Hiroshi Kawai

Congenital renal arteriovenous fistula: case report, review of Japanese literature and description of non-radical treatment.

A case of congenital arteriovenous fistula diagnosed by measuring the oxygen saturation difference of renal veins at the time of selective renal angiographic examination and a review of 38 relevant Japanese cases are reported. The English as well as the Japanese literature was reviewed. Treatment has consisted of partial nephrectomy, ligation of the branch artery supplying the fistula and intentional embolization of the arterial branches, feeding the shunt by catheter.

A Case of Bilateral Renal Oncocytoma

AbstractTo our knowledge, we report the first case of bilateral renal oncocytoma. Among more than 100 such cases reported recently no bilateral tumors could be found.

Longitudinal study of macrophages in prostatic fluid from nonbacterial prostatitis patients

Longitudinal study of percentage of macrophages among leukocytes in prostatic fluid from 10 patients with nonbacterial prostatitis did not show correlation between percentage of macrophages and severity of clinical symptoms.

Congenital mesoblastic nephroma

For more than a decade congenital mesoblastic nephroma of infancy has been recognized as an entity different from Wilms tumor in its clinical and histopathologic features. However, this tumor is sometimes confused with Wilms tumor and consequently, inadvertent and vigorous therapy compatible with that for Wilms tumor is given. we reviewed the literature and analyzed 90 cases of congenital mesoblastic nephroma in the English and Japanese literature. The importance of early and accurate histopathologic diagnosis of the resected specimen to avoid inappropriate post-operative therapy is emphasized, and the peculiar features of congenital mesoblastic nephroma are characterized.

Linear Striated Vascular Pattern: Its Implication on a Renal Angiogram, Clinical Importance and Pathologic Verification

A case of hypernephroma with neoplastic extension to the renal vein showing a characteristic linear striated vascular pattern on a renal angiogram is presented. A nephrectomy specimen was examined pathologically and angiographic correlation subsequently was inferred. Implication of this unusual pattern on the renal angiogram is emphasized through our experience and review of relevant literature in order to predict the prognosis and to prepare for radical treatment.