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H P Soyer

Publications and source records attributed to H P Soyer.

At least 19 recordsLinked to original sources
PubMed2001

Dermoscopic criteria for melanoma in situ are similar to those for early invasive melanoma.

BACKGROUND: Dermoscopy is a noninvasive technique that increases the diagnostic accuracy of pigmented skin lesions, particularly improving the diagnosis of patients with cutaneous melanoma in situ (CMIS) and early invasive melanoma. To establish reliable and reproducible dermoscopic criteria for the diagnosis of CMIS, the authors conducted a retrospective clinical study of 37 patients with CMIS and 53 patients with invasive cutaneous melanomas (ICM). METHODS: The 37 patients with CMIS were divided into three groups: those with CMIS lesions measuring < or = 5 mm in greatest dimension (8 patients), those with CMIS lesions measuring from > 5 mm to < or = 10 mm in greatest dimension (20 patients), and those with CMIS lesions measuring > 10 mm in greatest dimension (9 patients). The 53 patients with ICM were divided into two groups according to Breslow index: those with ICM lesions measuring < or = 0.75 mm in tumor thickness (19 patients) and those with ICM lesions measuring > 0.75 mm in tumor thickness (34 patients). Lesions were examined with a dermatoscope and were photographed at a magnification of x10. Dermoscopic criteria were evaluated from examination of the photomicrographs. RESULTS: Blue-whitish veil, gray-blue areas, black dots, and irregular extensions and branched streaks were the most relevant dermoscopic criteria for CMIS and were present in 78%, 76%, 73%, and 62% of lesions, respectively. Brown globules, irregular pigment network, pseudopods, and depigmentation were present in 57%, 54%, 54%, and 51% of CMIS lesions, respectively. White scar-like areas and linear and/or dotted vascular patterns, two criteria that are associated frequently with ICM, were not found in our patients with CMIS. No clinically significant differences were observed between the three groups of CMIS patients. CONCLUSIONS: Dermoscopic criteria for CMIS were similar to those for ICM, although white scar-like areas and linear and/or dotted vascular patterns were observed only in patients with ICM. Dermoscopic criteria appeared to be independent of CMIS lesions size.

Adolescent↗
PubMed2001

Rudimentary meningocele: remnant of a neural tube defect?

BACKGROUND: Rudimentary meningocele, a malformation in which meningothelial elements are present in the skin and subcutaneous tissue, has been described in the past under a variety of different terms and has also been referred to as cutaneous meningioma. There has been debate as to whether rudimentary meningocele is an atretic form of meningocele or results from growth of meningeal cells displaced along cutaneous nerves OBJECTIVE: We reviewed the clinical, histological, and immunohistochemical characteristics of rudimentary meningocele in an attempt to assess the most likely pathologic mechanism for it. DESIGN: Retrospective study. SETTING: University hospitals. PATIENTS: Thirteen children with rudimentary meningocele. MAIN OUTCOME MEASURES: Medical records were reviewed and histopathologic examination as well as immunohistochemistry studies were performed for each case. A panel of immunoperoxidase reagents (EMA, CD31, CD34, CD57, S-100, and CAM 5.2) was used to assess lineage and to confirm the meningothelial nature of these lesions. RESULTS: Recent evidence indicating a multisite closure of the neural tube in humans suggests that classic meningocele and rudimentary meningocele are on a continuous spectrum. CONCLUSION: Rudimentary meningocele seems to be a remnant of a neural tube defect in which abnormal attachment of the developing neural tube to skin (comparable to that in classic meningocele) could explain the presence of ectopic meningeal tissue. In the majority of cases, no underlying bony defect or communication to the meninges could be detected. However, in light of the probable pathogenesis, imaging studies to exclude any communication to the central nervous system should precede any invasive evaluation or intervention.

Child↗
PubMed2001

Dermoscopic classification of atypical melanocytic nevi (Clark nevi).

