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is a significant concern for physicians. Central* J; m4 v% [8 G" k& J% E
precocious puberty (CPP), which is mediated
r- C2 ~- s. dthrough the hypothalamic pituitary gonadal axis, has
: Q g3 O& Q& ]& N: ?+ }/ V2 ra higher incidence of organic central nervous system
+ {3 Z! n7 o9 h- B( V% z. l7 llesions in boys.1,2 Virilization in boys, as manifested5 z% T* J0 j/ X! t0 i+ K$ Y
by enlargement of the penis, development of pubic% ^5 x/ ^7 V6 ]& @
hair, and facial acne without enlargement of testi-0 `3 _, [% I& ?# G% C1 b
cles, suggests peripheral or pseudopuberty.1-3 We: s# B2 }6 q! c' w& V. f: o! G
report a 16-month-old boy who presented with the2 h2 b; y- \) F# M6 {3 ^0 J
enlargement of the phallus and pubic hair develop-
( X, r& M' ]' I8 j; Fment without testicular enlargement, which was due
2 b; \8 a+ L& j: ^. Nto the unintentional exposure to androgen gel used by8 E, C5 F3 W" m+ Q+ B1 ~9 w0 X! r* z
the father. The family initially concealed this infor-' E6 H1 X$ q; T; t% w" k; I
mation, resulting in an extensive work-up for this
3 s' r8 [* S; P8 ~% D' Nchild. Given the widespread and easy availability of& z: d2 a- T) W3 d! `7 V- H+ \
testosterone gel and cream, we believe this is proba-
! J- Z; S6 l/ Y% O# p' @bly more common than the rare case report in the
w/ a, |7 c5 h, m5 kliterature.4 ^8 S, Y0 P: a% \7 f" V
Patient Report
- S& @3 {+ A' t G4 ]1 eA 16-month-old white child was referred to the
, W! r0 P: g" ^7 e, S% ]9 ]endocrine clinic by his pediatrician with the concern. R0 p$ k* A9 o( Q) G7 i
of early sexual development. His mother noticed2 v, c b( J* q4 j- S) W
light colored pubic hair development when he was; e+ g! f: y) B) x& C
From the 1Division of Pediatric Endocrinology, 2University of
2 a1 U A" P2 j9 K. U ISouth Alabama Medical Center, Mobile, Alabama.
8 N5 ?! W, d0 a6 ?( AAddress correspondence to: Samar K. Bhowmick, MD, FACE,
! \ _4 {" ^4 ^& e: BProfessor of Pediatrics, University of South Alabama, College of
5 J# r' Y" r* |, B6 `- ]5 P1 mMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;7 _9 {" Q6 V+ e+ n, `9 b
e-mail: [email protected].
, D) ]7 W$ |# }4 babout 6 to 7 months old, which progressively became
; f" N# G' [$ E; U( _/ \darker. She was also concerned about the enlarge-$ |0 J( l: }( T7 x* A
ment of his penis and frequent erections. The child) U1 N+ y% N0 ^+ ?& l2 e
was the product of a full-term normal delivery, with
. c* n, E. d- O1 k7 Ka birth weight of 7 lb 14 oz, and birth length of
5 f0 A0 U% x$ t9 ]% s/ t8 J) w20 inches. He was breast-fed throughout the first year9 _7 ]0 R* V x5 r* ?2 C
of life and was still receiving breast milk along with h$ @# U, C! X: Y. V3 ]5 F
solid food. He had no hospitalizations or surgery,. d' ^* X! e0 T, w
and his psychosocial and psychomotor development$ t9 r+ A, a0 y
was age appropriate.2 W6 f: k4 z2 B7 U5 t
The family history was remarkable for the father,( S9 B" v/ O$ _4 i+ s
who was diagnosed with hypothyroidism at age 16,
$ E, N) t6 m i0 _which was treated with thyroxine. The father’s
# g2 M2 c$ h/ T. d# w( u( h5 d6 ]' kheight was 6 feet, and he went through a somewhat
" h# @) I7 O( x% h3 E: c0 Xearly puberty and had stopped growing by age 14.: Z2 P- B# D+ o' a
The father denied taking any other medication. The8 c7 }) N5 @5 i, v' J. P$ w
child’s mother was in good health. Her menarche! G+ U. o& b+ M; n. b- B
was at 11 years of age, and her height was at 5 feet! p# l: a( m0 S
5 inches. There was no other family history of pre-
" k$ D9 m/ p L tcocious sexual development in the first-degree rela-
) R9 |! d/ S0 Ztives. There were no siblings.
