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Red bone marrow extension and increased central bone marrow activity were found in 21 patients with alcoholic liver disease investigated with scintigraphy of the reticuloendothelial system. The patients had no concurrent disease known to alter red bone marrow distribution. The bone marrow extension and the increased pelvic bone marrow activity may be explained as being secondary to a decreased radiocolloid uptake in the liver and could thus be a sign of decreased reticuloendothelial capacity.
Bibliographic references seem very controversial regarding the most appropriate anatomical area for bone mass estimation. Since some overlapping in the different bone mass measurements among normal and osteoporotic females has been observed, we have studied the bone mineral content of the pelvic bone through DEXA, and have correlated it with the total body bone mineral content, a highly discriminating measure, in order to observe whether pelvic bone mineral may be a useful measure in bone mass assessment. Pelvic and total body bone mineral values did not decrease until menopause in 104 normal premenopausal females aged 20 to 49 years. On the other hand, these values decreased in normal postmenopausal women (n = 44) aged 50 to 65 years (p < 0.001), with a 16% pelvic bone mineral content and an 11% total body bone mineral content decrease. Osteoporotic females (n = 30), showed lower values for both levels than normal postmenopausal ones (p < 0.001), with a 54% pelvic and a 24% total decrease. A 15% overlap was observed when pelvic values between normal postmenopausal and osteoporotic females were compared. The greater percentage decrease in pelvic BMC compared to total body bone mineral content and the lower overlap observed suggest that the pelvis may be an ideal anatomical area for bone mass evaluations.
Due to both its shape and its structural architecture, the mechanics of the pelvic bone are complex. In Finite Element (FE) models, these aspects have often been (over)simplified, sometimes leading to conclusions which did not bear out in reality. The purpose of this study was to develop a more realistic FE model of the pelvic bone. This not only implies that the model has to be three-dimensional, but also that the thickness of the cortical shell and the density distribution of the trabecular bone throughout the pelvic bone have to be incorporated in the model in a realistic way. For this purpose, quantitative measurements were performed on computer tomography scans of several pelvic bones, after which the measured quantities were allocated to each element of the mesh individually. To validate this FE model, two fresh pelvic bones were fitted with strain gages and loaded in a testing machine. Stresses calculated from the strain data of this experiment were compared to the results of a simulation with the developed pelvic FE model.
This study is based upon a new morphometric technique providing both size and shape variables. It has been applied to 189 pelvic bones of extant humans and African apes as well as to 13 hominid pelvic bones of various taxonomic status. The main aim of this work is to include such fossil bones in the same study in order to set a synthetic comparison of their shape in the light of the yardstick given by the African ape/human pelvic bone comparison. To do so, ratio diagrams are chosen because they are simple and very expressive tools with which to present such comparisons. Shape differences are very well illustrated and quantified by this technique. The ilium appears to be the most different of the three parts of the pelvic bone. Compared to these differences, discrepancies between fossil hominid and extant human bones are of a totally different scale. This shows the architectural unity related to the acquisition of bipedalism by hominids. It is nonetheless possible to detect two levels of difference. The first separates Australopithecus from Homo and could be seen as reflecting locomotor differences between both genera. The second splits both Homo erectus and Neanderthal from modern human pelvic bones. It appears from the hominid fossil record of pelvic bones that two periods of stasis exist and are separated by a period of very rapid evolution corresponding to the emergence of the genus Homo. We are of the opinion that the same could be true for the split between African ape and hominid lineages at the end of the Miocene.
