Aggressive systemische Mastozytose mit erhöhter diffuser 18F-FDG-Aufnahme im Knochenmark [Aggressive systemic mastocytosis with diffuse bone marrow 18F-FDG uptake]

Mastocytosis is a clonal hematopoietic disorder characterized by proliferation of abnormal mast cells in various organs including the skin, digestive system, lymph nodes, and bone marrow. We report on a 75-year-old woman presenting with abdominal pain, vomiting, diarrhoea, myalgia, and weight loss. Abdominal CT showed hepatosplenomegaly with heterogeneous splenic parenchyma, lymphadenopathy, and osteopenia with areas of osteosclerosis but no primary tumour. An <sup>18</sup> F-FDG PET/CT revealed an overall low metabolic activity of the lesions with a diffuse bone marrow involvement raising suspicion of a haematological neoplasm. Subsequently, bone marrow and peripheral blood examinations confirmed the diagnosis of aggressive systemic mastocytosis

PULSED RUBY-LASER ACCELERATED DEGRADATION OF AMORPHOUS HYDROGENATED SILICON

We introduce the pulsed ruby laser as a new tool for omogeneous accelerated degradation of a-Si:H and discuss in detail the sample temperature during the ruby pulse and the value of the saturated density of states (DOS), achieved by this laser. The degradation dynamics and the saturated values of the DOS and electrical room temperature conductivity (sigma(RT)) are presented on a set of different undoped a-Si:H samples. It is illustrated that there is no correlation between the initial and light-saturated DOS, which is determined in addition to the H content and the a-Si:H microstructure indirectly also by impurities