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is a significant concern for physicians. Central0 Q% `0 V7 m) y9 n
precocious puberty (CPP), which is mediated
6 D0 J: s# f" H- Y/ xthrough the hypothalamic pituitary gonadal axis, has
4 u; T8 \+ o' I3 h4 na higher incidence of organic central nervous system0 V3 i2 _8 E# L
lesions in boys.1,2 Virilization in boys, as manifested+ N8 D, n' p0 e+ Q
by enlargement of the penis, development of pubic$ t; ]# j a6 S( w: h0 B# t; ^: d4 Y
hair, and facial acne without enlargement of testi-
! w$ }9 n$ }& b) Mcles, suggests peripheral or pseudopuberty.1-3 We
% i# j, k/ U7 C* V( Z$ Wreport a 16-month-old boy who presented with the
% @3 w" |& J3 m7 \: P7 denlargement of the phallus and pubic hair develop-+ o* o! D) S4 U( y2 C. w- y
ment without testicular enlargement, which was due" n* J6 x9 x% O4 o
to the unintentional exposure to androgen gel used by
" c, s+ k; a+ J6 }0 rthe father. The family initially concealed this infor-
; b- s2 r; {5 u$ l* [5 jmation, resulting in an extensive work-up for this+ G- `+ b- L( ?1 D, I
child. Given the widespread and easy availability of4 {0 Z8 D8 E5 K- I" c& `/ @% w
testosterone gel and cream, we believe this is proba-
/ z# H7 \. _3 x, i4 p) M% k: o2 Rbly more common than the rare case report in the1 L0 a+ D0 X9 ?% a
literature.4& W( w: i. p- g4 i3 T! J" o& D6 B
Patient Report. O3 }5 A6 w7 |! L
A 16-month-old white child was referred to the
& c: a. h0 l- i. e {endocrine clinic by his pediatrician with the concern
, f5 w! o3 ? j7 Vof early sexual development. His mother noticed
2 F, E. s6 J4 m- H" hlight colored pubic hair development when he was2 E% O$ p2 |! R E" F+ A& n) z
From the 1Division of Pediatric Endocrinology, 2University of" s4 Y$ f1 ?4 w6 k, t
South Alabama Medical Center, Mobile, Alabama.
( h# R. c+ w- ^! X! \ H& w \Address correspondence to: Samar K. Bhowmick, MD, FACE,& Z# ?$ `( u- f6 x
Professor of Pediatrics, University of South Alabama, College of0 D. k1 B- e" j8 C/ G
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
" b2 l" D: x6 B5 `. w, I" k }e-mail: [email protected].
- k0 H2 _5 P# L& e3 a: w* sabout 6 to 7 months old, which progressively became
$ F$ C( K. U% b( R8 c! `1 _darker. She was also concerned about the enlarge-! `6 K3 m/ M" x3 j. e/ Y3 s5 d# J# }
ment of his penis and frequent erections. The child% W- Z& t/ i, T: R V4 j I
was the product of a full-term normal delivery, with) E4 t( F/ L; r% ]7 m* ^
a birth weight of 7 lb 14 oz, and birth length of
* }3 ~) q9 f6 ]. E D20 inches. He was breast-fed throughout the first year% W @ c3 y) P6 v$ E
of life and was still receiving breast milk along with
, k/ y" `/ h/ M* l4 W- wsolid food. He had no hospitalizations or surgery,
0 K$ t( N3 \: z. L% t" k% Aand his psychosocial and psychomotor development
! ~' d: D9 v" Mwas age appropriate.
! ], n% ]# o; }3 GThe family history was remarkable for the father,) l7 U, L' z: c
who was diagnosed with hypothyroidism at age 16,+ S& M& N& m) m
which was treated with thyroxine. The father’s8 @$ J. j2 S* R% e/ V; ^
height was 6 feet, and he went through a somewhat
( a4 m, \/ o2 w9 `8 Pearly puberty and had stopped growing by age 14.
