92 research outputs found
Free field approach to diagonalization of boundary transfer matrix : recent advances
We diagonalize infinitely many commuting operators . We call these
operators the boundary transfer matrix associated with the quantum
group and the elliptic quantum group. The boundary transfer matrix is related
to the solvable model with a boundary. When we diagonalize the boundary
transfer matrix, we can calculate the correlation functions for the solvable
model with a boundary. We review the free field approach to diagonalization of
the boundary transfer matrix associated with and
. We construct the free field realizations of the
eigenvectors of the boundary transfer matrix . This paper includes new
unpublished formula of the eigenvector for . It is thought that
this diagonalization method can be extended to more general quantum group
and elliptic quantum group .Comment: To appear in Group 28 : Group Theoretical Method in Physic
Light- and Electron- microscopic and Immunohistochemical Studies of Human Rhabdomyosarcomas. Comparisons Among Primary Tumors, Heterotransplants in Nude Mice, and Cultured Cells from 13 Patients
Eighteen human rhabdomyosarcomas (RMS) were transplanted into the sub-cutaneous space on the back of nude mice. Thirteen of the tumors gave rise to transplantable tumors that were further examined morphologically and immuno-histochemically. The morphology of the transplanted tumors was similar to that of the primary tumors. Immunohistochemically, five primary tumors and six transplanted tumors were reacted with both desmin and myoglobin. However, in eleven cases cultured cells derived from the transplanted tumors, which showed elongated to strap-spindle-shaped cytoplasm resembling myotubules, reacted more intensely with both myoglobin and desmin. On ultrastructural examination, six primary tumors and seven transplanted tumors were found to have myofilaments or Z-bands. However, cultured cells showed myofilaments or Z-bands in their cytoplasm in all cases examined. We concluded that, on xeno-grafting, the histologic characteristics of the primary tumor are essentially con-served, and that tumor cells under culture conditions undergo an increased differentiation of skeletal muscle. These human RMS strains in nude mice and in cell lines will provide an excellent model system for investigating the biology of RMS and for further study of the molecular events underlying the genesis of this tumor
Significant benefits of AIP testing and clinical screening in familial isolated and young-onset pituitary tumors
Context
Germline mutations in the aryl hydrocarbon receptor-interacting protein (AIP) gene are responsible for a subset of familial isolated pituitary adenoma (FIPA) cases and sporadic pituitary neuroendocrine tumors (PitNETs).
Objective
To compare prospectively diagnosed AIP mutation-positive (AIPmut) PitNET patients with clinically presenting patients and to compare the clinical characteristics of AIPmut and AIPneg PitNET patients.
Design
12-year prospective, observational study.
Participants & Setting
We studied probands and family members of FIPA kindreds and sporadic patients with disease onset ≤18 years or macroadenomas with onset ≤30 years (n = 1477). This was a collaborative study conducted at referral centers for pituitary diseases.
Interventions & Outcome
AIP testing and clinical screening for pituitary disease. Comparison of characteristics of prospectively diagnosed (n = 22) vs clinically presenting AIPmut PitNET patients (n = 145), and AIPmut (n = 167) vs AIPneg PitNET patients (n = 1310).
Results
Prospectively diagnosed AIPmut PitNET patients had smaller lesions with less suprasellar extension or cavernous sinus invasion and required fewer treatments with fewer operations and no radiotherapy compared with clinically presenting cases; there were fewer cases with active disease and hypopituitarism at last follow-up. When comparing AIPmut and AIPneg cases, AIPmut patients were more often males, younger, more often had GH excess, pituitary apoplexy, suprasellar extension, and more patients required multimodal therapy, including radiotherapy. AIPmut patients (n = 136) with GH excess were taller than AIPneg counterparts (n = 650).
Conclusions
Prospectively diagnosed AIPmut patients show better outcomes than clinically presenting cases, demonstrating the benefits of genetic and clinical screening. AIP-related pituitary disease has a wide spectrum ranging from aggressively growing lesions to stable or indolent disease course
Periprosthetic acetabular bone loss using a constrained acetabular component
This is the author-created version of Springer, Ito, Hiroshi ; Matsuno, Takeo,Archives of Orthopaedic and Trauma Surgery, 124(2), 2004, 137-139. The original publication is available at www.springerlink.com.
authorWe describe two patients with a constrained acetabular component who required treatment for recurrent dislocation showing postoperative periprosthetic acetabular bone loss. These hips required revision surgery and demonstrated considerable bone loss caused by the migrated acetabular component. Impingement may have occurred with increased stress at the bone-prosthesis interface, and the sharp ends of screws with a metal shell may have gradually plowed up the acetabular bone. These failures illustrate the potential risk of using a constrained acetabular component
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