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is a significant concern for physicians. Central
( s4 g+ ]& M" T& uprecocious puberty (CPP), which is mediated0 h) U& @) X2 M5 b/ S
through the hypothalamic pituitary gonadal axis, has' @; n$ D6 u0 g0 A
a higher incidence of organic central nervous system$ x; I! D0 j' ^- P! [5 h; s) s
lesions in boys.1,2 Virilization in boys, as manifested* C5 @4 ~/ x& E6 T6 L" @: V
by enlargement of the penis, development of pubic! ^! J6 M( t: x" ~
hair, and facial acne without enlargement of testi-. z- P! q* \0 }, R, f* R8 k
cles, suggests peripheral or pseudopuberty.1-3 We
' V) t, e! v8 P9 O L9 yreport a 16-month-old boy who presented with the
6 }" _7 J8 l* henlargement of the phallus and pubic hair develop-
- A9 ?1 E# {5 \0 `4 p1 a7 }* oment without testicular enlargement, which was due6 W3 U' {& U% K# e
to the unintentional exposure to androgen gel used by
) A: S4 L4 ?7 ^7 U3 s* qthe father. The family initially concealed this infor-
& j5 a( L) L0 fmation, resulting in an extensive work-up for this+ `# P6 p. q! X% H
child. Given the widespread and easy availability of
& h$ {$ }; ]4 stestosterone gel and cream, we believe this is proba-
: n- j% ^- M3 [& v: D! ibly more common than the rare case report in the
' m4 B8 ]2 P( X( g8 mliterature.4
2 |8 o2 b1 |% kPatient Report
& ]: u$ Z8 B8 `2 N5 jA 16-month-old white child was referred to the8 V; b E' b! z$ {) e% E+ Z8 Z" i* E
endocrine clinic by his pediatrician with the concern* `: Q* s# F A: L* ^
of early sexual development. His mother noticed: D6 u2 C2 k: e9 m8 @) y' ?
light colored pubic hair development when he was- H( k3 @7 i( D6 t' Y
From the 1Division of Pediatric Endocrinology, 2University of. C$ [" O/ o$ G& f S. ?% v9 n- Z( ]; V1 V
South Alabama Medical Center, Mobile, Alabama.4 C- b( A4 h6 m. W y3 y
Address correspondence to: Samar K. Bhowmick, MD, FACE,
5 ?3 `% A! A' w+ yProfessor of Pediatrics, University of South Alabama, College of
, @9 F0 C" B& _) {% cMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;( I* j! z1 ]0 ?% C# r
e-mail: [email protected].0 Z6 b0 m; B2 o* h3 U
about 6 to 7 months old, which progressively became
8 T) b+ c7 g# q7 bdarker. She was also concerned about the enlarge-8 P( L, a( S3 L+ w( i; |
ment of his penis and frequent erections. The child' Q' ]5 M# q; i+ C- X: D
was the product of a full-term normal delivery, with
1 Z- i$ \- q) b( b5 E& u# x! Ra birth weight of 7 lb 14 oz, and birth length of
: q! L7 G' t# R9 u. Q20 inches. He was breast-fed throughout the first year: ^2 M! B, r+ C. x
of life and was still receiving breast milk along with
E& G) A2 n& q0 n/ P+ k1 Asolid food. He had no hospitalizations or surgery,
' e& g |5 |8 Z! K' o [and his psychosocial and psychomotor development+ r# O% Y% _) }* j2 Z2 b
was age appropriate.
