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is a significant concern for physicians. Central8 m5 j* {. A# H9 f2 d
precocious puberty (CPP), which is mediated* P% s3 j0 i3 s! U& s( m8 W
through the hypothalamic pituitary gonadal axis, has
) F% b* K0 I; O4 Ha higher incidence of organic central nervous system
" n9 M# B% Y, k8 X, W; t& clesions in boys.1,2 Virilization in boys, as manifested0 v) c$ H+ j! ]
by enlargement of the penis, development of pubic
( i8 v& |) L1 ?% r. F5 _hair, and facial acne without enlargement of testi-
; U9 _+ C/ M% v) fcles, suggests peripheral or pseudopuberty.1-3 We, S, \5 s5 k, P- b9 x# {% ?
report a 16-month-old boy who presented with the1 ?3 e, z% e2 R/ q$ j) k
enlargement of the phallus and pubic hair develop-; B' A3 ~ `: v/ h
ment without testicular enlargement, which was due9 h2 h6 P8 ]# G# R# [2 l5 x' D
to the unintentional exposure to androgen gel used by9 |$ M( X+ F8 q B
the father. The family initially concealed this infor-
! A* z8 j0 K* W0 umation, resulting in an extensive work-up for this
5 |1 K0 A7 v8 X# K& ochild. Given the widespread and easy availability of( q9 H( r4 l( Z( ]- ~
testosterone gel and cream, we believe this is proba-+ ?$ L1 D6 j4 Y- m( w1 h
bly more common than the rare case report in the1 q' `$ B# F& ?" r5 l* P
literature.4: H- z* P' o6 ~; Z, T5 K* ^8 g
Patient Report
; h; z. N6 U. F1 r/ f/ l4 q! xA 16-month-old white child was referred to the/ O) O# B2 j. t- O8 m5 j- d
endocrine clinic by his pediatrician with the concern' N! J# @: y! X s
of early sexual development. His mother noticed3 y5 `* E0 x7 M) s
light colored pubic hair development when he was
* i$ D; |2 \) H1 q2 o: i2 `/ |From the 1Division of Pediatric Endocrinology, 2University of% j' \8 x1 }% u% v# R2 m! z: S
South Alabama Medical Center, Mobile, Alabama.
% I8 g4 D1 |; I; EAddress correspondence to: Samar K. Bhowmick, MD, FACE,
2 m: F0 d$ W# H" j% B( O( r' O2 fProfessor of Pediatrics, University of South Alabama, College of. A( ]( T Z2 e0 P1 y. i
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;0 g' r# N. O$ ~$ o
e-mail: [email protected].+ ?: i( m" W# C% ~( q+ x
about 6 to 7 months old, which progressively became2 j3 q. ~% o: h) O" K
darker. She was also concerned about the enlarge-; v+ R' K. _3 o, Q9 k/ N5 R$ i7 z
ment of his penis and frequent erections. The child2 U1 M4 ^% h4 W
was the product of a full-term normal delivery, with
, o/ ?/ d) R1 o7 \& ]# n' _a birth weight of 7 lb 14 oz, and birth length of, {6 ?* T8 B6 d! X; W* C& m
20 inches. He was breast-fed throughout the first year
3 o' Y! r# H+ i) U, M% J' Pof life and was still receiving breast milk along with
0 F8 ^% r C/ x6 ?% Xsolid food. He had no hospitalizations or surgery,8 l6 [4 O, y# B: M3 s* t( v
and his psychosocial and psychomotor development& j n/ y! T3 }# E( T: m: q
was age appropriate.! ~( f6 I+ P, m1 c, S
The family history was remarkable for the father,5 Q/ W! y* F' W: i
who was diagnosed with hypothyroidism at age 16,
/ P. B k3 \7 N& g0 Z7 \which was treated with thyroxine. The father’s
* b$ @4 _4 s' y2 Y: xheight was 6 feet, and he went through a somewhat
9 @) P F/ ]6 pearly puberty and had stopped growing by age 14.
1 s4 f% V) T- J' mThe father denied taking any other medication. The
6 @! [) J7 ]8 z/ Schild’s mother was in good health. Her menarche2 }$ }/ u1 ]" i1 H2 k3 |
was at 11 years of age, and her height was at 5 feet
6 b% L' Y' ]+ A# B+ @4 ~ ]4 v5 inches. There was no other family history of pre-
8 H' w+ i% l% C) K% D9 Y4 ?4 Hcocious sexual development in the first-degree rela-4 C ^4 Y9 Y) p) \- A( U" ]( s
tives. There were no siblings.
