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1.
Skeletal Radiol ; 48(4): 637-641, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30229348

RESUMEN

Desmoplastic fibroblastoma is an uncommon, benign fibrous soft tissue tumor that usually occurs in the arms, shoulders, neck, hands, and feet in the fifth to seventh decades of life. In general, it is commonly located in the subcutaneous tissue and skeletal muscle. The authors report an unusual case of a desmoplastic fibroblastoma mimicking tenosynovial giant cell tumor encasing a tendon of the foot in a 72-year-old woman. Ultrasonography revealed an inhomogeneously hypoechoic lobulated soft tissue lesion completely wrapped around the extensor digitorum longus tendon. Color Doppler study revealed increased vascularity in the internal and peripheral portions of the lesion. Magnetic resonance imaging revealed a well-defined, lobulated soft tissue mass encasing the extensor digitorum longus tendon with predominantly isointense signal with some areas of hypointense signal on T1-weighted images, predominantly hyperintense signal with some areas of hypointense signal on T2-weighted images, and inhomogeneous enhancement on fat-suppressed contrast-enhanced T1-weighted images. Surgical excision was performed, and the mass was diagnosed on pathological examination as a desmoplastic fibroblastoma. There has been no previously published radiologic case of a desmoplastic fibroblastoma encasing a tendon of the foot in the literature.


Asunto(s)
Fibroma Desmoplásico/diagnóstico por imagen , Huesos Metatarsianos/diagnóstico por imagen , Tendones/diagnóstico por imagen , Anciano , Medios de Contraste , Diagnóstico Diferencial , Femenino , Fibroma Desmoplásico/patología , Tumor de Células Gigantes de las Vainas Tendinosas/diagnóstico por imagen , Humanos , Imagen por Resonancia Magnética , Huesos Metatarsianos/patología , Neoplasias de los Tejidos Blandos/diagnóstico por imagen , Tendones/patología , Ultrasonografía Doppler en Color
2.
Eur Spine J ; 27(Suppl 3): 520-525, 2018 07.
Artículo en Inglés | MEDLINE | ID: mdl-29594468

RESUMEN

BACKGROUND: Ganglioneuromas are rare, benign, well-differentiated tumors arising from neural crest cells that commonly occur in the posterior mediastinum, retroperitoneum, cervical spine, and adrenal gland. We report an unusual case of an extensive spinal extradural ganglioneuroma, circumferentially and longitudinally affecting the extradural space of the lumbar spine and continuously invading bilateral psoas muscles. CASE DESCRIPTION: A 32-year-old man presented with a 1-week history of abdominal pain and diarrhea. Radiographs revealed scalloping of the posterior surfaces of the L2 and L3 vertebral bodies and widening of L2-3 and L3-4 bilateral intervertebral foramina. Computed tomography scans and magnetic resonance imaging showed a well-defined lobulated extradural mass from L1 to L4 and a continuously forming mass in the psoas muscles through L2-3 bilateral neural foramina. The mass demonstrated homogeneously isointense signal on T1-weighted images, inhomogeneously hyperintense-to-isointense signal on T2-weighted images, and inhomogeneous enhancement on fat-suppressed contrast-enhanced T1-weighted images. Radiologic diagnosis included spinal epidural lymphoma. Percutaneous biopsy with sonographic guidance was performed, and the mass was diagnosed on pathological examination as a ganglioneuroma. CONCLUSIONS: This is the first known reported case in the literature of a spinal extradural ganglioneuroma with circumferentially and longitudinally extensive involvement of the extradural space and a large psoas mass.


Asunto(s)
Ganglioneuroma/diagnóstico , Vértebras Lumbares/patología , Linfoma/diagnóstico , Adulto , Diagnóstico Diferencial , Espacio Epidural/patología , Ganglioneuroma/patología , Humanos , Imagen por Resonancia Magnética , Masculino , Tomografía Computarizada por Rayos X
3.
Skeletal Radiol ; 47(2): 293-297, 2018 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-29058044

RESUMEN

Angioleiomyoma is a benign, vascular smooth muscle tumor originating from the tunica media of the vessel wall. In general, it typically arises in the cutaneous, subcutaneous tissue or fascia of the lower extremities in middle-aged women and is less than 2 cm in diameter. We report an unusual case of an angioleiomyoma of the sacral foramina in an 82-year-old man. MRI revealed a well-defined irregular-shaped deep-seated mass in the sacral foramina, showing branching pattern of growth associated with pressure bony erosion of the adjacent bones, with isointense to hypointense signal on T2-weighted images. Surgical excision was performed and the mass was diagnosed as angioleiomyoma on pathological examination. To the best of our knowledge, there has been no report of an angioleiomyoma involving the sacral foramina.


