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is a significant concern for physicians. Central+ m/ z/ ^( g* P
precocious puberty (CPP), which is mediated. A9 d9 d+ `0 R, Z' S" L- [4 K/ m: O
through the hypothalamic pituitary gonadal axis, has% B }! r7 Z/ t5 }
a higher incidence of organic central nervous system9 l" v# s- P' [0 r; w2 Q/ R% o5 B1 n
lesions in boys.1,2 Virilization in boys, as manifested
# L$ Z* S E( Eby enlargement of the penis, development of pubic" L; U" P( ~- o% S6 @
hair, and facial acne without enlargement of testi-
$ g7 b; x, c5 J7 E8 X$ Wcles, suggests peripheral or pseudopuberty.1-3 We! ~5 ^% k" Q7 e! j. p" x, p9 v
report a 16-month-old boy who presented with the3 c5 q% k4 ?$ t2 [( u
enlargement of the phallus and pubic hair develop-
! h5 F) n7 H: e) c; Kment without testicular enlargement, which was due9 b- E3 T' p; }: D# F+ @' J
to the unintentional exposure to androgen gel used by8 j0 }( R. E9 ]. ~7 _, t$ I
the father. The family initially concealed this infor-. ?; R7 G8 d6 m* m' ?1 e
mation, resulting in an extensive work-up for this% N6 U) L4 [: S$ b
child. Given the widespread and easy availability of
y% x# M* t) m' J! S1 E, L Ptestosterone gel and cream, we believe this is proba-
5 x0 j, o+ l1 i- x0 J" Ybly more common than the rare case report in the
: K4 D! Y, b9 U) [" L. d. Oliterature.4: ^! a B: g3 V' R0 t8 c/ h
Patient Report
) v( k: f# n( o8 y! [# cA 16-month-old white child was referred to the
: c4 |2 W% P. Z+ C* |endocrine clinic by his pediatrician with the concern
" B. i7 O8 G8 ~" R8 Hof early sexual development. His mother noticed
: ^! G/ n ~$ Xlight colored pubic hair development when he was
_$ I$ P o: DFrom the 1Division of Pediatric Endocrinology, 2University of
* r; g h+ M* |# \( xSouth Alabama Medical Center, Mobile, Alabama.
0 U& p3 q9 w6 I, K( G( wAddress correspondence to: Samar K. Bhowmick, MD, FACE,
X) c7 H! n& h0 sProfessor of Pediatrics, University of South Alabama, College of; U; Q4 D, ^. b4 @% f5 T6 K/ g
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
6 ~7 f2 ~4 I6 de-mail: [email protected].1 \: ?2 n$ x" d( @7 {2 L+ u
about 6 to 7 months old, which progressively became( O" x9 O& V7 m4 m
darker. She was also concerned about the enlarge-* H7 J* o; E5 w
ment of his penis and frequent erections. The child
, k6 M& S3 g3 ^8 j& swas the product of a full-term normal delivery, with
% d$ _% \$ G0 d3 j: _a birth weight of 7 lb 14 oz, and birth length of
) [4 E! Y: M: R* [4 V20 inches. He was breast-fed throughout the first year
6 ]3 ^4 T* s9 o9 G5 z3 C0 ~, dof life and was still receiving breast milk along with
& m& E# o$ F3 nsolid food. He had no hospitalizations or surgery,
6 B: o1 T' x7 G/ s4 Pand his psychosocial and psychomotor development1 F8 n* l2 x! s5 c: K
was age appropriate.
K0 I$ s/ u: SThe family history was remarkable for the father,
; Q i' s# o1 {3 {8 u, t+ T2 Qwho was diagnosed with hypothyroidism at age 16,$ J5 f8 d0 l% k- q: x4 W" S
which was treated with thyroxine. The father’s
. j( q/ ]' a6 _: J) Pheight was 6 feet, and he went through a somewhat3 G. [6 f: Q7 Y. i$ `
early puberty and had stopped growing by age 14.) _+ N+ B4 t& N% E8 \5 k
The father denied taking any other medication. The+ h' t: A. n" f/ ^+ n6 t
child’s mother was in good health. Her menarche
3 ]4 D' y! ?8 w" W1 C. L; @1 |was at 11 years of age, and her height was at 5 feet
