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is a significant concern for physicians. Central, M5 M. B- v; E2 z
precocious puberty (CPP), which is mediated
' b+ j( ^- v& f3 H7 L8 qthrough the hypothalamic pituitary gonadal axis, has, D/ F. a* m; E
a higher incidence of organic central nervous system9 ?2 x9 o, u- n6 Z5 U
lesions in boys.1,2 Virilization in boys, as manifested# S9 Z+ R6 l; v4 o; M" s
by enlargement of the penis, development of pubic
3 x |; F# s/ T+ d! p fhair, and facial acne without enlargement of testi-9 |. ~8 [8 ]: s& w+ N% [
cles, suggests peripheral or pseudopuberty.1-3 We0 a- s" s$ J8 w H- o
report a 16-month-old boy who presented with the3 e$ k; Q# h5 j
enlargement of the phallus and pubic hair develop-
$ x- i9 N* A& R, q* ^/ r5 o- {! Qment without testicular enlargement, which was due% j& _5 o5 s0 z6 |3 ]
to the unintentional exposure to androgen gel used by
. D& F5 E }9 a* P% k1 Fthe father. The family initially concealed this infor-. r, y$ m+ d1 D+ V( X* m1 [6 W: x+ g
mation, resulting in an extensive work-up for this* e: {: e9 n, x5 G% L0 i
child. Given the widespread and easy availability of0 J7 N( Q7 \( w# d5 T
testosterone gel and cream, we believe this is proba-9 G% r" W# N: G: h1 N5 l9 I5 x
bly more common than the rare case report in the8 X5 B2 F1 Y) A, o% H3 _% K. Q
literature.47 p& H7 _4 v( F% B$ a; ~6 S
Patient Report
. j% x- m1 `1 ?; wA 16-month-old white child was referred to the
1 v* q* h+ {5 F9 ?0 }5 w- [endocrine clinic by his pediatrician with the concern
$ ?* F$ ]1 c6 P: vof early sexual development. His mother noticed3 I6 T2 n1 C a0 |
light colored pubic hair development when he was
! ? L* q8 U) FFrom the 1Division of Pediatric Endocrinology, 2University of' d7 w9 X0 R! E2 ~2 P3 E
South Alabama Medical Center, Mobile, Alabama.
# i6 @& j* L& f' J/ P9 CAddress correspondence to: Samar K. Bhowmick, MD, FACE,9 H" ~/ @- C5 y n/ I
Professor of Pediatrics, University of South Alabama, College of- q! e6 P2 b/ t) O9 ~
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
0 c+ L3 g; t! Y9 \" S( We-mail: [email protected].
" j0 i: a0 j8 o( U# c& Z5 ]: m* jabout 6 to 7 months old, which progressively became
, Y- W1 E% H3 S! b' @* p: z$ |/ d; fdarker. She was also concerned about the enlarge-
! M/ I- L9 \0 X" w2 w% V' lment of his penis and frequent erections. The child" Y* F g3 b4 c
was the product of a full-term normal delivery, with9 O' O) V6 Y& g. {) o
a birth weight of 7 lb 14 oz, and birth length of
A% {4 S! ]& r1 i& g2 S7 J5 Y20 inches. He was breast-fed throughout the first year
6 i( x1 q) Q# E5 jof life and was still receiving breast milk along with1 K! |1 D: X( ], { K
solid food. He had no hospitalizations or surgery,
' e, Y. L- @( {& [1 Vand his psychosocial and psychomotor development
- g% O4 ~2 E- X6 v) b7 f; n% ]was age appropriate.
; e0 U; r7 N! g3 e7 ?( J2 tThe family history was remarkable for the father,( f3 t& l7 k: a4 N2 B
who was diagnosed with hypothyroidism at age 16,* @0 a% k7 y- m- U
which was treated with thyroxine. The father’s
- H6 W( p; P2 U0 `$ N0 _% {! y# ]height was 6 feet, and he went through a somewhat0 I5 o. m# L9 F. N% J
early puberty and had stopped growing by age 14.
8 P$ A' I- V( |( F; |. BThe father denied taking any other medication. The$ e7 L8 W% w9 T+ T& c8 w
child’s mother was in good health. Her menarche& P. b' x4 M' x3 G4 v" b: n; u
was at 11 years of age, and her height was at 5 feet0 T: r! [& u7 m0 T6 A
5 inches. There was no other family history of pre-5 S, F% t5 m9 }4 z1 {8 G
cocious sexual development in the first-degree rela-
" y5 y) r0 h* G }( m9 htives. There were no siblings.