! b. U4 p" D& x) }& c7 l8 ~$ VPhysical Examination
5 |# f Q0 X- ~& T: H: e# Y9 |The physical examination revealed a very active,! U% [7 ?6 d! \9 \* I
playful, and healthy boy. The vital signs documented8 E0 M( D! h; f- n u2 E# r' |
a blood pressure of 85/50 mm Hg, his length was4 j m& x" A% j: ~) f( Q; {! A) K
90 cm (>97th percentile), and his weight was 14.4 kg
' O% j( s: Q% t/ ~& Z6 r1 `% U(also >97th percentile). The observed yearly growth
+ A( B; e- Q, U- vvelocity was 30 cm (12 inches). The examination of& v! Y' c/ `( u' Y6 Z
the neck revealed no thyroid enlargement.3 K+ g) \8 h- j( \$ L6 f. k
The genitourinary examination was remarkable for- P+ ~0 u+ p+ ?
enlargement of the penis, with a stretched length of& e: L$ ~# D+ ^# u, u
8 cm and a width of 2 cm. The glans penis was very well' N9 S7 r2 h, n
developed. The pubic hair was Tanner II, mostly around
1 a. J$ t8 y; p; N" n5 X" B540" {, d2 F' g) C# w. z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ Y4 J* K% R) Z5 ^1 tthe base of the phallus and was dark and curled. The
1 F# O U- {% O# z2 x7 gtesticular volume was prepubertal at 2 mL each.
9 j5 h' p2 N4 J: A1 \The skin was moist and smooth and somewhat
2 r& S! F G& q0 q) hoily. No axillary hair was noted. There were no7 ^: c* A0 U8 v# x/ J P7 s1 ^
abnormal skin pigmentations or café-au-lait spots.0 u2 C' z1 o+ x5 V; V
Neurologic evaluation showed deep tendon reflex 2+0 Z T m3 k" d6 D# w1 R/ c
bilateral and symmetrical. There was no suggestion; ]2 H- \- Y1 K1 F7 k" @+ A
of papilledema.
6 H: R f6 o9 M7 I& I1 d! V9 } KLaboratory Evaluation, d7 C' a9 a6 ~' u
The bone age was consistent with 28 months by
: J; g1 [6 q$ l7 Q1 ousing the standard of Greulich and Pyle at a chrono-+ c4 h/ o; c8 c5 L4 c
logic age of 16 months (advanced).5 Chromosomal/ C h) q, \& B' O" _9 \. o
karyotype was 46XY. The thyroid function test
/ I+ x7 ?9 |. P! V: c* Lshowed a free T4 of 1.69 ng/dL, and thyroid stimu-" o+ G- Q: W% Y! u/ o+ m
lating hormone level was 1.3 µIU/mL (both normal).
5 F% @+ |8 F* e3 F' @& \7 b. oThe concentrations of serum electrolytes, blood
4 i8 I, L0 T; T- ^. surea nitrogen, creatinine, and calcium all were) R9 S1 P/ P( S4 ^+ p9 v
within normal range for his age. The concentration2 x X# o% }$ q( ~2 t! p/ e7 L
of serum 17-hydroxyprogesterone was 16 ng/dL
$ e) e$ V$ t" U2 b9 e( r(normal, 3 to 90 ng/dL), androstenedione was 202 I# H4 ^1 f0 |5 i
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
3 Q2 T9 |1 l6 j+ x+ Z* Q3 Y% f+ jterone was 38 ng/dL (normal, 50 to 760 ng/dL),
l. h9 W( }# j0 Ydesoxycorticosterone was 4.3 ng/dL (normal, 7 to
: k/ }: `/ L, M: ^49ng/dL), 11-desoxycortisol (specific compound S)
0 y% o9 K$ g& V- x8 l, D6 O( Nwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
+ w T1 T. R% I2 s, A1 }- z) w* Xtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
6 N) r9 s' y( n# \: Ktestosterone was 60 ng/dL (normal <3 to 10 ng/dL),7 `6 H$ y Z: d" t" u n
and β-human chorionic gonadotropin was less than
- C Y* Y. }8 X* K4 Y5 mIU/mL (normal <5 mIU/mL). Serum follicular( n9 T/ y o/ |! Q* n9 y
