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is a significant concern for physicians. Central% X1 T8 F1 Q9 ?
precocious puberty (CPP), which is mediated
4 n+ U: n" F. u: p S1 [4 vthrough the hypothalamic pituitary gonadal axis, has
) m9 {9 f4 x; E4 [$ [a higher incidence of organic central nervous system
0 E6 v5 E2 a9 [+ }lesions in boys.1,2 Virilization in boys, as manifested
% x6 N6 I! Y4 `0 G( tby enlargement of the penis, development of pubic' g/ E) Q! O; n. G
hair, and facial acne without enlargement of testi-3 F) w/ h" R/ b" P# V
cles, suggests peripheral or pseudopuberty.1-3 We
8 V# A, B3 k+ G5 q" y$ Yreport a 16-month-old boy who presented with the
% W* K* W! a# d- xenlargement of the phallus and pubic hair develop-
. }, x9 D" y3 k5 `7 z9 N, t, _4 tment without testicular enlargement, which was due
1 Q1 h# V% Z% j2 Q, x7 ]to the unintentional exposure to androgen gel used by
2 R( o h3 L+ @/ Y& F3 X2 Z3 d4 ^' K' m' mthe father. The family initially concealed this infor-
! C( E a- \8 r$ v) c; } Smation, resulting in an extensive work-up for this/ ^: x0 E) b# J' K/ Y2 V8 e) q
child. Given the widespread and easy availability of
. Y. N' v0 ]0 v) x) u# [. b2 rtestosterone gel and cream, we believe this is proba-
4 y3 s2 N' Y. D) k: F$ pbly more common than the rare case report in the
) p( }! p1 t) C0 ~/ M2 A7 \$ Dliterature.4
7 T5 B$ H. Q( {2 u! W% \ W" @$ FPatient Report- P: Y# z( s4 M4 C' Z+ |0 Q, K. O
A 16-month-old white child was referred to the/ R8 E9 @: F3 Y0 J) I- {
endocrine clinic by his pediatrician with the concern, U9 a) w2 |( m* D. ?5 h
of early sexual development. His mother noticed6 f' t! o: P* G. | t$ W
light colored pubic hair development when he was8 R3 ~, V+ k) g2 V) H
From the 1Division of Pediatric Endocrinology, 2University of
' V! O) i, W; uSouth Alabama Medical Center, Mobile, Alabama.
) O5 M& Z* J; H4 iAddress correspondence to: Samar K. Bhowmick, MD, FACE,
# x9 q ?1 R8 Y6 HProfessor of Pediatrics, University of South Alabama, College of
' }. M: ^, }1 aMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;) J O0 F- {# J# b: u+ V
e-mail: [email protected].
1 @. H) a# ^- V) v W+ }0 qabout 6 to 7 months old, which progressively became
' g: R1 p) _( b: @: Y5 [; x! D+ @, w" d+ Hdarker. She was also concerned about the enlarge-; g! _2 N( b) |: d+ Q9 p/ i: i# c
ment of his penis and frequent erections. The child+ `: i) t. Q. Y: g4 q+ ?
was the product of a full-term normal delivery, with8 p! Y) G$ G* d
a birth weight of 7 lb 14 oz, and birth length of
/ K* w+ b- R7 y/ ^. ?20 inches. He was breast-fed throughout the first year
# W5 ~/ t3 E5 ?+ x$ ?0 G* tof life and was still receiving breast milk along with
& Z) |! u- u/ Vsolid food. He had no hospitalizations or surgery,
y, U5 ]7 B _, {8 @( A3 aand his psychosocial and psychomotor development
- N6 s0 t: Q9 `was age appropriate.
- |3 l" @+ r+ I1 \4 _/ b2 r- j, kThe family history was remarkable for the father,
0 Y& g7 i. w, F- E) a2 t5 twho was diagnosed with hypothyroidism at age 16,
: p+ ] {. ?& B3 B# Uwhich was treated with thyroxine. The father’s
4 e# ]' s. W1 j* A. }height was 6 feet, and he went through a somewhat
" p; f2 E' H$ k+ g2 ?early puberty and had stopped growing by age 14.