" ?7 |9 E |/ y6 L5 p% D8 _9 jPhysical Examination; y# k, ^( p; r* V9 @
The physical examination revealed a very active,! g5 \2 C y" `. D' @
playful, and healthy boy. The vital signs documented2 Y! Z; e/ ?7 z/ H \3 P, N
a blood pressure of 85/50 mm Hg, his length was& e& N& M& F! W3 c( x
90 cm (>97th percentile), and his weight was 14.4 kg( S- j% ?8 q% D5 Y7 j: O1 u3 M+ B
(also >97th percentile). The observed yearly growth2 k- [; a7 Q- y7 Q. K! u% o
velocity was 30 cm (12 inches). The examination of
! [) K3 M4 Y1 H, {the neck revealed no thyroid enlargement.' b) x' k3 R; C0 `0 f; ^ M8 e ^
The genitourinary examination was remarkable for
6 W2 Q3 ^+ h9 f" p$ U* p& yenlargement of the penis, with a stretched length of1 C' z- B1 D$ G* y* k1 [# @: y, V
8 cm and a width of 2 cm. The glans penis was very well
: u: A# I1 }$ t9 bdeveloped. The pubic hair was Tanner II, mostly around
* k4 `7 K$ ?5 }5 X, _2 d3 D, h$ L! A5408 O7 K3 D4 x- z4 `3 }& a, d) X
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
: U! c# M3 n$ l, \' athe base of the phallus and was dark and curled. The, y, i& I( P7 @4 N4 b9 C
testicular volume was prepubertal at 2 mL each.
0 h: a9 F/ N. }* R8 ~The skin was moist and smooth and somewhat
9 b ]% ?$ H+ P: {7 R! b% w6 b. O( Qoily. No axillary hair was noted. There were no( s( x( g) x+ \/ a" i$ V: C
abnormal skin pigmentations or café-au-lait spots." i1 U. a' u' Q3 Q: n5 S
Neurologic evaluation showed deep tendon reflex 2+
6 k! f- j. J! P2 k. m: L/ }bilateral and symmetrical. There was no suggestion* ]# f4 E/ e3 g
of papilledema.
3 `8 x; @$ n$ F' R8 P4 E4 DLaboratory Evaluation1 i& R$ H$ _! f5 z( c
The bone age was consistent with 28 months by
b } s/ ]2 _* {using the standard of Greulich and Pyle at a chrono-
# [9 y7 B! A# a+ Z# u. Qlogic age of 16 months (advanced).5 Chromosomal
4 f3 M1 M+ x- y: Hkaryotype was 46XY. The thyroid function test3 S$ o0 f/ ?& F- z6 G8 _
showed a free T4 of 1.69 ng/dL, and thyroid stimu-; R+ N6 H" X& m2 {& A$ W
lating hormone level was 1.3 µIU/mL (both normal).
5 J* v( ?" M/ C+ }$ p- KThe concentrations of serum electrolytes, blood
- s+ _( {1 Y, purea nitrogen, creatinine, and calcium all were' O& ]% n( h' U2 P" Y
within normal range for his age. The concentration6 t7 x9 {8 h& W p. a& q; Q
of serum 17-hydroxyprogesterone was 16 ng/dL
; D5 O$ C9 k: ?(normal, 3 to 90 ng/dL), androstenedione was 203 Z& E5 ?9 {0 ^6 H' E$ ]
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-% S& q3 U- i: `" m! F$ f4 [1 s; S
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
& G% F" b0 ?& L* ~/ Q. Kdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
. \1 S9 h) e) {! O49ng/dL), 11-desoxycortisol (specific compound S)
' P1 w2 V& r+ gwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
+ t* w1 V! _8 c# X) F, vtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
8 v# F0 w6 H0 K3 B U+ n4 wtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),6 v: o6 q6 w) ^( F) c
and β-human chorionic gonadotropin was less than
: J3 K% g) h" T# L: W: ^5 mIU/mL (normal <5 mIU/mL). Serum follicular3 W! x0 d U9 K, y) M' O
stimulating hormone and leuteinizing hormone1 Z& n# Z% a f# R- U: v
concentrations were less than 0.05 mIU/mL1 J5 I) [' E) K7 |% {9 q
(prepubertal).
