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is a significant concern for physicians. Central4 N) k& b7 P! h' t7 k) Z% v& Q- {, p) j
precocious puberty (CPP), which is mediated0 W! H/ f% T8 {" y& R! j1 P) r
through the hypothalamic pituitary gonadal axis, has% H1 S' T4 V( P0 E: q
a higher incidence of organic central nervous system" U6 B/ B" w+ s/ h: Z
lesions in boys.1,2 Virilization in boys, as manifested
1 c* L1 C+ |+ D2 oby enlargement of the penis, development of pubic- v4 ^( j* [; q* n" B
hair, and facial acne without enlargement of testi-( `) x( q( S7 }3 _5 T* ?' l2 _
cles, suggests peripheral or pseudopuberty.1-3 We) {3 H8 M5 T6 _/ g' Y( U
report a 16-month-old boy who presented with the, Y, K2 o- `6 l) l. j! v9 Z5 ^
enlargement of the phallus and pubic hair develop-; _4 i8 x+ k8 m, y$ ?
ment without testicular enlargement, which was due1 G1 ^% z+ `6 F8 Q7 E
to the unintentional exposure to androgen gel used by
( i$ Y% ]6 G4 y& G* pthe father. The family initially concealed this infor-
$ ` W! g$ ?" ?& c8 e6 r+ bmation, resulting in an extensive work-up for this
2 U* ?. k6 \; i3 t& Wchild. Given the widespread and easy availability of0 \& Y6 v! ]4 c. y$ r# Y
testosterone gel and cream, we believe this is proba-$ w) p3 W# ] @, b
bly more common than the rare case report in the
! j, b2 O0 o9 H% Iliterature.4
q/ T' q4 K$ BPatient Report
! V( D" w; r7 n" n- sA 16-month-old white child was referred to the3 U, t" n( D9 n1 K. \
endocrine clinic by his pediatrician with the concern ^/ m- B S# o) w
of early sexual development. His mother noticed
7 I; t' ^1 f$ Y4 t: }( U: E0 \light colored pubic hair development when he was8 D2 X1 E" A8 [9 p! N* v" p$ p) W
From the 1Division of Pediatric Endocrinology, 2University of, E7 ^$ i. r H: b
South Alabama Medical Center, Mobile, Alabama.
. G P9 A+ C1 ^7 h7 H0 BAddress correspondence to: Samar K. Bhowmick, MD, FACE,
4 c% Q7 L& h: ?5 h# _! lProfessor of Pediatrics, University of South Alabama, College of
( R( m; j% e% c$ @4 T4 X' ~/ VMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
3 F; x1 E8 h; _* ?! we-mail: [email protected].
5 ]2 v9 I; M ]about 6 to 7 months old, which progressively became4 x7 ?/ z! _6 H0 I' `3 U
darker. She was also concerned about the enlarge-) s7 y% i% }8 q" f7 P
ment of his penis and frequent erections. The child
, ~1 \1 M9 _) O" k8 Awas the product of a full-term normal delivery, with
/ O$ Z/ ~0 @3 z) B4 L8 fa birth weight of 7 lb 14 oz, and birth length of
7 @! x# I9 C: {- A8 `20 inches. He was breast-fed throughout the first year: V& X* X- g$ m% ^. P) y
of life and was still receiving breast milk along with) b' w+ v: D2 j
solid food. He had no hospitalizations or surgery,
; @7 O6 X& J9 Q4 Land his psychosocial and psychomotor development' S. |. a% a$ B$ z9 z4 F. g7 o
was age appropriate.
+ P. k3 z5 }3 t4 q$ y6 b& ]9 }1 uThe family history was remarkable for the father,
. Z3 P8 E% W( @( B3 nwho was diagnosed with hypothyroidism at age 16,
5 X# a' G+ c0 w ?$ Wwhich was treated with thyroxine. The father’s) |# C9 e' y! {& z1 I c
height was 6 feet, and he went through a somewhat
$ O: G" k$ X5 b; \7 T: C0 Jearly puberty and had stopped growing by age 14.
