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is a significant concern for physicians. Central
( T! B* Q( W5 ^6 c2 Zprecocious puberty (CPP), which is mediated
9 Q# a+ ?7 {; m% U) a ~* tthrough the hypothalamic pituitary gonadal axis, has: d/ K7 u/ ]" L0 A3 ^
a higher incidence of organic central nervous system" G3 q0 r# G1 g5 G# v' J+ y3 a
lesions in boys.1,2 Virilization in boys, as manifested
5 E7 }9 _; |& X2 X) s P+ [! } y% jby enlargement of the penis, development of pubic
/ c; t: a! y- a* ^, shair, and facial acne without enlargement of testi-7 Q. c/ H6 Y5 k% t* Z* R
cles, suggests peripheral or pseudopuberty.1-3 We( T* s ]4 S9 q ?% F V! U1 m T& k
report a 16-month-old boy who presented with the/ s' Y: H& G0 f y/ V
enlargement of the phallus and pubic hair develop-
3 Z3 i* i# k8 }* Ument without testicular enlargement, which was due
7 Q* G: R& F) b: ]4 Pto the unintentional exposure to androgen gel used by
' v0 `0 e/ i1 O5 u* zthe father. The family initially concealed this infor-, v3 G0 K+ F$ a) F
mation, resulting in an extensive work-up for this1 k( L8 H' K' Y) \% g5 j
child. Given the widespread and easy availability of5 ]. u8 I3 R0 B8 g9 W( ]
testosterone gel and cream, we believe this is proba- q' Y: v2 {: N" f" W! B
bly more common than the rare case report in the
: m+ {* D- [5 }literature.4
) ?& D$ _1 d1 E% ^5 P! ]. zPatient Report
8 k* W N' S, q% G# @2 GA 16-month-old white child was referred to the
2 K' d- A5 M7 i6 S$ U+ h: zendocrine clinic by his pediatrician with the concern9 a6 N- ^/ j. e0 ^
of early sexual development. His mother noticed) ~5 v; w- c& i" D
light colored pubic hair development when he was
# Y9 s1 }" `0 \/ @* Z, x/ PFrom the 1Division of Pediatric Endocrinology, 2University of
' O; v' C! h* a* pSouth Alabama Medical Center, Mobile, Alabama.
4 @# Q$ j% Y% T& A7 nAddress correspondence to: Samar K. Bhowmick, MD, FACE,, u8 u& O2 k- P& c5 O: `7 _- b# y4 {
Professor of Pediatrics, University of South Alabama, College of
* X6 J( u5 B3 w8 KMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;/ c) u; i, y& B2 z( \
e-mail: [email protected].2 w2 {( q, W( I3 b/ B
about 6 to 7 months old, which progressively became' L0 Q" P* _2 r; ?
darker. She was also concerned about the enlarge-
( p: R9 d1 Z4 L% A" [ment of his penis and frequent erections. The child
( F' ^+ v$ j% Awas the product of a full-term normal delivery, with
" o" O: v& r/ Ja birth weight of 7 lb 14 oz, and birth length of! Q% r4 w* u8 K) S" C* o
20 inches. He was breast-fed throughout the first year
, f# V4 O: a! Y$ Xof life and was still receiving breast milk along with
$ W7 s/ X4 S7 ]) _( T6 xsolid food. He had no hospitalizations or surgery,
: \; R* C P4 `and his psychosocial and psychomotor development7 _8 S. S% o3 m+ E- u/ u5 X; F
was age appropriate.
2 X' g0 _1 F6 s9 uThe family history was remarkable for the father,
$ V: ^% R) `' [( G8 ?& ]who was diagnosed with hypothyroidism at age 16,' N. H; x) W/ o9 n0 Z1 D; |
which was treated with thyroxine. The father’s8 Q* _% T' J9 D, Y4 c/ X
height was 6 feet, and he went through a somewhat1 l5 ?. L! q4 G7 j
early puberty and had stopped growing by age 14.
5 Y! b/ x6 r* R5 Q5 a J4 {The father denied taking any other medication. The; V" i' ]$ \$ R) k
child’s mother was in good health. Her menarche
( _2 C% j6 l) u$ d% i! twas at 11 years of age, and her height was at 5 feet5 ~6 {5 ]$ z" |& m& G* J
5 inches. There was no other family history of pre-4 E- z3 K4 e! ~( b' z/ G& A
cocious sexual development in the first-degree rela-3 e4 A* X: o" R+ o' w( z4 @; y# [
tives. There were no siblings.