% x, P' A7 {# }$ N, ZThe parents were notified about the laboratory
) s X- H* d4 |8 j: F0 Z! I! o$ tresults and were informed that all of the tests were
& ~: q/ S2 t( ^ f: s+ ?+ c# [normal except the testosterone level was high. The; Y9 F5 x( L6 E3 R v4 E
follow-up visit was arranged within a few weeks to, z1 \( k5 z% u }' {
obtain testicular and abdominal sonograms; how-% i E0 @$ Y" }) @- I H4 D
ever, the family did not return for 4 months.0 v+ c! w: w& e
Physical examination at this time revealed that the
" [3 z- G7 V- Z2 V6 Bchild had grown 2.5 cm in 4 months and had gained9 y6 |/ x f( Y; K( t( \7 t
2 kg of weight. Physical examination remained7 v" j, N: Q- S+ y6 z f
unchanged. Surprisingly, the pubic hair almost com-, z% d w. o# ]. Q/ F
pletely disappeared except for a few vellous hairs at/ J' X4 `5 r9 c& s3 R; X( l$ R ^
the base of the phallus. Testicular volume was still 21 z1 }! |' _: O2 E& ~
mL, and the size of the penis remained unchanged.+ J) G# I1 d) s0 x0 x0 |+ C7 Q& k
The mother also said that the boy was no longer hav-
; n/ s: V$ b( h& v# O, o% Y; aing frequent erections.
' ]* d( s( i9 N- s6 pBoth parents were again questioned about use of
- ]% x+ x; ?8 b+ iany ointment/creams that they may have applied to
0 s/ `2 I1 |8 n/ F5 _0 S& t$ Qthe child’s skin. This time the father admitted the
& r% {+ E' T+ N$ d _7 wTopical Testosterone Exposure / Bhowmick et al 5410 j% P6 N- } l3 P! }
use of testosterone gel twice daily that he was apply-0 k" k% M8 H. i$ d' I5 Y
ing over his own shoulders, chest, and back area for/ @4 ]$ r( P& C1 ?% R( a) D
a year. The father also revealed he was embarrassed
/ P# ]* v) v) X$ j' Vto disclose that he was using a testosterone gel pre-) a* `' Z5 I- l+ Q3 v- f1 D; v' A/ J2 A
scribed by his family physician for decreased libido
0 A1 E6 o3 k/ P& _* [secondary to depression.- f s0 z; P# O
The child slept in the same bed with parents.$ E0 D, R9 s2 e3 I. n# E* y( W# T- e8 D& B( V
The father would hug the baby and hold him on his5 H, f4 L# g% t$ X
chest for a considerable period of time, causing sig-
! t" W0 x# K* p: y( S+ mnificant bare skin contact between baby and father.3 a* h7 O( x% |. g1 @
The father also admitted that after the phone call,( o; R7 Y+ C2 R
when he learned the testosterone level in the baby, z$ |- k! r2 T, _1 v- }* P
was high, he then read the product information4 }. C# V8 [, [ x0 C# _4 G
packet and concluded that it was most likely the rea-4 `7 ]- \" {5 a4 P; G1 w
son for the child’s virilization. At that time, they
3 \! u k4 c* u2 X. J* w; S* g6 ndecided to put the baby in a separate bed, and the4 M" c. {* G ^- y- z i
father was not hugging him with bare skin and had
- l) }/ I1 m; h) J5 P4 n0 dbeen using protective clothing. A repeat testosterone
1 a: ]0 z2 F) G/ rtest was ordered, but the family did not go to the" F& U( R, Y% S- @8 e
laboratory to obtain the test.
