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is a significant concern for physicians. Central* W, N& k+ u) x( Y
precocious puberty (CPP), which is mediated- P% H6 x& M# F0 F' a
through the hypothalamic pituitary gonadal axis, has0 U$ W& b; W6 q
a higher incidence of organic central nervous system
. ]( G ^- Q1 `) ~& ^1 x% E4 S$ nlesions in boys.1,2 Virilization in boys, as manifested
$ ^ g* V* {/ {' Iby enlargement of the penis, development of pubic! V! p0 F/ j8 T: B4 D1 w. { ~8 O
hair, and facial acne without enlargement of testi-
% l, g* `0 p$ D7 N# k( s7 Rcles, suggests peripheral or pseudopuberty.1-3 We) B4 S0 E% @! n3 F4 |( g
report a 16-month-old boy who presented with the9 Y- v( q' [% \4 L. P
enlargement of the phallus and pubic hair develop-
! x5 U, u9 s5 o4 A% i) X2 qment without testicular enlargement, which was due
$ A+ y' A4 M0 k0 ]5 r. C4 ato the unintentional exposure to androgen gel used by [7 S4 D6 t0 s* C, l% b
the father. The family initially concealed this infor-
) H \! r# ~$ Emation, resulting in an extensive work-up for this
/ r* X% B, t# L7 K, \8 I' U2 fchild. Given the widespread and easy availability of
3 b9 n' z3 N3 W5 t: d% Xtestosterone gel and cream, we believe this is proba-
/ t' m5 A6 X8 D9 H" J8 a: \' tbly more common than the rare case report in the6 {/ C( u5 \, ~+ w+ A3 M
literature.47 r8 T# _8 ?% R4 Z$ [4 U4 F; Y0 D! J
Patient Report' J5 w- ]9 b) c
A 16-month-old white child was referred to the
6 G0 J2 y# |) f8 bendocrine clinic by his pediatrician with the concern# l6 _% J) E3 ~# E0 Q5 z
of early sexual development. His mother noticed1 l8 i/ V8 F4 ~/ _0 S# }
light colored pubic hair development when he was
3 }# d: ~) o* eFrom the 1Division of Pediatric Endocrinology, 2University of
4 g! r8 A6 ~) M- C$ dSouth Alabama Medical Center, Mobile, Alabama.
6 l+ n) A$ _) p2 R/ s$ w$ n6 }Address correspondence to: Samar K. Bhowmick, MD, FACE,, D. x, v$ j+ S6 ]4 v8 Y
Professor of Pediatrics, University of South Alabama, College of
4 B3 z7 S# s0 OMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
% S2 ^2 g5 Y9 n5 f" @" [& `e-mail: [email protected].$ z" J2 U, c2 a5 E4 r
about 6 to 7 months old, which progressively became
1 ]+ W- g5 p9 C/ q/ T0 W( }9 jdarker. She was also concerned about the enlarge-+ I3 Z3 ~% U- x- h
ment of his penis and frequent erections. The child8 e6 z: h% j& H4 }- T# h* ?8 `0 \
was the product of a full-term normal delivery, with1 f9 [* W5 b( i# F: ]$ \2 l; n
a birth weight of 7 lb 14 oz, and birth length of' f( o3 q+ ^$ \* O {
20 inches. He was breast-fed throughout the first year
3 w" l9 j* k+ Q$ h- s( Lof life and was still receiving breast milk along with+ \# c8 Y5 S. s( \8 Z: u s
solid food. He had no hospitalizations or surgery,8 R) Y* I$ n5 y8 z3 _9 g, j8 M
and his psychosocial and psychomotor development
3 Z3 I7 o! U" `3 @% s. B, f* twas age appropriate.
$ e3 K+ Z' }# X8 H1 }1 n& E9 {; l) ^The family history was remarkable for the father, }. Y/ c: _; W/ H
who was diagnosed with hypothyroidism at age 16,4 i% D" Z* p7 f5 y$ [
which was treated with thyroxine. The father’s* g: e1 t* \9 a1 n* ^
height was 6 feet, and he went through a somewhat* d+ z. o) H# d$ u
early puberty and had stopped growing by age 14.