- T9 R5 @- U3 l& @( V3 ]The family history was remarkable for the father, X9 J. R# [+ j( Y
who was diagnosed with hypothyroidism at age 16,
, N' T0 s- s7 `4 ?0 fwhich was treated with thyroxine. The father’s7 I$ m ]! f+ P2 o7 _5 n
height was 6 feet, and he went through a somewhat0 u1 n. g( O ?. a$ h$ R$ N
early puberty and had stopped growing by age 14.7 }( R Z/ b" E: h5 `) W$ {3 f
The father denied taking any other medication. The# U0 w; w( h. C" D2 s3 s* o( S
child’s mother was in good health. Her menarche
4 y) n9 S- V: I2 Vwas at 11 years of age, and her height was at 5 feet- m( Y2 O) Y+ S: ~" ?1 k2 X
5 inches. There was no other family history of pre-6 Z/ I/ B5 G5 P6 ]% _' p
cocious sexual development in the first-degree rela-
5 r' C$ \; K' P! ?* B) ` O; stives. There were no siblings.1 d* [: \3 s4 o7 k# R6 y6 k" i
Physical Examination
q! E1 a0 r* o! W FThe physical examination revealed a very active," ?( O$ i' W4 r, O% E( |7 N
playful, and healthy boy. The vital signs documented
) q( D$ r* d% e% u1 F) S8 G# Ma blood pressure of 85/50 mm Hg, his length was
" d3 b3 b; K2 T# ?5 M3 e90 cm (>97th percentile), and his weight was 14.4 kg* Y) R+ u* j8 l4 ]# e
(also >97th percentile). The observed yearly growth
- s2 P7 ~6 ^2 l! J- y k2 Gvelocity was 30 cm (12 inches). The examination of J+ Y3 h5 p% }' n# F
the neck revealed no thyroid enlargement.
6 K$ A$ Z0 g- ^1 _The genitourinary examination was remarkable for5 n% ]3 R7 j( Y- C9 O
enlargement of the penis, with a stretched length of: Q3 @5 r) Z0 e) ?, r+ k- @3 x/ F
8 cm and a width of 2 cm. The glans penis was very well
/ i: L$ n: E- L4 N7 o6 }1 mdeveloped. The pubic hair was Tanner II, mostly around' Z9 Y4 K& i/ B6 {* s) s
540
" r, B& }/ M. Lat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! [( h4 y0 a* x# x- F; c% lthe base of the phallus and was dark and curled. The
& h6 g: o; H0 l- v; vtesticular volume was prepubertal at 2 mL each.9 Z( J: ? d H1 `0 R& M7 F0 a8 N
The skin was moist and smooth and somewhat2 Q' {5 }# [' m- f6 R
oily. No axillary hair was noted. There were no1 U, J. x+ P. I' R4 a4 `, N4 }! i6 S
abnormal skin pigmentations or café-au-lait spots.1 u& F! H- p3 @+ L7 Z
Neurologic evaluation showed deep tendon reflex 2+4 C7 }8 X3 q- U. e& j: d8 u! w
bilateral and symmetrical. There was no suggestion# L. g1 } M$ p$ a3 B( o, z
of papilledema.
$ _$ S' t. i% ^1 oLaboratory Evaluation: ?9 u/ Q, l, _
The bone age was consistent with 28 months by
9 F g8 C. y5 tusing the standard of Greulich and Pyle at a chrono-6 X% g4 o8 y2 K, Z6 s6 _# Y1 k* w
logic age of 16 months (advanced).5 Chromosomal" ?0 N2 p O3 ~
karyotype was 46XY. The thyroid function test0 _0 w2 Z! o$ ^7 n- v" j& e4 Z
showed a free T4 of 1.69 ng/dL, and thyroid stimu-7 b( X1 [$ m$ i+ s
lating hormone level was 1.3 µIU/mL (both normal).. S* R7 a* d; E: X: s, R7 \
The concentrations of serum electrolytes, blood! O+ i: `# q, p# H
urea nitrogen, creatinine, and calcium all were) L' |' I: O; K1 \
within normal range for his age. The concentration
x$ b: y$ N3 ?! m, f& cof serum 17-hydroxyprogesterone was 16 ng/dL1 W9 w" s8 C: ~' I5 i
(normal, 3 to 90 ng/dL), androstenedione was 20
, p1 O. B9 k9 m2 K( [# nng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& h+ W w) Z6 V/ B* s0 l5 Uterone was 38 ng/dL (normal, 50 to 760 ng/dL),2 e, u; K6 Q0 A4 L* w# _2 R, V
desoxycorticosterone was 4.3 ng/dL (normal, 7 to) |, o% J$ V B7 Z2 M8 S
49ng/dL), 11-desoxycortisol (specific compound S)+ @5 c/ x O& ?5 H
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
! f! s0 j6 a8 z4 ~' itisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
2 j$ @3 e3 q. _ mtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),, t Y4 s2 y8 F' c& K6 B
and β-human chorionic gonadotropin was less than. n" g; ~# _( j( P2 f
5 mIU/mL (normal <5 mIU/mL). Serum follicular
8 I( m$ ?$ s1 h5 {9 K& xstimulating hormone and leuteinizing hormone
. z h7 f6 P- bconcentrations were less than 0.05 mIU/mL0 Y3 }! n3 c$ L$ G: F* X
(prepubertal).