OBJECTIVES: To create a dermoscopic classification of atypical melanocytic nevi (Clark nevi) and to investigate whether individuals bear a predominant type. DESIGN: Digital dermoscopic images of Clark nevi were classified according to structural features, ie, reticular, globular, or homogeneous patterns or combinations of these types. The nevi were also characterized as central hypopigmented or hyperpigmented, eccentric peripheral hypopigmented or hyperpigmented, or multifocal hypopigmented or hyperpigmented. SETTING: Two pigmented skin lesion clinics. PATIENTS: We examined 829 Clark nevi on 23 individuals. MAIN OUTCOME MEASURE: A reliable dermoscopic classification of Clark nevi and frequency of different dermoscopic types. RESULTS: Using the dermoscopic classification, the 829 Clark nevi were classified as follows: 221 (26.7%) as reticular, 167 (20.1%) as reticular-homogeneous, 148 (17.9%) as globular-homogeneous, 112 (13.5%) as reticular-globular, 89 (10.7%) as homogeneous, 84 (10.1%) as globular, and 8 (1.0%) as unclassified. Most individuals were prone to a predominant type of Clark nevus. Seven individuals (30%) showed a single type of Clark nevus in more than 50% of their nevi and 5 (22%) in more than 40% of their nevi. CONCLUSIONS: The proposed dermoscopic classification of Clark nevi is easily applicable and allows a detailed characterization of the different dermoscopic types of Clark nevi. Knowledge of these dermoscopic types should reduce unnecessary surgery for benign melanocytic lesions. Exact classification of the different types of Clark nevi is a necessary prerequisite for further clinical, dermoscopic, and histopathologic studies, which will give new insights in the biology of acquired melanocytic nevi.

Adolescent↗
PubMed2001

[Blueberry muffin baby: the pathogenesis of cutaneous extramedullary hematopoiesis].

Two neonates exhibited the clinical picture of the "blueberry muffin baby" at delivery. The integument manifested petechiae and purpuric magenta-colored macules, papules, and plaques, as well as blueberry-colored ecchymoses. These findings led to the diagnosis of a connatal cytomegalovirus infection and fetal erythroblastosis, respectively. The hemorrhagic-purpuric looking skin lesions reflected extramedullary hematopoiesis with ultrastructural study disclosing evidence of both erythro- and granulopoietic lineage. For the first time, we were able to demonstrate that complexes of red cells in various stages of maturation can occur in the skin, similarly to the erythroblastic islands of the bone marrow. In the pathogenesis of extramedullary hematopoiesis, mechanisms underlying the reconstitution of blood cells must be considered. These may reactivate hematopoiesis in organs where it previously occurred in embryonic and fetal life. Possible causative factors may be great compensatory demand, deficient replacement, or loss or dysfunction of corpuscular blood elements. This would explain the occurrence of this disease entity in conjunction with etiologically completely heterogeneous systemic diseases.

Cytomegalovirus Infections↗
PubMed2001

Histopathologic correlates of dermoscopic criteria.

The correct interpretation of dermoscopic features requires an understanding of the corresponding histopathologic correlates. This articles addresses the importance of performing an exact dermoscopic-pathologic correlation when evaluating pigmented lesions of the skin. The histopathologic structures underlying most dermoscopic criteria are extensively described.

Dermatology↗
PubMed2001

Dermoscopy of pigmented skin lesions--a valuable tool for early diagnosis of melanoma.

The clinical use of dermoscopy has uncovered a new and fascinating morphological dimension of pigmented skin lesions. Dermoscopy is a non-invasive diagnostic technique that links clinical dermatology and dermatopathology by enabling the visualisation of morphological features not seen by the naked eye. Close examination of pigmented skin lesions in this way increases the effectiveness of clinical diagnostic tools by providing new morphological criteria for distinguishing melanoma from other melanocytic and non-melanocytic pigmented skin lesions. In the past, dermoscopy has been known by various names, including skin surface microscopy, epiluminescence microscopy, incident light microscopy, dermatoscopy, and videodermatoscopy. However, the term 'dermoscopy', first used by Friedman and colleagues in 1991, is the most widely used.

