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is a significant concern for physicians. Central/ a) ?+ j7 Y# G" r' j
precocious puberty (CPP), which is mediated V+ J% h/ w3 f" x1 p* x% E7 S2 U
through the hypothalamic pituitary gonadal axis, has
' G: `5 B$ \& D0 }! U% ca higher incidence of organic central nervous system
+ v3 v0 |( a+ o1 h/ Ylesions in boys.1,2 Virilization in boys, as manifested
1 x X- H, ^2 `: f/ F3 eby enlargement of the penis, development of pubic
; ~% C2 L) b, i* {, rhair, and facial acne without enlargement of testi-
, T7 @3 b/ k9 C& X& kcles, suggests peripheral or pseudopuberty.1-3 We# s& r0 ]5 C( @! _" S# I0 v) d
report a 16-month-old boy who presented with the
# C/ E% v" w) s, xenlargement of the phallus and pubic hair develop-
5 h8 a. c n, Mment without testicular enlargement, which was due! q0 a Y0 X2 c0 |2 k
to the unintentional exposure to androgen gel used by
: A4 \3 `1 h5 v$ A0 Y Z( lthe father. The family initially concealed this infor-9 T& _! n) P# C, O$ ]
mation, resulting in an extensive work-up for this' C1 b% P* ^! G! D$ Y% p
child. Given the widespread and easy availability of
6 D' _1 N& ?* l" z# e) @testosterone gel and cream, we believe this is proba-
; Q( K0 i- w3 e# v: ]bly more common than the rare case report in the
2 v; f! z1 O* `- ~literature.4
* \. ~5 k# Q9 P2 Y: `Patient Report
% {% Z8 f# O2 K# E3 o8 m! w- I# iA 16-month-old white child was referred to the
) A3 m) i4 T/ \( uendocrine clinic by his pediatrician with the concern* D% F! e/ ]4 d7 h/ q" h
of early sexual development. His mother noticed
8 z2 Z" k$ x0 I( e2 Clight colored pubic hair development when he was4 Y$ G% k# n2 t) \
From the 1Division of Pediatric Endocrinology, 2University of; G* [+ x* S% |3 A4 B: m& O( g, _6 `% c
South Alabama Medical Center, Mobile, Alabama.
+ [9 m4 g0 u* e- v6 `Address correspondence to: Samar K. Bhowmick, MD, FACE,$ x$ G' P; u# t5 \" G5 G
Professor of Pediatrics, University of South Alabama, College of
9 w2 t5 k5 m8 i' |7 O1 w5 c7 b& uMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;$ \# A6 g6 @' e& L# d2 j3 Q5 Z$ w
e-mail: [email protected]. l7 o: y; X& G! ?4 R8 n
about 6 to 7 months old, which progressively became
/ [ |, Y8 x3 I# k" t! v* [darker. She was also concerned about the enlarge-* I/ m, J( F: L) i& t" U
ment of his penis and frequent erections. The child+ E9 f$ U: V3 g8 V& P8 y
was the product of a full-term normal delivery, with5 i) F( z/ P2 O
a birth weight of 7 lb 14 oz, and birth length of
" a( k- {. ^1 _4 \1 H20 inches. He was breast-fed throughout the first year) K; b" u. j4 z1 q0 i+ u- S
of life and was still receiving breast milk along with) a7 H0 u; }* y9 P1 ~8 e
solid food. He had no hospitalizations or surgery,
8 A( F* R) Q) C: o! J* R* o- Zand his psychosocial and psychomotor development
! ~* c7 e. O. [3 H9 c- ~ X6 Mwas age appropriate.. v& v6 Y8 \0 I+ \) ?
The family history was remarkable for the father,7 i9 S4 J, ]8 X* z( j9 q
who was diagnosed with hypothyroidism at age 16,
' g9 m W' `( }# b( Nwhich was treated with thyroxine. The father’s
4 F# e2 `* Z. @1 theight was 6 feet, and he went through a somewhat' P: K& l# T3 _7 `
early puberty and had stopped growing by age 14.