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PURPOSE: To analyze the technical results and safety of preoperative embolization of pelvic bone tumors. MATERIALS & METHODS: Retrospective study analysis of a cohort of patients who underwent preoperative hypervascular, pelvic bone tumor embolization at the authors' institution between January 2008 and January 2025. Preinterventional data, including clinical, radiological, and laboratory findings, procedural angiographic and surgical data, and clinical follow-up data were collected from the patients' electronic medical records. Patient follow-ups were conducted until March 2025 or until the patient's death. RESULTS: Twenty-three patients (11 male patients; mean age of 42 years) underwent uneventful , preoperative embolization for primary (n=15) or metastatic (n=8) pelvic bone tumor resection. A mean of 2.3 tumor feeding arteries were preoperatively embolized with complete tumor blush disappearance in n=13 (56.5%) or near-complete tumor blush disappearance with less than 10% residual tumor blush visualized in n=10 patients (43.4%). Surgical intervention was performed with a mean of 1.7 days after embolization and was associated with a mean of 1.88 L perioperative blood loss. CONCLUSION: Preoperative pelvic tumor embolization is a safe procedure with a mean of more than two feeding arteries identified and embolized. KEY POINTS: · Preoperative embolization is a safe procedure for pelvic bone tumors.. · Angiography identified a mean of 2.3 tumor feeding arteries embolized.. · Complete preoperative angiographic tumoral devascularization was found in 56% of patients.. · Surgical intervention after preoperative tumor embolization was associated with a mean of 1.88L perioperative blood loss.. CITATION FORMAT: · Hubrechts M, Wafa H, Sinnaeve F et al. Surgical Outcomes after Preoperative Embolization of Primary and Secondary Pelvic Bone Tumors. Rofo 2026; DOI 10.1055/a-2942-7451.
Observations over 212 patients with tumors of pelvic bones are reported. Benign tumors were detected in 101 patients, malignant--in 111. Some aspects of diagnosis and diagnostic errors in this disease, indications and contraindications to surgical intervention and plastic replacement of pelvic defects are discussed. Positive results of surgical treatment of pelvic bone tumors clearly evidence the possibility and necessity of an earlier use of extensive resections as a radical-saving procedure.
Earlier experimental and finite element studies notwithstanding, the load transfer and stress distribution in the pelvic bone and the acetabulum in normal conditions are not well understood. This hampers the development of orthopaedic reconstruction methods. The present study deals with more precise finite element analyses of the pelvic bone, which are used to investigate its basic load transfer and stress distributions under physiological loading conditions. The analyses show that the major part of the load is transferred through the cortical shell. Although the magnitude of the hip joint force varies considerably, its direction during normal walking remains pointed into the anterior/superior quadrant of the acetabulum. Combined with the fact that the principal areas of support for the pelvic bone are the sacro-iliac joint and the pubic symphysis, this caused the primary areas of load transfer to be found in the superior acetabular rim, the incisura ischiadaca region and, to a lesser extent, the pubic bone. Due to the 'sandwich' behavior of the pelvic bone, stresses in the cortical shell are about 50 times higher than in the underlying trabecular bone (15 to 20 MPa vs 0.3-0.4 MPa at one-legged stance). Highest intraarticular pressures are found to occur during one-legged stance and measured about 9 MPa. During the swing phase, these pressures decrease less than linearly with the magnitude of the hip joint force. Muscle forces have a stabilizing effect on the pelvic load transfer. Analysis without muscle forces show that at some locations stresses are actually higher than when muscle forces are included.
The aim of our study was to determine the value of magnetic resonance (MR) imaging in the diagnostic workup of pelvic bone tumors. We retrospectively evaluated the MR findings in 60 pelvic bone tumors. Owing to its high contrast resolution and multiplanar imaging capabilities, MR offers a clear depiction of cortical, medullar or soft tissue involvement, intratumoral necrosis, and relationship to neurovascular structures, and may be considered as the modality of choice for the staging of pelvic bone tumors. Since grading of bone tumors reaches a high accuracy on conventional radiography (CR), the value of MR imaging is rather complementary. Although the role of MR imaging in tissue characterization is mostly limited to recognition of tumoral components, accurate tissue characterization if often possible (e.g. in low-grade chondrosarcoma, eosinophilic granuloma, aneurysmal bone cyst, giant cell tumor, and chordoma). MR imaging in osteochondromas, metastases, and fibrous dysplasia remains of limited value since most of these lesions are well recognized on CR and/or CT. CR remains the first choice examination in diagnosis and grading of bone tumors, but MR imaging has significantly improved staging and tissue characterization in bone tumor imaging. The aim of our study is to determine the value of magnetic resonance (MR) imaging in the diagnostic workup of pelvic bone tumors, i.e. in staging, in differentiating benign from malignant tumors (grading), and in further characterization of tumors or tumoral components.
