Publications by authors named "Amanda Nahhas"

Context: During the COVID-19 pandemic, dermatologists within the Beaumont Farmington Hills' Dermatology program noticed an increase in conditions associated with mask wearing, such as "maskne" (acne in a mask distribution, thought to be caused by mask wearing), as well as worsening of previously diagnosed dermatologic conditions.

Objectives: The goal of our study was to explore various factors that impacted mask-related skin changes and how these skin changes affected quality of life.

Methods: A cross-sectional study was performed.

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The role of topical antioxidants (AOs) on visible light plus ultraviolet A1 (VL+UVA1)-induced skin changes were evaluated. Twenty subjects with skin phototypes (SPTs) I-VI had placebo and concentrations of an AO blend applied to their back (AO 0.5%, 1.

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Excess amounts of skin surface oil can lead to adverse psychological consequences. Grease-spot photometry-based techniques measure sebum production rate. However, besides being tedious, these measurements are influenced by contact area, applied pressure, and time of application.

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Postinflammatory hyperpigmentation (PIH) occurs following cutaneous injury and is common following resolution of acne especially in patients with skin of color. The objective of this study was to further validate a trichloroacetic acid (TCA)-induced PIH model and compare it to acne-induced PIH using topical bakuchiol, a botanical extract that has been shown to have antimicrobial, anti-inflammatory, antioxidant, and antiacne properties. A prospective, non-randomized clinical trial was conducted on subjects with skin phototypes IV-VI with a history of acne-induced PIH.

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Breast cancer is the most common malignancy to metastasize to the skin in women. Cutaneous breast carcinoma may arise as cutaneous metastasis or secondary to direct tumor extension to the skin. This report describes an unusual presentation of cutaneous metastatic lobular breast carcinoma that involved diffuse cutaneous lesions and rapid progression from onset of breast mass to development of clinically apparent metastatic skin lesions.

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BACKGROUND: Visible light (VL) has multiple effects on the skin that currently available sunscreens do not protect against. Polypodium leucotomos extract (PLE) has properties that may offer protection against VL. OBJECTIVES: To determine the effectiveness of PLE in preventing VL-induced effects.

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Human skin is exposed to visible light (VL; 400-700 nm) and long-wavelength ultraviolet A1 (UVA1) radiation (370-400 nm) after the application of organic broad-spectrum sunscreens. The biologic effects of these wavelengths have been demonstrated; however, a dose-response has not been investigated. Ten subjects with Fitzpatrick skin phototype IV-VI were enrolled.

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Solar radiation is known to be a major contributor to the development of skin cancer. Most sunscreen formulations, including those with broad spectrum, offer minimal protection in long-wavelength ultraviolet A1 (UVA1; 370-400 nm) and visible light (VL; 400-700 nm) domain. There is limited information regarding the impact of this broad waveband (VL + UVA1, 370-700 nm) on those with light skin.

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Article Synopsis
  • Solar radiation, particularly from visible light (VL), contributes to skin cancer, and current sunscreens do not protect against VL.
  • Recent studies involved different light exposures to assess skin responses, revealing that visible light combined with some UVA1 resulted in darker, longer-lasting skin effects than pure visible light.
  • The research identified specific spectroscopic signatures for these skin responses, leading to a proposed method for evaluating protection against visible light.
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Vitiligo is an acquired, autoimmune disease characterized by depigmented macules and patches on the skin, which occur secondary to melanocyte destruction. Available therapeutic options are broadly divided into medical, surgical and phototherapy, though treatment of vitiligo can be challenging. Early diagnosis and management can maximize treatment efficacy.

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Afamelanotide, an α-melanocyte stimulating hormone analogue, has become an emerging therapeutic option for a variety of skin conditions previously refractory to other treatments. Its efficacy has been demonstrated in several dermatologic conditions, including erythropoietic protoporphyria (EPP), solar urticaria, polymorphic light eruption (PMLE), vitiligo, acne, and Hailey-Hailey disease. Its relatively low risk side effect profile makes it an attractive treatment option and also paves the way for innovative use in other disorders.

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Hidradenitis suppurativa, also known as acne inversa, is a chronic recurrent inflammatory disease of the skin making management challenging and continuously evolving. A large number of modalities exist aimed at quantifying the efficacy of treatment in studies on hidradenitis suppurativa. Both physician-reported and patient-reported outcomes are used as endpoints in these studies; however, the vast majority of the modalities used to survey these reported outcomes lack validation and congruence between studies.

