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is a significant concern for physicians. Central+ @0 S; [* h& T9 T( ~1 W0 l
precocious puberty (CPP), which is mediated
1 Q- F |2 V6 G4 {% j+ Sthrough the hypothalamic pituitary gonadal axis, has0 |5 c) k' }" V" Z: h
a higher incidence of organic central nervous system
$ a4 w2 N: M% dlesions in boys.1,2 Virilization in boys, as manifested) U& Q5 M! G' ]5 \! D
by enlargement of the penis, development of pubic4 ^( S* I6 }" b& X
hair, and facial acne without enlargement of testi-; O. I5 I; f% a+ ]6 {
cles, suggests peripheral or pseudopuberty.1-3 We+ Q; B# ?/ r) o6 k0 l- T& D9 m$ }9 Z
report a 16-month-old boy who presented with the
* f3 \' t* P9 A8 Q" t5 Y. Y3 aenlargement of the phallus and pubic hair develop-
' T9 C) z E& z) W0 y3 D3 ?9 Z8 K: Tment without testicular enlargement, which was due
, |; r& V4 H* P: i7 Qto the unintentional exposure to androgen gel used by( z% [! Q I3 m% O% L
the father. The family initially concealed this infor-" F2 f" I, R g% V! @1 {1 v+ {0 s
mation, resulting in an extensive work-up for this
# ` Y: S) X( u5 N, G, Y7 Zchild. Given the widespread and easy availability of- Q8 i) A- @7 B/ `8 k
testosterone gel and cream, we believe this is proba-
* K2 p2 }" y* pbly more common than the rare case report in the
! X" {) j4 h! P0 B& Y4 ]+ x2 \literature.4
5 H! L4 c8 s7 XPatient Report8 K% a5 m4 P* E( t$ Q& j
A 16-month-old white child was referred to the V4 d4 l' B) B1 e$ z
endocrine clinic by his pediatrician with the concern& ]8 x# D; M, }2 M
of early sexual development. His mother noticed7 K6 p* S9 ?# }1 N; k* R4 F$ ~, j
light colored pubic hair development when he was
* W$ | N8 ~6 B' `. Z. H) R, [, CFrom the 1Division of Pediatric Endocrinology, 2University of
) W6 X. g/ ]+ A' C3 I& U' X+ pSouth Alabama Medical Center, Mobile, Alabama.
^0 B2 G9 \/ Z+ u% l5 p3 H5 jAddress correspondence to: Samar K. Bhowmick, MD, FACE,& ]. j) U \+ K( i/ t V: t. h
Professor of Pediatrics, University of South Alabama, College of- [4 B+ `& K8 X: }3 b
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;/ x+ y" Z& x. i F5 V3 d9 g! B j
e-mail: [email protected].
2 W: K- G- \2 X labout 6 to 7 months old, which progressively became5 k+ z/ s. T+ g
darker. She was also concerned about the enlarge-3 f, r0 ~4 z2 r+ k
ment of his penis and frequent erections. The child
9 j/ U- k; r% ?$ Z4 N2 I7 S% `was the product of a full-term normal delivery, with) p2 l# s, {( |
a birth weight of 7 lb 14 oz, and birth length of# f5 n! T, C. E5 t" G
20 inches. He was breast-fed throughout the first year
: f3 Q. p' Y8 H; b/ rof life and was still receiving breast milk along with: |9 _& u& K, g5 ^3 S
solid food. He had no hospitalizations or surgery,
- D& }! V! C1 Y5 j! Eand his psychosocial and psychomotor development( e1 R7 @4 ?8 Q! ]8 [0 K
was age appropriate.
/ Y8 A. `# n' L4 _5 A; nThe family history was remarkable for the father,
) i' d k# O; B- _who was diagnosed with hypothyroidism at age 16,# U- E5 M+ B# J# e0 A4 ^$ }6 z
which was treated with thyroxine. The father’s0 y9 s. N+ [/ L# c- e4 e9 q5 G
height was 6 feet, and he went through a somewhat
! `" U1 {+ D( B3 U. g0 \" gearly puberty and had stopped growing by age 14.( H4 H2 ~; F* T. W
The father denied taking any other medication. The
6 P2 f5 Q) }: k# R- _) x5 wchild’s mother was in good health. Her menarche
6 L% Q3 e' {% _) G' e V# a: \8 ~was at 11 years of age, and her height was at 5 feet
! x+ n* s( e5 R( Z5 inches. There was no other family history of pre-3 N& R8 x |& \) A' y! f
cocious sexual development in the first-degree rela-3 W; L3 ?$ m- I! b3 K, ]& e9 G6 J
tives. There were no siblings.
