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is a significant concern for physicians. Central3 {0 i' {1 s S, `/ K2 W
precocious puberty (CPP), which is mediated5 P5 Z( B' ^" w
through the hypothalamic pituitary gonadal axis, has
# H' \- L$ J+ J. ?$ a! a2 pa higher incidence of organic central nervous system+ O K% @4 L" U! L
lesions in boys.1,2 Virilization in boys, as manifested
. g4 B. N. ?: Zby enlargement of the penis, development of pubic* B: n2 a2 K- F$ Q0 O0 k% ?
hair, and facial acne without enlargement of testi-
+ U6 T) t- u+ _) m( h. Zcles, suggests peripheral or pseudopuberty.1-3 We
# _$ S9 ^9 m$ ^: K3 hreport a 16-month-old boy who presented with the
- n0 L/ H! I: L$ Y0 i9 p) J6 x5 Tenlargement of the phallus and pubic hair develop-
( h. ^ k5 X8 [& x5 hment without testicular enlargement, which was due
4 M* X4 C B1 b4 B G% r& y0 Mto the unintentional exposure to androgen gel used by! |+ f$ c( c f; x
the father. The family initially concealed this infor-
4 F. P* {- ] p! ymation, resulting in an extensive work-up for this1 B& N- k- i+ k( h! _
child. Given the widespread and easy availability of
. _& O$ L k* E& x: qtestosterone gel and cream, we believe this is proba-
0 E' k; B) m8 ~$ tbly more common than the rare case report in the
+ s* I! u( {! c/ G9 E/ yliterature.49 _6 [+ j+ Z5 J+ R
Patient Report5 Q# u( q6 k; j+ {5 x1 R
A 16-month-old white child was referred to the
5 z' d2 B8 w" g' Y) \! Y- G1 ?$ Cendocrine clinic by his pediatrician with the concern3 s! o* M* ^% G. N& U
of early sexual development. His mother noticed
% \1 _! l7 Y: ]. ?4 S8 clight colored pubic hair development when he was
6 l1 U4 P4 l, n% hFrom the 1Division of Pediatric Endocrinology, 2University of
% g+ a; }) ^! p( k0 }( [South Alabama Medical Center, Mobile, Alabama.1 | W( L; @4 ^: `# C, f
Address correspondence to: Samar K. Bhowmick, MD, FACE,% E4 r: @* g5 [( ?/ B
Professor of Pediatrics, University of South Alabama, College of
! G# s4 a+ J# @2 f: UMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;" S1 D5 k, u D) l2 x+ G0 q
e-mail: [email protected].1 i* v1 _1 M' ~# q' W* y7 G3 G
about 6 to 7 months old, which progressively became
" I7 h4 u) P* \' ddarker. She was also concerned about the enlarge-
# _1 u. z9 p2 T( y0 Kment of his penis and frequent erections. The child
e) \5 h7 A$ C& ?( S$ A/ Y+ v+ Z* Mwas the product of a full-term normal delivery, with6 c$ {+ f! O; Q! {! |4 a3 {+ a
a birth weight of 7 lb 14 oz, and birth length of2 }6 p& }! m% n4 @8 C$ A$ |
20 inches. He was breast-fed throughout the first year4 G4 Y& s! N3 U2 Q5 L' } t: J
of life and was still receiving breast milk along with3 z; U2 J' O* L
solid food. He had no hospitalizations or surgery,
/ [, k$ {3 q2 q7 W; rand his psychosocial and psychomotor development( o6 k8 M. c8 m, P! a" C
was age appropriate.# ]; n* R" T; Z1 v+ L
The family history was remarkable for the father,
$ C* I7 q0 w; l8 p9 }1 \who was diagnosed with hypothyroidism at age 16,
& J/ q- @: G" {% p/ T0 k% lwhich was treated with thyroxine. The father’s
% P! e; H0 J: X8 F( u5 s8 cheight was 6 feet, and he went through a somewhat
8 |! _% n& B1 _0 f7 ~ a, |early puberty and had stopped growing by age 14.' d4 ?& \. V" l1 b
The father denied taking any other medication. The& T2 v: I$ s0 W
child’s mother was in good health. Her menarche$ F( V' V5 Y7 p5 Q7 R% p0 u
was at 11 years of age, and her height was at 5 feet2 O: ], ~- b6 `( N: Z/ l3 f
5 inches. There was no other family history of pre-
# z3 K* p+ c n8 Rcocious sexual development in the first-degree rela-
: I) v: S2 |% d- ntives. There were no siblings.