& x6 a5 F- ]# n4 p! u$ QThe father denied taking any other medication. The- \! M* C7 h1 F! S+ O: D- ~8 G
child’s mother was in good health. Her menarche# B3 A- [' ^( A5 P) _
was at 11 years of age, and her height was at 5 feet7 C7 {& Z1 E, l, w. A
5 inches. There was no other family history of pre-
& A0 {- m& _) o3 W' U8 `cocious sexual development in the first-degree rela-
' [2 o9 F0 I( v% Y: Ntives. There were no siblings.) p. ~% C/ _; _$ A. ^
Physical Examination
- s& i; b# V8 A. {) |4 E0 uThe physical examination revealed a very active,
! y7 Z( b7 t: m! bplayful, and healthy boy. The vital signs documented2 M4 E7 H2 T+ ~3 ?$ e
a blood pressure of 85/50 mm Hg, his length was
. h! W% z# h8 M3 g90 cm (>97th percentile), and his weight was 14.4 kg# {& S( q) |* l1 f1 C
(also >97th percentile). The observed yearly growth
' r, `5 T1 p" y: [velocity was 30 cm (12 inches). The examination of
& w# b* `1 m3 x( c( @2 W1 l5 bthe neck revealed no thyroid enlargement.
+ f5 W# V7 A+ vThe genitourinary examination was remarkable for2 u3 j) `5 n5 @% u0 F) x# D# f6 O
enlargement of the penis, with a stretched length of6 u8 n# B4 u- I+ O1 l0 S9 N K8 a% o
8 cm and a width of 2 cm. The glans penis was very well9 ^6 V( y9 S2 i
developed. The pubic hair was Tanner II, mostly around
% |9 L5 f5 ]# ?- r540
. [5 D+ P- K6 K( mat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from c; I1 G4 J* u( c! x
the base of the phallus and was dark and curled. The! ~- K0 r/ q7 v6 A# z5 P
testicular volume was prepubertal at 2 mL each.
* J2 B5 v2 h4 g; `- {3 WThe skin was moist and smooth and somewhat
$ ^% f6 X! g( H" i* P8 Z' Y9 foily. No axillary hair was noted. There were no
/ H" o& U; w( w6 pabnormal skin pigmentations or café-au-lait spots.
; Z7 Z* V, E0 ^2 ]Neurologic evaluation showed deep tendon reflex 2+
% g) ?: d% O; qbilateral and symmetrical. There was no suggestion0 a4 t6 y: }% ]1 T
of papilledema., v% F2 I; Z7 \/ [' r
Laboratory Evaluation. \* u% J6 ]4 w* _
The bone age was consistent with 28 months by/ M8 y, z3 m' Z- r5 c4 @! q; K# q' c
using the standard of Greulich and Pyle at a chrono- R' Y$ A$ N* m+ ] Z: i: a
logic age of 16 months (advanced).5 Chromosomal
9 P$ S8 e. D6 u# Y- M6 c, zkaryotype was 46XY. The thyroid function test# |9 P6 C# Y+ G, ?) x, `6 m7 _
showed a free T4 of 1.69 ng/dL, and thyroid stimu-! F& G5 g3 [/ N: X) J
lating hormone level was 1.3 µIU/mL (both normal).
% N1 q |2 \% ~5 ]& f7 WThe concentrations of serum electrolytes, blood$ p4 j3 S( ~6 L+ g d0 N
urea nitrogen, creatinine, and calcium all were, |' o) _9 I9 n) s
within normal range for his age. The concentration: v' l* Q% ~" n& p6 o
of serum 17-hydroxyprogesterone was 16 ng/dL4 i8 \7 U: {$ f- S' j
(normal, 3 to 90 ng/dL), androstenedione was 20! t F* j, @% x6 @
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-$ D: c* r) |" E& j0 S0 b
terone was 38 ng/dL (normal, 50 to 760 ng/dL),6 [$ k& b. b' O% q' V7 Z7 M
desoxycorticosterone was 4.3 ng/dL (normal, 7 to5 k% `& n; `3 e2 h& k4 i; q
49ng/dL), 11-desoxycortisol (specific compound S)
# \+ U/ v, J8 G7 x# l3 xwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-: w9 ]- f8 ~9 V
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total3 ]* e4 Q$ V2 d4 j
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),; E: R4 V l6 b& e3 N- I$ i
and β-human chorionic gonadotropin was less than
% C1 m& y9 B" |2 X4 M o$ X* l5 mIU/mL (normal <5 mIU/mL). Serum follicular
* j4 j2 V# C7 C# k1 E! O5 hstimulating hormone and leuteinizing hormone
$ e& s( s1 P' k* f0 H% k/ Qconcentrations were less than 0.05 mIU/mL
& A2 _6 ~. h3 N! z" s(prepubertal).
