Table 1.

Patient and imaging characteristics

Patients and tumor demographics
Gender
Male	9
Female	11
Race
Caucasian	19
African-American	1
Mean age at initial imaging (years ± SD, range)	47.1 ± 16.8 (12–81)
Mean size of initial lesions (cm ± SD (range))	3.2 ± 1.3 (1.1–5.3)
Mean size at ACC diagnosis (cm ± SD (range))	6.9 ± 3.1 (3.1–16)
Lesion appearance at initial imaging
Heterogeneous	12
Homogeneous	8
Mean lead time to ACC diagnosis (months ± SD (range))	44.1 ± 39.5 (6.0–131.0)
<12 months (N (%))	5 (25)
<24 months (N (%))	10 (50)
Mean growth rate (cm/year ± SD (range))	1.9 ± 1.7 (0.2–6.0)
<1 cm/year (N (%))	7 (35)
Lesions with a latent period of stability (N (%))	6 (30)
Latent period range (years)	0.6–8
Hormone secretion at time of ACC diagnosis (N (%))	8 (40)

Initial and final sizes, hormone work-up