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is a significant concern for physicians. Central" l: v4 f0 c6 |7 U! y3 C9 p
precocious puberty (CPP), which is mediated3 ~( I, J* c2 t: [' e' m. d
through the hypothalamic pituitary gonadal axis, has
( K3 a( k, D. X# Ja higher incidence of organic central nervous system
5 W8 F7 Q m4 q: W9 Vlesions in boys.1,2 Virilization in boys, as manifested1 q" L+ e4 W! A# I# z7 g
by enlargement of the penis, development of pubic5 G- q8 B0 l3 g* ~
hair, and facial acne without enlargement of testi-! X! ?; E6 ]. i. p3 m1 _1 `. b- j
cles, suggests peripheral or pseudopuberty.1-3 We# }5 t. e6 i+ a4 ~ o
report a 16-month-old boy who presented with the: g" y' s$ d6 }' S0 C
enlargement of the phallus and pubic hair develop-+ ?& B0 r9 p; {' j" s3 H0 \4 H5 w
ment without testicular enlargement, which was due
/ A* K0 ]+ Q0 z( H! `) p8 c4 q- wto the unintentional exposure to androgen gel used by
) `% q7 m1 s% p$ dthe father. The family initially concealed this infor-
; i' H, z. b3 I( P8 @0 o; umation, resulting in an extensive work-up for this
9 l! u( h: n, c! Pchild. Given the widespread and easy availability of
# ^9 w) T$ o: ~testosterone gel and cream, we believe this is proba- I# p8 D i P/ ?( [* s
bly more common than the rare case report in the
% i5 S# O* p* A$ {4 v9 \literature.45 \: u' O* R! v g1 ? X: x
Patient Report1 v4 ^' x" g P9 [# k
A 16-month-old white child was referred to the8 a2 z! u6 K! }0 X- w6 N/ K
endocrine clinic by his pediatrician with the concern
" D7 d$ I! `; F+ J8 u6 N5 |( Nof early sexual development. His mother noticed
% n* _# b. R9 a& @2 u' Wlight colored pubic hair development when he was
5 C& A7 M3 P5 JFrom the 1Division of Pediatric Endocrinology, 2University of. ~' q' X' @' C8 z! Z
South Alabama Medical Center, Mobile, Alabama.$ Q; E8 s4 n. j% G0 h2 B2 `
Address correspondence to: Samar K. Bhowmick, MD, FACE,( x, d- [# u' e |+ |4 [( k8 T2 n9 A
Professor of Pediatrics, University of South Alabama, College of7 x' w9 o0 F1 ]& H3 P. x- K+ c! @0 y
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
: ~/ ?# m7 X+ d& ke-mail: [email protected].( O! f- A) l" ], O$ N' M2 n
about 6 to 7 months old, which progressively became0 x0 I6 D- E$ t4 d: c6 p" J3 j; Y
darker. She was also concerned about the enlarge-1 n! l q2 [1 P. k9 c: ~
ment of his penis and frequent erections. The child" b3 a& E! v+ d3 s4 T
was the product of a full-term normal delivery, with4 p* n' m" ?3 i9 k. l5 f
a birth weight of 7 lb 14 oz, and birth length of
$ w ?; Y5 G9 [# m/ I; g20 inches. He was breast-fed throughout the first year) ?/ o6 }9 R, _* f2 C) `% A
of life and was still receiving breast milk along with2 ~7 ?$ r; ?* k4 J. Q
solid food. He had no hospitalizations or surgery,
% w' _; i! \! W2 ]3 Q: Oand his psychosocial and psychomotor development$ `! F: H' L6 ~7 ]" s
was age appropriate.0 ?* d; B$ u4 X5 o: S6 d& B
The family history was remarkable for the father,) d2 m) n5 C* F3 C2 Q
who was diagnosed with hypothyroidism at age 16,
6 H4 L1 X n3 H+ x Y" i* X7 }) v) Pwhich was treated with thyroxine. The father’s% o9 T' r# M3 V5 H$ p+ J# n
height was 6 feet, and he went through a somewhat
( p: J: P& i/ Q9 }2 Jearly puberty and had stopped growing by age 14.& p) N* r% X, Z2 w3 V
The father denied taking any other medication. The# O& H& z4 x# O
child’s mother was in good health. Her menarche
, d) I% `4 k5 B6 ~& N9 Fwas at 11 years of age, and her height was at 5 feet
: j$ S" ?" ~3 ]) n8 L3 ~5 inches. There was no other family history of pre-
! [! h6 `! E; w- } }cocious sexual development in the first-degree rela-
$ V& X5 H8 x7 s3 G8 Q' X \# otives. There were no siblings.! t3 S3 ?% Q. j3 ~4 p
Physical Examination1 s1 n( Z# v0 m1 v# P* v h* A
The physical examination revealed a very active,- \1 t+ x# i. R: r# L$ ^( U
playful, and healthy boy. The vital signs documented
# k' V6 V; X1 za blood pressure of 85/50 mm Hg, his length was
( O8 B2 Y, g) X6 Q0 [- E+ t" p8 _, ]90 cm (>97th percentile), and his weight was 14.4 kg
