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Biomedical subjects

A Kurata

Publications and source records attributed to A Kurata.

At least 91 records · Page 5Linked to original sources
PubMed1994

[Cysts in the cavum tunica vaginalis testis: a case report].

A case of cysts in the cavum tunica vaginalis testis was reported. A 58-year-old man visited our clinic with the chief complaint of urethral bleeding. Urethro-cystogram revealed stricture of bulbous urethra. We palpated several pea-sized painless masses in the left scrotum. On ultrasonogram of the left scrotal contents several cystic lesions were detected at the cranial side of the left testis. At operation, cysts were found in the cavum tunica vaginalis testis, and were resected along with the tunica vaginalis. Fluid of the cysts was serous without sperm. Histopathologically mesothelial cyst was suspected. The incidence of cysts in the cavum tunica vaginalis testis is rare and only 17 cases have been reported in Japan. We reviewed 9 cases of cysts arising from lamina parietalis of tunica vaginalis.

Cysts↗
PubMed1994

[Autologous pulmonary arterial flap for repair of truncus arteriosus in neonate and small infants].

Complete correction without external conduit repair by autologous pulmonary arterial flap was performed for the truncus arteriosus in one neonate and two small infants. In this study, we investigated advantages of postoperative hemodynamics and pulmonary artery growth from the data on truncus arteriosus repaired by the autologous flap technique. Patient in this study was classified as type I or II truncus arteriosus and age ranged from 19 days to 95 days after birth. One of the patients died of unexpected gastric bleeding 25 days after surgery. However, all showed excellent hemodynamics in the early postoperative period. The reconstructed pulmonary tract positioned rather left ward and posterior to the level of the systemic root than the technique with extra cardiac conduit repair. Compression did not occur at the created pulmonary tract and hemodynamics was fairly stable after closure of the chest. The postoperative RVP/LVP ratio ranged among 0.45 to 0.65 and the pressure gradient across the right ventricular out flow tract demonstrated only 10-15 mmHg. The size of the pulmonary arterial flap was sufficient even in type II truncus arteriosus to create right ventricle-to-pulmonary tract. However, the first patient underwent subsequent surgery 20 months after the initial surgery, because of left pulmonary artery stenosis due to intimal tissue overgrowth distal to the outflow patch. Surgical findings revealed that the posterior wall of the pulmonary tract was smooth and well developed. Traction of pulmonary arterial flap toward the right ventricular outflow tract shortens the distance between monocusp and left pulmonary arterial orifice than expected.(ABSTRACT TRUNCATED AT 250 WORDS)

Humans↗
PubMed1994

[A case report of condyloma acuminatum in female urethra].

A case of condyloma acuminatum in female urethra is reported. A 53-year-old woman was referred to our clinic because of urethral bleeding. A tumor was noted around the external urethral meatus and the size of the tumor was 20 mm in diameter. Excision was performed on the tumor including the external urethral meatus. Pathological examination revealed condyloma acuminatum. Condyloma acuminatum in female urethra is very rare. We reviewed and discussed 6 cases of condyloma acuminatum in female urethra, including our case, in the Japanese literature.

Condylomata Acuminata↗
PubMed1994

[A case of bilateral epididymal leiomyomas].

A case of bilateral epididymal leiomyomas is reported. A 62-year-old man was referred to our hospital under the suspicion of left testicular tumor. A small hen-egg sized painless mass was palpated in the left scrotum and a little-finger-tip-sized mass in the right scrotum. At the operation, bilateral epididymal tumors were revealed, left high orchiectomy and right epididymectomy were performed. Gross evaluation revealed elastic hard tumors at the tail of bilateral epididymis. The left tumor was 40mm in diameter and the right was 10mm. On the cut surface, the tumors were yellowish and solid. Histopathologically they were diagnosed as epididymal leiomyoma. We reviewed 75 cases of epididymal leiomyoma reported in the Japanese literature. Bilateral cases accounted for 21% of the 75 cases.

Epididymis↗
PubMed1994

[Leiomyoma of the kidney: a case report].

A case of leiomyoma of the kidney is reported. A 57-year-old man with the chief complaint of right back pain was consulted to our hospital. Abdominal computed tomography (CT) demonstrated a right renal tumor. Right renal angiography revealed a hypovascular lesion. Under the diagnosis of right renal tumor, right radical nephrectomy was performed. Gross evaluation revealed a well encapsulated solid mass. The tumor was 48 x 43 x 42 mm in diameter and a hemorrhagic region was present. Microscopically, the tumor was composed of interlacing bundles of spindle cells. Diagnosis was leiomyoma of the kidney. We reviewed 42 cases of renal leiomyoma reported in Japanese literature.

Humans↗
PubMed1994

[Completely thrombosed large aneurysm of the distal middle cerebral artery: a case report].

