Acanthosis nigricans independently predicts hepatic fibrosis in people with type 2 diabetes in North India.

BACKGROUND: Acanthosis nigricans (AN) is a skin condition characterized by hyperpigmentation and thickening, often found in individuals with insulin resistance. Despite this well-established association, the potential link between AN and hepatic fibrosis in people with type 2 diabetes (T2D) has yet to be thoroughly explored. METHODOLOGY: We recruited a total of 300 people with T2D, half of whom had AN (n, 150), and the other half without AN (n, 150). We evaluated body composition, biochemistry, and hepatic fat analysis (using the controlled attenuation parameter, CAP), as well as assessments of hepatic stiffness (using the kilopascal, kPa) using Fibroscan. We used multivariable regression analysis to find independent predictors of AN and their relationship to hepatic fibrosis. Furthermore, we developed a prediction equation and AUC for hepatic fibrosis. RESULTS: Upon comparison between AN vs. NAN group, following were significatly higher; weight, BMI, hepatic transaminases, liver span, CAP, and kPa. After adjusting for age, weight, body mass index, diabetes duration, and specific anti-hyperglycaemic drugs (gliclazide, DPP-4 inhibitors, pioglitazone, and Glucagon-like peptide-1 receptor agonists), adjusted OR for AN were, liver span, 1.78 (95% CI: 0.91-3.49, p = 0.09), CAP, 7.55 (95% CI: 0.93-61.1, p = 0.05), and kPa, 2.47 (95% CI: 1.50-4.06, p = 0.001). A ROC analysis of predictive score for hepatic fibrosis showed optimal sensitivity and specificity at a score cut-off of 25.2 (sensitivity 62%, specificity 63%), with an AUC of 0.6452 (95% CI: 0.61235-0.76420). CONCLUSION: Acanthosis nigricans has the potential to be used as an easy-to-identify clinical marker for risk of hepatic fat and fibrosis in Asian Indians with T2D, allowing for early detection and management strategies.

Clinical factors associated with remission of obese acanthosis nigricans after laparoscopic sleeve gastrectomy: a prospective cohort study.

BACKGROUND: Acanthosis nigricans (AN) involves skin hyperpigmentation in body folds and creases. Obesity-associated AN (OB_AN) is the most common type of AN. The skin condition of obese patients with AN can be improved through bariatric surgery, such as laparoscopic sleeve gastrectomy (LSG), after weight loss. However, the contributing factors to the remission of AN after surgery are still not fully determined. The authors aimed to assess the metabolic and pathological factors associated with remission of AN following LSG in obese individuals. METHODS: The study included 319 obese patients who underwent LSG at our hospital. The subjects were divided into obesity (OB) only (OB, n =178) or OB with AN (OB_AN, n =141) groups. The basic clinical and metabolic indices and the dermatological features via reflectance confocal microscopy and histology were collected from patients prior to and after LSG. RESULTS: OB_AN patients had higher fasting plasma glucose, homeostatic model assessment for insulin resistance, and testosterone levels than OB patients. LSG could significantly improve the biochemical and histopathological features of OB_AN patients. The remissive rate of OB_AN patients was about 86.5% (122 out of 141) after surgery. The remission of OB_AN skin lesions was positively correlated with testosterone levels ( P <0.01). In addition, there was a significant positive correlation between changes in AN scores and epidermal thickness and skin pigmentation scores after surgery ( P <0.01). CONCLUSION: The remissive rate of OB_AN after LSG is associated with improved testosterone levels and reduced epidermal thickness and skin pigmentation levels.

Diet and Acanthosis Nigricans over a Two-Year Period in Children of the Pacific Region.

