34,740 results match your criteria Hair Anatomy


Confirmation of a Phenotypic Entity for Variants in Egyptian Ectodermal Dysplasia Patients and Role of Ethnicity.

Genes (Basel) 2022 Jun 13;13(6). Epub 2022 Jun 13.

Clinical Genetics Department, Human Genetics & Genome Research Division (HGGR), National Research Centre (NRC), Cairo 12622, Egypt.

Ectodermal dysplasia (ED) are hereditary disorders characterized by the disturbance of the ectodermal development of at least two of four ectodermal tissues: teeth, hair, nails and sweat glands. Clinical classification of ED is challenged by overlapping features, variable expressivity, and low number of patients, hindering full phenotypic spectrum identification. Disease-causing variants in elements of major developmental pathways, e. Read More

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Measuring collagen injury depth for burn severity determination using polarization sensitive optical coherence tomography.

Sci Rep 2022 Jun 21;12(1):10479. Epub 2022 Jun 21.

Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA.

Determining the optimal treatment course for a dermatologic burn wound requires knowledge of the wound's severity, as quantified by the depth of thermal damage. In current clinical practice, burn depth is inferred based exclusively on superficial visual assessment, a method which is subject to substantial error rates in the classification of partial thickness (second degree) burns. Here, we present methods for direct, quantitative determination of the depth extent of injury to the dermal collagen matrix using polarization-sensitive optical coherence tomography (PS-OCT). Read More

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Use of the O-Z Flap to Repair Scalp Defects After Cancer Tumor Resection.

J Craniofac Surg 2022 May 26;33(3):892-894. Epub 2021 Oct 26.

Ningbo City First Hospital, Ningbo, China.

Background: Large benign and malignant tumors in the scalp cannot be sutured directly after resection. Instead, skin grafting or skin flap repair is the most commonly used techniques. Local tissue depression and lack of hair growth are some of the drawbacks associated with these techniques. Read More

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Subcutaneous Lateral Temporal Lift.

Clin Plast Surg 2022 Jul 13;49(3):365-375. Epub 2022 May 13.

Northwell Health System/Hofstra University, Zucker School of Medicine, Manhattan Eye, Ear and Throat Hospital, 1009 Park Avenue, New York, NY 10028, USA. Electronic address:

Over the past decades, the understanding of the nuances of forehead anatomy and facial aging has grown immensely. Safe and reliable options for forehead rejuvenation followed. Although noninvasive techniques are an important adjunct in forehead rejuvenation, the mainstay of treatment of the eyebrow is operative intervention. Read More

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Brow Anatomy and Aesthetics of the Upper Face.

Clin Plast Surg 2022 Jul;49(3):339-348

Cleveland Clinic Department of Plastic Surgery, 9500 Eucllid Avenue, Cleveland Ohio 44195, USA.

The surgical approach to the brow has changed perhaps more than any other facial esthetic procedure in the past 20 years. Understanding the functional anatomy of the upper face is the best means of maximizing results and minimizing untoward events in this region. The surgical and clinical correlation is addressed in detail in this article. Read More

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Metabolomics Analysis Reveals Alterations in Cochlear Metabolic Profiling in Mice with Noise-Induced Hearing Loss.

Biomed Res Int 2022 6;2022:9548316. Epub 2022 May 6.

Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.

Noise-induced hearing loss (NIHL) has always been an important occupational hazard, but the exact etiopathogenesis underlying NIHL remains unclear. Herein, we aimed to find metabolic biomarkers involved in the development of NIHL based on a mouse model using a gas chromatography coupled with mass spectrometry (GC-MS) metabolomics technique. We showed that the auditory brainstem response (ABR) thresholds at the frequencies of 4, 8, 12, 16, 24, and 32 kHz were all significantly elevated in the noise-exposed mice. Read More

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Hair and Nail Conditions: Nail Conditions.

Authors:
Julie E Mervak

FP Essent 2022 Jun;517:27-34

Department of Dermatology - University of Michigan School of Medicine, 1910 Taubman Center 1500 E. Medical Center Drive, Ann Arbor, MI 48109-5314.