6 h: u% I2 t* aPhysical Examination4 t3 o* o' U: g& b6 h5 D
The physical examination revealed a very active,' ~9 l6 C- ?1 H! q7 G! j
playful, and healthy boy. The vital signs documented, I2 D$ t/ @- X* \) T" u- F
a blood pressure of 85/50 mm Hg, his length was4 n4 }6 B- D9 d3 \
90 cm (>97th percentile), and his weight was 14.4 kg
! P, V) \- X% h% W, w(also >97th percentile). The observed yearly growth
- S Y9 W# A: \. w! Gvelocity was 30 cm (12 inches). The examination of" {6 Z6 F/ R2 U% A# K3 {
the neck revealed no thyroid enlargement.
3 q6 @$ ?2 |8 t$ q& t5 X5 j1 YThe genitourinary examination was remarkable for' U$ @" c+ Y6 m @
enlargement of the penis, with a stretched length of: \1 B& r0 I" f7 |. w
8 cm and a width of 2 cm. The glans penis was very well8 ]+ ?$ c) b9 b0 B/ t7 h: Z
developed. The pubic hair was Tanner II, mostly around
4 f2 `3 R; \& i$ `540* ~! N+ y) S- b
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' V6 d# i- v/ Q( X, p; G
the base of the phallus and was dark and curled. The: |# k9 W7 c9 U! S) g. U
testicular volume was prepubertal at 2 mL each.6 `2 o4 F8 L0 |
The skin was moist and smooth and somewhat
* z# o2 n) P7 N, f5 F5 _+ Roily. No axillary hair was noted. There were no1 e7 g* C- Z8 L9 X; A2 J
abnormal skin pigmentations or café-au-lait spots.
2 a/ I$ I% _# \1 j" ?Neurologic evaluation showed deep tendon reflex 2+! y; F( k; p: I8 } J
bilateral and symmetrical. There was no suggestion) ^6 l9 {+ w. o1 a( h# y' _+ e
of papilledema.
- l6 }' S$ ~0 v! D/ i/ `Laboratory Evaluation
# `: p! d+ j6 k& J8 C% tThe bone age was consistent with 28 months by% L9 L. J Y" ?, A6 j: m0 m* p
using the standard of Greulich and Pyle at a chrono-
7 V/ S. x+ d1 \+ t5 Ilogic age of 16 months (advanced).5 Chromosomal; J/ u9 c1 {9 H% Q- @
karyotype was 46XY. The thyroid function test- X4 w k: k% i! R" ^; }6 ?/ ~
showed a free T4 of 1.69 ng/dL, and thyroid stimu-* F/ e2 U$ v( y. ~
lating hormone level was 1.3 µIU/mL (both normal).1 Q- }4 b& L0 o. x2 k9 f5 x
The concentrations of serum electrolytes, blood
2 N% A# f# N) l. l& r! c- _urea nitrogen, creatinine, and calcium all were/ ]2 @" R; p. H* _/ U9 m; Q
within normal range for his age. The concentration" t! o$ d- O. T4 h( s. w# \
of serum 17-hydroxyprogesterone was 16 ng/dL' k6 S! x |) b1 i
(normal, 3 to 90 ng/dL), androstenedione was 20$ x+ r- S& z8 D
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-+ @* R8 r$ `# V$ G
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
8 s$ p) _) f; {5 w2 r+ ]desoxycorticosterone was 4.3 ng/dL (normal, 7 to5 S) @* C5 o8 a$ m
49ng/dL), 11-desoxycortisol (specific compound S)# U' v% _+ D3 @, c- p! }* A
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
# L N* j8 x- u, J" f( [" atisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total; j l/ s3 \- M2 ^
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),% z* N4 K0 Y9 D# R8 P
and β-human chorionic gonadotropin was less than) k3 `7 l) Z4 F
5 mIU/mL (normal <5 mIU/mL). Serum follicular) C v! `8 g, K# B o# q
stimulating hormone and leuteinizing hormone% J* L# B9 Y. H& ^+ d5 T3 t! D
concentrations were less than 0.05 mIU/mL) m1 e' e$ O' N& K/ P3 q6 {
(prepubertal). X. Q. C; [7 C! q& @
The parents were notified about the laboratory% v+ p) t; m4 c7 S! ^
results and were informed that all of the tests were$ l) z6 i* X, m; h