& n' O( t" ?% A: @5 Q% u5 inches. There was no other family history of pre-
# D! l4 V1 J- ucocious sexual development in the first-degree rela-
# |( `. g& ~( a+ M# {7 @tives. There were no siblings.
+ G+ p5 L; r0 S# U, B3 lPhysical Examination) c; U" t! j: n
The physical examination revealed a very active,! F' J2 f+ c& ]7 Q' K7 L& l$ r: b! \
playful, and healthy boy. The vital signs documented
% k$ V( a7 a; I, [% ^( S7 da blood pressure of 85/50 mm Hg, his length was" F3 V2 D6 y+ s: o' B
90 cm (>97th percentile), and his weight was 14.4 kg
3 I; S) X1 F8 G C, J(also >97th percentile). The observed yearly growth" t* ]6 p3 ~9 N6 A: O
velocity was 30 cm (12 inches). The examination of0 M* ~( G- S# j4 D* o$ G6 |
the neck revealed no thyroid enlargement.
- X% }$ h, [6 f, B& U& g! ^! `The genitourinary examination was remarkable for
2 x+ U& K+ m1 ]. b) [enlargement of the penis, with a stretched length of
7 h( E2 Y6 s6 h5 w% Z: m, X8 cm and a width of 2 cm. The glans penis was very well! F8 b3 u3 E$ H: ~. k* u. L1 ^( {
developed. The pubic hair was Tanner II, mostly around
0 \- u# ^% r( H' {3 E& E# L540* O8 I+ q1 {, R0 A- A0 Z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from2 K; K6 w* p0 v6 S, l5 c# L
the base of the phallus and was dark and curled. The
5 `8 l/ o) @4 l9 y; V, v7 wtesticular volume was prepubertal at 2 mL each.6 O# [$ N7 {+ s) a+ D9 c
The skin was moist and smooth and somewhat9 w6 B1 q, l) {7 s
oily. No axillary hair was noted. There were no
: p( {! U/ K- j" R% Cabnormal skin pigmentations or café-au-lait spots.
- n$ G8 m1 i3 kNeurologic evaluation showed deep tendon reflex 2+4 `' U# g0 R! |# r
bilateral and symmetrical. There was no suggestion
4 d6 O8 q+ ]$ M+ g3 N& o6 z0 cof papilledema.
& G5 w4 j K0 I$ R& f2 z f' @Laboratory Evaluation
D, w2 t- B8 Q9 SThe bone age was consistent with 28 months by; t3 R) i7 L% ^# M% a7 v
using the standard of Greulich and Pyle at a chrono-
; O: K% G4 c$ }' Ologic age of 16 months (advanced).5 Chromosomal9 D6 @3 V# H1 h% o4 w @
karyotype was 46XY. The thyroid function test
: P: `. F( z" ]; F/ ~& Ushowed a free T4 of 1.69 ng/dL, and thyroid stimu-9 M7 W) V5 ^4 f$ }' Z' V* [
lating hormone level was 1.3 µIU/mL (both normal).
4 T3 n( D5 `& g$ r9 CThe concentrations of serum electrolytes, blood- V" b5 a2 ]! v7 V* X4 T7 A
urea nitrogen, creatinine, and calcium all were
8 Y- j& f2 l+ r4 \' `within normal range for his age. The concentration
& W. v! E( e% e& Bof serum 17-hydroxyprogesterone was 16 ng/dL& ]/ `+ }: x# ?( S6 l! D; @* S/ g
(normal, 3 to 90 ng/dL), androstenedione was 20
1 i# ]7 W: t7 {ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-$ A: ^$ m- C% _7 N# _- I
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
! \! R% [8 _, F+ g4 X% b2 ]9 L1 ndesoxycorticosterone was 4.3 ng/dL (normal, 7 to5 N( O5 b( x* J3 p" a5 r
49ng/dL), 11-desoxycortisol (specific compound S)* g, W: k6 F4 C6 b+ E% R
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-4 r$ H5 ?3 g( N
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
- P# w, w8 X8 s* [* Mtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),. G/ W- M3 }: H. S# B
and β-human chorionic gonadotropin was less than
2 I- q% b3 b. W$ S; P2 c6 q7 l# e0 A5 mIU/mL (normal <5 mIU/mL). Serum follicular
% h1 r# L2 R, O. Q3 E0 V5 P- _$ H0 C& pstimulating hormone and leuteinizing hormone: y" U! Y# z9 z, h8 s* [0 x8 @
concentrations were less than 0.05 mIU/mL
2 ^; S8 C5 ` K" `8 t(prepubertal).9 \8 b# ^" n. ], D2 k+ y
The parents were notified about the laboratory
( U2 x$ G5 B8 a Z3 B2 @( jresults and were informed that all of the tests were
0 ^5 R; L- Y3 E" i, Q. A6 Bnormal except the testosterone level was high. The
: E* E; E! ^8 Zfollow-up visit was arranged within a few weeks to
+ \0 b; j8 `5 U7 m! fobtain testicular and abdominal sonograms; how-, Q B; V! u V R" ^4 D( t6 }
ever, the family did not return for 4 months.
