Treatment of keloids with laser-assisted topical steroid delivery: a retrospective study of 23 cases.

Topical or intralesional corticosteroids are referred to as gold standard treatments for keloids. Recent studies showed that ablative fractional laser (AFL) treatment facilitates delivery of topical drug deeply into the skin by creating vertical channels. The objective of the present study was to assess the ablative erbium laser in fractionated mode, combined with topical high potent corticosteroid cream for treating resistant keloid scars. We conducted a retrospective study in the laser center of the Department of Dermatology (University Hospital of Nice, France), from January 2010 to June 2012, on patients with keloids who were resistant to a first-line of treatment. A 2940-nm ablative fractional erbium laser was used. Topical betamethasone cream was applied twice a day under occlusion with transparent film dressings. A total of 23 patients with 70 keloids were treated from January 2010 to June 2012. The median percentage of improvement was 50% (range -43 to 84). The mean follow-up was 8 months (range 3-18), and a recurrence was observed for eight lesions (22%). Although this observation warrants a prospective comparative evaluation, it supports the interest of the laser-assisted delivery of steroids for treating keloids scars.

In vivo reflectance confocal microscopy of the skin: a noninvasive means of assessing body cystine accumulation in infantile cystinosis.

BACKGROUND: Patients with infantile nephropathic cystinosis have progressive accumulation of cystine in tissues leading to delayed extrarenal complications. No simple tool is available to evaluate the level of body cystine accumulation. OBJECTIVE: We sought to determine the value of in vivo reflectance confocal microscopy of the skin in patients with infantile nephrogenic cystinosis. METHODS: Nine patients and control subjects were recruited for this study. Images were acquired by means of a near-infrared reflectance confocal laser scanning microscope. RESULTS: Scattered bright particles within the papillary dermis were observed in all patients but not in control subjects. The density of particles ranged from numerous (+++) to very few (+/-) and their distribution was heterogeneous. Electron microscopy confirmed that these particles corresponded to cystine crystal deposits within dermal fibroblasts. The density of cystine crystals within the dermis was greater in older patients, in patients with a high leukocyte cystine concentration, and with delayed cysteamine therapy. There was no correlation between the density of cystine deposits and renal disease or hypopigmentation but high levels of deposition occurred in association with extrarenal manifestations. LIMITATIONS: This is a preliminary study on a small sample of patients. Repeated examination and longer follow-up is necessary. CONCLUSION: In vivo reflectance confocal microscopy of the skin appears to be a noninvasive means of assessing body cystine accumulation in infantile cystinosis and could be used as a complementary marker of treatment response in addition to leukocyte cystine measurement.

Cystinosin is a melanosomal protein that regulates melanin synthesis.

Cystinosis is a rare autosomal recessive disease characterized by cystine crystal accumulation leading to multiorgan dysfunctions and caused by mutation in CTNS. CTNS encodes cystinosin, a cystine/H(+) symporter that exports cystine out of the lysosomes. Patients with cystinosis frequently exhibit blond hair and fair complexion, suggesting an alteration in melanogenesis. However, the pigmentation singularities of these patients have not been studied, and the role of cystinosin in melanogenesis has remained unknown. In our study, a clinical evaluation of 27 patients with cystinosis showed that 44% had a cutaneous pigmentation dilution compared to their relatives. Analysis of the hair melanin content in these patients by HPLC demonstrated a 50% decrease in eumelanin (4360 vs. 9360 ng/mg), and a 2-fold increase in pheomelanin (53 vs. 20 ng/mg), the yellow/red pigments. Cystinosin-deficient mice also showed a 4-fold increase in hair pheomelanin content. In vitro studies showed that cystinosin was located at melanosomes. CTNS silencing led to a 75% reduction of melanin synthesis that was caused by a degradation of tyrosinase by lysosomal proteases. Our results objectify the pigmentation defect in patients with cystinosis. We also identify the role of CTNS in melanogenesis and add a new gene to the list of the genes involved in the control of skin and hair pigmentation.

Medial fronto-facial capillary malformations.

OBJECTIVE: To evaluate the characteristics of facial medial capillary malformations (CM), which differ from salmon patches by their wider extent, darker color, and incomplete resolution. STUDY DESIGN: Children were prospectively recruited from pediatric dermatology clinics and retrospectively from clinical and photographic databases. RESULTS: From June 2006 to June 2008, 84 children (56 girls; 66.6%) were included. The medial fronto-FCM (FFCM) involved the forehead and glabella (100%), upper eyelids (57.1%), nose (66.6%), philtrum (50.0%), and upper lip (22.6%). Extended forms were observed in 26.2%. A similar FFCM was observed within the family in 27.3% of cases. Outcome data showed complete regression in 10%, incomplete in 71.1%, and unchanging in 18%. An association with an extra facial CM was found 67.8%. Nape and/or occipital CM were associated in 63.8%. A median dorsal CM, mostly lumbosacral, was observed in 13.4%. An associated disease was seen in 33.3%. Neurological anomalies were observed in 9.5% (two cases of developmental delay, two of epilepsy, one of macrocephaly, one of cerebral arteriovenous malformation, one of cutis marmorata telangiectatica congenita, one of "macrocephaly- cutis marmorata telangiectatica congenita," and one of Rubinstein Taybi syndrome). No correlation between the site or the extent of the FFCM and extrafacial vascular or neurological anomaly was found. CONCLUSIONS: This study identifies a specific type of congenital medial FFCM that looks like salmon patch but has a wider median topography, a darker color, with slower and often incomplete resolution. Family cases are often observed. Despite their slow and incomplete regression, the aesthetic consequences are mild.