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is a significant concern for physicians. Central+ D, t" \( A/ v, k) K3 Y* P
precocious puberty (CPP), which is mediated
) ?. z+ w E$ `- C0 lthrough the hypothalamic pituitary gonadal axis, has& L6 ]- U2 A! D
a higher incidence of organic central nervous system2 c$ W8 `9 Z2 ^- v
lesions in boys.1,2 Virilization in boys, as manifested
3 M1 T% T4 S; }by enlargement of the penis, development of pubic
6 K0 k. J, O% q `hair, and facial acne without enlargement of testi-
4 f# y4 @( l/ H# Lcles, suggests peripheral or pseudopuberty.1-3 We& W- J) M( i' z' t! d" T
report a 16-month-old boy who presented with the
; S7 A, h8 G a7 I, C! S2 benlargement of the phallus and pubic hair develop-% K, Z# j* _ `* i! u
ment without testicular enlargement, which was due- u- V& y( ~4 E) V
to the unintentional exposure to androgen gel used by
8 Y: F9 ^2 R% \2 z: W" Ithe father. The family initially concealed this infor-# m; \! U$ h9 v; E0 X6 q
mation, resulting in an extensive work-up for this
9 h$ W: o: ?6 I4 m; ychild. Given the widespread and easy availability of
4 \( r* }* S3 |/ @- [' Atestosterone gel and cream, we believe this is proba-# c' _& z' g8 O2 Y" B8 d6 H
bly more common than the rare case report in the
2 O. A1 X0 e, Q; M2 i0 Dliterature.4
, g+ D% n7 {, s0 T" v1 P- y0 }* e( FPatient Report
8 w- i2 o7 L, K& A8 qA 16-month-old white child was referred to the
8 S0 @6 H# ]7 Cendocrine clinic by his pediatrician with the concern g$ M. D) z* g* }- H# X
of early sexual development. His mother noticed( f/ \& A+ q9 i, h* W8 n
light colored pubic hair development when he was
; p$ W0 A8 |# oFrom the 1Division of Pediatric Endocrinology, 2University of# u) y3 Z7 w' O7 {+ D
South Alabama Medical Center, Mobile, Alabama.
. U x" y8 f5 M" c( p GAddress correspondence to: Samar K. Bhowmick, MD, FACE,# O4 E2 n2 }) r7 f
Professor of Pediatrics, University of South Alabama, College of
; G9 w, G. B0 J& Q- LMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;( n2 b; P" V0 D5 H- }
e-mail: [email protected].
; n. D( x* |/ p. s, R4 S. N! _about 6 to 7 months old, which progressively became
. d4 ^7 O4 r, B1 J* ]) E8 i4 Ddarker. She was also concerned about the enlarge-
; C9 v1 M% H8 x3 f& Yment of his penis and frequent erections. The child8 U7 A3 B& u7 M" Z! G
was the product of a full-term normal delivery, with
& R- E& n' r! ma birth weight of 7 lb 14 oz, and birth length of
- H- x$ d. A. V2 [2 r+ o; u20 inches. He was breast-fed throughout the first year
. t0 I$ x( t9 `) J% E" Nof life and was still receiving breast milk along with& \% K0 N! c! }0 J7 o1 E- q
solid food. He had no hospitalizations or surgery," `# `) O1 Y9 Y- f7 y
and his psychosocial and psychomotor development" m$ Q. C4 `% p$ L+ ?4 c; Z
was age appropriate.
- ?9 P# `) P) ?2 L- v( y* cThe family history was remarkable for the father,/ o; \: C; j' W7 Z, w) d! w
who was diagnosed with hypothyroidism at age 16,
O( I9 p1 E+ s8 Ewhich was treated with thyroxine. The father’s9 o% t0 f; G B4 I3 a
height was 6 feet, and he went through a somewhat, [5 K1 v3 z5 O, ]% L9 U b
early puberty and had stopped growing by age 14.# ~/ o0 _# e) i5 u Q3 z1 k
The father denied taking any other medication. The# @" w8 d0 Z' E: M- [) b4 f
child’s mother was in good health. Her menarche
, H- f# f" g# o& v* V- }7 \was at 11 years of age, and her height was at 5 feet* F: ^! S! k) W) ^# b
