title: [Myelosarcoma as the 1st manifestation of myelosis].
abstract: Myelosarcoma of the nodes, middle ear, rib, and spinal epidural space was observed in five cases as preceding the diagnosis of myelosis. In two cases involving epidural localization malignant lymphoma was misdiagnosed and reclassification only at the time of postmortem. Myelosarcoma is best distinguished from other types of tumour by means of the histochemical proof of naphthol-AS-D-chloracetatesterase.
mesh_terms: D000328:Adult; D000368:Aged; D002648:Child; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D004432:Ear, Middle / Q000473:pathology; D004824:Epidural Space / Q000473:pathology; D005260:Female; D006651:Histocytochemistry; D006801:Humans; D007938:Leukemia / Q000175:diagnosis; D007951:Leukemia, Myeloid / Q000175:diagnosis; D008198:Lymph Nodes / Q000473:pathology; D008223:Lymphoma / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000175:diagnosis* / Q000201:enzymology; D012272:Ribs / Q000473:pathology
vernacular_title: Myelosarkom jako první projev myelózy.