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is a significant concern for physicians. Central# X$ {" l% A2 W5 K. E1 t6 Z3 c
precocious puberty (CPP), which is mediated3 \( E5 i6 O) I3 N5 }! z
through the hypothalamic pituitary gonadal axis, has
d+ f4 {/ S* i g5 [" Na higher incidence of organic central nervous system
! y$ i# i ?$ l, r! g; p0 klesions in boys.1,2 Virilization in boys, as manifested
* r. b/ T. W! s, E% X G2 Pby enlargement of the penis, development of pubic
: V/ O! | M0 N& \1 F. Bhair, and facial acne without enlargement of testi-# @9 U/ I! x* g2 K8 f; w
cles, suggests peripheral or pseudopuberty.1-3 We
2 U" U2 I! w& o/ O& d7 H0 Vreport a 16-month-old boy who presented with the
+ E. `1 k; n. a3 `/ q2 `' S5 renlargement of the phallus and pubic hair develop-4 i3 y7 `- H/ O3 z/ e k% y0 L
ment without testicular enlargement, which was due
7 e0 x1 }0 ]4 t% j oto the unintentional exposure to androgen gel used by
% o K/ D2 ^4 x+ nthe father. The family initially concealed this infor-
?$ b" k; w+ q$ P& K) E% D# qmation, resulting in an extensive work-up for this( ^; g- B9 S0 g7 B! D
child. Given the widespread and easy availability of& y2 j/ i. i2 Y+ f% s+ _
testosterone gel and cream, we believe this is proba-
( ~/ B2 O7 Y# F2 nbly more common than the rare case report in the5 J- x' l- K3 D* g' V
literature.4/ K+ @' I6 v, d: j2 \1 D& B. n+ \ @' f
Patient Report6 Y. r* P3 `+ s3 |6 E
A 16-month-old white child was referred to the ~' Z! q3 [. ~3 H5 z2 P
endocrine clinic by his pediatrician with the concern0 }( n4 @4 S/ A3 Q2 p
of early sexual development. His mother noticed
) g& N9 ]2 T3 J ylight colored pubic hair development when he was8 a* [: F! b* K1 T* v2 z
From the 1Division of Pediatric Endocrinology, 2University of
2 K# V" W6 i: U# TSouth Alabama Medical Center, Mobile, Alabama.+ a; {- N4 z' q; t0 L c c
Address correspondence to: Samar K. Bhowmick, MD, FACE,
7 m8 K# l5 P- p! d% C! rProfessor of Pediatrics, University of South Alabama, College of5 l, x8 U) x" p
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
) j8 K! J+ i! [- Ge-mail: [email protected].( p: q, j9 r6 q$ W" H+ U
about 6 to 7 months old, which progressively became
' S& n+ ]+ L6 N8 u( Q: wdarker. She was also concerned about the enlarge-
( f1 u8 \5 t, Qment of his penis and frequent erections. The child
* J) P4 b8 h! o% a+ m& K! Twas the product of a full-term normal delivery, with
& j% L8 p8 J* ta birth weight of 7 lb 14 oz, and birth length of! y+ n/ ]( U- ^* v/ ]
20 inches. He was breast-fed throughout the first year- k& U8 t2 b0 R* Y% C
of life and was still receiving breast milk along with1 h% y8 F0 c- E# U% S
solid food. He had no hospitalizations or surgery,
2 {: Z1 Z, h0 J, Y9 V4 g: Oand his psychosocial and psychomotor development$ s! W: Q. `! r* l$ ` s
was age appropriate.4 }* Y W( T+ I& U
The family history was remarkable for the father,' a6 H$ E8 z- z9 O- E2 d: l! M- e
who was diagnosed with hypothyroidism at age 16,! G4 h+ D1 ~2 s$ p) h, I/ g
which was treated with thyroxine. The father’s8 V* S- c/ I I4 n
height was 6 feet, and he went through a somewhat
9 Y9 ?6 r, Z. J) U u0 P1 ?" x' |3 wearly puberty and had stopped growing by age 14.
) P, M8 w% {; r( B9 ?4 iThe father denied taking any other medication. The4 O& Y( o$ u% c7 N
child’s mother was in good health. Her menarche% h4 B! u# s. m1 S; o
was at 11 years of age, and her height was at 5 feet
( }# K$ I& X: p, y5 inches. There was no other family history of pre-
# L5 l& g' D, @, acocious sexual development in the first-degree rela-
: _. d8 O$ X/ }/ Qtives. There were no siblings.