2 V' U; Q6 Z1 Z, u! yThe parents were notified about the laboratory
+ ^; G5 t* e4 z7 @ o- |results and were informed that all of the tests were
( E; m0 l+ h- L: h' ]/ \3 znormal except the testosterone level was high. The
7 R4 K3 c+ d9 Nfollow-up visit was arranged within a few weeks to
5 n" g, V- M k. ?6 i( B9 qobtain testicular and abdominal sonograms; how-- |- ?; U9 O& {/ P* f* Y
ever, the family did not return for 4 months.
1 x9 r2 I/ U9 d) M5 c2 m8 W4 OPhysical examination at this time revealed that the
4 X2 |7 m& |: ^ {child had grown 2.5 cm in 4 months and had gained
6 H( h3 j3 m/ c/ H) ]2 kg of weight. Physical examination remained! M7 v4 V' M. B4 ` f+ ~
unchanged. Surprisingly, the pubic hair almost com-
v+ L* n2 A: p9 H& bpletely disappeared except for a few vellous hairs at
/ u: \0 @/ U6 y; K1 athe base of the phallus. Testicular volume was still 2
8 L7 u1 Q( w, `) A B. Q8 SmL, and the size of the penis remained unchanged.
7 W/ N$ b4 K5 {, s5 r. c7 VThe mother also said that the boy was no longer hav-
& \+ ]! F+ j/ L% A5 c+ Ning frequent erections.' h1 ]+ J( j) D L8 ]2 c
Both parents were again questioned about use of
x6 q8 B2 I' \- d/ S5 D% cany ointment/creams that they may have applied to
; L P, V; s% Rthe child’s skin. This time the father admitted the
% b s6 O( c& Z' a: P5 RTopical Testosterone Exposure / Bhowmick et al 5419 p) q7 |2 ~' `" o$ V6 A
use of testosterone gel twice daily that he was apply-0 E" |( V" m! F4 _9 e* D* f9 b
ing over his own shoulders, chest, and back area for
8 V: I: ~ B) ]5 D! p5 Ha year. The father also revealed he was embarrassed
. [; C" \) S# |0 E$ jto disclose that he was using a testosterone gel pre-
& ]- ?: d' L( K+ ]" }5 tscribed by his family physician for decreased libido
1 Q- U: {* g* A" ksecondary to depression.
0 R7 B- \) @ o p8 e1 \The child slept in the same bed with parents.; Z1 s+ O( _& M) t% \
The father would hug the baby and hold him on his
7 M" y; f) B9 Y$ C9 Dchest for a considerable period of time, causing sig-" U4 n4 @0 `5 R
nificant bare skin contact between baby and father.# C' G6 Q+ v' l9 A1 ]
The father also admitted that after the phone call,
4 ^& l u) _1 d6 |& |$ J. L! F6 Uwhen he learned the testosterone level in the baby8 b3 l5 e+ G- l Z" b
was high, he then read the product information
! t+ U) f# Z, y! U/ O" X1 ]packet and concluded that it was most likely the rea-+ ^% p$ q1 J- z
son for the child’s virilization. At that time, they
$ s+ x/ T. x3 I/ Kdecided to put the baby in a separate bed, and the, Q- y1 a. m5 H. V
father was not hugging him with bare skin and had4 |) ]" h# o1 w D
been using protective clothing. A repeat testosterone
# S# q: e( a5 E* i- d! Jtest was ordered, but the family did not go to the
" k0 v" R2 h& a" t& ~* C+ llaboratory to obtain the test.
