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is a significant concern for physicians. Central r& \7 d; d. v/ U; [& \# E( |4 s
precocious puberty (CPP), which is mediated4 u9 q* S4 G# z8 z1 u
through the hypothalamic pituitary gonadal axis, has8 z; j# h: d! x' c! ]/ P
a higher incidence of organic central nervous system
& `+ E. z/ [. Y$ h1 Vlesions in boys.1,2 Virilization in boys, as manifested
) E, ]3 S) V' G+ `% @by enlargement of the penis, development of pubic
]; B. h) C) X: R2 S* \hair, and facial acne without enlargement of testi-$ t* k. \* W/ y5 I! ~0 X
cles, suggests peripheral or pseudopuberty.1-3 We5 C9 c9 A) T6 j2 C8 J
report a 16-month-old boy who presented with the
& j' z7 }. i: H4 c' O( Eenlargement of the phallus and pubic hair develop-- T5 t' g7 x' R. x5 H+ v" h: D
ment without testicular enlargement, which was due
6 a& S. m& D" q, A+ uto the unintentional exposure to androgen gel used by9 h: E8 w: V8 z9 |, ^
the father. The family initially concealed this infor-
. `0 P* y- x0 _; k+ ?' D- F# Bmation, resulting in an extensive work-up for this B' B' k4 ^7 w3 _/ @& M: J
child. Given the widespread and easy availability of
& c6 F, B" m$ G! E" R+ jtestosterone gel and cream, we believe this is proba-
( h1 r* `4 n0 ^3 s( B1 ybly more common than the rare case report in the
5 D9 ` `0 n6 x0 d2 fliterature.4
5 I6 p9 O( W, l4 sPatient Report
& o f5 Q; M- K0 N- lA 16-month-old white child was referred to the
& h2 I4 \' u) n, l! Dendocrine clinic by his pediatrician with the concern
q! O6 q+ S3 }) R0 ^of early sexual development. His mother noticed: Y6 C1 A+ u' F: w+ ^' K
light colored pubic hair development when he was( O# G N1 d" U1 g9 Q0 J& ]
From the 1Division of Pediatric Endocrinology, 2University of, X( Q& s' ~8 {' i! I( k% z
South Alabama Medical Center, Mobile, Alabama.! F; ?) ?1 r* G" D* w
Address correspondence to: Samar K. Bhowmick, MD, FACE,
6 L- ?; u" n( V& y5 W* {Professor of Pediatrics, University of South Alabama, College of* l# M+ n# z8 j* P# x6 J; ]3 p/ o
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
3 O. E+ N8 _0 W0 {4 X3 Ae-mail: [email protected].5 P/ L# V; G* Z! g: g! M
about 6 to 7 months old, which progressively became/ r# _3 @2 {% `* t# E
darker. She was also concerned about the enlarge-
* P+ w8 k" F7 ~$ \2 \ment of his penis and frequent erections. The child
. L% r4 K: Y9 ?: b2 ^was the product of a full-term normal delivery, with
2 `1 `; a8 {9 U( o; q- ua birth weight of 7 lb 14 oz, and birth length of N' }* N9 M7 x! Y X& X
20 inches. He was breast-fed throughout the first year
/ k% L: H6 D6 U0 [% ^) X# Rof life and was still receiving breast milk along with7 Q$ d5 J# p8 ~; v% F# S
solid food. He had no hospitalizations or surgery,
/ j% D1 v: `1 G; k& sand his psychosocial and psychomotor development1 D9 p0 p m6 V K0 f' ~" V' f
was age appropriate.
4 P4 g$ U, Y% V8 XThe family history was remarkable for the father,
1 v; w d8 h. `5 W8 iwho was diagnosed with hypothyroidism at age 16,
, e; g6 m0 _" W- M! Nwhich was treated with thyroxine. The father’s5 d* L) w4 p% @/ K- w7 n
height was 6 feet, and he went through a somewhat! V* D% u1 \# N9 a' k7 @5 B( T
early puberty and had stopped growing by age 14.