0 m6 v" [. a7 i; Z9 u( p4 c, e: L0 lThe father denied taking any other medication. The. z7 U1 W6 D; I0 l5 g+ f1 N& W6 N
child’s mother was in good health. Her menarche- m1 p3 z2 m! X% e
was at 11 years of age, and her height was at 5 feet
! | A' u# n. D1 z5 N7 n& J8 O5 inches. There was no other family history of pre-' l, ~4 H; p2 ^ Q
cocious sexual development in the first-degree rela-
) J, d! K1 m. y) ?tives. There were no siblings.' L' S0 U' x% a
Physical Examination. o" R/ \( I' U7 s# K& I4 o0 f; ]
The physical examination revealed a very active,% l% d# p/ g+ F! I7 ~+ M/ E
playful, and healthy boy. The vital signs documented
' a4 Z/ }* G! M. `5 |* ]; {a blood pressure of 85/50 mm Hg, his length was
. i* W0 d' a& K- Q1 C X90 cm (>97th percentile), and his weight was 14.4 kg, E/ T" z* o& \! X
(also >97th percentile). The observed yearly growth, H$ g. D, I7 e: q) @6 H2 \
velocity was 30 cm (12 inches). The examination of
7 d# ^7 e; H# [8 W; o! y, Q |the neck revealed no thyroid enlargement.
4 C, ?# t# K( N2 Q- FThe genitourinary examination was remarkable for
5 O, l1 S9 @; V Jenlargement of the penis, with a stretched length of3 D: ~7 V4 U, \5 E( K
8 cm and a width of 2 cm. The glans penis was very well9 `# u: ]% }6 a* y
developed. The pubic hair was Tanner II, mostly around
8 H. ~& v* t9 l4 t- Z540 q. B* J# L9 I$ d* F
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) R% P5 D% K z
the base of the phallus and was dark and curled. The
# K6 M/ T: Y. |2 ]% b# ]3 {+ Ftesticular volume was prepubertal at 2 mL each.
s- [' H$ j8 H( LThe skin was moist and smooth and somewhat
! s& { V0 U, moily. No axillary hair was noted. There were no
5 g6 P+ A- d/ I5 v* }abnormal skin pigmentations or café-au-lait spots.
0 d: a- K- `& _" q' c+ |' mNeurologic evaluation showed deep tendon reflex 2+
: N" k& _+ s6 p! ebilateral and symmetrical. There was no suggestion
* B0 Y. _. ~: R% H9 ]of papilledema.1 @9 j1 q$ c6 m- p2 l8 \
Laboratory Evaluation9 Q( g0 q1 |$ T, g* X9 h7 _( j+ ]
The bone age was consistent with 28 months by
) E5 Q! B4 r- `; ?/ qusing the standard of Greulich and Pyle at a chrono-: |) s+ {# T! _0 N5 _- z4 f# n3 z/ C
logic age of 16 months (advanced).5 Chromosomal
4 Z+ V: Q3 V; w9 o$ G. ]karyotype was 46XY. The thyroid function test
( R" y, Z. X: t$ ~showed a free T4 of 1.69 ng/dL, and thyroid stimu-: G0 `4 C1 g8 R" b8 g. p
lating hormone level was 1.3 µIU/mL (both normal).6 Q/ @7 a. p3 M' h
The concentrations of serum electrolytes, blood* A" C. z3 W' ?& r+ S" G
urea nitrogen, creatinine, and calcium all were
% P! W/ K! J- ^/ d6 S- ? Jwithin normal range for his age. The concentration
- m) Q v+ t$ _ l3 ]* u( K! zof serum 17-hydroxyprogesterone was 16 ng/dL, g( j+ C8 }% ?
(normal, 3 to 90 ng/dL), androstenedione was 20! | A# p# U* l. m1 J
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-8 t& M5 e! a4 }' G- s" J) A# k6 }
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
$ n+ S6 f/ W, b6 z* Qdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
: R' ~/ O/ d7 y) Q+ t49ng/dL), 11-desoxycortisol (specific compound S)
/ F0 ~2 t+ E6 \ ~0 zwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-) E+ T: O, G" X3 Z+ }; W
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total$ X s) ~) @( @- H
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),$ G) J9 C2 o4 h5 I; B+ a8 B
and β-human chorionic gonadotropin was less than
( W( h5 }4 @) _! y1 |% \' t5 mIU/mL (normal <5 mIU/mL). Serum follicular8 ]3 _4 g; ]( g2 F
stimulating hormone and leuteinizing hormone8 _, @# v4 g# s/ c
concentrations were less than 0.05 mIU/mL* ^: i' U2 U) `6 _% T
(prepubertal).
