Regina Renner

Regenerative medicine in dermatology: biomaterials, tissue engineering, stem cells, gene transfer and beyond.

Please cite this paper as: Regenerative medicine in dermatology: biomaterials, tissue engineering, stem cells, gene transfer and beyond. Experimental Dermatology 2010; 19: 697–706.

Associated factors and comorbidities in patients with pyoderma gangrenosum in Germany: a retrospective multicentric analysis in 259 patients

BackgroundPyoderma gangrenosum (PG) is a rarely diagnosed ulcerative neutrophilic dermatosis with unknown origin that has been poorly characterized in clinical studies so far. Consequently there have been significant discussions about its associated factors and comorbidities. The aim of our multicenter study was to analyze current data from patients in dermatologic wound care centers in Germany in order to describe associated factors and comorbidities in patients with PG.MethodsRetrospective clinical investigation of patients with PG from dermatologic wound care centers in Germany.ResultsWe received data from 259 patients with PG from 20 different dermatologic wound care centers in Germany. Of these 142 (54.8%) patients were female, 117 (45.2%) were male; with an age range of 21 to 95 years, and a mean of 58 years. In our patient population we found 45.6% with anemia, 44.8% with endocrine diseases, 12.4% with internal malignancies, 9.3% with chronic inflammatory bowel diseases and 4.3% with elevated creatinine levels. Moreover 25.5% of all patients had a diabetes mellitus with some aspects of potential association with the metabolic syndrome.ConclusionsOur study describes one of the world’s largest populations with PG. Beside the well-known association with chronic bowel diseases and neoplasms, a potentially relevant new aspect is an association with endocrine diseases, in particular the metabolic syndrome, thyroid dysfunctions and renal disorders. Our findings represent clinically relevant new aspects. This may help to describe the patients’ characteristics and help to understand the underlying pathophysiology in these often misdiagnosed patients.

Update on clinical and laboratory features in necrobiosis lipoidica: a retrospective multicentre study of 52 patients

Necrobiosis lipoidica (NL) is a rare granulomatous disorder of unknown etiology which can manifest in ulcerative skin lesions and is widely recognised in association with diabetes mellitus. Our aim was to improve knowledge about the epidemiology and clinical course of NL and evaluate treatment approaches. This multicentre retrospective study covered data from 52 patients with NL of the lower leg, treated between 2006 and 2011. Data from three German dermatological centres were analysed. Twelve men and 40 women, aged 15 to 87 years, were evaluated with regard to epidemiological data, ulcerations, co-morbidities, laboratory values and treatment options. NL was significantly more frequent in women (76.9%). Ulceration of NL was observed in 25% of all patients and in 37.5% with concomitant diabetes mellitus. 88% received topical treatment with corticosteroids, 56% compression therapy of the lower legs, 42% UV-phototherapy and 29% topical calcineurininhibitors. Systemic therapies were also used occasionally. Our data indicate that female sex, middle age and endocrine disorders like diabetes mellitus are characteristics of NL patients. As new aspects, we found an accumulation of thyroidal dysfunction (13%) and that ulcerations are predominantly in males (58%). Associations with co-morbidities may become clearer in prospective studies of larger cohorts. Topical steroids, calcineurin inhibitors, compression therapy and phototherapy seem to be the basis therapies although our evaluation showed that standardized guidelines are missing. More experimental therapeutic options, like biologicals, photodynamic therapy or the use of fumaric acid esters, should be assessed for efficacy and safety by large, randomized, controlled trials.

Bacteriological pathogen spectrum of chronic leg ulcers: Results of a multicenter trial in dermatologic wound care centers differentiated by regions

In almost every chronic wound different bacteria species can be detected.

Successful therapy of a patient with therapy recalcitrant generalized bullous scleroderma by extracorporeal photopheresis and mycophenolate mofetil.

© 2008 The Authors 631 JEADV 2008, 22, 616–650 Journal compilation

Contact sensitization to modern wound dressings in 70 patients with chronic leg ulcers.