* U2 {( w7 M1 j; @/ lThe father denied taking any other medication. The
* Q" x6 C w nchild’s mother was in good health. Her menarche
3 J, X0 h6 _: Y+ A; `was at 11 years of age, and her height was at 5 feet4 E$ q& k8 A6 R/ W) E
5 inches. There was no other family history of pre-
/ o- c8 `1 \7 Y" Z; R8 o3 k6 ?! mcocious sexual development in the first-degree rela-
S! C, |: G# e/ `tives. There were no siblings.; J7 y$ e& Y1 n4 J
Physical Examination
; {, D7 d3 r" kThe physical examination revealed a very active,
4 f* ^6 \8 N$ n% D H ~9 xplayful, and healthy boy. The vital signs documented6 ~- n& F1 u- Q3 T0 V. z
a blood pressure of 85/50 mm Hg, his length was' ~3 L+ _4 w, f
90 cm (>97th percentile), and his weight was 14.4 kg' l5 W# e0 E8 C( V& h# j
(also >97th percentile). The observed yearly growth: H+ e6 u. I0 O) d- }' r
velocity was 30 cm (12 inches). The examination of
+ [6 k& L# U9 y$ R" Pthe neck revealed no thyroid enlargement.' w- u$ i0 R# s# f( }, `5 B
The genitourinary examination was remarkable for
$ j, {8 x; C0 Eenlargement of the penis, with a stretched length of8 V! M9 v r* R: p
8 cm and a width of 2 cm. The glans penis was very well
4 `. {+ S- w, {) O* e5 v S. Bdeveloped. The pubic hair was Tanner II, mostly around/ y. y# H# ?/ B( }/ j+ j
540/ d9 K* B0 N4 j- Z3 J9 n
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 \, [7 H+ j5 v8 f5 g! U9 ?
the base of the phallus and was dark and curled. The
+ ~+ M$ [, }, x7 @/ M0 B( Xtesticular volume was prepubertal at 2 mL each.: k4 v( e% V. b; |& B7 d
The skin was moist and smooth and somewhat
, R* e6 E7 D1 {oily. No axillary hair was noted. There were no, |8 q& k6 y9 e. ]
abnormal skin pigmentations or café-au-lait spots.# Z, Y! X, h- o% ?! H C, p5 w- k1 B
Neurologic evaluation showed deep tendon reflex 2+
& ^1 J# n3 d, G" F: o% X7 k! d A) _% i$ Abilateral and symmetrical. There was no suggestion
" H2 m* d* M7 @$ ?7 D: X _0 Gof papilledema.3 b+ ^9 c! j) N' J7 f7 N: D
Laboratory Evaluation
5 R% ~3 ?6 V7 N0 l6 \The bone age was consistent with 28 months by" V9 {% K* W: M3 d& w- A& F: d r
using the standard of Greulich and Pyle at a chrono-
6 N6 ?5 R0 x: Ologic age of 16 months (advanced).5 Chromosomal
& Y8 `' T4 B& ?1 ?/ ikaryotype was 46XY. The thyroid function test
3 K2 V9 h/ Z1 e' l! |0 S6 T/ zshowed a free T4 of 1.69 ng/dL, and thyroid stimu-5 |$ [- a5 l5 s2 M% c
lating hormone level was 1.3 µIU/mL (both normal).