5 inches. There was no other family history of pre-
7 p; A8 h/ M$ e8 N2 wcocious sexual development in the first-degree rela-
9 I2 Y; C/ v7 U) ]! Qtives. There were no siblings.
0 o. O+ \7 Z" q9 B7 pPhysical Examination. n2 U) i. i9 ]" z$ |9 T/ M3 w3 |
The physical examination revealed a very active,
2 ~; O' }4 A- Q6 A: Gplayful, and healthy boy. The vital signs documented! ^+ E) X/ c4 o7 m1 ?6 o
a blood pressure of 85/50 mm Hg, his length was
8 P) u* R" G O3 I90 cm (>97th percentile), and his weight was 14.4 kg! ^# X0 w+ _1 {# c1 O8 S: l
(also >97th percentile). The observed yearly growth' V& F2 L3 c4 X8 Z7 K
velocity was 30 cm (12 inches). The examination of4 i3 n/ y, L& W7 T
the neck revealed no thyroid enlargement.
* e) ]/ N5 }( v5 ~- [! iThe genitourinary examination was remarkable for
6 N, \& s. t% x, E% f. \enlargement of the penis, with a stretched length of
/ I4 O% S0 ~8 e/ Q8 cm and a width of 2 cm. The glans penis was very well
6 E& L5 ?+ o' wdeveloped. The pubic hair was Tanner II, mostly around
7 G& q9 ^6 b5 w" b4 |( k" y: J$ C540
( p: j4 ]% V8 W& w* H& @at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
. g4 K4 z" L7 [( C6 I4 V" R3 _the base of the phallus and was dark and curled. The
5 n9 j: x; }% G! Y( q6 w7 ?$ Ptesticular volume was prepubertal at 2 mL each.: t# p8 T J( S# l7 h3 C5 c
The skin was moist and smooth and somewhat
, Z: F# g5 l- S/ b2 H! N7 Z! R# yoily. No axillary hair was noted. There were no
$ t5 T! s% e9 [8 J* {* ]* Aabnormal skin pigmentations or café-au-lait spots.
2 D( R* ^+ j1 H* bNeurologic evaluation showed deep tendon reflex 2+
& ?' j" E9 y* b! S8 B) b4 Wbilateral and symmetrical. There was no suggestion/ v- g/ ^. f5 L3 ~ q) H/ _
of papilledema.6 e# s+ ?" [5 \& Q$ l7 u
Laboratory Evaluation
" C# ^0 D& r7 LThe bone age was consistent with 28 months by( d( P7 l8 G5 i! n9 X$ C2 E* J
using the standard of Greulich and Pyle at a chrono-3 k! G$ U) s5 u
logic age of 16 months (advanced).5 Chromosomal
$ d: ?' N% C1 N6 A& Ukaryotype was 46XY. The thyroid function test% z- A9 O# ~& r( S4 \
showed a free T4 of 1.69 ng/dL, and thyroid stimu-! Q# P% l, e. q; q
lating hormone level was 1.3 µIU/mL (both normal).0 u+ s- k( z, f$ h7 c" g3 P
The concentrations of serum electrolytes, blood8 j: D, F; c# ^
urea nitrogen, creatinine, and calcium all were
/ y+ m: y3 `0 w7 ]# k, L# vwithin normal range for his age. The concentration, N7 A* Z# l) ?: q3 |% w; d
of serum 17-hydroxyprogesterone was 16 ng/dL
0 s' b6 I8 n4 R4 e3 W(normal, 3 to 90 ng/dL), androstenedione was 20
) }8 q; ~+ a5 W" \( z! b4 w+ U, Xng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-% _4 Q; L, d5 f. ^0 x& b
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
1 v5 D! N" [ q9 ~$ x( e/ Odesoxycorticosterone was 4.3 ng/dL (normal, 7 to$ ^! y+ k4 v7 u8 \$ [
49ng/dL), 11-desoxycortisol (specific compound S)
/ E. t0 V" Q, ?, ?was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-: {3 O$ n7 ^+ D
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total* @2 |; s1 i; s2 ]8 E5 C, b$ F/ L
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
7 u" `7 Q* H5 u( C: c4 D$ W* xand β-human chorionic gonadotropin was less than6 N5 W8 `0 f9 x1 V3 B! i" F4 l
5 mIU/mL (normal <5 mIU/mL). Serum follicular N8 i0 u. J3 }( z# M# |4 q6 y: Q
stimulating hormone and leuteinizing hormone
5 e ]( [9 [. d- e' i6 econcentrations were less than 0.05 mIU/mL
5 V- i0 V7 `" w6 t. B(prepubertal)./ D- H% r3 v! I+ j* T# v* W
The parents were notified about the laboratory' ?8 \3 r2 Z+ u. l" V; @" s
results and were informed that all of the tests were% g$ V% D5 c& y' t
normal except the testosterone level was high. The
t' Y% n- J, T5 Gfollow-up visit was arranged within a few weeks to5 q) \. o7 l% @$ y- o
obtain testicular and abdominal sonograms; how-7 l2 u/ C6 X+ X9 F: s' m. E
ever, the family did not return for 4 months.
