Hydration Status of Junior Tennis Players and the Difference after a Lecture on Its Practice.

Dehydration reduces exercise performance and causes heat-related illness. However, the fact that dehydration is a serious sports injury is often forgotten, especially among junior tennis players, who engage in tennis matches alone without receiving advice from others. Our objective was to investigate the hydration status of junior tennis players and the difference after attending a lecture on the importance of hydration.

Extracorporeal shockwave therapy for the treatment of scaphoid delayed union in a tennis player: A case report.

Operative procedures are considered the gold standard when treating delayed union or non-union of the scaphoid despite their considerable complexity and the risk of intraoperative complications. Although extracorporeal shockwave therapy has been reported as a non-invasive treatment option for non-union cases, only a few papers on delayed union or non-union of the scaphoid have been published. A 57-year-old man with delayed union of a scaphoid fracture was treated with extracorporeal shockwave therapy and showed complete bone healing with promising results two months after the start of treatment without undergoing surgery.

Prospective study and multivariate analysis of the incidence of C5 palsy after cervical laminoplasty.

Study Design: A prospective comparative study about the incidence of postoperative C5 palsy and multivariate analysis of the risk factors of C5 palsy.

Objective: To clarify the risk factors of occurrence of C5 palsy after laminoplasty (LP) by comparing the 2 surgical procedures of open-door and double-door LP prospectively.

Summary Of Background Data: The incidence of C5 palsy has been reported to average 4.

Use of a midline anterior incision for isolated medial tibial plateau fractures.

A technique using an anterior midline incision with a medial parapatellar arthrotomy and a medial full-thickness skin flap for the open reduction and internal fixation of isolated medial tibial plateau fractures is presented. The approach is advocated as an alternative to a posteromedial approach when medial tibial plateau fractures are present alone. The anterior approach is simple and familiar for orthopaedic surgeons.

Superior pubic ramus fractures fixed with percutaneous screws: what predicts fixation failure?

Objective: The purpose of this study is to present the early complications of percutaneous screw fixation of superior pubic ramus fractures and to present a new classification scheme for superior pubic ramus fractures.

Design: Retrospective.

Setting: Level 1 trauma center.

Establishment and characterization of a KIT-positive and stem cell factor-producing cell line, KTHOS, derived from human osteosarcoma.

Osteosarcoma is a malignant bone tumor that commonly affects adolescents and young adults. In the present study a human osteosarcoma cell line, KTHOS, was established from a primary osteosarcoma lesion in the distal femur of a 16-year-old girl. After 106 passages, the KTHOS cell line retained the biological characteristics of osteosarcoma.

Inhibitory effect of STI571 on cell proliferation of human malignant fibrous histiocytoma cell lines.

Background: Malignant fibrous histiocytoma (MFH) is one of the most common high-grade sarcomas in bone and soft tissue and, due to its chemo-resistance, the prognosis of the disease is poor. ST1571 is a tyrosine kinase inhibitor that was initially developed as a BCR/ABL inhibitor for chronic myeloid leukemia patients. STI571 also selectively inhibits platelet-derived growth factor receptors (PDGFRs) and c-kit.

Expression of transforming growth factor beta isoforms and their receptors in malignant fibrous histiocytoma of soft tissues.

Purpose: Transforming growth factor beta (TGF-beta) is a multifunctional growth factor that variably affects proliferation, differentiation, and extracellular matrix formation. Little information is currently available on the TGF-beta expression in malignant fibrous histiocytoma (MFH). The aims of the present study were to investigate the expression of TGF-beta isoforms and their receptors in human MFH specimens.

Expression of betacellulin, heparin-binding epidermal growth factor and epiregulin in human malignant fibrous histiocytoma.

Background: Heparin-binding epidermal growth factor (HB-EGF), betacellulin (BTC) and epiregulin (EPR) are members of the EGF system and involved in the cell growth of various epithelial malignancies. There have been no reports on the HB-EGF, BTC and EPR expression in mesenchymal malignancies of fibrohistiocytic origin including malignant fibrous histiocytoma (MFH).

Materials And Methods: We investigated the expression of HB-EGF, BTC, EPR and EGF-receptor (EGF-R) in 43 human MFH tissue samples using immunohistochemical techniques.

Phalangeal microgeodic syndrome resulting in rapid digital shortening.

Microgeodic phalangeal syndrome is a rare condition affecting the fingers in children. Radiographically, the affected phalanges show sclerosis with multiple small areas of osteolysis. The pathogenesis of microgeodic phalangeal syndrome is considered to be a transient disturbance of the peripheral circulation caused by cold temperatures.

Coexpression of hepatocyte growth factor and its receptor c-Met correlates with high MIB-1 proliferative index in malignant fibrous histiocytoma.

Hepatocyte growth factor (HGF) is a multifunctional cytokine that variably affects cell motility, proliferation, and morphogenesis. Little information is currently available on the HGF and its receptor c-Met expression in malignant fibrous histiocytoma (MFH). We immunohistochemically investigated the HGF and c-Met expression in 43 MFH tissue specimens.

Apophysitis of the ischial tuberosity mimicking a neoplasm on magnetic resonance imaging.