5 A( c' x7 w0 eThe father denied taking any other medication. The3 L! k' l& f, n# i5 o
child’s mother was in good health. Her menarche$ ?: d, D2 X! L- D
was at 11 years of age, and her height was at 5 feet& k9 E. W$ A: O% k: W; e
5 inches. There was no other family history of pre-
/ r: G4 I+ g9 A6 scocious sexual development in the first-degree rela-
7 V( p0 H4 \' G5 `% p K# s+ p0 ntives. There were no siblings. W v4 f' ?, m
Physical Examination7 V3 F( M2 W0 W1 f9 F. ^: R
The physical examination revealed a very active,
. o1 {* M$ z" R; s( oplayful, and healthy boy. The vital signs documented. N) d# Z4 p/ R
a blood pressure of 85/50 mm Hg, his length was
8 k A. y/ }1 T5 _, D# D) ? p90 cm (>97th percentile), and his weight was 14.4 kg' r0 e- L* V A( `/ d
(also >97th percentile). The observed yearly growth
b, c5 j/ s0 w$ A0 Y5 Mvelocity was 30 cm (12 inches). The examination of, i4 P" _' }1 d
the neck revealed no thyroid enlargement., p9 t! m! G; Y
The genitourinary examination was remarkable for/ `/ ], u! q4 u! C+ C( B2 @
enlargement of the penis, with a stretched length of
$ E; ?9 c5 ^, j3 i# @' \/ O8 cm and a width of 2 cm. The glans penis was very well$ Y7 ^0 d2 B% ^9 O' C
developed. The pubic hair was Tanner II, mostly around/ e: [. S! s! }$ e. q7 V
540
' `+ ~" I9 g5 Yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! w) B- }4 B5 i: J! _
the base of the phallus and was dark and curled. The0 a' N- R2 }" L' c' \7 U" w
testicular volume was prepubertal at 2 mL each.
2 u. V5 P- `+ G' y* T' sThe skin was moist and smooth and somewhat. s% S8 {+ G( c# a6 r2 N
oily. No axillary hair was noted. There were no! r0 z+ A# b/ }$ _+ M& W6 k
abnormal skin pigmentations or café-au-lait spots.
: s0 r+ P1 Q; R- M% ^/ @7 J- tNeurologic evaluation showed deep tendon reflex 2+: I' k! P5 R+ ?. y
bilateral and symmetrical. There was no suggestion
( I! e5 n5 S6 t% ^of papilledema.0 W4 ?3 T& d; L; Z* R
Laboratory Evaluation
" x w4 F7 ^2 \, L, B7 F( ]) i) LThe bone age was consistent with 28 months by) ~' s" Q- `. C
using the standard of Greulich and Pyle at a chrono-
8 K. _* Z5 _9 V4 Blogic age of 16 months (advanced).5 Chromosomal
1 c, E8 e$ n! _1 g$ y5 a& akaryotype was 46XY. The thyroid function test6 P6 M$ i5 s) w/ H9 N$ l
showed a free T4 of 1.69 ng/dL, and thyroid stimu-. R k$ u! w, \
lating hormone level was 1.3 µIU/mL (both normal).1 c8 ?* c. R2 ^
The concentrations of serum electrolytes, blood
2 B: w4 }1 Z `9 M m# D9 Furea nitrogen, creatinine, and calcium all were
9 |' B- R( r1 g% A8 r; Rwithin normal range for his age. The concentration
* Z/ C3 F2 }1 bof serum 17-hydroxyprogesterone was 16 ng/dL
! F! `) {3 y+ Z% u- s' S1 C, S(normal, 3 to 90 ng/dL), androstenedione was 200 }% L" q0 p3 `( c& z; _
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-3 ?! | B Q y6 K* d- p: e" }
terone was 38 ng/dL (normal, 50 to 760 ng/dL),3 s! {; H, o0 _5 E3 v
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
- T4 ]+ ]. P, p2 C. z, w49ng/dL), 11-desoxycortisol (specific compound S)5 L* x c8 b' h' M) v
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-' ]( i- i0 r& o0 F; @
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total% m( E* k6 ^% Q