& M8 x/ N. {" ^7 z6 }! l- f, V" SThe parents were notified about the laboratory" m7 U# ?$ ~! M' U+ I! @
results and were informed that all of the tests were
0 g- T6 s* m! f- k7 B% \. unormal except the testosterone level was high. The
L V. }; y- g6 c1 q. L6 ~0 Jfollow-up visit was arranged within a few weeks to! {% q6 w. o4 u9 m2 y' S& A; Y- s
obtain testicular and abdominal sonograms; how-
# V0 H( h6 Q6 {+ i! z! yever, the family did not return for 4 months.9 @' b/ v! R6 r) x8 Y
Physical examination at this time revealed that the
1 r g, A0 l8 C* C: N% a. ?child had grown 2.5 cm in 4 months and had gained
. d/ d! ?5 }5 S) k* B' z2 kg of weight. Physical examination remained/ u/ F# L) C* Z! W; A
unchanged. Surprisingly, the pubic hair almost com-/ d5 d# \# v- Y8 i% Y4 V
pletely disappeared except for a few vellous hairs at+ n* Y. Z r( G s% O# x$ X8 A
the base of the phallus. Testicular volume was still 21 D, h3 R9 d/ m9 o( V1 U/ {& y
mL, and the size of the penis remained unchanged.
- W# L. L1 p7 V: {9 O3 JThe mother also said that the boy was no longer hav-
) Z3 ~7 r; R: @$ ~0 n# zing frequent erections.' S5 O# u3 G" h2 v
Both parents were again questioned about use of. b I- X3 Q# {! ?% b; i
any ointment/creams that they may have applied to5 F- i; \1 g) j0 D+ p. Y
the child’s skin. This time the father admitted the
2 Q% J" u% ]* e; e# oTopical Testosterone Exposure / Bhowmick et al 541- g% A) b: _% S9 k: E+ }; D
use of testosterone gel twice daily that he was apply-
" |( }: @: p+ F. S' G5 l% Ging over his own shoulders, chest, and back area for
- ?4 s+ B: u5 ^a year. The father also revealed he was embarrassed
( N" q" r) g8 w9 o: Zto disclose that he was using a testosterone gel pre-
/ E. D0 {7 G3 {4 [8 _; ~3 Jscribed by his family physician for decreased libido
1 |" ^# e0 x+ l0 W7 |secondary to depression.
% l8 v2 Y4 |) N* fThe child slept in the same bed with parents.0 ^0 O! Z* I) N/ ?" ^0 S
The father would hug the baby and hold him on his6 e9 N7 H5 o* x2 I1 s- S) f r' Q! \
chest for a considerable period of time, causing sig-
! x' t9 M W2 D$ Gnificant bare skin contact between baby and father.
% m6 T1 W5 h# KThe father also admitted that after the phone call,# l2 M' `5 k( C& R/ m
when he learned the testosterone level in the baby
* B, l- s# _' N, D5 Twas high, he then read the product information+ \3 h, ^' W. B
packet and concluded that it was most likely the rea-! n6 {9 I2 R- g* K1 @' w' s
son for the child’s virilization. At that time, they
% Y& E$ z4 @1 T, ^ f$ ~: Wdecided to put the baby in a separate bed, and the* y+ O/ E* t1 o* j2 }
father was not hugging him with bare skin and had
) S( K" |& W, C% y6 e5 A* Sbeen using protective clothing. A repeat testosterone; |7 C$ p; N8 v# l
test was ordered, but the family did not go to the7 L& W2 c; q/ L `
laboratory to obtain the test.3 n5 h d) m. E8 M) I( D
Discussion: L, d% f; h3 z4 |; H
Precocious puberty in boys is defined as secondary7 N; O# ?+ f( G7 G6 b) g
sexual development before 9 years of age.1,45 x5 j, `' J9 p: p; T& j5 p8 @
Precocious puberty is termed as central (true) when
; S8 l- s% n& \" b: m$ Uit is caused by the premature activation of hypo-
% s/ z$ o8 f: B& \thalamic pituitary gonadal axis. CPP is more com-
( O, l3 l/ D" m6 L0 N. gmon in girls than in boys.1,3 Most boys with CPP
