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is a significant concern for physicians. Central1 [7 B H# {& a* {( J* @+ s
precocious puberty (CPP), which is mediated" n( \4 k; p/ _# Z3 E
through the hypothalamic pituitary gonadal axis, has
# G9 [7 Z) w. r9 g4 K( H' ma higher incidence of organic central nervous system( d) C3 s# C. I; l' O- r
lesions in boys.1,2 Virilization in boys, as manifested1 Z% i3 ~0 P# X* I* @3 C
by enlargement of the penis, development of pubic. H% D& h$ l; b0 F& d
hair, and facial acne without enlargement of testi-
& r" L9 s4 s3 q& }. b4 Vcles, suggests peripheral or pseudopuberty.1-3 We
4 V' j# L/ [9 A2 Treport a 16-month-old boy who presented with the6 D4 C ?6 ~! w5 ~% F, W9 S
enlargement of the phallus and pubic hair develop-$ a9 K# l6 j7 S5 V0 l. K
ment without testicular enlargement, which was due
% |6 u3 [% J& }: i. D F+ X cto the unintentional exposure to androgen gel used by
8 ^' Y7 H5 G' g0 z5 _7 v! K7 Tthe father. The family initially concealed this infor-
3 q' d# G1 m) l- Y0 N$ Nmation, resulting in an extensive work-up for this
% k5 B v) d, f }/ Achild. Given the widespread and easy availability of1 i. d8 _7 J/ D: W9 g( r
testosterone gel and cream, we believe this is proba-
7 h7 Q: O. C1 bbly more common than the rare case report in the& H, V" e# d$ q" `3 a
literature.4
$ [! t; { t x- U% K* RPatient Report, ?) o( @; U; v& ?& C
A 16-month-old white child was referred to the
2 p% _; E) z- V6 j* `8 E, ?endocrine clinic by his pediatrician with the concern; H! |. R$ O. r& P8 A
of early sexual development. His mother noticed
* o5 {, L+ n; Y8 K) T9 w. X5 Flight colored pubic hair development when he was
0 q6 O W* n( C, [; yFrom the 1Division of Pediatric Endocrinology, 2University of L9 {$ l4 P3 E1 k
South Alabama Medical Center, Mobile, Alabama.0 B2 i2 f9 \7 T
Address correspondence to: Samar K. Bhowmick, MD, FACE,% M2 p+ B7 w& R
Professor of Pediatrics, University of South Alabama, College of
{3 D7 a7 M- T t2 AMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;$ I7 |7 [' {: J, [
e-mail: [email protected].- D4 M3 B8 O3 e, |
about 6 to 7 months old, which progressively became: y; P+ H+ @+ T. b! Y! Q3 o* E
darker. She was also concerned about the enlarge-
" Y" J- q" j& w# x7 N {ment of his penis and frequent erections. The child/ s" D1 t7 M4 I4 ^# e% \
was the product of a full-term normal delivery, with c U. _$ g' A& t l6 f
a birth weight of 7 lb 14 oz, and birth length of
4 c* Z& F- t0 J' x! U- i5 V20 inches. He was breast-fed throughout the first year) w* Y! N' y! T; j
of life and was still receiving breast milk along with
& k4 u; e1 ~( R$ @3 l6 F3 wsolid food. He had no hospitalizations or surgery,
2 m* `) R! ~: a* Wand his psychosocial and psychomotor development4 y, f9 b$ g2 f2 X
was age appropriate.
0 `( E: l* S/ @7 W( ?The family history was remarkable for the father,7 r+ G4 ]. x4 Q8 H8 f+ k" z
who was diagnosed with hypothyroidism at age 16,, A$ _: Q, ?- a- m5 A* r8 c
which was treated with thyroxine. The father’s
# v# A$ q5 ^9 d# oheight was 6 feet, and he went through a somewhat5 K0 i% ^7 }2 Q9 T& }1 a
early puberty and had stopped growing by age 14.