# J8 X; b1 V4 QDiscussion
+ K$ u( q# f! k7 G+ H/ ?3 cPrecocious puberty in boys is defined as secondary
! K" N2 k* ?8 ?+ [9 D! Psexual development before 9 years of age.1,4
1 i. Q& h& T6 x) h/ g' p" _$ TPrecocious puberty is termed as central (true) when
/ E9 M! m5 d5 Y; V$ u# pit is caused by the premature activation of hypo-4 S. Y- U! \+ I. |
thalamic pituitary gonadal axis. CPP is more com-
1 Y3 g& d$ Q( i D% k: wmon in girls than in boys.1,3 Most boys with CPP$ B! F/ I' { I4 A( a) C" o
may have a central nervous system lesion that is" r# w' N m( c( Q" _2 T
responsible for the early activation of the hypothal-
/ q8 U( t" C# C9 r, Z2 D1 A, damic pituitary gonadal axis.1-3 Thus, greater empha-
+ c# P4 n' H8 Z$ Gsis has been given to neuroradiologic imaging in9 B/ \7 G- Z1 T- L" j
boys with precocious puberty. In addition to viril-/ ~, z4 V: O# w# a5 H3 Q
ization, the clinical hallmark of CPP is the symmet-+ g8 b. |( q0 I; |4 P
rical testicular growth secondary to stimulation by C$ u; d: X: e! F
gonadotropins.1,3" q9 ^* V( G" ~- P( y _
Gonadotropin-independent peripheral preco-
W O, e- U$ N! X0 n7 ^- gcious puberty in boys also results from inappropriate
& F* a, D+ s! X5 e% M5 {% A4 ?, Eandrogenic stimulation from either endogenous or
0 K4 a0 Z) c3 W) v4 Z6 oexogenous sources, nonpituitary gonadotropin stim-
! r! u$ d: A7 Q. Q! s9 m9 t4 n, Yulation, and rare activating mutations.3 Virilizing
1 ?" C+ ^) U8 o% scongenital adrenal hyperplasia producing excessive6 E% Q8 n# @5 ^4 U4 x! Z
adrenal androgens is a common cause of precocious
2 x! w- X$ Q, U- U3 M1 f( t* p8 tpuberty in boys.3,4
4 d% h% w) v4 L" L: jThe most common form of congenital adrenal
3 h) x! ], ^9 x8 g8 g4 I- ghyperplasia is the 21-hydroxylase enzyme deficiency.2 P6 q/ L5 F7 ?) B5 Y* _
The 11-β hydroxylase deficiency may also result in1 \- y/ e3 q ?& D# b" }) L( [
excessive adrenal androgen production, and rarely,
0 a+ F& w4 ^5 t8 Q. k: _& a* L* v* San adrenal tumor may also cause adrenal androgen: a" ]' R; c) v- X
excess.1,3" v9 l! ~+ @0 d- J3 t! y
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 Y# {0 w$ L" P# w" l5 q& w# ?: t6 r( D
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
9 m. H# h! F+ |. ~6 Y7 h$ y- k+ S2 vA unique entity of male-limited gonadotropin-- }( F/ E$ x" ?1 V
independent precocious puberty, which is also known
9 `2 ^; t( }1 z, z# t5 `as testotoxicosis, may cause precocious puberty at a, E9 g$ k' d6 `8 k
very young age. The physical findings in these boys
7 Q: w9 O( t" v% _" K1 D7 Nwith this disorder are full pubertal development,
( B7 B# Y- T3 `7 y6 [4 Lincluding bilateral testicular growth, similar to boys) @: p1 ?( M3 w- t
with CPP. The gonadotropin levels in this disorder
" Q q6 N) U+ c/ U9 \; q, Lare suppressed to prepubertal levels and do not show
& |8 E9 ?' O: o! Ppubertal response of gonadotropin after gonadotropin-2 N: x; f7 V) a8 c# o: d0 K
releasing hormone stimulation. This is a sex-linked
1 u* J' R7 I% R: dautosomal dominant disorder that affects only
: z/ A2 C) z8 `1 ?. k9 s* r- Hmales; therefore, other male members of the family6 C! V- c1 n0 H0 S. v9 S3 \& `* Q6 P
may have similar precocious puberty.3
6 E& ?( f& H: M' L, O9 }In our patient, physical examination was incon-, ]+ Q" ?' X& d& I, n0 I% q
sistent with true precocious puberty since his testi-5 H5 ~# m6 }# ^
cles were prepubertal in size. However, testotoxicosis" |! ~" R# `: f1 J- A
was in the differential diagnosis because his father
* w* Q2 @' D+ S4 Bstarted puberty somewhat early, and occasionally,
