Ken Wada

Bone Mineral Density of Radius (DEXA Method) and Compression Fractures of Spine

729 females over 40 years old were studied for bone mineral density of the radius (DEXA method) and X-rays of the spine.The incidence of vertebral fractures increases with age and as the bone mineral density (BMD) decreases.The BMD average with vertebral fractures was significantly low.While the BMD of the distal radius show correlation with vertebral fractures, it cannot serve as the single method for diagnosing osteoporosis.

Primary Musculoskeletal Tumors: Examination with MR Imaging Compared with CT

Sixteen patients with new or recurrent primary tumors of bone or soft tissues underwent both magnetic resonance imaging (MRI) and computed tomography (CT). The neoplasms arose in osseus tissue in ten and in soft tissue in six individuals: MRI was judged superior to CT in the majority of cases. The major reason was the greater contrast between neoplasm and adjacent normal tissue and the extent of abnormal bone marrow. Judging the relation of tumors to vital structures, such as blood vessels or nerves, MRI is generally superior to CT. CT scan shows the relationship between the tumor and the neighboring structures in greater detail, but the exact borders between tumor, possible surrounding edema or inflammatory tissue and normal muscles could not be defined. On the other hand, MRI shows the exact relationship between them, clearly separated by edematous or reactive tissues.

Chondrodysplasia punctata - Long term follow up of 3 cases.

Chodrodysplasia punctata is a very rare disease, and was first described by Conradi in 1914. Almost 200 cases have been reported in the world, and 33 cases in Japan.The essential feature of this condition is the presence of stippled foci of calcification within the hyaline cartilage in infancy. And this disease is frequently associated with multiple congenital abnormalities, as cataract, saddle nose, follicular atrophoderma, contractures of joints, dwarfing of the limbs, kyphoscoliosis, mental retardation, etc.Three cases of Conradi-Hunermann type of chondrodysplasia punctata, diagnosed in infancy, are presented. They were followed for about 10 years.