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is a significant concern for physicians. Central
( B& l4 H# r% J0 uprecocious puberty (CPP), which is mediated
. O# t9 z# t p1 N. Q9 Othrough the hypothalamic pituitary gonadal axis, has
1 @+ h" B1 G/ a% Y, A5 R. x7 A) g7 oa higher incidence of organic central nervous system7 J5 V* w( r- x, k/ ^6 B" H" {
lesions in boys.1,2 Virilization in boys, as manifested8 ]. S; f4 T: v1 D
by enlargement of the penis, development of pubic
5 D8 E4 \5 P0 e# C4 l: O: Bhair, and facial acne without enlargement of testi-2 u( S- _- P+ [& r* a
cles, suggests peripheral or pseudopuberty.1-3 We
( a7 z: j1 d/ Y: k* X% mreport a 16-month-old boy who presented with the! w& H* A0 c" R& V4 m5 T! V8 \
enlargement of the phallus and pubic hair develop-
7 }# V: c, I1 |3 vment without testicular enlargement, which was due
$ A, l( K4 j! R, d, R' g" @& ito the unintentional exposure to androgen gel used by' j' ~1 q: }5 I# Q% Z
the father. The family initially concealed this infor-
( a6 V8 O% |: `# l0 Q5 ]: _mation, resulting in an extensive work-up for this
0 ]( P/ U7 y$ w4 a+ J& Y* v) ]" G) b% \child. Given the widespread and easy availability of
5 ^2 c" O# P3 |% V0 Z d8 Qtestosterone gel and cream, we believe this is proba-1 Z2 i, C+ R% u1 r8 \; c. I
bly more common than the rare case report in the
6 O1 R) R9 P1 B4 C _7 @$ P9 @2 a! tliterature.4- W u% Q7 k$ i J1 `- K; Q
Patient Report! X; F7 T/ a/ ^* c
A 16-month-old white child was referred to the
# G% Z+ E5 G/ t8 |4 i) g: H' Uendocrine clinic by his pediatrician with the concern
/ Q6 g9 g- o: e3 t+ M5 Uof early sexual development. His mother noticed0 t6 L# M1 o; L2 ^, Z) R& |
light colored pubic hair development when he was' H" n6 l. N R
From the 1Division of Pediatric Endocrinology, 2University of
1 p, L9 R* ^ W/ k+ w/ j* ESouth Alabama Medical Center, Mobile, Alabama.5 n* S, o+ ~! m7 M0 L
Address correspondence to: Samar K. Bhowmick, MD, FACE,
. H- v& B- U! q; p+ j0 K: ^Professor of Pediatrics, University of South Alabama, College of
; K2 i. V6 M* f* SMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
1 u2 k, e1 s6 M5 |e-mail: [email protected]." U; `1 n6 J: d) c1 p0 V/ u( L
about 6 to 7 months old, which progressively became: _7 n* b4 _4 L8 h4 n I! U
darker. She was also concerned about the enlarge-
2 p2 A' {/ S! xment of his penis and frequent erections. The child
) D* [) w& S1 U9 ]was the product of a full-term normal delivery, with
4 c f: X, u9 O& ea birth weight of 7 lb 14 oz, and birth length of/ J: n% S2 K8 N" c0 ]% @7 N
20 inches. He was breast-fed throughout the first year
4 F8 ~" m- ~8 p. fof life and was still receiving breast milk along with
8 o9 X7 Z+ ~! I$ Y7 ssolid food. He had no hospitalizations or surgery,) v0 R; V7 ], g3 Y* ?, H' E
and his psychosocial and psychomotor development
/ t7 p+ r, L0 @0 B* Q" Nwas age appropriate.7 ]8 L' p( @; f2 ~4 D1 v
The family history was remarkable for the father,2 ~/ ?( H) A6 d- s2 X0 p7 K) {; V
who was diagnosed with hypothyroidism at age 16,; `! W' a4 f# r+ K. }' a7 O4 }
which was treated with thyroxine. The father’s% r6 H* G& ^8 e; H% q5 M
height was 6 feet, and he went through a somewhat
) B& s( X2 |+ w) I8 `, m+ o ^ Kearly puberty and had stopped growing by age 14.