Background Patients with chronic leg ulcers typically experience contact allergy to topical treatments. Although declared as hypoallergenic, modern wound dressings have caused several reported cases of contact allergy. Objective The aim of the study was to evaluate any allergenic potential of modern wound dressings in patients with leg ulcers. Methods Seventy-one patients were included in our prospective observation. Patch tests were performed with a selection of 10 modern wound dressings and with selected allergens according to series of the German Contact Dermatitis Research Group (DKG). Results Of 70 patients eligible for evaluation, 12 (17%) were positive for the hydrogel NuGel, followed by the hydrocolloid NuDerm (n = 7/70, 10%) and the ionic silver−containing wound dressing Aquacel Ag and the gauze Adaptic (both n = 4/70, 5%). Patients with recalcitrant ulcers of prolonged duration showed a significant higher number of epicutaneous sensitizations to wound dressings than patients with shorter ulcer duration. Conclusions The allergenic potential of modern wound dressings should not be underestimated. There is need for precise declaration of all ingredients.

Changes in quality of life for patients with chronic venous insufficiency, present or healed leg ulcers.

Background: Patients with chronic leg ulcers are handicapped in daily life, both by physical complaints and social problems. The aim of our study was not only to assess a possible impairment of quality of life (QOL) of leg ulcer patients but also to evaluate if there is a real improvement of QOL after healing of the ulcer. Patients with chronic venous insufficiency served as the control group. We further analyzed if there were significant differences in the response between patients who were and were not performing compression therapy.

Sister Mary Joseph's nodule as a metastasis of gallbladder carcinoma

Umbilical metastasis, alias Sister Mary Josephs nodule, is a rare clinical phenomenon. It indicates neoplasm of inner organs mostly located in the gastrointestinum or the pelvis. However, in approximately 15–30% the primary tumor remains occult. In most cases Sister Josephs nodule appears as an early and sometimes the only symptom of the malignoma. Here we report on an umbilical metastasis of a gallbladder carcinoma with subsequent manifestation of other tumor complications such as extensive thrombosis of arm veins.

Aetiology, comorbidities and cofactors of chronic leg ulcers: retrospective evaluation of 1 000 patients from 10 specialised dermatological wound care centers in Germany

Numerous comorbidities and cofactors have been known to influence wound healing processes. In this multicentre study, clinical data of 1 000 patients with chronic leg ulcers from ten specialised dermatological wound care centers were analysed. The patient cohort comprised 567 females and 433 males with an average age of 69·9 years. The wounds persisted on average for 40·8 months and had a mean size of 43·7 cm2. Venous leg ulcers represented the most common entity accounting for 51·3% of all chronic wounds, followed by mixed‐type ulcers in 12·9% and arterial ulcerations in 11·0% of the patients. Vasculitis was diagnosed in 4·5%, trauma in 3·2%, pyoderma gangrenosum in 2·8%, lymphoedema in 1·7%, neoplasia in 1·0% and delayed post‐surgical wound healing in 0·6% of the included patients. In total, 70·5% of patients suffered from arterial hypertension, 45·2% were obese, 27·2% had non‐insulin dependent diabetes, and 24·4% dyslipidaemia. Altogether 18·4% suffered from metabolic syndrome. Cofactors and comorbidities of patients with chronic leg ulcers have previously been studied but not in detail. Here, we were able to demonstrate the existence of several potentially relevant cofactors, comorbidities of their associations and geographical distributions, which should be routinely examined in patients with chronic leg ulcers and – if possible – treated.

Incidental cases of subacute cutaneous lupus erythematosus in association with malignancy

Malignancy and chronic inflammatory diseases seem to be associated to one another. Here we review the literature regarding subacute cutaneous lupus erythematosus (SCLE) and concomitant neoplasia on the basis of 3 short case reports of patients with SCLE who developed breast cancer and lung cancer respectively after long-term disease activity and immunosuppressive therapy. Possible hypotheses for this co-incidence could be: i) malignancy as a consequence of chronic inflammation, ii) malignancy as a consequence of immunosuppressive therapy, iii) paraneoplastic disease, iv) local malignancy following a persisting proliferative or reparative process or v) only coincidental occurrence.