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The pedicled pelvic bone graft is a new operative technique for the treatment femoral head necrosis. 29 femoral head necroses were examined by i.a. DSA before a pedicled pelvic bone graft was implanted. 11 pedicled pelvic bone grafts were investigated postoperatively. The pre- and postoperative findings are presented. I. a. DSA is a valuable method for the evaluation of the vascularisation of the femoral head before and after surgery.
A continuous peridural anesthesia was used in 20 patients with pelvic bones injuries. Puncture of the peridural space was performed in an appropriate patient's posture. During 3--15 days 5--12 ml of 2% trimecain solution were infused via a catheter. For patients being in a shock condition the anesthetic dose was 3-4 ml less. 4-5 minutes following injection of the anesthetic in the peridural space pain at the site of fracture disappeared, there was noted a stabilization of hemodynamic indices, and the ventilatory and cardiac functions were improved. Anesthesia contributes to an early restoration of intestinal peristalsis, diuresis, active management of patients in bed. Strict rules of its conduction being followed, continuous peridural anesthesia is an effective method of analgesia in pelvic bones injuries, associated with a traumatic shock, that enabled to use it in traumatological practice.
Experience of surgical treatment of the damaged pelvic bones and its organs in 124 injured persons was summarized. The authors consider, that in combined trauma of pelvis and its organs it is necessary to undertake maximally possible reanimational-surgical measures during 12-72 hours after trauma occurrence, depending on its severity, character of injury of pelvic organs and bones. External fixation is the method of choice in unstable fracture of pelvic bones in early period of traumatic disease. Mortality was 10.5% (13 injured persons). Application of an active surgical tactics in early period of traumatic disease had promoted the shortening of the infectional complications frequency as well as of duration of stationary treatment in 2 times.
Associated injuries of pelvic bones and urethra were observed in 50 children. The clinical picture, diagnosis and methods of treatment are described with special reference to time gone after trauma. The most effective method of treatment of ruptured urethra is thought to be putting the primary suture.
STUDY OBJECTIVE: We sought to determine whether the reliability of clinical evaluation for pelvic bone fracture after trauma is compromised by a serum ethanol level of 100 mg/dL or greater. METHODS: This is a retrospective case control study of trauma registry patients presenting from October 1, 1995, to March 31, 1997, to an urban level I trauma center. Inclusion criteria were as follows: blunt trauma, age 13 years or older, and Glasgow Coma Scale score of 13 or greater. Exclusion criteria were as follows: isolated penetrating injury and suspected spinal injury. Patients were separated into 2 groups: those with an ethanol level of 100 mg/dL or greater, and those with an ethanol level of less than 100 mg/dL. Physician performance in clinical identification of pelvic bone fracture by using a complaint of pain, pelvic tenderness, with or without deformity, was compared between the 2 groups. RESULTS: Seven hundred sixty-three patients met inclusion criteria. Fifty-five (7. 2%) patients had a pelvic fracture, 75% of which were isolated acetabulum or pubic ramus fractures. Two hundred six control patients without pelvic fractures were randomly selected. The sensitivity and specificity of the complaint of pain and tenderness, deformity, or both for identification of a pelvic fracture was not significantly different between the ethanol groups. Five (9%) of 55 patients with pelvic fractures had neither a complaint of pain nor bony tenderness or deformity on examination. This was not statistically associated with an ethanol level of 100 mg/dL or greater (P =1.000). CONCLUSION: In our study, clinical evaluation for pelvic fracture in trauma patients with a Glasgow Coma Scale score of 13 or greater was not compromised by an ethanol level of 100 mg/dL or greater. The most common reason for clinically missed pelvic fractures was the presence of additional painful distracting injuries.
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The experience of the computed tomography (CT) application in the pelvic bones and sacrum tumors diagnosis in 46 patients was summarized. The data obtained were defined more precisely using magnet-resonance tomography (MRT). MRT in contradistinction to permits to differentiate the soft tissues and reveal the tumoral invasion of dura mater and the spinal cord substance, the spinal cord nerves affection. Using CT it is possible to estimate more accurately the bone structure and tumoral elements, containing calcium.