. V7 u* V3 M) [Physical Examination+ L5 ?8 V' }; G: X s+ |
The physical examination revealed a very active,
4 X) i- X; Z; [: \# splayful, and healthy boy. The vital signs documented6 j9 r# [, t6 P" d+ d
a blood pressure of 85/50 mm Hg, his length was/ ]$ }6 y+ ^) L1 c6 c. i
90 cm (>97th percentile), and his weight was 14.4 kg
- X" F/ \- d" z* m$ A( @. @; c& q(also >97th percentile). The observed yearly growth! |0 K' I: ]+ e8 w* W8 u
velocity was 30 cm (12 inches). The examination of& M7 {0 r4 g4 ]/ _9 S8 Y
the neck revealed no thyroid enlargement.
P2 a, o( M9 B( LThe genitourinary examination was remarkable for
$ v/ L! X4 D$ Q% Renlargement of the penis, with a stretched length of
6 s( _$ f" [$ o9 w4 g& Z8 cm and a width of 2 cm. The glans penis was very well
5 ^ W4 _) w) u6 w u! \$ bdeveloped. The pubic hair was Tanner II, mostly around5 q8 B* u5 H) `, c5 Q5 b9 t
540
' b; {& M* S2 P$ }$ S; Uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
) X' Q' g8 t0 c* w! B- ythe base of the phallus and was dark and curled. The5 h" p0 @1 B1 u) ]
testicular volume was prepubertal at 2 mL each.
7 {- Y, y0 A6 E* @The skin was moist and smooth and somewhat9 ?; q. \5 _" J5 @) a H
oily. No axillary hair was noted. There were no
2 o" I u* w8 w- w' Qabnormal skin pigmentations or café-au-lait spots.
, n2 F% A7 t" M9 WNeurologic evaluation showed deep tendon reflex 2+
, ~3 @4 i5 x2 Q0 u! D6 |. H& ?bilateral and symmetrical. There was no suggestion
[3 v$ P( p" r t) mof papilledema.1 Y; B# o7 q% R% i: ?. ~! p: u
Laboratory Evaluation8 t N9 a0 p! s) r9 D4 G" _
The bone age was consistent with 28 months by
# K) X7 Y' N2 s: X! r+ husing the standard of Greulich and Pyle at a chrono-
6 L' K w/ v& J' \ mlogic age of 16 months (advanced).5 Chromosomal
" Q. J1 y( k9 ` P* Y, P0 Mkaryotype was 46XY. The thyroid function test
" N% L# g3 }" L f3 rshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
+ t, T; Y5 E' V5 Hlating hormone level was 1.3 µIU/mL (both normal).6 [+ s- f; J% p5 J' T' V$ s
The concentrations of serum electrolytes, blood
) y3 Y% W0 n- @6 @/ U$ m4 A2 |$ wurea nitrogen, creatinine, and calcium all were- w7 z2 j- a# K3 t) v
within normal range for his age. The concentration, v& g9 J* k, j4 v3 W+ ^
of serum 17-hydroxyprogesterone was 16 ng/dL# s) q& `$ X9 j
(normal, 3 to 90 ng/dL), androstenedione was 20, m* j5 u6 p! s/ N& U
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-% m, @! C) }! L$ w$ P; ]% z3 j
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
7 }' L- o: N( h. b7 a5 Cdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
: G, W& G7 R* N7 ~" y49ng/dL), 11-desoxycortisol (specific compound S)
8 o: s: v9 K; b( bwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
6 l. G9 L! Q6 s4 } ?tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
# m% u- \# f) B* [8 E8 Atestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
5 K. y2 t7 h4 I. dand β-human chorionic gonadotropin was less than
( B2 R% d# Z5 c. U5 mIU/mL (normal <5 mIU/mL). Serum follicular
! H; J. O; }! h" T4 xstimulating hormone and leuteinizing hormone
0 h, u' Z! x7 J) `" }concentrations were less than 0.05 mIU/mL
4 T9 E. M% u) R+ \; d(prepubertal).; K8 q' h1 Z: {$ }- O0 P
The parents were notified about the laboratory
$ M0 Y2 B' K5 a! h2 uresults and were informed that all of the tests were
6 I- ]" N8 S' Z Q1 qnormal except the testosterone level was high. The
8 v; J+ {; i5 sfollow-up visit was arranged within a few weeks to# |( Z) E* V# Y1 |) i
obtain testicular and abdominal sonograms; how-
3 t2 E, `; `: T. \3 v# oever, the family did not return for 4 months.