8 Q9 ] M, U' N; e1 K; aPhysical examination at this time revealed that the% U6 {% f5 D8 X$ M. L$ H8 @
child had grown 2.5 cm in 4 months and had gained3 G+ z! D* \# G0 y3 W$ Z
2 kg of weight. Physical examination remained
7 `9 D- `0 X/ J, a( l+ a1 xunchanged. Surprisingly, the pubic hair almost com-% e, {: M* y. N/ N' r
pletely disappeared except for a few vellous hairs at m. ?; @8 I M+ O
the base of the phallus. Testicular volume was still 2
' K7 G% r: P$ GmL, and the size of the penis remained unchanged.8 v% w, s% ]) U7 `& M: K1 D
The mother also said that the boy was no longer hav-
) Q& E3 d6 |1 {ing frequent erections.' z$ g4 s! R( m2 a2 Q6 k3 R5 ?
Both parents were again questioned about use of
& @+ {8 T# v; p. J9 v! I, G% oany ointment/creams that they may have applied to
- o* V4 Q! u9 pthe child’s skin. This time the father admitted the
0 x9 K# B9 }, T2 m3 p. ~Topical Testosterone Exposure / Bhowmick et al 541
5 [: @5 R0 i; \0 t! C" ]& Suse of testosterone gel twice daily that he was apply-
& u. M1 \" H: D _ o5 ]ing over his own shoulders, chest, and back area for
5 n" E) I i4 P6 h/ @a year. The father also revealed he was embarrassed
9 O# k" K$ c# Ato disclose that he was using a testosterone gel pre-9 X. y3 y9 Y0 \) H% n& Z
scribed by his family physician for decreased libido
9 r# S! n. C% }1 H6 B. b7 rsecondary to depression.
) Y& a% g5 }: ^5 I4 Q$ O5 TThe child slept in the same bed with parents.$ D% P+ `4 S1 t+ S2 U
The father would hug the baby and hold him on his3 r( X, g8 h) e7 a0 N6 B
chest for a considerable period of time, causing sig-6 x1 z5 H! `5 o% I
nificant bare skin contact between baby and father.
0 \9 b0 q8 w; D3 TThe father also admitted that after the phone call,
! |% Z5 ~; s* b+ o( S0 uwhen he learned the testosterone level in the baby
( O I0 |9 N6 o2 [& K& O5 h5 jwas high, he then read the product information8 h- V) g$ b: t+ P7 l' N
packet and concluded that it was most likely the rea-1 D1 ^* \6 w1 P+ l6 K; `
son for the child’s virilization. At that time, they( h+ N& t1 n% a
decided to put the baby in a separate bed, and the3 B8 w: a9 z# X: o( K
father was not hugging him with bare skin and had+ D7 M0 C4 W, G
been using protective clothing. A repeat testosterone
+ V8 n. }1 Z/ u* _; J* c% {. j9 Utest was ordered, but the family did not go to the
2 p7 i0 s3 l, N% C( _' x3 Ilaboratory to obtain the test.2 M6 \- x" s4 S0 ]
Discussion [( i; x: O4 @0 Q: V: @
Precocious puberty in boys is defined as secondary
0 F# Z" i e8 a! K9 A+ Ysexual development before 9 years of age.1,4; @% h* e) o3 f; O# o9 T+ O
Precocious puberty is termed as central (true) when; q. W% [' ~1 i; L( |
it is caused by the premature activation of hypo-
) ~2 h: h# U' }7 W. P8 Kthalamic pituitary gonadal axis. CPP is more com-
) Q' c: l3 C. E0 ]. _3 `/ ] Hmon in girls than in boys.1,3 Most boys with CPP) c8 t( K, b' |/ _1 r
may have a central nervous system lesion that is( f3 K8 @; j( G/ s7 J6 v7 r8 K O
responsible for the early activation of the hypothal-1 V: d& |/ @1 \# p9 d" T+ M- U
amic pituitary gonadal axis.1-3 Thus, greater empha-
" @$ l( V% L& nsis has been given to neuroradiologic imaging in
