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is a significant concern for physicians. Central
8 t% ]0 _# G- H3 o8 Y5 L% A: c6 Hprecocious puberty (CPP), which is mediated1 L8 S5 `6 m! ?9 l; Q$ M
through the hypothalamic pituitary gonadal axis, has
9 k! n! @8 p4 m, Ca higher incidence of organic central nervous system
. K) G1 I+ ?* A* m" Y" Z* X: }9 K1 rlesions in boys.1,2 Virilization in boys, as manifested
" j# q% f8 ^6 ~ q$ i8 iby enlargement of the penis, development of pubic
, j! o: {; {( q3 Thair, and facial acne without enlargement of testi-/ X# m1 D' m7 B# d; z& B
cles, suggests peripheral or pseudopuberty.1-3 We4 F: Y" t$ c2 J
report a 16-month-old boy who presented with the% y. b# {& E2 @) U+ H& ~
enlargement of the phallus and pubic hair develop-
; B. d. ^0 ?/ i1 ]/ m) d lment without testicular enlargement, which was due
) k$ E% l8 P. _, x1 y: b8 ato the unintentional exposure to androgen gel used by
& [1 I+ B0 a* E7 D3 L1 T! q: Xthe father. The family initially concealed this infor-
+ {3 b4 {# C! ^& _. z- Emation, resulting in an extensive work-up for this
/ U8 X% U. c! ?& @ ochild. Given the widespread and easy availability of7 j& D: U6 E3 b% {# a6 Q/ Z# l
testosterone gel and cream, we believe this is proba-+ j+ j9 H, ?) V% J% y: w$ k: m
bly more common than the rare case report in the n @; M8 n! x
literature.40 U8 R! m2 A& L6 C
Patient Report. A( j* S( ~9 R
A 16-month-old white child was referred to the
! `3 ~ d9 s sendocrine clinic by his pediatrician with the concern- H" r W8 }6 `
of early sexual development. His mother noticed
& r1 A) Y, S& b% p% e0 f# glight colored pubic hair development when he was0 c, F9 B) C8 f7 T& m: E* u8 y) E
From the 1Division of Pediatric Endocrinology, 2University of: Y( Z) j" b- }9 M# ~, }; y% z
South Alabama Medical Center, Mobile, Alabama.& p' R# u5 _* V N$ ]! ~; c' U1 e9 t6 o
Address correspondence to: Samar K. Bhowmick, MD, FACE,
+ [% n9 s- n. M _$ I6 ~ \Professor of Pediatrics, University of South Alabama, College of. {2 E1 T" `* z
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;( k6 K; ]5 m9 o% b9 i( o6 H
e-mail: [email protected].0 E/ e7 Q2 H! r$ V0 n8 u1 [
about 6 to 7 months old, which progressively became. Z* f. Q& r1 }' @ F% r
darker. She was also concerned about the enlarge-
9 f) o6 [ u5 _- yment of his penis and frequent erections. The child8 q2 _* D/ a% c% i! T! V3 s
was the product of a full-term normal delivery, with' O% a9 R9 \) I9 X. y
a birth weight of 7 lb 14 oz, and birth length of
' y. ~; P/ {" b, r3 s# Q20 inches. He was breast-fed throughout the first year
) N4 a, [6 M9 Qof life and was still receiving breast milk along with
) _. v* W+ n1 q, t6 p; w0 Isolid food. He had no hospitalizations or surgery,
% [$ {- }8 s2 B6 r! Y- Nand his psychosocial and psychomotor development
8 P. b: k7 o$ X" k2 r5 h$ w7 Iwas age appropriate.: t. z) N% @ D; A
The family history was remarkable for the father,
; F+ D0 H9 d1 I0 O7 v$ |& c5 fwho was diagnosed with hypothyroidism at age 16,
# P, [% X8 k' J* V4 ^which was treated with thyroxine. The father’s
$ o: l% g8 T- I$ k( Y6 U" Wheight was 6 feet, and he went through a somewhat
6 w9 W! [9 Z2 r' o) Aearly puberty and had stopped growing by age 14.
! z4 g# S n |+ IThe father denied taking any other medication. The1 P1 Z3 ?4 S1 w3 S+ Y6 C8 k1 p
child’s mother was in good health. Her menarche9 i2 s( p2 ]- @4 _; P
was at 11 years of age, and her height was at 5 feet. F4 M+ H* C' R3 }9 s$ D3 ?
