Biomedical subjects
Publications and source records attributed to S K Patel.
The magnetic resonance (MR) appearance of a case of xanthogranulomatous pyelonephritis is described and compared with CT and surgical findings. Both CT and MR were comparable in displaying the morphology of this uncommon renal abnormality.
Uterine inversion is an unusual entity; chronic nonpuerperal inversion is rare. In this report we present a case of chronic nonpuerperal uterine inversion that was initially diagnosed as invasive endometrial carcinoma. The CT findings in this case are presented.
PURPOSE: The purpose of this work was to determine the efficacy of MR angiography (MRA) in the detection and characterization of occlusive disease in the vertebrobasilar system. METHOD: We retrospectively reviewed the posterior circulation registry of our institution to select 42 consecutive patients with posterior circulation ischemic symptoms who underwent both MRA and angiography. The extracranial vertebral arteries (ECVAs) were examined by two-dimensional time-of-flight MRA above the C6 level, and the intracranial vertebral arteries (ICVAs) and basilar arteries (BAs) were examined by three-dimensional time-of-flight MRA. Sixty-two ECVAs, 63 ICVAs, and 39 BAs were examined by the readers. RESULTS: Occlusive disease was seen on angiography in 22 of the 42 patients. The sensitivity and specificity values for detection of lesions in 12 ECVA, 19 ICVA, and 12 BA abnormalities were as follows: ECVA, 92 and 96% for Reader A and 100 and 90% for Reader B; ICVA, 84 and 93% for Reader A and 74 and 82% for Reader B; and BA, 100 and 88% for Reader A and 100 and 78% for Reader B. For ICVA, the sensitivity of MRA was less than that of angiography because of lesions missed by the readers at the junctional area of the extra-and intracranial MRA. MRA accurately characterized 9 of the 12 (75%) ECVA, 10 of the 19 (43%) ICVA, and 11 of the 12 (92%) BA lesions. CONCLUSION: MRA is an effective method for detection of occlusive lesions in the ECVAs and BAs. Clinically important lesions can be missed by MRA in the ICVA. MRA is more accurate in characterization of occlusive lesions in BAs than in ECVAs or ICVAs.
Kaposiform haemangioendothelioma is a rare vascular neoplasm with a wide anatomical distribution. We describe an unusual case arising in the post-auricular skin of a male infant overlying a ventriculoperitoneal shunt.
Mucocoeles of the paranasal sinuses most commonly occur in the frontal or anterior ethmoidal sinuses. We report two rare cases of mucocoele of the maxillary sinus and describe the presentation, investigations and treatment. A review of the literature on this rare clinical entity is included, with specific reference to diagnostic imaging to distinguish mucocoeles from neoplastic sinus disease.
Suburothelial hemorrhage of the renal pelvis is a well documented complication of anticoagulant therapy. The urographic and CT features of this complication have been described; however, previous reports have included only contrast-enhanced CT. We report a case in which preinfusion CT, with careful evaluation of the attenuation coefficient, was essential in the diagnosis of suburothelial hemorrhage.