Occupational dermatitis artefacta: a clinical case in a flight attendant.

Dermatitis artefacta is a psychosomatic disorder characterized by cutaneous lesions that are self-inflicted by the patient, apparently due to itchy sensation. Usually, the patient denies any direct involvement with this condition and is rarely conscious of the underlying psychosomatic etiology. Authors report a case of a flight assistant with hypertrophic scars, symmetrically located on both upper arms. She referred chronic itchy sensation localized at the site where lesions were present; she referred relief only through continuous and forceful scratching. Considering the clinical history and after excluding other dermatological disorders, the diagnosis of dermatitis artefacta was made.

Cross-elicitation responses to 2-methoxymethyl-p-phenylenediamine in p-phenylenediamine highly allergic volunteers using allergy alert test: the Italian experience.

Summary: Background. Allergic contact dermatitis after exposure to p-phenylenediamine (PPD)-containing hair dye products is a common and important clinical problem. Because there is a high rate of cross-elicitation of allergic contact dermatitis to other important hair dye products (such as p-toluene diamine [PTD] and other aminophenol hair dyes) in PPD allergic patients, safer alternative dyes with excellent hair coloring options are needed. We studied 2-methoxy methyl-PPD (Me-PPD), a chemical derivative of PPD for tolerance versus cross-elicitation in a cohort of eight PPD-allergic volunteers. Objective. To study tolerance to Me-PPD in a PPD highly allergic Italian cohort. Methods. Eight volunteers with a history of contact dermatitis to hair dyes or other PPD-containing chemicals and positive patch tests to 1% PPD in petrolatum, were recruited to study their immediate and delayed skin reactivity to PPD, vehicle control and 2-methoxy-methyl-PPD (Me-PPD), using the allergy alert test (simulating hair dyeing conditions) on volar forearm skin. This is a short-contact open patch test. Results. All eight volunteers reacted to PPD allergy alert test (100%); none reacted to vehicle (0%), and seven of eight reacted to Me-PPD allergy alert test (88%). However, in those seven volunteers who exhibited cross-elicitation to Me-PPD, their aggregate skin test reactivity to Me-PPD was significantly less than that of PPD (figure 3, p minore 0.0062, highly significant, paired two-tailed, students t test). Conclusions. Me-PPD may offer a safer alternative for PPD-allergic patients with an absent or reduced elicitation response in the allergy alert test simulating hair dye use conditions. Even patients with strong patch test reactions, with appropriate selection by allergy alert test and counselling, may be able to tolerate hair dyeing with Me-PPD containing products.

A new high-throughput method to make a quality control on tattoo inks.

Nowadays, practice of tattooing is very common worldwide and, along with this increasing trend, there is also an increased risk of adverse reactions to tattoo pigments that are well known and described in literature. Previous studies have reported that cutaneous and allergic reactions to a particular pigment can manifest in several ways (allergic contact dermatitis and photo-allergic dermatitis). In this paper, a new high-throughput method is presented, in order to achieve a new system for the quality control on tattoo inks based on chromatographic-spectroscopic approach. The samples, twenty-one tattoo inks and three permanent makeup, comprised the following colors: black inks, yellow, blue, green, white, pink and various shades of red (pigment that gives many allergic responses) were analyzed through the combination of chromatographic and spectroscopic techniques, the HPTLC-Raman. In particular, Raman technique has been chosen because of its high sensitivity towards the inorganic and organic pigments, main constituents of tattoo inks. Moreover, the advantage of this hyphenated technique is to overcome the problem of analysing the complex mixture of tattoo inks, allowing to obtain a Raman spectrum of each single component, isolated by chromatographic separation. This approach aims at developing a powerful instrument to establish the nature of tattoo inks and substances that could be cause adverse reactions in tattooed patients.

S100A8/A9 promotes parenchymal damage and renal fibrosis in obstructive nephropathy.

