Table 3: MRI signs on epidermal cysts according to size category.

Case Size
(cm)
Keratinous
Debris
Intracyst Foci*
<sign> [n (%)]
Peripheral Lining*
<sign> [n (%)]
Large (4) - 13 13
- Positive 13 (100) 12 (92)
- Negative 0 (0) 1 (8)
Middle (2 to <4) - 12 12
- Positive 2 (17) 9 (75)
- Negative 10 (83) 3 (25)
Small (<2) - 8 8
- Positive 0 (0) 4 (50)
- Negative 8 (100) 4 (50)
Total - 33 33
(3.5) Positive 15 (45) 25 (76%)
(range, 0.6 to 12) Negative 18 (55) 8 (24)

Intracyst foci sign of intracyst debris, Peripheral lining sign of a peripheral lining

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