Asunto(s)
Angiomioma/diagnóstico por imagen , Imagen por Resonancia Magnética/métodos , Sacro , Neoplasias de la Columna Vertebral/diagnóstico por imagen , Anciano de 80 o más Años , Angiomioma/patología , Angiomioma/cirugía , Medios de Contraste , Diagnóstico Diferencial , Humanos , Masculino , Neoplasias de la Columna Vertebral/patología , Neoplasias de la Columna Vertebral/cirugía
4.
Skeletal Radiol ; 47(5): 729-734, 2018 May.
Artículo en Inglés | MEDLINE | ID: mdl-29243144

RESUMEN

Calcifying aponeurotic fibroma is a rare, benign fibroblastic tumor that typically occurs in the palms of the hands and soles of the feet in children and adolescents. We report an unusual case of a calcifying aponeurotic fibroma with diffuse intra-articular involvement of the carpal joints in a 59-year-old female. Radiographs and computed tomography scans revealed a large lobulated soft tissue mass with multiple stippled calcifications around the carpal joints and numerous erosions of the second to fifth carpometacarpal and intercarpal joints. Magnetic resonance imaging showed diffuse multinodular synovial proliferation with inhomogeneous hypo- to isointense signal intensity on T1-weighted images, inhomogeneous hypointense to hyperintense signal intensity on T2-weighted images, and inhomogeneous intense enhancement on fat-suppressed contrast-enhanced T1-weighted images. Radiologic diagnosis included gout, calcium pyrophosphate dihydrate deposition disease, and tenosynovial giant cell tumor. Surgical excision was performed, and the mass was diagnosed on pathologic examination as a calcifying aponeurotic fibroma. There has been no reported case of a calcifying aponeurotic fibroma with diffuse intra-articular involvement of the carpal joints in the literature.


Asunto(s)
Neoplasias Óseas/diagnóstico por imagen , Huesos del Carpo , Neoplasias de los Tejidos Blandos/diagnóstico por imagen , Neoplasias Óseas/patología , Neoplasias Óseas/cirugía , Calcinosis , Condrocalcinosis/diagnóstico , Medios de Contraste , Diagnóstico Diferencial , Evaluación de la Discapacidad , Femenino , Gota/diagnóstico , Humanos , Persona de Mediana Edad , Neoplasias de los Tejidos Blandos/patología , Neoplasias de los Tejidos Blandos/cirugía
5.
Eur J Orthop Surg Traumatol ; 24(1): 79-84, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-23412269

RESUMEN

PURPOSE: The menisci play a critical protective role for the knee joint through shock absorption and load distribution. We hypothesized that cartilage degeneration will be abruptly progressed if meniscal subluxation exceeds a critical point. METHODS: Of 56 cases that showed medial meniscal subluxation without cartilage degeneration of ipsilateral medial femoral condyle (MFC) on initial MRI, from January 2005 to June 2007, meniscal subluxation index (MSI), the ratio of meniscal overhang to meniscal width in mid-coronal image of initial MRI, was measured. After 2 years, 40 cases were evaluated for cartilage degeneration of ipsilateral MFC on follow-up MRI. The relationship between medial MSI on initial MRI and cartilage degeneration of MFC on follow-up MRI was analyzed. Logistic regression analysis was conducted to find a critical point of meniscal subluxation related to cartilage degeneration. RESULTS: Abrupt progression of cartilage degeneration was observed from which MSI was 0.38. Logistic regression showed that if MSI was at the critical point, which was 0.38 in our study, then the probability of cartilage degeneration to grade 3 or 4 after 2 years was 44 %. If MSI was 0.4, then the probability was 50 %. If MSI was 0.6, then the probability was 99 %. CONCLUSIONS: The results suggest the existence of critical point from which the protective function of the meniscus appears to be significantly altered, and the degree of cartilage degeneration of ipsilateral femoral condyle corresponding to the amount of medial meniscal subluxation may be predictable.