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),2 b) k) p2 _6 r ]5 x1 T: V9 X
and β-human chorionic gonadotropin was less than
' Z% R7 A `& h' D9 ^ \. y+ s5 mIU/mL (normal <5 mIU/mL). Serum follicular6 Z+ U) ~$ K- K- ^; J
stimulating hormone and leuteinizing hormone
& W1 ?- |5 I: m2 ]) {: uconcentrations were less than 0.05 mIU/mL! D2 v( J, e& r8 J% U
(prepubertal).) r! T' D0 ~" I6 T6 [& l: w
The parents were notified about the laboratory
& |, M9 T% w& N) s; E/ v$ Presults and were informed that all of the tests were% ]% z* N2 a5 z
normal except the testosterone level was high. The9 D; z5 h, r3 u$ ^
follow-up visit was arranged within a few weeks to! r# Q9 E: x+ w" @0 G3 N7 `6 w: u
obtain testicular and abdominal sonograms; how-
7 N; o. C* ~7 ]. W! \/ @- fever, the family did not return for 4 months.1 Q; L# c. ^2 F. _. R' W# Q
Physical examination at this time revealed that the
4 n2 z* L7 A6 v0 U" ]child had grown 2.5 cm in 4 months and had gained% M7 v; ]; v K3 D& |1 v1 r( l
2 kg of weight. Physical examination remained! x/ H1 B8 O- p _$ ]8 j/ E3 o
unchanged. Surprisingly, the pubic hair almost com-4 }' o4 t$ [2 O: U
pletely disappeared except for a few vellous hairs at, c& f/ k9 C* _& ?1 V7 w
the base of the phallus. Testicular volume was still 27 s8 z7 e3 N$ ^) | J/ o# b
mL, and the size of the penis remained unchanged.8 x. D9 M1 A5 I; _( Y8 V9 \
The mother also said that the boy was no longer hav-: J) N; \6 W% f2 k0 a- Y9 Q) t
ing frequent erections.; J2 n6 S4 ?. m. u, x2 f! w: }5 p, U
Both parents were again questioned about use of
/ z, B4 _/ }3 s8 f$ X& B0 w. Yany ointment/creams that they may have applied to
2 |9 P, ~- q7 Y9 dthe child’s skin. This time the father admitted the/ e% k8 J8 ^; J* _- d) j+ J$ ~
Topical Testosterone Exposure / Bhowmick et al 5414 F/ `( }+ Y) y& ?, ]% i3 F: p
use of testosterone gel twice daily that he was apply-1 P ^+ o' V" L% {, A+ L
ing over his own shoulders, chest, and back area for% G4 y& a0 y/ H% D
a year. The father also revealed he was embarrassed
. W' a. @' N6 T, d- L8 F0 j! Mto disclose that he was using a testosterone gel pre-' X, V+ E% Q( ?' |, w& a
scribed by his family physician for decreased libido
" I, w3 j; M7 W, vsecondary to depression.
! E4 [! F# N7 n) H/ h. t8 b1 R: cThe child slept in the same bed with parents.
) @, `) A1 s% Z ^The father would hug the baby and hold him on his8 X w& m8 Y# ^. K7 f
chest for a considerable period of time, causing sig- S0 M k9 F1 r2 h
nificant bare skin contact between baby and father.) _8 _7 L, _9 L k
The father also admitted that after the phone call,* M6 P/ U1 {" H/ ^, W
when he learned the testosterone level in the baby1 {, X* I" h( i! [3 Y* l" S
was high, he then read the product information
z, s5 C/ O0 Y8 R' t4 T* [packet and concluded that it was most likely the rea-& f3 }% ]# O# @
son for the child’s virilization. At that time, they, A. ~" X( \/ Z$ V' w
decided to put the baby in a separate bed, and the" z; j8 L3 B' ~
father was not hugging him with bare skin and had3 R6 S; t9 A! C _- o
been using protective clothing. A repeat testosterone. D4 u+ f( v/ q' ]8 ]& D
test was ordered, but the family did not go to the
: w# q4 Q# L Flaboratory to obtain the test.