2 @/ L8 }" T3 r9 RThe father denied taking any other medication. The
/ i5 e- S7 t+ R3 m, i7 e7 {& kchild’s mother was in good health. Her menarche: \5 N% Q4 l4 S; u" R* A* W2 d
was at 11 years of age, and her height was at 5 feet
0 Y% } _6 W7 h2 W; E4 G$ g5 inches. There was no other family history of pre-
; K& x& i- K) r4 N( t/ B% ccocious sexual development in the first-degree rela-
. D: s+ D# y/ C$ R% ktives. There were no siblings. |. B- T F, A- m& L7 G8 |; c' y
Physical Examination
; K: R+ {7 y5 G) V& b S: cThe physical examination revealed a very active,
+ F7 X" ?0 A) }) G+ K) r# }& rplayful, and healthy boy. The vital signs documented
& J! ?& i3 J8 s& Sa blood pressure of 85/50 mm Hg, his length was
B2 a* L, N% G0 @) ]* f7 T- c2 v90 cm (>97th percentile), and his weight was 14.4 kg
$ x) y% S% ?: A" D D. _* i, l(also >97th percentile). The observed yearly growth& H% a5 H$ e, p2 d2 j' K& q- s
velocity was 30 cm (12 inches). The examination of. {8 {4 r. a3 B4 Z8 o
the neck revealed no thyroid enlargement.
! v+ A" ?. }* B5 h8 AThe genitourinary examination was remarkable for
+ s# K$ d5 z& |# [enlargement of the penis, with a stretched length of
# L+ ~: J8 f4 C- v! S) S8 cm and a width of 2 cm. The glans penis was very well* w! ?+ R; b! J* t) n- G5 l$ v* Q
developed. The pubic hair was Tanner II, mostly around
, m+ B- V3 X/ Z6 b# l1 T% i' w5402 r4 ?; p- E1 [' x9 [% c9 Z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from2 A9 ^9 \4 O1 N# f
the base of the phallus and was dark and curled. The
5 ?; O! f' u5 Q& @; m+ R: ztesticular volume was prepubertal at 2 mL each.0 ^: e& `3 X7 z/ ^- S6 w
The skin was moist and smooth and somewhat, C" e6 t2 y U1 g
oily. No axillary hair was noted. There were no
" u+ }) F- Y9 t% \& eabnormal skin pigmentations or café-au-lait spots.* {/ Q7 v2 W( D1 P' A
Neurologic evaluation showed deep tendon reflex 2+
$ x6 t5 @, |8 U4 y% k4 Pbilateral and symmetrical. There was no suggestion
. _5 \8 G, L# i# k: J, a4 H9 oof papilledema.
; }$ J2 V* N, q4 BLaboratory Evaluation" m+ i, ~4 A6 H! C0 c) g
The bone age was consistent with 28 months by
; X0 L3 g. X8 U7 y' ]& X) f. Vusing the standard of Greulich and Pyle at a chrono-
' h, S& k6 F' r. T3 ]/ dlogic age of 16 months (advanced).5 Chromosomal
% A+ a2 Z: ^% c; ]( w: ]$ `karyotype was 46XY. The thyroid function test
" s6 u4 {" R7 P6 rshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
% S2 P8 n1 Y" N; v' b7 T1 dlating hormone level was 1.3 µIU/mL (both normal).0 G; o/ q" t1 c
The concentrations of serum electrolytes, blood( K8 w: j& `, ~/ J% [+ f
urea nitrogen, creatinine, and calcium all were) f4 a5 P% M. u5 ^9 R) z4 R' M
within normal range for his age. The concentration0 [& q3 c7 W4 I# D& W# ?
of serum 17-hydroxyprogesterone was 16 ng/dL
# ^( N | u8 f4 z+ l% i8 }) d* a: _(normal, 3 to 90 ng/dL), androstenedione was 20
, q% K% ]1 k% Y( t& A4 I3 h& Eng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-- A: H) t; R6 J& j8 G3 L! |% o
terone was 38 ng/dL (normal, 50 to 760 ng/dL)," @' p. p0 R6 X# _/ U! N2 ^
desoxycorticosterone was 4.3 ng/dL (normal, 7 to& x' e# c; J7 c9 i
49ng/dL), 11-desoxycortisol (specific compound S)( w/ Y+ O: B$ H' S2 Z
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
* H' I" w2 f+ o, y% i- L( rtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total& Z8 `3 @: ~4 f0 @: W: J5 x
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),2 c" [2 e* l' W" [' g! q2 Z7 @
and β-human chorionic gonadotropin was less than
; ]) H6 }3 B5 J) l8 y$ {8 c5 mIU/mL (normal <5 mIU/mL). Serum follicular
: B. E8 e: ?6 k! {* jstimulating hormone and leuteinizing hormone
5 m! r9 Y" Z* _- z3 Oconcentrations were less than 0.05 mIU/mL1 I% X0 B# R# `: s
(prepubertal).