3 I0 ~/ ^* Y) P6 T& ^% Ktesticular enlargement is not that evident in the
& d* g* H- x4 ^& `3 o( F* xbeginning of this process.1 In the absence of a neg-
1 J8 J5 k4 | S' V% j7 k( |ative initial history of androgen exposure, our
! T) p2 D1 Y9 R( D. Fbiggest concern was virilizing adrenal hyperplasia,
% F3 o; N- C3 T9 `3 f: f, Qeither 21-hydroxylase deficiency or 11-β hydroxylase
' h1 ~7 J- b4 B, P8 w1 ^' Xdeficiency. Those diagnoses were excluded by find-
5 S* M4 L4 ]1 H6 M( King the normal level of adrenal steroids.! h) e8 q3 x9 c. Q
The diagnosis of exogenous androgens was strongly0 K) M: Q$ s0 {8 V. w! Q
suspected in a follow-up visit after 4 months because
7 C1 D$ X% I. u* zthe physical examination revealed the complete disap-8 Q C* |7 c% D4 U
pearance of pubic hair, normal growth velocity, and2 N+ u9 _9 I) j- Y& V8 C
decreased erections. The father admitted using a testos-# U1 [+ G2 ~* X$ t2 Q" A8 g
terone gel, which he concealed at first visit. He was
, J3 l5 k) u2 z8 X! ?using it rather frequently, twice a day. The Physicians’0 N8 M2 U9 x& R( H
Desk Reference, or package insert of this product, gel or
3 N8 D6 X" _4 w3 r$ r0 u( Ucream, cautions about dermal testosterone transfer to0 J& q* q$ k8 U/ ^3 }
unprotected females through direct skin exposure.
1 n+ K0 h* U$ U9 CSerum testosterone level was found to be 2 times the
0 {5 D ~" H' r3 _baseline value in those females who were exposed to& N8 w: X- o1 n4 t
even 15 minutes of direct skin contact with their male
# b. G' z. ?9 Qpartners.6 However, when a shirt covered the applica-. r* k( C" Z" ~( o3 J
tion site, this testosterone transfer was prevented.
3 M! {' x! t8 O; M% I6 H8 P1 o$ f6 x# }Our patient’s testosterone level was 60 ng/mL,+ M0 n# C: k6 Y) `
which was clearly high. Some studies suggest that# F4 ^6 Z$ z2 M. z( @# F
dermal conversion of testosterone to dihydrotestos-- W W0 D% A+ E7 F- ^" _
terone, which is a more potent metabolite, is more% E% t7 n# P! v0 [
active in young children exposed to testosterone
1 {% |) b6 s8 m x4 Yexogenously7; however, we did not measure a dihy-
) L3 W6 K) G: ~$ E; ?1 Gdrotestosterone level in our patient. In addition to& s8 V6 v' O; A
virilization, exposure to exogenous testosterone in
( m+ _ ?+ ?1 S/ d6 Pchildren results in an increase in growth velocity and8 `2 `' [5 U" [5 B5 a' G. t9 m
advanced bone age, as seen in our patient.
R8 {* s) A2 i& bThe long-term effect of androgen exposure during [, w+ V4 M0 M) k+ w/ D
early childhood on pubertal development and final; B" v+ D. C; A' ?
adult height are not fully known and always remain
( S& |2 c% t0 Q! m% P" q/ ea concern. Children treated with short-term testos-
2 l6 X: N: y% ~3 o9 j1 L; Pterone injection or topical androgen may exhibit some
# C& n* f4 G2 I) R0 ]; aacceleration of the skeletal maturation; however, after% ~5 |$ x, u+ q* R
cessation of treatment, the rate of bone maturation5 ]6 W! B6 I; a
decelerates and gradually returns to normal.8,9& H# u+ V3 t& E* D, ?! m! p
There are conflicting reports and controversy
8 y6 M1 e3 b9 H- ?over the effect of early androgen exposure on adult
7 q t! q3 j& L; }$ O$ epenile length.10,11 Some reports suggest subnormal5 M7 l4 M# m, P! \9 Y9 p7 c
adult penile length, apparently because of downreg-& f( ]" ?. N3 n! ?. L( J& j) G
ulation of androgen receptor number.10,12 However,
& {1 Y; n) Y0 a0 w+ M) @Sutherland et al13 did not find a correlation between! B( N- p) R( L1 z
childhood testosterone exposure and reduced adult# }: n& a, }9 d5 p: R' Z1 B
penile length in clinical studies.
