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is a significant concern for physicians. Central
s' n8 l/ U! Z$ d1 |3 e0 Hprecocious puberty (CPP), which is mediated% s8 F# X+ @1 R- {- ]+ i" \
through the hypothalamic pituitary gonadal axis, has: F! e( a* ]8 |( a7 s% J7 s
a higher incidence of organic central nervous system
$ w. x; V- |) a. F+ K9 wlesions in boys.1,2 Virilization in boys, as manifested+ R# x: B% @: l4 R+ y
by enlargement of the penis, development of pubic4 s; ?9 m% Z! i
hair, and facial acne without enlargement of testi-
" D* I2 }8 S8 ycles, suggests peripheral or pseudopuberty.1-3 We
' I& H$ j6 e7 ereport a 16-month-old boy who presented with the, t S0 M: t; w3 l. ~6 [4 d
enlargement of the phallus and pubic hair develop-
5 D6 _9 l- e. J, O( E: U+ Ement without testicular enlargement, which was due; G# ?% D) [; r2 J+ f
to the unintentional exposure to androgen gel used by: l e( K& u* U. O
the father. The family initially concealed this infor-1 I# g3 X! S, y$ C1 @# D4 W5 K
mation, resulting in an extensive work-up for this
) Y- v# p. Y& Z w3 Cchild. Given the widespread and easy availability of/ D! V3 [' C2 h8 D# L
testosterone gel and cream, we believe this is proba-1 u7 u1 x: l* h% p# v$ w( _; p( _+ q
bly more common than the rare case report in the+ W/ u6 U; {. e4 k5 ?4 H5 X
literature.4) j* ?) z1 G7 i+ F7 i" U7 ]) c
Patient Report
/ ~8 T4 c D- }A 16-month-old white child was referred to the9 V' M8 x7 @( W: D
endocrine clinic by his pediatrician with the concern; I2 A9 j% p5 a0 R$ b. B/ O' q
of early sexual development. His mother noticed
, A& k& \* d# Y' Z0 ~# dlight colored pubic hair development when he was7 d( V* G/ R: X8 C& H$ A" f
From the 1Division of Pediatric Endocrinology, 2University of
! F3 O+ r: w. T- Y% @) ] l! FSouth Alabama Medical Center, Mobile, Alabama.1 E' Z! N* z6 R' H
Address correspondence to: Samar K. Bhowmick, MD, FACE,! f; V4 j# c+ k$ u& l; X5 ]: c. M; P
Professor of Pediatrics, University of South Alabama, College of" j1 w4 E6 I& U9 t! ]" u% [
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
/ x" S9 A; B6 f. j& b5 _e-mail: [email protected].
I% |. N4 Z( ~about 6 to 7 months old, which progressively became3 z2 Y2 H& Q3 V
darker. She was also concerned about the enlarge-
, [' o W! [. P- Kment of his penis and frequent erections. The child
5 C" F$ S! h4 Q p1 i- owas the product of a full-term normal delivery, with% I1 p* V9 K) k! f) Z$ @. D
a birth weight of 7 lb 14 oz, and birth length of1 g7 f6 ]& S; y
20 inches. He was breast-fed throughout the first year
* p9 Z5 e5 V" S4 tof life and was still receiving breast milk along with1 V' R; m# }+ u- j d! `( p7 X8 y' N
solid food. He had no hospitalizations or surgery,5 [# @. F3 c6 F' S% T
and his psychosocial and psychomotor development
; N5 q5 Q+ e3 Qwas age appropriate.- D, Z/ Q$ K, ~
The family history was remarkable for the father,: y% `, |# B$ y. g1 h! u9 Z& J t" c8 ~
who was diagnosed with hypothyroidism at age 16,
( N! o) l& a4 W9 Dwhich was treated with thyroxine. The father’s7 a$ E; E6 i j
height was 6 feet, and he went through a somewhat' X# ~0 Q5 H1 G3 g) x2 ]
early puberty and had stopped growing by age 14.