BACKGROUND: The impact that dietary carbohydrates have on children developing type 2 diabetes remains controversial. Furthermore, there are limited pediatric longitudinal studies on changes in body mass index (BMI) and diet related to the development of acanthosis nigricans (AN), a risk factor associated with type 2 diabetes. METHODS: Two 24 h dietary records were collected for 558 children, 2-8 years of age, at baseline and at a 2-year follow-up. Data on age, sex, BMI, and the presence of AN were also collected at each time point from the Children's Healthy Living Program. Logistic regression was used to determine factors associated with the presence of AN at follow-up. Multinominal regression was used to determine factors associated with changes in AN status. Linear regression was used to measure the associations between changes in dietary intake and in the Burke Score for AN. RESULTS: AN was present in 28 children at baseline and 34 children at follow-up. Adjusting for the presence of AN at baseline, age, sex, study group, baseline BMI, change in BMI z-score, time between assessments, and baseline intake, an increase from baseline for each teaspoon of sugar and serving of carbohydrate-rich food increased the risk for having AN at follow-up by 9% and 8%, respectively (p ≤ 0.05). An increased intake of added sugar (teaspoons) increased the risk of developing AN by 13% (p ≤ 0.01) and an increase in servings of foods rich in starch increased the risk of developing AN by 12% (p ≤ 0.01) compared to children who never had AN. Increasing the intake of fruit was also associated with decreased Burke Scores using multiple regression. However, the intake of energy and macronutrients were not associated with AN. CONCLUSIONS: Added sugar and foods rich in starch were independently associated with the occurrence of AN, suggesting the type of carbohydrates consumed is a factor in AN occurrence.

Dermatoses in overweight and obese children and their relationship with insulin and skin color.

BACKGROUND/AIM: The aim of the present study was to investigate the prevalence of obesity-related dermatoses in obese children, and the association between these dermatoses and insulin resistance as well as skin color. METHODS: Obese, overweight, and normal weight children according to body mass index who were followed up and treated in the outpatient clinics were included in the study. Dermatological examinations of the participants were performed, and fasting insulin and glucose levels were checked. RESULTS: The obese and overweight children were evaluated as the patient group (70 girls, 41 boys, mean age: 12.37 ± 3.14 years). One hundred one healthy children with normal weight were determined as the control group (59 girls, 42 boys, mean age: 12.15 ± 2.43). The first five common dermatoses in the patient group when compared with the control group were keratosis pilaris (KP), striae distensae, hyperhidrosis, acanthosis nigricans (AN), and plantar hyperkeratosis. The first five dermatoses which were positively correlated with formation and insulin resistance were KP, striae distensae, AN, hyperhidrosis, and plantar hyperkeratosis. According to the Fitzpatrick skin scale, we found that the darker the skin color, the higher the probability of AN and KP (OR, 0.298; 95% CI, 0.106-0.834, p = 0.021; OR, 0.306; 95% CI, 0.117-0.796, p = 0.015, respectively). CONCLUSION: Some dermatoses associated with obesity and insulin resistance were not found in obese children, or there was no significant association. These results indicate that many skin morbidities may be prevented by preventing and treating obesity and insulin resistance in the early period.

Assessment of serum chemerin levels in acanthosis nigricans: A case-control study.

BACKGROUND: Acanthosis nigricans (AN) is an asymptomatic skin condition linked to several underlying systemic conditions. Chemerin is an adipokine that increases during inflammatory disorders such as metabolic syndrome (MetS). AIMS: This case-control study investigates the link between AN and the underlying MetS and serum levels of chemerin in individuals with obesity. PATIENTS/METHODS: Twenty-five adults with AN and obesity (body mass index [BMI] > 30 kg/m2 ), 25 adults with obesity but no AN, and 25 healthy controls (BMI < 30 kg/m2 ) had their lipid profiles and serum chemerin concentrations examined. RESULTS: The neck (80.0%) and axilla (68.0%) were the most common sites of AN. In participants with obesity, either alone or with AN, serum chemerin concentrations were significantly higher than in the control group (p < 0.001). Participants with obesity and AN had significantly higher levels of cholesterol, triglycerides (TG), low-density lipoprotein cholesterol (LDL-c), and serum chemerin levels (p < 0.001), and significantly lower high-density lipoprotein cholesterol (HDL-c) levels (p < 0.001) when compared to participants with obesity alone. All participants with obesity and AN (100%) and 88% of those with obesity alone had MetS. Logistic regression revealed that systolic blood pressure >130 mmHg, diastolic blood pressure >85 mmHg, waist circumference >90 cm, TG >150 mg/dl, HDL-c <45 mg/dl, fasting blood glucose >100 mg/dl, and serum chemerin >300 ng/ml were significant (p < 0.05) risk factors for AN. CONCLUSIONS: Acanthosis nigricans is a non-invasive and reliable sign of the underlying MetS and increased serum chemerin levels among individuals with obesity.