Asunto(s)
Cartílago Articular/patología , Luxación de la Rodilla/complicaciones , Articulación de la Rodilla/patología , Meniscos Tibiales/patología , Osteoartritis de la Rodilla/complicaciones , Adulto , Femenino , Humanos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad
6.
J Korean Soc Radiol ; 85(3): 607-617, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38873379

RESUMEN

Purpose: Recent studies have demonstrated the usefulness of diffusion-weighted MR neurography (DW MRN) for assessing nerve roots. This study aimed to evaluate the utility of DW MRN with a unidirectional motion-probing gradient (MPG) for the lumbar nerve roots at 1.5T MR. Materials and Methods: Sixty-four lumbar spine MRI scans with DW MRN using anteroposterior unidirectional MPG were retrospectively analyzed. Any changes in the 512 lumbar spinal nerve roots from L3 to S1 were evaluated using T2-weighted imaging (T2WI), contrast-enhanced T1-weighted imaging (CE T1WI), and DW MRN, with agreement and correlation analysis. Results: T2WI revealed compression of 78 nerve roots, and CE T1WI revealed 52 instances of nerve root enhancement. Sixty-seven nerve roots showed swelling and hyperintensity on DW MRN. A total of 42 nerve roots showed changes in the CE T1WI and DW MRN sequences. Moderate to substantial agreement and moderate positive correlation were observed between DW MRN and CE T1WI, as well as DW MRN and T2WI (κ = 0.59-0.65, ρ = 0.600-0.653). Conclusion: DW MRN with unidirectional anteroposterior MPG can help evaluate neuritis-related changes in spinal nerve roots and could serve as a sequence capable of complementing or substituting gadolinium CE imaging.

7.
J Clin Ultrasound ; 40(2): 109-11, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21812001

RESUMEN

Chondromyxoid fibroma is a rare benign bone tumor, which represents less than 1% of primary bone tumors. However, chondromyxoid fibroma developing in the soft tissue is extremely rare. We report the sonographic findings in a case of soft tissue chondromyxoid fibroma in the foot confirmed pathologically.


Asunto(s)
Condroma/diagnóstico por imagen , Fibroma/diagnóstico por imagen , Pie , Neoplasias de los Tejidos Blandos/diagnóstico por imagen , Ultrasonografía Doppler en Color , Condroma/patología , Condroma/cirugía , Diagnóstico Diferencial , Femenino , Fibroma/patología , Fibroma/cirugía , Humanos , Persona de Mediana Edad , Neoplasias de los Tejidos Blandos/patología , Neoplasias de los Tejidos Blandos/cirugía
8.
Radiographics ; 31(3): 749-70, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21571655

RESUMEN

Neoplasms and tumorlike lesions that originate from chest wall tissues are uncommon compared with tumors in other parts of the body, and unfamiliarity with these disease entities can cause diagnostic difficulties for radiologists. Furthermore, the imaging features of many of these tumors are nonspecific, particularly those that are locally aggressive. However, a systematic approach based on patient age, clinical history, lesion location, and characteristic imaging findings often helps limit the differential diagnosis. Primary chest wall tumors can be classified as bone or soft-tissue tumors, with the latter being further classified into adipocytic tumors, vascular tumors, peripheral nerve sheath tumors, cutaneous lesions, fibroblastic-myofibroblastic tumors, and so-called fibrohistiocytic tumors, largely based on the 2002 World Health Organization classification. Within each category, it is possible to further limit the differential diagnosis with cross-sectional imaging. Information on specific features (eg, mineralization, fibrosis, hemosiderin deposits) and imaging patterns (eg, the "target sign" and "fascicular sign" seen in neurogenic tumors) can aid in making the diagnosis. Radiologists can achieve a sufficiently specific diagnosis of bone tumors and soft-tissue tumors if typical findings are present.


Asunto(s)
Neoplasias Óseas/diagnóstico , Neoplasias de los Tejidos Blandos/diagnóstico , Neoplasias Torácicas/diagnóstico , Pared Torácica , Neoplasias Óseas/diagnóstico por imagen , Neoplasias Óseas/patología , Medios de Contraste , Diagnóstico Diferencial , Humanos , Imagen por Resonancia Magnética , Neoplasias de los Tejidos Blandos/diagnóstico por imagen , Neoplasias de los Tejidos Blandos/patología , Neoplasias Torácicas/diagnóstico por imagen , Neoplasias Torácicas/patología , Pared Torácica/diagnóstico por imagen , Pared Torácica/patología , Tomografía Computarizada por Rayos X
9.
Skeletal Radiol ; 40(8): 1047-55, 2011 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-21384198