2 @/ {6 E0 g, g. l& ^* PThe father denied taking any other medication. The" B( q$ V/ W' j+ g( \
child’s mother was in good health. Her menarche
: O1 j; J' Z' a0 gwas at 11 years of age, and her height was at 5 feet
5 `& y8 K; m2 _9 u- J2 C5 inches. There was no other family history of pre-
w" G' r5 h c7 c: o+ Qcocious sexual development in the first-degree rela-
. O3 Y: I% J @; qtives. There were no siblings.+ H* p1 j7 i5 L6 W F4 X
Physical Examination. ^8 a" t. F l9 H) z" E
The physical examination revealed a very active,
. N+ M" p3 C8 p2 g7 C. Splayful, and healthy boy. The vital signs documented" U# o% z6 _4 O: t2 k
a blood pressure of 85/50 mm Hg, his length was
3 H$ L+ \$ f9 {! B- t3 F90 cm (>97th percentile), and his weight was 14.4 kg! I" F1 r6 @$ `' A, `
(also >97th percentile). The observed yearly growth& ~2 S7 E2 V: _6 p5 A1 k
velocity was 30 cm (12 inches). The examination of. n8 `. I) h9 X0 }* ~* H, Q
the neck revealed no thyroid enlargement.2 E' G- M/ _! J0 a6 N& m4 D
The genitourinary examination was remarkable for c+ g1 W- l+ b
enlargement of the penis, with a stretched length of. u7 c5 |" B1 i k7 v* V
8 cm and a width of 2 cm. The glans penis was very well
- n+ E2 }) k! P+ i2 rdeveloped. The pubic hair was Tanner II, mostly around
- {3 f5 V2 O# |4 ~( t540
. h4 B8 h7 d7 p5 W4 q! ^) Iat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from+ P5 `5 h6 R2 d, m4 F E
the base of the phallus and was dark and curled. The
1 H) e" A) ]5 v- z2 U- R2 H: @5 ~0 mtesticular volume was prepubertal at 2 mL each.
* [4 ~$ V9 j+ _The skin was moist and smooth and somewhat
; q( M. r4 Y1 c4 U" Q$ soily. No axillary hair was noted. There were no
. d4 A: C# h/ a0 w1 {abnormal skin pigmentations or café-au-lait spots.
a! e9 n& |- }1 ?' i9 o0 lNeurologic evaluation showed deep tendon reflex 2++ ]9 Q5 c1 j, @$ I! ~
bilateral and symmetrical. There was no suggestion
9 a7 o4 W( y8 l/ Oof papilledema.3 U, _6 g0 w; h' A
Laboratory Evaluation9 T: C9 v3 ~) L# J& q- e
The bone age was consistent with 28 months by
& O' ]0 P+ Q2 n& `using the standard of Greulich and Pyle at a chrono-
" M, u1 A& J( f, A' e7 qlogic age of 16 months (advanced).5 Chromosomal# H" D+ c4 T5 p* k2 _+ A( Y
karyotype was 46XY. The thyroid function test
0 q- n. c# o+ {. e) }0 `4 }" J* vshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
% h& E9 H. u. i3 n% K% m8 P9 vlating hormone level was 1.3 µIU/mL (both normal).) T R, J5 m, c) ]
The concentrations of serum electrolytes, blood
" X5 S0 T; L5 q3 n, c2 @urea nitrogen, creatinine, and calcium all were
5 ~1 m0 {2 s. ~within normal range for his age. The concentration
7 |0 c* ] z% W* A9 M7 fof serum 17-hydroxyprogesterone was 16 ng/dL
0 l% s6 t D* c, R& p, G(normal, 3 to 90 ng/dL), androstenedione was 208 m- k. }$ f6 @( [3 [# J
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-' o' y1 ^0 z( l( P6 J( u
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
% W. {. W: s3 O9 v" udesoxycorticosterone was 4.3 ng/dL (normal, 7 to
& i; ?) J& l! D) D' M49ng/dL), 11-desoxycortisol (specific compound S)
6 x0 Z! ~ ^& i- n g8 owas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
" ^% L1 a( {8 Htisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total0 m: Y& a8 C k8 n0 C+ d) I' c& s
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),( k8 m& p6 Z+ ]5 e+ C- Y
and β-human chorionic gonadotropin was less than
4 }" w: k$ q3 p# s9 G5 mIU/mL (normal <5 mIU/mL). Serum follicular0 u8 X m" m6 i9 ~1 b& @ n3 y
