Haruaki Kato

The role of capsaicin-sensitive afferents in autonomic dysreflexia in patients with spinal cord injury

To determine whether capsaicin‐sensitive nerves in the bladder form the afferent limb involved in autonomic dysreflexia (AD) in patients with spinal cord injury (SCI).

HISTOPATHOLOGICAL STUDY OF THE MÜLLERIAN DUCT REMNANT: CLARIFICATION OF DISEASE CATEGORIES AND TERMINOLOGY

PURPOSE We determined by histopathological studies whether there is an etiological difference in 2 distinct categories of müllerian duct remnant diseases. In addition, we clarified the nomenclature of these diseases. MATERIALS AND METHODS We recently performed radical prostatectomy in a patient with prostate cancer associated incidentally with a so-called müllerian duct cyst in the prostatic midline. The specimen was examined by pathological and immunohistochemical testing with special attention to the relationship of the cyst and utricle. We also investigated the histology of so-called enlarged prostatic utricles or vagina masculinus extirpated from patients with severe hypospadias or intersex disorder. RESULTS The round cyst removed with the prostate seemed to arise from the verumontanum and it contained fluid with a high concentration of prostate specific antigen. Histological and immunohistochemical examination of its lining epithelium demonstrated that cyst characteristics were identical to those of the prostatic utricle. On the other hand, pouches extirpated from patients with pediatric problems were lined by squamous epithelium. CONCLUSIONS The so-called müllerian duct cyst appeared to originate from the prostatic utricle, and so should be termed a utricular cyst or cystic utricle. Conversely the so-called enlarged prostatic utricle should be termed a vagina masculinus or male vagina. The term müllerian duct remnant, which would include these 2 abnormalities, may usefully be replaced by the term utricular abnormalities.

Female para-urethral adenocarcinoma: Histological and immunohistochemical study

Abstract Background:  Female urethral cancer with a diverticular form is assumed to originate from the para‐urethral  duct,  which  is  embryologically  homologous  to  the  male  prostate  gland.  The  purpose  of the present paper was to investigate the female para‐urethral adenocarcinomas histologically and immunohistochemically.

Anatomical and histological studies of so-called Müllerian duct cyst

Abstract  Background: We examined so‐called Müllerian duct cysts both histologically and immunohistochemically with anatomical observation to investigate the etiology of the ‘Müllerian duct cyst’.

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.

Squamous cell carcinoma in the renal pelvis of a horseshoe kidney.

Abstract We report a rare case of squamous cell carcinoma in the renal pelvis of a horseshoe kidney. An 80‐year‐old woman was referred to the National Nagano Hospital for the examination of occult blood in her urine. Microscopic hematuria was found, but pyuria was not seen. Computed tomography and magnetic resonance imaging showed a mass in the left renal pelvis of the horseshoe kidney. No renal stone or hydronephrosis was found. Cytopathological examination in the voided urine specimen was positive. Left nephroureterectomy with the splitting of the isthmus of the horseshoe kidney was performed without renal pedicle clamping using a microwave tissue coagulator. No bleeding was encountered after separating the isthmus. A final pathological diagnosis of squamous cell carcinoma with a tumor thrombus was made. Lymph node metastasis had developed and rapidly progressed and the patient died of disseminated malignancy 4 months after the operation.

Fate of tetraplegic patients managed by ileal conduit for urinary control: Long‐term follow‐up

Background: A study was conducted to evaluate our experience of ileal‐conduit formation in tetraplegic patients with special reference to late complications due to upper urinary tract stones and pyocystis.

Adenocarcinoma of female paraurethral duct showing neuroendocrine differentiation.

Two cases are presented in which a female urethral adenocarcinoma took the form of a diverticular cancer. The pathologic examination of each tumor revealed a columnar/mucinous type of adenocarcinoma with evidence of abundant mucous secretion. Some of the cancer cells were positive on immunohistochemical staining with the conventional neuroendocrine marker chromogranin A, indicating focal neuroendocrine differentiation. The present cases may indicate a possible site of origin for female paraurethral adenocarcinomas.

Continent urinary reservoir formation with transverse colon for patients with pelvic irradiation.

Background: The creation of a continent transverse colon pouch for patients who had previously received radiation therapy for cervical cancer was attempted.

New classification of midline cysts of the prostate in adults via a transrectal ultrasonography-guided opacification and dye-injection study

To reclassify midline cysts (MLCs) of the prostate according using the results from transrectal ultrasonography (TRUS)‐guided opacification and dye injection.