% W0 _. t; B, ?( d1 ~: p) f, S% ZThe father denied taking any other medication. The6 L7 P4 [3 _/ H0 V% {' P" f
child’s mother was in good health. Her menarche& Z( l. q, M1 e8 A) u3 D
was at 11 years of age, and her height was at 5 feet
8 u6 V. K! o5 A R9 `/ B/ k. b* I& e5 inches. There was no other family history of pre-
% i4 _5 I( A( z8 X) N$ H4 vcocious sexual development in the first-degree rela-
0 j5 |+ c7 K0 {/ f) dtives. There were no siblings.
+ X, h, q) q( NPhysical Examination$ E, J( a6 G0 z, D7 C
The physical examination revealed a very active,
, ]3 d5 e! C/ Hplayful, and healthy boy. The vital signs documented: s+ F3 o- Z# s X1 T. k8 u+ f) U
a blood pressure of 85/50 mm Hg, his length was* L+ U. V% N0 P5 e4 ^
90 cm (>97th percentile), and his weight was 14.4 kg( M. A5 R9 ^1 c
(also >97th percentile). The observed yearly growth
( f* \1 A$ P0 E6 fvelocity was 30 cm (12 inches). The examination of
4 S! v v+ |/ P( h9 U/ E4 q8 z% n# ^the neck revealed no thyroid enlargement.
. t3 ` F9 P% v9 T' M/ yThe genitourinary examination was remarkable for
- l9 d; Y4 r, H- e6 Lenlargement of the penis, with a stretched length of
0 s9 U8 r+ E, a5 A8 cm and a width of 2 cm. The glans penis was very well7 `2 a, J0 t* {1 w
developed. The pubic hair was Tanner II, mostly around. B7 E+ O; l/ r
5405 W1 _# v" d* o3 d: e
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
5 E% P @% c& B9 G( M* c; ~" y5 {the base of the phallus and was dark and curled. The
2 v4 ?' k. _. _! w* V3 L" mtesticular volume was prepubertal at 2 mL each.+ ]' e1 U" [4 p7 f7 O$ J
The skin was moist and smooth and somewhat
6 ?. k" v2 J' c- w0 ooily. No axillary hair was noted. There were no
* t; u) W2 m' sabnormal skin pigmentations or café-au-lait spots.& h6 @+ Q8 {/ L3 W! }
Neurologic evaluation showed deep tendon reflex 2+; I" m7 ~- V2 h' ?2 B/ K) I9 k
bilateral and symmetrical. There was no suggestion% Z- o1 ?2 d. V. ^
of papilledema.
; q, [2 e3 ?7 Z0 l$ |6 i B5 sLaboratory Evaluation$ _. g F @$ R
The bone age was consistent with 28 months by
- y1 V0 s f, O! L* F" p4 G; I0 rusing the standard of Greulich and Pyle at a chrono-
: d" W) N( q# q8 N+ ?3 ~logic age of 16 months (advanced).5 Chromosomal, K. V8 M( y1 t3 [* w: X
karyotype was 46XY. The thyroid function test
" W/ a8 i5 f" O4 ]7 a( Qshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
# Z' _$ @0 W' x+ o$ N; `7 }0 U/ h6 t. ilating hormone level was 1.3 µIU/mL (both normal)., H( c, N$ i6 E: R$ Q/ n
The concentrations of serum electrolytes, blood
: j" n3 E2 b1 b1 ^/ q/ Zurea nitrogen, creatinine, and calcium all were
* \+ E- p% h* \. k) q0 Y7 s& P) N1 zwithin normal range for his age. The concentration
: r$ q6 Y2 ]8 {# yof serum 17-hydroxyprogesterone was 16 ng/dL( Y+ {0 F! |8 _4 x& e1 v6 {6 n# Y
(normal, 3 to 90 ng/dL), androstenedione was 20% l! T, b" k# l b
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-* e' m; q# W: U* o, X
terone was 38 ng/dL (normal, 50 to 760 ng/dL),- D8 S# V) ?, c
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
( C' w z, ?( z5 c49ng/dL), 11-desoxycortisol (specific compound S)1 b, [1 N8 E0 z7 j/ X
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
: y2 ?# x T3 {* ~# C* Ztisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total7 C$ g# a3 B0 C/ i( X |& p
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),6 H. M5 g7 J. r6 @0 s/ O6 ^( i# E
and β-human chorionic gonadotropin was less than9 O; F+ \0 x. i, ~
5 mIU/mL (normal <5 mIU/mL). Serum follicular
- ?( c$ @8 q y- j) b( Kstimulating hormone and leuteinizing hormone0 d- r! ?' Y6 Z2 {