5 inches. There was no other family history of pre-2 ^ P2 d$ x' z" ]: G
cocious sexual development in the first-degree rela-: j8 V& R. B0 d. g5 M$ h
tives. There were no siblings.
/ U- X% t( V9 P) H- YPhysical Examination+ o$ k" X" K+ z" A
The physical examination revealed a very active,) h8 Z) V* Y5 ~0 p
playful, and healthy boy. The vital signs documented: X3 N5 y W2 h% u
a blood pressure of 85/50 mm Hg, his length was
; ?: [$ Q, S( G90 cm (>97th percentile), and his weight was 14.4 kg
/ ^2 o+ ^# f, x6 \7 x(also >97th percentile). The observed yearly growth: b! T3 u1 [$ `8 [( j
velocity was 30 cm (12 inches). The examination of$ |0 q% u& |- P5 H, K! R5 U
the neck revealed no thyroid enlargement.* h+ ]9 ^7 a5 o' {8 X7 v# e$ W
The genitourinary examination was remarkable for
: G8 x" e% U8 Z: \( g3 p$ ~enlargement of the penis, with a stretched length of
4 j3 V2 v3 p2 D m8 cm and a width of 2 cm. The glans penis was very well
; N# ^3 P! b& L9 z$ T/ l$ n# ]developed. The pubic hair was Tanner II, mostly around
, T: X# N p/ A/ f1 d i3 W5404 W8 x7 `2 E, W
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
7 O1 L2 h$ J2 K$ athe base of the phallus and was dark and curled. The
" u0 \, l) B7 c# Utesticular volume was prepubertal at 2 mL each.
* P4 }4 Y6 p1 g* Q5 g2 j' FThe skin was moist and smooth and somewhat
1 k# y7 d4 |5 ]: \: Xoily. No axillary hair was noted. There were no( r6 k7 I: O. }8 l2 p( D# V1 w* v
abnormal skin pigmentations or café-au-lait spots.: X# _2 p" i7 s( {' O" K9 j9 m
Neurologic evaluation showed deep tendon reflex 2+- z2 k. O6 S* n( s4 @1 D5 G" r
bilateral and symmetrical. There was no suggestion! g. z' y+ R' i) V4 h
of papilledema.
2 _3 Y! U0 J+ S( mLaboratory Evaluation
$ k& J# r# q4 K# ]. h! SThe bone age was consistent with 28 months by
& ]& h& H2 J7 X# i& qusing the standard of Greulich and Pyle at a chrono-
% P) l2 m2 B1 ^8 q; T' Ulogic age of 16 months (advanced).5 Chromosomal9 n$ r9 ]+ @7 ]$ x; ?
karyotype was 46XY. The thyroid function test1 p9 U& N& ~' i+ }& @4 N* b
showed a free T4 of 1.69 ng/dL, and thyroid stimu-+ u- q, }$ n. r3 ]& W0 j$ X
lating hormone level was 1.3 µIU/mL (both normal)., ~8 V) F5 S j& U! @+ K' B2 ^
The concentrations of serum electrolytes, blood, `' J1 k" W, l- C3 W0 i+ }" p& I7 p
urea nitrogen, creatinine, and calcium all were
5 ^) m* g) M/ @/ J5 W2 Iwithin normal range for his age. The concentration
# k0 Y& t6 ^# m" Eof serum 17-hydroxyprogesterone was 16 ng/dL+ ?/ u* |( `. ^+ B4 {& t& H( f
(normal, 3 to 90 ng/dL), androstenedione was 20* S* c7 W/ t% Y- Q+ u
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-; S# k) h5 j6 y/ c: H
terone was 38 ng/dL (normal, 50 to 760 ng/dL),7 G) h9 k+ b+ f6 v, ~& ]
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
. K: |* k# e3 v2 A2 p, s C49ng/dL), 11-desoxycortisol (specific compound S)5 J7 Y0 [+ {+ T/ c; F
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-. H# w+ H! Y# I" |! d' v* N% I
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total5 m) V6 n5 {, V9 @7 D
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
( A1 Q) T& A) J& A9 F9 nand β-human chorionic gonadotropin was less than
* w- D" j- [1 G- V [ O0 T5 mIU/mL (normal <5 mIU/mL). Serum follicular/ Z7 {; H2 t9 A$ ?