. r2 G6 C& _. G. x9 F1 gboys with precocious puberty. In addition to viril-2 F9 {, r( J F, o! X
ization, the clinical hallmark of CPP is the symmet-0 g. C! P; w$ u& V1 `* S3 d8 e
rical testicular growth secondary to stimulation by
7 `3 z0 y6 o- k& Wgonadotropins.1,3
' c% a1 p' W! H- U6 ?+ o0 QGonadotropin-independent peripheral preco-
- l+ k+ m# r/ R/ jcious puberty in boys also results from inappropriate
8 g/ C4 g$ A% \androgenic stimulation from either endogenous or
; S6 M& O' [) n( ^6 k/ uexogenous sources, nonpituitary gonadotropin stim-
. g% b( N4 d" D3 M7 c- Aulation, and rare activating mutations.3 Virilizing
1 p7 ]& V/ ]. [# d1 ?8 ]" ] U2 jcongenital adrenal hyperplasia producing excessive4 F$ ` ?4 q, n8 w
adrenal androgens is a common cause of precocious
9 R, B5 g7 T$ p% f6 {: i4 @: Gpuberty in boys.3,4
" f5 k* ^* f% Y( kThe most common form of congenital adrenal
& Q$ V9 r1 Z2 l% [hyperplasia is the 21-hydroxylase enzyme deficiency.
. z; V. n% j# }) z7 BThe 11-β hydroxylase deficiency may also result in) ~! M* U N9 V/ {! M) t" j- A- c W
excessive adrenal androgen production, and rarely,6 U1 S; j, g) z' [7 ?0 k
an adrenal tumor may also cause adrenal androgen" ?3 ?( ~' o# ?
excess.1,3, k9 L4 G! F' C# w
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from0 m5 ^: {1 E F% P: X) \
542 Clinical Pediatrics / Vol. 46, No. 6, July 20070 k; i/ B* N. [1 {
A unique entity of male-limited gonadotropin-7 t- E& d" O: x3 q% ~4 p# f
independent precocious puberty, which is also known! c* |! P' U/ e! q4 z6 m# s
as testotoxicosis, may cause precocious puberty at a6 ^: ?# F* L0 s$ \- }
very young age. The physical findings in these boys
: t" `% B$ R3 H$ lwith this disorder are full pubertal development,' o& q( x) @# g" `$ K9 P5 A
including bilateral testicular growth, similar to boys+ u0 O& l h L% k0 b C% k( u2 V
with CPP. The gonadotropin levels in this disorder# X8 _" a) f1 N) |9 u: Y
are suppressed to prepubertal levels and do not show
1 g: P. u" [. f0 U: Z2 T" i9 gpubertal response of gonadotropin after gonadotropin-
1 H- K3 ^( t% _releasing hormone stimulation. This is a sex-linked; M, U- \3 e6 W' p$ W
autosomal dominant disorder that affects only
, t w( m; U9 ^0 a6 m0 G7 qmales; therefore, other male members of the family" D/ z6 V5 G6 s( k2 ~4 |8 Y
may have similar precocious puberty.3) ^. v) H0 E: w, h
In our patient, physical examination was incon-
3 N. F9 {6 S/ t1 P w+ L; Hsistent with true precocious puberty since his testi-' g* g: G, h, T, l. w0 _9 p3 B: e/ h' V
cles were prepubertal in size. However, testotoxicosis1 b2 A' |9 p# ~; o3 G, T8 B
was in the differential diagnosis because his father [# H: J; R& B
started puberty somewhat early, and occasionally,6 v4 i; ]" w6 j9 j% s& }- |
testicular enlargement is not that evident in the
' [( q6 H* n4 h8 O8 M9 }beginning of this process.1 In the absence of a neg-. }1 J; ]0 H4 [; ]6 S
ative initial history of androgen exposure, our
; C( h9 O7 w: abiggest concern was virilizing adrenal hyperplasia,
& [. j# y9 ]' G/ Aeither 21-hydroxylase deficiency or 11-β hydroxylase8 T3 w4 C4 |' v) s$ u8 J
deficiency. Those diagnoses were excluded by find-: ~( ?0 C* M6 |
ing the normal level of adrenal steroids.