stimulating hormone and leuteinizing hormone$ [) q K: w) v7 `3 h3 E( e: n
concentrations were less than 0.05 mIU/mL
# q" {8 \* @ B" G1 N; ~(prepubertal).
$ A8 ]) F$ G& ], @ [( TThe parents were notified about the laboratory
: t: d- C* D! o# m" g% tresults and were informed that all of the tests were
5 k8 u/ m( X9 V9 Z$ Dnormal except the testosterone level was high. The" C( k$ @$ f; m+ j! e6 W7 Q3 p( |
follow-up visit was arranged within a few weeks to
) c( [6 |; S. w! c- p$ Cobtain testicular and abdominal sonograms; how-
% J. a! V7 q# n1 sever, the family did not return for 4 months.6 C" C8 x* B" `1 n* {7 i
Physical examination at this time revealed that the
7 D" H0 y, ` i7 k9 \child had grown 2.5 cm in 4 months and had gained6 X9 a9 M$ a; C+ y+ K. g# v5 I
2 kg of weight. Physical examination remained
9 _! j$ m* k, h# V, `unchanged. Surprisingly, the pubic hair almost com-
c, S2 o9 `" d+ r% V3 u5 Rpletely disappeared except for a few vellous hairs at: c: d2 Q; J$ e5 l: R
the base of the phallus. Testicular volume was still 2* B( Z! g: S r0 V. d4 W5 k
mL, and the size of the penis remained unchanged.
7 ?+ S) l; p3 S8 ^) N0 CThe mother also said that the boy was no longer hav-9 E* X( F7 _, l( G5 T. n6 G7 Y! Z
ing frequent erections.
+ y; W) D% v- g/ u* _Both parents were again questioned about use of
1 n& d) U0 p" n+ @8 Q" y& J O! {3 D1 dany ointment/creams that they may have applied to
1 [( g+ @' S: O- o9 \7 gthe child’s skin. This time the father admitted the
o: p1 m* x4 g$ n7 g1 BTopical Testosterone Exposure / Bhowmick et al 541
$ j2 D6 Z z* p/ |7 ^! _8 Kuse of testosterone gel twice daily that he was apply-" v/ e Y+ P) P3 F7 d
ing over his own shoulders, chest, and back area for# W( O9 [& T' }( |$ Y
a year. The father also revealed he was embarrassed, a5 B0 i) J# e- `# |
to disclose that he was using a testosterone gel pre-- Y% P( ~5 a) r
scribed by his family physician for decreased libido8 g0 T; m, [$ g/ I0 g
secondary to depression.( | v& \* P/ ? }$ c q- i( s
The child slept in the same bed with parents.+ ` A% `* H* L
The father would hug the baby and hold him on his, P8 [) P! n) e
chest for a considerable period of time, causing sig-
% I+ D* S: @$ B1 E3 ]" gnificant bare skin contact between baby and father.
* B/ o, Y! ^* X7 I8 M. LThe father also admitted that after the phone call,
# e# @, B' W4 M; Swhen he learned the testosterone level in the baby8 ~0 @: I9 n! [+ [) ^# F8 y3 B
was high, he then read the product information
( y3 m1 O; y9 u5 Ypacket and concluded that it was most likely the rea-
% }4 e6 p6 }! t7 Y; v% D5 Q! Ason for the child’s virilization. At that time, they4 ?8 R5 Q: I4 [) Y+ e3 Z x/ f: R2 P& b/ ]
decided to put the baby in a separate bed, and the; w2 [8 `& y5 B) E! [8 R5 c
father was not hugging him with bare skin and had
0 M* T( d# ?8 Kbeen using protective clothing. A repeat testosterone
6 r; V4 A. Z9 ?' y; ~6 Mtest was ordered, but the family did not go to the# x! a, ^9 _- L3 X' p4 v
laboratory to obtain the test.