stimulating hormone and leuteinizing hormone
. r: x3 x; s; econcentrations were less than 0.05 mIU/mL2 }& c3 O1 [) k: N. r2 x
(prepubertal).2 b; n# s/ |, y) m
The parents were notified about the laboratory( x6 v4 x& s9 V x& n, z" {! ^
results and were informed that all of the tests were
" E0 M+ R' M7 |0 unormal except the testosterone level was high. The
" o0 X/ H6 u! ]% {2 \follow-up visit was arranged within a few weeks to. h" \! F! \7 B9 Q3 q" B1 ^3 i- C- `
obtain testicular and abdominal sonograms; how-
0 U1 [0 z. M5 _ever, the family did not return for 4 months.
0 P. q7 i/ P5 y& @6 o* s) h3 OPhysical examination at this time revealed that the: g- p. w+ K/ c# c. }
child had grown 2.5 cm in 4 months and had gained
3 ^2 v7 u2 v1 g! s2 kg of weight. Physical examination remained
6 h" t+ K# J6 w' dunchanged. Surprisingly, the pubic hair almost com-
5 B v8 | p0 S- u6 W& f; epletely disappeared except for a few vellous hairs at) @1 N3 C* r, @1 @# N6 h
the base of the phallus. Testicular volume was still 24 Z1 V) ^4 v2 E+ H
mL, and the size of the penis remained unchanged.1 C: u" z% Q' c3 u1 l
The mother also said that the boy was no longer hav-9 S+ b0 o% r4 u5 S5 T) R
ing frequent erections.
! j e* u0 K, g: G8 v6 qBoth parents were again questioned about use of
9 {- n. B6 b$ n8 h! ]1 nany ointment/creams that they may have applied to
$ R# z8 s/ y, _/ i* t2 b8 O6 F# Dthe child’s skin. This time the father admitted the. g* q$ I$ k4 s
Topical Testosterone Exposure / Bhowmick et al 541* v2 u* l2 x S. D1 ` f
use of testosterone gel twice daily that he was apply-
) V2 v. o$ w4 e* e. E: e5 L. ving over his own shoulders, chest, and back area for
7 N$ F+ Y% o" `- _a year. The father also revealed he was embarrassed
" m: x7 s. ]# N6 p) H/ ~to disclose that he was using a testosterone gel pre-, X/ W4 z6 p3 J- D, C. i, [
scribed by his family physician for decreased libido+ ^9 V% w! K/ l; A% J/ h" s& G
secondary to depression.
0 A4 @' K @9 B% p4 W, n7 e# ~, DThe child slept in the same bed with parents." l0 U" C5 [$ H' Y d
The father would hug the baby and hold him on his
0 z: s! f/ c1 y# F* }/ X$ Bchest for a considerable period of time, causing sig-( \7 B# U) ?7 @
nificant bare skin contact between baby and father.
9 t5 \0 v/ E& A5 p: b0 |4 o$ hThe father also admitted that after the phone call,
X' i) b1 ?0 n# ?when he learned the testosterone level in the baby4 \9 C2 [: [; @
was high, he then read the product information
9 A. J! X, e: ^! r2 h/ a; g0 Q% Epacket and concluded that it was most likely the rea-
* N+ k( C& h/ k( f3 Fson for the child’s virilization. At that time, they
- g2 e% Q# `5 Q# w5 bdecided to put the baby in a separate bed, and the$ h* } A, e7 m: x) l
father was not hugging him with bare skin and had* ?" |' k" V& D* S
been using protective clothing. A repeat testosterone% \# H- D' Z* z: T
test was ordered, but the family did not go to the: G6 o, @9 H2 ~; |4 ~
laboratory to obtain the test.
/ e: U" F- ?* o( ?Discussion
& R4 l+ `) B$ j- a$ FPrecocious puberty in boys is defined as secondary
; @6 M! G7 g% n$ H" I" Rsexual development before 9 years of age.1,4' o. I6 \ t! ]9 X$ j, _2 }$ E
Precocious puberty is termed as central (true) when
* }4 ]! h3 i' U' C" a2 H0 Z5 p9 P, Mit is caused by the premature activation of hypo-! s3 u0 Y" j: n2 x% H
thalamic pituitary gonadal axis. CPP is more com-
4 g. m( t2 \# k6 x, qmon in girls than in boys.1,3 Most boys with CPP2 W- v: a" [+ l/ @. A& Z( h
may have a central nervous system lesion that is( k O/ j4 N& R& w" ?