4 _( e% R1 s) L0 g, [) c) z5 h4 r) uThe father denied taking any other medication. The
7 h1 Y5 b& H1 C' T* n' t) \child’s mother was in good health. Her menarche9 d! V9 G8 o: f6 j1 a
was at 11 years of age, and her height was at 5 feet
2 x# [2 O$ @/ O% E1 l' n5 inches. There was no other family history of pre-- j( |) ^+ d9 i' G: o# G
cocious sexual development in the first-degree rela-
1 ]; e3 M( [" f7 u8 ztives. There were no siblings.! O7 X2 |9 w% M& M2 r
Physical Examination
, v% n% n* c5 z7 F7 T4 h, t2 sThe physical examination revealed a very active,
5 q3 x# |8 c5 J/ @' t u( X# Wplayful, and healthy boy. The vital signs documented
* Z# u' t6 T6 u9 p2 y7 {" j0 ^a blood pressure of 85/50 mm Hg, his length was5 j0 B' T, O2 a# j$ J3 {
90 cm (>97th percentile), and his weight was 14.4 kg' ~# C7 N9 r" B* |; D5 d
(also >97th percentile). The observed yearly growth5 b- t) A2 z8 H
velocity was 30 cm (12 inches). The examination of- m/ ]) O* u$ G$ S" M4 `
the neck revealed no thyroid enlargement.5 n: ]$ U( z5 t! n+ b4 d0 X7 S
The genitourinary examination was remarkable for1 k; Z6 @. q' l/ Z- b
enlargement of the penis, with a stretched length of1 v# }2 c" T0 W0 d% D: G' X1 j5 t
8 cm and a width of 2 cm. The glans penis was very well; n, Z: s- t+ o$ r
developed. The pubic hair was Tanner II, mostly around
, g# {8 Y$ u! N `" K" m6 h540! k6 g' O. S$ n, K6 f% [: C
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 x/ [- A1 y& @7 k* j7 h9 w
the base of the phallus and was dark and curled. The
2 Y4 E- ^4 T" ^4 ^; M f# stesticular volume was prepubertal at 2 mL each./ U6 `/ I8 S- r9 m3 ]. W \0 n
The skin was moist and smooth and somewhat
- ?6 t, M# z" h. ]* Q. Roily. No axillary hair was noted. There were no: u+ f+ Z* \' M+ q! E! V. q8 I5 _
abnormal skin pigmentations or café-au-lait spots.1 y3 M8 @; @- y) h1 _. p3 z, Q
Neurologic evaluation showed deep tendon reflex 2+! ?/ j: E: a) u$ V
bilateral and symmetrical. There was no suggestion
: R. `* E8 X% @5 ~4 ]2 b7 E# qof papilledema.
6 {. H# j7 k, V0 G5 g) B' ]Laboratory Evaluation
: l1 |# y' m o& ^" LThe bone age was consistent with 28 months by
5 r8 a: o G; ?' u8 z7 Q( M" Eusing the standard of Greulich and Pyle at a chrono-
/ m$ {, S, b; U$ V8 Qlogic age of 16 months (advanced).5 Chromosomal
; m: ^0 \) H& k8 l# t4 N( Tkaryotype was 46XY. The thyroid function test
( j+ K2 s' Z- Nshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
& u" _; l: ^( A" J& m5 klating hormone level was 1.3 µIU/mL (both normal).2 e3 ]3 V9 Y6 e9 N! |) R- O
The concentrations of serum electrolytes, blood4 M* l A$ j0 `6 x: t, K6 l" u
urea nitrogen, creatinine, and calcium all were7 L5 P% c, h$ C. ]
within normal range for his age. The concentration7 h0 z1 w: B7 ] F
of serum 17-hydroxyprogesterone was 16 ng/dL0 q- E" W9 ^8 T9 p% ^
(normal, 3 to 90 ng/dL), androstenedione was 20
/ f! ?& |' Z9 F+ i- [4 M2 qng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
2 G1 v2 m3 u: i: \# M h0 mterone was 38 ng/dL (normal, 50 to 760 ng/dL),! ?% ?/ n1 z3 P: H/ x% S6 b/ ]1 [, c
desoxycorticosterone was 4.3 ng/dL (normal, 7 to* x" q, Q; U, f3 R4 i. ?