7 c6 u5 i: {& r9 @Discussion6 K+ e3 A7 d5 ?: F( f ?, e
Precocious puberty in boys is defined as secondary9 n, ?( b* Z' d+ e3 t( x) e; D
sexual development before 9 years of age.1,4
+ E* R. q6 p) K* nPrecocious puberty is termed as central (true) when
9 B5 l) H9 h6 v eit is caused by the premature activation of hypo-
' r5 m* n, e& K& A% Kthalamic pituitary gonadal axis. CPP is more com-
8 ?9 }$ e; `* d4 Z4 Nmon in girls than in boys.1,3 Most boys with CPP2 f( E, u# i3 A2 p, M' T' z
may have a central nervous system lesion that is
0 _/ _, \* b" Jresponsible for the early activation of the hypothal-
' C' f! }) T* u& n0 t0 ?6 m) J' uamic pituitary gonadal axis.1-3 Thus, greater empha-8 L2 K6 c# F' R, D
sis has been given to neuroradiologic imaging in$ b4 p+ }- J" X8 g
boys with precocious puberty. In addition to viril-& ^0 b2 X- @( j/ W8 z' D
ization, the clinical hallmark of CPP is the symmet-0 n( W9 m% [1 c$ \3 [2 p' P
rical testicular growth secondary to stimulation by, y( Q1 h; S: X. Z3 Q
gonadotropins.1,3' o4 H* M" R. n+ W) f$ }# N$ R
Gonadotropin-independent peripheral preco-
( `2 i: C6 v# N* V: c& i8 zcious puberty in boys also results from inappropriate
7 ?, v3 m! y# O( P B! m: y dandrogenic stimulation from either endogenous or
* b2 Q1 ]" T- L: aexogenous sources, nonpituitary gonadotropin stim-) Q( C5 i; b- L
ulation, and rare activating mutations.3 Virilizing
% p2 ~: O9 z: K) S& S$ Xcongenital adrenal hyperplasia producing excessive! t4 Y) [) M# b; L) v; O; `. \! e; X
adrenal androgens is a common cause of precocious
; r+ Q- W, ]1 t' t8 T; D1 f1 Fpuberty in boys.3,4! S, o% ~6 A, F3 _2 P
The most common form of congenital adrenal$ }: S/ d$ }: n& R8 B$ H
hyperplasia is the 21-hydroxylase enzyme deficiency./ y+ P! E9 k- O; t" @. g* e6 U) n
The 11-β hydroxylase deficiency may also result in
) d7 D) I& U3 M) q2 \, dexcessive adrenal androgen production, and rarely,+ S! j5 d6 b9 p9 Q6 @
an adrenal tumor may also cause adrenal androgen
9 w% V, `/ a% `4 }$ V/ B. dexcess.1,3
4 k. w9 j+ C$ a! C* Zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 X6 U1 R: _2 @ Q2 r542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
5 j$ Z a* ~! v# q- MA unique entity of male-limited gonadotropin-* ]- ~4 J4 @3 }3 s( x9 w# \
independent precocious puberty, which is also known
0 U" X6 J) n: F# ^as testotoxicosis, may cause precocious puberty at a
4 V. i5 o: m: D4 @very young age. The physical findings in these boys
) ^* a3 x3 ?( T! n4 g+ @with this disorder are full pubertal development,
- s0 c$ a6 M* m2 pincluding bilateral testicular growth, similar to boys
8 I+ n* }" t5 L+ e: S: _with CPP. The gonadotropin levels in this disorder
. M! H' ?; u( c8 P5 G, Mare suppressed to prepubertal levels and do not show4 r! ?! u4 a& i3 C# Q
pubertal response of gonadotropin after gonadotropin-
3 e6 N/ h! T }$ |releasing hormone stimulation. This is a sex-linked" {" T, E/ V( T; h6 N( V8 T; r3 L' S
autosomal dominant disorder that affects only
: c: ^6 \: y# g) n& | e! Zmales; therefore, other male members of the family
; z" h* h* |; A" V( _) d, M. gmay have similar precocious puberty.3& U5 X# j1 \1 P4 ]9 |/ y
In our patient, physical examination was incon-5 @/ }" K7 b: `: _0 c$ J. j, C
sistent with true precocious puberty since his testi-
7 n4 x9 R; Q$ ^5 F+ q* Z* [cles were prepubertal in size. However, testotoxicosis) U U9 z) B* \7 f: p s
was in the differential diagnosis because his father, ^. n! I) r1 P/ v1 B# V1 E
started puberty somewhat early, and occasionally,; U6 Y" P; N9 d$ D( M
testicular enlargement is not that evident in the
& v$ c& w' d8 C# G; Y& q! `beginning of this process.1 In the absence of a neg-
$ h# Y' g6 c6 e6 P6 z' [1 P! wative initial history of androgen exposure, our
0 {/ J+ _% ]: n& t6 ?' a% I5 cbiggest concern was virilizing adrenal hyperplasia,5 ?+ o! d: C8 q