1 X4 t* m+ Y0 {4 O _The parents were notified about the laboratory
; W( d/ V9 R2 J( mresults and were informed that all of the tests were
`8 H7 h. U fnormal except the testosterone level was high. The
0 k+ c9 V% b' L9 U/ tfollow-up visit was arranged within a few weeks to* x, L0 F2 q8 |2 M' W# ]1 C+ w. |
obtain testicular and abdominal sonograms; how-
% w% Y- C1 U1 m9 H& V: S% yever, the family did not return for 4 months.
2 y% v' U' _% X g2 @Physical examination at this time revealed that the' f. T: r! _' V) |% f. P% R& K+ ~
child had grown 2.5 cm in 4 months and had gained
8 z/ l, a8 {0 ] b( j4 [2 kg of weight. Physical examination remained
. e( x' {/ D; {; G# j1 \" a7 Iunchanged. Surprisingly, the pubic hair almost com-$ C6 }) H1 q8 p
pletely disappeared except for a few vellous hairs at' b4 M [& B3 B5 ?
the base of the phallus. Testicular volume was still 2$ a" u/ I. N0 F+ A t
mL, and the size of the penis remained unchanged.# |. M& `4 J9 F* E% l2 o2 N1 b0 A C" v
The mother also said that the boy was no longer hav-0 A! x$ q" {4 Y* d3 ?0 k. ~. m. O
ing frequent erections.+ a6 z+ I8 Q6 d; Q% z3 d8 e1 d& h
Both parents were again questioned about use of# @: W/ q5 R5 ?. ]' e
any ointment/creams that they may have applied to8 z* S4 y2 J- l+ v$ w# n% h
the child’s skin. This time the father admitted the
n" g( ^0 ~7 {Topical Testosterone Exposure / Bhowmick et al 541
7 V8 r3 D% n/ @" z$ n9 [( vuse of testosterone gel twice daily that he was apply-) ^" f) x( L m6 r O) _# N
ing over his own shoulders, chest, and back area for
- b: [/ b7 C3 Z# ra year. The father also revealed he was embarrassed
# q9 B$ r0 O% h& e0 J( Z6 Y7 ?( Fto disclose that he was using a testosterone gel pre-- q4 W; s- W% P4 W
scribed by his family physician for decreased libido$ c4 q ]! }/ o T! x
secondary to depression.
5 o& Q! Y6 l/ K, h7 P& }The child slept in the same bed with parents.3 Y/ O% }0 c( r: E
The father would hug the baby and hold him on his" P, e, L( |1 s( J# @( L
chest for a considerable period of time, causing sig-
- \# b- e- C& o- Z. knificant bare skin contact between baby and father.