normal except the testosterone level was high. The- C# ]; x* w ^. e
follow-up visit was arranged within a few weeks to, L6 j5 Q- @3 ~( i4 m) y
obtain testicular and abdominal sonograms; how-
" B5 V$ s4 |* N0 S6 M+ P# G) wever, the family did not return for 4 months.- A$ c1 E5 d9 Q3 {3 {5 H: C
Physical examination at this time revealed that the
4 K$ D4 Z& g9 ?) \1 \& dchild had grown 2.5 cm in 4 months and had gained! d# @ V$ S: H: Y' R
2 kg of weight. Physical examination remained: I+ ?, T$ y/ H& E
unchanged. Surprisingly, the pubic hair almost com-( k+ O! _' L- ?" y7 H
pletely disappeared except for a few vellous hairs at. D! H' F/ Y7 J% A. l7 @3 z
the base of the phallus. Testicular volume was still 2
' a; m* V n4 q' k$ \mL, and the size of the penis remained unchanged.
/ e/ a3 B7 p: i4 P2 m: J4 b0 w O. @2 JThe mother also said that the boy was no longer hav-% z7 j9 L \" X/ ~, T. s
ing frequent erections.* F# v. Q& b1 `3 k4 P+ j; r% u. C) W
Both parents were again questioned about use of
2 @. S: E: T+ L1 i% zany ointment/creams that they may have applied to( C) C# Y" @5 v* x' J
the child’s skin. This time the father admitted the
3 O4 z7 Z1 H& }Topical Testosterone Exposure / Bhowmick et al 541
2 a5 W7 m7 ^ C( |# ^8 U+ \* Fuse of testosterone gel twice daily that he was apply-
+ `% w) q2 O. W7 j8 @7 [" x7 ling over his own shoulders, chest, and back area for9 V) |6 N4 ~, p0 x! m, }( Z
a year. The father also revealed he was embarrassed8 E6 N2 j; f9 f- S3 M* [- i0 u
to disclose that he was using a testosterone gel pre-
) q2 b- ~9 _7 l1 Uscribed by his family physician for decreased libido9 j9 f( B' z2 W
secondary to depression. W" Y% Q% S6 | r5 x. Z
The child slept in the same bed with parents.- ~9 L6 [& J- [
The father would hug the baby and hold him on his
/ a& N$ u# D( V6 D5 f% K3 achest for a considerable period of time, causing sig-$ ~4 l6 ^# z4 g0 A& N* `* _# u( ?
nificant bare skin contact between baby and father.
7 N+ \+ b& @( H( Y) ?5 E- n: |The father also admitted that after the phone call,$ V% S. P. @6 ] a
when he learned the testosterone level in the baby
. w; _ X, I6 C3 Dwas high, he then read the product information
* P+ X% n/ p/ S8 a# z0 V: L. p- [packet and concluded that it was most likely the rea-
/ @$ R9 q7 b b) \3 Json for the child’s virilization. At that time, they$ k. {1 T% i# F+ n/ g; b
decided to put the baby in a separate bed, and the
# S! G8 _9 j0 Vfather was not hugging him with bare skin and had" a. i, M. z$ ?5 Y8 C
been using protective clothing. A repeat testosterone
* G8 E' L& F0 b# t) A6 }. \( B; ^4 wtest was ordered, but the family did not go to the: ~4 D$ U" A' O2 l7 \# j
laboratory to obtain the test.! u0 b; x2 \: x$ p5 J8 Q/ ]7 m2 Q
Discussion
/ d$ n/ s8 E7 p+ m SPrecocious puberty in boys is defined as secondary0 x2 {6 E) W8 U1 D; Q
sexual development before 9 years of age.1,4
$ ^! |# _4 A! S# EPrecocious puberty is termed as central (true) when
6 a3 ]+ O! ^* `# D$ m/ p1 @it is caused by the premature activation of hypo-- t f5 z5 {& r7 d: U: E' V/ u3 s
thalamic pituitary gonadal axis. CPP is more com-
) u4 A/ K( ~" Qmon in girls than in boys.1,3 Most boys with CPP
5 M2 C( d0 z8 `0 y, x! H) |3 dmay have a central nervous system lesion that is
. _5 n/ f7 y1 [, Y( n5 ]responsible for the early activation of the hypothal-
( D( C" z' ^& r% v* W/ `& h* Y6 vamic pituitary gonadal axis.1-3 Thus, greater empha-) ?# | @) e9 U. ]. V$ I/ s5 n6 c8 @