8 v9 A9 _# B3 E3 F& Fmay have a central nervous system lesion that is
5 e, M( D% \# {+ g& y. Presponsible for the early activation of the hypothal-: e2 }5 [2 x, }$ j9 ?$ C. j
amic pituitary gonadal axis.1-3 Thus, greater empha-
( @! k" g g1 t/ \& }sis has been given to neuroradiologic imaging in
8 l! X$ J8 r. D! s) |/ w0 E7 xboys with precocious puberty. In addition to viril-, a8 A9 I0 C g& V, w
ization, the clinical hallmark of CPP is the symmet-
4 ^1 ^3 X G9 |- Q8 Xrical testicular growth secondary to stimulation by/ K- a6 L; u; X" n- |. V$ J
gonadotropins.1,3/ X% v v/ o1 Y; M
Gonadotropin-independent peripheral preco-( {* H/ l8 S0 h( U2 Q
cious puberty in boys also results from inappropriate
k4 C2 ~ f3 q$ L% Handrogenic stimulation from either endogenous or
7 S0 ^4 D7 m" h" L+ O) c% [: lexogenous sources, nonpituitary gonadotropin stim-
+ b6 j' ^4 M1 @" w0 _! m. k+ yulation, and rare activating mutations.3 Virilizing
0 B( z1 I, i Ncongenital adrenal hyperplasia producing excessive
- P% P& T4 n/ ~5 r" D* ]adrenal androgens is a common cause of precocious9 l* G6 C0 R' h3 y) V1 W
puberty in boys.3,4
" G( |; u; M" H" WThe most common form of congenital adrenal9 s) Z+ ]7 v, F4 p
hyperplasia is the 21-hydroxylase enzyme deficiency., w+ Y- x8 f6 A* \
The 11-β hydroxylase deficiency may also result in) j( m; J, L' h
excessive adrenal androgen production, and rarely,
' A0 z9 t$ {9 c& y' u0 san adrenal tumor may also cause adrenal androgen* ~" t5 B: ~- o
excess.1,3
4 y( `0 Y2 r7 _* c" tat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, |; |) P4 ~1 |" C6 J9 {9 Y: e542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
+ ~/ G: Z% I9 y7 sA unique entity of male-limited gonadotropin-" q3 d0 z5 {4 m6 K- _
independent precocious puberty, which is also known: |1 Y. P8 A% {3 B# {/ J- `7 A
as testotoxicosis, may cause precocious puberty at a% }" l2 v" T" w! W
very young age. The physical findings in these boys
: x& s6 Q8 T: y; Q9 Rwith this disorder are full pubertal development,
/ p* v4 }, {4 Aincluding bilateral testicular growth, similar to boys/ M5 E9 v4 E. `" l8 o
with CPP. The gonadotropin levels in this disorder
$ d6 \3 K3 {3 H5 G) p Q5 hare suppressed to prepubertal levels and do not show+ i% Q2 p L7 k8 h( A5 q
pubertal response of gonadotropin after gonadotropin-
5 J; X) \: B/ o9 Lreleasing hormone stimulation. This is a sex-linked
- o" [% x' m& j( g, i8 K$ V8 ~autosomal dominant disorder that affects only
1 e, p4 |" A& w8 Mmales; therefore, other male members of the family
3 W7 I- I0 ?4 M p9 @may have similar precocious puberty.3
. {. P ~/ V/ C% }In our patient, physical examination was incon-
& G- C, H! q3 \sistent with true precocious puberty since his testi-
. n/ u6 v- \" g9 Hcles were prepubertal in size. However, testotoxicosis
/ q2 G" z1 F8 ?; U6 \: Uwas in the differential diagnosis because his father& B7 G" H3 W) h* w2 Y
started puberty somewhat early, and occasionally,3 e& l' z; G( W% |% [/ G: J
testicular enlargement is not that evident in the3 w- @. x8 Z$ b, u7 ~$ v( O9 p
beginning of this process.1 In the absence of a neg-
; k8 [6 v! V; k0 u5 ]ative initial history of androgen exposure, our
' c# u1 K! ]+ e+ h; ]. I" t6 Jbiggest concern was virilizing adrenal hyperplasia,
