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At least 19 recordsLinked to original sources
PubMed2003

Sex and age diagnosis by ischium morphometric analysis.

The growth of four variables of the ischium was analysed by polynomial regression in order to evaluate its significance and its capacity for age and sex determination during and after growth. The material used was 327 specimens ranging from birth to 97 years of age from four documented west European collections. The growth curves were calculated for ischium length and three new variables of the acetabular surface (horizontal diameter of ischium acetabular surface, vertical diameter of ischium acetabular surface and ischium acetabular index). All curves, except those of the female series of vertical diameter of ischium acetabular surface and its index, showed a lineal growth corresponding to vertical variables. All variables studied, except the ischium acetabular index, can be used variables for adult sexual discrimination. Furthermore, ischium length and the horizontal and vertical diameters of the acetabular surface can be useful for sub-adult age determination in archaeological samples, as well as in forensic samples. However, the ischium length is the best variable, as it can be applied to all the growth ages.

Acetabulum↗
PubMed1986

The gluteal approach to the ischium.

This paper describes a gluteal approach to the ischium which facilitates a good exposure of the whole region from the lower part of the ischium to the pubic ramus and allows extensive resections and partial hip reconstruction if necessary. The approach is demonstrated as used in two cases - one benign (desmoplastic fibroma) and one malignant tumor (chondrosarcoma).

Buttocks↗
PubMed1998

Pelvic osteotomies: anatomic pitfalls at the ischium. A cadaver study.

Pelvic osteotomies for acetabular dysplasia include an osteotomy of the ischium. The potential anatomical hazards of three different osteotomies of the ischium were assessed by performing a triple osteotomy in a series of 8 fresh cadaver pelvises. An oblique osteotomy above the sacrospinous ligament using a posterior approach requires that the inferior gluteal and pudendal neurovascular bundles be mobilised and retracted. A transverse osteotomy below the sacrospinous ligament using a posterior approach can be performed in a relatively safe area between the pudendal and sciatic nerves. A transverse osteotomy from anterior can be performed through a modified Smith Peterson approach. The pudendal nerve medially, the sciatic nerve laterally and the medial circumflex artery distally are not visualised and are prone to damage.

Cadaver↗
PubMed1993

Eosinophilic granuloma of the left ischium.

A case of eosinophilic granuloma in an unusual location (ischium) is presented. Eosinophilic granuloma, a benign lesion of bone, has many radiographic appearances that vary with location. The flat bone of the skull and pelvis are common sites of involvement. Although the iliac wings and pubic rami are not uncommon sites for such a lesion, the ischium is a rare site. This occurrence prompted us to report this case.

Adult↗
PubMed2003

Differences in the crista dentata structure of the ischium of the third maxilliped in Astacus leptodactylus (Eschscholtz, 1823).

The differences in the crista dentata structure of the ischium of third maxilliped in different size Astacus leptodactylus (36-80 mm carapace length) were investigated. The results showed that four different types of crista dentata structure and teeth number occur in the third maxillipeds of A. leptodactylus. These are: (1) same number of teeth in the crista dentata of right and left third maxilliped, but not in the same structure, (2) different number and structure of teeth in the crista dentata of right and left third maxilliped, (3) same number and structure ofteeth in the crista dentata of right and left third maxilliped, (4) same sturucture of teeth in the crista dentata of right and left third maxilliped, but not same number of irregular teeth. In conclusion, it is believed that the differences in the crista dentata structure and different tooth number of the ischium of maxilliped cause a different cutting edge and variations in the food choice of A. leptodactylus.

Animals↗
PubMed1975

The ischium and hip extensor mechanism in human evolution.

Although it is commonly stated that the ischia of the late Pliocence-early Pleistocene hominid fossils are long and ape-like, new interpretations show this view to be falacious. An important new theory proposed by Robinson concludes that the gracile form of early hominid was an efficient biped, but the robust form was a less efficient biped and was adapted for tree climbing. Interpretation of the ischium is crucial to this idea. The present study shows that (1) the gracile and robust australopithecine ischia had similar relative lenths and (2) that the hamstring mechanism was probably very similar in the two forms of South African early hominid.

Acetabulum↗
PubMed1988

Giant cell tumor of the ischium. A report of two cases and review of the literature.

The ischium represents one of the rarest sites of giant cell tumor of bone. Two additional cases are presented here. The unusual site, aggressive appearance and occurrence in older individuals are suggestive of other primary and secondary malignancies. Characteristic features of giant cell tumor and current treatment options are reviewed.