Despite advances in our understanding of the mechanisms underlying the progression of chronic kidney disease and the development of fibrosis, only limited efficacious therapies exist. The calcium binding protein S100A8/A9 is a damage-associated molecular pattern which can activate Toll-like receptor (TLR)-4 or receptor for advanced glycation end-products (RAGE). Activation of these receptors is involved in the progression of renal fibrosis; however, the role of S100A8/A9 herein remains unknown. Therefore, we analysed S100A8/A9 expression in patients and mice with obstructive nephropathy and subjected wild-type and S100A9 knock-out mice lacking the heterodimer S100A8/A9 to unilateral ureteral obstruction (UUO). We found profound S100A8/A9 expression in granulocytes that infiltrated human and murine kidney, together with enhanced renal expression over time, following UUO. S100A9 KO mice were protected from UUO-induced renal fibrosis, independently of leucocyte infiltration and inflammation. Loss of S100A8/A9 protected tubular epithelial cells from UUO-induced apoptosis and critical epithelial-mesenchymal transition steps. In-vitro studies revealed S100A8/A9 as a novel mediator of epithelial cell injury through loss of cell polarity, cell cycle arrest and subsequent cell death. In conclusion, we demonstrate that S100A8/A9 mediates renal damage and fibrosis, presumably through loss of tubular epithelial cell contacts and irreversible damage. Suppression of S100A8/A9 could be a therapeutic strategy to halt renal fibrosis in patients with chronic kidney disease.

Plasticity of immune system vs. memory therapy IST

Background: Pharmacotherapy and immunotherapy are the main treatments for allergic diseases to inhalants. Objective: This study investigates whether to repeat short cycles of immunotherapy after 3 or 5 years the from interruption of the first therapeutic cycle, lasting 3-4 years, to maintain immune memory in individuals subjected to IST. Methods and Results: We have compared two groups, one of 452 patients who, after the first treatment for 3-4 years of IST, performed a cycle of four months after three and 10 years from the suspension, and a second group of 126 individuals who have performed only the IST treatment for 3-4 years. The best results were obtained in the first group. Conclusions: These results are due to the immune system's plasticity, a very important concept in clinical practice (AU)

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Plasticity of immune system vs. memory therapy IST.

BACKGROUND: Pharmacotherapy and immunotherapy are the main treatments for allergic diseases to inhalants. OBJECTIVE: This study investigates whether to repeat short cycles of immunotherapy after 3 or 5 years the from interruption of the first therapeutic cycle, lasting 3-4 years, to maintain immune memory in individuals subjected to IST. METHODS AND RESULTS: We have compared two groups, one of 452 patients who, after the first treatment for 3-4 years of IST, performed a cycle of four months after three and 10 years from the suspension, and a second group of 126 individuals who have performed only the IST treatment for 3-4 years. The best results were obtained in the first group. CONCLUSIONS: These results are due to the immune system's plasticity, a very important concept in clinical practice.

Successful of subcutaneous and oral hyposensitizing therapy in 30 patients.

SUMMARY: Background. Pharmacotherapy and immunotherapy are the main treatment modalities for respiratory allergy. The aim of this paper has been to evaluate the efficacy and tolerability of subcutaneous and sublingual immunotherapy in association in allergic patients, and to demonstrate that the patients who have performed a second oral vaccination cycle after 4-5 years from the first subcutaneous treatment, derive benefits that may last for years. This is due to immune system's plasticity. Methods. The study was conducted in 30 allergic patients which had previously executed a full cycle of classical subcutaneous immunotherapy, with a partial remission of symptoms. After 4-5 years, they were subjected to sublingual immunotherapy for the same allergen, improving the results obtained. Results. All the patients reported a decrease or absence of clinical symptoms, a reduction in the use of anti-allergic drugs, and lower values of PRIST and RAST after the treatment. Conclusions. The results of this clinical study confirm the improvement of results when subcutaneous and sublingual immunotherapy are associated.

Heavy metal and tattoo: an allergy and legislative problem.