sis has been given to neuroradiologic imaging in7 G! w/ A T! H6 U D! R
boys with precocious puberty. In addition to viril-
1 F3 W* h& G+ h# c) Xization, the clinical hallmark of CPP is the symmet-" \5 K) U) r; O/ g
rical testicular growth secondary to stimulation by) A9 r N7 y& g" g) Q# ~0 x5 D( T$ k
gonadotropins.1,3! a. A$ Z3 O. R6 E/ p" W! S, I
Gonadotropin-independent peripheral preco-
1 q ]9 F" f I% H4 y% Pcious puberty in boys also results from inappropriate
5 a- E1 G% g& ^androgenic stimulation from either endogenous or. l( X1 E6 ~! q
exogenous sources, nonpituitary gonadotropin stim-6 y4 M5 i( a4 u1 s/ C# x
ulation, and rare activating mutations.3 Virilizing
( s. j" A, K7 w8 K+ t+ mcongenital adrenal hyperplasia producing excessive1 Y6 i/ h2 d3 G2 y0 L
adrenal androgens is a common cause of precocious
9 V* m5 h, M3 Ypuberty in boys.3,4
1 {, C, \9 w D0 a7 s8 W* L6 E( VThe most common form of congenital adrenal
0 w$ R% S3 e+ w h$ d* qhyperplasia is the 21-hydroxylase enzyme deficiency. R% J$ M2 P. o
The 11-β hydroxylase deficiency may also result in
1 v$ L3 C1 M5 G% _/ y1 X; ?9 M8 oexcessive adrenal androgen production, and rarely,1 ^/ Q/ J& X( x" q4 |+ f
an adrenal tumor may also cause adrenal androgen/ U6 G/ B/ m, b* p# j5 L9 X
excess.1,3( T; a) t- x4 @* `+ F. c
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from/ F. E1 P7 i8 ]% s
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007" `6 r/ _/ C0 c" d- [' a; w! q
A unique entity of male-limited gonadotropin-
4 e, m7 U5 Z% C* Y6 ~independent precocious puberty, which is also known/ t/ n- Q0 t! v: T
as testotoxicosis, may cause precocious puberty at a: c7 G, ^7 a6 K) c$ g* g; P( t2 l2 U
very young age. The physical findings in these boys z* ~- M3 A/ K' @
with this disorder are full pubertal development," b, H d5 B; Q) g
including bilateral testicular growth, similar to boys; h. Z- @8 R* A* V2 e
with CPP. The gonadotropin levels in this disorder% p. `+ q( C1 k! I9 m
are suppressed to prepubertal levels and do not show& h1 b8 O: F! x4 ^5 x; l2 R( S x: ?
pubertal response of gonadotropin after gonadotropin-; U7 q k- F9 o, K2 n: y
releasing hormone stimulation. This is a sex-linked
0 E; H7 U8 Y& A( }! T }$ ?$ Fautosomal dominant disorder that affects only
: T. y# @4 E' {$ x5 c; nmales; therefore, other male members of the family
) p0 P; v% e/ I3 [# vmay have similar precocious puberty.3
. f8 F1 e0 q$ H- I6 U$ p$ k5 QIn our patient, physical examination was incon-/ i4 h4 {/ x$ [+ t$ p5 L
sistent with true precocious puberty since his testi-
0 Q. v& Z; W2 d0 e3 pcles were prepubertal in size. However, testotoxicosis% {, X! L$ [; e9 g
was in the differential diagnosis because his father
# l, p$ F+ j% e& z' X5 I5 dstarted puberty somewhat early, and occasionally,1 e! u, _: u. a" N8 n
testicular enlargement is not that evident in the5 M3 _# ?+ j0 @ T6 R
beginning of this process.1 In the absence of a neg-
% T r7 F+ R- g5 F0 \ative initial history of androgen exposure, our+ ~$ {7 k9 O. N5 X$ u3 ]1 |, j j- |
biggest concern was virilizing adrenal hyperplasia,; Y- v! M* G6 G$ ]* e/ e; E+ k% _
either 21-hydroxylase deficiency or 11-β hydroxylase
3 V$ L [( U- N2 F4 ~& M% V0 Vdeficiency. Those diagnoses were excluded by find-" X. c' }3 E& B2 l A
ing the normal level of adrenal steroids.