" @/ }, F; P p. K% w- B5 a(also >97th percentile). The observed yearly growth
. h0 F2 ]" R0 f5 T$ ovelocity was 30 cm (12 inches). The examination of
3 F; A1 m3 E, p# d! C( ^the neck revealed no thyroid enlargement.
( _6 B" c1 O. RThe genitourinary examination was remarkable for" S! R3 t, L+ i9 i0 u
enlargement of the penis, with a stretched length of$ v- M+ {8 S/ {1 N4 r$ X
8 cm and a width of 2 cm. The glans penis was very well
- K6 c- C0 j: z; Wdeveloped. The pubic hair was Tanner II, mostly around
! B5 j! U; f: K* R" B5403 z% X3 C5 I$ i0 ~; X& y) Q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 ~0 ^* \8 H; F) V" e; D9 ~5 N0 c w
the base of the phallus and was dark and curled. The
# b6 O2 Q; R% l9 q4 M. htesticular volume was prepubertal at 2 mL each.
1 Z1 o9 Q4 f6 ]6 c, D7 r9 O. uThe skin was moist and smooth and somewhat( ?+ {: ^8 `9 O" C1 v: x. N
oily. No axillary hair was noted. There were no
+ [( J4 R# p- J$ u! Sabnormal skin pigmentations or café-au-lait spots.
* t: g! g# j. s2 S) s5 ANeurologic evaluation showed deep tendon reflex 2+
$ K K( Q+ Z4 Q7 {' Lbilateral and symmetrical. There was no suggestion
i6 v* n7 o0 g E4 {. kof papilledema.7 Y, E5 Q$ y+ |9 f8 M
Laboratory Evaluation1 ^/ d7 |9 H# z) J1 l" E% l
The bone age was consistent with 28 months by3 F8 H% }: i: u, v9 N
using the standard of Greulich and Pyle at a chrono-
: W+ \1 e. v9 Y" O9 \/ D. Wlogic age of 16 months (advanced).5 Chromosomal
" g* M- g- a) xkaryotype was 46XY. The thyroid function test- e- ? V5 M" r7 s9 T% f
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
0 c, q4 a- O& f' d2 L9 l$ Clating hormone level was 1.3 µIU/mL (both normal).8 ]2 I( x+ ]0 o, Z/ [. W
The concentrations of serum electrolytes, blood2 j, A# I# `& ] L" C5 |
urea nitrogen, creatinine, and calcium all were
( S" z5 ?, v6 n$ l$ g$ {; q% H9 f1 Lwithin normal range for his age. The concentration
" C/ M/ n) e+ L$ w8 fof serum 17-hydroxyprogesterone was 16 ng/dL
/ i' H2 n" q. m/ l! U7 J- k(normal, 3 to 90 ng/dL), androstenedione was 205 Z/ U: K! M7 Y: G
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
' S! z; l1 x5 c4 |% uterone was 38 ng/dL (normal, 50 to 760 ng/dL),$ C5 }* K8 q4 }- A3 M
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
7 g2 u3 k" I* H ^- z- G, a1 M4 l1 M% N49ng/dL), 11-desoxycortisol (specific compound S)* s* G. ]) `( V9 I9 _2 ]
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-: p* V1 \1 X3 v* N' W0 S6 X0 H/ b
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total& _. Y/ I! C9 [5 {
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),$ ?/ {* }5 s: I3 U. \) h S
and β-human chorionic gonadotropin was less than3 M) c8 i/ n4 ?- r1 a& g
5 mIU/mL (normal <5 mIU/mL). Serum follicular) f2 Z6 h7 m6 d+ W; l: F
stimulating hormone and leuteinizing hormone& t- w1 Y' S* k6 f9 l
concentrations were less than 0.05 mIU/mL9 ~3 f Q$ R& t. H+ u5 ?6 H! b& O
(prepubertal).; ?, q# f3 }5 V9 l- `
The parents were notified about the laboratory
) D! N2 {) J7 A% a8 F( C+ ]results and were informed that all of the tests were' E7 Z8 E Z$ T5 b9 m2 e
normal except the testosterone level was high. The' F# D4 V' ]7 } N, o' `: W
follow-up visit was arranged within a few weeks to3 E) S6 _# X+ ?3 }* i+ Z& p2 ?
