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is a significant concern for physicians. Central, ?0 i' O( k R$ w5 O/ `9 M. t
precocious puberty (CPP), which is mediated5 ]0 K0 R5 \% |- H
through the hypothalamic pituitary gonadal axis, has; U6 m' S$ \% D) Q( b& ?
a higher incidence of organic central nervous system
8 r$ W" k1 r9 D. a/ R. I2 {3 ^+ _lesions in boys.1,2 Virilization in boys, as manifested# u: d% C& a; W& _8 V- ~
by enlargement of the penis, development of pubic
# K/ Y& U$ E6 \, t" qhair, and facial acne without enlargement of testi-+ A4 N6 T. r9 f1 } A/ R
cles, suggests peripheral or pseudopuberty.1-3 We' }# M" |) j% o; Q. e
report a 16-month-old boy who presented with the% x+ Q& k' K9 M8 X# K. @7 z
enlargement of the phallus and pubic hair develop-
! i. q6 J. L. b5 m$ m5 \ Oment without testicular enlargement, which was due
! @: \2 C+ T) h5 s+ \to the unintentional exposure to androgen gel used by; k# X7 s: U8 \9 U+ f; x' z
the father. The family initially concealed this infor-
- X8 u3 ~5 I5 P$ Imation, resulting in an extensive work-up for this( e1 J& J& r1 H' }! O9 R
child. Given the widespread and easy availability of
' [. S7 H3 @6 f; \% Htestosterone gel and cream, we believe this is proba-' ^# g9 z7 s& e, r
bly more common than the rare case report in the+ J; O; K$ ? b2 I" W
literature.4
6 X. I$ R" E3 e! PPatient Report3 X' s2 @: S7 B# d$ S3 o: c
A 16-month-old white child was referred to the( ?+ c! F* D; y
endocrine clinic by his pediatrician with the concern( e* O0 z7 I, C1 m# U
of early sexual development. His mother noticed
t* n" q1 ~9 ~* i3 alight colored pubic hair development when he was/ O& V, |" J$ o! Q! \$ S2 X0 f
From the 1Division of Pediatric Endocrinology, 2University of$ L( Y! S& }( \; B/ y: k
South Alabama Medical Center, Mobile, Alabama.
1 s" F' E R& }Address correspondence to: Samar K. Bhowmick, MD, FACE,
) O, x9 k6 p; F! b% ]- m8 ZProfessor of Pediatrics, University of South Alabama, College of
. }: E9 o7 w4 V+ a: kMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
2 F e3 ^# O# p' d! ue-mail: [email protected].2 l2 f! A* ~" J6 d% `6 Q3 q
about 6 to 7 months old, which progressively became
' T% ]# r# ^, \darker. She was also concerned about the enlarge-. w) F2 {6 _8 i# y T
ment of his penis and frequent erections. The child
9 H- K/ w- i6 s' Iwas the product of a full-term normal delivery, with
4 v; R5 ]5 k7 g4 m; ^; ?a birth weight of 7 lb 14 oz, and birth length of% m t8 s$ J) _& W
20 inches. He was breast-fed throughout the first year5 q+ V$ P% ]) H* v* m
of life and was still receiving breast milk along with9 O0 x% C7 H# Y1 f# K# c
solid food. He had no hospitalizations or surgery,
, [7 ?# M) z, n) F" dand his psychosocial and psychomotor development
5 ~# M$ @0 o& `! ^was age appropriate.! U6 M# m5 d0 z7 F" j B
The family history was remarkable for the father,; J0 d# Y% v- |3 q$ M7 Q, ?
who was diagnosed with hypothyroidism at age 16,9 F. V. A7 |2 Y& V# x1 m) L, K3 N
which was treated with thyroxine. The father’s# C( E: I1 W: T& ]: B E
height was 6 feet, and he went through a somewhat
: B, t4 `! A& p* Oearly puberty and had stopped growing by age 14.