9 y$ k+ B! N1 }% |2 S: b# q; wPhysical Examination
) w3 N9 ~8 X7 ^- ZThe physical examination revealed a very active,
, ~" F' \ M6 A p4 R+ e8 F( g- Uplayful, and healthy boy. The vital signs documented
& w+ k1 z4 N8 y1 B: Ma blood pressure of 85/50 mm Hg, his length was; U! q: O4 `; I. W
90 cm (>97th percentile), and his weight was 14.4 kg
, V( y5 h7 @" K* _& l- @0 R7 ]& f(also >97th percentile). The observed yearly growth
3 j& d. l: Z) @+ e$ | i' xvelocity was 30 cm (12 inches). The examination of
5 `. b" A2 Q4 c" L0 D2 Rthe neck revealed no thyroid enlargement.$ h% u. T( ^+ c
The genitourinary examination was remarkable for
# `. ?, G8 J4 `" |' ~* uenlargement of the penis, with a stretched length of7 s+ q7 |9 o9 P
8 cm and a width of 2 cm. The glans penis was very well
7 F( g o- \6 p! u1 w+ ]developed. The pubic hair was Tanner II, mostly around6 t. H. R3 Z. ~$ l
540# m/ @! C7 h% Y2 ^. a9 X8 G' Z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" Z3 Q7 ]" H/ _4 J% T* ^9 J( ^the base of the phallus and was dark and curled. The
0 x$ c7 S+ R0 n3 ^, X6 Gtesticular volume was prepubertal at 2 mL each.; `6 w- E5 z4 x
The skin was moist and smooth and somewhat
. {( `5 j; I- voily. No axillary hair was noted. There were no
t2 t0 t! ^+ ?0 s- l# x v9 F3 D, `) Yabnormal skin pigmentations or café-au-lait spots.
; g, Q4 o- o* T" iNeurologic evaluation showed deep tendon reflex 2+0 L/ j/ ^; C# a0 C2 _% C
bilateral and symmetrical. There was no suggestion$ ~' }" o# q2 G0 S* F0 M6 Q
of papilledema.) i+ Z1 d7 i- t( }1 M
Laboratory Evaluation
0 T( q8 }! l# ~The bone age was consistent with 28 months by
J. w5 p9 T5 i Yusing the standard of Greulich and Pyle at a chrono-
) E" u4 T, X8 Z4 Llogic age of 16 months (advanced).5 Chromosomal
! C5 Q4 r3 t3 p2 ]) D9 lkaryotype was 46XY. The thyroid function test) s4 g- q3 [2 n) J
showed a free T4 of 1.69 ng/dL, and thyroid stimu-6 t( o7 i' n- L* K) ^" c
lating hormone level was 1.3 µIU/mL (both normal).
0 g5 M3 Z4 b: n, K& i6 FThe concentrations of serum electrolytes, blood% @8 a) |7 i/ \! G1 w) T8 T
urea nitrogen, creatinine, and calcium all were
, C& ?, ~2 d$ Z! N9 C- J8 awithin normal range for his age. The concentration
) ?' m4 c {3 H2 q- x+ w' j3 Xof serum 17-hydroxyprogesterone was 16 ng/dL0 t4 _1 [) m& g) A( x
(normal, 3 to 90 ng/dL), androstenedione was 20/ m h: h+ o0 t1 {: m8 l
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
1 O* M ?; \2 U' @terone was 38 ng/dL (normal, 50 to 760 ng/dL),2 J! O! U" R5 l- S$ N( a0 q
desoxycorticosterone was 4.3 ng/dL (normal, 7 to) O: m2 @* V' w
49ng/dL), 11-desoxycortisol (specific compound S)
+ [6 D, t) y Nwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
8 g5 O+ B* S9 V* A6 b2 h' H' Utisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total% o$ r B6 m& i5 ]
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),1 W( E6 ~* U1 R) K
and β-human chorionic gonadotropin was less than
" T2 n. t U* U9 H& W5 mIU/mL (normal <5 mIU/mL). Serum follicular
$ N, ^. k% l* j- W/ {stimulating hormone and leuteinizing hormone" B; K5 F: d6 \4 C
concentrations were less than 0.05 mIU/mL
/ t+ A: u. G4 i2 O. ~(prepubertal).