49ng/dL), 11-desoxycortisol (specific compound S)
, ?$ x# i2 b% a$ U7 B: ?9 Nwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
' W9 T* E; Q% ~& Ttisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
# d, u2 O2 U0 K9 Otestosterone was 60 ng/dL (normal <3 to 10 ng/dL),: c) a, [ i, a \: i( F
and β-human chorionic gonadotropin was less than' W3 ~& K- F$ b. y$ w
5 mIU/mL (normal <5 mIU/mL). Serum follicular' U0 u! H' n, M! ~
stimulating hormone and leuteinizing hormone
0 _' e! K W1 q/ c* D( b+ t% Lconcentrations were less than 0.05 mIU/mL
3 J# W6 b8 |5 R6 j" {& [(prepubertal).- X9 d& g1 v+ I+ i' v6 p+ w
The parents were notified about the laboratory, H% U% P" \+ s1 `1 ~+ T
results and were informed that all of the tests were1 U6 G$ H+ n" l9 Z, N k) \
normal except the testosterone level was high. The, M+ B" t# G1 |* u9 }: x- m- Z1 K
follow-up visit was arranged within a few weeks to
; y" y5 o1 h5 P+ U3 ^) S! n, iobtain testicular and abdominal sonograms; how-
% L. d1 o' l* [6 sever, the family did not return for 4 months.
' t: S+ E7 Q" @& ^8 F5 NPhysical examination at this time revealed that the
4 L. p- X8 i, }5 r! Ochild had grown 2.5 cm in 4 months and had gained
. L1 X# {% F4 i7 Q: Z' T9 \" A2 kg of weight. Physical examination remained4 ^% r3 |% {+ j; x. D& B9 m- w6 z7 I4 a
unchanged. Surprisingly, the pubic hair almost com-
( g/ `6 R' b! m' H+ F1 x$ opletely disappeared except for a few vellous hairs at/ L- ? K' ?' M0 E5 E: M/ Z# k! L
the base of the phallus. Testicular volume was still 24 F, Z" }9 O: E) ?0 x5 z1 ]# X( K
mL, and the size of the penis remained unchanged.
5 |, N. M* G9 aThe mother also said that the boy was no longer hav-
" h$ {1 @; N0 l* N& v, V% q! A4 Fing frequent erections.! e& k$ Y( _7 F1 p
Both parents were again questioned about use of
# k) Y* ^3 G, h6 G+ o5 kany ointment/creams that they may have applied to
6 Y! h7 h; g0 Tthe child’s skin. This time the father admitted the# u: N) P# A# L0 ~+ T
Topical Testosterone Exposure / Bhowmick et al 541. X: u, K& e( r; g- h
use of testosterone gel twice daily that he was apply-) k$ P0 l( o0 R' r7 K
ing over his own shoulders, chest, and back area for1 U! |! \" U9 r$ R; S, j k
a year. The father also revealed he was embarrassed
) \* x5 C/ S( A Tto disclose that he was using a testosterone gel pre-% M0 h8 A: D; E( C+ }6 D. i- b/ t
scribed by his family physician for decreased libido$ f$ Z2 Z# T. O/ G
secondary to depression.