5 r9 Y7 r* b! Keither 21-hydroxylase deficiency or 11-β hydroxylase# ~" k+ \1 `; p7 c1 m
deficiency. Those diagnoses were excluded by find-0 M/ ~/ M1 H. ~; b+ J, e2 C
ing the normal level of adrenal steroids.3 M: q6 F: S4 S. {: l
The diagnosis of exogenous androgens was strongly
. h" E+ J' I! ~5 `6 O, asuspected in a follow-up visit after 4 months because5 n3 ]7 b6 w( @8 l0 {
the physical examination revealed the complete disap-- P3 U5 r9 @) C! ^! @: Y
pearance of pubic hair, normal growth velocity, and
" g: |4 O f4 t5 a, p. c( M% [decreased erections. The father admitted using a testos-5 {+ [4 b* x2 ^+ @) N% s, i
terone gel, which he concealed at first visit. He was8 m2 o: i Q! n Y; b, p! D
using it rather frequently, twice a day. The Physicians’
c( b8 `" ?& Y9 f9 d- a: b* HDesk Reference, or package insert of this product, gel or
) Q' m( b' A+ R+ k3 i) B% [* Zcream, cautions about dermal testosterone transfer to
& c! {% M g( ~% V# Qunprotected females through direct skin exposure.2 I5 D5 Q* }+ \& \& M
Serum testosterone level was found to be 2 times the' t7 n W, ]3 X+ _/ K8 j0 T) O
baseline value in those females who were exposed to) \5 p' ?3 b7 x" J" ]/ `9 g
even 15 minutes of direct skin contact with their male/ E5 m. {6 ~" n3 n/ E
partners.6 However, when a shirt covered the applica-5 g( D( Y8 R1 K4 ~. ~; H8 i
tion site, this testosterone transfer was prevented.1 @5 y/ {& C* l+ H' |6 C e
Our patient’s testosterone level was 60 ng/mL,
; n7 O' |1 u: A& Bwhich was clearly high. Some studies suggest that
% \ |' o7 c; P4 A$ ]& y+ fdermal conversion of testosterone to dihydrotestos-
3 T% Z% z* V' g- [1 Bterone, which is a more potent metabolite, is more; [+ s1 Z2 f, T) w! g, J
active in young children exposed to testosterone
+ m. N0 f) a2 t' _9 H( @% xexogenously7; however, we did not measure a dihy-
( W' h. v a0 t/ x# ~: _0 k% rdrotestosterone level in our patient. In addition to' Q- x9 u& G/ B# `1 Z+ ~0 A
virilization, exposure to exogenous testosterone in
0 t1 p0 d& ^1 j# y4 O' T8 rchildren results in an increase in growth velocity and# q$ w1 |: ~8 Y3 c5 B# \1 x
advanced bone age, as seen in our patient.
; L) B5 h$ X6 q0 }The long-term effect of androgen exposure during
6 i" Q9 c$ H( m5 _6 q$ Zearly childhood on pubertal development and final
! A j; Z0 B! B! x+ ^adult height are not fully known and always remain
2 Y" m& u" B! G& Ma concern. Children treated with short-term testos-* o1 s) Z' q8 J3 E8 d! N0 [3 Y# l3 {
terone injection or topical androgen may exhibit some
. p$ Z0 u5 k R: j% ]: tacceleration of the skeletal maturation; however, after* M p. Q: [, J4 Z6 ?
cessation of treatment, the rate of bone maturation0 h; t( S6 S6 K+ i- a* N
decelerates and gradually returns to normal.8,95 |% `% k6 a8 ?7 _) ^3 h
There are conflicting reports and controversy: w& F! T5 A, u( `0 e
over the effect of early androgen exposure on adult ^. b3 v/ @% z) X
penile length.10,11 Some reports suggest subnormal
7 z8 ]9 U# u/ Madult penile length, apparently because of downreg-$ t4 K, R- d! Z. ^& X% G
ulation of androgen receptor number.10,12 However,4 S6 [3 e& D: j' |
Sutherland et al13 did not find a correlation between
) Q; D# A9 R$ ychildhood testosterone exposure and reduced adult
: m0 W' n) ?! T- npenile length in clinical studies.