/ {2 b6 o2 F: B N2 x# B4 nPhysical Examination
9 @- B! b0 l8 x5 B$ \The physical examination revealed a very active," @; H8 V: V; e3 M" g8 c
playful, and healthy boy. The vital signs documented2 |7 l" p. l: `& L
a blood pressure of 85/50 mm Hg, his length was. ]4 o# O0 E, {5 R
90 cm (>97th percentile), and his weight was 14.4 kg
$ ?$ W% y! Z+ S9 v9 z, E(also >97th percentile). The observed yearly growth
7 J! E: b$ F" p$ n7 O% Bvelocity was 30 cm (12 inches). The examination of
- l% D; y3 l" s1 n: [2 A2 Uthe neck revealed no thyroid enlargement.
; _) [. \8 v, t$ I1 t1 DThe genitourinary examination was remarkable for
, @. E2 w7 e' B6 @enlargement of the penis, with a stretched length of; Q, C$ `! ?; ]& T1 u" {9 X! q2 ^
8 cm and a width of 2 cm. The glans penis was very well+ X1 [+ }+ [" }( q% K$ `
developed. The pubic hair was Tanner II, mostly around8 l+ V& j7 G* @4 U; ~" I% F" C. _
540
( d+ T% ~% O% V2 Tat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, _# b! Q& C4 Y! N7 ~2 S5 X+ Pthe base of the phallus and was dark and curled. The0 A! h5 c% z2 X% |0 V; H
testicular volume was prepubertal at 2 mL each.5 J' c; {; m! N3 x. P$ M' @
The skin was moist and smooth and somewhat
5 E' W8 O+ a3 W9 }9 koily. No axillary hair was noted. There were no
+ P; o: l l1 |abnormal skin pigmentations or café-au-lait spots.
! k6 U! U0 l1 i4 u6 \* BNeurologic evaluation showed deep tendon reflex 2+
3 C& j' ~1 n* Z% @* {bilateral and symmetrical. There was no suggestion
( m0 c- @9 x5 x' ~0 tof papilledema.
, O* C, U6 G6 R, u. BLaboratory Evaluation
1 B1 k- b3 e [1 r) HThe bone age was consistent with 28 months by
: X! S1 q' f+ M- u7 e6 I, wusing the standard of Greulich and Pyle at a chrono-
2 R# f! E! Q7 t9 m% clogic age of 16 months (advanced).5 Chromosomal* u3 t; h4 u, `! [: @0 r) I
karyotype was 46XY. The thyroid function test- S0 O# V: R# @, k) R' P# L+ \8 N, ^# z9 d
showed a free T4 of 1.69 ng/dL, and thyroid stimu-/ t1 _6 Z' |! H& c, z' d! x
lating hormone level was 1.3 µIU/mL (both normal).
) v' h: p5 Q/ x# p4 v4 bThe concentrations of serum electrolytes, blood) [/ g4 M- S# N+ a
urea nitrogen, creatinine, and calcium all were& T; ^6 ~2 P( n7 U& U5 D# _
within normal range for his age. The concentration
1 v+ g/ [; o: ~" e6 _of serum 17-hydroxyprogesterone was 16 ng/dL
7 u" j( u: {* d$ Y" s3 ^0 p6 r8 q(normal, 3 to 90 ng/dL), androstenedione was 20' Y, x2 F# p9 |- j: F2 l, z2 N# j" e: r
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
) ~) X7 G! h9 X& O& Zterone was 38 ng/dL (normal, 50 to 760 ng/dL),; q; Y1 ]8 C; T. b. U
desoxycorticosterone was 4.3 ng/dL (normal, 7 to6 ]9 J' u, ]- X# k: \. |
49ng/dL), 11-desoxycortisol (specific compound S)
- E3 u2 h1 z# C' }4 N( w, h9 Rwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-% s# p9 U& Y" _6 I& V( \0 Z) J) C
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total ]* v! Q% U* y; ]0 L
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
. y b/ J: d M2 A z' S Yand β-human chorionic gonadotropin was less than, p! ^" i! [" q/ _- z
5 mIU/mL (normal <5 mIU/mL). Serum follicular
1 w8 U7 O* |: _0 Istimulating hormone and leuteinizing hormone! \4 i. e4 {4 U. o, m
