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Biomedical subjects

O Leiva

Publications and source records attributed to O Leiva.

At least 19 recordsLinked to original sources
PubMed1992

[Therapeutic options in metastatic renal carcinoma].

Within the scope of urogenital tract tumoral diseases, renal adenocarcinoma is the third most frequent neoplasia diagnosed in the adult population. The limited clinical presentations in early analysis and their anarchical behaviour are the cause for 50% to 60% of patients having already developed distant disease at the time of diagnosis. The only curative procedure so far is radical surgery, which is possible when there is a single metastatic site and sometimes even, depending on various factors which will be analyzed, several sites. In these occasions, the traditional therapeutic choices (Hormonotherapy, Chemotherapy, Radiotherapy) have proven to have limited or no efficacy in managing the disease. This fact, together with the successful results obtained in other tumoral processes, have allowed the clinical development of different modalities of Immunotherapy for the management of metastatic renal carcinoma, with results clearly hopeful. This work is a review of the results reported for each of the mentioned therapeutic choices, basically analyzing the role currently played by surgery and immunotherapy in the management of advanced renal carcinoma.

Combined Modality Therapy↗
PubMed1992

[Extrinsic stenosis of the ureter. Our caseload and review of the literature].

Obstructive uropathy is the common presentation course for various processes with an origin either intraluminar, parietal or extraluminar. A retrospective analysis of 41 cases of extrinsically originated obstructive uropathy seen in our Urology Unit from 1976 to 1991 was carried out. The cases were divided in three groups following an exclusively etiological criterion: 21.9% (9 patients) corresponded to primary retroperitoneal fibrosis; 51.2% (21 patients) to tumoral ureteral obstruction; and 26.8% (11 patients) to non-tumoral processes. For each division established, the features of clinical presentation, performance of the various diagnostic procedures used, and different therapy approaches are described also including a review on the current literature.

Adult↗
PubMed1990

[Intravesical echography. II. Staging].

We evaluated 137 patients with bladder cancer submitted to surgery in order to determine the usefulness of intravesical ultrasonography (IVU) in tumor staging. The characteristic scan images were defined for each tumor stage. The application of the ultrasound patterns yielded an accuracy rate of 91% for tumors Ta"1 and 71% for T4. Based on the results of this study, IVU does not appear to be useful as an intraoperative monitoring technique.

Adult↗
PubMed1979

[Retroperitoneal malignant xanthogranuloma. 1 case and a literature review].

A case is reported, the 33rd to be published in the literature, of malignant retroperitoneal xanthogranuloma. The tumor involved 2 cm of the right ureter at the junction between the middle and upper thirds. The middle third of the ureter was removed and ureteral continuity established by end to end ureteral anastomosis. The patient died fourteen months later probably from metastases, though the presence of these was not confirmed.

Diagnosis, Differential↗
PubMedDate not supplied

[Vesicovaginal fistulas: correction using lyophilized dura mater].

Thirty three cases of surgically corrected vesicovaginal fistulae, from a total of 73 patients with iatrogenic or pathological urinary tract conditions examined and treated in our service, are presented in this paper. Both the etiology and different surgical techniques that can be used are reviewed, contributing the novelty use of freeze dried dura mater as the material to interpose for the correction of the fistulae by means of abdominal surgical techniques. The material was used in 6 patients, with recovery being obtained in all cases and achieving the fistulae closure with a single surgical procedure.

Adolescent↗
PubMedDate not supplied

[Penile self-injection of a papaverine-phentolamine combination, as treatment of impotence, in patients treated with radical cystoprostatectomy].

Four patients with impotence secondary to radical cystoprostatectomy due to infiltrant vesical urothelial carcinoma, received treatment with a mixture of papaverine-phentolanin, at dosages of 18-0, 34 mg respectively. Good results were obtained in every occasion, all four cases achieving rigid erection for over an hour which allowed penetration. Currently, patients continue peneal self-injection treatment with these drugs, with no complications or therapy failure being reported.

Adolescent↗
PubMedDate not supplied

[Purulent urethritis secondary to intraurethral foreign body].

Due to the rarity of the cases presented in this paper, the prolonged time of residence in the urethra and the limited functional repercussion produced by the foreign bodies lodged in the urethra, we consider convenient the exposition of the mentioned cases.

Adult↗
PubMedDate not supplied

[Paratesticular liposarcoma of the spermatic cord].

Funiculus liposarcoma is a very uncommon tumor. Most cases have a low degree of malignancy. Inguinal orchiectomy with a wide local excision is the appropriate treatment. Liposarcoma presurgical diagnosis is very infrequent and ultrasonography is the method that can provide some help to locate it. Currently, chemotherapy indication is unclear. Due to recurrence, specially of local foci, being a possibility a periodical follow-up is necessary in these patients. Nowadays, local recurrences are treated with repeated ample local excisions and radiotherapy. This work reviews the literature and presents a new case of round cells liposarcoma of the funiculus.

Genital Neoplasms, Male↗
PubMedDate not supplied

[Ectopic gas as a complication of surgical kidney biopsy].

Since the complications herewith presented as a consequence of surgical renal biopsy are really exceptional and references found in the existing literature rare, we have considered that the contribution of these two cases which developed a pneumomediastinum-pneumoperitoneum and pneumocele prespectively during the immediate post-surgical period would be of interest. Evolution was favourable in both cases, with spontaneous resolution of the process.

Adult↗
PubMedDate not supplied

[Bone lithiasis].

Explore the source record for details and available documents.

Kidney Calculi↗