A thorough understanding of nail anatomy can help physicians identify the causes of nail conditions. Observation of changes to the nail can help establish a diagnosis. Patient evaluation should include a physical examination, dermoscopy, and, in some cases, nail biopsy. Read More

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Hair and Nail Conditions: Alopecia Evaluation.

Authors:
Sam Wu

FP Essent 2022 Jun;517:11-16

Department of Dermatology - University of North Carolina School of Medicine, 410 Market St Suite 400, Chapel Hill, NC 27516.

Alopecia affects men and women and can result in significant distress for patients. Alopecias can be categorized as nonscarring or scarring. Nonscarring alopecias include male and female pattern alopecias, alopecia areata, telogen effluvium, traction alopecia, trichotillomania, and tinea capitis. Read More

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Reversible Hair Loss in Lichen Planopilaris: Regrowth With Low-Dose Naltrexone and Platelet-Rich Plasma.

J Drugs Dermatol 2022 Jun;21(6):671-673

Lichen planopilaris (LPP) is a cicatricial alopecia that presents with patchy or diffuse hair loss at the vertex or parietal scalp. The literature has limited evidence on treatments for this challenging disease, with most reports involving small groups of patients with varied or suboptimal clinical responses. Amongst individuals who do respond to therapy and eventually achieve disease remission, hair regrowth within scarred alopecic patches is rare. Read More

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Synaptic transmission at the vestibular hair cells of amniotes.

Mol Cell Neurosci 2022 Jun 3;121:103749. Epub 2022 Jun 3.

Experimental Otology Group, InnerEarLab, Department of Otolaryngology, University Medical Center Göttingen, and Institute for Auditory Neuroscience, 37075 Göttingen, Germany; Auditory Neuroscience Group, Max Planck Institute for Multidisciplinary Sciences, 37075 Göttingen, Germany; Collaborative Research Center 889, University of Göttingen, Göttingen, Germany; Multiscale Bioimaging Cluster of Excellence (MBExC), University of Göttingen, 37075 Göttingen, Germany. Electronic address:

A harmonized interplay between the central nervous system and the five peripheral end organs is how the vestibular system helps organisms feel a sense of balance and motion in three-dimensional space. The receptor cells of this system, much like their cochlear equivalents, are the specialized hair cells. However, research over the years has shown that the vestibular end organs and hair cells evolved very differently from their cochlear counterparts. Read More

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Demonstrating Hairy and Glabrous Skin Innervation in a 3D Pattern using Multiple Fluorescent Staining and Tissue Clearing Approaches.

J Vis Exp 2022 05 20(183). Epub 2022 May 20.

Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences;

Skin innervation is an important part of the peripheral nervous system. Although the study of the cutaneous nerve fibers has progressed rapidly, most of the understanding of their distributional and chemical characteristics comes from conventional histochemical and immunohistochemical staining on thin tissue sections. With the development of the tissue clearing technique, it has become possible to view the cutaneous nerve fibers on thicker tissue sections. Read More

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Single-Cell RNA-seq Analysis Reveals Cellular Functional Heterogeneity in Dermis Between Fibrotic and Regenerative Wound Healing Fates.

Front Immunol 2022 17;13:875407. Epub 2022 May 17.

Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, Tokyo, Japan.

Background: Fibrotic scars are common in both human and mouse skin wounds. However, wound-induced hair neogenesis in the murine wounding models often results in regenerative repair response. Herein, we aimed to uncover cellular functional heterogeneity in dermis between fibrotic and regenerative wound healing fates. Read More

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Sirolimus Restores Erythropoiesis and Controls Immune Dysregulation in a Child With Cartilage-Hair Hypoplasia: A Case Report.

Front Immunol 2022 19;13:893000. Epub 2022 May 19.

Hematology Unit, Istituto di Ricerca e Cura a Carattere Scintifico (IRCCS) Istituto Giannina Gaslini, Genoa, Italy.

