis or dyskeratosis follicularis, is a rare autosomal dominant genodermatosis with high penetrance and variable expressivity. It is caused by mutations of ATP2A2 gene which encodes the sarco/endoplasmic reticulum Ca(2+) ATPase isoform 2. It is clinically manifested by hyperkeratotic papules primarily affecting seborrheic areas on the head, neck and thorax, with less frequent involvement of the oral mucosa. When oral manifestations are present, they primarily affect the palatal and alveolar mucosa, are usually asymptomatic and are discovered in routine dental examination...
May 2017: Journal of Oral and Maxillofacial Pathology: JOMFP
https://www.readbyqxmd.com/read/28918778/-monilethrix-is-a-hereditary-hair-shaft-disorder
#10
Andreas Ole Kirkegaard, Regina C Betz, Anette Bygum
Monilethrix is a rare genodermatosis with high penetrance and variable expressivity. This is a case report of a Danish family with varying phenotypical presentations. The family members were diagnosed using dermatoscopy and microscopy, which were subsequently supported by gene sequence analysis. No cure of monilethrix exists, but a single case report shows promising results using low dosage of oral minoxidil. Reducing hair dressing trauma to diminish weathering remains the best prophylaxis.
September 11, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28884927/peeling-skin-syndrome-associated-with-novel-variant-in-flg2-gene
#11
Ahmed Alfares, Sultan Al-Khenaizan, Fuad Al Mutairi
Peeling skin syndrome is a rare genodermatosis characterized by variably pruritic superficial generalized peeling of the skin with several genes involved until now little is known about the association between FLG2 and peeling skin syndrome. We describe multiple family members from a consanguineous Saudi family with peeling skin syndrome. Next Generation Sequencing identifies a cosegregating novel variant in FLG2 c.632C>G (p.Ser211*) as a likely etiology in this family. Here, we reported on the clinical manifestation of homozygous loss of function variant in FLG2 as a disease-causing gene for peeling skin syndrome and expand the dermatology findings...
December 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28869610/mutations-in-actrt1-and-its-enhancer-rna-elements-lead-to-aberrant-activation-of-hedgehog-signaling-in-inherited-and-sporadic-basal-cell-carcinomas
#12
Elodie Bal, Hyun-Sook Park, Zakia Belaid-Choucair, Hülya Kayserili, Magali Naville, Marine Madrange, Elena Chiticariu, Smail Hadj-Rabia, Nicolas Cagnard, Francois Kuonen, Daniel Bachmann, Marcel Huber, Cindy Le Gall, Francine Côté, Sylvain Hanein, Rasim Özgür Rosti, Ayca Dilruba Aslanger, Quinten Waisfisz, Christine Bodemer, Olivier Hermine, Fanny Morice-Picard, Bruno Labeille, Frédéric Caux, Juliette Mazereeuw-Hautier, Nicole Philip, Nicolas Levy, Alain Taieb, Marie-Françoise Avril, Denis J Headon, Gabor Gyapay, Thierry Magnaldo, Sylvie Fraitag, Hugues Roest Crollius, Pierre Vabres, Daniel Hohl, Arnold Munnich, Asma Smahi
Basal cell carcinoma (BCC), the most common human cancer, results from aberrant activation of the Hedgehog signaling pathway. Although most cases of BCC are sporadic, some forms are inherited, such as Bazex-Dupré-Christol syndrome (BDCS)-a cancer-prone genodermatosis with an X-linked, dominant inheritance pattern. We have identified mutations in the ACTRT1 gene, which encodes actin-related protein T1 (ARP-T1), in two of the six families with BDCS that were examined in this study. High-throughput sequencing in the four remaining families identified germline mutations in noncoding sequences surrounding ACTRT1...
October 2017: Nature Medicine
https://www.readbyqxmd.com/read/28859734/analysis-of-sebaceous-neoplasms-for-dna-mismatch-repair-proteins-in-muir-torre-syndrome
#13
Tess H Pollinger, Christopher R Kieliszak, Nicholas Logemann, Max L Gratrix
Muir-Torre syndrome is a rare genodermatosis inherited most frequently in an autosomal dominant fashion. Current criteria for its diagnosis include at least one sebaceous tumor and an underlying visceral malignancy. Muir-Torre syndrome is strongly associated with a germline mutation in DNA mismatch repair genes. We report two patients with a history of colorectal carcinoma who presented with sebaceous neoplasms on the face and trunk. Immunohistochemical staining of the sebaceous neoplasms demonstrated absence of mismatch repair proteins MSH2 and MSH6...
2017: Skinmed
https://www.readbyqxmd.com/read/28796338/benign-and-malignant-hybrid-adnexal-tumors-in-a-patient-with-epidermodysplasia-verruciformis
#14
Jonathan D Ho, Sarah A Kam, Ali Al-Haseni, Alina Markova, Debjani Sahni, Christina Lam, Lynne J Goldberg, Jag Bhawan
Epidermodysplasia verruciformis (EV) is a genodermatosis characterized by overgrowth of flat warts, pityriasis versicolor-like lesions and an increased propensity for developing cutaneous squamous cell carcinomas due to abnormal susceptibility to infection with beta-human papilloma viruses. Adnexal tumors are not typically associated with EV. Here we report a spectrum of hybrid adnexal tumors with divergent eccrine and folliculosebaceous differentiation, and cytologic features ranging from benign to frankly atypical, in a patient with inherited EV...
