Quiste óseo aneurismático localizado en el techo acetabular en un varón de 11 años / Aneurysmal bone cyst located on the acetabular roof in an 11-year-old male

Resumen: El quiste óseo aneurismático es una tumoración benigna poco común, de aparición en la infancia generalmente y a nivel de extremidades. El tratamiento más habitual consiste en el curetaje y relleno con injerto. No obstante, localizaciones poco accesibles a la cirugía suponen un reto terapéutico. Se presenta el caso de un paciente de 11 años con cojera y dolor en cadera derecha sin antecedente traumático ni infeccioso. En los estudios de imagen con TAC y RM se evidencia una lesión lítica expansiva que ocupa todo el techo del acetábulo y pala ilíaca derecha, sugestiva de un quiste óseo aneurismático presentando fractura acetabular asociada. Se realizó una biopsia que confirmó el diagnóstico. Se trató mediante embolización guiada por angiografía debido al gran volumen y alto riesgo de fractura, después del curetaje y relleno con aloinjerto evolucionó satisfactoriamente y el paciente se encuentra asintomático al año de la intervención.

Abstract: The aneurysmal bone cyst is a benign rare tumor, which usually develops during childhood and it's more often found in limbs. The most accepted treatment consists in curetagge and filling with graft. However, certain locations may be inaccesible for surgery and represent therapeutical challenges. We present the case of an 11 year-old male patient with limping and right hip pain without any traumatic nor infectious record. In the image studies with CT and MRI a lytic and expansive lession was found in the upper part of the right acetabulum and right iliac wing, all of which suggested an aneurysmal bone cyst with an associated acetabular fracture. A biopsy was performed which confirmed the diagnosis. He was treated with a CT-guided embolization and, due to its size, curetagge and allograft filling afterwards. He was asymptomatic after1 year of follow-up.

Cisto ósseo aneurismático em tecido mole em um cão - relato de caso / Aneurysmal bone cyst in soft tissue in a dog - Case Report

Este trabalho descreve o diagnóstico e o tratamento instituído para um cão com um raro cisto ósseo aneurismático originado em tecido mole. O paciente foi apresentado para atendimento no Hospital de Clínicas Veterinárias da Universidade Federal do Rio Grande do Sul devido à dificuldade de locomoção, fraqueza nos membros pélvicos e disquesia havia 15 dias. Já estava recebendo tratamento medicamentoso sem sucesso. Ao exame clínico, notou-se aumento de volume sólido na região perineal direita, e foram solicitados exames complementares de imagem. A radiografia da região sugeriu hérnia perineal direita ou neoplasia. O cão foi encaminhado para cirurgia, na qual foi removida uma estrutura tumoral, arredondada, de aspecto ossificado. O exame histopatológico diagnosticou a estrutura como um cisto ósseo aneurismático em tecido mole, e o paciente recuperou-se totalmente após a excisão cirúrgica.(AU)

This paper describes the diagnosis and treatment of a dog with a rare aneurysmal bone cyst in soft tissue. The patient was attended in the Veterinary Clinic Hospital at the Fedral University of Rio Grande do Sul due to limited mobility, weakness in hind limbs, and dyschezia for 15 days. It was already receiving medical treatment without success. Upon clinical examination a solid increase volume in the right perineal region was detected, and complementary imaging tests were requested. Radiography of the region suggested right perineal hernia or neoplasia. The dog was submitted to surgery, and a rounded and ossified tumoral structure was removed. The histopathological exam diagnosed the structure as an aneurysmal bone cyst in soft tissue, and the patient recovered fully after surgical excision.(AU)