Cartilage-hair hypoplasia (CHH) is a syndromic immunodeficiency characterized by metaphyseal dysplasia, cancer predisposition, and varying degrees of anemia. It may present as severe combined immunodeficiency in infancy, or slowly progress until fully manifesting in late adolescence/adulthood. No targeted treatment is currently available, and patients are usually managed with supportive measures, or are offered a bone marrow transplant if the clinical phenotype is severe and a suitable donor is available. Read More

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Central Centrifugal Cicatricial Alopecia.

Cutis 2022 04;109(4):235-236

Family and Community Medicine Professor, Dermatology and Cutaneous Surgery University of Texas Health.

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LGR5 is a conserved marker of hair follicle stem cells in multiple species and is present early and throughout follicle morphogenesis.

Sci Rep 2022 Jun 1;12(1):9104. Epub 2022 Jun 1.

Molecular Biomedical Sciences, North Carolina State University College of Veterinary Medicine, Raleigh, NC, USA.

Hair follicle stem cells are key for driving growth and homeostasis of the hair follicle niche, have remarkable regenerative capacity throughout hair cycling, and display fate plasticity during cutaneous wound healing. Due to the need for a transgenic reporter, essentially all observations related to LGR5-expressing hair follicle stem cells have been generated using transgenic mice, which have significant differences in anatomy and physiology from the human. Using a transgenic pig model, a widely accepted model for human skin and human skin repair, we demonstrate that LGR5 is a marker of hair follicle stem cells across species in homeostasis and development. Read More

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Immune-mediated alopecias and their mechanobiological aspects.

Cells Dev 2022 Jun 29;170:203793. Epub 2022 May 29.

Wallace H. Coulter Department of Biomedical Engineering, USA; Bioengineering PhD Program, USA; Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, USA. Electronic address:

Alopecia is a non-specific term for hair loss clinically diagnosed by the hair loss pattern and histological analysis of patient scalp biopsies. The immune-mediated alopecia subtypes, including alopecia areata, lichen planopilaris, frontal fibrosing alopecia, and central centrifugal cicatricial alopecia, are common, significant forms of alopecia subtypes. For example, alopecia areata is the most common autoimmune disease with a lifetime incidence of approximately 2% of the world's population. Read More

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Cutaneous malignant melanoma incidence is strongly associated with European depigmented skin type regardless of ambient ultraviolet radiation levels: evidence from Worldwide population-based data.

AIMS Public Health 2022 17;9(2):378-402. Epub 2022 Mar 17.

Biological Anthropology and Comparative Anatomy Unit, Adelaide Medical School, the University of Adelaide, Adelaide, South Australia, Australia.

Current public health advice is that high ultraviolet radiation (UVR) exposure is the primary cause of Malignant Melanoma of skin (CMM), however, despite the use of sun-blocking products incidence of melanoma is increasing. To investigate the UVR influence on CMM incidence worldwide WHO, United Nations, World Bank databases and literature provided 182 country-specific melanoma incidence estimates, daily UVR levels, skin colour (EEL), socioeconomic status (GDP PPP), magnitude of reduced natural selection (Ibs), ageing, urbanization, percentage of European descendants (Eu%), and depigmentation (blonde hair colour), for parametric and non-parametric correlations, multivariate regressions and analyses of variance. Worldwide, UVR levels showed negative correlation with melanoma incidence ("rho" = -0. Read More

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Cronkhite-Canada Syndrome: A Case Report.

JNMA J Nepal Med Assoc 2022 May 5;60(249):473-477. Epub 2022 May 5.

Department of Public Health and Community Programs, Dhulikhel Hospital, Kathmandu University School of Medical Sciences, Dhulikhel, Kavre, Nepal.

Cronkhite-Canada Syndrome is a rare disease characterised by diffuse gastrointestinal polyposis, abdominal pain, diarrhoea, cutaneous and mucosal hyperpigmentation, alopecia, and onychodystrophy. Here we report a case of a 40-year-old female with Cronkhite-Canada Syndrome, who presented with the complaints of diffuse abdominal pain, blood mixed stools, and diarrhoea associated with tenesmus. She had nausea and reduced appetite and lost 10 kgs in 3 months. Read More

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Prominent Follicular Keratosis in Multiple Intestinal Atresia with Combined Immune Deficiency Caused by a TTC7A Homozygous Mutation.