0 N" }7 E. [# f/ B, QThe concentrations of serum electrolytes, blood
3 O0 w, q8 x7 S) U ^urea nitrogen, creatinine, and calcium all were4 I) J" n% \0 K: R+ k" k' G; L
within normal range for his age. The concentration. \$ z0 k: z1 g; I3 o, B4 U V b
of serum 17-hydroxyprogesterone was 16 ng/dL# a0 G& J; G& W; Z8 }' T# i
(normal, 3 to 90 ng/dL), androstenedione was 209 y9 [- W( P( k
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
) I" u0 t7 @" k/ o0 G2 F: f% m4 eterone was 38 ng/dL (normal, 50 to 760 ng/dL),/ u" f$ N9 B1 v% Z1 ?4 K7 n
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
9 C! D9 Q) i l49ng/dL), 11-desoxycortisol (specific compound S)( z' |- I/ ^& D6 }
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-8 H2 {8 q4 o) X0 H
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total4 O2 t( l5 t2 N+ A
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),' }9 H* q5 @, R
and β-human chorionic gonadotropin was less than
( v) Q7 m8 v! B a; O( s4 Y* L5 mIU/mL (normal <5 mIU/mL). Serum follicular
' G3 y, s9 L* Y" H) j4 A0 b' p5 z' {stimulating hormone and leuteinizing hormone+ a J6 b! @9 \+ V( z
concentrations were less than 0.05 mIU/mL$ \% ^# w/ E; j( E: W' X! H* g* Q
(prepubertal).5 |3 Z% a8 k' N! T$ K
The parents were notified about the laboratory
9 {# T. O+ g4 o( qresults and were informed that all of the tests were
. I- H9 ?. Z6 X: ]8 n8 r+ Anormal except the testosterone level was high. The3 b% L3 ], S5 l' H
follow-up visit was arranged within a few weeks to" S% K7 J3 o& B, c* {4 p
obtain testicular and abdominal sonograms; how-
% h# x5 _5 x" | h9 n2 Zever, the family did not return for 4 months.8 J/ v" I% Q$ |! M7 k
Physical examination at this time revealed that the
8 E* Y: W& r) dchild had grown 2.5 cm in 4 months and had gained7 J5 e6 I( e8 m5 m+ x
2 kg of weight. Physical examination remained$ P: l5 O# k7 f4 k/ A! V
unchanged. Surprisingly, the pubic hair almost com-/ z, M2 m- @6 q1 j, j0 Q# \
pletely disappeared except for a few vellous hairs at, k+ ~5 d d# i$ t! ~( b9 b* e( G
the base of the phallus. Testicular volume was still 2
' G( t/ m' P' {1 ~" XmL, and the size of the penis remained unchanged." A9 J: Q* ]: V4 K H# Q
The mother also said that the boy was no longer hav-4 [( \+ l5 r7 w+ c5 }+ B; T
ing frequent erections.
1 c# [/ q6 f9 l7 A/ KBoth parents were again questioned about use of
0 P4 l1 }6 P: P: vany ointment/creams that they may have applied to
5 [& d, K) \! Ethe child’s skin. This time the father admitted the
% O( h( s# @% i/ TTopical Testosterone Exposure / Bhowmick et al 541
- H& |# y% X4 K) q* ?1 u+ _# R; Quse of testosterone gel twice daily that he was apply-
% @5 G, W" ~( Y7 T& `9 e% T5 x, Sing over his own shoulders, chest, and back area for! i( Y8 t% Q+ h, s5 G; m
a year. The father also revealed he was embarrassed
5 ` s9 r% s. @6 S c; _) l) Bto disclose that he was using a testosterone gel pre-
* Z: H8 M0 L: k+ N: vscribed by his family physician for decreased libido; h1 q# R# g" \
secondary to depression.- `* E" r* M5 X, k+ i; ?
The child slept in the same bed with parents.
4 M4 L. ?2 ?$ [$ f6 V* V dThe father would hug the baby and hold him on his$ h4 o* a- P L! V
chest for a considerable period of time, causing sig-/ I/ V* R9 U- k$ m- U' d
nificant bare skin contact between baby and father.
3 f Y/ O2 S" |, OThe father also admitted that after the phone call,8 f$ S3 O: O5 [9 ]0 \/ N \
when he learned the testosterone level in the baby
M* G# ?6 {7 e* ?5 t7 ?, Awas high, he then read the product information
8 C# F; L* F0 Q, t1 ipacket and concluded that it was most likely the rea-/ G0 Z) }$ W) ]: V4 i
son for the child’s virilization. At that time, they
5 {3 s* O3 M/ r; Ydecided to put the baby in a separate bed, and the: v3 D. t, v2 e; U
father was not hugging him with bare skin and had' f( A: v7 K7 Y! T- _: [
been using protective clothing. A repeat testosterone
# \5 e3 Z# l. G4 {* ?test was ordered, but the family did not go to the) f! U2 A9 m2 ^- T9 G
laboratory to obtain the test.