An African American Male Patient with Rare Type B Insulin Resistance Syndrome.

Syndromes of severe insulin resistance can result from mutations in the insulin receptor gene or autoantibodies to the insulin receptor. The type B syndrome of insulin resistance results from autoantibodies to the insulin receptor and occurs predominantly in women under age 50 years. Here we report on a 64 year old African American man with systemic lupus erythematosus (SLE) and acanthosis nigricans who had severe insulin resistance requiring up to 5000 units of insulin per day. He was diagnosed with type B insulin resistance syndrome based on his clinical presentation and demonstration of autoantibodies to the insulin receptor in his serum. This case study underscores the importance of assaying for autoantibodies to the insulin receptors especially in African American patients with severe insulin resistance and diabetes requiring excessive doses of insulin, in the setting of an autoimmune disease like SLE. It also behooves reference laboratories to develop and offer this assay because these patients have a very high mortality.

Malignant acanthosis nigricans and diseases with extensive oral papillary hyperplasia.

Oral papillary lesions represent a variety of developmental and neoplastic conditions. Early diagnoses of different papillary lesions are challenging for oral medicine specialists. Malignant acanthosis nigricans (MAN) is a rare cutaneous disorder and a potential marker of underlying hidden tumours. It is characterized by papillary lesions that always involve the oral mucosa. In oral medicine specialities, MAN is not well understood. When the early signs of MAN are extensive oral lesions and slight cutaneous pigmentation without obvious florid cutaneous papillomatosis, the diagnosis can be incorrect or delayed. Oral medicine specialists should ask affected patients to provide details of their medical history and conduct a timely systemic examination.

Acanthosis Nigricans: An Updated Review.

BACKGROUND: Early recognition of acanthosis nigricans is important because acanthosis nigricans can be a cutaneous manifestation of a variety of systemic disorders and, rarely, as a sign of internal malignancy. OBJECTIVE: The purpose of this article is to familiarize pediatricians with the clinical manifestations, evaluation, diagnosis, and management of acanthosis nigricans. METHODS: A search was conducted in November 2021in PubMed Clinical Queries using the key term "acanthosis nigricans". The search strategy included all clinical trials, observational studies, and reviews published within the past 10 years. Only papers published in the English literature were included in this review. The information retrieved from the above search was used in the compilation of the present article. RESULTS: Acanthosis nigricans is characterized by symmetric, hyperpigmented, and velvety plaques with ill-defined borders, typically involving intertriginous areas. Obesity is the most common cause of acanthosis nigricans which is increasingly observed in obese children and adolescents and can serve as a cutaneous marker of insulin resistance. Early recognition of acanthosis nigricans is important because acanthosis nigricans can also be a cutaneous manifestation of a variety of systemic disorders and, rarely, as a sign of internal malignancy. This may consist of weight reduction, discontinuation of causative drugs, treatment of underlying endocrinopathy, or treatment of an underlying malignancy. For patients with isolated acanthosis nigricans and for those whose underlying cause is not amenable to treatment, treatment of the lesion may be considered for cosmetic reasons. Topical retinoids, vitamin D analogs, chemical peels, and other keratolytics are often used for the treatment of localized lesions. Seldom, systemic therapy such as oral retinoids may be considered for extensive or generalized acanthosis nigricans and acanthosis nigricans unresponsive to topical therapy. Other uncommon treatment modalities include dermabrasion, laser therapy, and surgical removal. CONCLUSION: Although acanthosis nigricans is treatable, a complete cure is difficult to achieve. The underlying cause should be treated, if possible, to resolve and prevent the recurrence of acanthosis nigricans. The diagnosis is mainly clinical, based on the characteristic appearance (symmetrically distributed, hyperpigmented, velvety, papillomatous, hyperkeratotic plaques with ill-defined borders) and the typical sites (intertriginous areas, flexural area, and skin folds) of the lesions. The diagnosis might be difficult for lesions that have atypical morphology or are in an unusual location. Clinicians should be familiar with the clinical signs, evaluation, diagnosis, and therapy of acanthosis nigricans because of the link between it and underlying diseases.

