scholarly journals XXX. Acute Infections into the Sebaceous Glands and Hair Follicles of the Nasal Vestibule

1922 ◽  
Vol 31 (2) ◽  
pp. 489-492
Author(s):  
Lee M. Hurd
Keyword(s):  
Hair Follicles ◽  
Sebaceous Glands ◽  
Nasal Vestibule ◽  
Acute Infections

scholarly journals Eccrine Hidradenoma of the Nasal Vestibule: A Rare Clinical Entity

2021 ◽  
pp. 014556132199501
Author(s):  
Yong-Il Cheon ◽  
Sung-Dong Kim ◽  
Kyung-Un Choi ◽  
Kyu-Sup Cho
Keyword(s):  
Benign Tumor ◽  
Clinical Presentation ◽  
Normal Skin ◽  
Hair Follicles ◽  
Sweat Glands ◽  
Sebaceous Glands ◽  
Nasal Vestibule ◽  
Rare Benign Tumor ◽  
Anterior Trunk ◽  
Transnasal Endoscopic Approach

Eccrine hidradenoma is a relatively rare benign tumor of sweat gland origin but with possible malignant transformation. It usually consists of solitary, well-demarcated papules or nodules covered with normal skin. Common sites of involvement are the scalp, face, limbs, and anterior trunk. Although the lining of the nasal vestibule includes hair follicles, sebaceous glands, and sweat glands, an eccrine hidradenoma originating in the nasal vestibule has yet to be reported. Herein, we describe a rare clinical presentation of nasal eccrine hidradenoma, treated successfully using a transnasal endoscopic approach.

scholarly journals Structural changes in hair follicles and sebaceous glands of hairless mice following exposure to sulfur mustard

2014 ◽  
Vol 96 (3) ◽  
pp. 316-327 ◽  
Author(s):  
Laurie B. Joseph ◽  
Diane E. Heck ◽  
Jessica A. Cervelli ◽  
Gabriella M. Composto ◽  
Michael C. Babin ◽  
...  
Keyword(s):  
Structural Changes ◽  
Sulfur Mustard ◽  
Hair Follicles ◽  
Sebaceous Glands ◽  
Hairless Mice

scholarly journals Hair Follicle Nevus with Sebaceous Hyperplasia: A Dermoscopic Observation

2015 ◽  
Vol 7 (3) ◽  
pp. 358-362 ◽  
Author(s):  
Kazutoshi Harada ◽  
Yuichiro Kato ◽  
Yukihiko Kato ◽  
Ryoji Tsuboi
Keyword(s):  
Hair Follicle ◽  
Hair Follicles ◽  
Pathological Findings ◽  
Sebaceous Glands ◽  
The Face ◽  
Diagnostic Usefulness ◽  
Well Differentiated ◽  
Histopathological Investigation

We herein report a case of hair follicle nevus, a rare hamartoma found on the face and showing follicular differentiation, which was associated with sebaceous hyperplasia. Dermoscopy of the lesion showed yellow globules surrounded by crown vessels/telangiectasias and scattered tiny hairs. Histopathological investigation revealed hyperplasia of the sebaceous glands and proliferation of well-differentiated vellus hair follicles. These pathological findings were thought to correspond to the yellowish globules and tiny hairs observed under dermoscopy. Hair follicle nevus associated with sebaceous hyperplasia is extremely rare; however, dermoscopic examination can suggest an appropriate diagnosis. The present case proved the diagnostic usefulness of dermoscopy for cutaneous tumors with hair follicular and sebaceous glandular differentiation.

HOW WIGS AND WOMEN’S BEAUTY SUPPLY PRODUCTS MOVE THROUGHOUT THE SUPPLY CHAIN

2018 ◽  
Vol 3 (10) ◽  
Author(s):  
Alexa Green ◽  
Felicia Jefferson
Keyword(s):  
Supply Chain ◽  
Epithelial Cells ◽  
Literature Review ◽  
Hair Loss ◽  
Outer Layer ◽  
Hair Growth ◽  
Review Paper ◽  
Hair Follicles ◽  
Key Factors ◽  
Sebaceous Glands

Everyone wants shine, softness, and hair strength, all key factors in having healthy hair. The purpose of this literature review is to provide information about healthy hair growth. Research states that the hair grows from follicles within the skin. Hair follicles are sacs where hair grows and where the sebaceous glands open. The follicles lined by cells derived from the epidermal. Keratin protects epithelial cells from damage and it makes up the outer layer of human skin. Even though there are many ways you can grow your hair, there are many ways you can lose your hair as well. This review paper also explains disorders that can cause hair loss.

scholarly journals Role of Androgen on Physiological Function of Pilosebaceous Unit