, M& H& {! e+ l" g" _: x7 Z; {Discussion6 m* L3 A9 f3 g7 W
Precocious puberty in boys is defined as secondary
2 A( Y$ b' ~ V3 ^% ~. G A) xsexual development before 9 years of age.1,44 L- }/ X1 B; N# I
Precocious puberty is termed as central (true) when
2 X) u1 w( t, d+ y2 eit is caused by the premature activation of hypo-2 U; F5 {+ G. p4 R W1 x
thalamic pituitary gonadal axis. CPP is more com-. b @9 b5 \. A; b$ j
mon in girls than in boys.1,3 Most boys with CPP
/ Y* M/ s) Z# t/ imay have a central nervous system lesion that is0 L: Q+ H5 L! @6 \0 d
responsible for the early activation of the hypothal-
; U& H o$ H p# Lamic pituitary gonadal axis.1-3 Thus, greater empha-2 e2 w5 j) G. `5 R
sis has been given to neuroradiologic imaging in
9 T* F9 w6 j5 k4 A3 y9 w- b, A0 |boys with precocious puberty. In addition to viril-
0 ^# s5 i, w$ N! {/ Z U$ Y; kization, the clinical hallmark of CPP is the symmet-
& l. O, ^% _ w) r+ C$ z* lrical testicular growth secondary to stimulation by$ z/ I2 q% y6 R) N. T0 g
gonadotropins.1,3
1 l& ]( t a$ h2 U2 ]Gonadotropin-independent peripheral preco-( p T1 `8 l6 ^: V3 o- k3 _; ^- C; f; s
cious puberty in boys also results from inappropriate! N, `" t) p; `9 q1 J3 A
androgenic stimulation from either endogenous or' p/ Z6 f7 Q8 Y3 V! E( |- q, x" v
exogenous sources, nonpituitary gonadotropin stim-
% p! j- H9 K B* Uulation, and rare activating mutations.3 Virilizing
* u7 x J2 {! l ^' n! Ucongenital adrenal hyperplasia producing excessive% w1 n. P: l5 s4 v3 u/ Z3 ?! R
adrenal androgens is a common cause of precocious- a, Y! o7 f* ^* M4 q
puberty in boys.3,4
) `0 V& k6 d8 X* p( r7 SThe most common form of congenital adrenal
; p2 |; [$ L8 w" r8 X0 o* lhyperplasia is the 21-hydroxylase enzyme deficiency.
3 ~5 C; g8 d8 J, aThe 11-β hydroxylase deficiency may also result in+ X2 c. X2 S' a6 x7 t3 s( Z
excessive adrenal androgen production, and rarely,5 x9 C+ P8 h1 v! D0 C, O3 n& w
an adrenal tumor may also cause adrenal androgen
# S% z y# N: A4 z! Pexcess.1,3
) j+ `( I* K4 {$ r: S: Uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* R4 L: T/ v! [, e
542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 w3 C. S/ A5 B: n/ u; z! N4 e1 t
A unique entity of male-limited gonadotropin-
6 m3 `' y7 e" D% I; u8 j5 Vindependent precocious puberty, which is also known/ B, N2 @* L3 c. e" T2 G0 S
as testotoxicosis, may cause precocious puberty at a1 h0 F$ G1 m @# ]9 z6 r; U
very young age. The physical findings in these boys
! M, ?; ]/ J' t R" W9 U Q# Uwith this disorder are full pubertal development,
- z8 f, V, l! mincluding bilateral testicular growth, similar to boys8 Y e7 t" \% ^2 }3 C& i3 n
with CPP. The gonadotropin levels in this disorder
4 ^' |* {4 _1 Sare suppressed to prepubertal levels and do not show
! l2 e9 q7 E" p" rpubertal response of gonadotropin after gonadotropin-
# R* a* b7 N& R' m2 {releasing hormone stimulation. This is a sex-linked
6 }. v2 f; \6 F* @- zautosomal dominant disorder that affects only2 {$ F( L6 ~- P1 o/ `) ~& F: n+ I
males; therefore, other male members of the family
1 {, |" O0 R, K. A& D# Gmay have similar precocious puberty.3% l- y( c% J$ r% D9 I9 h
In our patient, physical examination was incon-! _ r' v! t3 a& H
sistent with true precocious puberty since his testi-3 \8 u+ V; ^0 B' x
cles were prepubertal in size. However, testotoxicosis
3 x C' `7 X+ U0 I1 ^was in the differential diagnosis because his father
; k! ?4 ]1 O6 |, z9 L1 @started puberty somewhat early, and occasionally,
( F8 G9 u' x2 k$ q% mtesticular enlargement is not that evident in the
) f W1 [! w _& P- V u+ Jbeginning of this process.1 In the absence of a neg-
) W7 s0 c; |* i( q2 |5 U, j6 vative initial history of androgen exposure, our
1 a: R8 c* A( p/ f6 U& h9 ]; ibiggest concern was virilizing adrenal hyperplasia,
- O" m1 v# D- H+ N" q8 L5 J" K6 G- H6 veither 21-hydroxylase deficiency or 11-β hydroxylase
- C; B' k* e+ adeficiency. Those diagnoses were excluded by find-
1 @2 R' s N- y( Eing the normal level of adrenal steroids.8 h% O" s! o" b2 b6 t
The diagnosis of exogenous androgens was strongly7 a& c. z8 V7 M5 n( t; M* v
suspected in a follow-up visit after 4 months because' E- w! N% H- y. E3 F7 C% M0 O
the physical examination revealed the complete disap-: H$ ~! y* X+ K/ Z
pearance of pubic hair, normal growth velocity, and
6 s% @: X6 @; z: Q; sdecreased erections. The father admitted using a testos-0 ~9 m% m, r6 J4 r$ [
terone gel, which he concealed at first visit. He was- I+ c3 `1 \2 ~% G8 ]: |/ _# s
using it rather frequently, twice a day. The Physicians’, a9 v- A0 U7 b3 ?& E" \' s
Desk Reference, or package insert of this product, gel or
* `0 a4 I9 p4 D8 S N" icream, cautions about dermal testosterone transfer to) ^* S( l/ ?, m# n5 i
unprotected females through direct skin exposure.