responsible for the early activation of the hypothal-
4 l* I* x3 s- q; d( u/ g ~' ]amic pituitary gonadal axis.1-3 Thus, greater empha- P W! _* h3 K' G
sis has been given to neuroradiologic imaging in8 N& p% F) J; A, v3 G5 b
boys with precocious puberty. In addition to viril-
, ~: Z- u6 C1 Wization, the clinical hallmark of CPP is the symmet-9 T; N& W/ ?8 E
rical testicular growth secondary to stimulation by
' c# y; ~6 j) J2 |* e1 @gonadotropins.1,3) k* e$ v! l' h; q
Gonadotropin-independent peripheral preco-/ L" L" v7 @2 t3 t( |% X
cious puberty in boys also results from inappropriate. F/ G5 a% V! X# J* K8 b
androgenic stimulation from either endogenous or
2 v( v L# }" Xexogenous sources, nonpituitary gonadotropin stim-+ t1 T. p' z, d, w
ulation, and rare activating mutations.3 Virilizing, `5 ^) _5 C" k$ S8 L
congenital adrenal hyperplasia producing excessive
! {7 u# l& `1 |0 c( Aadrenal androgens is a common cause of precocious
& A- V& s5 B( _( I5 Z* Upuberty in boys.3,42 Y( z# Q2 i8 T5 o
The most common form of congenital adrenal) [ x2 O/ Q$ H; n; d0 [; z
hyperplasia is the 21-hydroxylase enzyme deficiency.
( M% R; c7 c3 Y% Z) bThe 11-β hydroxylase deficiency may also result in
7 _. r7 x: y( Pexcessive adrenal androgen production, and rarely,& Z1 _" E+ e- A& X
an adrenal tumor may also cause adrenal androgen
$ u$ \# f4 h! N: I* N( q2 {excess.1,3
' D; O3 M6 S9 s0 U) gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ I; ^' B) g& v, K; }6 _7 ~& [542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
7 b& ?0 c o4 I. f1 ?3 fA unique entity of male-limited gonadotropin-! i7 N! U& M+ n4 `- F9 _
independent precocious puberty, which is also known# m& e0 ?; Z# u- A8 X% n! c
as testotoxicosis, may cause precocious puberty at a
9 T- h4 Z( c+ r( x7 Overy young age. The physical findings in these boys. h+ w! a" @2 C. J" y w
with this disorder are full pubertal development,
6 F# P8 ~+ H0 q5 `. _! E3 q9 Qincluding bilateral testicular growth, similar to boys/ O+ E( D( o$ l+ y$ Y% R6 k4 {" y$ U
with CPP. The gonadotropin levels in this disorder
[6 P e) K, H: t) Aare suppressed to prepubertal levels and do not show
; x( ?) p/ f; \- z* fpubertal response of gonadotropin after gonadotropin-3 s% s F; B1 h% T
releasing hormone stimulation. This is a sex-linked! |' ?, o: ~ ]( X
autosomal dominant disorder that affects only0 C0 G4 R# t. V2 x8 X
males; therefore, other male members of the family1 R4 n5 D' H, J' ]& c
may have similar precocious puberty.3
( [" S1 D* l$ C5 S1 q: {3 AIn our patient, physical examination was incon-
% r1 q; E! C" m0 K! Vsistent with true precocious puberty since his testi-
9 [) z+ i, j2 _% \+ M8 u# L& ncles were prepubertal in size. However, testotoxicosis% Y) }, r: }2 S7 n3 o
was in the differential diagnosis because his father9 f/ {) T6 W. t
started puberty somewhat early, and occasionally,
. s( g* u/ V# @* gtesticular enlargement is not that evident in the
- `! r8 R! ^. N! {, xbeginning of this process.1 In the absence of a neg-
5 I$ C% y+ b6 X( d- M0 |) C+ Z' K/ \ative initial history of androgen exposure, our# A6 f/ m# r) n2 ]
biggest concern was virilizing adrenal hyperplasia,
q$ x1 Y( U9 `6 d( I E& i4 g" seither 21-hydroxylase deficiency or 11-β hydroxylase1 e3 ?, b5 d! H+ t
deficiency. Those diagnoses were excluded by find-$ r4 }1 V0 _" U8 O4 y
ing the normal level of adrenal steroids.