: z+ j4 k8 h! o7 L. ^. c6 r& R! ?The parents were notified about the laboratory! S y x7 r8 D$ U4 y" x- M; m
results and were informed that all of the tests were
" _% Q2 B) u: ~( z* F$ W' Z1 hnormal except the testosterone level was high. The# X& i6 C0 f B4 i) ?
follow-up visit was arranged within a few weeks to
U; S* B: l, v4 B8 ~0 |obtain testicular and abdominal sonograms; how-6 f# T; |8 n. H1 y/ Z6 l
ever, the family did not return for 4 months.! Z& V2 H$ G- D/ p- h1 \- h" R9 {
Physical examination at this time revealed that the
8 J" }9 i8 h' X4 l4 a C0 Schild had grown 2.5 cm in 4 months and had gained& i0 {2 @" H3 f' o( m4 e
2 kg of weight. Physical examination remained
2 n+ F, r- P! n' b. P2 Vunchanged. Surprisingly, the pubic hair almost com-, k7 o6 x( {) D! d3 ^* h
pletely disappeared except for a few vellous hairs at5 ~! F9 b# ^) `, ^
the base of the phallus. Testicular volume was still 2
5 L1 @' o- k3 c* `' z& t- gmL, and the size of the penis remained unchanged.( J. A( M* L- ^6 Z( t5 [3 g F
The mother also said that the boy was no longer hav-3 ]- [% g a: h8 G5 |: D* Z
ing frequent erections.
+ j! ]0 [4 q0 P5 t% ?0 _Both parents were again questioned about use of) w4 e6 F; F d; `$ y
any ointment/creams that they may have applied to
! j' \$ X5 x$ T' S) }& dthe child’s skin. This time the father admitted the/ @/ y5 Y6 C I% T0 h
Topical Testosterone Exposure / Bhowmick et al 541
( `/ a1 g& f3 B1 N' O! E! r: e+ J2 Quse of testosterone gel twice daily that he was apply-5 Q; _8 j2 w" Q! {
ing over his own shoulders, chest, and back area for: m- k" y: J$ x4 z1 ~: q% J$ P
a year. The father also revealed he was embarrassed
. w; Y* }/ r' y5 T: _9 A1 B" gto disclose that he was using a testosterone gel pre-" {* d, L0 Y; H7 M7 @3 v& Y
scribed by his family physician for decreased libido6 a/ f0 K! l' |
secondary to depression.$ A# Y8 R; f/ z7 j! {* A5 z$ _7 O
The child slept in the same bed with parents.
9 v; n" r* c; lThe father would hug the baby and hold him on his& l$ p: D8 k5 ?& l! a
chest for a considerable period of time, causing sig-
+ W% E- u: R& Unificant bare skin contact between baby and father.4 c g1 ^) x0 G9 x& o
The father also admitted that after the phone call,: b0 x# }2 [# ~; z2 `( p) i7 S
when he learned the testosterone level in the baby' C& d8 J3 o6 p$ k
was high, he then read the product information
& E( u5 ^; I: M" L, h. U8 q& {$ G" Q4 @# M/ ^packet and concluded that it was most likely the rea-2 p0 L _8 J* k2 V0 t5 j
son for the child’s virilization. At that time, they/ W* ^5 d9 o- o# @* P5 ~( _
decided to put the baby in a separate bed, and the
# I, ]) T& K$ h7 R* s& gfather was not hugging him with bare skin and had2 \$ \+ E$ A# D1 o( `) @+ `
been using protective clothing. A repeat testosterone1 s* k( a* @% \3 B4 g
test was ordered, but the family did not go to the& O; |. X7 A8 a1 L( _
laboratory to obtain the test.