/ @6 z! R: r. P+ i/ C$ `The father denied taking any other medication. The
_, c8 d. v0 w, z6 `5 `! Hchild’s mother was in good health. Her menarche
) k* D1 {" a& z9 lwas at 11 years of age, and her height was at 5 feet
' |- T. y8 {3 U( S5 q. t! p5 inches. There was no other family history of pre-% k$ T- S8 g. W4 r& [
cocious sexual development in the first-degree rela-
1 R6 w5 h0 W5 M6 ^" K+ Gtives. There were no siblings.+ [' L: A" E- I( D- u
Physical Examination, R, O: Q4 E" N
The physical examination revealed a very active,9 \# M* C! A5 {; U$ W& e+ W0 x
playful, and healthy boy. The vital signs documented
4 K0 P' R" v" R+ q! u7 i F7 xa blood pressure of 85/50 mm Hg, his length was" c; g9 f% h. O4 \1 }/ X) |
90 cm (>97th percentile), and his weight was 14.4 kg
) v3 T1 K+ ^7 Y! z" Z(also >97th percentile). The observed yearly growth
+ D# }8 A9 {* [# |' p" y3 O- g Wvelocity was 30 cm (12 inches). The examination of4 L& m3 Y; Q3 Y+ z
the neck revealed no thyroid enlargement.
b: T, L7 n, w+ N4 kThe genitourinary examination was remarkable for
8 ?$ ^. o/ D6 m8 G% f2 uenlargement of the penis, with a stretched length of6 D E' Z4 W2 i8 i% {. Y3 }; y
8 cm and a width of 2 cm. The glans penis was very well
2 q+ U" L6 ~9 l8 `( \developed. The pubic hair was Tanner II, mostly around7 r3 T `: M9 b; q8 t7 l b1 V
5403 n7 l! ~' @8 p* l9 T2 p
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the base of the phallus and was dark and curled. The/ v. l4 S4 O1 k# B
testicular volume was prepubertal at 2 mL each.: D2 P. q( ~5 \2 t7 z1 L+ h
The skin was moist and smooth and somewhat
# B2 k9 X9 T% p( doily. No axillary hair was noted. There were no
- F }0 V9 p" F* ?5 v7 k# Uabnormal skin pigmentations or café-au-lait spots.
1 z. x+ }0 H0 n! J& B8 k0 bNeurologic evaluation showed deep tendon reflex 2+
, D$ ]* Y" o' \bilateral and symmetrical. There was no suggestion
P: `" V T& O, N& D0 Sof papilledema.7 z0 t+ }; }& e- V) j3 i
Laboratory Evaluation# ]8 N: l) L0 A3 O$ t; R. E5 Z
The bone age was consistent with 28 months by- L. Q. s A3 `5 e8 F1 _
using the standard of Greulich and Pyle at a chrono-
5 P& ^' @# g6 ylogic age of 16 months (advanced).5 Chromosomal/ N3 d8 [# N) `* x2 y6 f/ m
karyotype was 46XY. The thyroid function test
! ?; o. z% Y% w! f' gshowed a free T4 of 1.69 ng/dL, and thyroid stimu-, o9 d4 ~. y9 f: _* ^% Y9 |# Q
lating hormone level was 1.3 µIU/mL (both normal).
/ S9 F; o/ k& g& oThe concentrations of serum electrolytes, blood0 v* l7 B* Z" ?, \5 }; R
urea nitrogen, creatinine, and calcium all were
6 n* ~1 P3 X- i* O$ T" |within normal range for his age. The concentration( A0 g. `1 H0 d3 d
of serum 17-hydroxyprogesterone was 16 ng/dL6 x6 h+ ]+ \: c, ]
(normal, 3 to 90 ng/dL), androstenedione was 20/ Z2 F% Q" {- i+ r
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
4 x' z) u1 K! I+ O; Q" {& uterone was 38 ng/dL (normal, 50 to 760 ng/dL),$ _4 \; Y2 B* t* C' L/ u
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
4 E& A1 r4 ]* I& j49ng/dL), 11-desoxycortisol (specific compound S)" d% O) F% u: Y) [2 R& @1 Z
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-/ J+ I$ \3 T& r
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
% S: s n P* U$ I) }3 O: xtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),, c2 F4 X+ h( m5 E) U0 Z" D. b
and β-human chorionic gonadotropin was less than6 t" p4 k- V! c/ M# M- t6 S* P0 o
5 mIU/mL (normal <5 mIU/mL). Serum follicular" `' k- |# w' y. h Q1 ]
stimulating hormone and leuteinizing hormone/ `9 f! O l: y9 a$ [
concentrations were less than 0.05 mIU/mL
( G2 ~( O3 J2 q" ]2 p C* q(prepubertal).6 Y0 a/ {' ]; Y4 E& ^" b
The parents were notified about the laboratory- a1 c2 [ m$ u) v7 c/ U3 @1 D
results and were informed that all of the tests were2 n& ]; v6 R: ?2 h* N
normal except the testosterone level was high. The
7 {$ Z3 t5 q, S4 bfollow-up visit was arranged within a few weeks to- ^7 |$ y B3 |9 n V' ]( W. e$ Y; R
obtain testicular and abdominal sonograms; how-
* H; S8 n; a3 b0 Gever, the family did not return for 4 months.