stimulating hormone and leuteinizing hormone+ M$ r& o- r) B+ W, ^! c
concentrations were less than 0.05 mIU/mL
# V# \$ l3 V: L9 M( ?" m# g/ u(prepubertal).
, A- ]) u. z2 eThe parents were notified about the laboratory
k) G% T! o6 |& k7 E! S' bresults and were informed that all of the tests were
/ P" ?5 e# r4 J# ~- m% a6 B" Inormal except the testosterone level was high. The5 @: z; l Y$ {6 T
follow-up visit was arranged within a few weeks to0 i( Z/ K* Q( l/ W, P
obtain testicular and abdominal sonograms; how-
7 l/ l1 f, S dever, the family did not return for 4 months.
) j3 e a3 l$ {/ v/ i4 `Physical examination at this time revealed that the
0 d# b! T+ ~4 Q W/ Dchild had grown 2.5 cm in 4 months and had gained
* _ l# h9 i# v# H4 A2 kg of weight. Physical examination remained
+ U+ R/ i! J% }unchanged. Surprisingly, the pubic hair almost com-( ?) a# `3 L! ~$ P
pletely disappeared except for a few vellous hairs at3 @6 f" C# p% C4 g3 ^9 P/ {( X
the base of the phallus. Testicular volume was still 21 D) D: ^% A; ]2 i7 [" q3 z
mL, and the size of the penis remained unchanged.
* j# ~) i- s1 B1 u4 SThe mother also said that the boy was no longer hav-
- \6 O+ i- H# j- Z3 v2 N5 k5 Fing frequent erections.! L/ p) H8 h3 [! G
Both parents were again questioned about use of
$ Q$ m. O* |& _+ Pany ointment/creams that they may have applied to( k4 M0 M4 {8 U1 H/ F: J
the child’s skin. This time the father admitted the/ V. `7 f; L. k( W
Topical Testosterone Exposure / Bhowmick et al 541
+ F7 H$ ^0 f7 K$ {3 Suse of testosterone gel twice daily that he was apply-
; b B7 ~9 ]) g$ {! j' ping over his own shoulders, chest, and back area for
9 ]2 K9 b" {+ u1 P3 h3 la year. The father also revealed he was embarrassed
8 S2 y7 H6 @) R+ Nto disclose that he was using a testosterone gel pre-5 l/ F) P! O- o
scribed by his family physician for decreased libido
5 L" _# r) n; Q/ T. G9 M& t* u0 Jsecondary to depression.
2 A6 V1 w, h5 m! j6 _The child slept in the same bed with parents.
# H) N, k% X7 g2 l# yThe father would hug the baby and hold him on his
3 P5 |& w- A+ c- \chest for a considerable period of time, causing sig-1 ^& @5 l3 I) l% ?2 ?
nificant bare skin contact between baby and father.
