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M V Kulkarni

Publications and source records attributed to M V Kulkarni.

68 records · Page 4Linked to original sources
PubMedDate not supplied

Benign pleomorphic adenomas of the salivary glands: surface coil MR imaging versus CT.

High resolution magnetic resonance (MR) imaging of three salivary gland tumors was performed at 1.5 T and compared with CT. Two of the three tumors were well seen on CT. However, one required CT sialography to separate tumor from the remaining parotid parenchyma, and, in the other, soft tissue invasion could not be excluded on the basis of CT. Magnetic resonance imaging demonstrated sharp tumor margins with no evidence of invasion. All three tumors were pathologically proven benign pleomorphic adenomas confirming the MR findings. On T2 weighted images, the two large adenomas demonstrated inhomogeneity that was not observed on CT.

Adenoma, Pleomorphic↗
PubMedDate not supplied

MR imaging of transverse/sigmoid dural sinus and jugular vein thrombosis.

Magnetic resonance (MR) imaging was performed on six patients with thrombosis involving the transverse/sigmoid sinus and jugular bulb/vein. Venographic confirmation was obtained in five cases. Thrombi were characterized by increased intraluminal signal on all planes of section and pulse sequences. The change in signal intensity from first to second echo for thrombi was qualitatively less than that found with slow flow. Partial thrombosis in one case was seen as a ring pattern of central intermediate intensity corresponding to the thrombus, surrounded by a peripheral ring of signal void related to flowing blood. The MR findings closely correlated with venography in predicting thrombosis. Evidence of thrombi was not available from CT. Magnetic resonance is well suited for the diagnosis of occlusive disease of the dural venous sinus and jugular bulb.

Aged↗
PubMedDate not supplied

Craniocervical manifestations of neurofibromatosis: MR versus CT studies.

Craniocervical manifestations of neurofibromatosis on magnetic resonance (MR) imaging are described in three patients and compared with those on CT. Using MR, intracranial gliomas, schwannomas, and neurofibromas were detected as well as with CT. In addition, a brain stem lesion that was not visualized on CT and a cervical cord lesion that was not suspected clinically were diagnosed with MR. Taking into account the noninvasive nature of MR, we believe that this technique should be the primary imaging modality for screening and follow-up studies in patients with known or suspected neurofibromatosis.

Adult↗
PubMedDate not supplied

Maxillary sinus hemangioma: MR and CT studies.

A maxillary sinus hemangioma was detected as an incidental finding during magnetic resonance imaging of the head. The CT findings are more characteristic for the diagnosis of this lesion. Preoperative diagnosis of maxillary sinus hemangioma is important since these lesions can frequently cause a large amount of hemorrhage during surgery.

Hemangioma↗
PubMedDate not supplied

Affinity chromatography of maltase on aliphatic amines as ligands.

The primary amino group, the competitive inhibitor of maltase, was used as ligand and the enzyme was purified to homogeneity in a single step. The amino group affiants of ethylene (C2-NH2) and hexamethylene (C6-NH2) diamines were prepared by coupling to cyanogen bromide activated Sepharose CL-4B. The enzyme was quantitatively adsorbed at alkaline pH (pH 8.2), while the elution could be effected only in presence of maltose at acidic pH. The elution of enzyme by maltose was independent of spacer arms (C2 and C6) which suggests specific binding of the enzyme through inhibitor site.

Amines↗
PubMedDate not supplied

Cerebellar atrophy in an epileptic child: is it due to phenytoin?

A four and half year old epileptic child on phenytoin therapy since one year presented with signs of cerebellar dysfunction. Serum phenytoin level was high (33 mcg/ml) and computerised tomographic scan of the brain showed severe generalised cerebellar atrophy. The cerebellar signs represented drug over dosage and toxicity and persisted long after omission of phenytoin.

Anticonvulsants↗
PubMedDate not supplied

Hepatic hydatid cyst rupturing into sub-diaphragmatic space and pericardial cavity.

A ten-year-old male child presented with a large hepatic hydatid cyst which ruptured into the sub-diaphragmatic space and pericardial cavity, giving rise to a pericardial effusion. This communication between the hydatid cyst and the pericardium was documented on computerised tomographic scan of the chest and abdomen. The cyst was aspirated carefully and then enucleated. There was an associated right-sided reactionary pleural effusion. The pericardial effusion and pleural effusion resolved on albendazole therapy and did not require surgical intervention.

Albendazole↗
PubMedDate not supplied

1.5-T MR imaging of pituitary microadenomas: technical considerations and CT correlation.

Thirty-seven patients with suspected pituitary tumors were evaluated prospectively with MR imaging at 1.5 T. MR detected a microadenoma at its correct location in all eight patients who underwent transsphenoidal surgery, while CT showed a focal abnormality in the correct location in only four of the eight patients. In patients who were clinically and endocrinologically considered to harbor a microadenoma, MR detected a focal pituitary signal abnormality in 83% and CT demonstrated a focal density abnormality in 42%. Infundibular displacement, focal gland convexity, and sellar-floor abnormality were seen equally well with CT and MR. MR imaging protocol included sagittal T1-weighted spin-echo, coronal inversion-recovery, and coronal spin-echo or cardiac-gated spin-echo images. Although inversion-recovery images were superior in detecting focal pituitary lesions, some microadenomas were better seen on T2-weighted images. Cardiac-gated spin-echo images showed focal pituitary lesions better than ungated images did. Our technique demonstrates MR's superior sensitivity to CT in detecting a pituitary microadenoma.

Adenoma↗
PubMedDate not supplied

High-resolution MR imaging of juxtasellar meningiomas with CT and angiographic correlation.

The purpose of this study was to compare the relative merits of MR imaging, CT, and angiography in the preoperative evaluation and postoperative follow-up of patients with juxtasellar meningiomas. High-resolution MR studies in nine patients with juxtasellar meningiomas were evaluated and compared with CT and angiography. The techniques were compared for the evaluation of suprasellar, parasellar, and intrasellar extension, as well as for vascular displacement or encasement, postoperative recurrence or residual calcification, and bone changes. MR provided additional information considered significant by the neurosurgeon when compared with CT, and MR was considered superior to CT in the juxtasellar area. Although MR does not obviate angiography, in many cases angiographic findings were predictable by MR.

Cerebral Angiography↗
PubMedDate not supplied

MR imaging of hemophiliac arthropathy.

Magnetic resonance (MR) imaging of the knee was performed in 10 patients with hemophilia. The periarticular and subchondral abnormalities were classified according to the signal intensity from these regions on T1- and T2-weighted pulse sequences. Periarticular abnormalities were detected in 50% of the hemophiliac joints, and fibrous changes were noted in 57% of all the areas of subchondral abnormality. Magnetic resonance imaging identifies periarticular and subchondral abnormalities in patients with hemophilia and may help in monitoring the progress of the disease process.

Adolescent↗