RESUMEN

OBJECTIVE: To investigate the usefulness of the external rotation (ER) position on magnetic resonance (MR) arthrography for the diagnosis of superior labral anterior to posterior (SLAP) lesion. MATERIALS AND METHODS: Approval of institutional review board was obtained, and informed consent was waived. The MR arthrograms of 210 shoulders that were arthroscopically confirmed as SLAP lesion in 163 shoulders and intact superior labrum in 47 shoulders were retrospectively reviewed in each neutral and ER position for the diagnosis of SLAP lesion, the extent of distraction of the torn labrum, and the external rotation angle. The sensitivity, specificity, and diagnostic accuracy of MR arthrograms for determining SLAP lesion were assessed in each position. For the arthroscopically confirmed group, the diagnosis of SLAP lesion and the extent of distraction about the tear were compared between neutral and ER positions by Fisher's exact test and the paired t-test. The correlation between the external rotation angle and the diagnosis of SLAP lesion, and between the external rotation angle and the differences in the extent of distraction were evaluated in the ER position using the ANOVA test. RESULTS: Sensitivity and diagnostic accuracy of MR arthrography for SLAP lesion increased from 64.4% and 71.0% in the neutral position to 78.5% and 81.9% in the ER position, respectively, without change of specificity, which was 93.6% in both positions. The diagnosis of SLAP lesion was changed from negative to SLAP lesion in 16.0% of the arthroscopically confirmed group. Mean difference in the extent of distraction about the tear was 0.69 mm (range -1.40 ∼ 6.67 mm), which was statistically significant. There was no relationship between the external rotation angle and the diagnosis of SLAP lesion, and between the external rotation angle and the differences in the extent of distraction. CONCLUSION: Shoulder MR arthrography with additional ER positioning helps in the diagnosis of SLAP lesion and provides information about the displaceability of the torn labrum.


Asunto(s)
Imagen por Resonancia Magnética/métodos , Lesiones del Hombro , Adolescente , Adulto , Anciano , Análisis de Varianza , Artroscopía , Medios de Contraste , Femenino , Humanos , Interpretación de Imagen Asistida por Computador , Masculino , Meglumina , Persona de Mediana Edad , Compuestos Organometálicos , Posicionamiento del Paciente , Rotación , Sensibilidad y Especificidad , Articulación del Hombro/patología
10.
J Clin Rheumatol ; 17(7): 365-7, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21946461

RESUMEN

Intervertebral disk calcification in children is an uncommon self-limiting disease, which can cause symptoms like neck pain or torticollis, and can be treated with conservative management. The calcified disk material can herniate anteriorly, inducing dysphagia, or herniate posteriorly, causing neurologic symptoms secondary to spinal cord compression. We report computed tomography and magnetic resonance findings of a symptomatic intervertebral disk calcification at the C2-3 level with retropharyngeal edema caused by anterior herniation of calcified material in a 7-year-old boy.


Asunto(s)
Calcinosis/diagnóstico , Edema/diagnóstico , Desplazamiento del Disco Intervertebral/diagnóstico , Enfermedades Faríngeas/diagnóstico , Infecciones del Sistema Respiratorio/complicaciones , Enfermedades de la Columna Vertebral/diagnóstico , Antibacterianos/uso terapéutico , Antiinflamatorios/uso terapéutico , Reposo en Cama , Calcinosis/terapia , Vértebras Cervicales , Niño , Edema/terapia , Estudios de Seguimiento , Humanos , Desplazamiento del Disco Intervertebral/terapia , Imagen por Resonancia Magnética , Masculino , Enfermedades Faríngeas/terapia , Tomografía Computarizada por Rayos X , Tracción , Rayos X
11.
Skeletal Radiol ; 39(12): 1205-9, 2010 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-20401480