5 E3 q5 c. w5 ~; n0 FPhysical examination at this time revealed that the6 |7 h! T% c+ J$ R
child had grown 2.5 cm in 4 months and had gained' S8 z' K, K0 J( K( r
2 kg of weight. Physical examination remained
3 y) f _( Q+ G1 a% junchanged. Surprisingly, the pubic hair almost com-
e0 Y7 d: C* {5 M2 c: u3 H# bpletely disappeared except for a few vellous hairs at
! u4 S- v3 r' t) W. B$ Xthe base of the phallus. Testicular volume was still 2
7 Z( |5 y3 l* z" t& b# m9 m% {mL, and the size of the penis remained unchanged.& }/ r$ e* q$ J6 _$ O" w1 `
The mother also said that the boy was no longer hav-
# u* C* _* L6 |3 x. l6 Iing frequent erections./ a# O0 m/ [ ?9 I
Both parents were again questioned about use of7 T% k! s, W* W ~ Z+ b
any ointment/creams that they may have applied to
5 x( [8 Q3 K7 u5 b, a5 ithe child’s skin. This time the father admitted the
$ p6 t% ^1 s; @: u$ oTopical Testosterone Exposure / Bhowmick et al 541/ N" J" g3 b6 i$ [) b4 H4 G1 R
use of testosterone gel twice daily that he was apply-, N" i5 @- I5 R, q
ing over his own shoulders, chest, and back area for6 a/ w# ~: ^$ u& X* |9 q6 g2 e
a year. The father also revealed he was embarrassed
5 B* M( h$ E( c S; N7 _" ?to disclose that he was using a testosterone gel pre-
, ^( M5 e" o+ D& D! ?scribed by his family physician for decreased libido( P9 J5 Q+ l! j5 k
secondary to depression.
4 d0 Z4 v( [1 U& q& }3 Z f4 MThe child slept in the same bed with parents.
, B0 B L, z: s' q8 W/ ^& f' W6 ]The father would hug the baby and hold him on his) c9 N, Y2 S# D/ s8 f, E
chest for a considerable period of time, causing sig-" g m/ x j6 c6 Z$ x1 D8 m3 Y
nificant bare skin contact between baby and father.
" ^ a( j( n* v& P, x! ZThe father also admitted that after the phone call,: y, U! V0 M+ _4 u
when he learned the testosterone level in the baby
8 q& }7 C0 m. u8 Uwas high, he then read the product information
4 z9 P; E; s% X+ _- _packet and concluded that it was most likely the rea-
* m2 D5 w4 ]2 ^) Q0 z4 z" Yson for the child’s virilization. At that time, they+ u! B. m% R3 U
decided to put the baby in a separate bed, and the$ V- g8 a; E& \1 E0 H6 l
father was not hugging him with bare skin and had9 }- l e( p9 V" }* G
been using protective clothing. A repeat testosterone
/ f0 q+ ^; w+ I) B! a/ dtest was ordered, but the family did not go to the* R) D$ P0 {' t
laboratory to obtain the test.# H7 X- b( ]: n" z" g. [
Discussion+ ?' B$ _0 v( {2 t
Precocious puberty in boys is defined as secondary# {3 F* p/ Z. m
sexual development before 9 years of age.1,4
) d5 x) h. L) _Precocious puberty is termed as central (true) when" D& L. G1 R$ ^6 U
it is caused by the premature activation of hypo-
: y; X, E0 ]8 w; Lthalamic pituitary gonadal axis. CPP is more com-/ l- R, V; |. w2 h( \3 W
mon in girls than in boys.1,3 Most boys with CPP
. Z* N: t' ?4 X/ T2 B8 Mmay have a central nervous system lesion that is: l0 T1 h7 T9 [0 t6 }& X
responsible for the early activation of the hypothal-9 W) |0 j% O, I0 u4 S
amic pituitary gonadal axis.1-3 Thus, greater empha-
4 u6 E! \- v# o" ~" f# {sis has been given to neuroradiologic imaging in1 l$ k0 F. L6 g* g
boys with precocious puberty. In addition to viril-0 j9 Z$ B4 t* {5 _1 P0 A
