Michael Bär

City Hospital Görlitz, Goerlitz, Saxony, Germany

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Publications (6)4.05 Total impact

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    ABSTRACT: Trichilemmal cysts can occur as multiple scalp lesions and may have a familial history. Metaplastic ossification, as seen in several traumatic, inflammatory or neoplastic conditions, however, seems to be an exceedingly rare event in trichilemmal cysts and might be associated with previous rupture.
    Der Pathologe 05/2012; 33(5):459-62. · 0.62 Impact Factor
  • Michael Bär, Norbert Grunow
    Journal der Deutschen Dermatologischen Gesellschaft 05/2012; 10(7):521-3. · 1.40 Impact Factor
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    ABSTRACT: It is unclear whether pigmented Spitz and Reed nevi are distinct morphologic entities or part of the spectrum of Spitz nevi. In a retrospective observational study we analyzed dermatopathologic slides of 22 cases with clinical and dermatoscopic features indicative of pigmented Spitz or Reed nevus in a blinded fashion according to predefined criteria and subsequently correlated dermatopathologic with clinical and dermatoscopic findings. We differentiated pigmented Spitz and Reed nevus dermatopathologically by their capacity of melanin production and a vertical versus horizontal growth pattern. Based on histopathology 20 nevi (91%) could be reliably diagnosed as Reed nevus (68%, n=15) or as pigmented Spitz nevus (23%, n=5). In two cases (9%, n=2) it was not possible to make a clear distinction from a dermatopathologic point of view. Dermatopathologic-dermatoscopic correlation showed that Reed nevi were characterized by a dermatoscopic pattern of peripheral radial lines or pseudopods (fascicular growth pattern), whereas pigmented Spitz nevi were typified by a pattern consisting of clods (nested growth pattern). "Spitz cells" (large epithelioid melanocytes) were more commonly found in Spitz nevi (100%, n = 5) but were also present in Reed nevi (n=6, 40%). Spindle cells were found in both types of nevi. Pigmented Spitz and Reed nevi can be reliably distinguished based on their dermatopathologic and dermatoscopic patterns. The specific dermatopathologic patterns of pigmented Spitz and Reed nevi correspond well to their dermatoscopic patterns. The presence of "Spitz cells" or spindle cells should not be regarded as the decisive criterion to differentiate between these two entities.
    Dermatology practical & conceptual. 01/2012; 2(1):13-24.
  • Michael Bär, Norbert Grunow
    Journal der Deutschen Dermatologischen Gesellschaft 01/2012; 10(7). · 1.40 Impact Factor
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    ABSTRACT: We report on an exceedingly rare case of cutaneous and uterine leiomyomatosis in a 58-year-old Caucasian woman associated with ovarian cystadenoma and complete deletion of the fumarate hydratase gene. All patients and their family members with verified mutation have to be regularly screened for associated neoplasms, in particular papillary renal cell carcinoma (HLRCC, hereditary leiomyomatosis and renal cell cancer).
    Dermatology practical & conceptual. 01/2011; 1(1):25-7.
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    ABSTRACT: Trichilemmalzysten können multipel und familiär gehäuft insbesondere an der behaarten Kopfhaut auftreten. Eine metaplastische Ossifikation, wie sie gelegentlich in anderen traumatischen, entzündlichen oder neoplastischen Läsionen auftreten kann, scheint in Trichilemmalzysten jedoch ein extrem seltenes Ereignis zu sein, das offenbar mit einer vorausgehenden Ruptur assoziiert ist.
    Der Pathologe 33(5). · 0.62 Impact Factor