concentrations were less than 0.05 mIU/mL
3 N1 g6 J- g1 j6 u( r1 ]5 ^; A(prepubertal).
0 g- t p* x# h+ G9 n# E8 ^The parents were notified about the laboratory
; D6 A( r0 F& m) h* |8 a) r3 ?% f; D/ Bresults and were informed that all of the tests were
0 M- ^% g( ~: F9 U5 n7 Q+ ]normal except the testosterone level was high. The) _: n+ f" d8 z( Z& g3 C1 _% K
follow-up visit was arranged within a few weeks to, ?+ d/ `* ^- Q6 W$ U3 R
obtain testicular and abdominal sonograms; how-% ]+ H5 x6 T5 e
ever, the family did not return for 4 months.
1 L# i) i0 f$ T A' EPhysical examination at this time revealed that the
; J+ K+ F5 U- r* `, ?( Z @child had grown 2.5 cm in 4 months and had gained
3 o0 Q% I0 l Z4 g2 kg of weight. Physical examination remained
5 {: X; h+ P3 U# K& h. a) \unchanged. Surprisingly, the pubic hair almost com-2 R0 y& M/ f8 ^$ D, D; s' H
pletely disappeared except for a few vellous hairs at
" B' Z' I% \6 g# X; i, G Dthe base of the phallus. Testicular volume was still 21 [3 M+ D- S# Q3 l1 _: v% S3 ~& B
mL, and the size of the penis remained unchanged.* M6 l6 e1 F) L9 M6 p
The mother also said that the boy was no longer hav-
& r$ v1 W5 ^4 P" ]- ^ing frequent erections.
- e# X1 H- T, ]+ v1 aBoth parents were again questioned about use of
" s$ P3 ?7 n+ jany ointment/creams that they may have applied to
& i S0 ^) `, @1 Z) bthe child’s skin. This time the father admitted the
! P8 G( [- [; Q% V1 P4 P/ W) STopical Testosterone Exposure / Bhowmick et al 541) m S: v* p @. o d# s
use of testosterone gel twice daily that he was apply-
) g1 {6 W' M$ U; W- }6 X* B* oing over his own shoulders, chest, and back area for
6 S4 r% e5 Y" f) T |. S2 ea year. The father also revealed he was embarrassed
' N% e L* m! @, B8 J) d8 A4 Wto disclose that he was using a testosterone gel pre-- f G, Q" W+ o" N8 O! G0 n
scribed by his family physician for decreased libido7 o: \0 n* i' Q: U: H
secondary to depression.
4 e8 I) U6 j c6 q& gThe child slept in the same bed with parents.
. c: k/ I1 n7 eThe father would hug the baby and hold him on his
3 [5 ]4 ]" ]! vchest for a considerable period of time, causing sig-
0 @4 x! }' M& |* D; Q' `2 Cnificant bare skin contact between baby and father." A5 p. F& _" R E1 c
The father also admitted that after the phone call,
- }; V6 c3 c4 |- j" `when he learned the testosterone level in the baby
: z7 a) i0 J& v5 ~9 `8 w" `was high, he then read the product information
( \5 W# e( ~: z. {7 u' M. J- h9 T7 P, Jpacket and concluded that it was most likely the rea-6 s0 O. a v1 e" X6 u) v
son for the child’s virilization. At that time, they' b" V+ u& F0 a* S3 A' z
decided to put the baby in a separate bed, and the! N: }$ ` L' l) u
father was not hugging him with bare skin and had4 i3 u- T, v! G# O- [; p
been using protective clothing. A repeat testosterone! ?& c% L4 G9 W& O& G' x0 ^
test was ordered, but the family did not go to the
5 F7 X# s( A/ \% z3 N. [laboratory to obtain the test.1 b8 f$ Y: B# R& j5 G
Discussion
$ \. l% V: L! h Y4 c5 W, x* WPrecocious puberty in boys is defined as secondary
/ d0 Z: @( w/ K3 F7 Y. T- Y3 Wsexual development before 9 years of age.1,46 t7 F' B% z( b1 q8 W! h2 J
Precocious puberty is termed as central (true) when* r" c# x) R6 f. o) ?