ization, the clinical hallmark of CPP is the symmet-0 v/ |! e2 \6 \' U6 r7 L* O+ e0 v' w
rical testicular growth secondary to stimulation by
4 d2 n/ A: _ x5 t+ Bgonadotropins.1,3
+ `$ N4 W' ]6 s- v9 ?1 eGonadotropin-independent peripheral preco-7 L, [1 k, D3 v+ a4 ?4 B8 K5 C+ r
cious puberty in boys also results from inappropriate) e0 N9 h$ x# l) {0 N' \
androgenic stimulation from either endogenous or
- e1 ]/ \+ n/ A4 F( l2 D9 T6 _/ z! `7 Wexogenous sources, nonpituitary gonadotropin stim-
2 N% q4 R* F" B# O) f x0 Uulation, and rare activating mutations.3 Virilizing0 [& {; M( _% A& v2 @* _
congenital adrenal hyperplasia producing excessive8 d" ]" @) d. }% @
adrenal androgens is a common cause of precocious
- s4 Z( F% i+ x# f# Ypuberty in boys.3,4
7 B# X7 I! s2 H# H6 [The most common form of congenital adrenal* I& X b( P; G9 B
hyperplasia is the 21-hydroxylase enzyme deficiency.) U: C/ z$ u# q1 D1 l8 y
The 11-β hydroxylase deficiency may also result in
# H+ H6 N7 g9 J' aexcessive adrenal androgen production, and rarely,
' n2 F* [% i1 u# `an adrenal tumor may also cause adrenal androgen% ^1 v: O# Y7 @) r
excess.1,37 i* u" @4 B' g* B# M8 T
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' [9 U; {) }2 A& N: n" \) H
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
5 }4 X1 s( Y( L+ R+ lA unique entity of male-limited gonadotropin-
% h m% z: k- Q. G6 `6 K; t4 {' a; Nindependent precocious puberty, which is also known5 F& ~& i+ Q( Y* @, h! K5 u
as testotoxicosis, may cause precocious puberty at a& M$ W K" M( [/ \, R7 Y) L* k/ B/ [
very young age. The physical findings in these boys
# W! @% P6 u4 L; q4 Nwith this disorder are full pubertal development,
8 }) _5 Z+ W2 k+ z/ ]including bilateral testicular growth, similar to boys
% x$ o' ?; _! A# Xwith CPP. The gonadotropin levels in this disorder
" q7 u, A) ]$ w6 i: [& @are suppressed to prepubertal levels and do not show
9 W8 \0 i- P% Y8 K0 tpubertal response of gonadotropin after gonadotropin-
, V/ w6 o' ?; I1 Qreleasing hormone stimulation. This is a sex-linked1 j- r6 I' Z! r3 p
autosomal dominant disorder that affects only0 |! c- e! s" Q$ @( q6 B
males; therefore, other male members of the family
' J6 X1 ]9 ]3 C! a4 Lmay have similar precocious puberty.3& n/ }2 j) K5 x- ?1 a
In our patient, physical examination was incon-
6 u# h4 R) w% G* a* bsistent with true precocious puberty since his testi-: q' m( c N4 b$ F- J/ `# U$ Y
cles were prepubertal in size. However, testotoxicosis
+ c1 t1 m+ I1 k3 wwas in the differential diagnosis because his father
7 @4 o# P0 Y* a% A; E3 Y2 lstarted puberty somewhat early, and occasionally,2 z v) ^0 a! Y: X
testicular enlargement is not that evident in the( a f) X1 g) K' ~0 u( V
beginning of this process.1 In the absence of a neg-
$ C4 e( [6 [3 H3 ~9 M* d' Aative initial history of androgen exposure, our7 w# ?3 M) g) j; S7 k
biggest concern was virilizing adrenal hyperplasia,
/ a5 t! g( k' }6 H$ \ c5 qeither 21-hydroxylase deficiency or 11-β hydroxylase, k6 f' P% R* v; V
deficiency. Those diagnoses were excluded by find-% |& n6 ?" A1 q& [9 ^2 P- g
ing the normal level of adrenal steroids. a8 j ^5 L% ]* F6 g# q( ^: o9 T* N
The diagnosis of exogenous androgens was strongly