Bone Neoplasms↗
PubMed1992

Tumoral calcinosis of the ischium.

The authors report on a case of tumoral calcinosis of the ischium in a 63-year-old female. By means of this particular case a general review of the literature on pathogenesis, histological characteristics, the possible way of treatment and the prognosis of tumoral calcinosis is presented.

Bone Diseases↗
PubMed1986

Pressure distribution under the ischium of normal subjects.

This paper describes the development of a system for measuring pressure distribution at the patient-support interface. The instrument uses pneumatic techniques under microcomputer control to measure pressures, with an overall accuracy of 3 per cent of full scale. The instrument has been used to investigate the pressure distribution under the ischium of four normal subjects, using a rectangular matrix. The study demonstrated a small variability in pressure distribution with a subject sitting still. Repositioning the subjects produced large variations in pressure readings, as a result of postural changes, which must be taken into account in the design of seating trials.

Adult↗
PubMedDate not supplied

[Tumoral calcinosis of the ischium].

The authors report on a case of tumoral calcinosis of the ischium in a 63 year old female. A general review of the literature on pathogenesis, histological characteristics and the way of treatment is given and the prognosis of tumoral calcinosis pointed out.

Bone Neoplasms↗
PubMed1996

Use of preoperative autologous blood donations and erythropoietin for treatment of giant cell tumor of the ischium.

A 24-year-old man with an osteolytic lesion of the ischium was referred to the authors' institution. Computed tomography and magnetic resonance imaging studies showed that the lesion extended to and involved the subchondral bone of the acetabulum. Histologic examination of the biopsy specimen revealed giant cell tumor of bone. Following the biopsy, autologous blood was collected 4 times with recombinant human erythropoietin treatment definitive surgery was performed. Three weeks after the biopsy, the lesion was curetted and bone cementation was performed. The total blood loss during surgery was 3100 ml, which was replaced successfully with stored autologous blood without the need for homologous blood transfusion. The authors believe that without the erythropoietin treatment, autologous blood could have been collected only 3 times instead of 4 times, and the patient would have needed homologous blood.

Adult↗
PubMed1979

Giant cell tumor of the ischium: unusual site and outcome.

We have described an unusual case of giant cell tumor of the ischium. The remarkable features of the case are that it occurred in a relatively rare site and that it transformed radiologically from a localized, well circumscribed lesion into a very destructive lesion over a period of several months, though histologically it remained benign in appearance. The lesion was successfully treated by a modified hemipelvectomy. We emphasize that the treatment of choice in giant cell tumor of bone is total en bloc excision and not curettage or irradiation.

Bone Neoplasms↗
PubMed1981

[Resection of the ischium in paraplegics (author's transl)].

A technique of resection of the ischium in paraplegics is described. It aims to avoid pressure sores arising from the development of hygromata in active paraplegics. The resection must be complete, subperiosteal and bilateral when necessary. A muscular plasty must be made by suturing the hamstrings to the pyriformis and gluteus medius.

Humans↗
PubMed1994

Tuberculosis of the ischium.

Tuberculosis remains frequent in some underdeveloped regions. Bone and joint tuberculosis is less frequent than pulmonary forms. One case of tuberculosis of the ischium is presented. Treatment by simple curettage and antituberculous drugs led to a good result.

Aged↗
PubMed1998

Regression of massive tumoral calcinosis of the ischium in a dialysis patient after treatment with reduced calcium dialysate and i.v. administration.

BACKGROUND: Tumoral calcinosis, an inherited metabolic disorder, has been described with increasing frequency over the last 20 years [Drueke 1966]. It is characterized by massive calcium phosphate deposits in periarticular tissues, usually around large joints, especially the hips, knees and elbows (editorial in Lancet 1987). PATIENT AND METHOD: We describe a 58-year-old male patient with tumoral calcinosis of the ischium and severe hyperparathyroid bone disease, successfully treated with reduced calcium dialysate and vitamin D. CONCLUSION: We believe that in cases of tumoral calcification with histologically proven hyperparathyroid bone disease, lowering the calcium dialysate concentration together with careful administration of vitamin analogs and monitoring of serum calcium, phosphate and parathyroid hormone levels, may be the ideal therapeutic approach. Control of hyperphosphatemia would be best achieved with measures other than administration of aluminium phosphate binders if one wishes to avoid the induction of adynamic bone.

Calcinosis↗