[Diagnostics of primary cutaneous lymphomas]. / Diagnostik kutaner Lymphome.

Primary cutaneous lymphomas can be diagnosed when the clinical symptoms, histology, immunohistology and molecular biological changes are characteristic of primary cutaneous T or B­cell lymphomas; however, in many cases not all of the changes are typical of a primary cutaneous lymphoma especially in the early stages; therefore, the diagnosis of a primary cutaneous lymphoma can be a challenge. This is especially true for the Sézary syndrome, which can initially prove to be difficult to differentiate from reactive erythroderma; therefore, the main focus of this review is the diagnostics of Sézary syndrome. The review also summarizes the clinical heterogeneity and describes the classical histological and immunohistochemical changes for the diagnosis of Sézary syndrome. Recent data from different multicenter, international studies by the cutaneous lymphoma task force of the European Organisation for Research and Treatment of Cancer (EORTC) on dermatological alterations of the skin and the detection of Sézary cells in blood are addressed. The detection of Sézary cells in the blood still remains a challenge despite improved molecular boiological and cytogenetic characterization of tumor cells. The latest studies of the EORTC group particularly identified CD158k, MYC, MNT, DNM, TWIST1, EPHA4 and PLS3 as valuable markers for the differentiation of reactive erythroderma but which are not yet part of the standard diagnostics of Sézary syndrome. Further studies are required to see if these markers can be used in the routine clinical application.

[Single center analysis of the dermatosurgical patient cohort of a tumor center in Germany]. / Betrachtung des dermatochirurgischen Patientenkollektivs an einem Hauttumorzentrum in Deutschland.

BACKGROUND: The incidence of skin cancer continues to increase. However, little is known about the dermatosurgical characteristics of the patients. PATIENTS AND METHODS: In this single center, retrospective study, dermatosurgical reports of all patients treated because of basal cell carcinomas (BCC), squamous cell carcinomas (SCC), and malignant melanoma (MM) between 2004 and 2013 were analyzed. RESULTS: During the observed period, the number of operated BCC rose by a factor of 1.86 and the number of MM by a factor of 2.3. In comparison to BCC/MM, there was a disproportionately high increase of SCC by a factor of 4.02. The average age was 71.5 ± 13.4 years (minimum: 14 years; maximum: 104 years), whereupon a significant increase of male age and a significant decrease of female age occurred. Almost 70% of all tumors were located in the head and neck area. The nose was most commonly treated. CONCLUSIONS: During the last 10 years, the cohort of dermatosurgical patients changed in the tumor center. This should be verified in multicenter studies.

Neodymium-doped yttrium aluminium garnet (Nd:YAG) 1064-nm picosecond laser vs. Nd:YAG 1064-nm nanosecond laser in tattoo removal: a randomized controlled single-blind clinical trial.

BACKGROUND: For decades, nanosecond lasers (NSLs) have been used to remove tattoos. Since 2012, pulses of picosecond lasers (PSLs) have been available for tattoo removal. Based on a few observational studies, the claim has been made that PSLs are considerably more effective while showing fewer side-effects in comparison with NSLs. OBJECTIVES: To compare the efficacy and side-effects of a PSL side by side with an NSL for tattoo removal. METHODS: Twenty-one patients with 30 black tattoos were treated with PSL and NSL in a split-study design in two sessions at intervals of 6 weeks. The safety and efficacy of laser treatments were determined by blinded observers assessing randomized digital photographs in this prospective clinical study. The primary end point was the clearance of the tattoos ranging in quartiles from 0% to 100%; secondary end points were side-effects and pain. RESULTS: The average clearance overall as evaluated showed no statistical difference between NSL and PSL (P = 1·00). Using a visual analogue scale (0 = no pain, 10 = maximum pain), a value of 3·8 ± 1·0 was reported for the PSL, which was statistically different from NSL (7·9 ± 1·1, P < 0·001). Transient side-effects were observed, as well as hypo- and hyperpigmentation, but there was no statistically significant difference between PSL and NSL. CONCLUSIONS: After two treatments of black tattoos with a neodymium-doped yttrium aluminium garnet laser (1064 nm), the use of picosecond pulses does not provide better clearance than nanosecond pulses. However, pain is less severe when using a PSL.

Histopathological and immunophenotypical criteria for the diagnosis of Sézary syndrome in differentiation from other erythrodermic skin diseases: a European Organisation for Research and Treatment of Cancer (EORTC) Cutaneous Lymphoma Task Force Study of 97 cases.

