Bone union status of all osteotomy sites one year after curved periacetabular osteotomy based on computed tomography.

Background: Curved periacetabular osteotomy (CPO) is a joint-preservation surgery to treat acetabular dysplasia. It is performed via an anterior approach with the osteotomy of the anterosuperior iliac spine (ASIS). One of the complications associated with CPO includes non-union of the osteotomy sites.

Magnetic Resonance Imaging Assessment of Abductor Muscles Shortly After Curved Periacetabular Osteotomy.

Background: Curved periacetabular osteotomy (CPO) is performed via an anterior approach without detachment of the hip abductor muscles. This study aimed to evaluate the abductor muscle status shortly after CPO on magnetic resonance imaging (MRI).

Methods: We prospectively evaluated 38 hips in 38 patients 1 week and 3 months after CPO between October 2017 and July 2019.

Diffuse-type tenosynovial giant cell tumor with t(1;17)(p13;p13) and trisomy 5.

Diffuse-type tenosynovial giant cell tumor (TSGCT) is a locally aggressive neoplasm that primarily affects the synovium and tendon sheath in young adults. Rearrangement of chromosome band 1p13 is now considered a characteristic genetic feature of TSGCT, with the most frequent chromosomal alteration t(1;2)(p13;q37). Here, we describe a unique cytogenetic finding of diffuse-type TSGCT arising in the ankle of an 18-year-old woman.

Atypical lipomatous tumor with structural rearrangements involving chromosomes 3 and 8.

Atypical lipomatous tumor (ALT) is an intermediate (locally aggressive) mesenchymal neoplasm with the potential to dedifferentiate to higher grades over time. It is cytogenetically characterized by the presence of one or more supernumerary ring and giant marker chromosomes. These abnormal chromosomes invariably contain amplified sequences derived from the 12q14-15 region.