1 Z E+ c$ I8 ]! X( yPhysical examination at this time revealed that the, z, z9 }% X) W- |& @+ r
child had grown 2.5 cm in 4 months and had gained" w, H' \. y' z9 T. E) F* t/ ]
2 kg of weight. Physical examination remained; c6 {6 E' V$ P" G
unchanged. Surprisingly, the pubic hair almost com-4 ^) z7 z- ]: R# A/ G
pletely disappeared except for a few vellous hairs at
, l1 j3 y! j4 l' l; F2 p5 n+ pthe base of the phallus. Testicular volume was still 2
/ D' g! A6 T" h& ^4 E" w omL, and the size of the penis remained unchanged.
0 v) ~0 |8 b: o; ~! u( _The mother also said that the boy was no longer hav-
. L5 {* N/ L0 z0 S+ L2 ning frequent erections.
6 V* R) @' U5 e& X" |2 aBoth parents were again questioned about use of( f$ V- t3 e ] l; R* |
any ointment/creams that they may have applied to
' q: m: e+ I5 Nthe child’s skin. This time the father admitted the
- l2 |, R) y% g8 @) j/ M! NTopical Testosterone Exposure / Bhowmick et al 541 c) \/ Q( F. }- M4 X1 e
use of testosterone gel twice daily that he was apply-& M3 I( r$ m. d. O8 U" b* q: @
ing over his own shoulders, chest, and back area for$ k2 N! W3 y# c
a year. The father also revealed he was embarrassed
0 E7 ~9 F9 Q* f) D1 q& r; mto disclose that he was using a testosterone gel pre-/ [+ Q: G- V1 K; C) A
scribed by his family physician for decreased libido. j+ ?# x4 N5 @% b" f
secondary to depression.
8 D7 \ h0 Y& c7 s$ B: O, ?) UThe child slept in the same bed with parents.0 J: W/ O4 K5 p& F* u
The father would hug the baby and hold him on his
5 }$ z, u; s# P! o9 a5 dchest for a considerable period of time, causing sig-
2 O9 U# n9 I6 K# X2 qnificant bare skin contact between baby and father. I b$ J9 t# Q1 e: j) v+ x
The father also admitted that after the phone call,2 {' }* N7 m/ A; r2 c
when he learned the testosterone level in the baby; ~; A% S5 \' t% X# s* O
was high, he then read the product information$ Q) X0 p$ L8 D! b4 W/ _
packet and concluded that it was most likely the rea-% p& O! \% b) T& I* l
son for the child’s virilization. At that time, they0 P3 U! Z% _% \, }3 ^) R* R
decided to put the baby in a separate bed, and the- }0 |3 i$ R5 s. K
father was not hugging him with bare skin and had
& g+ `" v& P- C# Qbeen using protective clothing. A repeat testosterone' a4 O3 t# o0 @+ ^3 v8 @5 D9 ^
test was ordered, but the family did not go to the
) g9 c9 ]+ K6 d! g" T, glaboratory to obtain the test.