obtain testicular and abdominal sonograms; how-
" S/ H4 k, c4 U( dever, the family did not return for 4 months.' D0 }& h9 C6 [: C1 R
Physical examination at this time revealed that the8 x/ {# f! u9 ?! b, k& {- S
child had grown 2.5 cm in 4 months and had gained! E1 g5 \" y) |9 j) e
2 kg of weight. Physical examination remained3 Q2 P! P$ d3 i% m
unchanged. Surprisingly, the pubic hair almost com-; m) r# b# i0 k J
pletely disappeared except for a few vellous hairs at
7 Q7 B& z+ f. @7 H/ k, ^the base of the phallus. Testicular volume was still 2! T7 G+ j& _: {. m+ [
mL, and the size of the penis remained unchanged.
- j" c, V- S% R% F, S6 TThe mother also said that the boy was no longer hav-# ?- n- C9 T% b
ing frequent erections.
7 I4 B" j$ a8 Q2 R- X. {Both parents were again questioned about use of
$ Z) |- l) p2 H. s: dany ointment/creams that they may have applied to% }" i4 z! D- }+ c5 Z6 d. m
the child’s skin. This time the father admitted the+ l' Z) Q- Z7 ?6 o3 _1 _
Topical Testosterone Exposure / Bhowmick et al 541
9 t$ z- ~6 N. Y8 t$ r$ ]use of testosterone gel twice daily that he was apply-3 c4 w7 R- a( `" d
ing over his own shoulders, chest, and back area for) W3 J0 |6 ^9 g9 {6 t* D- f
a year. The father also revealed he was embarrassed n% S1 Z, Z# Q s, [$ w$ h* X! _
to disclose that he was using a testosterone gel pre-1 ]2 f- o& D. `0 W1 X* S- _& `" x4 P9 \
scribed by his family physician for decreased libido8 M* s5 G; Q, M8 z t6 m
secondary to depression.$ C0 s, _5 W( Y
The child slept in the same bed with parents.
' x: ^( R: X! }3 Q7 tThe father would hug the baby and hold him on his5 s1 K0 D: k( m W: R# n2 w
chest for a considerable period of time, causing sig-
N4 t0 I+ o! k h& Snificant bare skin contact between baby and father.6 R s# h. V5 I k" S
The father also admitted that after the phone call,' f- R3 F3 c$ c* f
when he learned the testosterone level in the baby
3 b5 B" Q! W- rwas high, he then read the product information4 E) J1 ^9 q8 X
packet and concluded that it was most likely the rea-
* C8 N, @; i: b7 bson for the child’s virilization. At that time, they
# g3 ~1 Y0 n- Edecided to put the baby in a separate bed, and the
9 L) M; @% \4 [) B+ i5 l8 r+ \2 ofather was not hugging him with bare skin and had
' f4 c, v- r# X0 F) m' {4 G) J& Wbeen using protective clothing. A repeat testosterone3 _% K" d% E! i5 p
test was ordered, but the family did not go to the
. n: _+ H* @4 `7 Tlaboratory to obtain the test.