Genes (Basel) 2022 May 4;13(5). Epub 2022 May 4.

Dermatology Unit, Bambino Gesù Children's Hospital, IRCCS, Piazza Sant'Onofrio 4, 00165 Rome, Italy.

Multiple intestinal atresia with combined immune deficiency (MIA-CID) is an autosomal recessive syndrome due to mutations in the TTC7A gene implicated in the polarization of intestinal and thymic epithelial cells. MIA-CID is lethal in the first year of life in the majority of patients. Dermatological manifestations have been reported in a few cases. Read More

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Critical roles of FGF, RA, and WNT signalling in the development of the human otic placode and subsequent lineages in a dish.

Regen Ther 2022 Jun 16;20:165-186. Epub 2022 May 16.

Department of Physiology, Keio University School of Medicine, 35 Shinanomachi Shinjuku-ku, Tokyo 160-8582, Japan.

Introduction: Efficient induction of the otic placode, the developmental origin of the inner ear from human pluripotent stem cells (hPSCs), provides a robust platform for otic development and sensorineural hearing loss modelling. Nevertheless, there remains a limited capacity of otic lineage specification from hPSCs by stepwise differentiation methods, since the critical factors for successful otic cell differentiation have not been thoroughly investigated. In this study, we developed a novel differentiation system involving the use of a three-dimensional (3D) floating culture with signalling factors for generating otic cell lineages via stepwise differentiation of hPSCs. Read More

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Rare case of multiple and perforating pilomatrixomas in a young girl with lymphovascular malformation reveals a potential new disease association.

BMJ Case Rep 2022 May 25;15(5). Epub 2022 May 25.

Department of Plastic Surgery, NHS Tayside, Dundee, UK.

This report details the case of a girl of primary school age who was referred to our plastic surgery department with an ulcerating lesion on the nape of her neck. A firm mass was palpable in the underlying subcutaneous tissue. This lesion was accompanied by two smaller firm nodules: one in the adjacent tissue and another in the left preauricular region. Read More

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Comparison of zinc levels in the various biosubstrates of patients with unstable atherosclerotic plaque.

Klin Lab Diagn 2022 May;67(5):271-276

Center for the development of professional qualifications of medical workers.

The article describes the content and comparative characteristics of zinc level in the hair, biopsies of carotid atherosclerotic plaques (AP) and serum in patients with carotid atherosclerosis. The highest concentration of zinc is found in hair compared to the AP and serum. Zinc levels is higher in AP than in the serum. Read More

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From Bench to Booth: Examining Hair-Cell Regeneration Through an Audiologist's Scope.

Authors:
Rebecca M Lewis

J Am Acad Audiol 2021 11 24;32(10):654-660. Epub 2022 May 24.

Whisper.ai, Department of Clinical Research, San Francisco, California.

Damage to auditory hair cells is a key feature of sensorineural hearing loss due to aging, noise exposure, or ototoxic drugs. Though hair-cell loss is permanent in humans, research in bird species led to the discovery that analogous hair cells of the avian basilar papilla are able to regenerate after being damaged by ototoxic agents. Regeneration appears to occur through a combination of the mitotic expansion of a precursor population of supporting cells and direct transdifferentiation of supporting cells into functioning hair cells. Read More

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November 2021

Effects of age and sex on some hematological and biochemical parameters in Hair goats.

Vet Res Forum 2022 Mar 15;13(1):15-19. Epub 2022 Mar 15.

Department of Anatomy, Faculty of Veterinary Medicine, Aksaray University, Aksaray, Turkiye.

This study was performed to determine the blood reference values of hematological and biochemical parameters in Hair goats at different ages. For this aim, clinically healthy Hair goats (n = 180, ages of six month and 1-3 years male and female) were used to collect blood samples. In whole blood, white blood cell (WBC), red blood cell (RBC), hemoglobin (HGB), hematocrit (HCT), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), mean corpuscular hemoglobin concentration (MCHC)and red cell distribution width (RDW) were evaluated. Read More

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Apoptotic extracellular vesicles are metabolized regulators nurturing the skin and hair.