$ t; O3 r& J4 g7 `Nonetheless, we do not believe our patient is& l V1 b+ Z4 N) h! F5 l6 ~& w
going to experience any of the untoward effects from3 v+ R) P* [" ]6 [+ L7 W7 P
testosterone exposure as mentioned earlier because
8 j8 f$ I% H5 ^2 Jthe exposure was not for a prolonged period of time.
1 z0 K. p, j; K$ F! n6 mAlthough the bone age was advanced at the time of7 t7 l# D" M5 m; a& A
diagnosis, the child had a normal growth velocity at) b2 v9 q+ A3 X4 {' b8 C
the follow-up visit. It is hoped that his final adult
: [3 x* p1 {* ^" I+ Nheight will not be affected.2 l& `: p+ j' i( f9 O
Although rarely reported, the widespread avail-
1 j# B- n/ ~5 o* K" [$ fability of androgen products in our society may- G& T1 v2 `. l+ u' I! z
indeed cause more virilization in male or female5 s% j! U0 {3 F5 |0 i% ?
children than one would realize. Exposure to andro-# f. e+ c+ d5 B
gen products must be considered and specific ques-
. C6 c( P1 [+ J: Gtioning about the use of a testosterone product or6 O' h' @ s/ s j3 T+ D- G
gel should be asked of the family members during
# r$ f! }+ i5 I; T3 P" b8 lthe evaluation of any children who present with vir-2 o E, Q9 u* G
ilization or peripheral precocious puberty. The diag-
: X, q* [$ [8 U6 x: Gnosis can be established by just a few tests and by
( N5 t1 C5 J# \+ }9 Dappropriate history. The inability to obtain such a
# d0 R x7 M0 [! p/ d5 Z6 Bhistory, or failure to ask the specific questions, may
# T7 E+ l% @( vresult in extensive, unnecessary, and expensive7 m' l k/ C- Y, F
investigation. The primary care physician should be
" W* n8 `/ y9 o, H1 ^' l6 ]aware of this fact, because most of these children1 `6 U K6 P' i" A6 l! W. _
may initially present in their practice. The Physicians’
+ X1 I! a2 A! N C; wDesk Reference and package insert should also put a
$ H0 d! M, G$ j- ~+ Dwarning about the virilizing effect on a male or
6 @9 F( Q: D. T9 D4 s' ffemale child who might come in contact with some- [! Y* F! S3 h( [
one using any of these products.( l0 r+ X6 N( b. {1 ^1 B3 c
References1 \8 F9 D- y5 `4 k7 D2 a
1. Styne DM. The testes: disorder of sexual differentiation" x$ q+ @! p" H5 z Q3 s
and puberty in the male. In: Sperling MA, ed. Pediatric
5 Z/ o; Q$ O# C# Z4 w, nEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
" \8 ^( [- I' Z/ a Q2002: 565-628.
& R; [4 W0 w9 c4 C' i- I6 L2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious/ Y/ w9 T; P7 H8 [1 b
puberty in children with tumours of the suprasellar pineal; w9 k, P* x) ~: ]+ B+ u
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Topical Testosterone Exposure / Bhowmick et al 543
2 T S) ^3 O0 H- J# }) t7 n! k0 c0 y* Tareas: organic central precocious puberty. Acta Paediatr.* B2 j- c: F1 _9 r6 T( ~& ^
2001;90:751-756.. {* {5 _6 o! B: n7 K+ o
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed. B; a2 z: K% r8 e3 f& v
Pediatric Endocrinology. 4th ed. New York, NY: Marcel$ C1 b+ p; l ?$ C
Dekker Inc; 2003:211-238.
\, Q/ x. Y2 J0 O3 M* t3 ^4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
3 A* T( ]. B( |* ?development in a two-year-old boy induced by topical, w- `2 n9 R( B
exposure to testosterone. Pediatrics. 1999;104:e23.3 e# e) c' K8 v$ ?7 P; I7 \
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
* ]- N5 y4 N1 J9 H- xSkeletal Development of the Hand and Wrist. 2nd ed.
$ I3 L; G, a; _# tStanford, CA: Stanford University Press; 1959.
5 r2 x% B" w9 s* v* n9 Y6. Physicians’ Desk Reference. Androgel 1% testosterone,' S: q& v/ W6 x5 `) j# e! D
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
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