: t% N Z$ @2 CThe father denied taking any other medication. The
~3 p6 Y/ B+ j1 E Zchild’s mother was in good health. Her menarche
; C1 E* e( R$ O4 H+ ~6 rwas at 11 years of age, and her height was at 5 feet# D$ Y2 r. z' s$ O% j
5 inches. There was no other family history of pre-
, s6 [2 R6 J- H- p6 i. H- v2 Vcocious sexual development in the first-degree rela-
9 L2 u# u0 I* a$ n7 E% @/ ?/ R$ htives. There were no siblings.
* t& I! a( t/ k' p! x6 [* u7 vPhysical Examination0 ]+ B0 p/ }+ x5 |2 p
The physical examination revealed a very active,
/ T1 F. V' ?2 J9 w: Pplayful, and healthy boy. The vital signs documented* D! R3 s+ W- }2 ^) D }- ~! E# M6 K( Q
a blood pressure of 85/50 mm Hg, his length was$ r N; n4 x: S6 l
90 cm (>97th percentile), and his weight was 14.4 kg4 G; k" k4 B6 J# s' Y
(also >97th percentile). The observed yearly growth
l0 j. r* e- W cvelocity was 30 cm (12 inches). The examination of
: r5 |5 C+ W$ E1 u* P$ i7 I( ~the neck revealed no thyroid enlargement.
9 h! v% a8 p: A+ b2 Y; }0 x( O5 bThe genitourinary examination was remarkable for' E4 Z% \- J$ K& F3 Q
enlargement of the penis, with a stretched length of
. K# V, a% I8 ?- m8 cm and a width of 2 cm. The glans penis was very well
+ q* g' _: d5 I3 K0 zdeveloped. The pubic hair was Tanner II, mostly around
& H# e" b1 `: C5 j: D6 ^( H2 |* W3 [540
" M) S( c5 U- `) e$ h/ e8 jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
9 a3 ~" k' c7 q* w! `1 ]9 Nthe base of the phallus and was dark and curled. The
9 P% I6 [4 d8 G" e& p" ?testicular volume was prepubertal at 2 mL each.* k! G4 ]+ S* U. O
The skin was moist and smooth and somewhat; Q9 d( s% ]$ |5 o! E" T& R
oily. No axillary hair was noted. There were no
8 n( r8 R+ {; D9 _ w. ?3 Eabnormal skin pigmentations or café-au-lait spots.
) @# r! g5 G0 z" H8 f! _Neurologic evaluation showed deep tendon reflex 2+
$ b; Q# F! X3 T, _# ^1 l$ E9 V7 gbilateral and symmetrical. There was no suggestion; D+ J4 A- D6 y7 x& J# l# c
of papilledema.. S- C6 g0 v5 B
Laboratory Evaluation
$ A4 K6 ~1 e; \% X; \0 KThe bone age was consistent with 28 months by
- u7 c8 c1 j$ p/ S j+ K( Musing the standard of Greulich and Pyle at a chrono-
8 k: `, U7 t0 S7 I: \- plogic age of 16 months (advanced).5 Chromosomal
! t T$ t4 {. m" Q% W/ I2 k8 hkaryotype was 46XY. The thyroid function test
# L# P' N) E! j% |. Zshowed a free T4 of 1.69 ng/dL, and thyroid stimu-, o* `2 k0 l. J7 Q* z, I
lating hormone level was 1.3 µIU/mL (both normal).' w4 F9 g1 {! B
The concentrations of serum electrolytes, blood
6 X$ e, M2 F' ?7 l+ }; [urea nitrogen, creatinine, and calcium all were
, ^3 @: B+ R5 h1 r+ o6 S. f: hwithin normal range for his age. The concentration
4 p5 B, W( a! T: ~7 H; a! r3 E$ pof serum 17-hydroxyprogesterone was 16 ng/dL
8 x- d6 C ?5 R) T1 J; c7 @" f! a! h(normal, 3 to 90 ng/dL), androstenedione was 207 K. a) R* c* h% O
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
# k& V" t1 V" S7 G0 U" p+ kterone was 38 ng/dL (normal, 50 to 760 ng/dL),
- X5 ^3 G2 ^& r M: Gdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
' s3 _% z& o, E0 I C49ng/dL), 11-desoxycortisol (specific compound S)2 F% Y- L4 @' k) l) Y2 Q# g
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-1 G1 [! a+ l- B: I+ c
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
; I: Y4 G$ U K) v9 f) b- k, `2 d9 n7 N! ctestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
6 V" y, ?1 }7 S4 U. Rand β-human chorionic gonadotropin was less than9 f7 [* u0 L9 U3 F/ U4 @* [5 \
5 mIU/mL (normal <5 mIU/mL). Serum follicular6 f* L! ^) G1 ^/ o2 b! \
stimulating hormone and leuteinizing hormone4 ]6 ?$ ?' |+ |0 A& Y& M
concentrations were less than 0.05 mIU/mL/ _, q6 o$ O) W, _! g3 \
(prepubertal).