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Drug-induced pigmentation accounts for up to 20% of all cases of acquired pigmentation. A thorough review of medical history and previous and ongoing medications as well as a complete skin examination can guide diagnosis. Implicated agents include alkylating/cytotoxic agents, analgesics, antiarrhythmics, anticoagulants, antiepileptics, antimalarials, antimicrobials, antiretrovirals, metals, prostaglandin analogs, and psychotropic agents, among others.

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Background/purpose: Screening antinuclear antibody (ANA) is not recommended prior to initiating narrowband ultraviolet B (NBUVB) phototherapy in vitiligo patients, unless concern for photosensitivity exists. Guidelines on prescribing NBUVB phototherapy in vitiligo patients with positive ANA are unavailable, prompting this study to uncover trends.

Methods: This retrospective chart review investigated patients 12 years of age or older with a diagnosis of vitiligo between January 2015 and September 2017, positive serum ANA, and NBUVB phototherapy.

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Oxidative stress is an integral element that influences a variety of biochemical reactions throughout the body and is known to play a notable role in melanogenesis. Exogenous triggers of oxidative stress, such as ultraviolet radiation (UVR) and visible light (VL), lead to pigment formation through somewhat different pathways, but both share a common endpoint-the potential to generate cosmetically undesirable hyperpigmentation. Though organic and inorganic sunscreens are available to protect against the UVR portion of the electromagnetic spectrum, coverage is lacking to protect against the VL spectrum.

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Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease that can have a considerable social and psychosocial impact in patients with skin of color. The lesions are difficult to treat and often present with notable frustration for both patients and physicians. Although current treatment ladders can delay procedures and surgical intervention, some believe that surgery should be introduced earlier in the management of HS.

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Photodermatoses occur in males and females of all races and ages. Onset can be variable in timing and influenced by genetic and environmental factors. Photodermatoses are broadly classified as immunologically mediated, chemical- and drug-induced, photoaggravated, and genetic (defective DNA repair or chromosomal instability) diseases.

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Background: A paucity of knowledge exists regarding the use of ertapenem in hidradenitis suppurativa. Our retrospective chart review and telephone interview aims to investigate the utility of intravenous ertapenem in severe, refractory hidradenitis suppurativa.

Methods: This retrospective chart review and telephone interview included patients with severe, refractory hidradenitis suppurativa treated with intravenous ertapenem between March 2013 and December 2016.

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Article Synopsis
  • - The sunless tanning industry is growing rapidly due to increased awareness about UV radiation risks and advancements in tanning products, particularly those containing Dihydroxyacetone (DHA), which is FDA-approved as a color additive.
  • - DHA is meant for external use only and instructions advise against contact with mucous membranes and eyes; consumers should be cautious about potential ingestion or inhalation, especially in spray-tan environments.
  • - Unlike sunscreen, which protects against UV radiation, sunless tanning products are classified as cosmetics and do not offer any UV protection, highlighting the need for further research on the safety of DHA.
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Background: Although recent hidradenitis suppurativa studies have shown that early-onset disease is associated with a positive family history and more widespread disease, research in pediatric hidradenitis suppurativa is limited.

Methods: Thirty-three children diagnosed with hidradenitis suppurativa during an 18-month period were included in this institutional review board-approved, retrospective chart review. Information on demographic characteristic, family history, and timing of onset (prepubescent vs postpubescent) was extracted.

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Vitiligo is a disorder characterized by the development of depigmented macules and patches secondary to melanocyte destruction. Several treatment options are available, including medical, light-based, and surgical therapies, that are often used in combination to achieve maximal repigmentation. Vitiligo surgery is an effective yet underperformed treatment, mainly because of lack of awareness and availability.

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Adequate treatment and follow-up of a patient with nonmelanoma skin cancer is of utmost concern for a clinician. However, there is a lack of international consensus on recommendations for surgical excision margins. Furthermore, lack of familiarity of the published guidelines leads to a variety in practice styles.

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Although the development of abnormal myocardial mechanics represents a key step during the transition from hypertension to overt heart failure (HF), the underlying ultrastructural and cellular basis of abnormal myocardial mechanics remains unclear. We therefore investigated how changes in transverse (T)-tubule organization and the resulting altered intracellular Ca(2+) cycling in large cell populations underlie the development of abnormal myocardial mechanics in a model of chronic hypertension. Hearts from spontaneously hypertensive rats (SHRs; n = 72) were studied at different ages and stages of hypertensive heart disease and early HF and were compared with age-matched control (Wistar-Kyoto) rats (n = 34).

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