either 21-hydroxylase deficiency or 11-β hydroxylase* y. |; B* Q5 v- D
deficiency. Those diagnoses were excluded by find-
8 D8 V- o+ t" T7 P. a1 Sing the normal level of adrenal steroids.
9 ~# y3 b- `4 p( a F4 z9 eThe diagnosis of exogenous androgens was strongly3 E! S: Z/ {8 s* o
suspected in a follow-up visit after 4 months because
- c0 Z3 C6 [1 z: C) ]the physical examination revealed the complete disap-4 w# T7 d7 Q8 @% `' Q# \
pearance of pubic hair, normal growth velocity, and$ V5 ^4 T; c" Z. C/ i* e
decreased erections. The father admitted using a testos-' m6 g" Y/ j7 b) C9 f6 L' F9 f( y
terone gel, which he concealed at first visit. He was
5 S- I5 g3 K. b6 n% c; Lusing it rather frequently, twice a day. The Physicians’1 ~4 n3 e7 R. d/ |" L0 _! j& y1 _
Desk Reference, or package insert of this product, gel or
0 z1 e/ b# U6 p- z$ R8 v4 u& acream, cautions about dermal testosterone transfer to2 h6 a4 x# {( N) Z# H- P4 G
unprotected females through direct skin exposure.6 }5 ?4 W% y; g: p: \+ ~
Serum testosterone level was found to be 2 times the. }, w* O1 N7 l0 Y
baseline value in those females who were exposed to% n5 ]- v( Z& t, p
even 15 minutes of direct skin contact with their male
}- W, N* [2 Ppartners.6 However, when a shirt covered the applica-! w1 C! Q/ g4 h4 v
tion site, this testosterone transfer was prevented.% b6 `" @- p) }6 |
Our patient’s testosterone level was 60 ng/mL,0 C. \, P- ^8 D3 a0 B& s+ Y: }
which was clearly high. Some studies suggest that
3 d0 j; p3 }1 T0 fdermal conversion of testosterone to dihydrotestos-5 F2 f- i2 I# f$ o6 Q$ h) ?$ ^6 _* K
terone, which is a more potent metabolite, is more* N! N3 I- w$ A% q
active in young children exposed to testosterone7 O& a* A. i' K1 [
exogenously7; however, we did not measure a dihy-0 C. C; i7 V& p% Z4 Z @# J* Y
drotestosterone level in our patient. In addition to6 I2 y/ S# O" }; J Z0 J
virilization, exposure to exogenous testosterone in9 {" [" g! v& \" B7 \
children results in an increase in growth velocity and
: R1 a& ?9 c( }5 {advanced bone age, as seen in our patient.' h$ Q0 e( [: F2 }
The long-term effect of androgen exposure during
$ [% z- T1 K6 R" r& Aearly childhood on pubertal development and final
1 d K. J& w; J! ?8 k+ gadult height are not fully known and always remain1 h( r! O6 ]4 c- p
a concern. Children treated with short-term testos-
* w6 ^2 G3 |& }7 G" tterone injection or topical androgen may exhibit some
; b# A; W* V" V3 p3 ], R8 Qacceleration of the skeletal maturation; however, after
9 k% W' B- X$ z6 }% ~cessation of treatment, the rate of bone maturation
( G' ?! _ h0 Y+ ^* n& i# H% jdecelerates and gradually returns to normal.8,9
7 W" q; D( \' W& E4 Q; YThere are conflicting reports and controversy
8 n6 `" X% V! c. i. pover the effect of early androgen exposure on adult$ ?% T5 O% [8 }) Q% e1 s/ R0 G
penile length.10,11 Some reports suggest subnormal
1 u9 }+ ^/ w0 m7 w, z, ~+ ]8 q2 |adult penile length, apparently because of downreg-5 l& h4 H* S: Q/ x( i c
ulation of androgen receptor number.10,12 However,
1 e9 f# F; L1 P+ {/ jSutherland et al13 did not find a correlation between* P! U% w3 G( W9 a S
childhood testosterone exposure and reduced adult* b: u/ s8 S# }
penile length in clinical studies.
' C1 B6 f/ D* V- x P' ^" o) NNonetheless, we do not believe our patient is% n$ O& ~) p" f8 ?! \! v7 R
going to experience any of the untoward effects from" `" r& G/ y# T- L# k5 {
testosterone exposure as mentioned earlier because4 Z9 a5 R; `' k L ~* G
the exposure was not for a prolonged period of time.