U8 o& R9 w* T# D' UPhysical Examination" u+ A0 \7 k/ Q" c8 x6 ^
The physical examination revealed a very active,
' S" y% C( [* }& D6 D# X5 Iplayful, and healthy boy. The vital signs documented9 u3 x6 ~( R$ D) c7 w
a blood pressure of 85/50 mm Hg, his length was) |" T( I7 |! d& K
90 cm (>97th percentile), and his weight was 14.4 kg1 f/ ]# F$ J* r
(also >97th percentile). The observed yearly growth
E& C" E# {' B) P! o" evelocity was 30 cm (12 inches). The examination of) q* F. P: k- D1 E( s0 V& K6 y
the neck revealed no thyroid enlargement.9 A" v; s5 {- z b, ^8 F
The genitourinary examination was remarkable for
+ s4 }" v0 R. ?* @+ ?" m% Denlargement of the penis, with a stretched length of) H7 a2 \- }5 I* c/ ?& P3 O/ ^/ N
8 cm and a width of 2 cm. The glans penis was very well3 j4 p; c' A( ]/ v
developed. The pubic hair was Tanner II, mostly around
( l, F9 u) m/ I( f! P! ~540& ]6 l, B, W' C' I6 f
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from: t$ i$ L" j( {4 G8 V
the base of the phallus and was dark and curled. The$ N& k6 k; M. R
testicular volume was prepubertal at 2 mL each. }, x. o! L. e- k& r! ]( t
The skin was moist and smooth and somewhat
4 Q+ |4 Z0 g, p9 yoily. No axillary hair was noted. There were no# g9 J$ ^5 q6 @& J5 x5 w9 X
abnormal skin pigmentations or café-au-lait spots.
- u5 ?6 {. U3 nNeurologic evaluation showed deep tendon reflex 2+* j# R" y' t# M0 Q
bilateral and symmetrical. There was no suggestion
) _; M- A4 h8 F# B+ m0 t& Q. G5 e O7 yof papilledema.
2 c- i* y6 y, p9 zLaboratory Evaluation
1 v( b' P, M8 |3 XThe bone age was consistent with 28 months by
) `7 C$ p; i0 L- M+ Z0 \* n9 |using the standard of Greulich and Pyle at a chrono-
* ~4 V$ S* a5 Q: C0 _logic age of 16 months (advanced).5 Chromosomal
/ H) H* V0 h; N3 D- Nkaryotype was 46XY. The thyroid function test
, o1 ^, ]% R4 i) ^) Xshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
3 b* _! p, O; Z9 q! xlating hormone level was 1.3 µIU/mL (both normal).
0 m# Q! ]# z% j3 ]( f* Y7 o) FThe concentrations of serum electrolytes, blood4 |! A. l6 ]- t j+ J' A
urea nitrogen, creatinine, and calcium all were! [5 x- h+ M2 M- S) P5 Y& b; A
within normal range for his age. The concentration K7 [3 x0 [. `% [9 h5 O
of serum 17-hydroxyprogesterone was 16 ng/dL$ N9 } i: }2 r
(normal, 3 to 90 ng/dL), androstenedione was 20
- b* o- P7 n( k- ]6 x" e0 Nng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
" D% H# x. g6 E0 C' g, tterone was 38 ng/dL (normal, 50 to 760 ng/dL),* w, C7 Z5 I! x
desoxycorticosterone was 4.3 ng/dL (normal, 7 to7 ^9 A8 i% B+ W, E# ~ X( C
49ng/dL), 11-desoxycortisol (specific compound S)( V+ O/ O7 C: G" U
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
& \: G9 b# P+ Z: o# L) S! Otisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
8 r+ A7 J9 Q. Ctestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
- ]+ Z5 J! B+ h* ^+ `9 oand β-human chorionic gonadotropin was less than
2 X: k8 U4 C* @& X4 _. V5 mIU/mL (normal <5 mIU/mL). Serum follicular5 y6 k/ z6 o: Y3 _( N
stimulating hormone and leuteinizing hormone
& W8 R2 @% k) Y' ^* A: x: N& yconcentrations were less than 0.05 mIU/mL! w5 x" z, M: o, P2 y1 v$ T
(prepubertal).6 N. _ j4 [1 ?* X
The parents were notified about the laboratory
& I( D6 c6 p" vresults and were informed that all of the tests were
& r( Q- i3 x. f" ynormal except the testosterone level was high. The
/ E0 S' ]$ z5 l mfollow-up visit was arranged within a few weeks to
! M# C1 N- D, J4 y- Q Fobtain testicular and abdominal sonograms; how-
: H% ~: @/ [" m# Yever, the family did not return for 4 months.