6 L4 }9 u5 ?1 x$ t2 D8 p) }The diagnosis of exogenous androgens was strongly9 j* Y0 b( v- d6 E7 W. d! I) t( W
suspected in a follow-up visit after 4 months because
) S) _0 i! E; O! ethe physical examination revealed the complete disap-1 L% m' B9 H& _
pearance of pubic hair, normal growth velocity, and. B; ~6 j4 k. q) N% Z) E
decreased erections. The father admitted using a testos-6 H9 `* G/ n$ s4 a
terone gel, which he concealed at first visit. He was
2 j! q9 A* y, p$ Q9 Q( {, i7 p. \, g+ |using it rather frequently, twice a day. The Physicians’
0 f/ J$ k* ?6 R8 ~' H- }, S/ PDesk Reference, or package insert of this product, gel or1 C4 s* X: l: v7 E1 m
cream, cautions about dermal testosterone transfer to9 s! X- |# z' }' {% I
unprotected females through direct skin exposure.
7 o7 k: d' `3 K9 j2 k: n) wSerum testosterone level was found to be 2 times the2 [# e) H* U+ G) X$ o7 ?
baseline value in those females who were exposed to
& Y& ], P. o1 ]8 X, ~even 15 minutes of direct skin contact with their male
4 w; {3 M; h1 Hpartners.6 However, when a shirt covered the applica-
! n0 p2 C* \8 C5 \) Etion site, this testosterone transfer was prevented.1 k4 y7 h. V ~; S8 R* f5 n- G$ I
Our patient’s testosterone level was 60 ng/mL,
3 A6 K1 ^8 G2 G, X- y* v$ f1 Wwhich was clearly high. Some studies suggest that
/ f9 J& M# K3 E' V- ]dermal conversion of testosterone to dihydrotestos-
6 Z, N; a; N( e7 T dterone, which is a more potent metabolite, is more+ ^ y: ?3 q- R: h2 `
active in young children exposed to testosterone% ~1 h6 w' l: X3 ]* ^0 m3 V* o( ~
exogenously7; however, we did not measure a dihy-
- r+ C8 T u( G$ i, Ndrotestosterone level in our patient. In addition to9 R6 H2 i2 T6 g9 c/ T5 M
virilization, exposure to exogenous testosterone in
2 I5 N/ T* u, E& ?4 n& Ychildren results in an increase in growth velocity and% R1 p" b' \( Q; o7 r5 _2 {* {$ V
advanced bone age, as seen in our patient.
! X8 y6 u+ E) L7 MThe long-term effect of androgen exposure during" h( K; p* X M/ L& n4 j* L Q* ] f
early childhood on pubertal development and final: n O" `5 q2 l' F) B" T' K
adult height are not fully known and always remain
$ Z; J) o; d, a( S2 \1 o* [a concern. Children treated with short-term testos-
( l1 p, P2 Q" n+ M8 C0 Hterone injection or topical androgen may exhibit some/ \8 v T! Q1 L- G
acceleration of the skeletal maturation; however, after
; _" k Z2 N2 D# O4 ]4 q, x9 }* A2 Gcessation of treatment, the rate of bone maturation
9 B8 n1 Z% Z- L* @decelerates and gradually returns to normal.8,9* G& t7 Z: B2 w2 [) N+ ~; k
There are conflicting reports and controversy8 z" s) E, I7 W, U8 H
over the effect of early androgen exposure on adult
* q# ?" S3 k4 G+ j7 npenile length.10,11 Some reports suggest subnormal
& c# Y5 t( ?* t% S' tadult penile length, apparently because of downreg-
% V3 s; X0 \& V4 P' ]+ fulation of androgen receptor number.10,12 However,
# c" {1 n' Q8 ~. @5 e. d8 aSutherland et al13 did not find a correlation between
% d( _, k& }8 U& M. fchildhood testosterone exposure and reduced adult$ Q$ n* a- y+ |1 K A
penile length in clinical studies." F1 V+ }) m: k8 e6 n' }" }! o: ~
Nonetheless, we do not believe our patient is: X# n( s6 \6 r- T0 n8 D
going to experience any of the untoward effects from
( R) Q' c- K! Q- |1 h! Ztestosterone exposure as mentioned earlier because0 ~: g# K. H) n7 n
the exposure was not for a prolonged period of time.9 ?$ c# d# n7 L5 E- B& [( ]1 m
Although the bone age was advanced at the time of
% {. A: d/ X7 w% ~9 G9 Kdiagnosis, the child had a normal growth velocity at8 u+ v2 p# @7 Z) j; u: L' e4 y' |
the follow-up visit. It is hoped that his final adult6 L/ {: N& g0 B" u8 t
height will not be affected.