3 E9 N4 n, l4 [% u. I' MThe child slept in the same bed with parents.: x1 [8 e5 x. R k5 M3 P
The father would hug the baby and hold him on his
2 M. O1 k" K9 {- l! A6 Y9 ichest for a considerable period of time, causing sig-
9 J% v$ {0 H* o7 ]nificant bare skin contact between baby and father.
# P2 d- T+ L( R7 d+ cThe father also admitted that after the phone call,
; s) X5 c3 s( m$ W {when he learned the testosterone level in the baby
. k( \0 K; H5 Qwas high, he then read the product information* l+ b% m- w5 {! b/ p2 @, f
packet and concluded that it was most likely the rea-
0 u) s9 H* n2 H9 I" {2 Tson for the child’s virilization. At that time, they z& e" G. Y( E) v
decided to put the baby in a separate bed, and the
4 [. m x" b9 _father was not hugging him with bare skin and had
0 R* z" e) d( y; e$ v' u0 pbeen using protective clothing. A repeat testosterone/ P& f6 J4 g$ w
test was ordered, but the family did not go to the4 L, J) P5 X% v9 B: Y- V
laboratory to obtain the test.' q3 F$ e( {5 |' w+ t1 K8 h
Discussion
* S! A7 ]7 l0 `7 }; xPrecocious puberty in boys is defined as secondary
8 r. f" k: p; C7 K1 qsexual development before 9 years of age.1,4' ]! i3 A/ @* \: E( `
Precocious puberty is termed as central (true) when
4 h6 R" m* a. cit is caused by the premature activation of hypo-. F- t7 e- k( I! H! Q" T
thalamic pituitary gonadal axis. CPP is more com-
5 N" K# p2 U& a0 D, emon in girls than in boys.1,3 Most boys with CPP. A" |) H) Z/ U0 K
may have a central nervous system lesion that is
' h$ N O3 [; V* X5 @; P% Uresponsible for the early activation of the hypothal-
( p+ f* B. U6 |' Y' hamic pituitary gonadal axis.1-3 Thus, greater empha-
% S; ~/ ~+ Z$ o+ R/ m+ Zsis has been given to neuroradiologic imaging in
1 N+ l( {% x% J* B& ?# [7 W, s8 Oboys with precocious puberty. In addition to viril-& Y0 x0 i3 z1 j
ization, the clinical hallmark of CPP is the symmet-9 a$ y8 i6 S: R" i) G
rical testicular growth secondary to stimulation by
% v' _! E. }* |gonadotropins.1,3
x- d# p3 K2 x3 MGonadotropin-independent peripheral preco-$ m! @* |- P6 a* U3 S/ C3 v
cious puberty in boys also results from inappropriate% z7 K: F, t+ E9 u. P! I. w( b& Y
androgenic stimulation from either endogenous or
3 B e, `+ I, s( |# Sexogenous sources, nonpituitary gonadotropin stim-
B* }9 u+ u- ?; p! j& d3 `) f6 Pulation, and rare activating mutations.3 Virilizing- ^2 s8 Z. i2 j0 B# k) C
congenital adrenal hyperplasia producing excessive
9 `. ~0 d9 S: G6 R& _5 _: \- Wadrenal androgens is a common cause of precocious
1 v$ t+ B( G4 kpuberty in boys.3,44 ?% z( }& u# S5 K( w5 ?
The most common form of congenital adrenal
) u: V7 e" m4 |$ o) thyperplasia is the 21-hydroxylase enzyme deficiency.& x/ S" A2 W2 {& z3 ~# j
The 11-β hydroxylase deficiency may also result in, |/ ?+ A4 _6 _$ R& P* Z7 K+ i
excessive adrenal androgen production, and rarely,
' Y/ s; S0 q5 k; R" U g& yan adrenal tumor may also cause adrenal androgen
r2 |# a, U, K; y8 r( X1 [# f4 eexcess.1,3
- }9 w5 d0 z; I5 I1 v/ v0 xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& v7 E/ n* u& b& f542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
. {' s/ J% U0 O1 R0 H3 }' u0 bA unique entity of male-limited gonadotropin-: J, D& ]* S) \, H! X
independent precocious puberty, which is also known# ^( f9 v3 R; i! n8 |
as testotoxicosis, may cause precocious puberty at a
& r& _0 P( N' D# W5 ^very young age. The physical findings in these boys
4 U5 R) M& Z8 f% N) J4 {5 iwith this disorder are full pubertal development,
/ O; P1 _5 r9 Q& pincluding bilateral testicular growth, similar to boys6 K7 Z2 |; \1 \1 r3 W1 z9 c
with CPP. The gonadotropin levels in this disorder O; p p5 R. h& L7 r
are suppressed to prepubertal levels and do not show. L. x& F A; g( A3 U+ z; d" b
pubertal response of gonadotropin after gonadotropin-4 J, g' {$ \9 Q! {" \; p' `" v$ |
releasing hormone stimulation. This is a sex-linked
& I+ z% B# L- b, U7 q- M# iautosomal dominant disorder that affects only
: N% s6 h. f% W7 ^1 ymales; therefore, other male members of the family& e( `( H; F3 M" f/ I
may have similar precocious puberty.3- F' p; H6 @) w& K; Z0 F
In our patient, physical examination was incon-
6 R L% S& E" ?% z- a1 V8 M. Asistent with true precocious puberty since his testi-
4 i5 D3 g! t8 ^: Zcles were prepubertal in size. However, testotoxicosis
8 r! i5 N2 U3 d& rwas in the differential diagnosis because his father# Y6 ^ G) H1 K. F
started puberty somewhat early, and occasionally,
$ Z) r3 C: `! n+ F( b; Gtesticular enlargement is not that evident in the! O1 x7 K8 A2 p! E2 w& J3 M
beginning of this process.1 In the absence of a neg-/ s2 Y! G: c% \ K7 } ~
ative initial history of androgen exposure, our+ s( i Z6 ]# N1 D% |+ ?! M" Z6 c1 E
biggest concern was virilizing adrenal hyperplasia,
, R* `7 i! l8 D5 Jeither 21-hydroxylase deficiency or 11-β hydroxylase/ g7 d0 [+ m, `
deficiency. Those diagnoses were excluded by find-# y; Z: a! d% E) f
ing the normal level of adrenal steroids.