7 }: s& c+ T9 S k. W: z gThe father also admitted that after the phone call,
" y8 |% k" Y) q5 S' A+ F$ jwhen he learned the testosterone level in the baby
4 A& v( N) p) G$ R/ Xwas high, he then read the product information
' `7 s) o6 Z1 W9 r6 _packet and concluded that it was most likely the rea-
, |, D9 n9 s) X8 ?son for the child’s virilization. At that time, they
! w+ I8 C1 n7 ]- zdecided to put the baby in a separate bed, and the/ ~/ q. |" h1 y& K- m2 M' z
father was not hugging him with bare skin and had1 `" s! P5 x6 G! Y2 z, x
been using protective clothing. A repeat testosterone
* _, z. g- r+ a4 W+ Ttest was ordered, but the family did not go to the) `1 U N* \8 ^) H4 `" I+ ~# V
laboratory to obtain the test.1 M" P! O8 G, `+ S+ Q t
Discussion( `+ g* N- x, z/ @) ^
Precocious puberty in boys is defined as secondary5 j2 }+ h8 {4 _, Q; T5 J! Y
sexual development before 9 years of age.1,45 {0 a: g# ^! u0 N
Precocious puberty is termed as central (true) when" L( a6 W9 M( ?* Z \1 C
it is caused by the premature activation of hypo-
0 a- e: K* w! i5 V; b+ x# Hthalamic pituitary gonadal axis. CPP is more com-
9 @0 T( _# @+ K; ?7 omon in girls than in boys.1,3 Most boys with CPP! z4 _1 ]# t# H; J5 V ~
may have a central nervous system lesion that is
y" e2 P9 }6 k. t( ~% z5 x) E! cresponsible for the early activation of the hypothal-1 C9 k5 m1 U/ {& X @% y( E
amic pituitary gonadal axis.1-3 Thus, greater empha-
7 A7 u* X4 D3 P* A3 s9 d, wsis has been given to neuroradiologic imaging in4 z* ]; I0 H" x: t3 _, r: \
boys with precocious puberty. In addition to viril-
& ]+ e6 D. I/ L; L5 Qization, the clinical hallmark of CPP is the symmet-6 h9 _/ M1 Y; s9 N6 v3 W. c; [
rical testicular growth secondary to stimulation by8 ~3 a0 U& n& g- i0 ~
gonadotropins.1,3
! z. n3 g$ ~" p! ?6 G* vGonadotropin-independent peripheral preco-
* Y8 I/ H" u3 r: b$ Y5 Dcious puberty in boys also results from inappropriate8 e7 ?7 i3 X; j7 P
androgenic stimulation from either endogenous or
; G* ]5 \. g8 }2 o# g. bexogenous sources, nonpituitary gonadotropin stim-! Q: t' F) U6 k: s' ^8 U* }) z
ulation, and rare activating mutations.3 Virilizing6 G- K$ T7 J8 d* C
congenital adrenal hyperplasia producing excessive! x6 |! O: l: u
adrenal androgens is a common cause of precocious' Z( g. P2 {% D6 T1 C6 p' j( z
puberty in boys.3,4 h" O$ E: ~3 r8 D3 r
The most common form of congenital adrenal$ c6 r$ P4 P4 a- T- N% e. p
hyperplasia is the 21-hydroxylase enzyme deficiency.' X: k% U+ S- N7 a$ X
The 11-β hydroxylase deficiency may also result in a) v* o: L! A0 e) P" v& R2 }
excessive adrenal androgen production, and rarely,* O) K) }8 L) p+ v: i
an adrenal tumor may also cause adrenal androgen/ ~% c3 A" p4 z
excess.1,3' v7 s \4 T" e- K8 {- W& ^4 V* ?% W% y
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
; o. `; J6 J/ s) h& ~542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
- k! O) Q: v. G) d; c# DA unique entity of male-limited gonadotropin-
+ e8 P6 s5 U0 J, \" `* ~independent precocious puberty, which is also known
8 g5 k* B% @! B! @+ f8 V+ Kas testotoxicosis, may cause precocious puberty at a
/ m& L% H+ Z, v; zvery young age. The physical findings in these boys. U2 l$ f5 i( {1 d4 W9 F
with this disorder are full pubertal development,! }" M/ K4 ^, m5 J6 W* z
including bilateral testicular growth, similar to boys$ d1 \) d) {# ?" V1 I+ m5 X, ]
with CPP. The gonadotropin levels in this disorder
1 ^6 z. R& b6 Pare suppressed to prepubertal levels and do not show5 ]6 z8 l4 s+ V9 \* |# m* R- u
pubertal response of gonadotropin after gonadotropin-
8 f; v/ j+ W% P+ i9 C" jreleasing hormone stimulation. This is a sex-linked& ]6 x) K, x2 g1 d9 ^$ _3 T# x
autosomal dominant disorder that affects only
3 a# f1 F4 M: `" V( dmales; therefore, other male members of the family* T, j; W. c; b3 Z
may have similar precocious puberty.31 S, B8 U3 U2 b. u; K
In our patient, physical examination was incon-9 E; z: W t# L/ r
sistent with true precocious puberty since his testi- a2 I- v8 m' ?6 w! y# w
cles were prepubertal in size. However, testotoxicosis1 Q s! ?7 w! m( P# d( D# d
was in the differential diagnosis because his father
4 I9 A8 C9 O- L+ Dstarted puberty somewhat early, and occasionally,
, \. n# D( `- dtesticular enlargement is not that evident in the2 I5 r9 }+ T" m' I
beginning of this process.1 In the absence of a neg-3 l- [: x1 z4 p
ative initial history of androgen exposure, our- ^ J, o7 v( R0 C( E! q: b
biggest concern was virilizing adrenal hyperplasia,
& S7 r V) O d" d' r! J3 Veither 21-hydroxylase deficiency or 11-β hydroxylase
$ |4 s8 }/ @* A& `/ D. }deficiency. Those diagnoses were excluded by find-' s0 ~1 ~0 l: Y) E6 x
ing the normal level of adrenal steroids.