it is caused by the premature activation of hypo-
( {8 d# j! n3 f( Mthalamic pituitary gonadal axis. CPP is more com-
4 ?' F, B; i' X8 Wmon in girls than in boys.1,3 Most boys with CPP
; ^1 {; n& F. p9 L* s, Cmay have a central nervous system lesion that is" ]8 Z4 d8 w! a3 x R
responsible for the early activation of the hypothal-: c. v% S) j2 Y l- F0 W1 I9 Y+ j1 h
amic pituitary gonadal axis.1-3 Thus, greater empha-
. ~4 j8 k1 {% P% i' H- Q; r6 o. Ysis has been given to neuroradiologic imaging in
2 K1 G* a, h) T k. bboys with precocious puberty. In addition to viril-
( k! X' N. [; U$ b# H; J7 ^ization, the clinical hallmark of CPP is the symmet-
! c4 \! ^; G% V8 D9 j7 `! [rical testicular growth secondary to stimulation by
. [3 L& ~' Q' D1 Lgonadotropins.1,3
% K/ l# F% f0 O RGonadotropin-independent peripheral preco-
8 W6 x* k. g6 h, I2 Mcious puberty in boys also results from inappropriate
0 _+ | G5 I6 |& C# ~, Aandrogenic stimulation from either endogenous or
/ M( n. V/ I( i+ T) r3 Rexogenous sources, nonpituitary gonadotropin stim-
( w% u+ [2 d7 x: x, d$ \ulation, and rare activating mutations.3 Virilizing h# a' R0 l# m0 `) L
congenital adrenal hyperplasia producing excessive7 D+ @" W. M% D3 w
adrenal androgens is a common cause of precocious
1 N! H( _8 C+ r# O6 f, Cpuberty in boys.3,43 G4 E% F5 o+ i
The most common form of congenital adrenal
6 D, c$ O& [8 Ghyperplasia is the 21-hydroxylase enzyme deficiency.
. V& n! c6 `6 p# jThe 11-β hydroxylase deficiency may also result in
, P7 [5 E- k" h, t; S& hexcessive adrenal androgen production, and rarely,
# G0 m# H4 V3 yan adrenal tumor may also cause adrenal androgen
& g4 B2 E: z4 s% @2 L) I. a" hexcess.1,3
' Y3 v) _2 M. s* o' \( Lat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from6 x- I, W" S J6 `5 e5 ]
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
: P9 V- b& @# b4 J% H8 H( E5 S# cA unique entity of male-limited gonadotropin-
/ D+ O8 P4 R H+ M! Windependent precocious puberty, which is also known
( w. V0 o4 O1 C% `as testotoxicosis, may cause precocious puberty at a5 i" u! G9 r# d2 v- `; L
very young age. The physical findings in these boys
, a( I0 N- K1 owith this disorder are full pubertal development,
* l% y' O" l/ c$ | v" @including bilateral testicular growth, similar to boys/ A$ L/ y9 F, _/ g
with CPP. The gonadotropin levels in this disorder3 U5 X: b! z/ u$ z
are suppressed to prepubertal levels and do not show
1 _# Z7 N. S8 [( n' i6 Tpubertal response of gonadotropin after gonadotropin-
; M8 L% L: o x* J3 oreleasing hormone stimulation. This is a sex-linked' Q1 |. h6 q. [' D5 F3 D
autosomal dominant disorder that affects only, t$ P s0 C3 o$ w5 o
males; therefore, other male members of the family
! i* s% @; m3 Y6 }4 E' {may have similar precocious puberty.3
& Z& ]( S( S" K9 o5 ^" ]In our patient, physical examination was incon-
/ F+ r9 t( }0 g. D' _- I: Ksistent with true precocious puberty since his testi-
1 ~3 R2 Y, B7 {% P' M T0 Q5 bcles were prepubertal in size. However, testotoxicosis
1 E, }2 |$ R: P3 fwas in the differential diagnosis because his father
( ]2 R- \6 m% p! |started puberty somewhat early, and occasionally, e" V7 }# J) a7 [( f
testicular enlargement is not that evident in the
* C5 n6 S, }+ |* J; _4 e$ Y! zbeginning of this process.1 In the absence of a neg-
2 y5 c. b& ~5 N0 E! A! h" q) Gative initial history of androgen exposure, our
& T& h) a ?2 J0 e! |) z1 U2 T9 ybiggest concern was virilizing adrenal hyperplasia,; I/ \2 E' s. c$ C3 A7 ?. h7 u
either 21-hydroxylase deficiency or 11-β hydroxylase% Y& v- Y* t: o6 p; @) ^1 c |/ e
deficiency. Those diagnoses were excluded by find-
. j6 S% R0 \6 E. Z3 ~ing the normal level of adrenal steroids.7 [4 [% @5 R6 N: c( W( r4 U, G