: d6 G% D1 p: XThe diagnosis of exogenous androgens was strongly- ?* ~) z0 | O. z; d8 r8 D
suspected in a follow-up visit after 4 months because% U( T6 E: v3 o' p$ x
the physical examination revealed the complete disap-2 e3 l2 `2 ]% ?0 t5 _- O2 H3 u
pearance of pubic hair, normal growth velocity, and, z) f, B6 f1 w5 V2 h
decreased erections. The father admitted using a testos-
( K6 r0 W8 |' z+ D) v9 S- kterone gel, which he concealed at first visit. He was: m! L* p7 ]/ N, M& e+ h: `
using it rather frequently, twice a day. The Physicians’+ Z) J% G2 c* N b7 }
Desk Reference, or package insert of this product, gel or/ e# M7 s: Q) M9 h Z
cream, cautions about dermal testosterone transfer to& Z9 z9 z; P" F4 k; J
unprotected females through direct skin exposure.% D$ ]* V e7 z
Serum testosterone level was found to be 2 times the
& |) ~2 F) }" M' _7 E$ P* kbaseline value in those females who were exposed to
+ B; e5 E# a( X. ?5 |9 J4 u$ Leven 15 minutes of direct skin contact with their male0 _2 i5 R" J, M, a! @# q9 B
partners.6 However, when a shirt covered the applica-
: a q+ W3 t( ~/ j8 Q% ption site, this testosterone transfer was prevented.
4 C- n, g. X6 I4 R; q" POur patient’s testosterone level was 60 ng/mL,! C9 j |6 N# W, G+ N
which was clearly high. Some studies suggest that
5 d" O9 e/ o: l4 {5 J: U- Y3 I1 Cdermal conversion of testosterone to dihydrotestos-
1 \( ]. ]4 T- x# X. Z" F9 _# ?3 Nterone, which is a more potent metabolite, is more* q3 t5 _" t2 n# J. ]4 R
active in young children exposed to testosterone
- r' g* h. V: m7 Kexogenously7; however, we did not measure a dihy-1 q! H7 c' D. \6 m
drotestosterone level in our patient. In addition to3 u. v, ~. ^; ]
virilization, exposure to exogenous testosterone in
' F7 d4 K' H, ?& J) ?( k! A8 M! m: wchildren results in an increase in growth velocity and/ S3 v% ~ U7 j" s' b* l
advanced bone age, as seen in our patient.# O- n, X5 ?' i/ _- @% v7 X9 u
The long-term effect of androgen exposure during
b6 W& a: ?+ {6 _3 q; nearly childhood on pubertal development and final4 J$ u6 M5 G P1 X/ z
adult height are not fully known and always remain9 g# r5 |7 m3 q. @( Y1 x9 q
a concern. Children treated with short-term testos-
) s4 r+ m/ g9 u& v8 E$ b$ r: I( u9 ]terone injection or topical androgen may exhibit some
. a8 X) A( B' |$ ?& y4 f3 F6 X5 Gacceleration of the skeletal maturation; however, after* L1 P( R/ W% N+ O# S
cessation of treatment, the rate of bone maturation" g/ h! I$ ?# v) G V" Q
decelerates and gradually returns to normal.8,9, \' \. _8 m; C7 H
There are conflicting reports and controversy
+ c6 U6 X# M& @8 x1 ~/ ?over the effect of early androgen exposure on adult5 M I( {, `9 C, p# U- b
penile length.10,11 Some reports suggest subnormal- m+ l0 `) m- D# Z) z
adult penile length, apparently because of downreg-/ }7 g8 v D; n7 P3 k1 `! c0 p0 a, a
ulation of androgen receptor number.10,12 However,3 c) y L8 e" V8 K$ O. F. m
Sutherland et al13 did not find a correlation between
1 S2 _% s1 J# f7 [2 u- N* \* bchildhood testosterone exposure and reduced adult6 j* Q% P% N+ m+ c4 y7 E5 C
penile length in clinical studies.