3 U1 m7 l2 q5 L. W1 R, S/ ]Discussion" i+ C) |/ w7 s' I2 h9 o5 O# ^
Precocious puberty in boys is defined as secondary
, c7 s! n4 B4 w/ Tsexual development before 9 years of age.1,4! H' |3 m+ E/ M5 i1 _" a3 R$ [/ [6 K
Precocious puberty is termed as central (true) when
, R, c+ L: L7 j4 ]- Oit is caused by the premature activation of hypo-" @. t/ e3 [; B
thalamic pituitary gonadal axis. CPP is more com-
! t+ S) Y( S* [# q% Z5 Xmon in girls than in boys.1,3 Most boys with CPP
9 Q/ m6 G7 V* f" K: r) Kmay have a central nervous system lesion that is0 a, o" C2 J( C+ [: R: L4 [& Z
responsible for the early activation of the hypothal-& h0 U/ _8 T6 N' v/ @8 @$ {
amic pituitary gonadal axis.1-3 Thus, greater empha-
2 y% {9 C& s: H: _+ o9 \; ?sis has been given to neuroradiologic imaging in% E: {; z2 ^2 ?; |& h* ^; J
boys with precocious puberty. In addition to viril-% b) I- C+ ?$ @# E# S
ization, the clinical hallmark of CPP is the symmet-9 K+ E4 |0 K. N2 F) c/ l& Z, x
rical testicular growth secondary to stimulation by
- R) w5 ^+ N6 a- bgonadotropins.1,3
$ F, S `# H# a9 L; ]3 {( n) BGonadotropin-independent peripheral preco-
( D( ?( _: } o- ?* [- bcious puberty in boys also results from inappropriate) {: H& Y# A+ Z( }
androgenic stimulation from either endogenous or8 I$ s" X" w2 d% I% k
exogenous sources, nonpituitary gonadotropin stim-
5 ~, \# s; B$ x8 d( R8 ^6 Mulation, and rare activating mutations.3 Virilizing
( h% k7 {1 w- F: P4 p( d4 m0 z zcongenital adrenal hyperplasia producing excessive& p; t2 C, H. q4 w9 {
adrenal androgens is a common cause of precocious# r/ {! l5 Z9 _5 Q
puberty in boys.3,4
6 \ Q+ w t8 l; M0 Z7 TThe most common form of congenital adrenal
# a4 K P8 D( o' u6 x: B. ihyperplasia is the 21-hydroxylase enzyme deficiency.' F P& k8 t0 I. A+ P
The 11-β hydroxylase deficiency may also result in8 S3 p+ m2 L' [! S# q
excessive adrenal androgen production, and rarely,
7 l5 M$ V" T$ I9 c& xan adrenal tumor may also cause adrenal androgen% o) ?0 \3 I+ d, e; s
excess.1,30 [- x7 K# I7 Y: |% S8 A
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from5 @# O; \1 T2 X. N
542 Clinical Pediatrics / Vol. 46, No. 6, July 20079 z/ K/ J. T' ^& r+ ]2 ?
A unique entity of male-limited gonadotropin-5 ?, s( c$ k2 n0 |8 d9 ]/ K( u
independent precocious puberty, which is also known
9 s# [; Z+ j3 r8 I. C# bas testotoxicosis, may cause precocious puberty at a8 E+ f/ c( \( d5 h. g( i- w
very young age. The physical findings in these boys* K+ n1 j C; F' m8 }; \% B* E% G2 x
with this disorder are full pubertal development,
* ]( \# ^# U" K; b! ]* v \; ^including bilateral testicular growth, similar to boys& k; Z. m0 }+ x1 R$ v* S7 ?
with CPP. The gonadotropin levels in this disorder$ u4 V) i5 x* N& g4 Z; S
are suppressed to prepubertal levels and do not show
1 y- B# {: E6 i& H6 Upubertal response of gonadotropin after gonadotropin-; C; d8 }# s6 L* M) g- U
releasing hormone stimulation. This is a sex-linked* [* ^3 s1 v* X& u3 U
autosomal dominant disorder that affects only7 V# r1 P' Y2 O- p- h' t# A! A
males; therefore, other male members of the family
% \8 T) U& F) ~( Lmay have similar precocious puberty.3$ Y# g/ e8 }) i7 T! x1 K
In our patient, physical examination was incon-8 q) @! F" L* O
sistent with true precocious puberty since his testi-1 Z6 e U) j3 R$ b! V
cles were prepubertal in size. However, testotoxicosis
! z0 y) t2 [ |: e$ u$ Q( Lwas in the differential diagnosis because his father) Y% N# x8 R! t8 b& \) g
started puberty somewhat early, and occasionally,2 l0 D7 w/ Y3 h2 {: R0 p9 W
testicular enlargement is not that evident in the5 S8 d u. ^; f! {
beginning of this process.1 In the absence of a neg-5 j4 f+ [) e! K# Q) X) r) |& @" Q! w
ative initial history of androgen exposure, our
, M0 l/ H/ \. g" X- H! Zbiggest concern was virilizing adrenal hyperplasia,. D: T- |. y( i: U/ z# H' D& z& I
either 21-hydroxylase deficiency or 11-β hydroxylase
. v- E ^( l' adeficiency. Those diagnoses were excluded by find-
, S" \& r6 C) S0 m+ |% q6 v0 Ding the normal level of adrenal steroids.