Humans↗
PubMed2001

Ultraviolet exposure as the main initiator of p53 mutations in basal cell carcinomas from psoralen and ultraviolet A-treated patients with psoriasis.

Basal cell carcinoma, the most frequent skin cancer in humans, is often linked to chronic sun exposure. In psoralen and ultraviolet A-treated psoriatic patients, basal cell carcinomas may occur even more frequently; however, the exact etiology and mechanisms of tumorigenesis in psoriatic patients are unclear because psoralen and ultraviolet A is not only a carcinogen but also an immunosuppressor and because psoralen and ultraviolet A-treated psoriatic patients often have other (co)carcinogenic risk factors (e.g, therapeutic exposure to ultraviolet B, X-ray radiation, arsenic, tar, and/or chemotherapeutic agents such as methotrexate). In this study, we analyzed the DNA of 13 basal cell carcinomas from five psoralen and ultraviolet A-treated psoriatic patients for mutations of the p53 tumor suppressor gene. DNA sequencing revealed a total of 11 mis-sense, two non-sense, and four silent mutations in seven of the 13 basal cell carcinomas (54%). Of the 13 total mis-sense or non-sense mutations, 12 (92%) occurred at dipyrimidine sites and nine (69%) were of the ultraviolet fingerprint type (eight C-->T transitions and one CC-->TT transition). Three of the C-->T transitions occurred at dipyrimidine sites opposite a 5'-TpG sequence (a potential psoralen-binding site and target for psoralen and ultraviolet A mutagenesis). Thus, whether these mutations were induced by ultraviolet or psoralen and ultraviolet A was not clear. In addition, two other mutations (15%) occurred at 5'-TpG sites, one (8%) occurred at a 5'-TpA site (the most frequent site of psoralen binding and mutagenesis in cell and murine studies), and one (8%) involved a G-->T transversion. These results suggest that (i) the major initiator of p53 mutations in basal cell carcinoma in psoralen and ultraviolet A-treated psoriasis patients is environmental and/or therapeutic ultraviolet(B) exposure, and that (ii) psoralen and ultraviolet A itself causes only a smaller portion of p53 mutations in psoralen and ultraviolet A-associated basal cell carcinomas.

Adult↗
PubMed2001

Superficial black network: an additional dermoscopic clue for the diagnosis of pigmented spindle and/or epithelioid cell nevus.

Dermoscopy is a valuable method for improving the diagnostic accuracy of pigmented skin lesions. Specific dermoscopic criteria have been described for differentiating pigmented spindle and/or epithelioid cell nevi (SECN; Spitz nevi and Reed nevi) from cutaneous melanomas. In the present study, we report an additional dermoscopic feature of SECN, namely a distinctive type of pigment network, described as superficial black network, which was observed in 10.5% of SECN. Histopathologically, this network corresponds to focal areas of pigmented parakeratosis, producing a black reticulated appearance on the horizontal plane.

Adolescent↗
PubMed2000

Granulomatous cheilitis and Borrelia burgdorferi: polymerase chain reaction and serologic studies in a retrospective case series of 12 patients.

BACKGROUND: Granulomatous cheilitis (GC) is a chronic granulomatous inflammation of the lips of unknown etiology, which may be associated with peripheral facial nerve paralysis and/or lingua plicata (Melkersson-Rosenthal syndrome [MRS]). Borrelia burgdorferi is a spirochete that causes Lyme borreliosis, a multisystemic infectious disease with frequent occurrence of facial nerve paralysis. An etiologic role of B burgdorferi in various granulomatous diseases has been suggested. The present study was performed to examine a possible causative role of B burgdorferi for GC/MRS by B burgdorferi-specific polymerase chain reaction analysis of biopsy specimens from affected lip tissue and determination of B burgdorferi IgG and IgM serum antibodies using enzyme-linked immunosorbent assay and immunoblot tests. OBSERVATIONS: We examined a retrospective case series of 12 patients with GC/MRS from a Lyme borreliosis endemic area (median duration of disease, 8 months [range, 3-348 months]). Borrelia burgdorferi-specific DNA could not be amplified by polymerase chain reaction in any of the 12 patients. One (13%) of 8 patients tested had a serum B burgdorferi IgG response on enzyme-linked immunosorbent assay, and 2 patients (25%) had an IgM response, but immunoblot testing yielded negative results in all 8 patients. CONCLUSION: The results of the present study do not indicate that B burgdorferi has an etiologic role in GC/MRS.

