@article{KreisslBockischDietleinetal.2014, author = {Kreissl, Michael C. and Bockisch, Andreas and Dietlein, Markus and Gr{\"u}nwald, Frank and Luster, Markus}, title = {Inconsistencies}, series = {Deutsches {\"A}rzteblatt International}, volume = {111}, journal = {Deutsches {\"A}rzteblatt International}, number = {16}, doi = {10.3238/arztebl.2014.0288a}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-119770}, pages = {288}, year = {2014}, abstract = {No abstract available.}, language = {en} } @article{BuderLapaKreissletal.2014, author = {Buder, Kristina and Lapa, Constantin and Kreissl, Michael C. and Schirbel, Andreas and Herrmann, Ken and Schnack, Alexander and Br{\"o}cker, Eva-Bettina and Goebeler, Matthias and Buck, Andreas K. and Becker, J{\"u}rgen C.}, title = {"Somatostatin receptor expression in Merkel cell carcinoma as target for molecular imaging"}, doi = {10.1186/1471-2407-14-268}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-110326}, year = {2014}, abstract = {Background Merkel cell carcinoma (MCC) is a rare cutaneous neoplasm with increasing incidence, aggressive behavior and poor prognosis. Somatostatin receptors (SSTR) are expressed in MCC and represent a potential target for both imaging and treatment. Methods To non-invasively assess SSTR expression in MCC using PET and the radiotracers [68Ga]DOTA-D-Phe1-Tyr3-octreotide (DOTATOC) or -octreotate (DOTATATE) as surrogate for tumor burden. In 24 patients with histologically proven MCC SSTR-PET was performed and compared to results of computed tomography (CT). Results SSTR-PET detected primary and metastatic MCC lesions. On a patient-based analysis, sensitivity of SSTR-PET was 73\% for nodal metastases, 100\% for bone, and 67\% for soft-tissue metastases, respectively. Notably, brain metastases were initially detected by SSTR-PET in 2 patients, whereas liver and lung metastases were diagnosed exclusively by CT. SSTR-PET showed concordance to CT results in 20 out of 24 patients. Four patients (17\%) were up-staged due to SSTR-PET and patient management was changed in 3 patients (13\%). Conclusion SSTR-PET showed high sensitivity for imaging bone, soft tissue and brain metastases, and particularly in combination with CT had a significant impact on clinical stage and patient management.}, language = {en} } @article{NeubauerHassoldWarmuthMetzetal.2014, author = {Neubauer, Henning and Hassold, Nicole and Warmuth-Metz, Monika and Winkler, Beate and Kreissl, Michael C. and Ernestus, Karen and Beer, Meinrad}, title = {Hit the mark with diffusion-weighted imaging: metastases of rhabdomyosarcoma to the extraocular eye muscles}, doi = {10.1186/1471-2431-14-57}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-110106}, year = {2014}, abstract = {Background Rhabdomyosarcoma is the most frequent malignant intraorbital tumour in paediatric patients. Differentiation of tumour recurrence or metastases from post-therapeutic signal alteration can be challenging, using standard MR imaging techniques. Diffusion-weighted MRI (DWI) is increasingly considered a helpful supplementary imaging tool for differentiation of orbital masses. Case presentation We report on a 15-year-old female adolescent of Caucasian ethnicity who developed isolated bilateral thickening of extraocular eye muscles about two years after successful multimodal treatment of orbital alveolar rhabdomyosarcoma. Intramuscular restricted diffusion was the first diagnostic indicator suggestive of metastatic disease to the eye muscles. DWI subsequently showed signal changes consistent with tumour progression, complete remission under chemoradiotherapy and tumour recurrence. Conclusions Restricted diffusivity is a strong early indicator of malignancy in orbital tumours. DWI can be the key to correct diagnosis in unusual tumour manifestations and can provide additional diagnostic information beyond standard MRI and PET/CT. Diffusion-weighted MRI is useful for monitoring therapy response and for detecting tumour recurrence.}, language = {en} }