; D( M# i# E4 Y& d. _7 U6 aThe parents were notified about the laboratory
3 S. Q4 K6 @* b( Nresults and were informed that all of the tests were) a1 `; L/ C1 | o7 v, |/ p1 I
normal except the testosterone level was high. The
" z7 y1 F T% @) Y5 ^: ?7 m' Ufollow-up visit was arranged within a few weeks to, h) w: b; C/ j+ M- K% e9 a
obtain testicular and abdominal sonograms; how-8 ~9 g2 w2 a1 D, Y7 K
ever, the family did not return for 4 months.
/ L- }$ O4 F; |$ g2 l: ZPhysical examination at this time revealed that the, B/ p# i. j% k& r: O4 C, }
child had grown 2.5 cm in 4 months and had gained5 h4 o9 s, o1 v
2 kg of weight. Physical examination remained
5 |: x- t7 A/ f. @& E* _; e$ k# [; Qunchanged. Surprisingly, the pubic hair almost com-
3 H2 W$ q: x8 H# ~) t jpletely disappeared except for a few vellous hairs at
" k! d# I; N# l$ X- P, i4 G' q2 g/ N. athe base of the phallus. Testicular volume was still 2
' I4 v: S3 q( n/ N$ i% X/ n' x! P4 XmL, and the size of the penis remained unchanged.& M: `4 {2 i" I
The mother also said that the boy was no longer hav-
2 V& w) s1 m" U) W9 Y* }ing frequent erections./ g" Z+ n/ k$ l9 T1 T4 Y* i
Both parents were again questioned about use of: Z; z1 q# {; H5 h9 t. o" N, l
any ointment/creams that they may have applied to
5 Y B! s8 ]9 S1 p; sthe child’s skin. This time the father admitted the1 }5 T1 _& z; t
Topical Testosterone Exposure / Bhowmick et al 541: N6 s3 X8 q, d; m
use of testosterone gel twice daily that he was apply-
$ _2 ]! l- J7 b" p( u& o* ping over his own shoulders, chest, and back area for
0 T2 y; k& y( M# C: Sa year. The father also revealed he was embarrassed
1 ~9 n1 [ [0 }* p @to disclose that he was using a testosterone gel pre-
5 c; K9 A( z/ h. v+ l( Nscribed by his family physician for decreased libido4 r9 n9 L3 z( s4 t5 J9 q
secondary to depression., ]7 G) S2 _& p. Z6 T
The child slept in the same bed with parents.
) @& [# M% ]5 z: @: @; [6 bThe father would hug the baby and hold him on his
0 m' C) v, ~9 Z5 Ychest for a considerable period of time, causing sig-* } F; |$ t% a3 W+ y
nificant bare skin contact between baby and father.1 _( j8 ^. X7 e$ t* |' l9 R
The father also admitted that after the phone call,
3 h% {7 n% |/ Y7 l' jwhen he learned the testosterone level in the baby
: s( |1 Z% B2 G7 h- Q8 Z, u% }7 t1 ]was high, he then read the product information
/ s S$ O( o4 kpacket and concluded that it was most likely the rea-
, L2 I: n! v8 o; _4 e- X3 uson for the child’s virilization. At that time, they
5 m# o7 y& P. z7 T- Q& E9 U- Udecided to put the baby in a separate bed, and the1 L1 x& L* a1 _8 H7 q" {* U# U) F
father was not hugging him with bare skin and had
. ]& b9 i: f+ R' ?$ i$ a7 {been using protective clothing. A repeat testosterone! R5 |, F" e4 E- @4 F
test was ordered, but the family did not go to the
- i- ^! ^8 b' f9 Y7 Y" }, Hlaboratory to obtain the test.0 Q0 q( J# U6 C+ K
Discussion3 ~; ]& B/ ?5 r$ {! D$ Y3 |9 |
Precocious puberty in boys is defined as secondary
3 @- F. B$ r! F/ Esexual development before 9 years of age.1,4
3 X, X2 j5 x' uPrecocious puberty is termed as central (true) when
( i/ i5 Y, w" N/ a( y4 dit is caused by the premature activation of hypo-
: ^2 ^3 L' M+ ~3 M6 mthalamic pituitary gonadal axis. CPP is more com-
+ Y J% J1 i; U# L" Z! Wmon in girls than in boys.1,3 Most boys with CPP
2 p$ q& I4 O# C" n# }may have a central nervous system lesion that is