2021 ◽  
Vol 5 (3) ◽  
pp. 573-579
Author(s):  
Inda Astri Aryani ◽  
Cayadi Sidarta Antonius ◽  
Suroso Adi Nugroho ◽  
Nopriyati
Keyword(s):  
Hair Growth ◽  
Androgen Receptors ◽  
Physiological Function ◽  
Steroid Hormone ◽  
Hair Follicles ◽  
Sebaceous Glands ◽  
Pilosebaceous Unit ◽  
Sebum Production ◽  
Dermal Papillae

The pilosebaceous unit is a sebaceous gland with hair follicles. One of the hormones that affects the pilosebaceous unit is androgen, a steroid hormone that plays an important role in the expression of the phenotype of men and women. Androgen consist of testosterone and dihydrotestosterone which are activated by androgen receptors. Androgen in the pilosebaceous unit affect sebum production and hair growth. Androgen receptors in the sebaceous glands are found on sebocytes and in hair follicles in the dermal papillae of hair follicles

scholarly journals Prevalence of Demodex spp. in students and employees of the Pomeranian Medical University in Szczecin*

2019 ◽  
Vol 65 (3) ◽  
Author(s):  
Katarzyna Dołęgowska
Keyword(s):  
Hair Follicle ◽  
Influencing Factor ◽  
Study Participant ◽  
Hair Follicles ◽  
Infestation Rate ◽  
Sebaceous Glands ◽  
Demodex Folliculorum ◽  
Demodex Brevis ◽  
Medical University ◽  
Demodex Infestation

Introduction: Demodex folliculorum and Demodex brevis are mites living in the hair follicles and sebaceous glands of humans, with infestation usually being asymptomatic. In the present study the prevalence and number of mites, together with influencing factors of Demodex infestation, were investigated in students and personnel of the Pomeranian Medical University in Szczecin in Poland (PUM). The prevalence of 2 Demodex species, Demodex folliculorum and Demodex brevis, was compared in epilated eyelashes and skin scrapings derived from healthy volunteers.Materials and methods: The study was conducted on 217 healthy volunteers – females and males. The study group consisted of 114 students and 103 employees of PUM. From each study participant, 2–3 eyelashes from each lid were epilated. From 99 volunteers, skin scrapings and/or secretions from sebaceous glands were also obtained. Demodicosis was diagnosed when Demodex eggs, larvae or adult mites were identified under microscopic examination.Results: The infestation rate of Demodex (in epilated eyelashes and skin) among the 217 volunteers was 21%. Prevalence of hair follicle mites among personnel and students were 28% and 14% respectively. The mean number of mites among the 217 patients was 2.52 ±2.48 (3.16 ±2.9 in PUM personnel and 1.46 ±0.83 in students). The infestation rate increased with age (p = 0.0005). Demodex folliculorum infested 78% (p = 0.005) of the participants and 87.5% of epilated eyelashes (p = 0.000001). Demodex brevis was more frequent on the skin (67%; p = 0.00001). Hair follicle mites were detected more often in epilated eyelashes originating from the lower lid (p = 0.000001). Moreover, a weak correlation between the presence of selected symptoms (blepharedema, conjunctivitis, burning and itching of eyelids) and Demodex infestation was observed. There was no statistically significant association between Demodex infestation and an influencing factor: work using a microscope (p = 0.92).

scholarly journals Morphological characteristics of the skin and hair of clinically healthy dogs and cats

2020 ◽  
pp. 80-84
Author(s):  
O. S. Snopenko ◽  
◽  
O. P. Timoshenko ◽  
A. Y. Ulyanitskaya ◽  
D. V. Kibkalo ◽  
...  
Keyword(s):  
Seasonal Changes ◽  
Morphological Characteristics ◽  
Punch Biopsy ◽  
Hair Follicles ◽  
Domestic Cat ◽  
Domestic Dogs ◽  
Skin Thickness ◽  
Sebaceous Glands ◽  
Histological Characteristics ◽  
Healthy Dogs

The article describes the histological characteristics of the skin of clinically healthy domestic dogs and cats, presents morphometric data on the thickness of the skin, layers of the epidermis, the area of the sebaceous glands and hair follicles; describes sexual and seasonal skin replacements in domestic dogs and cats, common in the east of Ukraine. The material for research is the skin of clinically healthy dogs and cats. Research method is histological. Punch-biopsy of skin fragments was performed in animals on the right from the middle of the lateral surface of the back. Fragments of skin after fixation in 10 % neutral formalin were examined by paraffin, followed by staining of slides with hematoxylin-eosin and by gelatin impregnation, staining with Sudan II, hematoxylin of Karachi. In horizontal and vertical skin sections, the following was investigated: the thickness of the epidermis, papillary and reticular layers, the length and width of the sweat and sebaceous glands, follicle of the hair, the location of hair bundles and the ratio of secondary follicles to primary ones. The histological characteristics of skin and derivatives in dogs and cats have been established. The information obtained from morphometric histostudies indicates significant fluctuations in the values in cats depending on the season; the difference in skin thickness in winter and summer reached 1407 μM and had the same parameters in females and males. The papillary and reticular layers of the dermis correlated with the total skin thickness as 53.9 and 60.3 % in winter and 45.4 and 38.7% in summer, respectively. Epidermal seasonal changes were less significant. The papillary layer of the skin of the domestic cat was more developed than the reticular layer, in contrast to the dogs. The area of the basal sebaceous glands in cats averaged 0.05 mm2 in summer and 0.013 mm2 in winter. In domestic dogs, skin thickness and hair density did not depend on seasonal changes, but on the sex of the animals; in females, the skin was on average 496 + 183 microns thick, and the density was not significantly higher than in males. The area of the sebaceous glands averaged 0,020 mm2 in dog, in cats 0.013 mm2 in summer and in winter – 0.05 mm2.