" Y/ L! W+ [/ R [& HThe diagnosis of exogenous androgens was strongly6 L9 g4 d" x0 @( ?
suspected in a follow-up visit after 4 months because( \7 `4 O: a* X; F
the physical examination revealed the complete disap-
' F) h( `& B- O3 v5 G" hpearance of pubic hair, normal growth velocity, and/ Q. O) U" y8 ^) V0 L, F n7 N
decreased erections. The father admitted using a testos-8 s% U F6 ]5 j, b7 @
terone gel, which he concealed at first visit. He was( \, h$ w6 K' z
using it rather frequently, twice a day. The Physicians’
5 w* A# _6 E3 jDesk Reference, or package insert of this product, gel or+ E$ l2 D8 O$ p5 r+ _- q
cream, cautions about dermal testosterone transfer to8 ~, w) `# d& |* a, n; z6 X
unprotected females through direct skin exposure.
9 l: J% t" b, Y+ R- `! T2 x USerum testosterone level was found to be 2 times the8 j5 Y4 {: S" }1 `- c: r
baseline value in those females who were exposed to5 S& d0 I- o5 u0 N5 q( N+ B
even 15 minutes of direct skin contact with their male
9 j* Q8 F, X5 b2 O2 M; Hpartners.6 However, when a shirt covered the applica-* S1 t8 v/ L9 g3 M! G8 k# t: _9 b
tion site, this testosterone transfer was prevented.
; O* f9 Q3 `" P1 Y8 h0 wOur patient’s testosterone level was 60 ng/mL,
' `; g9 m& O5 k3 E+ o, D3 @which was clearly high. Some studies suggest that
- G7 r4 j! Z& d4 O# j" qdermal conversion of testosterone to dihydrotestos-
& s0 b% ^4 G1 e6 x+ bterone, which is a more potent metabolite, is more' U" ~. D+ o' A: N3 G
active in young children exposed to testosterone4 W& r* m& M2 K) P0 A& b
exogenously7; however, we did not measure a dihy-2 U/ i) U' P2 [+ y% \/ k; `6 x
drotestosterone level in our patient. In addition to
# w7 q- E% i) s( z0 R4 p" R) h yvirilization, exposure to exogenous testosterone in
A( c6 c0 S) \8 ochildren results in an increase in growth velocity and
; c( Z3 v& X9 Y% kadvanced bone age, as seen in our patient.( S* E v8 E1 q9 G7 T+ V
The long-term effect of androgen exposure during
' _7 v7 K. A; k* S5 {$ p, x7 aearly childhood on pubertal development and final) S" L& f; T2 u( @' [
adult height are not fully known and always remain, C0 i( L7 Y* f; s* u' p+ g
a concern. Children treated with short-term testos-
' D; y% I: V+ p, ^( `5 Hterone injection or topical androgen may exhibit some6 y6 @6 R6 Y+ M+ X; G+ V! K
acceleration of the skeletal maturation; however, after
" \8 G3 v* |' m, ]; c. [5 B% U8 rcessation of treatment, the rate of bone maturation
5 o% d" ?) \; ]- zdecelerates and gradually returns to normal.8,9
5 ~' D3 g7 A, WThere are conflicting reports and controversy+ z& P% |. v( Z5 W: s" d& L9 _
over the effect of early androgen exposure on adult q. ]( X6 w5 b4 P
penile length.10,11 Some reports suggest subnormal
s* K0 S, O* p# u$ ]9 Sadult penile length, apparently because of downreg-+ p8 G% ? }2 Y3 ?7 E P
ulation of androgen receptor number.10,12 However,
4 v# W/ @5 b. m( c) tSutherland et al13 did not find a correlation between
: U! [, m' ?( m9 O5 zchildhood testosterone exposure and reduced adult
' Q+ v2 V) N' h! m! L( |penile length in clinical studies.' @/ r! _" j# N+ G& _+ z
Nonetheless, we do not believe our patient is
. T8 Y( F+ `1 I6 P4 b2 B2 F& e4 M kgoing to experience any of the untoward effects from
. ?$ f( Z3 ^+ V# i6 Vtestosterone exposure as mentioned earlier because
- v- W3 A; [; J" \6 E3 i3 f, mthe exposure was not for a prolonged period of time.