+ w3 {& t* z% R, U5 c+ JPhysical examination at this time revealed that the C6 f/ E: Q9 E9 }: v6 `
child had grown 2.5 cm in 4 months and had gained
; q7 L5 y7 d! S$ _0 v2 kg of weight. Physical examination remained& Q/ j6 e; t, K" j' x( Y
unchanged. Surprisingly, the pubic hair almost com-
% a, b' ] a9 ]- p9 n& v7 g) Zpletely disappeared except for a few vellous hairs at# Z4 _: w1 ]: V
the base of the phallus. Testicular volume was still 2
/ u& P7 @+ y4 b9 R' N% ~mL, and the size of the penis remained unchanged.& I% U: ^( w! @+ D/ C9 k( F
The mother also said that the boy was no longer hav-
% X# Q* w, N* V- _ing frequent erections.
3 U& P- C: @" y5 ZBoth parents were again questioned about use of
3 v5 t, i; G; C2 u0 U+ a8 @any ointment/creams that they may have applied to
" k5 X2 x2 y1 B' m4 b2 @" dthe child’s skin. This time the father admitted the
1 Z' |/ ^+ A: w2 ?% X2 C0 fTopical Testosterone Exposure / Bhowmick et al 541
* U' I3 I6 u f Quse of testosterone gel twice daily that he was apply-( E7 O6 q1 [5 I" W7 ?, }
ing over his own shoulders, chest, and back area for
. C! R3 H( G2 d- X g; }9 `a year. The father also revealed he was embarrassed7 p* k: L: ~0 P2 k% J$ a3 O
to disclose that he was using a testosterone gel pre-$ _% Y3 Y+ T( i4 a
scribed by his family physician for decreased libido
. o) D/ V, @: B/ e/ o/ S4 }secondary to depression.* K0 {% g. w7 [7 l2 P+ A1 |
The child slept in the same bed with parents., ~6 d2 A) d2 A( g* [! j
The father would hug the baby and hold him on his9 i/ `; {" ~0 R ~
chest for a considerable period of time, causing sig-( f* t# }! w$ ^1 H: N8 {+ v
nificant bare skin contact between baby and father., u: d9 f7 l' |0 f# j; D- P) G' \
The father also admitted that after the phone call,. b, x& p3 P4 x/ z/ y
when he learned the testosterone level in the baby
/ o' [$ [- O: Y( I: J! nwas high, he then read the product information& [7 `1 V6 M* F/ m8 U7 M
packet and concluded that it was most likely the rea-
: e; M% a+ g" e- fson for the child’s virilization. At that time, they4 D, J! M3 ?( e' a
decided to put the baby in a separate bed, and the/ C$ A* p# r. }" |$ T+ n. f* |8 Z4 {
father was not hugging him with bare skin and had
) V) h$ r6 x F2 _been using protective clothing. A repeat testosterone2 P1 E, q" p, ^
test was ordered, but the family did not go to the
& W; y; G& T& ^2 ]laboratory to obtain the test.2 I9 V" p) o6 U; G, R: ]7 W
Discussion% r$ @2 }. p8 m$ L) s# Q; e# Y+ N
Precocious puberty in boys is defined as secondary" h$ w/ V3 p. U% U
sexual development before 9 years of age.1,4
. w9 j: P: r! `4 N5 g. tPrecocious puberty is termed as central (true) when
- V# b+ p7 C% E/ eit is caused by the premature activation of hypo-
9 V& C3 \; Y7 `thalamic pituitary gonadal axis. CPP is more com-* _2 x$ x8 Q1 S' _
mon in girls than in boys.1,3 Most boys with CPP u8 `: S8 M$ L0 ]9 Z. Z' f4 i
may have a central nervous system lesion that is" B7 \4 N- s3 }( k- F J
responsible for the early activation of the hypothal-/ n P! I; r K6 A, r8 X
amic pituitary gonadal axis.1-3 Thus, greater empha-
: e5 z o7 v9 h- ysis has been given to neuroradiologic imaging in% ] e3 K' @+ ^- S# r# i2 J