+ ]3 l- U* l" S5 V5 Y J1 {Nonetheless, we do not believe our patient is6 v, B0 K; m) c' f2 B' p3 O
going to experience any of the untoward effects from) N9 x0 q7 R$ W) n. c
testosterone exposure as mentioned earlier because6 H: B( c- K% n0 W& a
the exposure was not for a prolonged period of time.
! w# x$ i! b/ RAlthough the bone age was advanced at the time of
! a* P$ h" c! @3 \diagnosis, the child had a normal growth velocity at
9 B3 A a$ ?) Xthe follow-up visit. It is hoped that his final adult
$ c6 ~ } y% X8 Uheight will not be affected.
2 I" J# I) X$ _: u3 }) m3 uAlthough rarely reported, the widespread avail-
/ J6 A F6 ~' ]+ G" H$ k- p2 Gability of androgen products in our society may7 G! [5 C* Y1 F( e
indeed cause more virilization in male or female% u+ Y5 r. n. s" t
children than one would realize. Exposure to andro-
& ~3 X- {' p* |7 Fgen products must be considered and specific ques-2 Q6 F2 B: X3 v" z' d
tioning about the use of a testosterone product or: ~# K u& u1 i3 J$ k
gel should be asked of the family members during7 \- s$ Y I* D- K) T' U
the evaluation of any children who present with vir-6 d# q4 A$ V) S4 g1 D" z- v: B
ilization or peripheral precocious puberty. The diag- I H- g: e% r8 I# K0 r) u6 q
nosis can be established by just a few tests and by
+ Q: t9 e0 `! m$ M: S$ Eappropriate history. The inability to obtain such a& |8 ~! _/ F8 m6 P7 ^
history, or failure to ask the specific questions, may
: K( S3 q, m( P* ]& P& \4 g nresult in extensive, unnecessary, and expensive
2 B& N* a% q% r, |investigation. The primary care physician should be
& N+ v9 S0 m$ j9 {, n$ y# Oaware of this fact, because most of these children% W7 E8 ]. I& V
may initially present in their practice. The Physicians’, s8 G$ Z1 F8 s, h |* u2 S: ~
Desk Reference and package insert should also put a! |* P# b& ]! a U% A
warning about the virilizing effect on a male or$ {) {8 ]/ s/ v q& | {6 z+ \, Q
female child who might come in contact with some-
3 G& l4 ~# c( U Y; ~one using any of these products.0 W7 t" O, M3 Z6 U% A7 ?
References" P8 n! p& |: N% c
1. Styne DM. The testes: disorder of sexual differentiation5 s- _5 U( w: z
and puberty in the male. In: Sperling MA, ed. Pediatric' P6 b8 K* U3 o1 |# M4 m, T
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
; C; y/ z2 I0 R9 o; ]2 G; D, g2002: 565-628.. b2 t6 H6 r6 e5 Y" C
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious2 N$ L ^( p8 A& f, h# f
puberty in children with tumours of the suprasellar pineal
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2001;90:751-756.
' p! e0 `& N/ j: l7 q* C9 U3 Q3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.7 L3 h. a4 d8 h q1 y6 O/ U
Pediatric Endocrinology. 4th ed. New York, NY: Marcel, g/ K' \* l/ y$ z* Z
Dekker Inc; 2003:211-238.1 ? V9 V3 }% }; W! c
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
0 u8 F2 R( i# c1 sdevelopment in a two-year-old boy induced by topical, {5 \" o3 `; Q5 l
exposure to testosterone. Pediatrics. 1999;104:e23.
' ?; Q0 z+ H- [ Q* r! |. Z( l% T e; i5. Greulich WW, Pyle SI, eds. Radiographic Atlas of1 ?8 K/ _' T) ~2 s( D1 @) z5 g
Skeletal Development of the Hand and Wrist. 2nd ed.0 J% h1 s* I3 \: ~
Stanford, CA: Stanford University Press; 1959.+ X2 H1 @/ {& W
6. Physicians’ Desk Reference. Androgel 1% testosterone,
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