4 R: g* d. q' h _$ aThe father also admitted that after the phone call,4 o7 s/ }9 s# E
when he learned the testosterone level in the baby
, ? v! S3 X- L( F$ r: Q0 {was high, he then read the product information
/ }* p" Y) E0 rpacket and concluded that it was most likely the rea-: }, p" x& _0 ~" X. }! X
son for the child’s virilization. At that time, they- K- A& t' z# v- G: P* f
decided to put the baby in a separate bed, and the1 g! W; Y$ ]- H7 E8 i7 M& z4 E
father was not hugging him with bare skin and had
6 p6 N9 Q" i2 d. i# p. O% _been using protective clothing. A repeat testosterone
& f9 z4 u, e; p" Y5 vtest was ordered, but the family did not go to the
+ Q5 W* I2 Y+ r3 Tlaboratory to obtain the test.* F2 u4 G( @6 k
Discussion. l) U! B/ D6 i6 `3 G/ I0 x# \
Precocious puberty in boys is defined as secondary; R$ K( n* b& s( U9 y1 L7 ~! B
sexual development before 9 years of age.1,4
/ p1 o4 O. |0 z# `Precocious puberty is termed as central (true) when8 C- R9 d& x( N3 S8 b+ A
it is caused by the premature activation of hypo-
& V. x! K% R. ~1 z- Ythalamic pituitary gonadal axis. CPP is more com-
4 \0 W' S9 d5 [: t i: P; Smon in girls than in boys.1,3 Most boys with CPP
+ g p2 p. W$ P L1 kmay have a central nervous system lesion that is
& C, H3 n% Q/ N2 q* ~+ @responsible for the early activation of the hypothal-, x( @" ]5 W/ }7 [. j! k
amic pituitary gonadal axis.1-3 Thus, greater empha-
4 w( @6 c' B' f2 ?" @sis has been given to neuroradiologic imaging in, }# t+ s5 `0 [- @& _7 A! X
boys with precocious puberty. In addition to viril-. {/ X5 L0 k! A k, t5 Z4 b- c* g
ization, the clinical hallmark of CPP is the symmet-: J8 p) ~3 H& f( \$ v
rical testicular growth secondary to stimulation by7 x$ p) A- b. v) w5 A
gonadotropins.1,3: Q" I) K- ~: c4 A0 s
Gonadotropin-independent peripheral preco-* ^! c o5 z1 `: R# M; f) a
cious puberty in boys also results from inappropriate
3 T- n& W( N8 D1 i8 `9 randrogenic stimulation from either endogenous or0 K' b* f# V5 m U; G2 {3 y9 `7 N. A
exogenous sources, nonpituitary gonadotropin stim-3 a1 w" I3 a& a/ G+ d3 z
ulation, and rare activating mutations.3 Virilizing7 ^( Z9 {/ o: v$ f5 R# ]' G- d6 ^# P
congenital adrenal hyperplasia producing excessive
# o8 X6 d4 P$ Z- h8 ]* G; ^! badrenal androgens is a common cause of precocious
- T7 z+ S8 o8 F9 i$ T, q8 K+ xpuberty in boys.3,4
" H- O8 K9 P8 K+ s# G/ S8 _The most common form of congenital adrenal; p7 b$ }3 G6 m+ f# s
hyperplasia is the 21-hydroxylase enzyme deficiency.
8 T- r4 i8 X6 z4 vThe 11-β hydroxylase deficiency may also result in
* E: M& ^# R( N* ]3 r1 S4 Z1 c7 v/ }. uexcessive adrenal androgen production, and rarely,
5 K6 g( T; _' j% ~0 Nan adrenal tumor may also cause adrenal androgen! N2 o0 N6 k6 \
excess.1,3
Q( e- k% u* b. R; ~/ Aat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 o3 {) a* D4 A2 |542 Clinical Pediatrics / Vol. 46, No. 6, July 2007; ]; I, A: n9 p- g' k, M8 w7 t
A unique entity of male-limited gonadotropin-+ X: v( e. m s
independent precocious puberty, which is also known
) S+ {$ x1 |! A% _as testotoxicosis, may cause precocious puberty at a/ q/ ?9 ]! K' M4 W! T: @
very young age. The physical findings in these boys
. N2 _) b$ z, @/ ]with this disorder are full pubertal development,, ~$ I5 K. f/ ~' a' B6 k1 P% x$ [
including bilateral testicular growth, similar to boys
) Y* `6 X6 P$ `2 _+ P: h9 x% Rwith CPP. The gonadotropin levels in this disorder& i/ @3 \/ a4 v9 ]& ^
are suppressed to prepubertal levels and do not show
# t8 r% m; b! P/ |! xpubertal response of gonadotropin after gonadotropin-
: j$ n2 | F5 hreleasing hormone stimulation. This is a sex-linked
2 g5 B0 |8 z" x2 I8 ?autosomal dominant disorder that affects only
' j% J( n! J, [2 |males; therefore, other male members of the family
; |- Y6 x5 ]8 b( I4 ~/ B: q: f9 Emay have similar precocious puberty.3
0 W; ~9 Q# \0 m8 H+ `In our patient, physical examination was incon-% F/ c: A6 I, u