9 G; _# }% k& [; v5 E" I' X! Jsuspected in a follow-up visit after 4 months because2 N. {+ c9 C! K1 c
the physical examination revealed the complete disap-
3 k: I/ o* ~3 @$ ?# Opearance of pubic hair, normal growth velocity, and- P/ l! Y; }) p
decreased erections. The father admitted using a testos-
, X3 Z V% B) R- x, c }terone gel, which he concealed at first visit. He was
1 N. |9 ^* X4 S. m' Q. G- rusing it rather frequently, twice a day. The Physicians’
8 m6 r4 j4 C8 M8 ^Desk Reference, or package insert of this product, gel or& B' J4 g4 X4 w7 L1 I8 g
cream, cautions about dermal testosterone transfer to
- {4 D! Y# ^6 ?) T, A% xunprotected females through direct skin exposure.6 k7 [; Y# ]5 T! s& G9 b! s5 \/ }
Serum testosterone level was found to be 2 times the7 B' T4 T4 f, T. j' l8 \; Z+ s9 s G2 z
baseline value in those females who were exposed to$ r) f- L; O/ v3 g0 u y
even 15 minutes of direct skin contact with their male1 t5 b3 K% H) {5 z9 W4 s+ Z
partners.6 However, when a shirt covered the applica-
; X. M# }+ r+ T: dtion site, this testosterone transfer was prevented.3 r4 [# \' r2 H" T
Our patient’s testosterone level was 60 ng/mL,- i! B! a7 J/ K9 p0 N: y
which was clearly high. Some studies suggest that
. }! a q& O! c. Fdermal conversion of testosterone to dihydrotestos-
" T- l# Q8 Y1 A( ?7 E2 l% y/ g) f5 Yterone, which is a more potent metabolite, is more/ ^5 m2 T+ a% T* X3 w3 y2 R4 f
active in young children exposed to testosterone& C% o- m( N9 H& ?
exogenously7; however, we did not measure a dihy-
/ L( Y, L2 u$ K& E# ~) Odrotestosterone level in our patient. In addition to, U$ z+ c w" w/ d% { U
virilization, exposure to exogenous testosterone in
4 n4 R+ r$ K a+ ]children results in an increase in growth velocity and
5 U) _- S @: T; P* @* F( kadvanced bone age, as seen in our patient.
& o' Z* M' ^- n) ~5 d0 W( MThe long-term effect of androgen exposure during: K- F5 h8 O1 H- N- @' k/ }
early childhood on pubertal development and final
# K1 e5 R$ {* r' }5 ~/ u& _adult height are not fully known and always remain3 P7 I" _& `1 w+ Y, v
a concern. Children treated with short-term testos-
0 z! P. m8 {1 ?2 T; bterone injection or topical androgen may exhibit some) G* Y! z7 P1 ]1 [3 S
acceleration of the skeletal maturation; however, after
( T0 O* e! G1 _, j" p8 @cessation of treatment, the rate of bone maturation
; |5 s2 u- v0 ]- t$ @ cdecelerates and gradually returns to normal.8,9% j! o0 z" l$ r7 A
There are conflicting reports and controversy
) Y: ~% E& D4 z; o' nover the effect of early androgen exposure on adult9 J6 n4 Q U A [
penile length.10,11 Some reports suggest subnormal4 n. Y, v! `9 I
adult penile length, apparently because of downreg-
0 k! R) F/ h% mulation of androgen receptor number.10,12 However,( T% n1 R0 C9 O4 r: M. d
Sutherland et al13 did not find a correlation between% ^: G, B9 R0 f" I( n
childhood testosterone exposure and reduced adult
6 {# c( j) j! i: I4 epenile length in clinical studies.
1 d3 l( ^5 F. y) G! nNonetheless, we do not believe our patient is
6 |5 P' J9 a- B" E+ ugoing to experience any of the untoward effects from
z( U% k9 ?) {; gtestosterone exposure as mentioned earlier because' c# N% E) U" s' @1 i' T+ i$ {
the exposure was not for a prolonged period of time.