BACKGROUND: Patients with erythrodermic disease are a diagnostic challenge regarding the clinical and histological differential diagnosis. OBJECTIVES: To evaluate histopathological and immunohistochemical diagnostic markers for Sézary syndrome. METHODS: Ninety-seven erythrodermic cases [Sézary syndrome (SS), n = 57; erythrodermic inflammatory dermatoses (EIDs), n = 40] were collected by the EORTC Cutaneous Lymphoma Task Force histopathology group. Evaluation criteria were (i) epidermal and dermal changes; (ii) morphology of the infiltrate; (iii) immunohistochemical analysis of marker loss (CD2, CD3, CD4, CD5 and CD7); (iv) bystander infiltrate by staining for CD8, FOXP3 and CD25; and (v) expression of Ki-67, CD30, PD-1 and MUM-1. RESULTS: The workshop panel made a correct diagnosis of SS in 51% of cases (cutaneous T-cell lymphoma 81%) and of EID in 80% without clinical or laboratory data. Histology revealed a significantly increased degree of epidermotropism (P < 0.001) and more intraepidermal atypical lymphocytes (P = 0.0014) in SS biopsies compared with EID. Pautrier microabscesses were seen only in SS (23%) and not in EID (P = 0.0012). SS showed significantly more dermal cerebriform and blastic lymphocytes than EID. Immunohistochemistry revealed a significant loss of CD7 expression (< 50%) in 33 of 51 (65%) cases of SS compared with two of 35 (6%) EID (P < 0.001). The lymphocytic infiltrate in SS skin samples was found significantly to express PD-1 (P = 0.0053), MUM-1 (P = 0.0017) and Ki-67 (P < 0.001), and showed less infiltration of CD8(+) lymphocytes (P < 0.001). A multivariate analysis identified CD7 loss, increased numbers of small cerebriform lymphocytes, low numbers of CD8(+) lymphocytes and increased proliferation (Ki-67(+) lymphocytes) as the strongest indicators for the diagnosis of SS. CONCLUSIONS: A number of different histological and immunophenotypical criteria are required to differentiate between SS and EIDs.

Expression of the T-cell regulatory marker FOXP3 in primary cutaneous large B-cell lymphoma tumour cells.

BACKGROUND: Primary cutaneous B-cell lymphomas (PCBCL) are subdivided into the aggressive form, primary cutaneous diffuse large B-cell lymphoma, leg type (PCLBCL, LT) and two subtypes of indolent behaviour (primary cutaneous follicle centre lymphoma and primary cutaneous marginal zone B-cell lymphoma). The difference in clinical behaviour can be explained by the tumour cell itself, or the lymphoma microenvironment including the antitumour immune response. OBJECTIVES: To investigate the presence of regulatory T cells (Treg), CD4+CD25+FOXP3+, in the microenvironment of PCBCL in correlation with clinical outcome. METHODS: Tumour specimens of 55 consecutive cases of PCBCL were blinded and analysed for FOXP3, CD4 and CD25 expression by immunohistochemistry. Confocal images were taken with a Leica SP5. Statistical analyses were performed to determine significance. The test was considered significant when P<0.05. RESULTS: The CD4 and FOXP3 expression as well as the CD4/FOXP3 ratio were significantly increased in PCBCL of indolent behaviour in contrast to PCLBCL, LT (P=0.0002 for CD4, P<0.0001 for FOXP3 and P=0.0345 for FOXP3/CD4 ratio). CD25 expression did not differ in the three groups (P=0.9414). Within the group of patients with PCLBCL, LT we identified a subgroup with FOXP3+ tumour cells as demonstrated by CD20/FOXP3 double stainings. Patients with FOXP3+ PCLBCL, LT tumour cells showed a better prognosis on Kaplan-Meier analysis. CONCLUSION: High numbers of Treg in the lymphoma microenvironment correlate with a better prognosis in PCBCL. In PCLBCL, LT the presence of FOXP3+ tumour cells is beneficial for prognosis suggesting that FOXP3 expression of PCLBCL, LT tumour cells might serve as a tumour suppressor.

[Asymptomatic nodule on an elderly lady's thumb tip]. / Asymptomatischer Nodus am Daumen einer älteren Frau.

A 71-year-old woman presented with an asymptomatic growing dermal tumor on her thumb. Clinical picture, ultrasound, laboratory investigations and histology were consistent with the diagnosis of gouty tophus. Pathogenesis, risk factors and therapy of tophaceous gout are discussed.