* F- v' r9 X3 ]6 l( A" ]+ ^9 I: a4 oAlthough the bone age was advanced at the time of. U- j3 ?9 M& g& c% {+ n* H
diagnosis, the child had a normal growth velocity at
& }6 d3 Q8 _0 q4 ~6 z# hthe follow-up visit. It is hoped that his final adult, N! R( z/ o( Z, C6 I+ q
height will not be affected.
) M4 K$ L2 R% C; e6 X8 ~7 [ OAlthough rarely reported, the widespread avail-; R1 J& L) g% ~7 l4 `" h
ability of androgen products in our society may
2 [: \* N) |) K* U, Findeed cause more virilization in male or female: G% a- `9 k( h
children than one would realize. Exposure to andro-0 x+ N$ N% U# A% z$ K" S3 j
gen products must be considered and specific ques-- K% b' F' {1 e$ }. A
tioning about the use of a testosterone product or
: m$ ?( w; E0 q. {1 H4 {/ a4 Ygel should be asked of the family members during
9 e8 `' x- Y& k" }& ~9 ?the evaluation of any children who present with vir-
5 V+ c p+ |8 E0 h# t. vilization or peripheral precocious puberty. The diag-
* c+ h5 `$ w5 mnosis can be established by just a few tests and by* N/ z3 A: v& m# t" F. p
appropriate history. The inability to obtain such a
% `) u; z. [9 I9 x% Z; Yhistory, or failure to ask the specific questions, may
" j5 S: ~, F" E8 W7 _result in extensive, unnecessary, and expensive
* ~6 a* Z( E. @- \/ e4 _3 W0 |. [investigation. The primary care physician should be$ `( b4 P6 y+ P% Q
aware of this fact, because most of these children
! ~7 C3 _, C5 j! Y% c+ S' g2 u" l0 Nmay initially present in their practice. The Physicians’
8 P H# s: q* mDesk Reference and package insert should also put a
0 x0 ^ O$ w8 w$ y! M @warning about the virilizing effect on a male or0 @2 M# P4 e+ v. |
female child who might come in contact with some-% A4 Q- t' \) H# P# d
one using any of these products.
8 j" m- T4 x/ s5 R4 P5 OReferences; T# T7 |4 `) T; O. z
1. Styne DM. The testes: disorder of sexual differentiation3 m+ ]. x7 b6 `, @ v
and puberty in the male. In: Sperling MA, ed. Pediatric
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2002: 565-628.3 L1 V0 b, Z2 O& |: i9 j
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious' {& @/ i7 B5 z% j
puberty in children with tumours of the suprasellar pineal: }. t( p) t2 k4 Z
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areas: organic central precocious puberty. Acta Paediatr.
. e7 s8 [' @0 c' t. L2001;90:751-756.- T8 Q* B$ c; h) n; _
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. P; O) I P% [ n6 H( e+ K5 xPediatric Endocrinology. 4th ed. New York, NY: Marcel
1 ~% u" N6 f# s0 VDekker Inc; 2003:211-238.2 g' X: e: h; Z, y5 X9 h
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1 D) Y) l2 l) U) q/ ?$ ^, vdevelopment in a two-year-old boy induced by topical/ C+ i- w+ }. k p8 p
exposure to testosterone. Pediatrics. 1999;104:e23.0 y; M2 S' K2 o& n) q: m6 v) V8 w
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
0 x/ v+ r1 |; {) nSkeletal Development of the Hand and Wrist. 2nd ed.& h9 k9 v/ ~9 y9 M! N$ v& x1 p' \
Stanford, CA: Stanford University Press; 1959.
8 {0 n8 h! m- Q, ]3 N6. Physicians’ Desk Reference. Androgel 1% testosterone,
4 E) ` S- o% [2 I# V4 OUnimed Pharmaceutical Inc. Montvale, NJ: Medical( U% z2 ]* A1 h8 E; s
Economics Company, Inc; 2004:3239-3241.5 p" d t2 m7 X1 u
7. Klugo RC, Cerny JC. Response of micropenis to topical5 g7 M. e8 P2 Q. x4 \- M
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