8 k5 \5 Y1 A$ _- P1 E! J% n$ AAlthough the bone age was advanced at the time of
8 g" R- A5 q" Adiagnosis, the child had a normal growth velocity at
. }* _) q x M( E0 g5 v6 Zthe follow-up visit. It is hoped that his final adult
1 X" h7 R0 A6 y, I" `/ n" E1 v4 }& bheight will not be affected.
# U3 H& X+ I3 E8 C- H& L0 QAlthough rarely reported, the widespread avail-3 o$ m* k9 P0 J$ D
ability of androgen products in our society may6 w9 a% h, y+ A7 o* ^6 \
indeed cause more virilization in male or female! S, X. h) f1 F
children than one would realize. Exposure to andro-
J! }0 y {2 i# x, I" @gen products must be considered and specific ques-9 H! e! q' g9 f
tioning about the use of a testosterone product or
8 Q! j! f9 Q! w G: ogel should be asked of the family members during
# I+ J. B2 [& G7 Y* Pthe evaluation of any children who present with vir-8 @3 ?7 {" g7 T" u2 `
ilization or peripheral precocious puberty. The diag-
2 B/ V) v/ L8 o3 F9 @5 Z; R0 Unosis can be established by just a few tests and by- X6 {; I+ o! N! g4 N& @
appropriate history. The inability to obtain such a
- a+ g. H0 }; F& @1 Bhistory, or failure to ask the specific questions, may6 N2 [6 ^3 {) m7 N) f8 s+ f W
result in extensive, unnecessary, and expensive4 h' z1 b0 q6 T: w' j: d7 `* \4 A G* n
investigation. The primary care physician should be7 b! p- r/ S) d( n
aware of this fact, because most of these children
* z- s B1 h4 c" E; M0 Zmay initially present in their practice. The Physicians’
& I% \5 x8 Z9 Q/ d/ x; O9 s. RDesk Reference and package insert should also put a9 P# g. B0 E$ C. [# j: D
warning about the virilizing effect on a male or
5 Q( K: a' d% N; t* g8 Nfemale child who might come in contact with some-
2 t8 Y3 ^2 N% Eone using any of these products.
" X6 l+ M* P- s: ?0 j6 @References+ I7 A1 V! S0 e3 h) {4 J/ D+ ?
1. Styne DM. The testes: disorder of sexual differentiation9 k. k- E+ P6 J
and puberty in the male. In: Sperling MA, ed. Pediatric
% J+ I( v: S+ y _; j7 R. {Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
1 ?, O8 s) ~- o& A2002: 565-628.5 w5 P3 d. i9 d* l
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
# Z, H" N$ c! I9 d7 v9 [7 _puberty in children with tumours of the suprasellar pineal
: M4 t- Z4 d' @; G* _5 u7 M) b- Eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
) } a+ M& M* t/ m/ }Topical Testosterone Exposure / Bhowmick et al 543
. m q4 o4 S$ \7 sareas: organic central precocious puberty. Acta Paediatr.
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; K4 d0 @, ~/ |& t3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
; o' j: Y9 c3 P, m/ hPediatric Endocrinology. 4th ed. New York, NY: Marcel6 T# z( Y; D( k/ c
Dekker Inc; 2003:211-238." i! R3 J( f9 L0 a
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
- x! p7 `9 D+ V* Q3 q( ^1 X: R8 b9 ldevelopment in a two-year-old boy induced by topical
& K9 Q: c L5 S aexposure to testosterone. Pediatrics. 1999;104:e23.1 m, L! X# x0 m# e# k7 U+ k2 u
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Skeletal Development of the Hand and Wrist. 2nd ed.
( A% P, Q) \$ CStanford, CA: Stanford University Press; 1959.
0 [* e5 b! _& l }! ]6. Physicians’ Desk Reference. Androgel 1% testosterone,
* H2 C6 p' T" v4 Z6 IUnimed Pharmaceutical Inc. Montvale, NJ: Medical
) V7 l! n7 ~0 {4 ?1 IEconomics Company, Inc; 2004:3239-3241.
% Z+ K" r: q# l# R5 `, v7. Klugo RC, Cerny JC. Response of micropenis to topical
, p0 y! N8 S# K$ ltestosterone and gonadotropin. J Urol. 1978;119:. g6 w- }1 k; v
667-668.4 l, v4 G1 e$ K
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