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Inflammatory myofibroblastic tumors are a neoplastic lesions consisting mainly of myofibroblast proliferation, accompanied by marked infiltrations of inflammatory cells (e.g., lymphocytes and plasma cells); they rarely occur in the jawbone. We describe an inflammatory myofibroblastic tumor that occurred in the anterior mandible and was suspected to be malignant. The patient, a 47-year-old Japanese woman, went to a dentist because of pain in a mandibular anterior tooth. The tooth was extracted due to severe mobility, but after a failure of healing, the patient was referred to our hospital. Compressive bone resorption in the anterior mandible and swelling of both submandibular lymph nodes were observed. Antibiotics were administered, but due to enlargement, a malignant tumor was suspected. FDG-PET and a biopsy were performed. Based on the diagnosis of inflammatory myofibroblastic tumor, tumor resection was performed (general anesthesia). The patient is well at 3 years postsurgery without recurrence or metastasis.

Low-density InAs quantum dots (QDs) with a large lateral size were grown on InP(001) by solid-source molecular beam epitaxy with a post-growth annealing process. A decrease in QD density with the amount of InAs deposited was shown by atomic force microscopy, and a density of $5\times 10^{8}$ QDs/cm2was obtained for 0.8 monolayer InAs deposition. Moreover, we found that the growth mechanism of QDs changed significantly depending on the amount of InAs deposited in the vicinity of critical thickness, even if the same annealing condition was applied. Near-field photoluminescence spectroscopy of single QDs demonstrated the high optical qualities of low-density QDs.