9 j! R' `# N/ dPhysical examination at this time revealed that the
, G4 r( c. `+ ~' d& achild had grown 2.5 cm in 4 months and had gained
+ F* b9 H0 T' Y( i# B# b1 a' r2 kg of weight. Physical examination remained
" R: N; d# p9 E. vunchanged. Surprisingly, the pubic hair almost com-' s' y! u I5 v/ B
pletely disappeared except for a few vellous hairs at
6 s9 v% B1 W8 `# }% rthe base of the phallus. Testicular volume was still 2, `+ u5 h3 l1 t/ [8 y
mL, and the size of the penis remained unchanged.$ x5 ^: \/ _' E1 e. [
The mother also said that the boy was no longer hav-- F* }2 H \7 x- j/ _ P
ing frequent erections.$ ]4 W% q" T3 m, I5 [" F2 B
Both parents were again questioned about use of
- i4 W' h* { n; cany ointment/creams that they may have applied to
{# {6 X: K! }9 J7 d# k! Ethe child’s skin. This time the father admitted the; u/ G/ \! t( N( E# R6 ]0 m+ Q
Topical Testosterone Exposure / Bhowmick et al 541# ?1 w, m6 B7 U* @: h0 {9 z1 P! k* l
use of testosterone gel twice daily that he was apply-+ C8 f1 G" ^# O1 _2 S; A% m# s2 D2 c
ing over his own shoulders, chest, and back area for
/ K5 M7 T& I( X) p/ la year. The father also revealed he was embarrassed1 j O. V. k3 n( h8 e
to disclose that he was using a testosterone gel pre-7 Y. l. v# [% k q" R* _9 w
scribed by his family physician for decreased libido, F, r6 Q9 B: _$ v ^( E; ^- G/ ?
secondary to depression./ `, P: R: t0 `9 u- c
The child slept in the same bed with parents.
% S# V' V6 a( x6 n& w( e6 S( l( n" _The father would hug the baby and hold him on his& \: i( C! S& h! P: }
chest for a considerable period of time, causing sig-
* {+ I% d$ q d8 y. q$ _+ _" P) snificant bare skin contact between baby and father.- G e6 V2 C# ^/ S
The father also admitted that after the phone call,/ ]7 h( A% @ `
when he learned the testosterone level in the baby- F8 q( ~5 m G2 O* i% g
was high, he then read the product information
" O& D3 b: A I9 P, R/ I" Vpacket and concluded that it was most likely the rea-- R3 k# s" a, T; l# O7 p% w
son for the child’s virilization. At that time, they
; D) i6 a* o* J$ ^7 i% Udecided to put the baby in a separate bed, and the9 c1 s$ R: B' { i$ {/ Z
father was not hugging him with bare skin and had
% ?8 G, a) b' X) m ~6 ebeen using protective clothing. A repeat testosterone" h+ D+ t3 c4 y% J% L) z0 i
test was ordered, but the family did not go to the
$ e2 G2 \; D, \( [laboratory to obtain the test.