concentrations were less than 0.05 mIU/mL
8 F3 m( X7 O: O* C2 B/ v3 [; C(prepubertal).
9 C; J: R, p; R* p2 d* x2 WThe parents were notified about the laboratory2 J1 E, f% Z: Y( l# B8 G, \
results and were informed that all of the tests were- E. \1 y6 ]' M& R3 v1 C; I" K9 Z; s
normal except the testosterone level was high. The" Z3 A- P# R5 F, L: R
follow-up visit was arranged within a few weeks to
/ ?) F2 ^) [) s+ aobtain testicular and abdominal sonograms; how-
5 Y! _" r8 d6 `8 b4 sever, the family did not return for 4 months.% H! d3 {, b" [
Physical examination at this time revealed that the
; `, [- [0 i1 U& @% i5 l' Xchild had grown 2.5 cm in 4 months and had gained
" p5 |; p$ r+ K$ `4 |8 \2 kg of weight. Physical examination remained
, |- c6 X$ k9 t* H! b! M ounchanged. Surprisingly, the pubic hair almost com-
4 b; f5 W' w; P$ y4 ?7 Ypletely disappeared except for a few vellous hairs at
$ t2 ^3 d9 ^( v6 j5 U Ythe base of the phallus. Testicular volume was still 2
& e. R5 W6 ^9 a6 T7 HmL, and the size of the penis remained unchanged.6 J2 M; l! _" C# G
The mother also said that the boy was no longer hav-
$ d! W. C7 X: Z, n. e5 t+ x' ying frequent erections.
& i, [7 v5 L/ c3 J5 S4 j7 R. `. q% dBoth parents were again questioned about use of8 Z+ N5 y* p, J) H# I( G
any ointment/creams that they may have applied to
; d: f; } M" J& @the child’s skin. This time the father admitted the6 t) ]8 b% q5 T3 n2 L
Topical Testosterone Exposure / Bhowmick et al 541. W* U; J/ N: p. I6 q
use of testosterone gel twice daily that he was apply-9 Z! [) E3 G2 n
ing over his own shoulders, chest, and back area for' I, T8 H C% G
a year. The father also revealed he was embarrassed
I* y! u& U8 j7 q$ I( j% ito disclose that he was using a testosterone gel pre-
4 M% S' p5 Q* \# w% V9 t4 T! Mscribed by his family physician for decreased libido2 c, i5 g" K% J0 q
secondary to depression.4 o9 i- q9 K% b1 j/ R- O
The child slept in the same bed with parents.
% w- J0 \9 w" j( NThe father would hug the baby and hold him on his
! Q& x2 s9 r: L9 V% {+ ~7 o+ p. nchest for a considerable period of time, causing sig-
! H: D" d) f2 F2 {' cnificant bare skin contact between baby and father.
7 D# Q" D+ d/ L$ P* hThe father also admitted that after the phone call,* E' W& T _% c
when he learned the testosterone level in the baby
[8 Z# q" V6 F& V! Qwas high, he then read the product information; _. K9 f/ [8 o( H* u
packet and concluded that it was most likely the rea-$ l5 S; E! D2 k: F' @! n2 z5 N
son for the child’s virilization. At that time, they
# F% k' ]3 H; s+ D# @2 @! idecided to put the baby in a separate bed, and the; ^9 r7 M4 q" n! l7 F# i$ T3 P
father was not hugging him with bare skin and had! z, ]$ L2 U/ {+ r
been using protective clothing. A repeat testosterone- A! K4 p9 Y$ x
test was ordered, but the family did not go to the
& Q1 d5 b- H) c6 s( olaboratory to obtain the test.
