Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.

Abstract: Absorption of dietary phosphorus plays a critical role in the development of metabolic bone diseases in patients with chronic renal failure. However, phosphorus absorption is difficult to quantitate in dialysis patients because the dialysis treatments complicate metabolic balance studies. Utilizing a recently developed technique which permits measurement of net absorption of dietary constituents after a single meal, we measured phosphorus absorption in dialysis patients. The following observations were made: A.) Following a meal containing approximately 300 mg phosphorus, mean phosphorus absorption in five hemodialysis patients (with severe vitamin D deficiency) was only slightly less than in matched controls (186 +/- 35 vs. 242 +/- 30). B.) After dialysis patients were treated with 1,25(OH)2-D3, phosphorus absorption increased from 186 +/- 35 to 272 +/- 16 mg (P less than 0.025). C.) The effect of three aluminum containing antacids on phosphorus absorption was studied; each slightly reduced the absorption of phosphorus compared to placebo (P less than 0.01), but there was no significant difference between them. D.) Aluminum hydroxide and calcium carbonate each reduced dietary phosphorus absorption to approximately the same extent. Calcium carbonate ingestion was associated with sharply increased calcium absorption. The absorption of dietary phosphorus is influenced only modestly by 1,25(OH)2-D3 and is inhibited to an equal but only modest degree by various aluminum antacids and by calcium carbonate.
The absorption of dietary phosphorus and calcium in hemodialysis patients.

Abstract: Review of the literature reveals much disparity regarding the incidence, natural history, and survival rate in patients harboring esthesioneuroblastoma (olfactory neuroblastoma). The metastatic tendencies of this tumor have been highly variable in the literature, and reported intracranial involvement has been via local extension from the tumor's origin near the cribriform plate. Our present case describes a metastasis of esthesioneuroblastoma to the right parietal cortex and meninges in a patient without evidence of local recurrence after combined surgical and radiation therapy 5 years previously. The broad spectrum of biological behavior of this tumor, and its response to various therapies are discussed. The immunohistochemical and ultrastructural features of this unusual tumor are also presented. Recommendations are made for the management of these patients, including regular serial neurological examinations, serial computed axial tomography or magnetic resonance imaging of the head and neck, and, in the initial management, chemotherapy.
Late intracranial metastasis from esthesioneuroblastoma: case report and review of the literature.

Abstract: Definitive treatment of life-threatening hemorrhage associated with blunt pelvic fracture remains controversial. To elucidate this issue, we reviewed 538 consecutive patients admitted with acute pelvic fracture during a 5-year period. Injury mechanism was motor vehicular in 214 (40%), falls in 152 (28%), auto-pedestrian in 92 (17%), motorcycle in 46 (9%), crush in 26 (5%), and assault or skiing in eight (1%). Ninety-two (17%) of these patients required greater than 6 units of blood transfusion during the first postinjury day, and are the primary focus of this report. Twenty-five patients (28%) had unilateral anterior (Group I, n = 20) or posterior (Group II, n = 5) fractures. The remaining 67 patients (72%) had anterior and posterior element involvement on the same side (Group II, n = 38), bilaterally (Group IV, n = 14), or open perineal wounds (Group V, n = 15). The PASG was applied in 47 patients (51%), and controlled hemorrhage in 12 (71%) of the 17 in whom it was used alone to tamponade pelvic bleeding. Peritoneal lavage was performed in 73 patients (79%). Initial aspirate yielded gross blood in 32 patients; 27 (84%) of these required urgent laparotomy. External skeletal fixation was applied in 19 patients; bleeding was controlled in 18 (95%). Pelvic angiography identified active hemorrhage in three patients and selective embolization was successful in two. Sixty-eight (74%) of the high-risk patients survived. Thirteen (54%) of the 24 deaths were attributable to the pelvic trauma, ten were due to recalcitrant bleeding, and three to delayed sepsis.(ABSTRACT TRUNCATED AT 250 WORDS)
Hemorrhage associated with major pelvic fracture: a multispecialty challenge.