Bioact Mater 2023 Jan 11;19:626-641. Epub 2022 May 11.

Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, South China Center of Craniofacial Stem Cell Research, Guangdong Provincial Key Laboratory of Stomatology, 510055, Guangzhou, China.

Over 300 billion of cells die every day in the human body, producing a large number of endogenous apoptotic extracellular vesicles (apoEVs). Also, allogenic stem cell transplantation, a commonly used therapeutic approach in current clinical practice, generates exogenous apoEVs. It is well known that phagocytic cells engulf and digest apoEVs to maintain the body's homeostasis. Read More

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January 2023

[Comparison of postoperative mid-term and long-term quality of life between Billroth-I gastroduodenostomy and Billroth-II gastrojejunostomy after radical distal gastrectomy in patients with gastric cancer: a cohort study based on a case registry database].

Zhonghua Wei Chang Wai Ke Za Zhi 2022 May;25(5):401-411

Department of Gastrointestinal Surgery and Gastric Cancer Laboratory, West China Hospital, Sichuan University, Chengdu 610041, China.

The pattern of digestive tract reconstruction in radical gastrectomy for gastric cancer is still inconclusive. This study aims to compare mid-term and long-term quality of life after radical gastrectomy for distal gastric cancer between Billroth-I (B-I) and Billroth-II (B-II) reconstruction. A retrospective cohort study was conducted. Read More

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Melanocortin-1 receptor mutations and pigmentation: Insights from large animals.

Prog Mol Biol Transl Sci 2022 25;189(1):179-213. Epub 2022 Mar 25.

Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, Auburn, AL, United States. Electronic address:

The melanocortin-1 receptor (MC1R) is a G protein-coupled receptor expressed in cutaneous and hair follicle melanocytes, and plays a central role in coat color determination in vertebrates. Numerous MC1R variants have been identified in diverse species. Some of these variants have been associated with specific hair and skin color phenotypes in humans as well as coat color in animals. Read More

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Genome-wide association meta-analysis identifies 48 risk variants and highlights the role of the stria vascularis in hearing loss.

Am J Hum Genet 2022 Jun 16;109(6):1077-1091. Epub 2022 May 16.

Institute for Molecular Medicine Finland (FIMM), University of Helsinki, 00014 Helsinki, Finland.

Hearing loss is one of the top contributors to years lived with disability and is a risk factor for dementia. Molecular evidence on the cellular origins of hearing loss in humans is growing. Here, we performed a genome-wide association meta-analysis of clinically diagnosed and self-reported hearing impairment on 723,266 individuals and identified 48 significant loci, 10 of which are novel. Read More

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UNC45A deficiency causes microvillus inclusion disease-like phenotype by impairing myosin VB-dependent apical trafficking.

J Clin Invest 2022 May;132(10)

Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.

Variants in the UNC45A cochaperone have been recently associated with a syndrome combining diarrhea, cholestasis, deafness, and bone fragility. Yet the mechanism underlying intestinal failure in UNC45A deficiency remains unclear. Here, biallelic variants in UNC45A were identified by next-generation sequencing in 6 patients with congenital diarrhea. Read More

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Efficacy Evaluation of Zoledronic Acid Combined with Chemotherapy in the Treatment of Lung Cancer Spinal Metastases on Computed Tomography Images on Intelligent Algorithms.

Comput Math Methods Med 2022 6;2022:6431852. Epub 2022 May 6.

Cancer Center, The First People's Hospital of Huaihua City, Huaihua, 418000 Hunan, China.

To analyze the effectiveness and safety of zoledronic acid combined with chemotherapy for lung cancer spinal metastases, 96 patients with lung cancer spinal metastases were averagely classified into the experimental group (gemcitabine, cisplatin, and zoledronic acid) and the control group (gemcitabine and cisplatin). An optimized noise variance estimation algorithm (OMAPB) was proposed based on the maximum a posteriori Bayesian method (MAPB), and the algorithm was applied to the patient's computed tomography (CT) scan. The results indicated that in terms of curative effect, the number of complete remission (CR), partial remission (PR) cases, effective rate, and clinical benefit rate of the test group was significantly higher than those of the control group. Read More

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