[Unstable detrusor: usefulness of biofeedback]. / Detrusor inestable: utilidad del biofeedback.

Presentation of results of treatment using Biofeedback in two conditions which quite frequently associate vesical instability and incontinence: 65 cases of enuresis and 39 of urinary stress incontinence in females. The method was effective and achieved disappearance of detrusor instability in 78.2% of enuretic cases and 58.9% of urinary stress female incontinence. Outcome for incontinence was less favourable since disappearance was only achieved in 70.5% of enuretics and 20.5% cases of female incontinence. A brief description of the method and instrumentation used is done, which can be easily conveyed to any electromiographic device with real time output. The paper substantiates the authors' views relative to the likely pathogeny of the instability in both processes and the mechanism of action of Biofeedback techniques.

[Bladder carcinosarcoma. A clinical case]. / Carcinosarcoma vesical. Caso clínico.

Presentation of a new case of vesical carcinosarcoma in a 49 year-old male patient. The tumour's pathoanatomical study showed an epithelial pattern of transitional and squamous cells and a sarcomatous pattern composed of rabdomiosarcoma, osteochondrosarcoma and pleomorphous indifferentiated sarcoma with giant multinuclear cells. Histogenesis, signs and symptoms, and treatment, as well as the need of performing an immunohistochemical study for its diagnosis are discussed.