0 J U2 V; A7 ZDiscussion7 E% t) ~' k3 S( D, U: B/ u: Z
Precocious puberty in boys is defined as secondary. a* p& j! T2 E/ d( g4 m
sexual development before 9 years of age.1,4" I2 s5 {4 r! v1 K& }( M+ G7 P. u
Precocious puberty is termed as central (true) when5 t* g( p) n* E5 [
it is caused by the premature activation of hypo-
- g0 u* ~2 _8 _thalamic pituitary gonadal axis. CPP is more com-
$ \4 W% k8 n4 \: F2 a( k/ x6 @mon in girls than in boys.1,3 Most boys with CPP: S9 `8 H/ n- y
may have a central nervous system lesion that is7 i# L) q( ~/ e! y& W
responsible for the early activation of the hypothal-
* ^2 h' |; V! R+ f4 Famic pituitary gonadal axis.1-3 Thus, greater empha-" w8 L t/ S) e" @: Q' f
sis has been given to neuroradiologic imaging in- D: K7 M" M; Z& b; V
boys with precocious puberty. In addition to viril-6 O& e8 C6 |. M4 X( p2 c
ization, the clinical hallmark of CPP is the symmet-
; z) E, Y2 ^1 }4 ?4 U, n' Arical testicular growth secondary to stimulation by/ A% T& T) p0 E* ]" _
gonadotropins.1,3$ O; Y, v8 V4 j3 L& n' l
Gonadotropin-independent peripheral preco-; K. A' r/ T/ q) Y" V
cious puberty in boys also results from inappropriate
1 i' [' G9 G, d5 a! Y' j+ ?# Aandrogenic stimulation from either endogenous or( x w3 M" @/ p% O' j: ?
exogenous sources, nonpituitary gonadotropin stim-
4 Z4 a. e1 o8 ?ulation, and rare activating mutations.3 Virilizing
% x: f! F& v, ^congenital adrenal hyperplasia producing excessive
; F3 V+ ]4 E, b! Z( F& q5 N# Kadrenal androgens is a common cause of precocious( F! p# W$ Y+ } v
puberty in boys.3,4
2 ` [2 r) @$ U3 a2 M" J/ ?The most common form of congenital adrenal; s: M3 o, L! `8 _1 Y# d
hyperplasia is the 21-hydroxylase enzyme deficiency.
8 A; u' A% C5 h; Z3 b( F( u: S7 pThe 11-β hydroxylase deficiency may also result in
- _& Y. t: `9 R1 ~4 V8 ?- r+ @excessive adrenal androgen production, and rarely,& s7 D# d+ p& t$ J" M4 J
an adrenal tumor may also cause adrenal androgen( K$ R- H% y6 x" l
excess.1,3
# j' E! o7 F7 ~" E' ]. Eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 P" b' Z9 @) n4 t
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
- s' i& S+ F% a7 V; BA unique entity of male-limited gonadotropin-
* H8 W3 u! X1 N8 ^# dindependent precocious puberty, which is also known- Z* O( m. J6 h7 a4 z1 i; [9 r. \
as testotoxicosis, may cause precocious puberty at a
* V/ ]9 Y! h7 A6 n# j" N7 j. ?very young age. The physical findings in these boys" ~5 @4 a1 x7 p" [* q/ g3 p
with this disorder are full pubertal development,
1 t9 h; r7 d9 l* g: aincluding bilateral testicular growth, similar to boys
+ K0 N" m( t0 T: y$ f, ewith CPP. The gonadotropin levels in this disorder1 ^5 N0 j8 h6 S% B9 J
are suppressed to prepubertal levels and do not show# S8 y0 X K' F0 J/ v1 w
pubertal response of gonadotropin after gonadotropin-8 T4 B5 S- S7 l% }# e9 D
releasing hormone stimulation. This is a sex-linked' h7 ]2 m. C% I
autosomal dominant disorder that affects only' l: u8 R) z- J" m$ ^6 t2 u3 M7 a
males; therefore, other male members of the family) M: u/ T( u- u9 p) k; S' Z
may have similar precocious puberty.3
* @9 f P! P9 Q8 x# kIn our patient, physical examination was incon-* B* F. y4 C* j' q/ I6 B
sistent with true precocious puberty since his testi-- y" o6 F) t/ i. _1 ?