boys with precocious puberty. In addition to viril-9 F0 s! q3 y) ~% Q( @" H/ Q
ization, the clinical hallmark of CPP is the symmet-
2 w4 D# h! F; `5 n* Z* N3 |, j& brical testicular growth secondary to stimulation by0 a1 u2 f, c) i9 z C! {6 k$ `; t
gonadotropins.1,3# L) S" A; {. g! R# y' Z# T% y1 E
Gonadotropin-independent peripheral preco-6 @4 \+ o2 m& S
cious puberty in boys also results from inappropriate' W+ ~% Z1 K# @ G; Q! M7 l. k: }
androgenic stimulation from either endogenous or
0 n0 [/ S' \/ \ y7 nexogenous sources, nonpituitary gonadotropin stim- N ?; }2 o6 x% l6 e5 ~
ulation, and rare activating mutations.3 Virilizing
3 c& j/ X( B# P% ?. kcongenital adrenal hyperplasia producing excessive
# L7 G G- u! s" e# Cadrenal androgens is a common cause of precocious
4 P1 N6 H8 @, d/ c vpuberty in boys.3,48 t$ h* b3 L. K! q! z
The most common form of congenital adrenal
$ d& M& \8 l- ?5 ghyperplasia is the 21-hydroxylase enzyme deficiency.; h. z% k& i- Q) X, Z% v9 x+ q
The 11-β hydroxylase deficiency may also result in
/ H5 H( H% E; E9 Zexcessive adrenal androgen production, and rarely,4 c1 {) V- ~" q8 V1 [+ c
an adrenal tumor may also cause adrenal androgen
0 \0 P0 l/ }' ^1 Z7 Lexcess.1,3$ E0 p# Z1 e4 j: h9 @4 x, j
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
' m9 n+ R' h7 N+ ]7 o: a542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
3 z$ e& ~! V: \2 h& W4 z7 EA unique entity of male-limited gonadotropin-
; J4 D0 s1 }2 w. m+ O, yindependent precocious puberty, which is also known
8 M+ g2 r( z* U/ P- ras testotoxicosis, may cause precocious puberty at a
$ i' x d. O/ n7 n, l o) ^5 `very young age. The physical findings in these boys) Y2 y0 K) c" h+ e k
with this disorder are full pubertal development,5 i% N6 u9 [ T) M& \, F
including bilateral testicular growth, similar to boys
3 C6 {$ v3 m+ O1 h. Rwith CPP. The gonadotropin levels in this disorder
, F( Y g* n9 G4 Z; y# q% M* Kare suppressed to prepubertal levels and do not show
( W% G! ^1 @: Ypubertal response of gonadotropin after gonadotropin-
+ R+ Z& x, a$ m8 V) e( c5 Y& u, h& [releasing hormone stimulation. This is a sex-linked
. J# R1 Y7 r% v% A: T+ lautosomal dominant disorder that affects only
# b& ?) H8 x8 P {4 ?' q' Zmales; therefore, other male members of the family
2 L# O) N T3 U5 T. Imay have similar precocious puberty.3
! Q `( T% K4 A$ TIn our patient, physical examination was incon-
9 C9 G! z5 ~" f5 ]sistent with true precocious puberty since his testi-1 }% j1 K' k" `+ a) Z! z
cles were prepubertal in size. However, testotoxicosis; I% Z2 ]" e2 u; C7 d
was in the differential diagnosis because his father
- Q' h7 s7 w! n- istarted puberty somewhat early, and occasionally,9 E/ M; ?6 n9 Z4 ~3 y- c
testicular enlargement is not that evident in the; ^/ w8 r( y9 N& z* r
beginning of this process.1 In the absence of a neg-# |9 L! k y3 e: t" C
ative initial history of androgen exposure, our! f6 g* n& I4 W% e( z7 v' z8 Y, }
biggest concern was virilizing adrenal hyperplasia,
) n, P2 C5 @8 Q1 Neither 21-hydroxylase deficiency or 11-β hydroxylase
+ u+ S/ U2 W$ |2 T S! l4 G& ]deficiency. Those diagnoses were excluded by find-4 h0 m* W# L/ V3 `5 ~) w i
ing the normal level of adrenal steroids.# a% l% t8 x3 M9 D, A3 W# \2 [