The diagnosis of exogenous androgens was strongly
& B" M) ?& |9 a/ j) }$ ^suspected in a follow-up visit after 4 months because
. R9 h9 H9 \/ [) v r- q1 G" Hthe physical examination revealed the complete disap-% W2 ~: J2 e( {5 ]
pearance of pubic hair, normal growth velocity, and; w U4 W5 [* V {8 R9 D+ r+ o; d
decreased erections. The father admitted using a testos-
! c2 J* y/ Y$ X% P) ~7 x" w+ _terone gel, which he concealed at first visit. He was
9 ~4 U" z z8 u9 {3 `! Ausing it rather frequently, twice a day. The Physicians’
# H8 ^4 d2 q6 w. D* i5 hDesk Reference, or package insert of this product, gel or# w- l8 |. O9 ~. Z! Z
cream, cautions about dermal testosterone transfer to
: \( M; Z( b1 d2 B! @8 qunprotected females through direct skin exposure.
. ~. b4 w% Q# D/ i# A' E7 T8 q( j1 t* {* uSerum testosterone level was found to be 2 times the
0 A( D$ o5 D6 R7 F5 t) f0 B* I7 obaseline value in those females who were exposed to' c" V0 h4 q# M3 L0 _/ L, T( U
even 15 minutes of direct skin contact with their male9 l4 l$ y, g+ N3 o
partners.6 However, when a shirt covered the applica-
( r: |" Z9 |9 E/ htion site, this testosterone transfer was prevented.- T) t7 _0 g! q+ y9 H9 G% o
Our patient’s testosterone level was 60 ng/mL,/ e+ y; _) r e# ~3 R2 {
which was clearly high. Some studies suggest that% N4 j- y/ {. j% }
dermal conversion of testosterone to dihydrotestos-
' n2 c" w8 j$ W0 a' @terone, which is a more potent metabolite, is more1 e* Q. N# m2 D; x
active in young children exposed to testosterone# X, j; G, J* \; n) J/ M
exogenously7; however, we did not measure a dihy-- J& R8 ?1 {+ B8 N/ v
drotestosterone level in our patient. In addition to
0 j I/ a @" W8 V' xvirilization, exposure to exogenous testosterone in2 L+ a; A1 D( Q2 y' q' @- n4 @: j. [ g
children results in an increase in growth velocity and
- l" J& c6 {& C1 radvanced bone age, as seen in our patient.; E r0 k& A; v6 ?2 c! b% z! h) `
The long-term effect of androgen exposure during8 Y. t, P1 D5 `/ ^
early childhood on pubertal development and final
( N! G# {- H) ]8 F' c! iadult height are not fully known and always remain
+ R8 }% M$ L4 Na concern. Children treated with short-term testos-
6 w' [/ |& N8 E1 a+ Gterone injection or topical androgen may exhibit some
$ }7 D/ e% y: ]7 H! m! K) s) l" aacceleration of the skeletal maturation; however, after/ h$ b [6 u# e+ U
cessation of treatment, the rate of bone maturation5 g: \ K0 |, o( ^3 g' H" b" B
decelerates and gradually returns to normal.8,9
' Z7 _9 s7 _$ c2 R5 A8 w# q1 rThere are conflicting reports and controversy+ `1 I/ F/ n# a5 W( Z
over the effect of early androgen exposure on adult
& j" b& Y( z2 bpenile length.10,11 Some reports suggest subnormal" r% J- l$ F$ p& Z+ n/ T
adult penile length, apparently because of downreg-
$ ^$ T. D1 \& B7 B+ s+ W7 xulation of androgen receptor number.10,12 However,
; i+ p8 m2 O$ h6 {, C/ U: f; }Sutherland et al13 did not find a correlation between
3 h0 O, e( V0 ^childhood testosterone exposure and reduced adult
2 M. o" \) H6 p) K1 p3 _6 Openile length in clinical studies.. }5 K7 g" ^7 L! F% G$ T& t a
Nonetheless, we do not believe our patient is/ w6 [! P: x8 V+ b& {9 \- Y- L
going to experience any of the untoward effects from4 B" \1 O' j) ~, X! E. ~
testosterone exposure as mentioned earlier because7 o0 z0 h1 ]( I G2 [/ Q% S
the exposure was not for a prolonged period of time.$ E/ {- o1 o# o, {+ X
Although the bone age was advanced at the time of% R% a5 w* n1 o% O2 K# l0 `* v) L
diagnosis, the child had a normal growth velocity at! X! q; O" R) G
the follow-up visit. It is hoped that his final adult
" r7 ~% M" x3 g Y+ N, Sheight will not be affected.