November 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28791733/incontinentia-pigmenti-in-a-male-xy-infant-with-long-term-follow-up-over-8-years
#15
Yasushi Matsuzaki, Akiko Rokunohe, Satoko Minakawa, Kazuo Nomura, Hajime Nakano, Etsuro Ito, Daisuke Sawamura
Incontinentia pigmenti (IP) is an X-linked genodermatosis affecting the skin and other sites, including the teeth, nails, hair, eyes and nervous system defects in female patients. Generally lethal in males, there are only a few known cases of males surviving this condition. Nuclear factor (NF)-κB essential modulator (NEMO), also known as inhibitor of kappa light polypeptide gene enhancer in B cells, kinase gamma (IKBKG), constitutes an essential activator of NF-κB. Over 80% of female patients with IP carry a common deletion mutation involving exons 4-10 of the IKBKG/NEMO gene...
August 9, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28749546/familial-progressive-hyperpigmentation-a-family-resurvey-and-ultrastructural-skin-investigation
#16
Tingmei Wang, Hongwen Li, Yingying Dong, Man Hu, Qiuyun She, Yunhua Deng
Familial progressive hyperpigmentation (FPH) is an autosomal dominant genodermatosis characterized by hyperpigmented patches that increase in size and number with age. Since its initial description in an African-American family in 1971, only a few cases of FPH have been documented. A three-generation family with FPH in central China has also been reported. Here, we resurveyed that Chinese FPH family for a few unusual features including delayed age of onset and noninvolvement of ocular and oral mucosae. Electron microscopic examination of skin from the proband of the family showed that there were more melanosomes in lesional keratinocytes than in perilesional keratinocytes...
November 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28695430/birt-hogg-dub%C3%A3-syndrome-a-review-of-dermatological-manifestations-and-other-symptoms
#17
REVIEW
Yun Tong, Jeremy A Schneider, Alvin B Coda, Tissa R Hata, Philip R Cohen
Birt-Hogg-Dubé syndrome (BHD) is an autosomal dominant genodermatosis with malignant potential characterized by cutaneous and extracutaneous stigmata. Aberrations in the folliculin (FLCN) gene, which is located on chromosome 17, have been discovered in individuals with this condition. Over 150 unique mutations have been identified in BHD. The skin lesions associated with this condition include fibrofolliculomas, trichodiscomas, perifollicular fibromas, and acrochordons. Extracutaneous features of the syndrome typically include the lung (spontaneous pneumothorax and cysts) and the kidney (neoplasms)...
July 10, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28686751/muckle-wells-syndrome-in-the-setting-of-basal-cell-nevus-syndrome
#18
Marie Wagener, Joseph W Laskas, Stephen Purcell, Tanya Ermolovich
Muckle-Wells syndrome (MWS) is a rare disorder inherited in an autosomal-dominant fashion that belongs to a group of hereditary periodic fever syndromes. It specifically belongs to the cryopyrin-associated periodic syndromes (CAPSs) in which there is a mutation in the NLRP3 (NLR family pyrin domain containing 3) gene that leads to overproduction of IL-1β, the source of the multisystem inflammatory symptoms. Muckle-Wells syndrome is characterized by a recurrent urticarial eruption that is associated with episodic fever, myalgia, arthralgia, malaise, progressive sensorineural hearing loss, and amyloid nephropathy (the most severe complication)...
June 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28685839/lipoid-proteinosis-a-case-with-distinct-histopathological-and-radiological-findings
#19
Balvinder Kaur Brar, Sarina Jain, Sukhmani Kaur Brar
Lipoid proteinosis is a rare inherited genodermatosis characterized by hyaline deposits in various tissues. Clinically, it manifests with cutaneous as well as extracutaneous features. Periodic acid-Schiff (PAS)-reactive hyaline deposits in the upper dermis, with localization around blood vessels and eccrine sweat glands, in particular, is the histopathological hallmark finding. On brain imaging, bilateral symmetrical temporal lobe calcifications are considered to be pathognomonic of this disorder. We report a case of lipoid proteinosis in which hyaline deposits were present in the papillary and reticular dermis, without being seen at the periphery of eccrine sweat glands, along with dystrophic calcification...
October 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28646613/novel-tmc8-splice-site-mutation-in-epidermodysplasia-verruciformis-and-review-of-hpv-infections-in-patients-with-the-disease
#20
E Imahorn, Z Yüksel, I Spoerri, G Gürel, C Imhof, Z N Saraçoğlu, A E Koku Aksu, P L Rady, S K Tyring, W Kempf, P H Itin, B Burger
BACKGROUND: Epidermodysplasia verruciformis (EV) is a genodermatosis leading to infections with cutaneous HPV, persistent plane warts and a high rate of non-melanoma skin cancer (NMSC). Biallelic loss-of-function mutations in TMC6 and TMC8 are known to be causative. OBJECTIVE: The aim of this study was to report EV-causing mutations in four patients with EV and to give an overview of all described patients with EV. PATIENTS AND METHODS: We investigated four patients with classical features of EV from two families...
October 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
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