The diagnosis of exogenous androgens was strongly( K7 c8 i3 p! Y
suspected in a follow-up visit after 4 months because' s4 Z0 L7 j9 F. D+ b( U
the physical examination revealed the complete disap-
& K( [' Q) v; e, s0 ipearance of pubic hair, normal growth velocity, and
) B2 t* h; s8 B2 r1 J+ Ddecreased erections. The father admitted using a testos-
1 }- ]. _1 ] A5 X% Yterone gel, which he concealed at first visit. He was* P7 `& Y$ o, ]/ Y; V' J! A
using it rather frequently, twice a day. The Physicians’
& ?2 i1 C9 s7 wDesk Reference, or package insert of this product, gel or) a" ^* k0 b6 n' o* }
cream, cautions about dermal testosterone transfer to5 e6 x R' ~" g# Q" d0 ~4 d2 i
unprotected females through direct skin exposure.: _- M) I. k9 K+ g
Serum testosterone level was found to be 2 times the
" j6 w1 B' P% ~! ~/ u0 w3 A6 Abaseline value in those females who were exposed to
' v$ s" z% x) z- Seven 15 minutes of direct skin contact with their male M$ J; S9 K( q/ ~$ M
partners.6 However, when a shirt covered the applica-6 x$ h2 b4 S! u1 w7 y% T
tion site, this testosterone transfer was prevented.0 {8 C' N$ J9 E, i, y* |+ R
Our patient’s testosterone level was 60 ng/mL,# m$ D% n% u: {
which was clearly high. Some studies suggest that
3 I7 c6 M" c, }) Y+ Ldermal conversion of testosterone to dihydrotestos-
& d/ L6 I2 c' B3 ^ O% Cterone, which is a more potent metabolite, is more
* J; X- U( r$ sactive in young children exposed to testosterone
! t) v N% q) x2 w; G4 y( j) Bexogenously7; however, we did not measure a dihy-2 O( U C ?( e% X4 n
drotestosterone level in our patient. In addition to5 y# ^1 ?. `# Z7 J1 F" b$ ^
virilization, exposure to exogenous testosterone in/ P [1 d4 G/ I, o
children results in an increase in growth velocity and6 V& ~2 {' ^! o) W# S4 V
advanced bone age, as seen in our patient.7 u0 l! }1 S: A+ f w2 O* O4 ~9 h) X
The long-term effect of androgen exposure during
+ X8 }/ h* o# m1 J q( f+ Iearly childhood on pubertal development and final
# U1 O6 a9 [" c" X! jadult height are not fully known and always remain8 k% e. b) {& P: a4 k
a concern. Children treated with short-term testos-9 _. R9 S+ a+ b( C4 [' m
terone injection or topical androgen may exhibit some( r" e( U* r! i
acceleration of the skeletal maturation; however, after( j! F# U1 w% l- X( l
cessation of treatment, the rate of bone maturation Y- F a2 _. `: }* {, d
decelerates and gradually returns to normal.8,93 o8 X6 z1 X D0 D; F
There are conflicting reports and controversy
+ d4 c; b" ^6 \: R5 t% b7 X$ tover the effect of early androgen exposure on adult
. \0 t( r: |9 T5 C( V# lpenile length.10,11 Some reports suggest subnormal$ d7 {% d% g _# W1 q
adult penile length, apparently because of downreg-# m4 m0 h P/ u
ulation of androgen receptor number.10,12 However,( y6 }0 x$ u% u0 {7 @# S# q
Sutherland et al13 did not find a correlation between
5 g: b0 t) x0 ~* M: J* j$ u- j" jchildhood testosterone exposure and reduced adult) A% [! \# h, |( a; c
penile length in clinical studies.+ w! }- y; S+ l2 ?. U; g
Nonetheless, we do not believe our patient is
, _5 I; }& ]4 W! Z, `' mgoing to experience any of the untoward effects from8 F0 k2 T: D) Q# d) e7 x" c