Quiste óseo aneurismático mandibular / Aneurysmal mandibular bone cyst

El quiste óseo aneurismático es definido como una lesión osteolítica expansiva que consiste en espacios llenos de sangre y canales divididos por tabiques de tejido conectivo, los cuales contienen tejido osteoide y células gigantes multinucleadas. El objetivo es presentar un caso clínico poco común de un quiste óseo aneurismático de la región del cuerpo mandibular. Se trata de una paciente femenina de 39 años de edad que acudió a consulta externa del Servicio de Cirugía Maxilofacial del Hospital Universitario General Calixto García por aumento de volumen en región mandibular derecha y dolor intenso de 1 mes de evolución. Radiográficamente se detectó un área radiolúcida unilocular de bordes bien definidos; se realizó curetaje de la cavidad, y estudio histopatológico de la lesión que informó la presencia de un quiste óseo aneurismático. Se concluye que el quiste óseo aneurismático es más común en los huesos largos y en la región del ángulo mandibular en el esqueleto facial, por lo que la presentación de este en el cuerpo mandibular resulta de interés(AU)

The aneurysmal bone cyst is defined as an expansive osteolytic lesion consisting of blood-filled spaces and divided by partitions of connective tissue, which contain bone tissue and giant cells channels. The objective is to present a rare case of an aneurysmal bone cyst in the region of the mandibular body. This is a case of a 39-year-old female who attended the outpatient Maxillofacial Surgery Service of General Calixto Garcia University Hospital due to an increased volume in right mandibular region and intense pain of a month, both in evolution. Radiographically, a unilocular radiolucent area with well-defined edges was detected; curettage of the cavity and histopathological examination of the lesion were performed, which reported the presence of an aneurysmal bone cyst. It is concluded that the aneurysmal bone cyst is most commonly presented in the long bones and in the region of the mandibular angle in the facial skeleton, so the presentation of this in the mandibular body is of interest(AU)

Tratamiento de quistes óseos aneurismáticos con aloinjerto / Treatment of aneurysmal bone cysts with allograft

Antecedentes: Los pacientes con quiste óseo aneurismático plantean dificultades diagnósticas y terapéuticas. Se han descrito múltiples opciones terapéuticas. Objetivos: Evaluar los resultados obtenidos en pacientes tratados con curetaje y relleno con aloinjerto óseo. Materiales y Métodos: Se analizaron 16 quistes, correspondientes a 15 pacientes, con un seguimiento mínimo de 28 meses y una mediana de seguimiento de 83 meses. Resultados: La media de la edad era de 10 años (rango 3-16). La principal complicación fue la recidiva (37,5%), que fue más frecuente cuando existía compromiso fisario (62,5% frente al 12,5% sin compromiso; p = 0,05). La frecuencia de recidiva no varió en ambos sexos, para las distintas edades analizadas y respecto al uso o no de fresa de alta velocidad. Conclusión: Consideramos que el tratamiento realizado es seguro, pero tiene una alta tasa de recidivas, similar a las publicadas en otras series.

Backround: Patients with aneurysmal bone cyst pose diagnostic and therapeutic difficulties. Multiple therapeutic options have been described. Objective: To evaluate the results obtained in patients treated with curettage and filling with bone allograft. Methods: Sixteen cysts, corresponding to 15 patients were evaluated, with a minimum follow-up of 28 months and a median follow-up of 83 months. Results: Average age was 10 years (range 3-16). The main complication was recurrence in 37.5% of patients, being more frequent with physeal involvement (62.5% vs. 12.5% without involvement; p = 0.05). The recurrence rate was unchanged for both sexes, for different ages and regarding the use or not of high-speed burr. Conclusion: We think that the treatment performed is safe, but recurrence rate is high, similar to that reported in other series.

Quiste óseo aneurismático sólido del raquis dorsal / Solid aneurysmal bone cyst of dorsal spine

El quiste óseo aneurismático sólido es un tumor de naturaleza neoplásica indefinida, de comportamiento benigno, crecimiento rápido y agresivo. Representa menos del 8 % de todos los quistes óseos aneurismáticos. Se presenta un caso de quiste óseo aneurismático sólido de mediastino posterior con toma espinal torácica. La ausencia de signos característicos en las pruebas de imagen y la presencia de rasgos similares al tumor de células gigantes y el osteosarcoma, hacen imprescindible la confirmación anatomopatológica para un tratamiento adecuado de la enfermedad. La exéresis quirúrgica total de la tumoración, el aporte de injerto óseo y la fijación del segmento afecto constituyen el procedimiento de elección.