6 \& s5 o e1 ?. M2 qThe diagnosis of exogenous androgens was strongly
( g, s# ?1 i* e( D1 Nsuspected in a follow-up visit after 4 months because$ y! ~4 E B/ \0 S( }
the physical examination revealed the complete disap-& ~5 _: U/ H, _6 `1 n% B) ^2 j9 {7 U
pearance of pubic hair, normal growth velocity, and* r. H- S7 o4 \
decreased erections. The father admitted using a testos-
+ n$ G7 n8 I+ h# M+ ?+ V( e: Pterone gel, which he concealed at first visit. He was
0 t. t: n8 U6 \7 X" cusing it rather frequently, twice a day. The Physicians’* G1 O# q# J% {+ k' w7 @7 |
Desk Reference, or package insert of this product, gel or
9 s3 _0 P; ^1 I2 B3 ucream, cautions about dermal testosterone transfer to1 x% y J- X6 ~3 V
unprotected females through direct skin exposure.( l8 |& T* x i1 A% y7 q$ H% k
Serum testosterone level was found to be 2 times the3 K7 B. E X. j4 u9 E
baseline value in those females who were exposed to
* F5 k! ?; d7 y9 ~: ?even 15 minutes of direct skin contact with their male
, i$ \" n9 }& O% a: u6 qpartners.6 However, when a shirt covered the applica-' W6 T$ _6 I, k: v; x8 G# g) ?
tion site, this testosterone transfer was prevented., t+ H( ?: a9 v2 o
Our patient’s testosterone level was 60 ng/mL,
; P( z/ [3 Z- {' R+ twhich was clearly high. Some studies suggest that
T7 a9 I) g+ u& Y0 ]dermal conversion of testosterone to dihydrotestos-+ f* h4 K, Z* m( M
terone, which is a more potent metabolite, is more
4 O8 t# B# q+ A; N1 s$ {active in young children exposed to testosterone! f8 F+ V1 X4 Z5 N
exogenously7; however, we did not measure a dihy-! [$ N0 O9 k- {% U: M
drotestosterone level in our patient. In addition to
5 |# d* G! x: B8 ]1 n" }virilization, exposure to exogenous testosterone in& u# \' f% ^! l; s) T
children results in an increase in growth velocity and$ Y! i" I% e* S/ [( Z3 O
advanced bone age, as seen in our patient.* K9 A. A4 [) ^$ o. M8 B
The long-term effect of androgen exposure during3 a% P9 O$ }9 K* r9 V( v
early childhood on pubertal development and final
% A+ w, i2 r- r4 u% L3 @; l( {. g0 Cadult height are not fully known and always remain3 F, }$ {. L) K& z, ], j
a concern. Children treated with short-term testos-
* E* Q# T$ y% Bterone injection or topical androgen may exhibit some
7 J C4 b# Y" S: I; L5 uacceleration of the skeletal maturation; however, after$ J4 f% E4 O+ f2 g m6 }6 R
cessation of treatment, the rate of bone maturation0 q0 u U [. p1 p/ y2 T# `3 S
decelerates and gradually returns to normal.8,9$ n3 T) j* t/ R# V
There are conflicting reports and controversy
9 l7 ] V w. Z$ _& s, fover the effect of early androgen exposure on adult
/ C! O, c e+ O: O& cpenile length.10,11 Some reports suggest subnormal& e+ F3 ?' Y# M7 M
adult penile length, apparently because of downreg-
4 G1 }8 H. H# S; |. l) kulation of androgen receptor number.10,12 However,
* a# B7 Y. k* z0 z- c* q6 A6 ESutherland et al13 did not find a correlation between
; C3 B0 l; o; \childhood testosterone exposure and reduced adult
' D7 ]1 g- i7 J/ o N) t- lpenile length in clinical studies.
! q5 k* l' I. p' MNonetheless, we do not believe our patient is
* v8 b# `4 `: M6 T# mgoing to experience any of the untoward effects from/ P% s& E( {6 \( T0 ^' n3 l
testosterone exposure as mentioned earlier because) R0 F/ j1 U) [" q! V
the exposure was not for a prolonged period of time.
. G9 F. j* V* ] j3 U4 [+ R4 n3 xAlthough the bone age was advanced at the time of" D _. Z! V1 d1 [
diagnosis, the child had a normal growth velocity at
% W' O- g3 p1 z1 o! D7 }the follow-up visit. It is hoped that his final adult# O2 N; q( f8 P1 L" }/ c- ?
height will not be affected.