testosterone exposure as mentioned earlier because
9 C; s2 N9 j" }. e+ Kthe exposure was not for a prolonged period of time., S" s% }! c" R7 A2 Q# K/ D
Although the bone age was advanced at the time of* _ c/ I# W# y! G' R- k3 G
diagnosis, the child had a normal growth velocity at( V+ b9 e0 G+ q$ Z* Z: ^
the follow-up visit. It is hoped that his final adult
6 H; r$ S# h1 n. T. H) x; H$ f6 Pheight will not be affected.
5 h4 U) G( P" W7 HAlthough rarely reported, the widespread avail-
3 c; C! Q" l9 e) k; D, @1 Q ^6 Wability of androgen products in our society may4 q) J! m- E2 i
indeed cause more virilization in male or female4 s6 w" {+ B) ~& }
children than one would realize. Exposure to andro-
' r' ~% q7 A, q/ K6 R/ Ugen products must be considered and specific ques-
' j. D; p9 |# ]$ q+ e: Utioning about the use of a testosterone product or
3 C# p; T& j* g3 ^9 c+ U! {7 ~gel should be asked of the family members during5 ?0 G3 r& f( t, l) m" o
the evaluation of any children who present with vir-- B3 Y1 T$ Z* b& o
ilization or peripheral precocious puberty. The diag-( ^, _5 E1 v$ @" t% ]: _
nosis can be established by just a few tests and by% d- V _9 Q; ^; k9 O' |# z7 Z3 ?
appropriate history. The inability to obtain such a
2 Z+ w3 I0 d4 o: Whistory, or failure to ask the specific questions, may
$ e8 h, G) }6 }/ Eresult in extensive, unnecessary, and expensive" K% j' F$ M4 E/ V3 k
investigation. The primary care physician should be" J' z" v L& L8 j6 F; u: y
aware of this fact, because most of these children
. g+ y5 U; R! Z" ~may initially present in their practice. The Physicians’3 @# [ j8 o/ J/ }: U7 N
Desk Reference and package insert should also put a; S# ^$ V4 ]) N0 Z0 ?' u
warning about the virilizing effect on a male or
' o) a2 I7 R5 A5 ofemale child who might come in contact with some-
: i5 `9 b1 c. a1 W' ?( }one using any of these products.
$ n ^, J6 G Z: d9 ~! _References$ O" ~# S1 y# Z. R9 D0 A+ J7 J
1. Styne DM. The testes: disorder of sexual differentiation
" J1 w6 L6 `- S2 y xand puberty in the male. In: Sperling MA, ed. Pediatric* T. Z3 ~9 w/ U
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;* @+ u( Z1 B& h0 d% H {; G
2002: 565-628.$ Q9 y- R2 @9 h& u: I& u# g
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious# S$ [" t/ \* g% x
puberty in children with tumours of the suprasellar pineal
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5 `# @. v1 ^( F% \/ Nareas: organic central precocious puberty. Acta Paediatr. o; k+ W& \6 }4 p! b/ X% d
2001;90:751-756.' s; A V" W x+ e
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.5 L$ @- a- I$ T& N" s3 L
Pediatric Endocrinology. 4th ed. New York, NY: Marcel. ]( v' w1 M1 h* w2 A; ~ z
Dekker Inc; 2003:211-238.4 @: o& D0 o5 D1 [1 o
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
+ c/ u/ U2 W# y6 Bdevelopment in a two-year-old boy induced by topical+ r. F# E) s! s
exposure to testosterone. Pediatrics. 1999;104:e23.
; a+ ?/ k& V4 g1 g( j5. Greulich WW, Pyle SI, eds. Radiographic Atlas of" D# \: S( b( I6 Q; k
Skeletal Development of the Hand and Wrist. 2nd ed.9 m [( w+ G9 J% r2 M) D
Stanford, CA: Stanford University Press; 1959.
& f3 I e- Y% g- o6. Physicians’ Desk Reference. Androgel 1% testosterone,/ ]7 W! c. M0 q1 Z' f0 ~; T4 l, o* \
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
- H- Q2 P: u4 JEconomics Company, Inc; 2004:3239-3241.
; X3 f6 R# H& z1 ~$ s' \( a6 R9 ~7. Klugo RC, Cerny JC. Response of micropenis to topical
" M9 |% B' r+ Ltestosterone and gonadotropin. J Urol. 1978;119:
' I! F$ j* Z3 M/ z- p% |/ K667-668.
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