3 H8 I2 G0 D; X7 D: A* ?2 bresponsible for the early activation of the hypothal-3 C6 N8 o, e! U
amic pituitary gonadal axis.1-3 Thus, greater empha-7 h# U f/ Q1 o1 v
sis has been given to neuroradiologic imaging in- d$ [ F6 z" g9 z6 O
boys with precocious puberty. In addition to viril-
! o8 s( z, U" q4 M- D: Eization, the clinical hallmark of CPP is the symmet-/ L: }7 |- d& h6 t: U% k9 `& X
rical testicular growth secondary to stimulation by
$ F9 n( p1 y3 Y9 agonadotropins.1,3
% \+ N, y: L! o' CGonadotropin-independent peripheral preco- J) I2 p3 {- Z0 a5 b3 p: a4 I
cious puberty in boys also results from inappropriate' P6 S# k- r0 g1 l! S7 |- k8 q
androgenic stimulation from either endogenous or
6 W4 T7 x* w5 F* g- nexogenous sources, nonpituitary gonadotropin stim-4 E* }$ w" \) l2 f
ulation, and rare activating mutations.3 Virilizing! x) A0 s' S. U; L( D
congenital adrenal hyperplasia producing excessive0 g' R a5 R; X7 k% w6 u, p
adrenal androgens is a common cause of precocious
. F. Z- P# |" Bpuberty in boys.3,4, v& N3 o2 E8 o( @9 @3 p
The most common form of congenital adrenal8 K. i) y1 C/ L9 c
hyperplasia is the 21-hydroxylase enzyme deficiency.0 }% R# Z, d. @# \' e
The 11-β hydroxylase deficiency may also result in
8 A# @' X" G, I8 o3 S& ?excessive adrenal androgen production, and rarely,4 }# i k1 G O" Q7 ]1 b
an adrenal tumor may also cause adrenal androgen
; _" g9 y8 a+ p% N; k) L* t* p# cexcess.1,35 N. b& b4 x8 B( l. u; o
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
6 F) I/ n9 @/ E; s5 ?+ r- Z% q) u542 Clinical Pediatrics / Vol. 46, No. 6, July 20077 l# D) l l: }1 s
A unique entity of male-limited gonadotropin-
- o2 a# @# q$ E2 |- ?1 ]independent precocious puberty, which is also known
- @" x6 L& ~; y8 W! t. Uas testotoxicosis, may cause precocious puberty at a [+ t% ^/ K% E; f: N
very young age. The physical findings in these boys
+ a ?* W. C4 q4 j0 b Nwith this disorder are full pubertal development,
+ Y% _+ G. `( h# H% Z! A" ?including bilateral testicular growth, similar to boys2 D& e- g l" F- @. H% P% ~; Y9 Q
with CPP. The gonadotropin levels in this disorder/ A# z4 o& G- f8 \8 v
are suppressed to prepubertal levels and do not show5 J' U2 ]0 z1 ]# x
pubertal response of gonadotropin after gonadotropin-
" |4 I" `) g! `$ Sreleasing hormone stimulation. This is a sex-linked0 n' n8 g0 N( s1 R" m& O% l7 ?
autosomal dominant disorder that affects only! g9 V+ D( k9 S6 ]
males; therefore, other male members of the family
- ]0 d6 T; O7 d3 v3 K! _may have similar precocious puberty.3' S: e* q3 E2 E8 t( E7 R4 l" v
In our patient, physical examination was incon-
/ U) k% I! D" T$ k" m' Rsistent with true precocious puberty since his testi-
! {0 B9 Q9 e. M7 rcles were prepubertal in size. However, testotoxicosis% i$ ?3 j( x: ? ~; J
was in the differential diagnosis because his father
+ @: N* t, R0 m1 ?0 Lstarted puberty somewhat early, and occasionally,7 w7 q* \- u1 o6 `6 }! G4 w$ S3 z
testicular enlargement is not that evident in the
' X: k& A L$ s; J1 D1 T" a( Abeginning of this process.1 In the absence of a neg-
! t) E7 m# K6 v; P4 q4 v9 U1 \ative initial history of androgen exposure, our0 r8 @8 s* `) A! I O! j. b* N
biggest concern was virilizing adrenal hyperplasia,
& m' k1 n* ]5 P6 g( F4 ]5 U1 Geither 21-hydroxylase deficiency or 11-β hydroxylase! ]* t; w/ ?: \% S6 b9 Y5 I
deficiency. Those diagnoses were excluded by find-
( d6 `; ] `: n% X8 qing the normal level of adrenal steroids.