We present multimodality imaging features of an ischial tuberosity apophysitis in a 13-year-old boy who was an active baseball pitcher. Roentgenography of the pelvis and computed tomography showed mild irregularity in the inferior margin of the left ischial tuberosity. T1-weighted MRI showed a wide area with low signal intensity in the left ischial body; T2-weighted fat-suppression images showed areas with markedly high signal intensity in the ischial apophysis and body and the surrounding periosteum; contrast-enhanced T1-weighted fat-suppression MRI showed that the ischial body, surrounding periosteum, and origin of the hamstring muscles strongly enhanced; technetium-99m scintigraphic scans showed increased isotope uptake in the entire ischial body.

Amphiregulin and epidermal growth factor receptor expression in human malignant fibrous histiocytoma of soft tissues.

Background: Amphiregulin is a member of the epidermal growth factor (EGF) system and a potent mitogen for various epithelial tissues. Little information, however, is currently available on the amphiregulin and EGF receptor (EGF-R) expression in mesenchymal malignancies of a fibrohistiocytic origin including malignant fibrous histiocytoma (MFH).

Materials And Methods: We investigated the amphiregulin and EGF-R expression in 43 human MFH tissues using immunohistochemical techniques.

Periosteal osteoblastoma of the distal femur.

Osteoblastomas located on the surface of the cortical bone, so-called periosteal osteoblastomas, are extremely rare. We report on a case of periosteal osteoblastoma arising from the posterior surface of the right distal femur in a 17-year-old man. Roentgenographic, computed tomographic, magnetic resonance imaging, and histologic features of the case are presented.

Immunohistochemical analysis of platelet-derived growth factor and its receptors in soft tissue malignant fibrous histiocytoma.

Background: Little information is available regarding the expression of platelet-derived growth factor (PDGF) isoforms and their receptors in soft tissue malignant fibrous histiocytoma (MFH).

Materials And Methods: We investigated expression of PDGF isoforms and their receptors (PDGF-R alpha and -R beta) in 43 MFH tissue specimens using immunohistochemical techniques. Furthermore, we examined the correlation of PDGF expression in MFHs with proliferative activity assessed by MIB-1 immunohistochemical staining.

Expression of stem cell factor and lack of c-kit expression in malignant fibrous histiocytoma of soft tissues.

Background: Little information is available on the expression of stem cell factor (SCF) and its receptor c-kit in soft tissue tumors of a fibrohistiocytic origin, including malignant fibrous histiocytoma (MFH).

Materials And Methods: We investigated the endogenous expression of SCF and c-kit in 43 MFH tissue samples using immunohistochemical techniques. Furthermore, we examined the correlation of SCF expression in MFHs with proliferative activity assessed by mitotic indices and MIB-1 immunohistochemical staining.

Expression of stem cell factor and c-kit in human malignant fibrous histiocytoma cell line (TNMY1).

Background: The expression of c-kit and/or its ligand, stem cell factor (SCF), has been related to tumor proliferation, in several tumor systems.

Materials And Methods: We analyzed the expression of the SCF/its receptor (c-kit) mRNA and the production of soluble SCF in a human malignant fibrous histiocytoma (MFH) cell line (TNMY1).

Results: Immunocytochemical analysis revealed that the TNMY1 cells were positive for both SCF and c-kit.

Management of liposarcoma occurring in pregnant women.

Background: The coexistence of pregnancy and liposarcoma is rare. Only 12 cases of pregnancy-associated liposarcoma have previously been reported in the English-language literature.

Materials And Methods: We present two cases of liposarcoma occurring in pregnant patients: one myxoid liposarcoma in a 29-year-old woman at 29 weeks' gestation; another well-differentiated liposarcoma in a 44-year-old woman at 22 weeks' gestation.

Fine-needle aspiration biopsy in the initial diagnosis of bone lesions.

Background: The diagnostic role of fine-needle aspiration biopsy (FNAB) of bone lesions is not yet fully understood. The aim of this study was to examine the diagnostic accuracy and reliability of FNAB of bone lesions.

Materials And Methods: FNAB smears of 73 lesions obtained from 70 patients with bone lesions were retrospectively reviewed randomly, combined with clinical and radiological findings.

A true intra-articular lipoma of the knee in a girl.

A 16-year-old girl presented with a soft-tissue mass in the anterolateral aspect of her right knee. Magnetic resonance imaging revealed an intra-articular tumor arising from the anterior fat pad of the knee. The tumor showed low signal intensity on T1-weighted images and high signal intensity on T2-weighted images.

MRI-negative rotator cuff tears.

We report two cases of rotator cuff tear in which the T(2)-weighted MRI signal was negative at the first examination, but positive by the second examination without any changes in symptoms. Many authors have reported on correlations between the MRI and operative findings of rotator cuff tears. However, MRI findings, history of symptoms and operative findings in our patients suggest that there was a discrepancy between symptoms and MRI findings dependent on the period from the injury.

Mechanical stretching force promotes collagen synthesis by cultured cells from human ligamentum flavum via transforming growth factor-beta1.

Although mechanical stress as a result of spinal instability is known to cause hypertrophy of the ligamentum flavum resulting in degenerative spinal canal stenosis, the mechanism of the ligament hypertrophy is not well understood. In the present study, we investigated the effect of mechanical stretching force on collagen synthesis and transforming growth factor-beta1 (TGF-beta1) production using ligament cells isolated from human ligamentum flavum in vitro. Ligamentum flavum cells (LFCs) were isolated from human ligamentum flavum obtained from patients who underwent lumbar spine surgery.