r1 T* m: `$ D$ j9 k/ {Discussion
* Y8 B3 ?' k7 U n+ S5 I7 CPrecocious puberty in boys is defined as secondary( u8 w5 t; {4 a1 t( G* t% Q" U8 A$ ~! Q2 p) [
sexual development before 9 years of age.1,4( Q9 H" V4 ?: `( t8 [' G( j+ O5 i- [
Precocious puberty is termed as central (true) when
3 u! N3 v6 s e* L# qit is caused by the premature activation of hypo-+ T% Y' a/ u1 m9 T6 e; `% w
thalamic pituitary gonadal axis. CPP is more com-
$ R& I7 Y! {4 k& c, w2 l2 m* P" gmon in girls than in boys.1,3 Most boys with CPP
; A ?, N( r! dmay have a central nervous system lesion that is
& ~2 `4 A. C$ tresponsible for the early activation of the hypothal-
( A- X0 w9 E' a. O8 Qamic pituitary gonadal axis.1-3 Thus, greater empha-; g. u! h7 N2 b7 b, d, }
sis has been given to neuroradiologic imaging in& Y! J0 ~' i5 |7 f& O. ~& y0 t+ q
boys with precocious puberty. In addition to viril-
8 {. f% b' G& k' Hization, the clinical hallmark of CPP is the symmet-
: K: a3 B* S6 r# vrical testicular growth secondary to stimulation by
/ l; I. `$ b: n/ @8 A" c4 |6 }# @& A7 ygonadotropins.1,3. M/ Z s( s6 D: z1 d& ?+ _
Gonadotropin-independent peripheral preco-
1 Q8 U* g3 p3 k) o- b. bcious puberty in boys also results from inappropriate' d1 z. [$ U p; S3 S8 m/ h' a
androgenic stimulation from either endogenous or) I- K* I3 Y5 y3 M3 z0 g: z( v/ b
exogenous sources, nonpituitary gonadotropin stim-
1 H7 q/ ~# k9 x( {2 Kulation, and rare activating mutations.3 Virilizing
+ e9 ?+ K# x$ e5 H6 l2 V' }% Xcongenital adrenal hyperplasia producing excessive+ x K u8 ^& M' `# N
adrenal androgens is a common cause of precocious
; v" f+ J# l$ D5 Opuberty in boys.3,4
6 Z# ?# G% @8 u1 V7 [) h) GThe most common form of congenital adrenal
" B5 K5 O2 k* n% P8 ~1 w/ @hyperplasia is the 21-hydroxylase enzyme deficiency.8 X- p- n3 F6 m3 ^
The 11-β hydroxylase deficiency may also result in
% f7 B. W! x I5 Aexcessive adrenal androgen production, and rarely,4 r/ K$ x7 l* r
an adrenal tumor may also cause adrenal androgen
! J$ _0 E/ A Q: P, Lexcess.1,3* S0 r; w9 \; E+ h9 P4 M
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* X+ C4 F9 U8 [7 b542 Clinical Pediatrics / Vol. 46, No. 6, July 2007; x" F. o; W8 X3 }% B, F; d$ p
A unique entity of male-limited gonadotropin-' }0 V) l3 P( d: S$ o9 W
independent precocious puberty, which is also known6 x5 ~" b- }- f: T' Y9 N) a
as testotoxicosis, may cause precocious puberty at a- |* }. `3 z6 R, K) r f
very young age. The physical findings in these boys Q; c% V& m/ x+ d5 O/ E
with this disorder are full pubertal development,2 {7 E1 r1 t" \0 x- @; F
including bilateral testicular growth, similar to boys
: x: d. o2 ^# c' o6 k: uwith CPP. The gonadotropin levels in this disorder
& s3 }3 ^7 `+ U8 m9 E" n5 y9 d) `are suppressed to prepubertal levels and do not show% a6 W, ?" u( y7 f
pubertal response of gonadotropin after gonadotropin-+ R2 L( {7 S! j: x* S5 a. N
releasing hormone stimulation. This is a sex-linked
. y( k+ o5 V4 G" R" m- B" g$ ~autosomal dominant disorder that affects only
4 y8 m: W# b5 z$ L- T0 ~males; therefore, other male members of the family1 U& C" n! l$ u, `# V* t% z7 n
may have similar precocious puberty.33 G1 C" E+ m1 f
In our patient, physical examination was incon-, @' Q( K5 A0 B U* l: a. L
sistent with true precocious puberty since his testi-" [7 m. B9 ~$ D8 `4 O/ X4 [/ [
cles were prepubertal in size. However, testotoxicosis; d% z ?/ v1 C6 e
was in the differential diagnosis because his father
- e' N/ L$ u+ B) @started puberty somewhat early, and occasionally,
/ ~1 n Z$ _% d* d7 Y- Utesticular enlargement is not that evident in the
; ^+ ?# |: w# `% a: P; D9 N' t5 ^beginning of this process.1 In the absence of a neg-
8 u0 k& e: t9 ^1 L3 _ n: @ative initial history of androgen exposure, our
R. I* Z9 ~' a3 }0 ?% {biggest concern was virilizing adrenal hyperplasia,5 A( c# S- u* U9 V# l2 c* k
either 21-hydroxylase deficiency or 11-β hydroxylase% l+ ], _ j. `
deficiency. Those diagnoses were excluded by find-6 r& e: E7 R1 C0 q+ o3 K, L; B1 R+ [
ing the normal level of adrenal steroids.
