13 y/o. Rule out 5th MTT base mass.

Iselin disease - apophysitis of the base of the 5th metatarsal.

Edema in STIR and FSPD. Low signal in T1.

Recreational Cyclist. Lateral knee pain.

Iliotibial band syndrome: High signal in STIR due to Inflammation of the fat adjacent to the iliotibial band.

Deep Sulcus sign of the Knee.
ACL rupture sign in XRays.
Caused by Pivot Shift trauma mechanism

Deep venous thrombosis (DVT) of medial astrocnemius vein. Axial PDFS.

Distended gastrocnemius vein (arrow) with increased signal in the medial head of the gastrocnemius muscle

So called Proximal ITB syndrome. More of a enthesopathy, with thickening and microtearring of the origin of the ITB. Prominent edema and inflamatory response around it. Looks painful.

Medial Gastrocnemius origin avulsion fracture.
MCL and MPFL Avulsion fracture
Medial capsular defect

Segond fx.

ALL avulsion fx. When present, anterolateral ligament is clearly depicted as the hipointense lineal structure attaching to the bone fragment.
Of course, ACL is torn.
#msk #knee

PLC Injury

Tear of LCL and Popliteal tendon. Ill defined arcuate lig.
Partial Thickness tear ACL.

Something is missing ...
Greater tuberosity avulsion fracture.

Concave well defined defect superolateral margin of humeral head.

T1 imaging reveals bone fragment attached to Supra and infra tendons, with displacement and retraction.

#shoulder #msk #msk rad

Walch B2 glenoid dysplasia and glenohumerar OA

Graphic from DOI10.1007/s00590-012-1119-4

Rings, arcs and pop corns. Characteristic of chondroid lesions.

Chondrosarcoma of the left Shoulder Girdle

Peripheral nerve sheath tumor

High signal fusiform mass with tapered ends, with posterior tibialis nerve leading into and out of the mass

Lisfranc Injury
- Weightbearing AP XR: asymmetric widening of intermetatarsal space
- CT: Fracture of lateral aspect of C1 caused by avulsion of Lisfranc ligament (C1-M1)
- MR: Lisfranc ligament appears preserved and cortical C1 avulsion is inferred.

Third intermetatarsal perineural fibrosis - Morton neuroma

T1: Low signal ovoid mass in the intermetatarsal space
DP and FFE: intermediate signal

Severe pes anserinus bursitis

- Bursal fluid
- Thickened bursal wall with avid enhancement
- Reactive bone marrow edema anteromedial tibia

Intraosseous lipoma
- Well defined High T1 and low STIR humeral neck lesión

Low Flow Vascular anomaly

Phleboliths clearly shown in x ray. Axial PD showing high signal mass in vastus intermedius.
T2 GRE showing phleboliths as low signal dots inside the posterior aspect of the mass.

Replacement of Achiles tendon fibers by mature fat
- Intratendinous Lipoma?