[Acanthosis nigricans over the face revealing primitive bronchial adenocarcinoma: about a case]. / Acanthosis nigricans du visage révélant un adénocarcinome bronchique primitif: à propos d'un cas.

We here report a case of bronchial cancer revealed by acanthosis nigrigans affecting the face. This rare mode of revelation may precede diagnosis of underlying neoplasia by several months . This study highlights the importance of suspecting primary lung cancer in patients with acanthosis nigrigans.

Paraneoplastic Dermatoses in Breast Cancer: Malignant Acanthosis Nigricans with Tripe Palm.

Our patient was a 43-year-old, single black woman, born and living in Paracambi, State of Rio de Janeiro, who worked as a surgical instrumentalist. She was sent to our sector of dermatology due to hypochromia and diffuse skin roughness that had first appeared 8 years previously. She had been diagnosed 6 months before admission with ductal infiltrating metastatic carcinoma in the right breast, with therapeutic failure of chemotherapy and radiotherapy. Her menarche had occurred at age 13 years, she reported normal menstrual cycles from there on, and she had never been pregnant. She denied neoplasias and other comorbidities in her family history.

Cutaneous Manifestations of Diabetes.

Diabetes mellitus is a significant worldwide health concern and cutaneous manifestations are common. This review describes characteristic skin findings of diabetes, general skin findings related to diabetes, and findings related to diabetes treatment with a focus on clinical presentation, diagnosis, pathophysiology, epidemiology, and treatment. As the prevalence of diabetes continues to rise, cutaneous manifestations of diabetes mellitus likely will be encountered more frequently by physicians in all disciplines including dermatologists and primary care physicians. Accordingly, knowledge regarding the prevention, diagnosis, and management of cutaneous manifestations is an important aspect in the care of patients with diabetes.

Tripe palms and Malignant Acanthosis Nigricans: More than a diagnostic pointer.

BACKGROUND: Tripe palms (TP) is one of the rare cutaneous paraneoplastic manifestations of various intra-abdominal malignancies. TP and malignant acanthosis nigricans (MAN) occur together and may precede even years before the index cancer. Though rare, the clinical significance of TP and MAN holds significance as an indicator of internal malignancy. CASE: Here, we describe 71-year, postmenopausal female with ovarian cancer who presented to us with a history of dyspepsia, abdominal distension, and weight loss. On detailed history and evaluation, it was found that she had TP and MAN 4 years before diagnosis. CONCLUSION: The unique presentation preceding the primary illness necessitates extensive early work-up to look for malignancy and the initial consideration for surgery due to the tumor biology in such patients.

Acanthosis nigricans: A review.

BACKGROUND: Acanthosis nigricans (AN) is a cutaneous disorder characterized by symmetric velvety hyperpigmented plaques on intertriginous areas like axilla, neck, inframammary, and groin. AIMS: To summarize the pathophysiology and classification of AN, provide an update of diagnostic testing strategies, and describe the current therapeutic options described so far in the literature for this disease. METHODS: A comprehensive english language literature search across multiple databases (PubMed, EMBASE, MEDLINE, and Cochrane) for keywords (alone and in combination) was performed. MeSH as well as non-MeSH terms such as "acanthosis nigricans," "classification," "pathophysiology," "diagnosis," "treatment," "topical drugs," "systemic drugs," "chemical peeling," and "lasers" were taken into consideration. RESULTS: The pathophysiology of AN revolves around a multifactorial stimulation of proliferation of epidermal keratinocytes and dermal fibroblasts. Various types of AN include benign, obesity-associated, syndromic, malignant, acral, unilateral, medication-induced, and mixed-type. Homeostasis model assessment-insulin resistance (HOMA-IR) is a good tool for assessment of insulin resistance. Management involves general measures (weight reduction and addressing the underlying cause, if any), topical drugs (retinoids, vitamin D analogs, and keratolytics), oral drugs (retinoids and insulin sensitizers), chemical peels (trichloroacetic acid), and lasers (Long pulsed alexandrite, fractional 1550-nm erbium fiber, and CO2 ). CONCLUSION: Acanthosis nigricans is a treatable condition; however, complete cure and disappearance of lesions are difficult to achieve. Weight reduction is the most scientific and practical management strategy. Long-term studies and further research is warranted in the pathophysiology and treatment of this common condition.