Adult↗
PubMed2000

[Squamous epithelial carcinoma in erythema ab igne].

Erythema ab igne (EAI) is a red-brown net-like hyperpigmentation due to repetitive exposure to submaximal heat over a long period of time. This rash is typically seen on the anterior lower legs of people who sit in front of open fireplaces or coal stoves and on the trunk of patients with chronic disorders who seek pain relief by long-term use of hot-water bottles or heating pads. EAI can not only be a diagnostic sign for underlying internal diseases including malignant tumors but can also give rise to cutaneous malignancies. We report on a 75-year-old female patient who developed several thermal keratoses and squamous cell carcinomas at the site of erythema ab igne caused by chronic heat exposure over several years.

Abdominal Neoplasms↗
PubMed2000

[Cutaneous angiosarcoma].

BACKGROUND AND OBJECTIVES: Angiosarcomas of the skin arise almost exclusively in the following clinical settings: 1. the face and scalp, usually in elderly individuals, 2. lymphedematous regions (lymphedema-associated angiosarcomas), and 3. skin that has been previously irradiated (post-radiation angiosarcomas). Clinical and histopathologic diagnosis of angiosarcoma is difficult often resulting in great delay that obviates against early and possibly successful treatment of these very aggressive neoplasms. Diagnostic problems are described, and prognostic factors as well as the effect of different forms of treatment on the outcome are discussed. PATIENTS/METHODS: Retrospective study of 11 patients with cutaneous angiosarcomas. Clinical presentation, histopathology, therapy and survival time are analysed. RESULTS: Only 1 of 11 cases cutaneous angiosarcoma was clinically identified. Survival time was 1-24 months. Three patients who received radical surgery have not developed metastases and are still alive. CONCLUSIONS: Clinical and histopathologic diagnosis of cutaneous angiosarcomas is often very difficult. Prognosis is very bad; radical surgery seems to be the best therapeutical option.

Adult↗
PubMed2000

Basaloid neoplasms in nevus sebaceus.

BACKGROUND: Nevus sebaceus (NS) (organoider nevus) may frequently be associated with the development of a number of benign and malignant neoplasms among which basaloid neoplasms are the most common. Histopathologic criteria for diagnosis and classification of basaloid proliferations arising in NS are still debated. Most previous investigators have considered them to represent mainly basal cell carcinomas (BCCs). On the contrary, a number of recent authors have proposed that most basaloid neoplasms in NS exhibit predominantly morphologic features implying benignancy, thus representing trichoblastomas (TBs). In this study, we attempted to characterize better the histopathologic features of basaloid neoplasms in NS in a large series based on current morphologic criteria. METHODS: Three-hundred and sixteen cases of NS seen over 19 years were consecutively sampled and reviewed for basaloid neoplasms. Twenty-four cases of basaloid neoplasms in NS were identified and categorized based on current histopathologic criteria either as TB or BCC. For comparison of histopathologic features, 37 solitary TB were also studied. RESULTS: Following histopathologic analysis, 22 cases were categorized as TB (91.6%, 10 males, 12 females; mean age 40.8 years, range 19-78 years) and 2 cases as BCC (8.4%, 1 male, 1 female; 32 years and 40 years). Clinical features in both groups were generally similar. The lesions presented exclusively on the head and neck as skin colored to pigmented papules or nodules within NS (scalp in 19 TB cases and 1 BCC case; face in 2 TB cases and 1 BCC case; neck in 1 TB case). Histopathologically, TB in NS were characterized by smooth-bordered basaloid aggregations with either a nodular and/or a superficial pattern, abundant fibrous stroma with focal clefts within the stroma, and prominent features of limited follicular differentiation (rudimentary follicular germs in concert with papillae). In contrast, BCC in NS showed basaloid aggregations that vary markedly in size and shape, scant fibrous stroma, focal mucinous clefts between basaloid aggregations and surrounding stroma, and lack of prominent rudimentary follicular germs in concert with papillae. Remarkably, sections in a few cases of TB showed features occasionally found in BCCs but presently widely considered to be unspecific (e.g., ulceration, cystic degeneration, and focal clefts between basaloid aggregations and surrounding stroma). Two cases of TB in NS were associated with a sebaceoma and 1 case with a desmoplastic trichilemmoma. Follow-up data in 14 TB cases and 2 BCC cases (mean follow-up 28.8 months; range 1 to 160 months) revealed no local recurrences or distant metastases. CONCLUSION: Our study confirms that the vast majority of the basaloid neoplasms arising in NS show clear-cut morphologic criteria for TB, whereas only a few cases display histopathologic features consistent with BCC. In a minority of cases, basaloid neoplasms with overall morphologic features of TB may present problems in diagnosis when they exhibit a few histopathologic features traditionally associated with BCC or when they occur in combination with other adnexal neoplasms.