1 M- u4 L- z) X& c# \ G* s: G, EThe parents were notified about the laboratory, z4 ? y& A# ]
results and were informed that all of the tests were/ U$ ^2 w. K9 m% ^1 V3 \
normal except the testosterone level was high. The# N% `! I9 ?- ?! S! p
follow-up visit was arranged within a few weeks to
4 s7 w4 e8 l" g# M$ Robtain testicular and abdominal sonograms; how-' H6 j" u# w, E/ C: r& J% a% x3 n
ever, the family did not return for 4 months.
( e7 U# G- d/ }$ O f7 w! z* dPhysical examination at this time revealed that the o! o& m5 s4 k$ H: k/ r
child had grown 2.5 cm in 4 months and had gained0 X2 I5 f% l! C# j9 j N9 O
2 kg of weight. Physical examination remained
7 |* h1 N2 A. W+ i2 nunchanged. Surprisingly, the pubic hair almost com-2 V( x$ n' u5 {+ ?% m
pletely disappeared except for a few vellous hairs at, B, E7 ?9 A1 L8 r
the base of the phallus. Testicular volume was still 2
3 b! E2 [3 B# a+ r/ YmL, and the size of the penis remained unchanged.8 b* \7 q- T' h7 V2 `
The mother also said that the boy was no longer hav-
. o- E$ x" i! S) \9 O1 ?1 Z5 Xing frequent erections.
7 r8 r8 E" |/ k8 \Both parents were again questioned about use of) {+ x% s1 ]% i
any ointment/creams that they may have applied to, {7 t1 C% m# _# n# K( `/ `/ N
the child’s skin. This time the father admitted the- E6 H' S2 f- _& A0 m+ F
Topical Testosterone Exposure / Bhowmick et al 541) ~+ e0 ~2 Q( t: i+ B7 P- [
use of testosterone gel twice daily that he was apply-6 B6 J+ ?5 \2 R, k4 i: Y: \, L
ing over his own shoulders, chest, and back area for, r- ]+ i/ W! w% k. e
a year. The father also revealed he was embarrassed
8 {4 [+ p" J2 G! S# X3 dto disclose that he was using a testosterone gel pre-
Z7 `6 {: C$ I" \scribed by his family physician for decreased libido+ H6 U& G) W- ^9 G1 E$ f
secondary to depression.( X% K2 M1 G1 E6 a8 \
The child slept in the same bed with parents.
6 J8 O4 U! w& ~; Z! sThe father would hug the baby and hold him on his; d" X9 @6 v5 U7 ~9 A
chest for a considerable period of time, causing sig-8 l9 l( N& q1 K$ w( q4 w, j- D: l# R
nificant bare skin contact between baby and father.3 u8 B2 m' x r% B" O) e; F
The father also admitted that after the phone call,
9 s7 G; w# E* X# M. ]when he learned the testosterone level in the baby
1 \+ o8 C3 m& cwas high, he then read the product information' I# k4 }1 [9 V. M
packet and concluded that it was most likely the rea-" r, U2 U$ B6 k: G5 v) ]
son for the child’s virilization. At that time, they1 P( }/ K& M: H' J7 `9 {
decided to put the baby in a separate bed, and the
4 ?& G3 t& T& S" _father was not hugging him with bare skin and had! u% M8 U, l% O
