Recently, various implant cylinders were supplied, especially received gold cylinders, cast cylinders produced from premade gold and plastic cylinders and plastic cylinders. This study measured and compared precise fit produced when using conventional gold and plastic cylinders. The comparative fit of lapped and non-lapped castings made from plastic pattern was examined. The implant/abutment interface fit was evaluated by scanning electron microscopy(SEM) for each of four cylinders. The following results were obtained: 1. The case of plastic cylinder showed 9.67+/-1.50micrometer gap Steri-Oss fixture was connected. 2. The case oflapped casting made from plastic cylinder showed 3.01+/-2.81micrometer gap when Steri-Oss fixture was connected. 3. The case of gold/plastic cylinder showed 9.80+/-1.68micrometer gap when Steri-Oss fixture was connected. 4. The case of gold cylinder showed 5.47+/-2.43micrometer gap when Steri-Oss fixture was connected. 5. In case of each cylinder which was connected with Steri-Oss fixture, the size of gap was showed less in the order of the case of gold/plastic cylinder, the case of plastic cylinder, the case of gold cylinder and the case of lapped casting made from plastic cylinder. As results of this study, the use of premade gold cylinder offers an advantage over plastic patterns in precise fit. When plastic patterns are used, polishing of implant cylinder components should provide precise fit.
Plastics* ; Prostheses and Implants*

Myxofibrosarcomas (MFSs), which consist of multiple nodules with a variable cellular population in a myxoid matrix, are primarily located in subcutaneous tissue. Pleomorphic hyalinizing angiectatic tumors (PHATs) are rare soft-tissue tumors characterized by a proliferation of highly pleomorphic spindle or polygonal cells and abundant ectatic blood vessels in cellular or myxoid stroma. We present here an unusual case of a high-grade MFS with a PHAT-like appearance. A 67-year-old man presented with an asymptomatic subcutaneous mass in the right forearm. The tumor had myxoid, hypo-, and hypercellular areas with highly pleomorphic spindle or polygonal tumor cells that showed frequent mitoses and nuclear pseudoinclusions. Foci of punctuate necrosis and inflammatory infiltration were present throughout the tumor, and abundant ectatic, thick-walled vessels containing blood clots were noted. The tumor cells were immunohistochemically positive for vimentin but negative for CD34, S-100 protein, smooth muscle actin, desmin, and bcl-2.
Actins ; Aged ; Blood Vessels ; Desmin ; Forearm ; Humans ; Hyalin ; Mitosis ; Muscle, Smooth ; Necrosis ; S100 Proteins ; Sarcoma ; Subcutaneous Tissue ; Vimentin

No abstract available.
Interleukin-2*

Three cases of hydatidiform mole with a coexisting fetus are described. In two cases, flow cytometric analysis of nuclear DNA content from paraffin-embedded, molar tissues and normal-appearing placental tissues showed diploid pattern. One case had karyotypes of 46, XX both in fetal skin fibroblasts and in molar tissues. Microscopically, the villi showed diffuse hydropic swelling with circumferential trophoblastic proliferations and consistent with the diagnosis of complete mole. Two patient had persistent gestational trophoblastic neoplasia on the follow-up. Therefore, in cases of hydatidiform mole with a coexisting fetus, dizygotic twin pregnancies composed of a normal pregnancy from one ovum and a complete mole pregnancy from the other ovum must be considered and the patients should be followed with serum beta-hCG measurements.
Pregnancy ; Female ; Humans

Ki-1 monoclonal antibody is a well known marker for Reed-Sternberg cells in Hodgkin's disease, but also occasionally reacts with activated lymphoid cells of either benign or malignant nature. Recently, Ki-1 antibody positive Non-Hodgkin's lymphoma, usually of large cell and/or polymorphous type, has been reported in the lymph nodes, skin, soft tissue, and stomach, but not in the bone. We report a case of multifocal primary bone lymphoma in a seven-year old body involving the left shoulder and right frontal bone, which proved to be a large cell, polymorphous lymphoma, helper T-cell type expressing Ki-1 antigen.
Child ; Male ; Female ; Humans

No abstract available.
Progeria*

No abstract available.

Cytophagic histiocytic panniculitis is a rescently described histiocytic disorder. It is characterized by the presence of fever, pancytopenia, and subcutaneous nodules resulting from the infiltration of lympho-histiocytes in the dermis and subcutaneous adipose tissue. The characteristic findings is presence of bean-bag histiocytes containing phagocytized red blood cells, lymphocytes, and platelets. We experienced two cases of cytophagic histiocytic panniculitis with hard and erythematous subcutaneous nodules. These skin lesions exhibited infiltration of the subcutaneous tissue by large, benign histiocytes with cytophagic features. Hemophagocytic histiocytes were observed in the cervical lymph node in case 1, and bone marrow in case 2. One patient is alive, while the other one died with hemorrhagic complications.

A wide range of denomination has been used for inflammatory myofibroblastic tumor (IMT). IMT is not entirely homogeneous, even though it shows some overlapping histologic features such as haphazard proliferation of spindle cell and polymorphic chronic inflammatory cell infiltraion. The spindle cell is considered to be of myofibroblastic origin but follicular dendritic cell origin was reported recently. IMT is known as nonneoplastic, aberrant inflammatory response. However, IMT could show local invasion, recurrence, vascular invasion, and malignant transformation, and clonal characteristics and aneuploidy of IMT support the hypothesis that IMT may be a neoplastic process. In order to define the nature of spindle cell of IMT, immunohistochemical stains for smooth muscle actin (SMA), vimentin (VMT), lysozyme, S-100 protein, cytokeratin, CD21 were done. Additional immunohistochemical stains for MIB-1 for proliferating activity and LMP (latent membrane protein) for Epstein-Barr virus (EBV) were done. IMTs were composed of each 2 cases from lung, liver and lymph node and one case from common bile duct, maxillary sinus, bladder and thigh, and were histologically subclassified according to Coffin et al. Nine cases (90%) were positive for SMA and VMT, but no correlation between SMA and VMT immunoreactivity and histologic types was identified. Five cases (50%) were positive for lysozyme and S-100 protein, and histologic type III was negative for lysozyme and S-100 protein, and immunoreactivity for S-100 protein was different according to the histologic subtypes. All 11 cases were negative for CD21 and EBV LMP. MIB-1 labelling index was less than 1% in all cases. In summary, the spindle cell is regarded as myofibroblastic origin rather than follicular dendritic cell origin. Relationship with EBV is not clear, and negligible MIB-1 reaction suggests that IMT might have a good prognosis.
Actins ; Aneuploidy ; Coloring Agents ; Common Bile Duct ; Dendritic Cells, Follicular ; Herpesvirus 4, Human ; Immunohistochemistry ; Keratins ; Liver ; Lung ; Lymph Nodes ; Maxillary Sinus ; Membranes ; Muramidase ; Muscle, Smooth ; Myofibroblasts* ; Prognosis ; Recurrence ; S100 Proteins ; Thigh ; Urinary Bladder ; Vimentin

We report an autopsy case of amniotic band syndrome exhibiting microcephaly, asymmetric encephalocele, microphthalmia, nasal deformity, cleft lip and palate accompanied by left maxillary and zygomatic bone deformities. The amniotic membrane of the placenta was also attached to the herniated brain. The twenty-year-old primigravid mother had no history of taking drug, irradiation, infection or trauma before or during pregnancy.
Pregnancy ; Female ; Humans