sistent with true precocious puberty since his testi-
, I' e- `" ^" s$ ]: e( Q9 ]& Scles were prepubertal in size. However, testotoxicosis
( h5 `. }: |3 N! h* i- Twas in the differential diagnosis because his father
! u6 i$ x: W6 }) z$ ~7 dstarted puberty somewhat early, and occasionally,) |# O' X! S. d6 ~6 e7 G2 {
testicular enlargement is not that evident in the% [5 K! y1 v$ g- c: N
beginning of this process.1 In the absence of a neg-7 |) `- r' t2 X! Y$ }
ative initial history of androgen exposure, our. o: _- d/ E& j1 R l& f3 ~2 r" X
biggest concern was virilizing adrenal hyperplasia,
# [7 {- g4 T: m: T& Ceither 21-hydroxylase deficiency or 11-β hydroxylase
L1 b/ h! H# M4 @: s; cdeficiency. Those diagnoses were excluded by find-
/ O4 I$ U: Z/ C4 J, `! eing the normal level of adrenal steroids./ }2 {' q! ?. m$ c% `* M
The diagnosis of exogenous androgens was strongly* J7 c D& j* V' X
suspected in a follow-up visit after 4 months because0 R5 O3 p* J+ U- p/ X7 D; p
the physical examination revealed the complete disap-% t8 a' z9 }$ Z4 ]
pearance of pubic hair, normal growth velocity, and
' t: v& f# ^( u- ?9 X6 |4 R% Rdecreased erections. The father admitted using a testos-
* |* F# S. x6 U( @. x! iterone gel, which he concealed at first visit. He was
: D+ A7 d* m; S( vusing it rather frequently, twice a day. The Physicians’
0 ^& \$ G( ~* J. m9 ^8 x% d. `Desk Reference, or package insert of this product, gel or9 E& l6 @& ]% [' B! g- V
cream, cautions about dermal testosterone transfer to4 f$ K [! X3 U$ w
unprotected females through direct skin exposure.4 R+ |$ G, v- j
Serum testosterone level was found to be 2 times the, a `5 C" N+ I7 n `4 n$ @5 L
baseline value in those females who were exposed to
9 d# L# ?! @( d/ J( d& Neven 15 minutes of direct skin contact with their male7 _- d0 w* ?* |& P
partners.6 However, when a shirt covered the applica-
! Q V# t9 w5 V" I0 n1 @tion site, this testosterone transfer was prevented.8 [, q4 B( D( A4 `
Our patient’s testosterone level was 60 ng/mL,6 y4 }4 Y4 g8 p7 y R, l) f
which was clearly high. Some studies suggest that& [& @' u" |- T) o
dermal conversion of testosterone to dihydrotestos-: N' {2 I7 V5 [/ l' |
terone, which is a more potent metabolite, is more/ Z( p& u3 u' j9 q
active in young children exposed to testosterone
3 i) i* M) S! I# H/ U. V2 `exogenously7; however, we did not measure a dihy-
2 U/ ]" Z; k& p* w f: L# S- d2 G, w8 fdrotestosterone level in our patient. In addition to
, d) }3 d s# F d' o) ^( s" |/ Qvirilization, exposure to exogenous testosterone in" W1 o* J" z0 w3 _$ o& ^/ O8 D$ F
children results in an increase in growth velocity and
" K# }3 h) X6 u I! a; d4 uadvanced bone age, as seen in our patient.( S, ^$ U2 }4 B
The long-term effect of androgen exposure during( v* g1 ^% }( S7 R9 E: ~) w) R
early childhood on pubertal development and final {, j, B8 f& q- g& E
adult height are not fully known and always remain8 D# c: Q& |9 ]) I0 P
a concern. Children treated with short-term testos-
! A; Y% e% `0 Xterone injection or topical androgen may exhibit some
0 y$ Y) P+ v3 _4 W3 S% hacceleration of the skeletal maturation; however, after
% |9 V& a5 l2 L5 B3 m6 Ccessation of treatment, the rate of bone maturation2 E$ f- O2 e G; [0 Z* R1 t) s" Z+ S
decelerates and gradually returns to normal.8,97 H) Y5 L6 W& ?# u' ?& L# i. G
There are conflicting reports and controversy
" B a/ ^9 K0 Q- n. ?4 a1 }; [' |+ Aover the effect of early androgen exposure on adult$ A: x9 |6 c6 K/ D- g" N$ S
penile length.10,11 Some reports suggest subnormal- }9 u0 g4 S0 ]4 l9 ?9 e0 G7 k6 O
adult penile length, apparently because of downreg-* D0 M5 j& z! h
ulation of androgen receptor number.10,12 However,/ k) H5 w0 Z8 A) h3 ~+ E9 E
Sutherland et al13 did not find a correlation between1 D, Q/ n# p7 i$ w' m2 n/ C
childhood testosterone exposure and reduced adult) A$ o& }* `# c- X5 b x
penile length in clinical studies.
