PURPOSE: We tried to reveal radiographic clues for the possibility of damages to the important structures, including the peroneal nerve and the anterior tibial artery, caused by a proximal interlocking screw with a medial to lateral oblique direction (ObML-PIS). MATERIALS AND METHODS: The length of the proximal tibiofiular joint (PTFJ) was measured from the tip of the fibular head to the end of PTFJ on the simple oblique radiographs of 22 cases of tibial intramedullary (IM) nailing. The center (O) of the IM nailing, from the tibial anterior cortex at the level of insertion of an ObML-PIS, was measured on the simple lateral radiographs. The angle POA (P: a point 10 mm anterior from the anterior fibular border, A: a point on the tangent line from the O point to the posteromedial cortex of the fibula) was measured on the MR axial view of 60 cases, and within this angle an ObML-PIS could injure the important anatomical structures. Transverse and 45-degree oblique diameters of the proximal tibia on the MR axial view were also measured. RESULTS: The PTFJ length was 18.5+/-3.3 mm and the O point was located at 15.3+/-3.4 mm posterior from the tibial anterior cortex. The angle POA was 21.4+/-6.2-67.8+/-6.7 degrees with medial to lateral oblique directions. The transverse diameter of the proximal tibia was 58.0+/-5.8 mm and the 45-degree oblique diameter was 50.7+/-6.2 mm. CONCLUSION: Special caution may be needed when we use an ObML-PIS because it is located at the level distal from the end of the PTFJ and within the POA angle, and the peroneal nerve and anterior tibial artery can possibly be severed.
Fracture Fixation, Intramedullary ; Head ; Joints ; Nails ; Peroneal Nerve ; Poa ; Tibia ; Tibial Arteries ; Tibial Fractures

Nonylphenol (NP) is a widespread environmental pollutant that has been shown to exert both toxic and estrogenic effects on mammalian cells. As the effects of NP on the reproductive system of adult male vertebrates are virtually unknown, we investigated not only the changes of reproductive hormone secretion in serum after chronic exposure to NP but also, in order to identify the site of its action, the reproductive hormone secretion in serum 48 hours after microinfusion of NP within hypothalamic preoptic area (POA). In the chronic exposure, the luteinizing hormone (LH), follicle stimulating hormone (FSH), and testosterone in serum were decreased but prolactin (PRL) concentrations were increased. The LH, FSH, and testosterone in serum were decreased through the direct infusion of NP into POA, while there was no difference in mean serum prolactin between NP and control groups. These observations suggest that NP as endocrine disruptor has modulatory effects on hypothalamo-pituitary-gonadalaxis and that the site of action of NP could be hypothalamic POA.
Adult* ; Animals ; Estrogens ; Ethanol ; Follicle Stimulating Hormone ; Humans ; Luteinizing Hormone ; Male* ; Poa ; Preoptic Area ; Prolactin* ; Rats* ; Testosterone* ; Vertebrates

Psoas abscess is caused by primary or secondary and most commonly results from direct extension of intraabdominal infections. Staphylococcus aureus is the most common organism for psoas abscess secondary to vertebral osteomyelitis. Tuberculosis, malnutrition, alcoholism, diabetes mellitus, bone marrow failure, and steroid use are responsible for compromise in host defense and consequent increase in the relative risk of psoas abscess. We report here a case of bilateral poas abscess developed in a 58 year old patient with relapsed plasmacytoma in pelvic cavity during chemotherapy.
Abscess ; Alcoholism ; Bone Marrow ; Diabetes Mellitus ; Drug Therapy ; Humans ; Intraabdominal Infections ; Malnutrition ; Middle Aged ; Multiple Myeloma* ; Osteomyelitis ; Plasmacytoma ; Poa ; Psoas Abscess* ; Staphylococcus aureus ; Tuberculosis