$ i) }# z! k4 |9 J' HThe diagnosis of exogenous androgens was strongly
: c2 L! u2 I9 m; M% n8 O4 l( N6 Msuspected in a follow-up visit after 4 months because4 j4 a' p' R, a4 D" y1 ^/ H6 o
the physical examination revealed the complete disap-
: m$ ?7 ?) t& f0 u3 ]' e& Xpearance of pubic hair, normal growth velocity, and4 f. k8 h' X' B) d
decreased erections. The father admitted using a testos-
" t. }6 _9 C$ ^8 z0 oterone gel, which he concealed at first visit. He was
/ y& `; Y" R. Y: Ausing it rather frequently, twice a day. The Physicians’
$ f5 l6 b1 C5 J: i% q8 D+ {7 cDesk Reference, or package insert of this product, gel or
8 V9 T* U& L( F8 c9 R% m6 {cream, cautions about dermal testosterone transfer to
- } T( n8 _/ t* f+ d: k4 eunprotected females through direct skin exposure.& e( |7 H0 K& V# ~/ Y
Serum testosterone level was found to be 2 times the$ P/ E9 G6 h6 i- J; U
baseline value in those females who were exposed to
4 X# g7 [* B# Z5 Jeven 15 minutes of direct skin contact with their male
0 u! ~( F! N$ r. Mpartners.6 However, when a shirt covered the applica-9 I# D/ H& N7 M& ~6 ^ V" b
tion site, this testosterone transfer was prevented.
* O& g& l' E6 F, W7 w3 LOur patient’s testosterone level was 60 ng/mL," V$ e) A! G6 q, K: E9 K
which was clearly high. Some studies suggest that
) t, b& ~, |- B" {& I# Qdermal conversion of testosterone to dihydrotestos-
; g! G0 e5 v& t2 w. oterone, which is a more potent metabolite, is more
* p9 a- l0 b* d% ractive in young children exposed to testosterone8 l" U1 Q" u" n+ d/ d& j) D) G$ Q/ g. v
exogenously7; however, we did not measure a dihy-6 L1 x% P9 R9 y+ A8 b
drotestosterone level in our patient. In addition to
4 C* G8 V7 _) A( m, @& Tvirilization, exposure to exogenous testosterone in J% h& I7 |- k% ~
children results in an increase in growth velocity and S+ O0 P+ T! M W) U
advanced bone age, as seen in our patient. `* s$ h- q5 w' p" J
The long-term effect of androgen exposure during
/ `# d% ?% N7 W) ?3 M+ h3 Qearly childhood on pubertal development and final
( Q% Z% E, z8 z3 h7 `: Oadult height are not fully known and always remain
7 {7 o+ d9 z; x& [a concern. Children treated with short-term testos-
4 ?# r5 \: f0 _. s+ m0 Gterone injection or topical androgen may exhibit some6 X$ |) {, L% \+ N- S/ J+ }- f. G. K
acceleration of the skeletal maturation; however, after
2 t' d; v' x$ ^; R- Acessation of treatment, the rate of bone maturation; Q- }' W1 E3 k
decelerates and gradually returns to normal.8,9
% u `+ s, `0 t$ KThere are conflicting reports and controversy
9 a2 p2 c2 K9 {9 ]over the effect of early androgen exposure on adult' _3 a" w1 s, C' \" ~4 o+ |
penile length.10,11 Some reports suggest subnormal
9 c3 ^7 q1 S0 sadult penile length, apparently because of downreg-
& T- E$ w% i. v7 W- j$ Z7 Y; n# mulation of androgen receptor number.10,12 However,5 I. Y; f( m# w( g
Sutherland et al13 did not find a correlation between8 r7 @: n' Z4 R, i/ L2 G7 ]: k
childhood testosterone exposure and reduced adult5 F' i2 M# A+ R9 h, k6 p0 r, f- M& M
penile length in clinical studies.
