Análisis biomecánico de la continuación prepatelar del cuádriceps / Biomechanical assessment of the prepatellar quadriceps continuation

OBJETIVO Determinar la resistencia máxima a la tracción (RMT) de la continuación prepatelar del cuádriceps (CPC).MATERIALES Y MÉTODOS Se realizó un estudio en cadáveres humanos. Fueron incluidos diez especímenes, en los cuales se utilizaron los tercios proximal y medial de la cortical anterior de la patela para evaluar las propiedades mecánicas de la CPC. En cada espécimen, se estudió un área de sección transversal de 0,2 cm2 (A1) y 1 cm2 (A2). Se aplicó una carga gradual para determinar la RMT.RESULTADOS La mediana de la RMT en el A1 fue de 232,56 N (rango: 141,23 N a 295,33 N) y en el A2 fue de 335,30 N (rango: 216,45 N a 371,40 N). El incremento en la TMR fue significativo entre las 2 áreas (p = 0,006).CONCLUSIÓN El ignificado clínico de este estudio es que la CPC es un tejido fuerte que puede servir de anclaje seguro para reconstrucciones alrededor de la patela. Un área relativamente pequeña tolera al menos 140 N y, a medida que crece el área, también aumenta la RMT.

OBJETIVE To determine the ultimate tensile strength (UTS) of the prepatellar quadriceps continuation (PQC). MATERIALS AND METHODS A human cadaveric study was performed. Ten fresh-frozen specimens were used. The proximal and medial thirds of the anterior cortex of the patella were used to assess the mechanical properties of the PQC. In each specimen, transverse section areas measuring 0.2 cm2 (A1) and 1 cm2 (A2) were studied. A gradual load was applied to determine the UTS. RESULTS The median UTS of A1 was of 232.56 N (range: 141.23 N to 295.33 N), and that of A2 was of 335.30 N (range: 216.45 N to 371.40 N). The increment in UTS was significant between the 2 areas (p » 0.006). CONCLUSION The clinical significance of the present study lies in the fact that it shows that the PQC is a strong tissue that can be a safe anchor for reconstruction around the patella. A relatively small area supports at least 140 N, and, as the area grows, the UTS increases as well.

Proliferating Trichilemmal Tumor of the Knee Mimicking Prepatellar Bursitis on Ultrasonogram: A Case Report

Proliferating trichilemmal tumor is a rare benign tumor of skin appendage. It is usually solitary, more common in women after the fourth decade of life, and almost exclusively confined to the scalp and back of the neck. We report herein an unusual case of proliferating trchilemmal tumor which occurred on the knee.

Prepatellar Bursitis Caused by Aspergillosis : A Case Report

Prepatellar bursitis usually arise from repetitive stimulation, trauma, inflammatory disease, infection and so on. Although prepatellar bursitis is common, there has been no reported case that caused by Aspergillosis. A chronic prepatellar bursitis case was referred to us after management with conventional methods for a long time. We managed this case with surgical excision and biopsy revealed that the bursitis was caused by Aspergillosis. It is thought that when a prepatellar bursitis does not respond to treatments, fungal infection such as Aspergillosis should be suspected.

Two Cases of Acquired Fibrokeratoma Occuring on the Prepatellar Area and the Nail Bed / 대한피부과학회지

Aquired fibrokeratoma is a rare, benign tumor which occurs most frequently on the fingers. Because of the digital predilection, a term of digital fibrokeratoma has been frequently used. We present here two cases of acquired fibrokeratoma occurring on the prepatellar area and the proximal nail bed which are unusual sites of this lesion. A skin-colored, hyperkeratotic tumor with finger-like projection was found on the prepatellar area of a 29-year-old man and a round pedunculated nodule was found on the proximal nail bed of second finger of a 74-year-old woman. Histopathologic examination revealed typical features of acquired fibrokeratoma.