scholarly journals Demodex spp. (Acari: Demodicidae) infection in healthy young adults in Poland – occurrence and risk factors

2020 ◽  
Author(s):  
Ewa Dzika ◽  
Katarzyna Kubiak ◽  
Joanna Korycińska ◽  
Małgorzata Lepczyńska ◽  
Hanna Szymańska
Keyword(s):  
Young Adults ◽  
Skin Diseases ◽  
Normal Skin ◽  
Hair Follicles ◽  
Skin Type ◽  
Sebaceous Glands ◽  
Skin Symptom ◽  
Eyelid Skin ◽  
The Face ◽  
Demodex Mites

Introduction: Demodex mites are associated with various symptoms pertaining to facial and eyelid skin in humans. Demodicosis is often reported in elderly people, above 50 years of age. In young adults, the Demodex spp. infection is less common and is asymptomatic or the symptoms are mild. Aim: The aim was to evaluate the occurrence of Demodex spp. in healthy young adults in Poland and analyze the associations between the presence of mites, participants gender and skin type, with regards to hygienic practices and symptoms. Material and methods: The content of facial sebaceous glands and eyelash follicles was examined in a group of 94 people, aged 18–32 years. Metric data and information about face and eyelid skin symptom occurrence, skin type and hygienic practices were collected by diagnostic survey. Results and discussion: Demodex spp. was identified in 21.3% of subjects. In 45% and 30% of carriers Demodex folliculorum and Demodex brevis occurred, respectively. A mixed infestation in 25% of subjects was detected. Demodex infestation was slightly higher in people with oily and mixed skin (23.5%), compared to those with dry and normal skin (18.6%). No significant influence of shared hygienic accessories on the level of Demodex spp. infection were observed. The skin symptoms of the face and eyelids were reported at 75% for subjects positive for Demodex. Conclusions: Demodex mites are often prevalent in healthy young adults in Poland in both the sebaceous glands of the face and hair follicles. While diagnosing face and eyelid skin diseases in young people, Demodex spp. infection should be considered.

scholarly journals Needle-nerve interaction in acupuncture: A morphological study.

2021 ◽  
Vol 24 (3) ◽  
pp. 324-333
Author(s):  
N. D. Dimitrov ◽  
D. Y. Atanasova ◽  
N. S. Tomov ◽  
N. L. Pirovsky ◽  
I. G. Ivanova ◽  
...  
Keyword(s):  
Mast Cells ◽  
Muscle Spindles ◽  
Systemic Effect ◽  
Hair Follicles ◽  
Nerve Endings ◽  
Sebaceous Glands ◽  
Nerve Fibres ◽  
Free Nerve Endings ◽  
Needle Tract ◽  
Acupuncture Effects

Some acupuncture effects are considered to be caused by interaction with nerve structures in and around the acupoints. The aim of the present study was to investigate the nerve structures that interact with the needle in acupuncture and to present their distribution in acupoint tissues. To do this, the microscopic anatomy and its alterations in the vicinity of the needle tract formed after experimental acupuncture in ST36 acupoint in rats were described by histological and immunohistochemical methods. Free nerve endings were seen in the epidermis, and surrounding hair follicles and sebaceous glands in the dermis. Muscle spindles and larger nerve fibres close to blood vessels were also observed deeper, in the muscular plane. Needling of the acupoint caused destruction and displacement of hair follicles together with their free nerve endings. Deeper, some muscle spindles and smaller nerves were displaced and disrupted. Larger nerves were not destroyed, but rather pushed aside by the needle. Furthermore, needle impact also caused degranulation of mast cells near the needle tract. The findings suggest multiple ways of interaction between acupuncture needle and the nerve structures of the acupoint. Acupuncture combines destruction, disruption and displacement of nerve structures, together with additional interaction with mast cells. Those mechanisms are involved in eliciting the needling sensation and are possibly associated with the systemic effect of acupuncture.

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