RESUMEN

OBJECTIVE: To evaluate the anomalous insertion of the pectoralis minor tendon with absence of the coracohumeral ligament on MR arthrography and to demonstrate the associated findings seen with this anatomical variation. MATERIALS AND METHODS: We retrospectively reviewed the 335 MR arthrograms of the shoulder joint (mean age 37.8 years) performed from March 2000 to February 2008. Images were evaluated with attention to anomalous insertion of the pectoralis minor tendon and the coracohumeral ligament. RESULTS: Anomalous insertion of the pectoralis minor tendon was demonstrated in 5 out of 335 shoulders (1.5%). The pectoralis minor tendons crossed over the coracoid process and attached directly to a glenohumeral joint capsule, and the coracohumeral ligament was absent in these 5 patients. In these patients, injected contrast material was noted to extend over the coracoid process along the course of the pectoralis minor tendon. Among 5 patients, 3 patients (60%) were diagnosed with SLAP (superior labrum anterior to posterior) lesions. CONCLUSION: Anomalous insertion of the pectoralis minor tendon to the glenohumeral joint capsule and associated absence of the coracohumeral ligament is well demonstrated on MR arthrography. It is an unusual variant of the pectoralis minor muscle insertion, and may be a possible contributing factor in the development of a SLAP lesion.


Asunto(s)
Húmero/anomalías , Ligamentos Articulares/anomalías , Imagen por Resonancia Magnética/métodos , Músculos Pectorales/anomalías , Manguito de los Rotadores/anomalías , Adolescente , Adulto , Anciano , Medios de Contraste/administración & dosificación , Femenino , Humanos , Masculino , Meglumina/administración & dosificación , Persona de Mediana Edad , Compuestos Organometálicos/administración & dosificación , Estudios Retrospectivos , Ácidos Triyodobenzoicos/administración & dosificación
12.
PLoS One ; 13(10): e0205111, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30278069

RESUMEN

PURPOSE: To investigate the difference between sonographic findings in extensor pollicis longus tendons rupture and other finger tendons rupture in patients sustaining hand and wrist trauma. METHODS: Twenty-four patients who presented with signs and symptoms clinically suspicious for tendon injury and surgically confirmed tendon rupture were included in this study. We analyzed 6 sonographic features: discontinuity of the tendon, pseudomass formation, decreased echogenicity of the tendon, retraction of the ruptured tendon, fluid collection within the tendon sheath, and the motion of the tendon. We compared the sonographic features of ruptured extensor pollicis longus tendons with the other ruptured finger tendons. RESULTS: Discontinuity of the tendon was the most common sonographic findings and retraction of the ruptured tendon was the second most common findings. Fourteen of 16 cases with a dynamic study on sonography showed loss of normal motion of the tendon. Pseudomass formation was the second most common feature in ruptured extensor pollicis longus tendons, in contrast to the other ruptured finger tendons (p < 0.05). CONCLUSION: Using ultrasonography, detection of discontinuity of the tendon, retraction of the ruptured tendon, and limitation of tendon motion could be very helpful for diagnosing a tendon rupture in hand and wrist trauma. Pseudomass formation could be more specific for diagnosing extensor pollicis longus tendon ruptures compared with other finger tendons.


Asunto(s)
Traumatismos de los Dedos/diagnóstico por imagen , Rotura/diagnóstico por imagen , Traumatismos de los Tendones/diagnóstico por imagen , Tendones/diagnóstico por imagen , Ultrasonografía , Traumatismos de la Muñeca/diagnóstico por imagen , Adolescente , Adulto , Anciano , Diagnóstico Diferencial , Femenino , Traumatismos de los Dedos/cirugía , Dedos/diagnóstico por imagen , Dedos/cirugía , Humanos , Masculino , Persona de Mediana Edad , Rango del Movimiento Articular , Estudios Retrospectivos , Rotura/cirugía , Traumatismos de los Tendones/cirugía , Tendones/cirugía , Traumatismos de la Muñeca/cirugía , Adulto Joven
13.
Ann Rehabil Med ; 42(6): 814-821, 2018 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-30613074

RESUMEN

OBJECTIVE: To suggest rotation angles of fluoroscopy that can bypass the carotid sheath according to vertebral levels for cervical transforaminal epidural steroid injection (TFESI). METHODS: Patients who underwent cervical spine magnetic resonance imaging (MRI) from January 2009 to October 2017 were analyzed. In axial sections of cervical spine MRI, three angles to the vertical line (α, angle not to insult carotid sheath; ß, angle for the conventional TFESI; γ, angle not to penetrate carotid artery) were measured. RESULTS: Alpha (α) angles tended to increase for upper cervical levels (53.3° in C6-7, 65.2° in C5-6, 75.3° in C4-5, 82.3° in C3-4). Beta (ß) angles for conventional TFESI showed a constant value of 45° to 47° (47.5° in C6-7, 47.4° in C5-6, 45.7° in C4-5, 45.0° in C3-4). Gamma (γ) angles increased at higher cervical levels as did α angles (25.2° in C6-7, 33.6° in C5-6, 43.0° in C4-5, 56.2° in C3-4). CONCLUSION: The risk of causing injury by penetrating major vessels in the carotid sheath tends to increase at upper cervical levels. Therefore, prior to cervical TFESI, measuring the angle is necessary to avoid carotid vessels in the axial section of CT or MRI, thus contributing to a safer procedure.