9 x/ P: Y5 f: u9 }( r3 B" a+ SAlthough rarely reported, the widespread avail-/ y8 d1 C1 \9 ?1 _( O
ability of androgen products in our society may
0 [3 t" x9 d: m+ q3 Aindeed cause more virilization in male or female/ X6 _& i/ A8 k
children than one would realize. Exposure to andro-
( g% G' \3 B' N3 lgen products must be considered and specific ques-
1 r" I) A5 j, i) utioning about the use of a testosterone product or
& V1 ^; Q% N5 }8 Tgel should be asked of the family members during
' C1 j+ b- G0 ?; [. e* Y6 L. F% zthe evaluation of any children who present with vir-
- Y- ^+ y6 k+ M: xilization or peripheral precocious puberty. The diag-! v# T- a% ~! q6 i0 A8 b: Z- W3 e
nosis can be established by just a few tests and by
# R3 U+ E; N% {9 z' g6 M) Gappropriate history. The inability to obtain such a
$ \- h0 [* y, p Xhistory, or failure to ask the specific questions, may' T3 W: I' y1 g& z9 e+ i
result in extensive, unnecessary, and expensive+ v3 T4 p0 d, N# Z; G8 B) |
investigation. The primary care physician should be
; t/ o" M% U/ {# oaware of this fact, because most of these children
! h5 B1 \$ L" D7 omay initially present in their practice. The Physicians’
; P1 \% K, E5 UDesk Reference and package insert should also put a
$ u3 K" t: j# A4 ?7 e% I" y4 \warning about the virilizing effect on a male or d3 p* _* q4 D) D
female child who might come in contact with some-
D7 d( Z7 h" _2 x4 s+ Q0 @" ]one using any of these products.
7 V' i+ T2 h0 S% T- A* zReferences* ~7 T; _6 i' F" c4 |, l
1. Styne DM. The testes: disorder of sexual differentiation
" y/ D4 g8 ?3 ?and puberty in the male. In: Sperling MA, ed. Pediatric
3 `- m, [4 B4 P! ]/ UEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
8 z. u9 ?+ z* B5 e2002: 565-628.
' R6 H4 B! N" S( N' a2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious" i* I: @& M8 N* |! ^
puberty in children with tumours of the suprasellar pineal
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Topical Testosterone Exposure / Bhowmick et al 5431 \* e) ^; M" X1 M8 c
areas: organic central precocious puberty. Acta Paediatr.1 Y% A( g4 a/ x0 ^% z D" d; F0 A
2001;90:751-756.' r* u3 s- ~; u( E
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.2 S: R, U {' u& R5 f" p! A
Pediatric Endocrinology. 4th ed. New York, NY: Marcel0 |" P9 ?+ f! G
Dekker Inc; 2003:211-238.' O: Z# Y& g1 i* {5 B0 I1 x7 e
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual: T) M& y6 w: I3 J
development in a two-year-old boy induced by topical
9 l* X- q# X9 j* p5 |/ A6 Sexposure to testosterone. Pediatrics. 1999;104:e23.
; A% Y/ L2 x y& N5. Greulich WW, Pyle SI, eds. Radiographic Atlas of* D9 @3 A( p9 u" Y- m
Skeletal Development of the Hand and Wrist. 2nd ed.
- g9 l: q0 R* P& Y. ?1 PStanford, CA: Stanford University Press; 1959.
0 {! W7 ?8 O+ w3 V6. Physicians’ Desk Reference. Androgel 1% testosterone,
' U1 r4 t6 `2 ?+ C7 [- nUnimed Pharmaceutical Inc. Montvale, NJ: Medical
8 i+ H# s+ w- i& @* _5 [0 NEconomics Company, Inc; 2004:3239-3241.8 q+ o" W% K( v$ h* q- O
7. Klugo RC, Cerny JC. Response of micropenis to topical" G; t! |7 @$ g; z, i; M
testosterone and gonadotropin. J Urol. 1978;119:; Y$ @: F7 P% U8 F0 l% T& ~
667-668.$ Y2 M0 r! D2 z# H" V
8. Guthrie RD, Smith DW, Graham CB. Testosterone
' \: e0 A' p6 p) F3 mtreatment for micropenis during early childhood. J Pediatr.- k9 t: | m. ^! K2 F: I
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