7 b( B3 G7 `! lDiscussion! U R3 j3 S# M
Precocious puberty in boys is defined as secondary
9 z6 a' k9 ^8 s2 u7 Y" C, vsexual development before 9 years of age.1,40 z/ V0 W! \6 \3 L" R: ~9 R4 n \& ^
Precocious puberty is termed as central (true) when
0 o- U8 t% t6 e) V4 u, D( iit is caused by the premature activation of hypo-4 a* O9 p- G! x; i
thalamic pituitary gonadal axis. CPP is more com-* H/ S, }, b/ s. J. ?
mon in girls than in boys.1,3 Most boys with CPP
$ u( s& V! y" A: ]2 _may have a central nervous system lesion that is
' L" W! R7 v) Oresponsible for the early activation of the hypothal-$ J5 u% p# W! A. f3 b7 e
amic pituitary gonadal axis.1-3 Thus, greater empha-
) E- r# |( B- S4 o; Jsis has been given to neuroradiologic imaging in% A6 y3 X. E) `& z
boys with precocious puberty. In addition to viril-
& L. r0 t* @0 I5 e, `- z5 B8 j+ T, vization, the clinical hallmark of CPP is the symmet-7 G* A+ R5 L& P r1 a( c
rical testicular growth secondary to stimulation by
) c) D6 O/ ]' G) J! Tgonadotropins.1,36 b5 z& G1 S" c: ~& r- c; A
Gonadotropin-independent peripheral preco-: W4 Q1 h6 ^5 ~* b ^
cious puberty in boys also results from inappropriate
6 n) @- a: C8 S$ ^# j% [. pandrogenic stimulation from either endogenous or/ e6 S0 [2 }/ B# n6 i
exogenous sources, nonpituitary gonadotropin stim-
4 s( i$ j+ |- p8 v4 \ulation, and rare activating mutations.3 Virilizing$ f4 m" R: Q/ l9 a8 R l/ ~
congenital adrenal hyperplasia producing excessive9 K+ ]2 Z9 k( g4 ]* g
adrenal androgens is a common cause of precocious
4 J f/ {# R a# D) k- Rpuberty in boys.3,43 H" K9 B$ x% {' z9 ]* y
The most common form of congenital adrenal' j0 o( W1 B0 S% L* U4 \
hyperplasia is the 21-hydroxylase enzyme deficiency.
- w6 z u" K2 z/ M! `* E' n6 F2 |The 11-β hydroxylase deficiency may also result in* F- v; J+ H, }5 Y1 @' d+ `8 p
excessive adrenal androgen production, and rarely,' B% @7 `; o- K0 y" u
an adrenal tumor may also cause adrenal androgen: T- R1 N" l* s( x I# T
excess.1,3; k. K' p: \1 i2 ?! W* r
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) Z+ k, E7 {" P7 W
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
2 z$ U7 K( c* ^! D: P- m2 [A unique entity of male-limited gonadotropin-1 H" v1 U& R4 }, O5 W. d9 y
independent precocious puberty, which is also known
( g5 H+ \$ v% e' r* w& Ras testotoxicosis, may cause precocious puberty at a0 S5 n, j: V4 q$ Y6 `5 a) h, a
very young age. The physical findings in these boys k5 m! [4 e: J7 O
with this disorder are full pubertal development,! A$ x* m2 ]% Q
including bilateral testicular growth, similar to boys+ S3 E7 E; v6 _. C6 [/ u7 ]" H
with CPP. The gonadotropin levels in this disorder
- ]1 _1 z; k$ x0 {+ P: Yare suppressed to prepubertal levels and do not show- c$ A9 [% Y3 Z
pubertal response of gonadotropin after gonadotropin-
& X0 n0 C6 v5 }' x1 wreleasing hormone stimulation. This is a sex-linked$ |: K. E! F$ K* e t; q' Q6 j, B0 n
autosomal dominant disorder that affects only8 y/ g" h: z# |/ o
males; therefore, other male members of the family
, ~- N- P7 B4 @may have similar precocious puberty.3& A# ^3 o7 x1 s
In our patient, physical examination was incon-
: O* s2 d. G0 c. ^6 i$ csistent with true precocious puberty since his testi-% f! u- R0 J" z3 T: G- q
cles were prepubertal in size. However, testotoxicosis
: N/ {/ _' r) B$ F/ Hwas in the differential diagnosis because his father$ _9 }* ?" x( K2 C* y
started puberty somewhat early, and occasionally,
7 X+ Z* ]! K* a( itesticular enlargement is not that evident in the
( v5 N {/ f6 Y/ w) `' N3 Rbeginning of this process.1 In the absence of a neg-9 H) N0 ~3 Q8 E