* L! i4 {& y/ _Discussion
$ v5 ?% S7 E. B* C, f2 hPrecocious puberty in boys is defined as secondary( m. O8 \% l W/ S4 L$ ?: D
sexual development before 9 years of age.1,4& D' [3 I8 W/ H6 M6 U0 Q3 d P
Precocious puberty is termed as central (true) when4 w! {, J& T/ c' T
it is caused by the premature activation of hypo-
' N6 K4 S3 u4 j' M- Ythalamic pituitary gonadal axis. CPP is more com-' s4 ]# w" a# ~
mon in girls than in boys.1,3 Most boys with CPP# s3 {& V( k# h0 q3 J3 X! y
may have a central nervous system lesion that is
$ h u m* |9 x% g; W+ M' k7 F- Sresponsible for the early activation of the hypothal-
- L- y6 E% T- F5 L9 `2 aamic pituitary gonadal axis.1-3 Thus, greater empha-) }0 X+ ]# ^3 k7 N
sis has been given to neuroradiologic imaging in/ b; T/ w9 p, y( s
boys with precocious puberty. In addition to viril-
# T) V! \ k) L3 ~5 y6 Tization, the clinical hallmark of CPP is the symmet-
! d+ U5 T. i C4 V. [. Arical testicular growth secondary to stimulation by4 M1 Q+ p1 e; E) Y6 I1 t) `
gonadotropins.1,3
2 |' Y$ j, c6 I$ UGonadotropin-independent peripheral preco-1 l N2 H) S S% R% d" v
cious puberty in boys also results from inappropriate3 t7 G3 X `8 e% X4 f
androgenic stimulation from either endogenous or
' e$ t! j S/ T6 {8 U/ L. Pexogenous sources, nonpituitary gonadotropin stim-! K7 h1 H% U1 q$ P% b
ulation, and rare activating mutations.3 Virilizing
* r8 q; O7 k1 H+ ] icongenital adrenal hyperplasia producing excessive
' d6 k7 {; T0 v7 @$ ~adrenal androgens is a common cause of precocious
d' J% G0 L$ H) Zpuberty in boys.3,4
0 l f8 i6 J3 i1 [+ BThe most common form of congenital adrenal
2 e& E( O g: i; a2 _# I4 whyperplasia is the 21-hydroxylase enzyme deficiency.. b( [6 Y) ? `$ i* q/ f/ V6 R& y
The 11-β hydroxylase deficiency may also result in
$ b# |7 O% E5 O0 Q" g& o2 Rexcessive adrenal androgen production, and rarely,
' ^" T$ }6 e+ nan adrenal tumor may also cause adrenal androgen
" X X9 E! }! q7 K1 mexcess.1,3) M" u8 F! Y5 }: R( V) c* }8 Z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
- v1 {1 H- Q9 b6 G" S2 z b542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
) x" H/ ]- |& jA unique entity of male-limited gonadotropin-# b2 P- a* R2 [: M4 `7 u
independent precocious puberty, which is also known
/ f% Q+ `: S5 ^! c3 r, xas testotoxicosis, may cause precocious puberty at a
5 v' X4 ~7 g5 R' ?! Y4 I; Hvery young age. The physical findings in these boys
5 H B* B- Q8 E; ]+ swith this disorder are full pubertal development,
g" J7 P1 Q+ o W. Pincluding bilateral testicular growth, similar to boys( a, I8 ~& l! U5 u+ m% {/ h
with CPP. The gonadotropin levels in this disorder
4 _" S7 N1 P j; fare suppressed to prepubertal levels and do not show
3 h- {6 g6 F! {1 J% k( Hpubertal response of gonadotropin after gonadotropin-
1 P4 B7 v% \" Q+ |! d0 _) }6 greleasing hormone stimulation. This is a sex-linked
, W' d" G4 Z* A% ~ e+ q9 }autosomal dominant disorder that affects only; p) F; S1 o, f( {5 Y2 S q
males; therefore, other male members of the family# f& S9 a9 G$ q! m' L( m0 s
may have similar precocious puberty.3. @) w9 V) v5 _7 E: T ?
In our patient, physical examination was incon-
7 k- L: c/ U8 T6 D- K1 X Esistent with true precocious puberty since his testi-
) S' Q$ W5 x! s4 o" }: }5 ecles were prepubertal in size. However, testotoxicosis
$ o- }3 s8 \, V8 s4 m/ Lwas in the differential diagnosis because his father5 L" r5 |4 o2 h$ M4 x T
started puberty somewhat early, and occasionally,2 R4 ^9 A( _3 H1 z& o7 n
testicular enlargement is not that evident in the
7 M/ u" J1 E. I! ^0 J* O2 lbeginning of this process.1 In the absence of a neg-- n' d2 l7 y# w6 S
ative initial history of androgen exposure, our
& |" ?0 a' G' `$ `/ ^ W2 zbiggest concern was virilizing adrenal hyperplasia,: I" o5 r3 `4 y# ?% A9 b* s+ R
either 21-hydroxylase deficiency or 11-β hydroxylase; l% r9 y) }' p+ E/ Q% r% Q
deficiency. Those diagnoses were excluded by find-7 {* X2 z: U. V/ D1 c
ing the normal level of adrenal steroids.5 h* ?+ ^6 g* ^6 D0 ~
The diagnosis of exogenous androgens was strongly) j! x W d0 C$ F+ d
suspected in a follow-up visit after 4 months because0 h9 B) i8 Q8 \/ d) X
the physical examination revealed the complete disap-) i4 M1 ]+ n' N9 S5 @
pearance of pubic hair, normal growth velocity, and c8 M9 V/ k; E# t1 V
decreased erections. The father admitted using a testos-
$ ?: i. C& P# q4 Dterone gel, which he concealed at first visit. He was$ p/ W. x; |' G, b/ O; A/ A+ P) H
using it rather frequently, twice a day. The Physicians’9 T* w! X: z( Z, }- @1 u5 y7 @2 D( q
Desk Reference, or package insert of this product, gel or
( n0 T/ ^" }% L1 u& Ccream, cautions about dermal testosterone transfer to
+ i# s2 M! T3 W, q8 runprotected females through direct skin exposure.
