Osamu Nishizawa

Angiomyolipoma of kidney involving the inferior vena cava

Abstract  We successfully treated a case of angiomyolipoma of the right kidney involving the inferior vena cava. Tissue sections of the tumor were immunostained and immunohistochemically tested with the smooth muscle related antibodies, namely, calponin h1, h‐caldesmon and α‐smooth muscle actin, and were then compared with the five cases of common type of angiomyolipoma. Furthermore, we reviewed and analyzed 25 case reports of invasive renal angiomyolipomas.

A Retroperitoneal Bronchogenic Cyst: Laparoscopic Treatment

Subdiaphragmatic bronchogenic cysts are rare, and those located retroperitoneally are exceptional. We describe a retroperitoneal cyst presenting as an asymptomatic adrenal mass which was treated with laparoscopic surgery with three trocars.,

Anatomical reconsideration to renal area : Lessons learned from radical nephrectomy or adrenalectomy through a minimal incision over the 12th rib

Abstract Background: To perform radical nephrectomy or adrenalectomy through a minimal incision over the 12th rib and to compare this with the traditional supracostal or transcostal approach. We review and clarify the related surgical anatomy through close observation.

Large intestinal type-urachal adenocarcinoma with focal expression of prostatic specific antigen

We present a case of colonic‐type adenocarcinoma, which might arise from an urachal remnant through a villous adenoma. The cancer tissue in the present case showed focal immunoreaction to prostate‐specific antigen (PSA). This is the first report of urachal adenocarcinoma expressing PSA.

Resection of local recurrence of renal cell carcinoma in a hemodialysis patient 6 years after radical nephrectomy

Abstract  Left radical nephrectomy was performed on a 39‐year‐old‐man because of renal cell carcinoma (grade 1, clear cell and granular cell carcinoma: pT3b pN0 pM0), 6 years after the beginning of hemodialysis. The second surgical intervention for local recurrence was performed 6 years after the first operation (grade 2 > 3, clear cell and granular cell carcinoma).

Rupture of urachal diverticulum in radiation cystitis and neurogenic bladder dysfunction after radical hysterectomy

Abstract  We experienced a rare case of the rupture of the urachal diverticulum in radiation cystitis and neurogenic bladder after radical hysterectomy. A 61‐year‐old woman presented with severe lower abdominal pain and urinary retention. Abdominal computed tomography revealed that the urachal remnant contained a large volume of urine that leaked to subcutaneous tissue. We excised the urachal diverticulum and bladder together and created a continent urinary diversion using transverse colon. Nine months after the operation, the patient could manage clean intermittent self‐catheterization 6 times a day through her umbilical stoma without any urinary complications.

The Same-Pedicle Concept for Continent Urinary Diversion Using a Yang-Monti Reconfigured Tube

Objective: To facilitate the anastomosis of a continent valve to the umbilicus or a suitable skin area, we used a reconfigured tube made from the same segment of the intestinal reservoir as that used to construct the urinary pouch. Materials and Methods: Seven patients underwent continent ileal-pouch formation using a reconfigured ileal tube following cystectomy for bladder cancer. Two irradiated patients and 1 patient with neurogenic bladder underwent continent colon-pouch construction with a reconfigured colon tube. Results: The average length of the reconfigured ileal tube was 5 cm, while the colon tube was maximally 10 cm long. All procedures were technically straightforward. All the continent pouches functioned well, without catheterization difficulties. Conclusions: Since the Yang-Monti tube and the pouch are easily mobilized, being based on the same vascular pedicle, and can therefore bridge the gap, making the umbilical anastomosis was greatly facilitated. Sufficient support for the tube is provided by the pouch.