Table 1 Clinical and imaging characteristics of lipoma, liposarcoma and hibernoma.
From: Hibernoma: a rare case of adipocytic tumor in head and neck.
Clinical features | Lipoma | Liposarcoma | Hibernoma | |
Size | <5 cm (80% cases) | >5 cm | >5 cm | |
Growth | Slow | Slow/moderate/high | Slow/moderate/high | |
Age | 25-65y | >50y | 30-50y | |
Clinic | Asymptomatic +++ | Asymptomatic ++ | Asymptomatic ++ | |
Sexe ratio | M = F | M > F | F > M | |
MR Imaging | Well-homogeneous | Variably homogeneous | Variably homogeneous | |
Characteristics | Well-circumscribed | Well-circumscribed | Well-circumscribed | |
Less vascularized | Variably vascularized (C+) | Variably vascularized (C+) | ||
No nodular lesion | Possible nodular lesion | Possible nodular lesion | ||
T1: Hyper (as fat) | T1: Hyper (less than fat/lipoma) | T1: Hyper (less than fat/lipoma) | ||
T2: Hyper (as fat) | T2: Hyper | T2: Hyper | ||
STIR/T2 Fat Sat: removing signal | STIR/T2 Fat Sat: no removing signal | STIR/T2 Fat Sat: no removing signal | ||
Septa:<2 mm (C+) | Septa:>2 mm (C+) | Septa:>2 mm (C+) |