$ T8 n! a! I1 Z# z7 zDiscussion
- ]3 A4 v8 ?5 l# e; C& t" i. F& u: B/ NPrecocious puberty in boys is defined as secondary
0 a( A) n2 u# ksexual development before 9 years of age.1,49 G7 X& X& E" \$ J% U4 k5 S- L& [
Precocious puberty is termed as central (true) when
$ X7 ]- B; Q4 @it is caused by the premature activation of hypo-& }8 Z( r* r. y p
thalamic pituitary gonadal axis. CPP is more com-1 ?; p: ?- B0 F+ l9 e
mon in girls than in boys.1,3 Most boys with CPP0 Z% f, w" u% V& g0 P
may have a central nervous system lesion that is
% P* |0 {0 I, ~5 e) t) |! D5 qresponsible for the early activation of the hypothal-- {3 Q; J! A6 n
amic pituitary gonadal axis.1-3 Thus, greater empha-
$ f* V6 y1 j9 w0 D5 x4 k. ?; E Esis has been given to neuroradiologic imaging in
( V. w8 a' j9 h0 b" P {! hboys with precocious puberty. In addition to viril-5 M% k% O: W$ I @
ization, the clinical hallmark of CPP is the symmet-
! ]9 Y* U! I; R9 b& Irical testicular growth secondary to stimulation by
( W! t5 P- T; J3 zgonadotropins.1,3! N' h9 ?# K8 s% E
Gonadotropin-independent peripheral preco-
! N6 V( H( v* q; g- kcious puberty in boys also results from inappropriate) Y. Y7 @$ X$ G" k
androgenic stimulation from either endogenous or% r" _! S J9 Y5 i% c2 d! ?5 e v
exogenous sources, nonpituitary gonadotropin stim-" V; c) R6 o7 F- b' L
ulation, and rare activating mutations.3 Virilizing
" D$ T# X e5 u, tcongenital adrenal hyperplasia producing excessive
3 U% D2 b0 ?+ b1 Z! fadrenal androgens is a common cause of precocious3 _0 d( `3 p9 Y, ?5 ?
puberty in boys.3,4 V+ B- W* O2 v! k( i0 i
The most common form of congenital adrenal7 T p0 B7 F; \% ]) K
hyperplasia is the 21-hydroxylase enzyme deficiency.
( T5 D5 x& H( L( {The 11-β hydroxylase deficiency may also result in
, R3 m( z* }8 O+ X( n0 }* m& jexcessive adrenal androgen production, and rarely," ^+ ^# V4 v# U! W! ^: B- c, V5 V
an adrenal tumor may also cause adrenal androgen2 K( v; P# ~2 k4 n' H
excess.1,3
. r% g/ J( v& [1 [at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
6 G( h/ K- o; y: O* U% r5 o% `542 Clinical Pediatrics / Vol. 46, No. 6, July 20072 n2 _: g( `8 i# D) W/ Z
A unique entity of male-limited gonadotropin-+ ?2 W* G$ a5 M( E& Q
independent precocious puberty, which is also known
" ?% d4 M9 R+ oas testotoxicosis, may cause precocious puberty at a
3 E% u( X+ l- v5 r- B$ ^" uvery young age. The physical findings in these boys0 l c* F" n% n" z2 H2 m
with this disorder are full pubertal development,
7 u/ o/ ?% p& i6 J# S8 sincluding bilateral testicular growth, similar to boys
- C9 k& p5 p7 b+ Nwith CPP. The gonadotropin levels in this disorder
) B0 I) F# a) R! M% i5 kare suppressed to prepubertal levels and do not show
% W$ Q/ C2 E$ ^+ ]: D3 E, Qpubertal response of gonadotropin after gonadotropin-
# m' b4 b( W' c2 \6 H# M$ ^releasing hormone stimulation. This is a sex-linked7 W1 X3 S/ L$ Z8 F2 V7 V
autosomal dominant disorder that affects only' ~6 @/ o" T! l
males; therefore, other male members of the family4 q% z, ?2 C2 \7 |6 f
may have similar precocious puberty.33 b* E% Q$ X" u5 k* e5 j, h T
In our patient, physical examination was incon-: {$ n; S) S" r& L
sistent with true precocious puberty since his testi-
" v m8 \0 n; t" w) c# scles were prepubertal in size. However, testotoxicosis6 W6 @. k) e6 P
was in the differential diagnosis because his father5 U Z# L. q0 T% B
started puberty somewhat early, and occasionally,- U6 l& K/ V8 p) D' b3 t
testicular enlargement is not that evident in the
1 z5 W1 M9 s* r' [4 \6 vbeginning of this process.1 In the absence of a neg-9 `8 T% k/ S1 ?) k- E0 `8 @1 q
ative initial history of androgen exposure, our
% C6 I: ^$ I2 Ubiggest concern was virilizing adrenal hyperplasia,7 t/ d+ I6 q' F( m5 { N" K
either 21-hydroxylase deficiency or 11-β hydroxylase- d# x! @& g* F! x0 h B, [
deficiency. Those diagnoses were excluded by find-( T+ P5 U- a. l+ U* P0 P- V) _7 ?