14.
J Orthop Surg Res ; 13(1): 181, 2018 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-30029690

RESUMEN

BACKGROUND: Graft shrinkage or radial extrusion is a reported complication after meniscus allograft transplantation (MAT). Whether shrinkage or extrusion progress after surgery and whether they are associated with the clinical outcome of MAT remain debatable. In this study, graft shrinkage and extrusion were measured in the coronal and sagittal planes using serial postoperative magnetic resonance imaging (MRI). The purpose of this study was to evaluate if graft shrinkage or extrusion is correlated to the clinical outcome of MAT. METHODS: MRIs acquired at 3 and 12 months postoperatively in 30 patients (21 men and 9 women) who underwent MAT (6 medial and 24 lateral menisci) from 2010 to 2016 were analyzed. Two orthopedic surgeons and two musculoskeletal specialized radiologists each performed the MRI measurements. Allograft shrinkage was measured by the width and thickness of the graft at the coronal and sagittal planes. To determine the graft extrusion, distances between the proximal tibia cartilage margin and the extruded graft margin were measured in both coronal (either lateral or medial) and sagittal (both anterior and posterior) plane and relative percentage of extrusion (RPE) were calculated. Subjective International Knee Documentation Committee (IKDC) scores at 12 months were evaluated as a clinical outcome measurement, and correlations between shrinkage or extrusion of allograft and IKDC score were analyzed. RESULTS: In the coronal plane, radial RPE averaged 43.6% at postoperative 3 months, but there was no significant progression of extrusion at 12 months (average 42.0%) (P = 0.728). In the sagittal plane, there were no significant progressions of anterior and posterior RPE (P = 0.487 and 0.166, respectively) between postoperative 3 and 12 months. Shrinkage was calculated by multiplying the width and height of the three sections and summing these values. There was no significant progression of shrinkage between postoperative 3 and 12 months (P = 0.150). RPE in the radial (R = 0.147, P = 0.525), anterior (R = 0.249, P = 0.264), and posterior (R = 0.230, P = 0.315) directions and shrinkage (R = 0.176, P = 0.435) were not correlated to IKDC score at postoperative 12 months. CONCLUSIONS: In the coronal and sagittal planes, extrusion and shrinkage did not progress from 3 months to 1 year. Extrusion and shrinkage had no correlation with early clinical outcomes. This finding suggests that graft extrusion or shrinkage may be not a great concern especially in early postoperative period of MAT, and multiple, serial MRI may be not necessary.


Asunto(s)
Lesiones de Menisco Tibial , Trasplante Homólogo , Adolescente , Adulto , Aloinjertos , Femenino , Humanos , Articulación de la Rodilla , Imagen por Resonancia Magnética , Masculino , Meniscos Tibiales/cirugía , Persona de Mediana Edad , Radiografía , Lesiones de Menisco Tibial/diagnóstico por imagen , Lesiones de Menisco Tibial/cirugía , Adulto Joven
15.
Ultrasonography ; 36(4): 363-369, 2017 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-28494524

RESUMEN

PURPOSE: The purpose of this study was to evaluate the ultrasonographic findings associated with posterior interosseous nerve (PIN) syndrome. METHODS: Approval from the Institutional Review Board was obtained. A retrospective review of 908 patients' sonographic images of the upper extremity from January 2001 to October 2010 revealed 10 patients suspicious for a PIN abnormality (7 male and 3 female patients; mean age of 51.8±13.1 years; age range, 32 to 79 years). The ultrasonographic findings of PIN syndrome, including changes in the PIN and adjacent secondary changes, were evaluated. The anteroposterior diameter of the pathologic PIN was measured in eight patients and the anteroposterior diameter of the contralateral asymptomatic PIN was measured in six patients, all at the level immediately proximal to the proximal supinator border. The size of the pathologic nerves and contralateral asymptomatic nerves was compared using the Mann-Whitney U test. RESULTS: Swelling of the PIN proximal to the supinator canal by compression at the arcade of Fröhse was observed in four cases. Swelling of the PIN distal to the supinator canal was observed in one case. Loss of the perineural fat plane in the supinator canal was observed in one case. Four soft tissue masses were noted. Secondary denervation atrophy of the supinator and extensor muscles was observed in two cases. The mean anteroposterior diameter of the pathologic nerves (n=8, 1.79±0.43 mm) was significantly larger than that of the contralateral asymptomatic nerves (n=6, 1.02±0.22 mm) (P=0.003). CONCLUSION: Ultrasonography provides high-resolution images of the PIN and helps to diagnose PIN syndrome through visualization of its various causes and adjacent secondary changes.

