RESUMEN
BACKGROUND: The common inflammatory scalp disorders share similar clinical manifestations, and patient work up require invasive, undesirable diagnostic procedures like biopsy to ensure correct diagnosis. Optical coherence tomography (OCT) is a non-invasive high-resolution imaging modality that has found a valuable tool to assist in the diagnose and evaluation of different skin diseases. OBJECTIVES: To describe the structural and vascular dynamic OCT (D-OCT) findings of inflammatory scalp disorders including scalp psoriasis, seborrhoeic dermatitis and contact dermatitis and to compare trichoscopy and OCT features. METHODS: Subjects with diagnosis of seborrhoeic dermatitis, psoriasis or contact dermatitis were enrolled in this study. OCT scans were taken on involved scalp, and the same scalp regions were evaluated by trichoscopy and compared with healthy scalp. RESULTS: A total of fourteen subjects (two healthy controls, four seborrhoeic dermatitis, five psoriasis and three contact dermatitis) participated. D-OCT imaging of vascular pattern in healthy scalp and the inflammatory scalp disorders were described. D-OCT images could enhance the clinician's ability to distinguish psoriasis from seborrhoeic dermatitis by objectively detect and assess red loop density. In scalp contact dermatitis, the vessels of the deep plexus were more dilated and fewer in number than those found in seborrhoeic dermatitis. CONCLUSION: Dynamic OCT provides information that more clearly elucidates changes at the level of the superficial and deep plexuses without invasively interfering with superficial structures. In the context of inflammatory scalp disorders, this is useful to discern disorders with overlapping symptoms and minimize the use of invasive biopsies to diagnose.
Asunto(s)
Dermatitis por Contacto , Dermatitis Seborreica , Psoriasis , Dermatitis Seborreica/diagnóstico por imagen , Humanos , Psoriasis/diagnóstico por imagen , Cuero Cabelludo/diagnóstico por imagen , Tomografía de Coherencia ÓpticaAsunto(s)
Dedos/irrigación sanguínea , Tumor Glómico/diagnóstico por imagen , Enfermedades de la Uña/diagnóstico por imagen , Tomografía de Coherencia Óptica , Adulto , Anciano , Dermoscopía , Diagnóstico Diferencial , Femenino , Dedos/diagnóstico por imagen , Dedos/cirugía , Tumor Glómico/cirugía , Humanos , Interpretación de Imagen Asistida por Computador , Masculino , Persona de Mediana Edad , Enfermedades de la Uña/cirugíaRESUMEN
Percutaneous abscess drainage using cross-sectional imaging has become an accepted and important clinical tool. Most previous reports have emphasized the importance of CT as the primary study for guidance. Ultrasound has been suggested as a complementary as opposed to a primary guiding modality. This has been stated because of the complications that may result from possible incomplete visualization of intervening structures and demonstration of incomplete emptying. Our data of 91 abscess drainages in 66 patients treated with percutaneous abscess drainage and performed exclusively with ultrasound guidance, suggest that ultrasound is at least as useful and as accurate a tool for drainage as any other modality. An overall success of 89% was obtained and severe complications in general were less than previously reported utilizing CT. Out data suggest that ultrasound is certainly as useful a guiding technique for cross-sectional imaging when needed for localization and drainage of abscesses.
Asunto(s)
Absceso/terapia , Drenaje , Ultrasonografía , Adulto , Anciano , Anciano de 80 o más Años , Cateterismo/instrumentación , Drenaje/instrumentación , Femenino , Humanos , Masculino , Persona de Mediana EdadRESUMEN
The prolate ellipse formula has been shown to be inaccurate and inconsistent in the calculation of total uterine volume. The stepped area-to-volume technique has proven to be both accurate and consistent and provides a value equal to the true uterine volume. When these true volumes were plotted on previously published graphs of total uterine volume derived from the prolate ellipse formula, the graphs were found to be inaccurate. New graphs based on normal values have been constructed, comparing total uterine volume with both biparietal diameter and average gestational age. When 26 abnormal values were plotted on the total uterine volume versus biparietal diameter graph, almost all fell outside the 90 per cent confidence limits. Seven of the abnormal value were from fetuses found to have growth retardation. Six of these cases, including two not appreciated either clinically or ultrasonographically, were detected by this method. The stepped area-to-volume technique should allow reconsideration of the total uterine volume concept and aid in the detection of the subtle changes in uterine size.