ing the normal level of adrenal steroids.9 r* y% o, U4 z: T! N/ l
The diagnosis of exogenous androgens was strongly6 J1 U5 w; P. M; ^4 s; Y
suspected in a follow-up visit after 4 months because3 D; n) f# U& \9 \+ ?
the physical examination revealed the complete disap-: x5 E. U. n: y! D
pearance of pubic hair, normal growth velocity, and
5 e1 h% U3 R; F3 Pdecreased erections. The father admitted using a testos-9 D8 O) G& L4 @% R; J: J
terone gel, which he concealed at first visit. He was
+ x: p9 O; U k/ p; c" A5 ausing it rather frequently, twice a day. The Physicians’
4 d! i. g' R2 k, Z" F) ]# u% xDesk Reference, or package insert of this product, gel or
6 G9 k }) [& r* Ucream, cautions about dermal testosterone transfer to
* t9 i( Q$ i% @5 t( ]( z& f% i/ }; [unprotected females through direct skin exposure.6 o. m; J5 G- h9 v# ]% U3 G
Serum testosterone level was found to be 2 times the
% _5 N) Z6 P0 Z# sbaseline value in those females who were exposed to/ l) X( Z" y9 u4 G' T$ |8 J8 E
even 15 minutes of direct skin contact with their male N: v8 O1 e2 L Q" v3 G0 l, y* E
partners.6 However, when a shirt covered the applica-
' a1 Y J% w. _* Z- x* H) F6 x3 Z# ution site, this testosterone transfer was prevented.! @& m& q, s- j: o
Our patient’s testosterone level was 60 ng/mL,
0 H% G8 d6 b* i3 F' w' Q1 V5 _which was clearly high. Some studies suggest that1 K; O/ Y2 U: d# I4 i% z
dermal conversion of testosterone to dihydrotestos-
/ X% N& j) l% Cterone, which is a more potent metabolite, is more
# S9 u6 s2 G6 dactive in young children exposed to testosterone3 _2 C! ~4 i h) q' ]) k1 u$ r/ _
exogenously7; however, we did not measure a dihy-$ h- [( F6 E. \6 J! u7 d7 V1 x
drotestosterone level in our patient. In addition to8 v2 g0 t$ |! T0 d: E
virilization, exposure to exogenous testosterone in; {( q, u6 x* K7 L& X
children results in an increase in growth velocity and
) N3 R* `) ]3 n8 P# |9 B" Ladvanced bone age, as seen in our patient.
' Z6 b2 u( s$ }+ [+ N& rThe long-term effect of androgen exposure during, |$ G! W- C! W4 X! Z! g& @
early childhood on pubertal development and final5 X- y5 s: O3 I" Z. N' f3 Z* b
adult height are not fully known and always remain6 b* [2 ~4 }: l" ~; f
a concern. Children treated with short-term testos-
: {6 R9 @# z( [* M, \3 ^terone injection or topical androgen may exhibit some, }6 m; }& t% |* }4 q! \6 V
acceleration of the skeletal maturation; however, after0 b3 I/ y0 ?) i9 g
cessation of treatment, the rate of bone maturation5 y% `4 @. s I8 n' ]
decelerates and gradually returns to normal.8,9
2 G9 {$ k; U+ i& B, e5 A' AThere are conflicting reports and controversy* T; x4 j% k2 M
over the effect of early androgen exposure on adult L# F5 ?, J0 D; R5 j6 [: @% `
penile length.10,11 Some reports suggest subnormal" B4 C" W# \* h
adult penile length, apparently because of downreg-4 M) l. Q, j, H# i/ a; x4 Y
ulation of androgen receptor number.10,12 However,
8 o/ T3 N; W; R5 L7 r5 XSutherland et al13 did not find a correlation between/ j0 J3 R& a* a" M
childhood testosterone exposure and reduced adult0 ]- G2 c, F+ N
penile length in clinical studies.5 n+ P: Z( h2 L
Nonetheless, we do not believe our patient is
/ g2 A8 Z+ v( Ggoing to experience any of the untoward effects from
, a K3 Y* y+ f) Y, ntestosterone exposure as mentioned earlier because
$ v9 J8 Y( S! o" d0 o2 f& ^+ Kthe exposure was not for a prolonged period of time.& C# p/ r: }. ~
Although the bone age was advanced at the time of% d6 z4 z0 l, o% |$ |