- q( J0 y$ W* _* c0 A8 z; _The diagnosis of exogenous androgens was strongly
* @4 I2 ]6 v+ e) T' Osuspected in a follow-up visit after 4 months because) `. a6 c# D1 h T# U8 p! Z2 x
the physical examination revealed the complete disap-
& M& W O, D/ u4 ~2 i8 F# Upearance of pubic hair, normal growth velocity, and2 M6 E1 V; F l: B8 ?# F2 f
decreased erections. The father admitted using a testos-/ F1 z+ y3 l( l! l+ U5 {- |5 j
terone gel, which he concealed at first visit. He was+ ^4 ^8 }% v+ } A+ M% H5 o$ u2 E
using it rather frequently, twice a day. The Physicians’4 l$ a: J: Q0 u
Desk Reference, or package insert of this product, gel or1 l) |: s5 U! e4 n! @
cream, cautions about dermal testosterone transfer to+ f1 N, c5 \8 [; p p/ p
unprotected females through direct skin exposure.+ A8 ~& |1 Y7 p: W
Serum testosterone level was found to be 2 times the
! ~4 X. n; U. b6 ~' k$ w1 mbaseline value in those females who were exposed to N0 i0 {8 u6 D1 b" \3 X
even 15 minutes of direct skin contact with their male, u* s) K) v! |# J( c) m t8 a! O
partners.6 However, when a shirt covered the applica-
* h& C8 ?1 W+ P2 Jtion site, this testosterone transfer was prevented.
6 Y/ _4 g6 z8 N, [. m, ^Our patient’s testosterone level was 60 ng/mL,# _$ a4 ]" G4 @7 H
which was clearly high. Some studies suggest that7 p! W- {/ `) n" o6 O
dermal conversion of testosterone to dihydrotestos-
& v1 O- V0 O: j9 d) k% e+ |terone, which is a more potent metabolite, is more
, N e: C/ m' y; c4 Q: a2 Hactive in young children exposed to testosterone, {) ~; V* h; h9 c# e. O
exogenously7; however, we did not measure a dihy-+ [9 Q& I; G& z" G( K
drotestosterone level in our patient. In addition to
8 E7 {, t' v8 {4 ?; Z1 d1 f) a8 }virilization, exposure to exogenous testosterone in
% N& u. ^% E5 ~children results in an increase in growth velocity and3 e: g& d5 W1 V3 x3 |
advanced bone age, as seen in our patient.! `$ e8 R8 z' q! `% y5 q
The long-term effect of androgen exposure during1 ?5 N/ M, F; }4 g
early childhood on pubertal development and final$ S2 N3 r7 E3 l) Y
adult height are not fully known and always remain
3 N( b7 L: d# _& t6 w r; n* ~, c' |a concern. Children treated with short-term testos-0 f3 m4 N# t L) {# f8 W
terone injection or topical androgen may exhibit some
# Y% m$ N5 ?0 |* D# e8 {! Lacceleration of the skeletal maturation; however, after1 Q$ X$ y6 A! E
cessation of treatment, the rate of bone maturation
0 {$ p% }! O- m8 [1 K4 Ndecelerates and gradually returns to normal.8,9" G& J+ q* @+ e: |7 M6 i
There are conflicting reports and controversy
r7 B8 w; k. ? Pover the effect of early androgen exposure on adult4 n$ r0 i* j) N* w
penile length.10,11 Some reports suggest subnormal
' N9 h0 p4 H0 M2 K+ i# u4 wadult penile length, apparently because of downreg-2 ?, P! ?5 j8 m$ u
ulation of androgen receptor number.10,12 However,
4 y/ ~4 N4 R R. j. P$ lSutherland et al13 did not find a correlation between: Y; @5 n0 J; f+ Z1 t
childhood testosterone exposure and reduced adult, b$ Y w3 }) ^8 u4 b+ Y
penile length in clinical studies.