ative initial history of androgen exposure, our
* M$ w# l/ n- A; Fbiggest concern was virilizing adrenal hyperplasia,
! `5 O* V0 L( Z; g3 j8 peither 21-hydroxylase deficiency or 11-β hydroxylase! \+ |; g1 P5 ~! g) `* n, K
deficiency. Those diagnoses were excluded by find-
) M/ [0 u' G4 A% g/ r5 |8 q! z6 N% Fing the normal level of adrenal steroids.' o9 Y& w) k+ Q1 w9 S1 ^# B8 ?( g
The diagnosis of exogenous androgens was strongly
7 Y E* Y0 b7 z/ Zsuspected in a follow-up visit after 4 months because8 y; ]$ d; i" M2 H# }4 R
the physical examination revealed the complete disap-1 [( K, O3 C% }) w, x3 T( u
pearance of pubic hair, normal growth velocity, and
9 D: B- \; @, x+ Z3 q, Mdecreased erections. The father admitted using a testos-
1 q8 i, u+ ~0 q+ a' V. i! L( \terone gel, which he concealed at first visit. He was
( _( x* @. R! }! Q. k; `# G, s6 Y! rusing it rather frequently, twice a day. The Physicians’ @7 q( @, J! r0 ?2 E
Desk Reference, or package insert of this product, gel or
: X4 G m( y0 a6 O! \; S0 Dcream, cautions about dermal testosterone transfer to
, A% I) U; [, zunprotected females through direct skin exposure.+ V7 P g& q$ } I' b
Serum testosterone level was found to be 2 times the" C5 r, V" g7 R0 _
baseline value in those females who were exposed to+ C3 b% X. @% x Z
even 15 minutes of direct skin contact with their male1 R5 t! s1 G0 z' D* p
partners.6 However, when a shirt covered the applica-
3 f& i, `2 Q( y! m; }6 Dtion site, this testosterone transfer was prevented.( d" Z/ @, U1 r# c' m, `
Our patient’s testosterone level was 60 ng/mL," b1 s, F8 W# U/ _+ _& N" @
which was clearly high. Some studies suggest that+ N T- U6 C+ N9 q
dermal conversion of testosterone to dihydrotestos-
: k! w" M3 w. s# e" Z" @8 Bterone, which is a more potent metabolite, is more4 m: \0 ]" L/ t' n
active in young children exposed to testosterone5 H& M) K) H+ R2 Y. n
exogenously7; however, we did not measure a dihy-
1 B1 {5 }6 } O$ v0 M3 v5 c g1 Cdrotestosterone level in our patient. In addition to
9 L' ]" [% u# }; Cvirilization, exposure to exogenous testosterone in
( r# {( \) K# achildren results in an increase in growth velocity and
6 M( y5 ]" ~2 f* L. _advanced bone age, as seen in our patient.
9 p% D9 l- ?; C @; }The long-term effect of androgen exposure during
0 B8 U1 D# p: d& A" dearly childhood on pubertal development and final1 w$ e# h9 `% b. ^
adult height are not fully known and always remain
, C" Z8 P5 ~* X' n5 Wa concern. Children treated with short-term testos-, ~9 L2 G$ e+ y& ^* Z" @
terone injection or topical androgen may exhibit some
) b3 O' `+ _, O1 h% macceleration of the skeletal maturation; however, after- w3 h) H" V% P4 R. V7 j7 F
cessation of treatment, the rate of bone maturation* b# F Y) k- s1 f& [& \9 B. @ T
decelerates and gradually returns to normal.8,9
) i1 F) i/ ~1 G3 W9 @: S; J9 GThere are conflicting reports and controversy
" k% \8 }' t2 H9 lover the effect of early androgen exposure on adult4 k! ~7 d- T) W- |8 L$ C! t$ w
penile length.10,11 Some reports suggest subnormal
& [2 Y o" Q$ p+ r _adult penile length, apparently because of downreg-0 _/ Z& a s" m: R( h; _
ulation of androgen receptor number.10,12 However,' v" d/ L: }/ b( T/ f
Sutherland et al13 did not find a correlation between! K3 C. p; A6 \) y4 Z$ v' v
childhood testosterone exposure and reduced adult
7 }; b9 M+ H2 Y( e1 `( A3 i/ Epenile length in clinical studies.% X2 U. n/ H1 s8 e
Nonetheless, we do not believe our patient is4 Y0 A/ u5 ~( i4 r. A5 u" [, L8 Z
going to experience any of the untoward effects from
/ i% X, X% |$ h- C& Ntestosterone exposure as mentioned earlier because