9 Y' A ?2 b7 T l% G, ZAlthough rarely reported, the widespread avail-3 Z# E/ H. n3 D6 V$ G9 U
ability of androgen products in our society may e$ Y t' W" O
indeed cause more virilization in male or female f; Z$ m( w5 X% Y
children than one would realize. Exposure to andro-) W! B: Y$ ~3 _) Y5 H
gen products must be considered and specific ques- C' B( e2 t* O. Q9 |& `
tioning about the use of a testosterone product or
/ F0 @* Y5 o+ T, ~2 f1 ogel should be asked of the family members during
. [1 a7 B% {* M9 b/ D$ ythe evaluation of any children who present with vir-! n$ K! b: }2 I8 L0 S
ilization or peripheral precocious puberty. The diag-! u4 {5 D0 B5 p% b$ F3 s
nosis can be established by just a few tests and by& z$ b% r! X' J6 W4 G
appropriate history. The inability to obtain such a
4 J! {/ ^- y2 h7 Whistory, or failure to ask the specific questions, may& g7 L) T) p" n2 G% f% z+ X, c0 x
result in extensive, unnecessary, and expensive6 i& n# w! z* H6 ?7 [
investigation. The primary care physician should be; I+ \/ a" h/ m- b! J' o
aware of this fact, because most of these children" n6 {5 n2 o% U3 q* u
may initially present in their practice. The Physicians’( Y, n' r0 O9 R2 _
Desk Reference and package insert should also put a+ f& s" W6 T+ s' r) a' V
warning about the virilizing effect on a male or6 K `* L4 n5 L$ u
female child who might come in contact with some-3 Q* O7 }" O/ [) n# O
one using any of these products. E# i6 ]" h/ N
References
& Q" ]6 I$ H7 n1. Styne DM. The testes: disorder of sexual differentiation3 z+ T5 I- h8 \' \1 }- U3 P; ]
and puberty in the male. In: Sperling MA, ed. Pediatric/ ~' M' |5 n7 J8 [+ E
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;- w3 }" z5 _& Y4 p V: u/ i' [. J
2002: 565-628.! @$ I/ t- D3 i" z R/ u
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
% g6 c+ i6 g/ D6 O$ \! q8 cpuberty in children with tumours of the suprasellar pineal4 G9 v& j' c4 |4 p# {, Q" k4 k
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: }' {# n6 I4 Careas: organic central precocious puberty. Acta Paediatr.3 x# {8 @0 l0 e: j. [( |5 P
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' B2 t' a! G" g5 u1 u$ F3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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0 T! b0 G& q8 Z1 X& w- J; H" {4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual o) \+ s. I9 f3 |' X h* ?6 s5 [
development in a two-year-old boy induced by topical M( G6 ?! Y8 Q7 e
exposure to testosterone. Pediatrics. 1999;104:e23.
/ I; b3 x1 {7 v, C; [5. Greulich WW, Pyle SI, eds. Radiographic Atlas of3 [5 c [' u. `2 U' g, b
Skeletal Development of the Hand and Wrist. 2nd ed.
3 I4 ~5 r/ h' s1 d; oStanford, CA: Stanford University Press; 1959.5 q0 F: T# T; z4 c4 o: |
6. Physicians’ Desk Reference. Androgel 1% testosterone,) \1 p9 W$ p# Q) d: i8 ^3 [2 ]
Unimed Pharmaceutical Inc. Montvale, NJ: Medical# ?# L @* F3 ~8 }6 R: _
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