; E: d! ~: c5 d+ u3 k6 a+ AAlthough rarely reported, the widespread avail-
5 A( f& {- d+ F3 E O& ]7 Dability of androgen products in our society may
+ I+ W" L) b' _; D5 s( lindeed cause more virilization in male or female1 [3 i$ o7 {1 g$ j
children than one would realize. Exposure to andro-
% r; b& t% ]/ q2 I7 F6 Q6 J, ]gen products must be considered and specific ques-' V8 j* _! t6 Q7 }2 Z
tioning about the use of a testosterone product or4 X _( K3 q9 K1 S
gel should be asked of the family members during
$ H6 L% c' n0 ?# C5 X1 Z0 d/ Q) Xthe evaluation of any children who present with vir-) S2 B/ v% p) X4 h& ]! G
ilization or peripheral precocious puberty. The diag-; c& [, E% \/ p2 |: Z: Z
nosis can be established by just a few tests and by f, ], ^2 B9 T9 G
appropriate history. The inability to obtain such a6 ~& I H. E2 f! m. s, o
history, or failure to ask the specific questions, may
' h- o) f$ e) u' p( \ sresult in extensive, unnecessary, and expensive! K# u! r7 J, O0 ^! j& P
investigation. The primary care physician should be
: q1 U( t6 I7 c, l+ Uaware of this fact, because most of these children
2 u. `! r- o( m2 x9 `* ~" l5 amay initially present in their practice. The Physicians’
6 l6 t6 e9 \4 L) V4 U8 WDesk Reference and package insert should also put a2 P- t2 c; {+ p5 K; l
warning about the virilizing effect on a male or
( `; a; p, o+ t( d& b7 l& T& |5 B1 Ifemale child who might come in contact with some-
( b1 [, l3 _$ S. ]one using any of these products., R, Q. @5 r# R, F- ^0 V- @
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5 d. U1 @" _. t8 ~7 e6 i# T6 P- D' {( l1. Styne DM. The testes: disorder of sexual differentiation' e* s0 [8 M1 C0 a
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;4 W- c% L) n" j
2002: 565-628.& q: u9 I% Q, e: \
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
' c, ~$ ~) j7 d0 N! ppuberty in children with tumours of the suprasellar pineal
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& ` Y6 a6 q2 R7 r5 b% |areas: organic central precocious puberty. Acta Paediatr.+ c8 D, p+ Y2 u. j0 A4 I; [% m
2001;90:751-756.& y1 n# R% w9 v) \+ l
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.# ^: F3 j1 {+ G7 C* u C
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
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development in a two-year-old boy induced by topical- m- {' P7 ^8 K
exposure to testosterone. Pediatrics. 1999;104:e23." _, \3 F2 d% n# b# i. D
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of8 l; o$ I O3 F8 X. {
Skeletal Development of the Hand and Wrist. 2nd ed.8 h: S9 h( Z# z, f/ e: }" g) h: y
Stanford, CA: Stanford University Press; 1959.! g; z( ~& ~& e6 g3 l
6. Physicians’ Desk Reference. Androgel 1% testosterone,2 f6 j( P3 a3 y7 M, ]* I4 D7 I! R6 }. A
Unimed Pharmaceutical Inc. Montvale, NJ: Medical$ C8 R$ x8 m$ O8 v# H, e" [
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