8 y/ v2 K* P! _% f0 h* w& _# S+ qSerum testosterone level was found to be 2 times the
, p& A# j) b8 W1 O- F$ n6 k9 ]baseline value in those females who were exposed to
: k, |# F; v/ R/ Geven 15 minutes of direct skin contact with their male$ X' s8 @5 J! I4 N( |' \/ M& Z$ K$ d
partners.6 However, when a shirt covered the applica- ]. W& L; [$ ~; k; w9 l0 y; H4 t
tion site, this testosterone transfer was prevented., {2 }7 W1 m6 N5 N* T7 Y
Our patient’s testosterone level was 60 ng/mL,0 B7 s" Z9 E% e% G7 W0 T
which was clearly high. Some studies suggest that
3 @% w9 M) k& R& h U4 O& D' V; u8 zdermal conversion of testosterone to dihydrotestos-0 q5 d4 k& C0 a( W% ]# ^5 D) Y5 P
terone, which is a more potent metabolite, is more1 I* }5 z, R) g
active in young children exposed to testosterone h9 m x9 O) u$ ^* `; n
exogenously7; however, we did not measure a dihy-
" K4 f( R' v/ @1 F. v p2 p1 o, u6 kdrotestosterone level in our patient. In addition to
/ _6 d: j" ]. W* k& x2 Evirilization, exposure to exogenous testosterone in7 y' R, J( r+ y$ }: Z, H" V
children results in an increase in growth velocity and7 L; r. v# z; W$ _2 r$ \! X- n' Y" _
advanced bone age, as seen in our patient.
5 }- }9 v5 b" d0 m* ^8 K1 iThe long-term effect of androgen exposure during
' K# j2 b0 ?/ t* p4 learly childhood on pubertal development and final
: N4 {' b. b9 O/ ~: \adult height are not fully known and always remain
, ], C7 R4 E8 T g* `+ m3 aa concern. Children treated with short-term testos-/ A- g/ ~& ^: Q: X
terone injection or topical androgen may exhibit some9 G8 g6 U* M1 l7 P* T$ v
acceleration of the skeletal maturation; however, after3 m" G1 F) G1 a+ u
cessation of treatment, the rate of bone maturation
( g+ }* c# `: E6 u0 K0 X1 {" M4 d: qdecelerates and gradually returns to normal.8,9) Y3 }1 J- v& {( s: v' j, F; Q
There are conflicting reports and controversy
& f! @! _" q1 |: rover the effect of early androgen exposure on adult X4 s: o. M' R- e M
penile length.10,11 Some reports suggest subnormal% v( T" X$ j: o
adult penile length, apparently because of downreg-. _4 I3 a' F! `6 T
ulation of androgen receptor number.10,12 However,0 T- O2 c; _6 P& B9 b
Sutherland et al13 did not find a correlation between
+ }' ] {# K* v; [* ]childhood testosterone exposure and reduced adult
. z, g( m# c- i4 ]: P- s( Xpenile length in clinical studies. I1 z, m* P: h
Nonetheless, we do not believe our patient is+ o3 I8 C( a& z* F, W
going to experience any of the untoward effects from4 h$ U) O+ l+ H8 S) i1 O- N
testosterone exposure as mentioned earlier because: h* d( w: r8 G$ u9 N# X1 C1 }
the exposure was not for a prolonged period of time.