Adolescent↗
PubMed2000

Extended extracorporeal photochemotherapy with extracorporeal administration of 8-methoxypsoralen in systemic sclerosis. An Austrian single-center study.

BACKGROUND: Extracorporeal photochemotherapy (EXP) is an immunomodulating therapy that has been used in a limited number of patients with systemic sclerosis (SSC) with controversial results. The present study was performed to evaluate the efficacy and safety of extended EXP with extracorporeal application of liquid 8-methoxypsoralen (8-MOP) in the treatment of SSC. METHODS: Eleven women with progressive SSC of recent onset were treated for a period of 16-57 months. Skin changes, physical performance, extracutaneous manifestations, and quality of life were evaluated before initiation of EXP and at regular intervals thereafter. RESULTS: From the start to the last set of EXP, we observed an overall improvement and/or stabilization of skin changes and physical performance in 5 of 11 patients (45%). Extracutaneous manifestations deteriorated in 10 of 11 patients (91%) (P<0.05), and quality of life deteriorated in 9 of 11 patients (82%) from a mean score of 10 before, to 17 at the last set of EXP (P<0.05). No major side effects were noted. CONCLUSION: Extended EXP with extracorporeal administration of 8-MOP is a safe and well tolerated treatment modality. However, it provides only (minor) improvement of skin changes of a subset of SSC patients and does not beneficially influence extracutaneous manifestations and quality of life.

Adult↗
PubMed2000

Dermatoscopy in the diagnosis of pigmented skin lesions: a new semiology for the dermatologist.

Dermatoscopy or epiluminescence microscopy (ELM), is a noninvasive method that enables clinicians to evaluate fully--by means of a magnified oil immersion diascopy--numerous morphological features, not visible with the naked eye, which enhance the diagnosis of nearly all pigmented skin lesions. In recent years, a burst of research activity in this topic has been carried out, dealing with different aspects, and new frontiers, of this technique. First, a continuous refinement of dermatoscopic terminology is undertaken, paying particular attention to the diagnostic performance of dermatoscopy at peculiar anatomical sites and to the building of different dermatoscopic algorithms aimed at a simplified diagnosis of melanoma, even for less experienced observers. Another point of interest concerns the possible role of dermatoscopy in the pre-operative assessment of melanoma thickness. Finally, promising data about the role of digital equipment in the follow up of melanocytic skin lesions as well as in the automated diagnosis of pigmented skin lesions have been recently reported. This paper should enable readers to become familiar with the procedure and terminology of ELM in the diagnosis of pigmented skin lesions encouraging a greater understanding of different methods (pattern analysis, algorithms) in the diagnosis of melanoma using ELM.

Algorithms↗