been using protective clothing. A repeat testosterone3 v0 k! b5 i0 y* v! W7 n, j
test was ordered, but the family did not go to the
# R% q x4 V3 Q. \, Xlaboratory to obtain the test.2 U6 C6 a$ Q0 Q; q% j+ ~( i
Discussion
3 N; a; n8 l; e/ C- SPrecocious puberty in boys is defined as secondary# I8 F$ u/ [! x1 P# {2 U% \ z$ ?
sexual development before 9 years of age.1,4! ~6 x$ X0 l! {1 V
Precocious puberty is termed as central (true) when
# d0 w& `3 ^* G- s7 ?, @# y5 Hit is caused by the premature activation of hypo-
* T# g P3 {, p2 b0 }- Sthalamic pituitary gonadal axis. CPP is more com-
4 G% {6 ~5 j# A& x5 P/ ? O5 Tmon in girls than in boys.1,3 Most boys with CPP
+ [) U5 e& v) Dmay have a central nervous system lesion that is
. M! C& [4 x, a, H: m7 w6 fresponsible for the early activation of the hypothal-5 U g* S3 B! ?9 E1 v
amic pituitary gonadal axis.1-3 Thus, greater empha-
I+ E% U' ]& Q9 esis has been given to neuroradiologic imaging in
( l/ J2 o! } B* y* dboys with precocious puberty. In addition to viril-
" w) |# M* f$ ~# b1 @! }0 G9 n: Tization, the clinical hallmark of CPP is the symmet-& G% O5 B+ |$ V$ G/ [. I
rical testicular growth secondary to stimulation by7 @% j) S8 i) q- t$ n
gonadotropins.1,3' {% g6 O3 a+ S( a) x4 C
Gonadotropin-independent peripheral preco-
5 o4 `! ~# W. Q, d# s8 Y2 Q3 Rcious puberty in boys also results from inappropriate
0 `3 }2 |0 M k# z6 xandrogenic stimulation from either endogenous or
$ }4 D q3 [% h5 m0 G" z$ i2 c Lexogenous sources, nonpituitary gonadotropin stim-# @' d$ i0 \7 p v
ulation, and rare activating mutations.3 Virilizing
; M0 j) l- P2 J/ n" X7 L* x7 Acongenital adrenal hyperplasia producing excessive
' Y( J; ~8 o$ R3 I6 x) b; {1 R4 radrenal androgens is a common cause of precocious9 ~2 p4 H/ }6 S" \
puberty in boys.3,4 x: l1 f2 S& J: A" c, D5 ]8 v
The most common form of congenital adrenal
4 I) `- e5 k) @. M S: z) Dhyperplasia is the 21-hydroxylase enzyme deficiency.1 i" J3 q& }/ g4 I+ Z$ u1 Z
The 11-β hydroxylase deficiency may also result in( M `! t% [$ l( K: k# D# W: k& H
excessive adrenal androgen production, and rarely,
! r f* R t) b0 T+ |& G0 U3 s6 xan adrenal tumor may also cause adrenal androgen
* U& g+ L) Q3 E0 r( D) i+ fexcess.1,3
3 l+ u, ]+ H1 a: E) c$ n3 A1 k/ iat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from: u ^1 X. d1 k {/ B9 Q! }
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
9 k. W" M0 z7 fA unique entity of male-limited gonadotropin-
. k* w" |3 O7 l K( Qindependent precocious puberty, which is also known$ M3 n. R( c- Q- P# o& @& B
as testotoxicosis, may cause precocious puberty at a
, I" C& C* s) [/ {! C1 dvery young age. The physical findings in these boys
) V6 r( j8 p( ]" O% qwith this disorder are full pubertal development,5 [* u5 F1 V/ _
including bilateral testicular growth, similar to boys
0 l# Q ~ T+ {( S( N! x3 ^# _% Ewith CPP. The gonadotropin levels in this disorder8 c+ S- g1 L6 d( O
are suppressed to prepubertal levels and do not show
! h) q% h9 C: |5 Dpubertal response of gonadotropin after gonadotropin-
+ ~$ `6 F6 N9 ~/ o2 ~' i" Q3 _releasing hormone stimulation. This is a sex-linked/ R, P0 q* S' F8 s# ~! j
autosomal dominant disorder that affects only t4 X* `1 _5 n
males; therefore, other male members of the family3 _) \: T/ p6 w+ \' z
may have similar precocious puberty.3/ R9 T+ q) I& D9 R
In our patient, physical examination was incon-9 T! e( I+ _2 ?# r+ K4 D7 r; K2 x
sistent with true precocious puberty since his testi-6 f3 R- c. H7 M' k6 ^" O
cles were prepubertal in size. However, testotoxicosis' z/ h3 W' j+ R# b% _$ v% v- x
was in the differential diagnosis because his father
( L9 _ I' J8 g* `' r% N0 \1 Qstarted puberty somewhat early, and occasionally,
$ i q1 [) f9 l) E6 htesticular enlargement is not that evident in the