- W) d, b+ Y. W/ RNonetheless, we do not believe our patient is
6 C5 \4 a) Y4 E; I' o& v' agoing to experience any of the untoward effects from
" Z( H4 p& {" x) U* P+ s9 Wtestosterone exposure as mentioned earlier because
4 N- H8 D/ g8 c% dthe exposure was not for a prolonged period of time.
$ E5 G9 {. y3 P# ]" c9 [7 z# z/ gAlthough the bone age was advanced at the time of h+ M- }. y% q4 @- h/ i
diagnosis, the child had a normal growth velocity at$ y y9 `/ S! I* }% R
the follow-up visit. It is hoped that his final adult
. I- g/ J. V/ v5 {/ Vheight will not be affected.
8 X: l/ I, Z7 p: gAlthough rarely reported, the widespread avail-: ?& u( _; u1 c E! M1 H+ m
ability of androgen products in our society may$ h& U5 ? q1 _) W
indeed cause more virilization in male or female6 l$ z# G* n2 L- `# O" l
children than one would realize. Exposure to andro-
7 c! [# }3 p. d9 h& f2 ogen products must be considered and specific ques-
9 e3 w! W) p/ J B8 {& H( gtioning about the use of a testosterone product or
" _( f8 i* G* M. e( R" zgel should be asked of the family members during/ U$ H; U: }. Q
the evaluation of any children who present with vir-7 ^' p9 x7 X+ F q. Y) h. z! ^, O7 Y
ilization or peripheral precocious puberty. The diag-
2 `0 H% d) W( \' m, {( S/ w3 Bnosis can be established by just a few tests and by
# L3 A, N) E; }. T6 H0 m3 z% L% gappropriate history. The inability to obtain such a/ w! D: x% z# V7 q9 q
history, or failure to ask the specific questions, may8 W L; Z: n5 w) u( M# G M4 R5 m( _: s
result in extensive, unnecessary, and expensive
4 r) j1 ?+ f+ |% N8 a9 ginvestigation. The primary care physician should be
9 z, X) Y, Z% z1 f4 @aware of this fact, because most of these children
: }5 i" x% q) [7 |5 Qmay initially present in their practice. The Physicians’ m* D! F' t9 S- O( }3 Z& i
Desk Reference and package insert should also put a) T8 l2 H- |& q1 x4 b: \* `
warning about the virilizing effect on a male or
* l' E' M; H! e* t! d) S% afemale child who might come in contact with some-
3 q+ g" Z) I$ gone using any of these products.* l; [* ~. k, P% e, ~8 X
References7 |! d! ^4 _' V6 L
1. Styne DM. The testes: disorder of sexual differentiation
O! |% o; E4 l5 O' r: a; gand puberty in the male. In: Sperling MA, ed. Pediatric# u! F$ O, J0 N. E U
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
: u+ q0 R. @$ B5 ~2002: 565-628.* s) V7 a2 j8 v
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
3 A* w& d9 x! B: S, \, x& M6 Mpuberty in children with tumours of the suprasellar pineal
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2001;90:751-756.0 ]. Y9 F. R; f# G' T$ N
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
/ `8 O- E8 G5 d. b ^Pediatric Endocrinology. 4th ed. New York, NY: Marcel
- O/ Y% r& {3 I3 Y1 fDekker Inc; 2003:211-238.
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development in a two-year-old boy induced by topical
+ \% `$ j4 [* K8 t8 L7 vexposure to testosterone. Pediatrics. 1999;104:e23.
1 w8 X/ R- s" R6 L5. Greulich WW, Pyle SI, eds. Radiographic Atlas of3 l4 a0 a! a# K, V: W* S4 _- P- L) F
Skeletal Development of the Hand and Wrist. 2nd ed.: y& N1 m& L2 w# n$ M
Stanford, CA: Stanford University Press; 1959.
+ b2 Y( b% x% M0 Z! N1 L6. Physicians’ Desk Reference. Androgel 1% testosterone,
1 f$ c- }! H! P$ Z5 O% Y' t& _" K. S" MUnimed Pharmaceutical Inc. Montvale, NJ: Medical
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