A 19 year old male was admitted for evaluation after a seizure. Physical and neurological examination was normal. CT demonstrated an enlarged, high density mass in the right parietal lobe. MRI showed a homogeneous high intensity T1 weighted mass, surrounded by a low intensity T2 weighted rim in the right parietal lobe. Angiography did not show any abnormal findings. A diagnosis of cavernous angioma with primary bleeding in the subcortical region of the right parietal lobe was made after radiological examination. Histological examination showed a completely thrombosed aneurysm. The mechanism of the complete thrombosis and the growth of this large aneurysm and the shortcomings of radiological examination are discussed.

Adult↗
PubMed1994

An unruptured arteriovenous malformation with edema.

We report a case of unruptured arteriovenous malformation in which an extensive zone of increased signal intensity in the brain parenchyma adjacent to the nidus is demonstrated on T2-weighted MR. This area of perilesional hyperintense signal exerts a compressive effect, suggesting that it represents perilesional edema.

Brain Edema↗
PubMed1993

Correlation between intravascular pressure and risk of hemorrhage due to arteriovenous malformations.

The correlation between intraoperative pressure levels measured in the feeding arteries and in the draining veins, and the risk of hemorrhage from arteriovenous malformations (AVMs) is discussed. Feeding artery pressure (FAP) was significantly higher in AVMs with hemorrhage (57 +/- 11 mmHg) than in AVMs without hemorrhage (38 +/- 4), and draining vein pressure (DVP) in the former (24 +/- 5) was significantly higher than that in the latter (13 +/- 5). FAP and DVP were inversely related to the number of draining veins and size of the AVMs. The present study suggests that a high FAP and a high DVP may contribute to the development of hemorrhage from AVMs, and supports previous reports that small AVMs and AVMs with only one draining vein are susceptible to hemorrhage.

Blood Pressure↗
PubMed1993

Ureteropelvic junction obstruction with renal pelvic calcification: a case report.

Calcification in the wall of the renal pelvis is rare. We report on a 65-year-old man with hydronephrosis secondary to ureteropelvic junction obstruction with renal pelvic calcification. Calcium deposit was found in the wall of the severely dilated renal pelvis. Pathological examination revealed a damaged and hyalinized fibrous renal pelvic wall and serum calcium level was normal. Thus, we speculated that this calcification was dystrophic. Chronic extensive dilatation with intermittent hemorrhage of the renal pelvic wall may have caused this dystrophic renal pelvic calcification.

Aged↗
PubMed1993

Subcortical cerebral hemorrhage with reference to vascular malformations and hypertension as causes of hemorrhage.

The authors have reviewed 80 cases of subcortical cerebral hemorrhage, in all of which intraoperative examinations during craniotomy or autopsies were performed. Cases involving trauma and aneurysm were excluded from the study. The diagnosis of subcortical hemorrhage was made by plain computed tomography in all cases. The most common cause of hemorrhage was vascular malformation (68%; 56 cases), in 20 (36%) of which angiographically occult vascular malformations were noted. Hypertension was present in 23 (29%) of 80 cases but was the cause of hemorrhage in only 9 cases (11%). Hypertension was present in 6 (30%) of 20 angiographically occult vascular malformations, all of which were in patients under 65 years. In 12 (75%) of 16 cases of angiographically occult vascular malformations, prolonged high-dose delayed-contrast computed tomography and magnetic resonance imaging were able to provide definite diagnostic information. We recommend that patients with subcortical cerebral hemorrhage, especially those under age 65, with or without hypertension, be carefully examined by prolonged high-dose delayed contrast computed tomography and magnetic resonance imaging for the presence of angiographically occult vascular malformations causing hemorrhage.

Adolescent↗
PubMed1993

[A case of renal cell carcinoma effectively treated by interferon-alpha and embolization of the renal artery].

A case of renal cell carcinoma effectively treated by interferon-alpha and the embolization of the left renal artery is reported. A 69-year-old man was referred to us because of a left renal mass. We made a diagnosis of a left renal tumor with tumor thrombus in the renal vein and inferior vena cava, and multiple lung metastases by imaging examinations. At first the embolization of the left renal artery was selected and interferon-alpha treatment was performed for 3 months. At 3 months after the embolization, the metastatic lung tumors had completely disappeared and the left renal tumor and the tumor thrombus were reduced in size, so that left radical nephrectomy was performed. Pathological examination revealed that a small part of the tumor was viable renal cell carcinoma. After the operation, interferon-alpha treatment has been continued for 15 months and recurrence and metastasis have not been detected.

Aged↗
PubMed1993

A case of primary localized amyloidosis of urethra.

Amyloidosis of the urethra is a rare disease. The clinical appearance resembles carcinoma of the urethra, so that biopsy is required to make the appropriate diagnosis. Once primary localized amyloidosis of the urethra has been diagnosed, selection of the appropriate treatment for each case becomes important. We report a case of primary localized amyloidosis in the male anterior urethra. This case was treated successfully with urethral dilatation.

Amyloidosis↗
PubMed1993

[Clinical study in patients with perimesencephalic subarachnoid hemorrhage of unknown etiology].