One-stage reconstruction of deep facial defects with a single layer dermal regeneration template.

BACKGROUND: The reconstruction of deep facial wounds in oncological surgery is challenging. Especially for elderly multimorbid patients, a rapid procedure with acceptable aesthetic and reliable functional outcome is required. Recently, a new single layer skin substitute was developed. Integra® dermal regeneration template single layer (IDRT-SL) allows one-stage surgery in combination with split thickness skin grafting. However, no study has yet analysed the efficiency of IDRT-SL treatment. OBJECTIVES: To evaluate applicability and efficiency of the IDRT-SL treatment in combination with split thickness skin grafting for a one-step closure of deep facial surgical wounds in elderly multimorbid patients. PATIENTS/METHODS: This prospective study analysed the functional and aesthetic outcome after reconstruction with an IDRT-SL template and an immediate split thickness skin graft in the face (80±3 years; >3 concomitant diseases). RESULTS: Nine tumours, four basal cell carcinoma, two lentigo maligna, one spinal cell carcinoma, one lentigo maligna melanoma and one Bowen carcinoma were resected. Five defects were located on the nose and four on the cheek. The mean defect size was 11±3 cm2. All but one graft were taken completely without any complication. One patient suffered from a partial graft loss (30%). All defects showed significant shrinkage of 61±4%. CONCLUSIONS: One-stage reconstruction with a combination of IDRT-SL and split thickness skin grafting is an elegant, easy and rapid method to treat deep skin defects. The take rates, functional and early cosmetic outcome are promising. This new method should be considered for selected cases of elderly multimorbid patients with deep facial wounds.

Skin substitutes in dermatosurgery.

Skin substitutes are a growing market since technical advancements have allowed a substantial progress in treating extensive defects of the skin. A variety of skin substitutes with different properties and thus resulting different indications is offered on the market. Important benefits of skin substitutes are their ready availability in almost any quantity and the predictable product properties concerning implantation, incorporation, resorption and long-term outcome. Although, most skin substitutes still need skin grafts at a later date which is disadvantageous. Nevertheless dermal substitutes have reduced the need for thick skin grafts allowing the donor site and the patient to heal faster with fewer surgeries. The use of skin substitutes in dermatologic surgery is widespread and new fields of application are emerging. The variety of artificial skin has definitely changed the reconstructive ladder helping to cover larger defects with less time and effort which is an important issue especially in elderly and multimorbid patients. In the last years a growing number of studies in the literature report the use of artificial skin substitutes to secure a rapid reconstruction with reliable cosmetic and functional results after oncological resections. Furthermore, skin substitutes are used to cover chronic wounds like diabetic foot ulcers or venous leg ulcers to promote healing. Congenital diseases like giant hairy nevi, aplasia cutis congenital or epidermolysis bullosa are conditions in children where skin substitutes play a role. But even in tissue augmentation or in cosmetic surgery skin substitutes come into vogue. The latest advance are cultured autologous or allogenic substitutes some even in combination with alloplastic material. Besides of medical questions that arise from the use of these materials in reconstructive surgery legal and economic aspects have to be taken into account. This article is giving an overview over the most common skin substitutes and their use in dermatosurgery.

Long-term results after reconstruction of full thickness scalp defects with a dermal regeneration template.

OBJECTIVE: Large scalp defects in which the pericranium has to be resected can be reliably reconstructed using Integra. In the present study, we retrospectively analysed the long-term outcome of our patients. METHODS: Nineteen patients were included who had received Integra dermal regeneration template for treatment of full thickness scalp defects after resection of various malignant tumours. All patients were followed up with a mean follow-up time of 31 months (14-72). RESULTS: All transplants were on almost equal levels with the surrounding skin. Cosmetic results were acceptable and scars were stable. Nodal ultrasound status was negative in all patients. During the follow-up period of up to 72 months, no local recurrences were observed. One patient with a leiomyosarcoma received radiotherapy after transplantation. In the irradiated area, multiple small regular-shaped round ulcerations and later on partial necrosis of the transplant occurred when the patient developed renal failure 29 months after the initial operation. Five patients died of disease not related to the primary skin tumour. All other patients are alive and free of disease without any complications. CONCLUSION: After reconstruction of full thickness scalp defects with Integra, the cosmetic results are appealing and we observed no local recurrences during the follow-up period.