Calf implants.

There are several articles on the positioning of calf implants that emphasize the anatomic planes in which they should be placed. However, in none of them are the anatomical characteristics that make calves look attractive specified, and neither are the region's anatomic characteristics that guide us to acquire some criteria about the type, design, size, and anatomic plane in which calf implants are to be placed. Therefore, we decided to differentiate the characteristics that make calves look attractive, and also to catalog the defects to systematize the surgical techniques for correction and detail the points that distinguish one attractive calf from another with projection and volume but without harmony.

[Colon aganglionosis in patients with anorectal malformation. Analysis of five cases].

Introduction: The association of colon aganglionosis and anorectal malformation is very rare. The objective is to show five clinical cases of anorectal malformation associated with Hirschprung's disease and its treatment and evolution.

Material And Methods: A retrospective, transverse, descriptive study was carried out at the National Medical Center "20 de Noviembre ISSSTE" from 1984 to 1999 that included all files of patients with anorectal malformation associated with Hirschprung's disease corroborated by histopathological studies.

Hemobilia. A case report.

We present the case of a 88 years old male, with a history of melena, demonstrated by repeated endoscopies to be secondary to hemobilia, and after endoscopic retrograde cholangiopancreatography we could demonstrate the presence of bleeding intraductal choledocus polyps with histopathological report of intraepithelial adenoma. Hemobilia is a rare cause of upper gastrointestinal hemorrhage with an increasing incidence because of the widespread use of invasive hepatobiliary procedures and improved recognition. In the majority of cases the cause is iatrogenic.

[Mitral percutaneous valvuloplasty with Inoue balloon. Long-term results at the National Medical Center " 20 of November" ISSSTE Mexico].

Unlabelled: Balloon mitral valvuloplasty has, over the last 15 years, become an established interventional procedure for patients with pliable non-calcified mitral stenosis. In this article we describe the long-term outcome of 100 patients from our hospital (National Medical Center "20 de Noviembre" ISSSTE, Mexico City), who were treated with this procedure. Average follow-up was 38.

[Long-term results of 2 therapeutic protocols in children with acute lymphoblastic leukemia of usual risk. Experience at the 20th of November National Medical Center].

The purpose of this study is to know the disease-free survival in children with acute lymphoblastic leukemia (ALL), submitted to two therapeutic programs. Habitual risk was defined as age older than 2 and younger than 10 years, without neurological, mediastinal or testicular infiltrations, leukocytes < 25 x 10(9)/l and morphologic cell type distinct of L-3. The first group (LAL81) included 30 patients, from 1981 to 1986, and they received: induction with vincristine (VCR) and prednisone (PDN); consolidation with mercaptopurine (MP), cytosine arabinoside (ARA) and doxorubicin (DOX); prophylaxis to the central nervous system (CNS) with radiotherapy and methotrexate (MTX)-ARA-hydrocortisone (HDR) intrathecal, and maintenance with MP and MTX.