7 c6 B8 O" z5 z; pDiscussion
% p! k. J- `. y+ F1 ~ RPrecocious puberty in boys is defined as secondary/ v! N. i% k( U# y. b
sexual development before 9 years of age.1,4& r' U: ]# z# Q, K
Precocious puberty is termed as central (true) when9 z# C; q# h" |3 U' L
it is caused by the premature activation of hypo-! }- P7 j1 ^( S& K2 e* |' P) m
thalamic pituitary gonadal axis. CPP is more com-
1 X0 o# I) d, T4 A% R# _mon in girls than in boys.1,3 Most boys with CPP* f5 A0 ]8 m6 W+ {8 F
may have a central nervous system lesion that is
. L5 X; I9 [3 {" e9 ?responsible for the early activation of the hypothal-
$ K/ E- i; \; S) \8 t0 samic pituitary gonadal axis.1-3 Thus, greater empha-, Z- x8 r. m0 z) _
sis has been given to neuroradiologic imaging in
* e2 ~, }( P, s& Pboys with precocious puberty. In addition to viril-% K& W( }$ j% ^) r2 i/ h0 f
ization, the clinical hallmark of CPP is the symmet-' r# q4 M: m& x- R0 r
rical testicular growth secondary to stimulation by/ }% r6 I2 {) N! x
gonadotropins.1,3& {7 c! x0 h- G R8 S) |5 \
Gonadotropin-independent peripheral preco-2 V$ T) j4 B: h: Y. p
cious puberty in boys also results from inappropriate! Q. W2 t0 D& D+ |% F* Q2 L
androgenic stimulation from either endogenous or3 u- K0 T& f" S: C! B
exogenous sources, nonpituitary gonadotropin stim-
% z- Q% ~8 U; }" M7 e, d2 W* _ulation, and rare activating mutations.3 Virilizing# H' n6 `6 `1 C$ r3 o/ k7 p
congenital adrenal hyperplasia producing excessive
% J9 s) T. V6 G5 dadrenal androgens is a common cause of precocious7 |' `; G% k" N" o
puberty in boys.3,4
' B9 l4 }$ `/ r2 C9 p( T9 PThe most common form of congenital adrenal& y& A& m, u, ]' h- @
hyperplasia is the 21-hydroxylase enzyme deficiency.
9 b7 }, L" M) JThe 11-β hydroxylase deficiency may also result in) e `' J9 {8 D$ W! ?# B) z
excessive adrenal androgen production, and rarely,! m5 c4 ^- s7 A* t! K' [
an adrenal tumor may also cause adrenal androgen
8 Y& w% l' ?8 `4 C6 D4 Kexcess.1,3
( P) K7 o' }8 a5 Jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 }- D& k7 Y S7 O$ {! W
542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 u7 L* C5 w2 h) m+ r
A unique entity of male-limited gonadotropin-
- a, v2 F$ C/ Z3 Oindependent precocious puberty, which is also known7 E( q8 V3 I& y& D/ X8 ^0 f ?
as testotoxicosis, may cause precocious puberty at a- w" X1 E+ N7 K7 M
very young age. The physical findings in these boys5 g" J$ O- t. h; `* W
with this disorder are full pubertal development,
$ k# t+ t/ ]; ]1 eincluding bilateral testicular growth, similar to boys- v Z0 {6 N( [/ [0 f/ o; N7 w
with CPP. The gonadotropin levels in this disorder0 @" q* a- u5 n, M; d/ _9 i
are suppressed to prepubertal levels and do not show, V* k3 C; k; ^1 C3 C) o
pubertal response of gonadotropin after gonadotropin-
$ H% f) _7 ]+ {4 {0 e2 q8 Kreleasing hormone stimulation. This is a sex-linked$ z6 {7 }# F0 N, F' F
autosomal dominant disorder that affects only4 A+ P r0 Z8 Y# T1 Y! U7 K4 V
males; therefore, other male members of the family, |/ G+ L( W( B$ k" p- u3 n! m# O
may have similar precocious puberty.3
4 g H1 B0 d- ZIn our patient, physical examination was incon-+ J" j" L' Z9 F" [# K
sistent with true precocious puberty since his testi-
# Q! [' ^2 |6 v1 x8 \# g6 x8 v. Gcles were prepubertal in size. However, testotoxicosis% n( P% g) r3 q$ I; P y
was in the differential diagnosis because his father
( Z$ k7 ~! |% K8 N* O, z5 H5 q( istarted puberty somewhat early, and occasionally,: A: }6 I, t9 _ B# h
testicular enlargement is not that evident in the
r* b9 ?8 m& Lbeginning of this process.1 In the absence of a neg-& i* [. @% Z: z/ T& O
ative initial history of androgen exposure, our
+ x7 n( C) U, v3 X9 ]. mbiggest concern was virilizing adrenal hyperplasia,! N' L# R% G# N+ R8 Y
either 21-hydroxylase deficiency or 11-β hydroxylase4 h4 f, x$ w6 x& U$ |0 u% z
deficiency. Those diagnoses were excluded by find-
) g( C5 x: I8 king the normal level of adrenal steroids.