We have recognized a characteristic distribution of cisternal blood in 10 (43%) of 23 patients with subarachnoid hemorrhage (SAH) of unknown etiology. On the initial CT examination undertaken within 48 hours of the onset, blood from 10 patients was found to be more densely distributed in the cisterns around the brainstem. In this study, clinical characteristics and CT findings in those 10 cases were carefully evaluated and the CT findings were compared to those of 416 patients with aneurysmal SAH (anterior circulation aneurysm 368 cases, posterior circulation aneurysm 48 cases). There were seven men and three women, with an age ranging from 39 to 64 years (average age, 50.6 years). The follow-up period ranged from 4 to 45 months (average follow-up period, 23 months). Neurological grade (WFNS) on admission was I in 9 cases and III in one case. None of the patients suffered symptomatic vasospasm, hydrocephalus or rebleeding. All the patients had favourable outcome and were categorized as good recovery according to the Glasgow Outcome Scale. In comparison with the cases of aneurysmal SAH, especially in comparison with 48 cases with SAH caused by posterior circulation aneurysm, 43 cases could be easily distinguished on CT. The other 5 cases showed almost the same pattern of SAH on CT, but 4 cases could be differentiated by either the extension of SAH to the interhemispheric fissure or the presence of intraventricular hemorrhage. Only one case could not be differentiated on CT. Thus SAH located only around the brainstem differs from aneurysmal SAH in its clinical course, and in distribution and severity of bleeding on CT. This could be recognized as a new clinical entity and could be called benign SAH.

Adult↗
PubMed1993

[Autotransplantation as optimal technique for recurrent malignant myxoma of left ventricle].

Application of autotransplantation for left ventricular recurrent malignant tumor which was considered to be originating from the posterior leaflet of mitral valve was presented. A patient was 29 year-old-female and underwent the resection of tumor. The tumor was resected en bloc with the mitral valve, and its histology was myxoma. But she was required reoperation two times because of the recurrence of the tumor unfortunately. The tumor was ultimately diagnosed as the myxofibrosarcoma with chondroid differentiation. At the time of the third surgery, the heart transplantation was thought to be only treatment for radicality. While sounding American counterparts on the possibility of the heart transplantation, her condition took a sudden turn for the worse. An autotransplantation technique was applied for the resection of the tumor emergently. As a result, it was impossible to completely resect the tumor because of severe invasion to the left ventricle, and the patient died suddenly on the 75th day after the operation due to fetal arrhythmia. Through this case, heart transplantation should be considered for such a case, but autotransplantation technique allowed to be a life-prolonging in this case. We believe that this technique which will be obtained the excellent operative field could be used for repair of complex cardiac anomalies and rupture of left ventricle and so on.

Adult↗
PubMed1993

[A case of virilizing adrenocortical carcinoma in adult].

A case of virilizing adrenocortical carcinoma is reported. A 35-year-old woman was referred to our clinic because of left adrenal mass detected incidentally by ultrasonography. At the time of admission, facial acne, systemic hirsutism, hypertrophied clitoris and amenorrhea for two months were observed. Serum testosterone showed obviously high level and urinary 17-KS and 17-OHCS showed slightly high level. A computed tomography revealed a heterogeneous mass with calcification in the left adrenal region. Selective angiography revealed hypervascularity. Under the preoperative diagnosis of virilizing left adrenal tumor, left adrenalectomy was performed. The tumor measured 8 x 6 x 7 cm, and weighed 194 g. A diagnosis of adrenocortical carcinoma was made by pathological examination. Virilizing adrenocortical carcinoma is very rare in adults. We reviewed and discussed 10 cases of virilizing adrenocortical carcinoma in adults, including our case, in the Japanese literature.

Adrenal Cortex Neoplasms↗
PubMed1992

HTLV-I associated arthritis: characteristics of an HTLV-I virus infected T cell line from synovial fluid.

A T cell line from mononuclear cells in the synovial fluid of a patient with polyarthritis was established. The T cell line reacted with serum samples positive for antibodies to human T cell lymphotropic virus type I (HTLV-I) and with monoclonal antibody to HTLV-I p19. In Southern blotting with an env-pX-LTR HTLV-I probe and digestion of T cell line DNA with the restriction enzymes ClaI, DraI, and PstI generated fragments that were identical to those found in two HTLV-I infected T cell lines established from adult T cell leukaemia or HTLV-I associated myelopathy. The T cell line expressed CD2, CD3, CD4, CD45RA, CD29, HLA-DR, CD25, and CD26 antigens, but not CD8 and CD20 antigens. Large amounts of interleukin 6, interferon gamma, and tumour necrosis factor alpha were secreted in the culture supernatants of this cell line. This line helped immunoglobulin production by B cells, but not K562, Raji, and synovial cell lysis.

Aged↗
PubMed1992

Subaortic stenosis caused by an unusual fibrous blood-filled cyst of the left ventricle with outflow tract obstruction associated with a ventricular septal defect.

A large blood-filled cyst formed from a fibrous tissue tag of a right ventricular septal aneurysm was successfully resected. This cyst, which was causing subaortic stenosis, was attached to the margin of the closed ventricular septal defect and not to the mitral valve itself nor the papillary muscle of the left ventricle.

Aortic Stenosis, Subvalvular↗