Anomalous unilateral single pulmonary vein mimicking pulmonary varices.

Anomalous single pulmonary veins (AUSPV) is a rare anomaly of the pulmonary venous system. Six cases have been documented in the literature, and two additional are reported here. Since AUSPV mimics pulmonary varices on pulmonary angiography, careful interpretation of the pulmonary venous anatomy by bidirectional and stereoscopic angiography is mandatory for diagnosing this anomaly.

Neuroradiological manifestations of suprasellar pituitary adenomas, meningiomas and craniopharyngiomas.

The radiological manifestations of 16 pituitary adenomas, six meningiomas and 14 craniopharyngiomas were reviewed. The differential diagnosis of these tumors is possible with a few exceptions when skull radiography, CT, angiography and metrizamide cisternography are carefully evaluated. Prolonged injection angiography (PIA) is particularly important for demonstrating the contours of pituitary adenomas and meningiomas.

Primary intracranial sarcomas: radiological diagnosis with emphasis on arteriography.

The radiological manifestations of primary intracranial sarcomas may be non-specific and they vary widely according to their histological variations. Reticulum cell sarcomas, however, can be included in the differential diagnosis with a high degree of reliability when one observes a hypovascular mass with arterial encasement and deep medullary veins. Tumor vessels and tumor stains supplied by dilated feeding arteries suggest the possibility of a sarcoma of the brain or of the meninges in infants.

Alterations in the properties of the rat myometrium during gestation and post partum.

The relationships among progesterone and oestradiol contents in the sera, membrane activities, catecholamine actions and contents of cyclic nucleotides were investigated in the rat myometrium during gestation and post partum, and under conditions of hormone treatment. Progesterone contents declined and oestradiol contents increased in the sera on the 21st day of gestation. During the late stage of gestation, oestradiol related to regularity, and progesterone to an irregularity, in the spike generation of myometrial cells.

Bilateral congenital multicystic dysplasia of the kidney.

The clinical and pathological features of congenital multicystic dysplasia of the kidney are reviewed and we report of a patient with bilateral dysplasia who lived longer than do most such patients. When multicystic disease of the kidney is bilateral, it is commonly confused with polycystic disease. Despite the fatal prognosis, differentiation is essential for appropriate genetic counselling since multicystic disease is not a familial occurrence.

Electrical and mechanical activities recorded from smooth muscle cells of the human fallopian tube.

The membrane activity recorded from the circular muscle layer of the human Fallopian tube showed a unique pattern (slow potential changes), yet the hormonal and adrenergic influences appeared to be much the same as observed in he myometrium. Differences in electrical and mechanical activities, and also the sensitivity to catecholamines during the secretory or proliferative period were elucidated.

Diurnal changes in calcium and phosphate metabolism in rats.

Diurnal changes in the metabolism of calcium and phosphate were studied in fasted conscious rats by use of a perfusion balance study method. On a light dark 12:12 h schedule and on a constant iv load of calcium among other nutrients, the animals exhibited a diurnal rhythm in which urinary excretion of calcium was low in the night and high in the day. This was accompanied by a reciprocal change in phosphate balance (high excretion in the night, and low in the day).

Prolonged injection angiography for diagnosing intracranial neoplasms.

Prolonged injection angiography (PIA), in which large amounts of contrast material are administered for three or four seconds, was used to visualize the vasculature of 70 intracranial neoplasms. Tumor stains were demonstrated better with or solely by PIA in all pituitary adenomas with suprasellar extension and in most meningiomas. PIA was less effective in tumors with marked arteriovenous shunts or in low-grade gliomas.

Lymphography for fever of unknown origin-a reappraisal.

Among the lymphograms of 25 F.U.O.

Hypertrophy of the placenta and sacrococcygeal teratoma. Report of two cases.

This report describes two pregnancies complicated by hydramnios, fetal death and sacrococcygeal teratoma in the second trimester. In both cases the placenta was remarkably enlarged. It is postulated that the tumors behaved in the manner of A-V fistulas and produced forward failure in the fetus similar to what is occasionally seen with large chorangiomas.

Angiographic diagnosis of acoustic neurinomas and meningiomas in the cerebellopontine angle--a reappraisal.

Forty-two acoustic neurinomas and seven meningiomas in the cerebellopontine angle were reviewed, and the radiological differential diagnosis of these tumors is discussed. Though enlarged internal auditory meati and characteristic CT findings were reasonably reliable indicators for the diagnosis of acoustic neurinomas, it was angiography which substantiated their correct diagnosis. An arcuate vein was frequently demonstrated with acoustic neurinomas, but never with meningiomas.

Prolonged injection angiography for diagnosing intracranial cavernous hemangiomas.

A case of intracranial cavernous hemangioma displaying feeding arteries, tumor stains, and venous pools is presented. Tumors of this type may simulate avascular masses on angiography; however, when surgically excised, they bleed profusely. A correct preoperative diagnosis can help avoid unnecessary incisions.

Angiographic diagnosis of fourth ventricle tumors.

Twelve primary fourth ventricle tumors and 22 medulloblastomas occupying mainly the fourth ventricle were analyzed, with emphasis on the differential diagnosis, vascularity, and some unusual findings. Though both types of tumor often have identical manifestations, the correct diagnosis can be made in most cases by careful evaluation of the posterior inferior cerebellar artery, particularly the choroidal and nodular branches. Unusual findings in primary fourth ventricle tumors mimicking tumors of the pons and medulla oblongata are described, and possible explanations for these findings are discussed.