- J. T8 u. a" k: Ybeginning of this process.1 In the absence of a neg-8 ?. w) D* }: V+ b2 Z
ative initial history of androgen exposure, our
* k+ k- z& t* i& S/ b/ fbiggest concern was virilizing adrenal hyperplasia,
$ H) G& G) \+ weither 21-hydroxylase deficiency or 11-β hydroxylase; v4 [: ]) L+ |* l# W8 A% w
deficiency. Those diagnoses were excluded by find-
; `4 _: ^ k+ [2 ^) k/ F) P& _ing the normal level of adrenal steroids.& t% s: l9 o$ v6 M
The diagnosis of exogenous androgens was strongly
/ A9 ]8 b+ d# P8 C7 }suspected in a follow-up visit after 4 months because J# I0 A8 Y0 P J4 e. E
the physical examination revealed the complete disap-8 p& H6 w4 b7 r' d2 ?3 c. O
pearance of pubic hair, normal growth velocity, and* k6 f9 s* v& D5 [0 N# n' U
decreased erections. The father admitted using a testos-: d6 M( A/ p- H0 }8 U4 |
terone gel, which he concealed at first visit. He was, M* V" m/ M) s1 j* B( U$ @) Q! o
using it rather frequently, twice a day. The Physicians’9 G1 j) s* T5 ~! g
Desk Reference, or package insert of this product, gel or& ~" Y; B; g. i. e5 k
cream, cautions about dermal testosterone transfer to
9 X& u" g6 k5 _9 `: U( ^4 |unprotected females through direct skin exposure.
' k+ o1 K3 I) ~' f- [Serum testosterone level was found to be 2 times the
5 c. g3 {! L$ G) Z, d( P- t. vbaseline value in those females who were exposed to+ h# h3 S4 D; N3 V
even 15 minutes of direct skin contact with their male
1 ^9 _: z! h6 U: h! T$ D/ ?3 Qpartners.6 However, when a shirt covered the applica-5 @: ?8 r1 J8 E
tion site, this testosterone transfer was prevented." @/ f, @ j! Y c! ?; D
Our patient’s testosterone level was 60 ng/mL,
6 K/ D. [: H) Hwhich was clearly high. Some studies suggest that
G/ v) _# J7 W# b3 w( j( Ydermal conversion of testosterone to dihydrotestos-# p0 @6 t6 c4 ?
terone, which is a more potent metabolite, is more( K# N B$ C, X% d A
active in young children exposed to testosterone. A0 N- g/ n9 F8 v3 l
exogenously7; however, we did not measure a dihy-
' N0 ^5 ?; |" f1 d8 hdrotestosterone level in our patient. In addition to
( S0 G7 v4 s. ^5 rvirilization, exposure to exogenous testosterone in
/ g# J0 ~, v0 ?% R5 l! gchildren results in an increase in growth velocity and; E5 M. t0 R- P
advanced bone age, as seen in our patient.
$ ^% e" \! D/ q! z: @7 t& \9 e' oThe long-term effect of androgen exposure during) h/ B; Z- O, U2 {# B8 [9 f
early childhood on pubertal development and final% H) c& ?! K) ?7 J( G7 p
adult height are not fully known and always remain
- x7 B' v7 u, z/ [a concern. Children treated with short-term testos-
0 r# C6 Y z. I( f5 C) s, Fterone injection or topical androgen may exhibit some( R& o6 D7 i) `* k: I& T# L# k
acceleration of the skeletal maturation; however, after: Z' L, o% A" u# q/ t) P. |9 O
cessation of treatment, the rate of bone maturation
0 R/ H( \. P% f1 D" B$ N3 K- \+ Sdecelerates and gradually returns to normal.8,9( U- Z u% c8 `1 C; v8 ]8 S
There are conflicting reports and controversy
1 |: m( J) q. sover the effect of early androgen exposure on adult
+ L4 Q8 E4 _) }2 [penile length.10,11 Some reports suggest subnormal
+ w5 E3 `" l3 oadult penile length, apparently because of downreg-7 H9 T2 f6 O2 Z+ N. }- Y' C9 r
ulation of androgen receptor number.10,12 However,7 K4 [( m: D3 n0 t* x
Sutherland et al13 did not find a correlation between
1 \ ]- u" k4 t5 _5 ^' \* u$ |childhood testosterone exposure and reduced adult. s/ {+ i3 p( m1 Q" k
penile length in clinical studies.' F4 V; k& e4 O! |' {8 z
Nonetheless, we do not believe our patient is
8 E+ Q& W+ C/ @& G! K; bgoing to experience any of the untoward effects from
0 X3 _; w( K/ }: Q u/ ytestosterone exposure as mentioned earlier because
, @, _& J, [0 e' V" }the exposure was not for a prolonged period of time.