cles were prepubertal in size. However, testotoxicosis
: v' i2 g' m& @/ i" D7 Xwas in the differential diagnosis because his father* R0 j' P2 @: ^6 N: B- |
started puberty somewhat early, and occasionally,5 T" L& w) O( Q. E, b+ b/ @3 X/ j
testicular enlargement is not that evident in the6 W2 r* m$ J" ]4 q0 d( G% m/ d
beginning of this process.1 In the absence of a neg-9 I% |, s% q& N8 g2 [- J' p) I
ative initial history of androgen exposure, our. P7 ]2 a, R: q, D
biggest concern was virilizing adrenal hyperplasia,
: S: ?9 B9 Y/ o- n4 K1 geither 21-hydroxylase deficiency or 11-β hydroxylase- {( B* j9 C" }2 a
deficiency. Those diagnoses were excluded by find-' @% C1 c: a2 {3 T
ing the normal level of adrenal steroids.: H+ z+ g2 K% u r6 W
The diagnosis of exogenous androgens was strongly
) K' ~9 `6 ~* t6 v$ l* n/ i% lsuspected in a follow-up visit after 4 months because
* n( {4 C' k& o+ qthe physical examination revealed the complete disap-
0 L' H& J3 }3 U) G3 w1 F! Q! fpearance of pubic hair, normal growth velocity, and2 I5 @; F# y f( R" o2 @, v
decreased erections. The father admitted using a testos-6 {6 l8 z" ^: H P
terone gel, which he concealed at first visit. He was' K4 ^1 W3 K2 o D: s& Y( N1 Q2 P
using it rather frequently, twice a day. The Physicians’6 S' }2 z& Y. y: V# a
Desk Reference, or package insert of this product, gel or- b6 D* L* p: m) }; C
cream, cautions about dermal testosterone transfer to$ S! `8 h' ?% `+ A( f/ w& d f7 e6 n
unprotected females through direct skin exposure.
. U2 A9 I" V: r! e5 M2 q0 ~6 }Serum testosterone level was found to be 2 times the% V5 Y7 A6 C% y
baseline value in those females who were exposed to
9 G& ~( @4 |% aeven 15 minutes of direct skin contact with their male
! F& s2 J* J/ Y3 Y* Y' mpartners.6 However, when a shirt covered the applica-' u: T" J$ @. W# {) _) Z: Y
tion site, this testosterone transfer was prevented.+ \. r( R) v5 E; T$ r$ \- L
Our patient’s testosterone level was 60 ng/mL,* H- k' O, X% [* \6 k$ I/ h
which was clearly high. Some studies suggest that) n( K! q* v- P: c& q0 d
dermal conversion of testosterone to dihydrotestos-
. m# g" f- i3 o3 J0 @( B! @4 eterone, which is a more potent metabolite, is more
) |" G1 ^1 V0 }5 ~1 ?; E, factive in young children exposed to testosterone
& e* \- S( l% W3 [4 F( b3 d3 }exogenously7; however, we did not measure a dihy-
3 @/ h$ R- J$ F; t3 l+ sdrotestosterone level in our patient. In addition to0 \+ F9 S7 L9 v" W+ m
virilization, exposure to exogenous testosterone in
, ^+ C6 Y# v0 x, }& X4 [! \6 H4 ichildren results in an increase in growth velocity and
& I4 {, G. d8 badvanced bone age, as seen in our patient.+ Q; @9 a% ~) R, t7 n& ?
The long-term effect of androgen exposure during
( j. ~4 Q* R5 A% searly childhood on pubertal development and final
/ v& f' b, {8 |, b) g. z$ badult height are not fully known and always remain# b& M' j5 U2 v4 }, ^" X( k# M
a concern. Children treated with short-term testos-( x8 b5 f0 r+ G. F+ ]! a& u- X+ d- t* ^
terone injection or topical androgen may exhibit some
. N* X- F# z3 ^acceleration of the skeletal maturation; however, after8 d. T* h+ h2 w! g8 G
cessation of treatment, the rate of bone maturation
& U- i/ V$ H! Q# `7 \; P% @: ^decelerates and gradually returns to normal.8,9
. Z( c: l. E, O$ F+ b6 TThere are conflicting reports and controversy
7 ~ W8 q5 N5 oover the effect of early androgen exposure on adult5 Z. V" a7 w+ s5 j; [9 E- R2 S* g
penile length.10,11 Some reports suggest subnormal
- `2 M5 q5 u& q" Oadult penile length, apparently because of downreg-
7 A2 C$ p5 w( d! I, v7 d+ h) U% Eulation of androgen receptor number.10,12 However,/ y8 n/ r- G- o
Sutherland et al13 did not find a correlation between
