Where<unk>  and thrombophlebitis present as differential diagnoses, DVT is excluded by the absence of a deep vein thrombosis, and the presence of a popliteal cyst is suggestive of<unk> . The differentiation requires the use of radiological or arthroscopic imaging modalities. In this condition, imaging modalities often indicated include the use of Doppler and non-Doppler ultrasound, arthrography, venography magnetic resonance imaging (MRI) and computerised axial tomography (CAT scan). Ultrasound modalities in general are useful for the detection of a ruptured or dissecting popliteal cysts, while Doppler ultrasound has the additional benefit of detecting venous stenosis such as that caused by deep vein thrombosis. Arthrography and venography using imaging dyes allow for the detection of popliteal cysts and the exclusion of thrombotic lesions but are invasive procedures. Magnetic resonance imaging and computerised axial tomography scans allow for the detection of a ruptured or dissected popliteal cyst and, if in the same plane as the scan, the detection of a deep vein thrombosis.
Pseudothrombophlebitis
Superficial thrombophlebitis
Varicose veins
Septic thrombophlebitis
Thrombophlebitis
Superficial vein thrombosis
Lymphangitis
Trombiculosis