We presented an interesting clinical case of a 23 years old man presented with a 2-week history of pruritus, erythema and papules on legs, arms and trunk. These lesions developed 2 months after tattooing. It showed positive patch test reaction to Copper and Disperse Blu.

Trends of thyroid function and autoimmunity to 5 years after the introduction of mandatory iodization in Italy.

Background. Mandatory iodine fortification of salt was introduced in Italy in 2005. The purpose of our study is to estimate the trend of thyroid diseases in Italy before and after mandatory iodization in Italy. Methods. 7976 patients (6802 females; 1174 males) were examined between 2003 and 2010. We divided the patients into categories according to their clinical diagnosis. Later, we evaluated for each patient if there was the positivity for antibodies anti TPO. Finally, we collected data about TSH values of all patients who did not use therapy for thyroid disease at the time of the examination. To evaluate the differences percentages for categorical variables, χ2-Pearson test was used; to evaluate the percentage differences of TSH values we used the Kruskal-Wallis test. Values were considered statistically significant at p < 0.05. Results. We considered diagnosis of "toxic adenoma / goiter", diagnosis of "Graves' disease" and diagnosis of "hyperthyroidism / thyrotoxicosis" before and after the introduction of mandatory iodization in Italy, to demonstrate the possible presence of iodine-induced hyperthyroidism. Diagnosis of toxic adenoma / goiter before 2005 were 3.7%, while after 2005 they were reduced to 3.1%. Diagnosis of Graves' disease before 2005 were 2.4%, and they remained unchanged after 2005. Finally, diagnosis of hyperthyroidism / thyrotoxicosis decreased from 2.5% to 2.1%. Comparing these results, there were no significant differences (P = 0.261) between the percentages of diagnosis of hyperthyroidism before and after the introduction of mandatory iodization. We considered diagnosis of Hashimoto's thyroiditis before and after 2005 to demonstrate a link between the administration of iodine and thyroid autoimmunity. Prevalence of Hashimoto's thyroiditis between 2003 and 2005 was 37%; prevalence between 2006 and 2010 dropped to 34.7%. This small difference has a borderline statistical significance (P = 0.049). Stratifying TSH values from year to year, we found a small increase in TSH value, which, in any case, remains in the normal range. TSH values passed from 1.37 in 2003, to 1.61 in 2010. Although this increase is modest, it is statistically significant (P values < 0.001). Conclusion. In this study there isn't a connection between iodine fortification and iodine-induced hyperthyroidism, and between iodine fortification and Hashimoto's thyroiditis. This small increase of TSH values can not find a clear explanation yet. We considered several mechanisms to explain this phenomenon: alterations of Na/I symporter reduce intracellular levels of iodine, and cause a state of hypothyroidism; excessive levels of iodine can increase apoptosis of thyrocytes, as it is demonstrated by several studies; interference from external agents (endocrine disruptors).

A case of hypersensitivity to progesterone presenting as an eczematous eruption.

Hypersensitivity to progesterone is a rare condition, and it represents a hypersensitivity reaction to endogenous progesterone. Here we report a case of a woman who presented to our attention for evaluation of a rash for a few years on her posterior elbows, forearms, and right lateral lower extremity. We report this case because it describes a rare clinical entity, with an atypical clinical presentation pemphigoid-like, that is rarely described in literature.

Chemical research on red pigments after adverse reactions to tattoo.

Currently, the incidence of tattooing is on the rise compared to the past, especially among adolescents, and it leads to the urgency of monitoring the security status of tattooing centers, as well as to inform people about the risks of tattoo practice. In our clinical experience, 20% of tattooed patients presented adverse reactions, like allergic contact dermatitis, psoriasis with Koebner's phenomena and granulomatous reactions, with the latter most prevalent and most often related to red pigment. Adverse reactions to tattoo pigments, especially the red one, are well known and described in literature. Great attention has to be focused on the pigments used, especially for the presence of new substances, often not well known. For this reason, we decided to perform a study on 12 samples of red tattoo ink, obtained by patients affected by different cutaneous reactions in the site of tattoo, to analyze their chemical composition.