% k. a/ g8 v) |( N& H3 y0 TThe diagnosis of exogenous androgens was strongly
- \/ J0 P1 J" v+ }suspected in a follow-up visit after 4 months because; q- v1 N, L1 `; D7 U
the physical examination revealed the complete disap-, \# J+ X+ R, n* v" l
pearance of pubic hair, normal growth velocity, and
2 d; W/ Q9 q2 l3 D; N! Sdecreased erections. The father admitted using a testos-
/ v/ c: y& Y. \! k' x) V) @3 Zterone gel, which he concealed at first visit. He was
1 Q7 F. ] p: K9 `' A! P" z$ T, Yusing it rather frequently, twice a day. The Physicians’& c9 \: ?& \" |3 A; h
Desk Reference, or package insert of this product, gel or
5 |( I, y- _( N i9 h$ ? i5 Xcream, cautions about dermal testosterone transfer to4 x* w5 N2 ?! H W% p+ b+ e* _% d
unprotected females through direct skin exposure.
; m/ u: ~7 S7 g4 s" ]' M8 TSerum testosterone level was found to be 2 times the2 l% J( m. Q9 f) V
baseline value in those females who were exposed to
# ]* W$ K) b4 y, _& Veven 15 minutes of direct skin contact with their male
# A+ O6 Q+ G& i1 Zpartners.6 However, when a shirt covered the applica-0 V: Z; A5 {* [& c. K3 G
tion site, this testosterone transfer was prevented." n0 r; f I# K/ F: T9 E S
Our patient’s testosterone level was 60 ng/mL,
: l( O' P% ?6 J" M, g7 Ewhich was clearly high. Some studies suggest that
3 w! P; ^7 ^* t5 B( Y; {dermal conversion of testosterone to dihydrotestos-& `) y3 [& ]7 P0 ~+ U! ]& P5 M8 l
terone, which is a more potent metabolite, is more2 X b7 J+ G* B2 O
active in young children exposed to testosterone1 l+ E( p9 Z/ X; R
exogenously7; however, we did not measure a dihy-
; b% L+ {/ _: ^& Fdrotestosterone level in our patient. In addition to) z6 P1 g$ u/ }
virilization, exposure to exogenous testosterone in1 s; ^/ u' T+ R* L
children results in an increase in growth velocity and
* T( I1 U4 L2 C2 Q9 d6 E5 \+ j# ?/ ^advanced bone age, as seen in our patient." d( ]" p& C4 M/ [" Z+ C
The long-term effect of androgen exposure during
* Z- y# \7 W# B1 zearly childhood on pubertal development and final. d' G' R _2 D1 I" I
adult height are not fully known and always remain- K+ e& c; H1 M" b
a concern. Children treated with short-term testos-- x& H+ L7 n+ M( @
terone injection or topical androgen may exhibit some6 ?1 X4 U5 q3 \0 \& |" |
acceleration of the skeletal maturation; however, after' x( U' a; @$ q1 R3 k
cessation of treatment, the rate of bone maturation6 |6 S! l, g& F" x
decelerates and gradually returns to normal.8,9, I5 z: K6 s2 m! p
There are conflicting reports and controversy
+ D+ m* a4 m4 z: Zover the effect of early androgen exposure on adult4 `, t) j" g$ X9 I2 _/ D8 d+ c" p* I
penile length.10,11 Some reports suggest subnormal5 L3 ^% O1 ]& J
adult penile length, apparently because of downreg-
* F: l6 {8 r; E9 G0 Z5 Z+ F rulation of androgen receptor number.10,12 However,+ U7 \0 |( n9 a7 k5 x$ s, U
Sutherland et al13 did not find a correlation between# J2 v3 Q' a, q& m+ t2 a8 P
childhood testosterone exposure and reduced adult
: ?1 Y* x; v) \8 R( F& b' ~penile length in clinical studies.