[* a J) ]% h% Y% qSerum testosterone level was found to be 2 times the
5 x# |1 K8 M: S. G5 |+ Z: k; Fbaseline value in those females who were exposed to
, z. E8 ~$ t. Qeven 15 minutes of direct skin contact with their male
6 q/ C4 O d P4 R9 D, t/ Upartners.6 However, when a shirt covered the applica-" N" {$ d0 I- M# B0 s1 Z; Q/ D
tion site, this testosterone transfer was prevented.
( D) H0 g _. G6 {/ x- EOur patient’s testosterone level was 60 ng/mL,6 q9 [$ k2 _: {2 a/ G
which was clearly high. Some studies suggest that
+ i( o# @* R7 B# gdermal conversion of testosterone to dihydrotestos-
# f6 b+ l5 B6 O' vterone, which is a more potent metabolite, is more
0 B. I7 R! q3 n ~& ^) uactive in young children exposed to testosterone
' ^& Y. k- v/ w d, z0 f: f" dexogenously7; however, we did not measure a dihy-+ W4 _8 n- Z4 D% E% ~+ a
drotestosterone level in our patient. In addition to- @0 x! w5 n6 Z% q% `: l; u; M
virilization, exposure to exogenous testosterone in
' e4 K o; x8 w: m" {children results in an increase in growth velocity and9 \: v+ R' ?" F/ y: |8 A) {5 h
advanced bone age, as seen in our patient., |: C4 `& S; q, C7 o5 y+ U" y" M
The long-term effect of androgen exposure during
! L6 [0 X' `- h; Y1 ?( H4 cearly childhood on pubertal development and final
0 L6 X) Z! ]1 k$ jadult height are not fully known and always remain0 r/ l0 T7 X* m5 t
a concern. Children treated with short-term testos-
0 e( L: {% b$ M. K7 l* mterone injection or topical androgen may exhibit some
: g$ D5 G1 |7 z7 B. d7 cacceleration of the skeletal maturation; however, after
3 G* Q, N1 y8 S4 h4 Z: Bcessation of treatment, the rate of bone maturation# C8 _: R- a0 [: m* I; h
decelerates and gradually returns to normal.8,9
& G( ?# B w5 `; E7 {" ]4 u8 }4 uThere are conflicting reports and controversy
% P" T. t9 g( y( N4 p4 W5 [* }over the effect of early androgen exposure on adult [: ^4 W1 v! G9 Q$ |" _; ~: N
penile length.10,11 Some reports suggest subnormal
$ M6 T4 f, h' X- D5 R' k* q5 _/ iadult penile length, apparently because of downreg-' G4 `2 }9 q& ], @. e7 A
ulation of androgen receptor number.10,12 However, b% x; i' s O, L# \! N" H
Sutherland et al13 did not find a correlation between
. I! R2 H* c* `% ichildhood testosterone exposure and reduced adult
4 w+ V/ F4 v( Zpenile length in clinical studies.& f5 \, w' \2 A9 G
Nonetheless, we do not believe our patient is
$ X6 B/ A4 [5 o. Wgoing to experience any of the untoward effects from' c" [+ ?1 P& _" ^3 p7 h
testosterone exposure as mentioned earlier because7 U7 c" F7 l2 K1 T
the exposure was not for a prolonged period of time.+ ~; Q- N, p9 B: F
Although the bone age was advanced at the time of; ?+ _2 D8 \0 Y$ m* v
diagnosis, the child had a normal growth velocity at$ @" B7 E+ Z1 e6 M
the follow-up visit. It is hoped that his final adult' N* C1 l% C( ?9 G3 j& U: J
height will not be affected./ p1 A, c- E F) P6 H- S+ d
Although rarely reported, the widespread avail-9 P8 j! j8 D! Y1 ]
ability of androgen products in our society may
6 X4 P: P0 M5 B3 [8 ^1 u% |5 |. `indeed cause more virilization in male or female! `2 ]5 i: @, H