# m& B" i3 o( v0 o* _Nonetheless, we do not believe our patient is- }, M; _* D- R
going to experience any of the untoward effects from
; a$ k: L2 ~0 Z9 c" y3 P" btestosterone exposure as mentioned earlier because* ~; P: t4 }% Y! T6 g
the exposure was not for a prolonged period of time.
9 z% |* P. m3 O: o& z9 n: O# eAlthough the bone age was advanced at the time of
& k: |5 P: v3 J% E' z, r, Adiagnosis, the child had a normal growth velocity at) C5 ^7 [% u: ?6 U5 H3 {) h( |
the follow-up visit. It is hoped that his final adult$ H! ] H$ A v. j+ K
height will not be affected.
* |6 V$ o4 a9 | s9 NAlthough rarely reported, the widespread avail-+ ?) G; z/ b7 m; ?1 u5 j
ability of androgen products in our society may" l* J$ O' e, u) ?. U
indeed cause more virilization in male or female5 A+ t1 l- B: _( Y) {
children than one would realize. Exposure to andro-; O/ V! s$ L% E5 A7 |% W4 M
gen products must be considered and specific ques-$ i" H* U: V2 R+ I
tioning about the use of a testosterone product or3 x& D+ N9 E3 Z
gel should be asked of the family members during
- [% l% U8 I9 u( b9 f/ Nthe evaluation of any children who present with vir-
+ I' F: F2 A# x% Y$ E* \ilization or peripheral precocious puberty. The diag-
% Z7 l0 }* q( q2 K6 ^" cnosis can be established by just a few tests and by
7 r" t* \- G7 i cappropriate history. The inability to obtain such a, F; @& ?( h0 L) q& ?
history, or failure to ask the specific questions, may
- Q8 e( L1 ]7 V8 F5 C. p( g( ?4 c1 E( r* dresult in extensive, unnecessary, and expensive
* r) I( @$ w! ^7 Yinvestigation. The primary care physician should be8 J# C2 u: i& `" i3 c
aware of this fact, because most of these children
* v1 |; ]4 u' Q% ^; K. p# ]( q, {may initially present in their practice. The Physicians’
: F: a9 d) D9 Q- }. ?4 d$ l2 LDesk Reference and package insert should also put a0 t0 q; _- ~; F0 f
warning about the virilizing effect on a male or& q- d1 D/ y( B D
female child who might come in contact with some-8 g- I' X* S6 k6 g
one using any of these products.
6 Q$ K" w$ ?+ a, N* m8 ^( U. \References
& ]. |5 n4 W* c/ N) b! t) |/ L4 ~1. Styne DM. The testes: disorder of sexual differentiation
* O+ W1 h5 z4 \1 rand puberty in the male. In: Sperling MA, ed. Pediatric
6 [4 l8 X) A( D) n# \) r, W$ j7 _4 XEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
, }( B6 y& K, b$ W2 |2002: 565-628.
- X" i( S8 { l% ?: \! d2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious b1 n6 w' L9 p* K
puberty in children with tumours of the suprasellar pineal4 q. q* ^8 e- H- L( Q
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- ^; t1 P! Q# P# w7 K2 {; ^* qareas: organic central precocious puberty. Acta Paediatr.
, Z2 e% P" F- I9 z- @* T' \( d2001;90:751-756.2 }3 R* j8 ?6 n
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.+ B& ]8 D' o, @0 Y
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
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development in a two-year-old boy induced by topical5 i, n9 X$ m" p+ |% J) [: @" m% h8 c
exposure to testosterone. Pediatrics. 1999;104:e23.5 {* U3 }% Q5 {8 A! m9 d
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of. X* F( P/ E0 T7 E
Skeletal Development of the Hand and Wrist. 2nd ed.
9 u3 V6 k8 k" K& N2 V, b, F4 xStanford, CA: Stanford University Press; 1959.7 Y! E( e% e$ R. s9 A$ N1 |% j
6. Physicians’ Desk Reference. Androgel 1% testosterone,8 f J+ }. L9 }
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
9 E# t* U2 \' \% {Economics Company, Inc; 2004:3239-3241.7 J. Y0 a0 i( A' A6 S
7. Klugo RC, Cerny JC. Response of micropenis to topical
2 u1 j- c# W& @testosterone and gonadotropin. J Urol. 1978;119:
$ z8 b1 S4 O( C: R# N9 i667-668.
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