The solid aneurysmal bone cyst is a malignant tumor of undefined nature, benign behavior; it has fast and aggressive growth. It represents less than 8 % of all aneurysmal bone cysts. A case of posterior mediastinum solid aneurysmal bone cyst with thoracic spinal making is presented here. The absence of characteristic signs in the imaging and the presence of similar features of giant cell tumor and osteosarcoma, make it imperative the pathologic confirmation for proper treatment of the disease. Total surgical excision of the tumor, the bone grafting and fixation segment affection are the procedures of choice.

Le kyste osseux anévrismal solide est une tumeur de nature néoplasique indéfinie, caractérisée par un comportement bénin et une croissance rapide et agressive. Il représente moins de 8 % de tous les kystes osseux anévrismaux. Un cas de kyste osseux anévrismal solide au niveau de médiastin postérieur (d’atteinte spinale thoracique) est présenté. L’absence de signes caractéristiques dans l’imagerie RM et la présence de traits similaires à la tumeur à cellules géantes et à l’ostéosarcome rendent nécessaire la confirmation anatomopathologique pour un traitement approprié de cette pathologie. L’exérèse totale de la tumeur, la greffe osseuse et la fixation du segment affecté constituent la technique opératoire de choix.

Resección de quiste óseo aneurismático en húmero proximal con aplicación de injerto peroneo no vascularizado: Presentación de un caso / Resection of an aneurysmal bone cyst in the proximal humerus with a non-vascularized fibular graft: Case report

El quiste óseo aneurismático es una lesión benigna que afecta la médula de huesos largos, supone 6% de las lesiones óseas primarias y puede surgir secundariamente con otros tumores óseos benignos o malignos. Presentamos el caso de una mujer de siete años de edad con un quiste óseo aneurismático, diagnosticado por clínica, radiología, tomografía axial computarizada y confirmado por histopatología. Se le realizó resección con técnica eggshell e injerto óseo no vascularizado de peroné izquierdo, su evolución fue satisfactoria hasta los cuatro años de operada, lo que concuerda con lo descrito en la literatura mundial.

An aneurysmal bone cyst is a benign lesion involving the marrow of long bones; it accounts for 6% of primary bone lesions and may occur as a secondary lesion with other benign or malignant bone tumors. We describe herein the case of a seven year-old female with an aneurysmal bone cyst which was diagnosed clinically, radiographically and with a CAT scan, and confirmed with histopathology. Resection was performed using the eggshell technique and a non-vascularized left fibular bone graft. The patient did well up to the fourth postoperative year, which is consistent with what has been reported in world literature.

Aneurysmal Bone Cyst of Mandible: A Case Report.

Aneurysmal bone cysts are rare benign lesions of bone tissue, infrequent in the craniofacial skeleton about other structures like long bones or the spine. The rare jaw lesions encountered in the mandible and maxilla. On the other side, it is at the same time very exciting in terms of its differential diagnosis with other types of mandibular or maxillary bone lesions. We present the case of a 45-year-old female patient with an aneurysmatic cyst located at the left angle of the mandible describing the treatment for the same i.e. surgical excision and hemi mandibulectomy with reconstruction. We have focused on the differential diagnosis, mainly with the malignancies, which can be found at this location, along with therapeutic options classically described for these kinds of pathologies. In our patient, the surgical excision and hemi mandibulectomy allowed a complete removal of the lesion and recon plate was placed for rehabilitation.