8 X6 M: q! D3 t$ j5 C. \0 i( `Although the bone age was advanced at the time of5 N; r1 W, X# J" `& ^* Y
diagnosis, the child had a normal growth velocity at6 x" ? b5 U- z& y9 a) R
the follow-up visit. It is hoped that his final adult
: j! C D X: u% B, Iheight will not be affected." ?& a- e$ i4 q8 z6 c/ u& ]" {! \$ j
Although rarely reported, the widespread avail-
5 \! f$ _! M. Z: G' W) Oability of androgen products in our society may
$ n4 v7 ~; b. d9 w/ J! q" ]indeed cause more virilization in male or female2 G9 `* I, d( }
children than one would realize. Exposure to andro-# Z/ x9 ~: M7 U8 H% j& ~& F
gen products must be considered and specific ques-7 M6 `# V) |4 R" S: |$ g9 }# _0 p
tioning about the use of a testosterone product or7 Q: F: R$ g; f" h
gel should be asked of the family members during# C: [5 f6 u! l# Z' Q
the evaluation of any children who present with vir-3 p0 [5 R6 J e% ^2 O: m1 o
ilization or peripheral precocious puberty. The diag-% S, Z) o( }% H) |
nosis can be established by just a few tests and by$ }6 s2 L$ R: f0 i' w+ R0 ]# b
appropriate history. The inability to obtain such a' I: [# g3 |" v( j7 C* B
history, or failure to ask the specific questions, may7 q$ N A& ~4 R
result in extensive, unnecessary, and expensive* g2 |5 u# R6 J& c% ^
investigation. The primary care physician should be
5 R- ~. ]4 g# \, P) b+ H! _$ paware of this fact, because most of these children- C/ Z* U' d: }, ~( O9 Y& G4 J
may initially present in their practice. The Physicians’& ^6 Z% g" c! }+ ^$ v1 F& @# _
Desk Reference and package insert should also put a
. o- K2 T3 y! u" m7 }warning about the virilizing effect on a male or
1 K- P e) A7 ~# h/ efemale child who might come in contact with some-6 S' k; W" E6 { {( ]
one using any of these products.$ [, r0 G ~8 Z9 @$ j* A
References" C8 n y7 W# \/ a& g7 @7 Q0 F5 I2 g
1. Styne DM. The testes: disorder of sexual differentiation, j9 X8 e( J0 a8 w* g; D5 f8 Q
and puberty in the male. In: Sperling MA, ed. Pediatric
t3 B1 W7 U/ m4 q4 q' ?Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;4 s: @$ F' k, P4 B4 K" n {
2002: 565-628.' h- s) z! D8 V
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
: O, Q. T) c6 Qpuberty in children with tumours of the suprasellar pineal
# k$ ~- F3 M& E( {7 b* Yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
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areas: organic central precocious puberty. Acta Paediatr.
0 t8 ]6 o% I; m& i* Z! {# t- P& F2001;90:751-756.4 K. K1 N8 l |# h4 C3 v
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.: | m$ T" c! T H0 C
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
- J1 {4 d1 f! ^8 x" \( D0 oDekker Inc; 2003:211-238.
$ i" I' S" X; X/ O/ P% |( Z4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
- U2 e( z* [# }8 D. edevelopment in a two-year-old boy induced by topical1 p" i0 M# P J3 Y: V a9 b
exposure to testosterone. Pediatrics. 1999;104:e23.
- u- o. k8 d% l4 z" s0 {5 m/ A, B! B2 W5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
- `/ }1 j6 l2 bSkeletal Development of the Hand and Wrist. 2nd ed.$ r7 |+ r4 `" A4 b( g+ \: @: K: Z/ S
Stanford, CA: Stanford University Press; 1959.$ C; C4 x% K- W5 l* t
6. Physicians’ Desk Reference. Androgel 1% testosterone,
3 a3 j+ s/ M0 K7 h! v2 z! {* wUnimed Pharmaceutical Inc. Montvale, NJ: Medical* E! e% X2 |$ `
Economics Company, Inc; 2004:3239-3241./ }6 O9 [1 g" W
7. Klugo RC, Cerny JC. Response of micropenis to topical
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