children than one would realize. Exposure to andro-
1 j a% I% _: G" }; d" Sgen products must be considered and specific ques-
8 x ?+ G, X6 L6 }tioning about the use of a testosterone product or1 X! g) ~4 x) [0 K; b0 p( z
gel should be asked of the family members during% e6 y U% @- i8 r
the evaluation of any children who present with vir-+ K+ {# r3 j/ f+ ^" [6 L) B
ilization or peripheral precocious puberty. The diag-
4 @( }' d# @+ C- G" L5 q' ?- unosis can be established by just a few tests and by
) y) Z5 T, F! v& a: Oappropriate history. The inability to obtain such a
( X6 J0 s- M: f5 ?3 d! zhistory, or failure to ask the specific questions, may: @3 V; W% O+ _4 ]2 q! \, t# }+ V
result in extensive, unnecessary, and expensive
. u6 `( K2 d# Y2 R/ linvestigation. The primary care physician should be
" B. ?' V) {0 g8 ]' @aware of this fact, because most of these children
7 S z- U$ L! [. o8 ?' Vmay initially present in their practice. The Physicians’" O& j7 d C8 @2 |
Desk Reference and package insert should also put a
# V3 S: F4 H. M1 Swarning about the virilizing effect on a male or, ?: H- Z% Y. _' e
female child who might come in contact with some-
) ^7 `/ T6 P# p' o, p( Jone using any of these products.
" E4 z6 \& _: E% {) nReferences
, s# {) G6 x) Q& d' K* b1. Styne DM. The testes: disorder of sexual differentiation
( G' A$ L- c/ f( ?- mand puberty in the male. In: Sperling MA, ed. Pediatric1 r( V0 a, O, m: k9 j; ]9 m B
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
! F0 g. o" j3 t! H1 H/ ^# ?9 j' k2002: 565-628.1 s5 ~) w7 \) v0 K
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious! ~4 Z3 S! {( ]% k# u. p, @
puberty in children with tumours of the suprasellar pineal7 G$ @. M4 P( e% k2 m% l) G
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 S5 f9 H' o- L. p& o; m3 f9 h% k6 m
Topical Testosterone Exposure / Bhowmick et al 543! ~4 ?3 Y9 x6 W, G
areas: organic central precocious puberty. Acta Paediatr.
6 E3 F v, f/ z# f/ q5 D. L2001;90:751-756.
# a! W2 s L, c3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed. c% a* u# Z( ~7 E
Pediatric Endocrinology. 4th ed. New York, NY: Marcel1 w+ d) E- h' [8 h1 p- G1 A) l
Dekker Inc; 2003:211-238.
- h' v# n( P& x! s# t4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual. _* d1 y: _) ]3 \! R! v! ^9 ~
development in a two-year-old boy induced by topical
: @8 r: M1 Y1 s/ d+ i! j8 @exposure to testosterone. Pediatrics. 1999;104:e23.
- N9 F8 y( ?3 B0 b0 J5. Greulich WW, Pyle SI, eds. Radiographic Atlas of9 O3 @/ D: |/ q8 o% f
Skeletal Development of the Hand and Wrist. 2nd ed.+ f7 l9 _+ d4 Q% k$ K5 ~+ Y
Stanford, CA: Stanford University Press; 1959.6 @1 J3 z% M4 |6 a e
6. Physicians’ Desk Reference. Androgel 1% testosterone,
! i% \5 J( _ I7 Q8 A% HUnimed Pharmaceutical Inc. Montvale, NJ: Medical5 A/ ~! x3 n6 A& n+ X' D2 M9 `
Economics Company, Inc; 2004:3239-3241.: L; q8 b; A4 Z7 X* H
7. Klugo RC, Cerny JC. Response of micropenis to topical- h; w' M5 n A5 x* F/ }$ V- k/ J
testosterone and gonadotropin. J Urol. 1978;119:
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