TY  - JOUR
A1  - Wobser, Marion
A1  - Roth, Sabine
A1  - Appenzeller, Silke
A1  - Houben, Roland
A1  - Schrama, David
A1  - Goebeler, Matthias
A1  - Geissinger, Eva
A1  - Rosenwald, Andreas
A1  - Maurus, Katja
T1  - Targeted deep sequencing of mycosis fungoides reveals intracellular signaling pathways associated with aggressiveness and large cell transformation
JF  - Cancers
N2  - Introduction: Large-cell transformation (LCT) of mycosis fungoides (MF) has been associated with a higher risk of relapse and progression and, consequently, restricted prognosis. Its molecular pathogenesis has not been elucidated yet. Materials and Methods: In order to address molecular mechanisms of LCT, we performed hybrid capture panel-based sequencing of skin biopsies from 10 patients suffering from MF with LCT versus 17 patients without LCT including follow-up biopsies during clinical course, respectively (51 samples in total). The analyzed patients were attributed to three different groups based on the presence of LCT and clinical behavior. Results: While indolent MF cases without LCT did not show pathogenic driver mutations, a high rate of oncogenic alterations was detected in patients with LCT and aggressive clinical courses. Various genes of different oncogenic signaling pathways, including the MAPK and JAK-STAT signaling pathways, as well as epigenetic modifiers were affected. A high inter-individual and distinctive intra-individual mutation diversity was observed. Oncogenic RAS mutations were exclusively detected in patients with LCT. Conclusion: Our data demonstrate that LCT transition of MF is associated with increased frequency of somatic mutations in cancer-associated genes. In particular, the activation of RAS signaling — together with epigenetic dysregulation — may crucially contribute to the molecular pathogenesis of the LCT phenotype, thus conveying its adverse clinical behavior.
KW  - mycosis fungoides
KW  - cutaneous T-cell-lymphoma
KW  - panel sequencing
KW  - large cell transformation
KW  - CD30
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-250094
SN  - 2072-6694
VL  - 13
IS  - 21
ER  - 
TY  - JOUR
A1  - Gaiser, Timo
A1  - Geissinger, Eva
A1  - Schattenberg, Torsten
A1  - Scharf, Hanns-Peter
A1  - Dürken, Matthias
A1  - Dinter, Dietmar
A1  - Rosenwald, Andreas
A1  - Marx, Alexander
T1  - Case report: a unique pediatric case of a primary CD8 expressing ALK-1 positive anaplastic large cell lymphoma of skeletal muscle
JF  - Diagnostic Pathology
N2  - Primary involvement of skeletal muscle is a very rare event in ALK-1 positive anaplastic large cell lymphoma (ALCL). We describe a case of a 10-year old boy presenting with a three week history of pain and a palpable firm swelling at the dorsal aspect of the left thigh. Histological examination of the lesion revealed a tumoral and diffuse polymorphic infiltration of the muscle by large lymphoid cells. Tumor cells displayed eccentric, lobulated "horse shoe" or "kidney-shape" nuclei. The cells showed immunohistochemical positivity for CD30, ALK-1, CD2, CD3, CD7, CD8, and Perforin. Fluorescence in situ hybridization analysis revealed a characteristic rearrangement of the ALK-1 gene in 2p23 leading to the diagnosis of ALK-1 positive ALCL. Chemotherapy according to the ALCL-99-NHL-BFM protocol was initiated and resulted in a complete remission after two cycles. This case illustrates the unusual presentation of a pediatric ALCL in soft tissue with a good response to chemotherapy.
KW  - pediatric lymphoma
KW  - psoas muscle
KW  - classification
KW  - translocation
KW  - features
KW  - gene
KW  - ALK-1
KW  - anaplastic large cell lymphoma
KW  - CD30
Y1  - 2012
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-135381
VL  - 7
IS  - 38
ER  -