Quiste óseo aneurismático / Aneurysmal bone cyst

El quiste óseo aneurismático (QOA) es una lesión benigna rara en huesos maxilares, su mayor frecuencia es en huesos largos del esqueleto y columna vertebral. Algunos autores especulan que el origen sea por trauma, mala formación o un neoplasma. El aspecto radiográfico puede mostrar desde una imagen difusa hasta una imagen bien definida, muy semejante a las otras lesiones de los maxilares volviendo el diagnóstico diferencial amplio. Con la destrucción del córtex óseo puede todavía formar una imagen reaccional del periostio en forma de rayos de sol, característico de una lesión maligna. En este estudio, se presenta caso de paciente femenino, 17 años de edad, que buscó el Servicio de Cirugía y Traumatología Buco maxilofacial del Hospital São Vicente de Paulo-RS, que presentó dolor y aumento de volumen en la mandíbula. Informó que hace cerca de un año empezó a sentir malestar en la región junto al ángulo mandibular derecho, lo cual fue progresivamente aumentando de volumen. El aspecto radiográfico acordaba una lesión maligna. Después de la confirmación histopatológica de QOA, el tratamiento seleccionado para el caso fue quirúrgico conservador, con legrado de la cavidad ósea, y fue mantenido en control posoperatorio de rutina con 6 y 18 meses. En las radiografías panorámicas realizadas se verifica la neoformación ósea y cura del caso(AU)

The aneurysmal bone cyst (ABC) is a benign and rare lesion in maxillary bones, is more frequent in largo bones of skeletal and spinal column. Some authors speculate about that its origin be traumatic, malformation of neoplasm. The radiographic appearance may to show from a diffuse image up to a well defined image very similar to the other maxillary lesions turning wide the differential diagnosis. With destruction of the bon cortex it is possible to create a reaction image of periosteum in sunbeams characteristic of malignant lesion. This is the case of a female patient aged 17 seeking help in the Bucco-maxillofacial Surgery and Traumatology Service of the São Vicente de Paulo Hospital _ RS, presenting with pain and an increased mandibular volume. She manifested that around one year she began to feel a discomfort next to he right mandibular angle, which was progressively increasing the volume. The radiographic appearance resembled a malignant lesion. After the histopathology verification of ABC, treatment choosed for this case was of type conservative surgical with bone cavity curettage and was maintained under systemic postoperative control for 6 and 18 months. In the taken panoramic radiographies is verified the bone neoformation and the cure of case(AU)

Paraplejia secundaria a quiste óseo aneurismático de columna torácica / Paraplegia due to aneurismatic bone cyst of the thoracic spine

Objectives: Case report of progressive paraparesis secondary to Aneurysmal Bone Cyst of thoracic spine presenting over 40 years. Describe diagnostic triad: clinical, imaging and anatomopathologic examination. Describe the choice of surgical treatment and clinical outcomes. Performed literature review of Spine Aneurysmal Bone Cyst.

Objetivo: Dar a conocer el caso de un paciente que presenta una paraparesia progresiva secundaria a quiste óseo aneurismático (QOA) de columna torácica de presentación sobre los 40 años. Describir la triada diagnóstica en patología tumoral: clínica, imágenes y estudio anatomopatológico. Describir la elección del tratamiento quirúrgico y los resultados clínicos del caso. Se realiza revisión de la literatura publicada de QOA de columna.

Aneurysmal bone cyst of pubis a rare presentation

Aneurysmal bone cyst is a benign usually expansile, solitary lytic lesion of bone; with blood filled cystic cavities, which tend to grow eccentrically. Such eccentric growth may, on occasion, attain considerable size before it is clinically recognized, particularly if the tumor arises in a deeply situated bone. Aneurysmal bone cyst of pubis is a rare entity. In the following case report, an aneurysmal bone cyst, originating from the superior pubic ramus, expanded into the groin and first manifested itself as a gradually increasing fullness in groin and pain especially with weight bearing. The size and location of this vascular tumor posed difficulties in treatment. It was managed by curettage with high speed burr and reconstruction of the defect with an iliac crest cancellous bone graft

Benign tumors and tumor-like lesions of the calcaneum: A study of 12 cases.

