Akira  Hara,
Aseptic osteonecrosis of the humeral trochlea (Hegemann's disease)
Surgical Case Reports
2018
2613-5965
http://dx.doi.org/10.31487/j.SCR.2018.02.001
https://www.sciencerepository.org/aseptic-osteonecrosis-of-the-humeral-trochlea-hegemanns-disease-a-case-report_SCR-2-101 
Abstract: Aseptic necrosis of trochlea (Hegemann’s disease) is very rare. The diagnosis was done only by x-ray. At
early stage it is sometimes difficult by X-rays alone to distinguish aseptic necrosis from other conditions,
like as osteochondritis dissecanse or normal growth ossification center with fragmentation. There is one
case report of MRI finding, which was helpful for diagnosis of aseptic necrosis. We report the natural
history of aseptic necrosis of trochlea by radiology and confirmed the cure by MRI. We took MRI twice
once at the early stage and one after the recovery of aseptic necrosis. Through both radiological and MRI
findings, we precisely describe the natural evolution of aseptic necrosis of trochlea
Keywords: Aseptic osteonecrosis, humeral trochlea