. ^: T! R6 \) V8 B+ k7 r3 O* [Although the bone age was advanced at the time of7 `0 [" Y5 O; r* M6 r, c
diagnosis, the child had a normal growth velocity at9 ]) S9 I9 c4 B5 u
the follow-up visit. It is hoped that his final adult
! k2 i! e1 X/ theight will not be affected.
) v4 T- \3 T' O k6 |% v! gAlthough rarely reported, the widespread avail-
" Z( w; s3 L' l# v% g/ ], K3 Cability of androgen products in our society may# P2 }# ~/ Q! x
indeed cause more virilization in male or female
& y& z! B* ^ M! echildren than one would realize. Exposure to andro-3 }: @5 }- E. A: n: I7 l( `9 }
gen products must be considered and specific ques-3 \! A8 f- \' z: C% J4 Q" Y8 v2 D
tioning about the use of a testosterone product or8 \6 s6 _' S6 h; q1 b1 t# n8 D/ R
gel should be asked of the family members during. @% k# B* Z2 |/ L5 A) e S
the evaluation of any children who present with vir-+ Y/ m1 k5 e/ p% ]/ K" `
ilization or peripheral precocious puberty. The diag-5 q" j: {# `- F; [) g
nosis can be established by just a few tests and by
6 `1 T5 Q+ A$ Gappropriate history. The inability to obtain such a8 c2 K$ {" v: G; X' K
history, or failure to ask the specific questions, may7 j. T! \- e* n6 N9 L- N
result in extensive, unnecessary, and expensive- }) @6 u B8 R( [& h- N
investigation. The primary care physician should be
2 r: N4 u- ^7 R: e& vaware of this fact, because most of these children
& w9 c+ ]. S% T0 q8 H4 A# J# ]4 Omay initially present in their practice. The Physicians’ X* c& }7 i; e" R# i
Desk Reference and package insert should also put a
5 H$ |( L1 G: s' h p3 x9 @warning about the virilizing effect on a male or
( ]! h3 ], A4 G, l5 H9 \8 N# N+ afemale child who might come in contact with some-
3 ~) O3 }. Y' i0 none using any of these products.5 ?. M/ }* v$ F' a" s& V
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
" L# @3 V7 c2 c. @+ g; `) e" ?2002: 565-628.
9 c7 U: ?! \* i6 U2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious' f' W- n. {/ r6 Q0 P
puberty in children with tumours of the suprasellar pineal
9 X- U* F" }% q0 R9 eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! N7 [; E- l( t$ { e* K& M+ N. m
Topical Testosterone Exposure / Bhowmick et al 543$ K6 y& z$ `+ ?# E
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# c; u" q2 J. G) y3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.7 ?9 A8 G2 W+ E: [; ~
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
1 r* }9 A- X' b: M+ CDekker Inc; 2003:211-238.
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development in a two-year-old boy induced by topical
- b/ y! G; T3 O1 @+ K7 l# A Yexposure to testosterone. Pediatrics. 1999;104:e23.3 E. _5 p: P% k: c& n
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Skeletal Development of the Hand and Wrist. 2nd ed./ n: M8 z; ?8 y" r
Stanford, CA: Stanford University Press; 1959.5 I+ _! r$ [% M# S$ j- x" ^. c7 @
6. Physicians’ Desk Reference. Androgel 1% testosterone,
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