) R& S% Q) p# K: d) tNonetheless, we do not believe our patient is
' R. t: m1 I8 W& c5 Igoing to experience any of the untoward effects from% @- W8 a# R1 f( w
testosterone exposure as mentioned earlier because4 K- n7 u' y& h% v+ C# l) b
the exposure was not for a prolonged period of time.6 P. v' t* Z) w/ k7 l
Although the bone age was advanced at the time of
6 c+ t6 J: L+ N1 {2 V! Zdiagnosis, the child had a normal growth velocity at
( o8 _: u. h( W; |3 Bthe follow-up visit. It is hoped that his final adult1 s0 p3 r5 r3 p0 _/ {- z5 B) `
height will not be affected.
% m; N' V* z5 _/ hAlthough rarely reported, the widespread avail-
( s5 q4 H3 E; g; v& Jability of androgen products in our society may$ ]& C8 x: M7 r3 m& F
indeed cause more virilization in male or female" `& t9 f' _# U q0 H
children than one would realize. Exposure to andro-0 ` R% \3 A/ x6 [, x5 y
gen products must be considered and specific ques-+ c% p5 F3 F2 I+ s' y" G- ]
tioning about the use of a testosterone product or" o6 N7 w9 M1 G* b$ G/ ?9 R" b# ~. P
gel should be asked of the family members during8 l1 j) M( j/ q' J. q
the evaluation of any children who present with vir-
8 H) K9 N( K4 R: h. Vilization or peripheral precocious puberty. The diag-) E! J5 I, X) l* P
nosis can be established by just a few tests and by3 c1 E% z8 g" h; F5 Y
appropriate history. The inability to obtain such a
5 J8 J6 v4 [* c/ c. Thistory, or failure to ask the specific questions, may4 Q" A( }! | f f
result in extensive, unnecessary, and expensive; C! R% l# p/ s4 ]7 V- k
investigation. The primary care physician should be, h5 l' T- v0 B% M6 S
aware of this fact, because most of these children# |" K0 V4 l# Y3 Y
may initially present in their practice. The Physicians’1 c' f. `* i8 V# h1 L2 y! i
Desk Reference and package insert should also put a. m% Q/ z& S( m1 q3 n. [% H3 v7 x# m
warning about the virilizing effect on a male or' Y6 }& R( V0 c$ ~
female child who might come in contact with some-
) h" c- H4 \9 V# s# xone using any of these products.
0 C( O! Q$ d4 [) V7 n+ W' r/ p" }References
; j: T; h4 [+ k u+ Z$ N1. Styne DM. The testes: disorder of sexual differentiation
7 R; i6 v# l9 L2 z" G, w1 X) sand puberty in the male. In: Sperling MA, ed. Pediatric, C k) H T+ R) Z" R; Y
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
1 Y( i- _. b0 ?! h+ C2002: 565-628.2 I' X0 a9 P5 `# R
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious& A( t% r3 g, m5 e: B8 B2 O. n6 d
puberty in children with tumours of the suprasellar pineal6 A, _* |, ^. `& J4 I
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3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.. ]( ~5 W) S* G+ ]3 ^+ B1 T: o5 z
Pediatric Endocrinology. 4th ed. New York, NY: Marcel; s, x/ a; { m9 Q8 F
Dekker Inc; 2003:211-238.( s# ]9 j& l' r5 Q. s( r) b
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual0 k* }- i# I8 o! d- G1 F/ d( L
development in a two-year-old boy induced by topical
! J- E4 x7 p& {5 V. c* |exposure to testosterone. Pediatrics. 1999;104:e23.* i/ ^9 T% P, X) W0 ]* u
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
9 G2 R( i v$ {% ^1 @4 ?: PSkeletal Development of the Hand and Wrist. 2nd ed.; x+ Z( \2 S$ Q4 ]' J! n5 ]- S- R
Stanford, CA: Stanford University Press; 1959.) w+ a4 S! H' W
6. Physicians’ Desk Reference. Androgel 1% testosterone,/ X6 s; X0 i! q
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
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