RESUMO
SUMMARY: The os intermetatarseum is an accessory bone located in the foot, usually between the first 2 metatarsals and the cuneiform bone. It can be presented as free, articulated or in a fused fashion. It is a very unusual variation found in less than 13 % of the population. A 27-year-old patient presented to the emergency service due to an ankle lesion. Physical exam showed pain and limited range of motion while supporting partial load. Radiographic imaging showed a bony trace near the base of the first and second metatarsals, diagnosed as the os intermetatarseum. Formation of this supernumerary bone begins as a separate ossification center. Most cases are asymptomatic; however, compression of the deep peroneal nerve branches by the os intermetatarseum can lead to pain. Some authors suggest that the presence of this bone may cause hallux valgus. The intermetatarseum can lead to diagnostic confusion, mainly related to Lisfranc fracture. Its origin is still little understood.
El os intermetatarseum es un hueso accesorio ubicado en el pie, generalmente entre los 2 primeros metatarsianos y el hueso cuneiforme. Puede presentarse de forma libre, articulada o fusionada. Es una variación muy inusual que se encuentra en menos del 13 % de la población. Paciente de 27 años que acude a urgencias por lesión en tobillo. El examen físico mostró dolor y rango de movimiento limitado mientras soportaba una carga parcial. Las imágenes radiológicas mostraron un rastro óseo cerca de la base del primer y segundo metatarsianos, diagnosticado como os intermetatarseum. La formación de este hueso supernumerario comienza como un centro de osificación separado. La mayoría de los casos son asintomáticos; sin embargo, la compresión de las ramas profundas del nervio fibular en el espacio intermetatarsiano puede provocar dolor. Algunos autores sugieren que la presencia de este hueso puede provocar hallux valgus. El hueso intermetatarsiano puede llevar a confusión diagnóstica, principalmente relacionada con la fractura de Lisfranc. Su origen aún es poco comprendido.
Assuntos
Humanos , Masculino , Adulto , Ossos do Metatarso/anormalidades , Variação AnatômicaRESUMO
INTRODUCTION AND IMPORTANCE: Osteochondrosis is a disease described in several bones of the human body. It is a condition that can lead to pain and antalgic gait, although it can also be asymptomatic. The present work aims to report an incidental finding of osteochondrosis that afflicted the medial cuneiform bone. CASE PRESENTATION: A 6-year-old boy injured his leg in a road traffic accident and there was no evidence of a fracture line on the dorsal-plantar foot radiograph. However, the findings of marginal irregularity and sclerotic areas were considered to be indicative of osteochondrosis. CLINICAL DISCUSSION: Osteochondrosis is a self-limiting condition whose most accepted cause is stress injury. The main examination performed for diagnosis is radiography, in which morphological changes can be identified. The early ossification of the cuneiform bones may be related to the rare incidence of cuneiform osteochondrosis in children. Management of symptoms is the most indicated for this condition while surgical treatment is considered to be unnecessary and potentially harmful to the patient. CONCLUSION: Osteochondrosis of the cuneiforms is a rare entity that can be found accidentally during radiographic investigations. It is a disease that can spontaneously resolve. Anti-inflammatory drugs and activity reduction are commonly prescribed in symptomatic cases.
RESUMO
Os autores avaliaram 79 pacientes submetidos a artroplastia total do quadril utilizando próteses de Charnley, AML e Parhofer, entre 1978 e 1992, quanto ao desgaste linear do polietileno. A técnica nao digitalizada, utilizada pelos autores, permite erros em torno de 20 por cento, o que é compatível com a literatura. O ângulo de inclinaçaoacetabular parece ser prognóstico quanto ao desgaste do polietileno, assim como o off-set.