) F1 y: f" ~. q$ q3 y. J" lNonetheless, we do not believe our patient is( Q1 y U! ^; R7 i0 w8 w
going to experience any of the untoward effects from
4 r; |* D, d' ]) G1 Ytestosterone exposure as mentioned earlier because
/ @! T v; ^7 b1 S3 _4 ` A, a, K0 c9 Zthe exposure was not for a prolonged period of time.
" U3 M. r: }! r# M8 ]! B- d5 @Although the bone age was advanced at the time of# F5 L* ]* h8 E0 `+ I
diagnosis, the child had a normal growth velocity at$ p9 i8 a+ C! O# Q; I. X4 r& M, m
the follow-up visit. It is hoped that his final adult
2 l- s" w# b+ m: D' |" xheight will not be affected. _8 x7 z/ f# {5 r! c8 f
Although rarely reported, the widespread avail-
( A0 Z: y: i) o! c) @ability of androgen products in our society may
' }9 D/ m3 ]( s: @- n& |6 E9 Hindeed cause more virilization in male or female
( }( k e; i! y& A/ S8 Xchildren than one would realize. Exposure to andro-- L- Z' d, a1 W& F1 [, S5 S* x; M
gen products must be considered and specific ques-( s7 {- P {; c# D- V7 n
tioning about the use of a testosterone product or% E& ~% @% |# p* n- M
gel should be asked of the family members during4 t2 f$ P$ L5 ]6 S) v
the evaluation of any children who present with vir-8 ?$ E6 |8 p+ x% _9 O8 ]
ilization or peripheral precocious puberty. The diag-
6 r4 h; }( z9 jnosis can be established by just a few tests and by
$ E3 D, l2 o) g7 j: Kappropriate history. The inability to obtain such a
, q4 x/ x8 O" x- S3 |& _% n8 ]history, or failure to ask the specific questions, may! ^4 M1 |0 f$ |4 J
result in extensive, unnecessary, and expensive: {4 g5 B' S9 M' k1 s/ t
investigation. The primary care physician should be5 g, P' R7 R3 f, s5 E, f: r
aware of this fact, because most of these children
' U9 b: _! V; ^. q# Zmay initially present in their practice. The Physicians’
* V3 v. f' x3 j' wDesk Reference and package insert should also put a* _0 R; t7 n# ^6 v; r
warning about the virilizing effect on a male or9 [: H! V7 N. P/ R5 V
female child who might come in contact with some-1 k! |+ S4 G( y/ j
one using any of these products.3 m3 w8 n; M. z5 n' o1 A
References
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- y+ O |: a1 \9 L/ L" U* oand puberty in the male. In: Sperling MA, ed. Pediatric
1 Q: g; C6 [: oEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
# F1 I* f* b3 a( s2002: 565-628.9 T! _! D$ k I' r) N* T/ E
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
) I2 j2 f4 [3 d, \puberty in children with tumours of the suprasellar pineal
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# S }8 r) Q% |1 B' A! ~areas: organic central precocious puberty. Acta Paediatr.
- n+ I+ _& X# B2001;90:751-756.3 `8 l$ f p5 f& \! X7 `* m
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual0 v3 r% E6 s( J5 T' y: O4 F
development in a two-year-old boy induced by topical
% K* v2 D. Z% ~: k, X1 h# h- Iexposure to testosterone. Pediatrics. 1999;104:e23.
& h1 B1 N# R- y) Q! a( F( W& z5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
' @* n+ o/ M8 bSkeletal Development of the Hand and Wrist. 2nd ed.
) }. x5 p" d/ j1 eStanford, CA: Stanford University Press; 1959.$ A2 \' v! m/ _4 T+ ]# C
6. Physicians’ Desk Reference. Androgel 1% testosterone,
! ~1 ~ f3 O' _& h! X/ dUnimed Pharmaceutical Inc. Montvale, NJ: Medical
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