) d }3 y: L; @Nonetheless, we do not believe our patient is3 y2 J7 t1 }* c2 B
going to experience any of the untoward effects from
k3 \1 ~! [0 z2 | V' o3 btestosterone exposure as mentioned earlier because
# ?# v* U% Z' o- r. P8 ythe exposure was not for a prolonged period of time.# l" r% W8 z+ V' F
Although the bone age was advanced at the time of
/ c4 J5 P7 A Ydiagnosis, the child had a normal growth velocity at( j0 b% J5 K. D
the follow-up visit. It is hoped that his final adult& V+ f4 m* {* v; Q5 T
height will not be affected.
L( S0 W' H. p# z3 U; VAlthough rarely reported, the widespread avail-5 J# U( p, Z6 a
ability of androgen products in our society may" a6 o Q/ W. q, m) T9 d( q
indeed cause more virilization in male or female
& [0 F0 m) U& j& qchildren than one would realize. Exposure to andro-
( G# U& ^) `5 L: u9 Agen products must be considered and specific ques-8 F% d/ Y# A+ F5 l" s5 w; X
tioning about the use of a testosterone product or
5 l) E) u4 }6 R& a( kgel should be asked of the family members during$ g7 ]* T) D# K. F, Q! i
the evaluation of any children who present with vir-
( ], v- C% E8 o# z- u1 {ilization or peripheral precocious puberty. The diag-
4 D* t4 [! L9 I ?& ^ Unosis can be established by just a few tests and by
& z) W. Y; N6 V( E; ^; gappropriate history. The inability to obtain such a+ d6 x3 q( T( \6 H( F
history, or failure to ask the specific questions, may+ g& u% L4 d" {& K
result in extensive, unnecessary, and expensive
3 S- ^4 }' x; Dinvestigation. The primary care physician should be: p9 z" v% f+ g7 Q2 A
aware of this fact, because most of these children
' c8 a* D4 c, b: A3 I+ lmay initially present in their practice. The Physicians’4 m# a: s+ i. e& F
Desk Reference and package insert should also put a
* L1 s( U2 I( kwarning about the virilizing effect on a male or5 n( q- [& U1 d* z6 v
female child who might come in contact with some-4 `% D6 o8 R6 V" @9 y6 }
one using any of these products.1 f9 h: i/ W O3 ^9 R
References+ C7 X: Y$ m' z8 E1 B: f
1. Styne DM. The testes: disorder of sexual differentiation
# j% F$ x R6 ?3 y8 Land puberty in the male. In: Sperling MA, ed. Pediatric0 f& c; Z+ U7 K6 T8 E0 k
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders; A# O& M! S! {: S `4 e5 Z! k# |
2002: 565-628.& F. W, d4 o% F! o& K
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
, }$ K: X' v. ^. ?puberty in children with tumours of the suprasellar pineal8 ~$ ^+ g! P b6 e" A& P
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Topical Testosterone Exposure / Bhowmick et al 543
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2001;90:751-756.
* W% o) P# |, _+ c$ q- L4 Y2 u3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.$ d* a3 A8 t5 ^. E. F7 `
Pediatric Endocrinology. 4th ed. New York, NY: Marcel. n4 S8 N( f2 O7 Z3 }* L' ?
Dekker Inc; 2003:211-238.
! \ ?. X1 ^' U3 m; a; V4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual- d: G! v3 V* }) D* B$ [; K+ ~: D# E
development in a two-year-old boy induced by topical+ b e) W9 {' d3 j1 [; L
exposure to testosterone. Pediatrics. 1999;104:e23.( [4 R, B9 x$ k5 z) i* H
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of; |# x4 ?* E% V; J
Skeletal Development of the Hand and Wrist. 2nd ed.1 r1 Q( G2 e9 {" X, l2 \' K! y
Stanford, CA: Stanford University Press; 1959.) r4 o, N- g) N& X2 J
6. Physicians’ Desk Reference. Androgel 1% testosterone,
% C+ e; Y' \ X P2 [Unimed Pharmaceutical Inc. Montvale, NJ: Medical9 i9 }- t1 _9 @! J9 Y, C" S) \* K. @
Economics Company, Inc; 2004:3239-3241.
* v) d0 a$ p4 U' k1 z7. Klugo RC, Cerny JC. Response of micropenis to topical
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