Benign tumors of the calcaneum are rare. Cystic lesions such as simple bone cysts and aneurysmal bone cysts are commonly seen. Aims and Objectives: To evaluate tumors of the calcaneum, which were seen over a 12-year period. Materials and Methods: We analyzed noninfectious, noninflammatory, benign lesions of the calcaneum seen in the Orthopedic Out Patient Department from 1991 to 2003. Twelve such tumors were encountered. There were 11 males and one female and their ages varied from 18 to 53 years with a median of 31. Data was collected from the histopathology reports, radiographs, and inpatient and outpatient records. One of the coauthors reviewed the histopathologic findings of all the tumors. Results: Twelve benign lesions were seen in 12 patients. In our series, cysts predominated, with three aneurysmal bone cysts and five simple bone cysts. The other benign tumors were: one fibrous dysplasia, one vascular hamartoma, one osteoblastoma, and one chondromyxoid fibroma. The bone cysts were treated by curettage, with or without bone grafting, except for one large aneurysmal bone cyst, which was treated by excision of the calcaneum. The postoperative function in this patient was good, with modified footwear. Conclusion: The calcaneum is an uncommon site for most bone tumors, and in our series, bone cysts were the most common benign lesions. Curettage and bone grafting or the use of bone substitutes can be effectively used in the treatment of symptomatic bone cysts of the calcaneum.

Outcome of percutaneous curettage for bone cysts in the upper extremities

To evaluate the bone healing and recurrence rate after percutaneous curettage of bone cysts in the upper extremities in children and young adolescents. Orthopaedic department at Jordan University Hospital -Amman. The study started from September 1998 to August 2007, treating 10 children [seven males and three females] with a mean age of 8.57 year [range 3 to 12.3 years].There were eight cysts in the humerus and two in the radius. The cases comprised 5 simple bone cysts [SBC] and 5 aneurysmal bone cysts [ABC] confirmed histopathologically. All cases were treated percutaneously under the guidance of image intensifier by the senior author under general anaesthesia. After a mean duration of follow-up of 2.84 years [range 15m- 4 years], complete healing of the bone cysts had occurred in all cases at the most recent radiograph. All patients returned to full activities and were asymptomatic. No early or late complications were encountered during the course of follow-up. The use of percutaneous curettage in the surgical treatment of benign bone cystic lesions in the upper extremities is an effective treatment to control local recurrences and enhance bony consolidation without using bone graft

Extraosseous aneurysmal cyst. A case presentation

We present a case of a soft tissue aneurysmal cyst [STAC] in a 13 year old girl. The lesion was detected in the left paraspinal lumbar region extending from the level of transverse process of 2[nd] lumbar vertebra to the transverse process of 4[th] lumbar vertebra. The lesion was investigated by plain X- ray, ultrasound, bone scan, computed tomography [CT], and magnetic resonance imaging [MRI]. Pathological examination has been done preoperatively by fine needle aspiration cytology [FNAC], and histologically after surgical excision

Quiste óseo aneurismático de la columna vertebral: reporte de un caso / Aneurysmal bone cyst of the spine: case report