: b/ m# `4 h2 p' E' t' D3 Ithe exposure was not for a prolonged period of time.) K- M; u: n- ~+ u: i
Although the bone age was advanced at the time of7 {& e7 C# T w
diagnosis, the child had a normal growth velocity at; ~5 P* U# M9 H2 o
the follow-up visit. It is hoped that his final adult
$ y; ]7 q9 z6 `1 a- cheight will not be affected.' [9 j* x o$ a2 b, ?/ \
Although rarely reported, the widespread avail-8 r1 x* s9 K9 ?1 Y
ability of androgen products in our society may
4 B7 y" c& ~( L2 Xindeed cause more virilization in male or female
" j3 c2 @. W$ ~children than one would realize. Exposure to andro-0 h N! s* t: q4 U
gen products must be considered and specific ques-
( A ~; L. l, ^3 v( }2 Xtioning about the use of a testosterone product or/ g8 e9 P+ Y* |* ]
gel should be asked of the family members during) M- ?1 A9 J. K1 N) D
the evaluation of any children who present with vir-! [5 i; S2 R' H' Z
ilization or peripheral precocious puberty. The diag-
- z; ?; i1 ~/ u+ R, \, n' p& r( anosis can be established by just a few tests and by3 O6 f% O+ I! `$ R
appropriate history. The inability to obtain such a+ y- x! {: S" p* [
history, or failure to ask the specific questions, may, {4 h+ y' `( w) o
result in extensive, unnecessary, and expensive
7 c2 D: e8 S; T- C0 N: Dinvestigation. The primary care physician should be
7 ~, @! B, d- t) w9 o' i6 E' Gaware of this fact, because most of these children
8 R2 P) B7 d! n9 z+ V" nmay initially present in their practice. The Physicians’
+ I( q0 c9 s' k; n" aDesk Reference and package insert should also put a
9 m" P6 W" V' B0 Q& nwarning about the virilizing effect on a male or
& {3 `- y3 R2 i" K& Sfemale child who might come in contact with some-% a. ^1 T* m3 X/ g q+ _
one using any of these products.$ c# z1 F j- A2 ^! u) B
References* e' V' O7 M+ T
1. Styne DM. The testes: disorder of sexual differentiation
2 B% {* y/ S: c3 g- c2 uand puberty in the male. In: Sperling MA, ed. Pediatric
& z4 h c# k$ n# m2 M* SEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
; w* m0 K @% \- Q+ O* Z5 ]3 a* v: R: B! e2002: 565-628.% H: ~# H+ R9 l* N
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
1 e4 f" s: Z- I0 R: x5 z" I) n3 Fpuberty in children with tumours of the suprasellar pineal
! C1 ^ c2 z6 |* S6 u. _1 B: rat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 Z T' S8 [0 h& Y
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! y; c% }. y, ^7 z8 vareas: organic central precocious puberty. Acta Paediatr.9 i t, m9 N- G' g# K, ~
2001;90:751-756.
2 t+ o( P# o0 f0 }1 |5 T% j3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
& e0 w) e8 n, W% R' y! u4 bPediatric Endocrinology. 4th ed. New York, NY: Marcel9 G k. o: u, l8 ]% U) f; ]3 A1 p
Dekker Inc; 2003:211-238.
0 b: e* f9 K: m4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual$ q( c; b R0 Q
development in a two-year-old boy induced by topical) k {. S1 Y% n0 l2 A$ b. `
exposure to testosterone. Pediatrics. 1999;104:e23.
% [5 t9 o4 i6 f& P6 L5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
. p/ J9 F, D. [: RSkeletal Development of the Hand and Wrist. 2nd ed.0 x0 n# ]6 c6 c& ] P$ S, C
Stanford, CA: Stanford University Press; 1959.
$ z8 [# r6 ?' ?' Y2 t6. Physicians’ Desk Reference. Androgel 1% testosterone,
, R) W5 M X8 K. A2 M$ i+ W* SUnimed Pharmaceutical Inc. Montvale, NJ: Medical
/ m% V5 S! J: GEconomics Company, Inc; 2004:3239-3241.
# C: }; W9 j) R4 B& P# ~# \! Z7 |+ S- W7. Klugo RC, Cerny JC. Response of micropenis to topical
8 ]* {% w& S/ m4 l; p6 {& ttestosterone and gonadotropin. J Urol. 1978;119:
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