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

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: Seventy two patients (39 women) with colonic adenomas were compared with 72 adenoma free controls (39 women) to investigate the possible association between previous cholecystectomy and the subsequent development of adenomas. Data were gathered retrospectively from medical records. Overall there was no significant association between colonic adenomas and previous cholecystectomy. When women are considered separately, however, eight cases and no controls had undergone cholecystectomy (odds ratio infinity lower 95% confidence limits 1.7, p greater than 0.01). No association between previous cholecystectomy and large bowel adenomas was found in men. Four of nine (44.4%) women with right sided colonic adenomas had undergone previous cholecystectomy compared with only three of 23 (13%) women with left sided adenomas.
Cholecystectomy and adenomatous polyps of the large bowel.

Abstract: The excretion of four inhibitors of urinary stone formation (zinc, magnesium, citrates and glycosaminoglycans (GAG) was studied in 20 normal controls and 40 recurrent calcium stone formers who were placed on a fixed diet restricted in calcium, oxalates and purines. We were unable to show any abnormality in the excretion of Zn, Mg or GAG. In 11 patients, a low level of urinary citrate was a significant feature that was associated in most cases with a urinary pH value above 6. Citrate concentration (per litre) and output (per 24 h) were found to be lower than in the controls in 19 and 33% respectively of the determinations. The overall ratio of average urinary citrate concentration in patients and controls was 0.56, a figure in agreement with previous data.
Inhibitors of urinary stone formation in 40 recurrent stone formers.