Clinical cases in AIDS. 1.

As the human immunodeficiency virus (HIV) epidemic continues there are increasing numbers of patients with HIV-related disease. Doctors studying for the MRCP exam will need to be familiar with the common manifestations of HIV infection and acquired immunodeficiency syndrome.     

Depression symptoms in movement disorders: comparing Parkinson's disease, dystonia, and essential tremor.

Depression is common in Parkinson's disease (PD) and affects 30 to 50% of all patients. In contrast to the wealth of research on depression in PD, little is known about the occurrence of depression in other movement disorders. The primary objective of the current study was to determine whether the high prevalence of depression symptoms seen in PD is also found in other movement disorders, by directly comparing rates of specific depression symptoms and depression severity across PD, dystonia, and essential tremor (ET). Three hundred and fifty-four patients with PD, 83 patients with dystonia, and 53 patients with ET completed the Beck Depression Inventory (BDI). We found no significant between-groups differences for depression severity, frequency, or endorsement of specific depression symptoms. Forty-eight percent of PD patients, 37.3% of dystonia patients, and 34% of ET patients were found to be at least mildly depressed (BDI score of 10 or higher). The most commonly endorsed symptoms were fatigability, difficulty with work, anhedonia, and sleep disturbance. Clinicians should be aware that depression is a frequent problem in dystonia and ET, in addition to PD, and inquire about depression symptoms in these patients so that they can be appropriately treated.     

Ictal Single-Photon Emission Computed Tomography Imaging in Extra Temporal Lobe Epilepsy Using Statistical Parametric Mapping

PURPOSE: To examine the application of statistical parametric mapping (SPM) to analyze ictal single-photon emission computed tomography (SPECT) scans in surgical candidates with extratemporal lobe epilepsy. METHODS: The authors selected patients who underwent successful ictal SPECT acquisition in the process of surgical treatment of intractable partial epilepsy. Thirteen patients were identified who met inclusion criteria for confident seizure localization from either intracranial electroencephalogram recordings or epilepsy surgery outcome. In these cases, ictal scans were registered to an in-house-developed normal SPECT atlas composed of 14 spatially normalized brains of normal subjects. SPM96 was used to test on a voxel-by-voxel basis for statistically significant increases in blood flow associated with each patient's ictal scan. The results were then mapped back onto the patient's magnetic resonance image (MRI) for final interpretation. Statistical parametric mapping (SPM) analysis of ictal SPECT scans was compared to both conventional visual interpretation and the analysis of subtraction ictal SPECT co-registered to MRI (SISCOM). RESULTS: Ten of 13 patient scans showed localizing focal ictal increases in regional cerebral blood flow, all of which were concordant with ultimate epilepsy localization. Of the 3 cases not localized with SPM, 1 was localized by conventional visual interpretation and another, not localized by visual interpretation, was correctly localized with SISCOM. Two cases not localized by SISCOM were localized by both visual and SPM analysis. CONCLUSIONS: This work provides supportive evidence for proof of principle that SPM can be used to provide objective, accurate analysis of ictal SPECT scans in patients with extratemporal lobe epilepsy.     

Cataract surgery takes longer in functionally monocular patients.

BACKGROUND AND OBJECTIVES: To determine differences in the amount of work involved in caring for functionally monocular patients who undergo cataract surgery compared with binocularly sighted patients. PATIENTS AND METHODS: This was a retrospective study that included 100 consecutive functionally monocular patients and 100 binocularly sighted control patients matched by age (+/-5 years) and date of surgery ( +/-1 year). Office records were reviewed to determine several measures of office and operating room work effort. RESULTS: There was no difference between groups in preoperative telephone calls (P = .136), postoperative telephone calls (P = .580), preoperative office visits (P = .875), postoperative office visits (P = .601), or the number of times surgery was scheduled (P = 1.00). Monocular patients required more time for surgery (37.4 minutes) than binocular patients (32.4 minutes) (P= .010). CONCLUSIONS: It takes longer to perform cataract surgery on functionally monocular patients than on binocularly sighted patients.     

The proliferation and differentiation of the bone-lining cell in estrogen-induced osteogenesis

The purpose of this study was to determine the capacity of the bone-lining cell, which covers most nonremodeling bone surfaces in the adult skeleton, to proliferate and contribute to the rapid endosteal osteogenic response following estrogen treatment in male Japanese quail. In control, untreated birds bone-lining cells cover most of the femoral endosteal surface. Bone-lining cells are thinly extended along bone surfaces, have flat nuclei, and account for about 77% of the cells adjacent to the bone surface. The lineal density of bone surface cells in the controls was about 21 cells/mm of bone surface. By 16-20 h after estrogen administration cells with larger, round nuclei were seen on the bone surface and some of these cells contained a 3H-thymidine (3H-TdR) label. Within the first 24 h after estrogen administration the lineal bone surface cell density had increased to about 38 cells/mm. At 20-30 h after estrogen administration, most of the cells adjacent to the bone surface were round. The peak 3H-TdR labeling of cells immediately adjacent to the bone surface occurred about 36 h after estrogen administration. By 48 h the bone surface was covered with osteogenic cells and developing medullary bone. These results suggest that the bone-lining cell in the adult appears to retain some proliferative capability and osteogenic potential. However, because a rapid increase in cell density began prior to the rapid increases in 3H-TdR labeling, as well as the appearance of mitotic figures on the bone surface, another source of cells may have also contributed to the osteogenic response induced by estrogen.