El quiste óseo aneurismático es un tumor de naturaleza neoplásica indefinida, de comportamiento benigno, crecimiento rápido y ocasionalmente de comportamiento agresivo, cuyo tratamiento de elección es la resección completa, aunque existe el riesgo de sangrado transquirúrgico excesivo. Se presenta el caso de una paciente con deformidad en columna torácica, con parestesias y debilidad muscular progresivas en extremidades inferiores, que evolucionó hasta la parálisis de dichas extremidades e incontinencia de ambos esfínteres. Mediante estudios de gabinete se localizaron lesiones líticas en cuerpos vetebrales T7 a T9 e invasión a conducto raquídeo. Los estudios electrofisiológicos identificaron bloqueo completo de la vía somatosensorial. Previa biopsia incisional, se realizó resección de la lesión y estabilización de la columna toracolumbar. La paciente evolucionó sin mejoría de la función medular. Los hallazgos morfológicos correspondieron a quiste óseo aneurismático en T8. Esta lesión se localiza principalmente en huesos largos y con mucho menor frecuencia en la columna vertebral, donde puede provocar inestabilidad y compresión de la médula espinal. Es posible confundirla con otras neoplasias, por lo que el diagnóstico definitivo mediante biopsia es imprescindible a fin de establecer el plan terapéutico adecuado, que elimine el riesgo de recurrencia o secuelas neurológicas asociadas, y lograr la estabilidad adecuada de los segmentos vertebrales afectados.

The aneurysmal bone cyst (ABC) is a fast-growing tumor of undefined neoplastic nature. It is occasionally an aggressive benign lesion whose treatment of choice is a complete resection, even though the risk of profuse transoperative bleeding exists. We present a female patient with thoracic spine deformity, with progressive paresthesias and muscle weakness of lower extremities that evolved to paralysis of both lower extremities and sphincter incontinence. Based on radiographic films, lytic lesions were identified at T7 to T9 vertebrae as well as medullary space invasion. In electrophysiologic tests, a complete somatosensorial pathway block was reported. Prior to resection of the neoplastic lesion and thoracolumbar stabilization, an incisional biopsy was performed. There was no postoperative medullary functional improvement. Morphological findings corresponded to an aneurysmal bone cyst at T8. This lesion is mainly located in the long bones and less frequently of the spine, where instability and medullary compression may occur. It is possible to confuse this neoplasia with other lesions. Hence, definite diagnosis with biopsy is necessary for determining an adequate therapeutic plan to eradicate recurrence risk or associated neurologic sequelae, as well as to gain proper stability at the involved vertebral segments.

Cisto ósseo aneurismático na patela / Aneurysmal bone cyst of the patella

Relato de um caso de cisto ósseo aneurismático na patela cujo objetivo é propor uma opção de tratamento. Os tumores de patela são raros. Em revisões literárias de 1900 a 2000 foram levantadas 384 publicações. Lesões benignas são mais comuns (73%), principalmente o tumor de células gigantes (33%). O cisto ósseo aneurismático corresponde a apenas 4%. Paciente do sexo masculino, 32 anos, atendido na Oncologia Ortopédica da FMABC em Novembro de 2004, com a dor e edema em joelho esquerdo há três meses, claudicação e perda da amplitude de flexo-extensão, sem melhora após punções e uso de antiinflamatório não hormonal. O Raio X apresentava imagem lítica, expansiva, infiltrativa com septações, sem envolvimento da cortical. A Tomografia Computadorizada mostrou lesão infiltrativa central na patela. A biópsia percutânea confirmou o diagnóstico de cisto ósseo aneurismático. O tratamento foi patelectomia total por comprometimento de mais de 90% da patela. Atualmente em acompanhamento ambulatorial, com melhora do quadro clínico, embora com diminuição da força extensora. Trata-se de uma lesão pseudotumoral benigna de etiologia desconhecida que pode afetar qualquer parte do esqueleto, extremamente rara na patela. A incidência é de 1% em relação a todos as neoplasias ósseas primárias, e de 4% em relação aos tumores da patela. As opções de tratamento são curetagem, ressecção parcial ou total e amputação do membro. A radioterapia é alvo de discussão pelo risco de degeneração sarcomatosa. A taxa de recorrência é próxima a 0% na excisão completa, podendo chegar a 59% na curetagem, segundo a literatura.

Cough is a very common symptom and it has been considered the second major cause of visits to the doctor. This emphasizes the importance to identify and to treat appropriately the etiological factors that have a relationshipwith this symptom. Several diseases that attack the upper airway are associated to the chronic cough, beingrare the occurrence of supraglottic cysts as an aetiology of this symptom. This paper report a case of a patientwith chronic cough due to a cyst on the tongue basis. The patient was submitted to a surgery and the cyst was completely extracted. The symptom disappeared completely after the procedure.

