Linear Growth and Final Height after Treatment for Cushings Disease in Childhood
Marie-Christine Lebrethon1,
Ashley B. Grossman,
Farhad Afshar,
P. Nicholas Plowman,
G. Michael Besser and
Martin O. Savage
Pediatric Endocrinology Section (M.C.L., M.O.S.), Departments of
Endocrinology (A.B.G., G.M.B.), Neurosurgery (F.A.), and Radiotherapy
(P.N.P.), St. Bartholomews Hospital, London, United Kingdom
EC1A 7BE
Address all correspondence and requests for reprints to: Prof. Martin O. Savage, Pediatric Endocrinology Section, Department of Endocrinology, St. Bartholomews Hospital, West Smithfield, London, United Kingdom EC1A 7BE. E-mail: m.o.savage{at}mds.qmw.ac.uk
Cushings disease is associated with growth failure inchildhood and
adolescence. Growth and final height were analyzedin 10 patients who
were cured or in remission after treatmentof Cushings disease. Seven
males and 3 females, aged6.817.6 yr (bone age, 3.3- 15.4 yr), had
transsphenoidalsurgery, which was combined with pituitary irradiation
(4500cGy in 25 fractions) in 5 patients. At presentation, 5 patients
wereprepubertal (males), and 5 were pubertal (2 males and 3 females).
Themean height SD score was -2.15 ± 1.26
(range, -0.21 to-4.32) compared with mean target height
SD score of -0.43 ±0.58. Height velocity in 6
patients was subnormal (0.93.8cm/yr). After treatment, short-term
height velocity, over amean interval of 0.57 yr, in 8 patients not
receiving humanGH (hGH) therapy, was variable (range, 0.87.6 cm/yr).
GHstimulation tests (insulin tolerance test/glucagon) in 9 subjects
showedpeak GH levels of 0.520.9 mU/L. Eight were treated withhGH
(14 IU/m2·wk), combined in 2 girls and 1 boy witha GnRH
analog. After 1 yr of hGH, the mean height SD score had
increasedfrom -2.45 ± 1.0 at initiation of hGH to -2.07
±1.2 (P = 0.01). GH therapy was continued until
final heightor latest assessment. The mean final height SD
score (n = 6)was -1.24 ± 1.38, and at the latest
assessment the meanheight SD score (n = 4) was
-1.52 ± 1.33. Combining these2 groups, the mean height
SD score was -1.36 ± 1.29.The difference between
final or latest height SD score and targetheight
SD score was 0.93 ± 1.13, i.e. less
(P = 0.005)than the difference between height and
target height SD scoreof 1.72 ± 1.26 at
presentation. In conclusion, catch-upand favorable long-term growth
was seen after treatment forCushings disease. Posttreatment GH
deficiency was frequent,and early hGH replacement may have contributed
to the encouragingoutcome.
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