16.
Medicine (Baltimore) ; 96(39): e8069, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28953625

RESUMEN

BACKGROUND: Solitary myofibroma of the spine is extremely rare, particularly among adults. To the best of our knowledge, only 3 cases affecting lumbar vertebrae have been reported in the English language literature. Of them, only 1 case was an adult case of solitary myofibroma affecting the L1 vertebra. METHODS: We report a case of solitary myofibroma affecting the L5 vertebra in an 18-year-old man and the postoperative imaging of solitary myofibroma for the first time. Conventional radiographs demonstrated an expansile osteolytic lesion with thinned cortex and marginal sclerosis. Computed tomography (CT) showed a purely osteolytic expansile lesion with partial disappearance of thinned cortex. MRI of the lesion revealed an isointense signal on T1-weighted images, an inhomogeneous slightly hyperintense signal on T2-weighed images, and homogeneous avid enhancement with gadolinium. RESULTS: Surgical excision was performed and the lesion was diagnosed as solitary myofibroma on pathological examination. One-year follow-up postoperative CT demonstrated decreased size of the osteolytic lesion with sclerotic change. Four-year follow-up postoperative MRI revealed complete resolution of the lesion replaced by normal fatty marrow. CONCLUSION: If a benign-looking expansile osteolytic lesion reveals a homogeneously isointense signal on T1-weighted image, inhomogeneous slightly hyperintense signal on T2-weighted image, and homogeneous avid enhancement with gadolinium, solitary myofibroma should be considered in the differential diagnosis of spine bone tumors. It can be resolved completely.


Asunto(s)
Vértebras Lumbares/diagnóstico por imagen , Miofibroma/diagnóstico por imagen , Neoplasias de la Columna Vertebral/diagnóstico por imagen , Adolescente , Estudios de Seguimiento , Humanos , Vértebras Lumbares/patología , Vértebras Lumbares/cirugía , Imagen por Resonancia Magnética , Masculino , Miofibroma/patología , Miofibroma/cirugía , Neoplasias de la Columna Vertebral/patología , Neoplasias de la Columna Vertebral/cirugía , Tomografía Computarizada por Rayos X
17.
Stem Cell Res Ther ; 8(1): 262, 2017 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-29141662

RESUMEN

BACKGROUND: Adipose tissue-derived mesenchymal stem cells (AT-MSCs) offer potential as a therapeutic option for chronic discogenic low back pain (LBP) because of their immunomodulatory functions and capacity for cartilage differentiation. The goal of this study was to assess the safety and tolerability of a single intradiscal implantation of combined AT-MSCs and hyaluronic acid (HA) derivative in patients with chronic discogenic LBP. METHODS: We performed a single-arm phase I clinical trial with a 12-month follow-up and enrolled 10 eligible chronic LBP patients. Chronic LBP had lasted for more than 3 months with a minimum intensity of 4/10 on a visual analogue scale (VAS) and disability level ≥ 30% on the Oswestry Disability Index (ODI). The 10 patients underwent a single intradiscal injection of combined HA derivative and AT-MSCs at a dose of 2 × 107 cells/disc (n = 5) or 4 × 107 cells/disc (n = 5). Safety and treatment outcomes were evaluated by assessing VAS, ODI, Short Form-36 (SF-36), and imaging (lumbar spine X-ray imaging and MRI) at regular intervals over 1 year. RESULTS: No patients were lost at any point during the 1-year clinical study. We observed no procedure or stem cell-related adverse events or serious adverse events during the 1-year follow-up period. VAS, ODI, and SF-36 scores significantly improved in both groups receiving both low (cases 2, 4, and 5) and high (cases 7, 8, and 9) cell doses, and did not differ significantly between the two groups. Among six patients who achieved significant improvement in VAS, ODI, and SF-36, three patients (cases 4, 8, and 9) were determined to have increased water content based on an increased apparent diffusion coefficient on diffusion MRI. CONCLUSIONS: Combined implantation of AT-MSCs and HA derivative in chronic discogenic LBP is safe and tolerable. However, the efficacy of combined AT-MSCs and HA should be investigated in a randomized controlled trial in a larger population. TRIAL REGISTRATION: ClinicalTrials.gov NCT02338271 . Registered 7 January 2015.


