Table 1

 Demographic data of the patients aged <40 at diagnosis

Demographic dataNumberPercentage
Patients18
    Men950
    Women950
Age at diagnosis (years)
    1816
    2616
    3216
    35211
    36422
    37211
    38211
    39211
    40317
Normal alkaline phosphatases422
Raised alkaline phosphatases1478
Median (SD) Limits
Age at diagnosis (years)35.4 (5.5)18–40
Years of monitoring3.1 (2.5)0.5–9