. i$ P/ J0 R* e0 x) K1 }+ k& oAlthough the bone age was advanced at the time of0 T8 K8 G1 S! Y9 L
diagnosis, the child had a normal growth velocity at
5 r6 W, M& O; A* S! uthe follow-up visit. It is hoped that his final adult9 o/ S% ~& P/ l% V
height will not be affected.
5 l6 v$ I$ {8 T! ZAlthough rarely reported, the widespread avail-3 V- |7 S$ d' m+ W- y6 U
ability of androgen products in our society may
0 L3 V" W# j! o$ G8 ^7 H2 ^2 t% ^indeed cause more virilization in male or female
s7 @& A3 |7 }& echildren than one would realize. Exposure to andro-) w' P. t$ f! a" Y4 Z0 R* g
gen products must be considered and specific ques-* Z# ~" t2 D1 z* }. l* T% q
tioning about the use of a testosterone product or
3 n/ U4 H. n* M* w I) ^" ]gel should be asked of the family members during& P0 ]# [( `+ W" T0 O) s8 H
the evaluation of any children who present with vir-
5 U3 W6 b R+ S e8 m3 N/ Filization or peripheral precocious puberty. The diag-, Z9 y+ b w1 i* Y! l+ _
nosis can be established by just a few tests and by! a* k& }& \+ y) M+ |* s' b
appropriate history. The inability to obtain such a( B2 T( ^1 |& t7 \; D$ N6 W" e/ P2 R
history, or failure to ask the specific questions, may- `" w( ]& w" U) o# H# [9 `
result in extensive, unnecessary, and expensive/ Q$ q8 \- x+ E
investigation. The primary care physician should be
. T2 o& z$ U* K4 [/ A" n. Haware of this fact, because most of these children3 K9 @, S( M2 f2 {" s: d: S
may initially present in their practice. The Physicians’
( Q( H7 D3 e1 d! uDesk Reference and package insert should also put a3 m! b& ^+ z. b3 k1 p
warning about the virilizing effect on a male or
, r& Z% M. h% [: l" Afemale child who might come in contact with some-7 G8 K# z' E+ F2 l: w- o
one using any of these products.
9 r1 d- W- l) }References1 M; t& o/ y) E8 L9 @
1. Styne DM. The testes: disorder of sexual differentiation" U" \5 Q% a: f2 @- ], x
and puberty in the male. In: Sperling MA, ed. Pediatric
1 J& @0 } O* ~8 `1 P9 HEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;: y, b7 x3 B2 z1 ^% i: D
2002: 565-628.3 I# {$ M" ]- \
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious1 m- ?* J! z, h. U
puberty in children with tumours of the suprasellar pineal
$ j) W7 g2 ~8 Q) z vat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, K0 T5 Q% u' e3 w1 o8 ~Topical Testosterone Exposure / Bhowmick et al 543& D6 N- h& p: G9 r
areas: organic central precocious puberty. Acta Paediatr.5 b7 G, {) P8 G2 X. O( H
2001;90:751-756., {, X( S* v2 X8 |- |( L2 v
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.; o7 k7 u. l# E! z& h3 @9 \2 V
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
: k- j8 x2 S- x/ b* {6 ZDekker Inc; 2003:211-238.
( b) N2 t0 c! x/ B( S) e6 w3 s4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual7 Y% A7 j) S: P
development in a two-year-old boy induced by topical
4 S0 R/ \4 F! @1 c2 C0 [exposure to testosterone. Pediatrics. 1999;104:e23.
) v7 }, x: L0 H: ?6 c5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
5 f! L/ r# A, G$ V9 R; K. `Skeletal Development of the Hand and Wrist. 2nd ed.
* p$ S) [: O" V0 h \# i/ Z$ m$ W4 aStanford, CA: Stanford University Press; 1959." a- }' E( I" W7 M5 M
6. Physicians’ Desk Reference. Androgel 1% testosterone,! y! G$ E) w/ a" q8 J9 Y
Unimed Pharmaceutical Inc. Montvale, NJ: Medical9 R6 R; L3 V5 p1 Q+ c, Q7 z
Economics Company, Inc; 2004:3239-3241.; n& a" m1 I( I/ {2 {7 P1 @
7. Klugo RC, Cerny JC. Response of micropenis to topical
5 |8 B3 K3 E7 w8 Etestosterone and gonadotropin. J Urol. 1978;119:% n! q* Z' r. Q& L- n
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