Asunto(s)
Ácido Hialurónico/uso terapéutico , Degeneración del Disco Intervertebral/terapia , Dolor de la Región Lumbar/terapia , Trasplante de Células Madre Mesenquimatosas , Células Madre Mesenquimatosas/citología , Tejido Adiposo/citología , Tejido Adiposo/fisiología , Adulto , Diferenciación Celular , Enfermedad Crónica , Femenino , Estudios de Seguimiento , Humanos , Inyecciones Intralesiones , Disco Intervertebral/efectos de los fármacos , Disco Intervertebral/patología , Disco Intervertebral/fisiopatología , Degeneración del Disco Intervertebral/patología , Degeneración del Disco Intervertebral/fisiopatología , Dolor de la Región Lumbar/patología , Dolor de la Región Lumbar/fisiopatología , Masculino , Células Madre Mesenquimatosas/fisiología , Persona de Mediana Edad , Dimensión del Dolor , Seguridad del Paciente , Trasplante Autólogo , Resultado del Tratamiento , Agua/metabolismo
18.
Radiographics ; 26(5): 1289-304, 2006.
Artículo en Inglés | MEDLINE | ID: mdl-16973766

RESUMEN

Superficial soft-tissue masses are among the most common indications for imaging of the extremities. A broad array of benign and malignant processes may be manifested in palpable cutaneous or subcutaneous masses or nodules. Most such lesions are treated with surgical excision, but some may be conservatively managed. The lesions can be differentiated according to their location in one or more skin layers (epidermis, dermis, and subcutis), their histologic composition, and the associated anatomic abnormality or disease process. Because the imaging characteristics of many benign soft-tissue lesions overlap with those of malignant ones, knowledge of the patient's clinical history (including any laboratory test results) and direct visual examination of the lesion often are important for differentiation. Histologic analysis may be necessary to achieve a definitive diagnosis.


Asunto(s)
Aumento de la Imagen/métodos , Imagen por Resonancia Magnética/métodos , Neoplasias Cutáneas/diagnóstico , Neoplasias de los Tejidos Blandos/diagnóstico , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Femenino , Humanos , Masculino , Persona de Mediana Edad , Guías de Práctica Clínica como Asunto , Pautas de la Práctica en Medicina
19.
Korean J Radiol ; 14(5): 818-22, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-24043979

RESUMEN

Desmoid type fibromatosis is a benign fibroblastic tumor arising from the fascia or musculoaponeurosis. It may occur in various locations, but most commonly in the shoulder girdle and neck; to our knowledge, there has been no reported case originating from a facet joint of the spine. We report CT and MR imaging findings of a desmoid type fibromatosis, involving the facet joint of the L3-4 spine with bone involvement.


Asunto(s)
Fibromatosis Agresiva/diagnóstico , Vértebras Lumbares , Neoplasias de la Columna Vertebral/diagnóstico , Articulación Cigapofisaria , Adulto , Biopsia , Humanos , Imagen por Resonancia Magnética , Masculino
20.
Yonsei Med J ; 51(3): 451-3, 2010 May.
Artículo en Inglés | MEDLINE | ID: mdl-20376901

RESUMEN

This report discusses a pregnancy case following a series of two consecutive magnetic resonance imaging-guided focused ultrasound surgery (MRgFUS) procedures for the treatment of two different myomas in an individual patient. Both procedures were completed without adverse events, and the patient conceived naturally four months after treatment. At 39 weeks, she gave birth to a healthy baby girl, via a vaginal delivery. There were no complications in the pregnancy or during labor.


Asunto(s)
Imagen por Resonancia Magnética Intervencional/métodos , Mioma/cirugía , Cirugía Asistida por Computador/métodos , Neoplasias Uterinas/cirugía , Adulto , Femenino , Humanos , Embarazo , Resultado del Embarazo
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