v+ }% g! t* w' T/ ]The diagnosis of exogenous androgens was strongly; E. a0 u' o5 `& ?& i
suspected in a follow-up visit after 4 months because
# D% Z5 z F9 P. H, mthe physical examination revealed the complete disap-) \5 Q! j% ~* `: Y) U! x" y: J; r
pearance of pubic hair, normal growth velocity, and. @5 i( Q& k5 P" P2 T
decreased erections. The father admitted using a testos-
, C$ d2 [4 J5 }: ~terone gel, which he concealed at first visit. He was0 E M5 f" R( k4 J
using it rather frequently, twice a day. The Physicians’5 c6 Z. x( }5 C" r# [( W5 p8 ]
Desk Reference, or package insert of this product, gel or
3 G- e3 d+ e9 c: u) T* v, I, ?cream, cautions about dermal testosterone transfer to/ Z8 U0 n% E& t3 E4 I% R
unprotected females through direct skin exposure." j2 r- F- h* E8 ?- l, V5 J. |
Serum testosterone level was found to be 2 times the
4 `9 j j4 j/ k8 y6 C1 pbaseline value in those females who were exposed to4 Y! \- ?# s* ?
even 15 minutes of direct skin contact with their male$ x r# @, f6 X( F! m
partners.6 However, when a shirt covered the applica-
. Z) m9 F( |9 M$ o; htion site, this testosterone transfer was prevented.- [2 O6 l' l6 H O9 h8 r- ]8 B
Our patient’s testosterone level was 60 ng/mL," H z) c& `1 v |" R5 h0 H. l( g$ @4 e
which was clearly high. Some studies suggest that
, F. d4 Y6 `0 Y7 w& p8 gdermal conversion of testosterone to dihydrotestos-
}6 Y% O6 Z+ A# E8 sterone, which is a more potent metabolite, is more
) X: F/ r+ z$ ^6 J+ j4 jactive in young children exposed to testosterone7 k9 d4 N0 v: m' @( N
exogenously7; however, we did not measure a dihy-
$ G& ^8 ^7 }% f2 x$ d" G# ddrotestosterone level in our patient. In addition to
! g y5 K1 l, i0 j# @7 R# M0 G: fvirilization, exposure to exogenous testosterone in& h) Y4 A' U# P+ n
children results in an increase in growth velocity and, a5 r4 t3 h7 \8 v$ t5 W3 z
advanced bone age, as seen in our patient.8 V* c" n5 M, k2 `- v7 |
The long-term effect of androgen exposure during! Y* ?' h6 Y# \7 N2 j' F$ R( z% N
early childhood on pubertal development and final
2 T: `. r" h! g0 L6 qadult height are not fully known and always remain
: Y1 o6 o* l$ x, N3 |a concern. Children treated with short-term testos-
( S1 ~2 ~5 [# K3 Y$ Dterone injection or topical androgen may exhibit some& h( X+ ~, b/ d; |3 b. N) h
acceleration of the skeletal maturation; however, after$ k3 H% ^& \, \# `' N
cessation of treatment, the rate of bone maturation0 g2 ]4 }+ Y; j2 L/ c( |
decelerates and gradually returns to normal.8,9# [. x( `2 l6 s4 K9 U, d$ H) T
There are conflicting reports and controversy' T& Q0 k" i! ?% |- L1 k% g
over the effect of early androgen exposure on adult
& y! v" }2 W x9 x6 s9 K7 q. fpenile length.10,11 Some reports suggest subnormal& A0 b" H: P% C4 F
adult penile length, apparently because of downreg-
! A# y& H( J# Z8 `! Iulation of androgen receptor number.10,12 However,
1 m$ P$ ^4 ^8 n4 GSutherland et al13 did not find a correlation between( {0 C& v, _6 G/ H3 A6 _4 a
childhood testosterone exposure and reduced adult# m1 g# o+ q& K. q) w6 M; X u9 [1 O
penile length in clinical studies.: s' |1 a' R; k# z, B( K
Nonetheless, we do not believe our patient is: D2 l9 G0 b" h5 D
going to experience any of the untoward effects from# {: h1 i. F: _5 T5 K2 _1 J
testosterone exposure as mentioned earlier because
) ?& Q" ]1 G" }* ?. Mthe exposure was not for a prolonged period of time.