% L& y- o; ^9 J% |$ R6 H% Lchildhood testosterone exposure and reduced adult6 a+ {: c" r- j6 r5 b5 {/ _3 V, W# X
penile length in clinical studies.0 ]" u: s7 X, }5 [7 J
Nonetheless, we do not believe our patient is
, T/ e9 @8 ?$ E( |going to experience any of the untoward effects from4 ?) i1 Z# v( A! x$ Z' a) l
testosterone exposure as mentioned earlier because
2 J* g; X* X1 }6 z/ ]) K: R) @the exposure was not for a prolonged period of time.* T# x1 H1 r0 p/ ]
Although the bone age was advanced at the time of% L0 k& D, v) q* ^
diagnosis, the child had a normal growth velocity at# U) D* q* N( ~9 U
the follow-up visit. It is hoped that his final adult
, L2 J- Z E6 J, f' theight will not be affected.: j8 U( k1 i3 H6 R) S- u5 ?; p5 Y: N
Although rarely reported, the widespread avail-1 O% t! {) o) N1 O5 \! D6 O8 @+ [& @
ability of androgen products in our society may
0 b+ F4 g% s6 A) g" p& qindeed cause more virilization in male or female
0 j! n- H/ [: [" l+ E2 Q% [children than one would realize. Exposure to andro-8 f5 w9 Y; [3 ~* I- V4 n3 P
gen products must be considered and specific ques-% Y0 t& Q# G1 x
tioning about the use of a testosterone product or* F. A' M3 l6 G0 |7 f
gel should be asked of the family members during
: @5 B( L8 ]/ K, P1 X) O; o7 pthe evaluation of any children who present with vir-1 ^+ y! m/ K8 |
ilization or peripheral precocious puberty. The diag-
n; d M: K9 H' A8 H; ?; E8 [nosis can be established by just a few tests and by4 r! l( J' W* a: s7 B5 L: w3 }1 G
appropriate history. The inability to obtain such a
& A& }: O9 B( o c0 Chistory, or failure to ask the specific questions, may
/ L, u+ w$ `( I$ gresult in extensive, unnecessary, and expensive
) i6 b Z3 S+ Z J8 ~: \investigation. The primary care physician should be
: F9 R9 L( S. Q0 jaware of this fact, because most of these children8 i1 n0 t ^" o+ e$ j% b
may initially present in their practice. The Physicians’
! K% ]+ R" T' M0 PDesk Reference and package insert should also put a
# z9 C) U5 ~1 i; A8 w8 D+ x! Dwarning about the virilizing effect on a male or$ j) O- t5 @( @' c6 A
female child who might come in contact with some- z! O- d! _8 L. n
one using any of these products.( s* G q+ N' L9 u
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1. Styne DM. The testes: disorder of sexual differentiation
3 s2 W2 Z( i+ V9 o2 zand puberty in the male. In: Sperling MA, ed. Pediatric
) L* ~- F/ I, _, f& k2 }9 n7 PEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;( p( P4 o7 ?8 c
2002: 565-628.& U4 R8 t* P9 n+ E# Y& O. r0 M
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious8 {6 H9 V4 ^ o: O$ R
puberty in children with tumours of the suprasellar pineal8 M6 G) G; O. B9 O0 S, K
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
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areas: organic central precocious puberty. Acta Paediatr.5 W" J" [1 B& [4 r
2001;90:751-756.
# U& `4 a2 ~! l: M z% f3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.+ R+ O8 D- h3 S, f% L1 d# U# ?
Pediatric Endocrinology. 4th ed. New York, NY: Marcel- }: I# g8 C6 ?/ t* w5 }
Dekker Inc; 2003:211-238.
; K& h6 w4 Q0 f5 R. h0 G. k4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual w) `/ R+ c6 S3 a
development in a two-year-old boy induced by topical
7 V% z+ Z3 c1 v+ {9 E; Dexposure to testosterone. Pediatrics. 1999;104:e23.- R# W1 U2 }3 v
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of' D7 p* M, j5 X- c; u
Skeletal Development of the Hand and Wrist. 2nd ed.1 o! B* J; x) t! ~. T
Stanford, CA: Stanford University Press; 1959.
: v: G) e8 J q* a/ e, K6. Physicians’ Desk Reference. Androgel 1% testosterone,0 M. i1 D4 j7 V8 g- {- K2 ~7 f
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