diagnosis, the child had a normal growth velocity at: {2 Z. o3 s( t, Q4 |4 E
the follow-up visit. It is hoped that his final adult5 W s; W6 ]4 Y ?6 J2 J
height will not be affected.+ a6 k0 A- L t, A- ` o" D
Although rarely reported, the widespread avail-7 @ O6 B$ Y4 T. T
ability of androgen products in our society may
+ G& I& Y. P( a- q, _/ @* pindeed cause more virilization in male or female/ X4 {% T! b$ L, |$ ^ C$ Q
children than one would realize. Exposure to andro-3 X) J9 j7 ~" M% t
gen products must be considered and specific ques-
5 N2 C9 j* o4 N4 A& `; Mtioning about the use of a testosterone product or4 ?* s, F& h$ U7 f: n% Y
gel should be asked of the family members during7 t4 M' X |% w. x3 o. f% t
the evaluation of any children who present with vir-
, \) e7 n; Y9 }: S; iilization or peripheral precocious puberty. The diag-8 y7 l6 ?' Y& O+ ]
nosis can be established by just a few tests and by! ?. i: M3 ?6 b, `% R
appropriate history. The inability to obtain such a) u! w6 I/ J0 m3 p8 b3 ~$ d
history, or failure to ask the specific questions, may1 h7 \7 F! O1 r9 ~6 l
result in extensive, unnecessary, and expensive4 l1 p! A0 e* m% ~& h' [8 P
investigation. The primary care physician should be% `/ A' J! O$ K( f
aware of this fact, because most of these children# h: | S1 L- n+ c' i
may initially present in their practice. The Physicians’8 d! v [0 `- f' J& M
Desk Reference and package insert should also put a1 s/ d& i) g1 F! G) p8 b
warning about the virilizing effect on a male or
, z7 R( B u0 o& N/ a, A7 e+ \female child who might come in contact with some-! U$ j* J1 ]7 n8 [( P4 F( z/ N6 l3 c
one using any of these products.
) H, n* }7 y4 Z2 eReferences
' ^! S$ G7 n- K/ B9 I* R1. Styne DM. The testes: disorder of sexual differentiation! d" N6 S; D+ I4 M- }+ z# \: q$ S
and puberty in the male. In: Sperling MA, ed. Pediatric
8 B1 K X9 z# r* g1 Z) j/ N* H% a9 y. SEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
& t+ H- K: |) s' Z7 w2002: 565-628.% U5 D) ^7 Y: B: v
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
) Q9 D9 }' i- O& a" H7 Gpuberty in children with tumours of the suprasellar pineal
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" t$ B/ \# w1 c7 Z8 lTopical Testosterone Exposure / Bhowmick et al 5436 X) c! V/ b7 c, n) r0 R! t" q' e6 \
areas: organic central precocious puberty. Acta Paediatr.! y# v( \: {# `/ y: @* ~7 P2 O
2001;90:751-756.
+ l6 y4 o$ ]0 S, C: D3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.* k) T9 g! V6 L0 h: v
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
# P+ I" ]. [" T/ D* QDekker Inc; 2003:211-238.
7 m4 e: E: v) q4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
; C. K! |& i5 U5 @9 Odevelopment in a two-year-old boy induced by topical. g1 {$ {8 M! b0 [1 x: ?
exposure to testosterone. Pediatrics. 1999;104:e23.; ~9 ]9 b7 e9 T# J9 P* O$ S
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
) w' o) M4 p }8 T& Z ISkeletal Development of the Hand and Wrist. 2nd ed.
1 o* d2 a( f8 J- Y6 M4 TStanford, CA: Stanford University Press; 1959.- k& i" w6 I: W* L" e* \1 o8 L
6. Physicians’ Desk Reference. Androgel 1% testosterone,* Y) h7 Y4 O7 M$ w4 }
Unimed Pharmaceutical Inc. Montvale, NJ: Medical8 T) U) a% ? ^) r% C
Economics Company, Inc; 2004:3239-3241., N7 c) f) y3 S; K0 R% W
7. Klugo RC, Cerny JC. Response of micropenis to topical; w8 i; B9 o) B) ^
testosterone and gonadotropin. J Urol. 1978;119:3 L. F7 P0 e, {: J5 r* L1 I
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