Cisto ósseo aneurismático vertebral: estudo de três casos / Vertebral aneurysmatic bone cyst: study of three cases

O cisto ósseo aneurismático é lesão hipervascularizada, benigna, localmente destrutiva pelo seu crescimento progressivo, de incidência maior na segunda década de vida. Acomete preferencialmente ossos longos e vértebras. Sua sintomatologia varia desde dor e edema locais, até presença de sintomas neurológicos quando de sua localização vertebral. Relatamos três casos de cisto ósseo aneurismático vertebral acometendo crianças, todas com alterações neurológicas. Os diagnósticos foram firmados através de tomografia computadorizada e/ou ressonância magnética, sendo os pacientes submetidos a cirurgia para ressecção do tumor. Em um dos casos foi realizada a embolização arterial seletiva pré-operatória da lesão. Os três pacientes evoluíram satisfatoriamente, com melhora do quadro neurológico, demonstrando a eficácia da técnica microcirúrgica para ressecção de tumor raquimedular. Discutimos a evolução dos casos e os tratamentos existentes na atualidade.

Quiste aneurismático del maxilar superior. Reporte de un caso / Aneurysmal bone cyst of the maxilla. Report of one case

Aneurysmal bone cysts are benign fibro osseous lesions, rarely present in maxillary region. We report the CT and morphological findings of aneurysmal bone cyst of the maxilla in a 15 years old female. The patient was subjected to a maxillectomy, preserving the orbit floor. The postoperative evolution has been uneventful. The tumor mainly involved the maxillary sinus with extension to the orbit wall and osseous palate. Very few cases of aneurysmal bone cysts of the maxilla have been reported in the literature.

Quiste oseo aneurismático espinal en los niños / Aneurysmal bone cyst of the spine in children

Introducción: El quiste óseo aneurismático es una lesión seudotumoral infrecuente que afecta preferentemente a personas jóvenes. Es una distrofia ósea seudotumoral benigna, osteolítica y expansiva, constituida por espacios de tamaño variable, llenos de sangre, separados por tabiques de tejido conectivo, que contienen trabéculas de tejido óseo u osteoide y células gigantes de tipo osteoclástico. Materiales y métodos: Se analizan en forma retrospectiva 6 casos espinales en niños, tratados entre 1992 y 2002. El seguimiento promedio fue de 7,8 años. Los datos clínicos más frecuentes fueron dolor, daño neurológico y deformidad o limitación funcional. Las lesiones se estadificaron según su comportamiento biológico (Enneking) y extensión anatómica (Weinstein-Boriani-Biagini). La tomografía computarizada y la resonancia magnética fueron los estudios de elección. El tratamiento consistió en curetaje y relleno con hueso autólogo. Se utilizó osteosíntesis cuando se consideró afectada la estabilidad espinal. Resultados: Se obtuvo la cicatrización de la lesión, sin constatar recidiva. Conclusiones: Los resultados favorables dependen esencialmente del diagnóstico y el tratamiento precoces

Quiste oseo aneurismatico subperiostico e intracortical: reporte de casos / Aneurismal bone cist subperiostial and intracortical

El quiste óseo aneurismático es un tumor óseo benigno, metafisario que se presenta en la segunda década de la vida; compromete los huesos alrededor de la rodilla, elementos posteriores de la columna y húmero proximal. El diagnóstico es clínico y radiológico. Se confirma mediante biopsia que debe descartar malignidad concomitante. Este tumor puede tener un comportamiento agresivo por lo que es importante darle un tratamiento minucioso con resección, curetaje e injerto óseo. La radioterapia tiene indicaciones muy precisas y no debe ser utilizada de rutina por el riesgo de malignización. Su pronóstico es bastante bueno