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Masaoka staging system of thymoma

The Masaoka staging system is commonly adopted for thymomas 1-3, and is the most important determinant of survival following surgical resection 4: stage I: intact thymic capsule stage II: capsular invasion into adjacent mediastinal fat or pleura stage III: macroscopic invasion into adjacent o...

Milan criteria in liver tranplantation

The Milan criteria are a generally accepted set of criteria used to assess suitability in patients for liver transplantation with cirrhosis and hepatocellular carcinoma. In order to be suitable for a liver transplantation, one needs to have 1: single tumour with diameter ≤5 cm, or up to 3 tumo...

Modified Noyes grading of the chondral injury

Chondromalacia can be divided into 4 grades by MRI, typically using fat saturated proton density sequences. The original Noyes grading system was based on arthroscopic findings. The modified Noyes system was published in 2009. Grade 0: normal cartilage Grade 1: increased T2 signal intensity of...

Modified Ringertz grading system for diffuse astrocytomas

The modified Ringertz grading system has historically been one of the more frequently used grading systems for diffuse astrocytomas, but has not essentially been replaced by the WHO grading system. Unlike the WHO grading system and St Anne-Mayo grading system (also known as the Dumas-Duport gra...

Moyamoya staging (Suzuki)

Suzuki and Takaku first described moyamoya and its staging in 1969. Stage I "narrowing of the carotid fork" * narrowed ICA bifurcation Stage II "initiation of the moyamoya" dilated ACA, MCA and narrowed ICA bifurcation with moyamoya change Stage III "intensifica...

Mueller Weiss syndrome: radiographic staging

Mueller Weiss syndrome refers to a spontaneous adult onset osteonecrosis of the tarsal navicular. This syndrome is multifactorial and related to chronic loading on a suboptimally ossified navicular bone which is susceptible to central osteonecrosis due to its centripetal blood supply. It is dist...

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