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Myeloid sarcoma (MS) is a myeloblast-derived neoplasm that develops in areas other than the bone marrow, and MS associated with chronic myelomonocytic leukemia (CMML) has rarely been reported. Documentation of the initial symptoms of myeloid sarcoma in the oral cavity is also extremely rare. Most cases of osteonecrosis of the jaw (ONJ) have been reported to be iatrogenic, with origins such as osteoradionecrosis and treatment with bisphosphonates. We provide herein the first case report of MS with osteonecrosis of the mandible as a clinical manifestation of acute transformation of CMML. The patient was a 39-year-old Japanese man in whom necrosis of the mandibular bone marrow was caused by a rapid proliferation of myeloblasts. Patients with hematological disorders should always be monitored for the appearance of oral lesions, and thorough examinations and oral hygiene management may be necessary to prevent the exacerbation of infection. [ABSTRACT FROM AUTHOR]

Low-grade myofibroblastic sarcoma (LGMS) is a rare sarcoma characterized by myofibroblastic differentiation. LGMS can occur at various sites on the body but frequently occurs in the head and neck region, particularly the tongue. LGMS occurs in younger individuals compared to other tumors, but few LGMS cases have developed in early childhood. Wide excision is the first choice; there are a few reports of cases treated by chemotherapy and radiation therapy. Here we describe an extensive LGMS centering on the mandible of a Japanese male who was 1 year and 9 months old at his presentation. We successfully treated his LGMS by a combination of chemotherapy, radiotherapy and surgery. [ABSTRACT FROM AUTHOR]

Abstract: Nuclear magnetic resonance and relaxation measurements of the 59Co nuclei for the well-defined field-aligned powder of the triangular lattice superconductor Na x CoO2 · yH2O with a nearly optimal composition for the transition temperature T c have been performed. Detailed analyses indicate that the Knight shifts for the directions parallel and perpendicular to the CoO2 plane and the spin-lattice relaxation rates, taken by making an inevitable deterioration of specimen minimal, are significantly smaller than most of the data reported to date, and that this compound is classified into one of the unconventional spin-singlet superconductors as suggested by recent works for single crystals with a lower T c. A small enhancement of two-dimensional antiferromagnetic spin correlations at some nonzero wave vector may emerge near T c. [Copyright &y& Elsevier]