: T- D( t' _) a/ ~5 F" MAlthough the bone age was advanced at the time of' q* t$ o) R) o7 X9 a
diagnosis, the child had a normal growth velocity at
/ d- C1 y9 c* F% Q# H# [the follow-up visit. It is hoped that his final adult
( _5 r0 O( s+ c' z1 kheight will not be affected.
6 q: w9 S, e1 S9 {+ S# JAlthough rarely reported, the widespread avail-7 d- [% n* g8 l/ z4 q0 O
ability of androgen products in our society may' F3 E- G6 K, N4 ]4 ^
indeed cause more virilization in male or female ~* l& v$ O; @ q7 o' p& P
children than one would realize. Exposure to andro-5 j) q# s% V" D
gen products must be considered and specific ques-
+ \7 I0 @" H- g7 [, Ltioning about the use of a testosterone product or* N) |8 ?* ?2 W9 i# ?
gel should be asked of the family members during: x+ I8 x" n2 g5 Z
the evaluation of any children who present with vir-
5 r5 g' v0 ^$ E/ @" dilization or peripheral precocious puberty. The diag-6 Q6 i, a, r4 S @9 U$ D7 ^
nosis can be established by just a few tests and by, [1 m3 \5 o$ y, w
appropriate history. The inability to obtain such a
; V# x" p' Y B khistory, or failure to ask the specific questions, may4 ~2 @# b4 ~. \5 Z, S! ?2 a
result in extensive, unnecessary, and expensive
; j/ z$ h7 N8 ^: e% i8 Z+ {investigation. The primary care physician should be$ Z( G1 R# |! J. T4 i
aware of this fact, because most of these children
: u" O& r, Q6 M4 S6 O0 d$ }may initially present in their practice. The Physicians’* q6 s; f# E# l
Desk Reference and package insert should also put a, U: k7 d4 x, u+ E9 O
warning about the virilizing effect on a male or
|9 l8 c& H( b) _6 n' rfemale child who might come in contact with some-9 r- U8 N1 n- _5 |
one using any of these products.
* E* S6 ^+ h* B8 ?) {7 `1 T# AReferences
$ R5 e& k# P0 z# ]1. Styne DM. The testes: disorder of sexual differentiation
4 w$ Y5 }" r0 O& N' d. u ]3 C# pand puberty in the male. In: Sperling MA, ed. Pediatric: f0 S. C9 w/ S! W1 e( |4 @$ v
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;; n. {+ A- Z4 Q4 d: O7 k
2002: 565-628./ y6 W' r9 I- g; W4 ? O1 U
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
% D. Y" A0 ` z3 I! }& dpuberty in children with tumours of the suprasellar pineal. Y [ R' g. @3 @- J" ]+ \' c
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$ o* M; ?( I b8 lareas: organic central precocious puberty. Acta Paediatr.5 D5 u5 w: D! |& { B+ ~' D
2001;90:751-756." x" p, w: f% G; M( Y# d l/ x! l
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed. {7 a C, d, y- s" s
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
* }) z! V4 D9 O! i) d9 zDekker Inc; 2003:211-238.; f( U& J4 i0 y$ \- K: u2 T% G/ [
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual* n) z% i! g$ |- C* O4 I
development in a two-year-old boy induced by topical
% Z, a0 a$ n. G. {- gexposure to testosterone. Pediatrics. 1999;104:e23.
m, p( L9 f* N0 }9 U/ Z- P) L5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
; u: ?! `" Y2 \' C7 z6 D" a0 aSkeletal Development of the Hand and Wrist. 2nd ed.5 {. x+ V. n* Z' P* I2 N
Stanford, CA: Stanford University Press; 1959.
: c, c! {! K. S1 o1 |& h3 Q6. Physicians’ Desk Reference. Androgel 1% testosterone,* s2 ]: o! j. U( _+ l# \
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
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