- P L9 T. y, |The diagnosis of exogenous androgens was strongly& c, }8 N3 A" W
suspected in a follow-up visit after 4 months because, R1 ^0 u6 P1 }# e4 j
the physical examination revealed the complete disap-- L* u1 l3 |; b4 S- b
pearance of pubic hair, normal growth velocity, and6 |5 T- ~# o' ~. Z* p
decreased erections. The father admitted using a testos-' Q; S4 a2 o n; r
terone gel, which he concealed at first visit. He was* `2 z8 R) H1 ~+ A2 J% M# l
using it rather frequently, twice a day. The Physicians’
- X. B q2 O) B/ xDesk Reference, or package insert of this product, gel or
/ {$ `$ V) K2 X5 W V% i& Lcream, cautions about dermal testosterone transfer to4 I: C5 R1 L% ]3 a8 o# m
unprotected females through direct skin exposure.
5 } [1 e. t. m- VSerum testosterone level was found to be 2 times the7 H8 c$ \8 q; ?" K, J5 x* V! n+ f
baseline value in those females who were exposed to: g$ ]) ^# W! \ J3 E4 Z! r
even 15 minutes of direct skin contact with their male
8 _$ ]1 W: w5 ]; V$ l4 w' m4 k& x1 j" kpartners.6 However, when a shirt covered the applica-
& u' Z2 q4 k6 ?' n' q) s+ E4 Y$ \2 @' Ction site, this testosterone transfer was prevented.
8 Y# i$ }" b' K# }; j4 EOur patient’s testosterone level was 60 ng/mL,
2 z/ n6 l+ U/ t: L$ q# @which was clearly high. Some studies suggest that& A+ C: l) N3 D" V+ Q% ]
dermal conversion of testosterone to dihydrotestos-; w. z W3 w& k/ R: w. s# \- w6 O& {
terone, which is a more potent metabolite, is more3 I# S1 L: E5 r8 X8 r* P
active in young children exposed to testosterone, C! S$ E, n) a3 e2 C
exogenously7; however, we did not measure a dihy-
8 v _* l5 Y! I0 @: odrotestosterone level in our patient. In addition to
( \$ P" ]/ U; a+ j1 N# W! Pvirilization, exposure to exogenous testosterone in
6 |+ }6 y) J: f) ^5 h; R# ochildren results in an increase in growth velocity and1 M; O' ]' t( V; d5 X( O3 `
advanced bone age, as seen in our patient.& t0 S+ F0 Q, X
The long-term effect of androgen exposure during
, v. L) p1 ?$ M2 c" M3 Y, V6 kearly childhood on pubertal development and final
7 m8 K( F7 I- y6 c- Uadult height are not fully known and always remain4 {5 u2 X* s( I6 A, F1 ^
a concern. Children treated with short-term testos-
( T8 |/ }& A- t% b) L8 |0 @( E& Tterone injection or topical androgen may exhibit some0 R8 L+ \5 s% r% }
acceleration of the skeletal maturation; however, after& e Z9 P. h8 W: l2 }) a
cessation of treatment, the rate of bone maturation
6 y# Y+ `6 R5 v, G$ k1 p5 A, i% Ndecelerates and gradually returns to normal.8,9* i+ x9 }- o( B3 T6 F }
There are conflicting reports and controversy
% W4 n3 S9 P7 J9 x! M9 w2 {over the effect of early androgen exposure on adult
2 G. B* [8 Z, Ypenile length.10,11 Some reports suggest subnormal- L# {9 {) E- M" Z7 M D
adult penile length, apparently because of downreg-
( A, ]- O) t i4 e% uulation of androgen receptor number.10,12 However,
5 }$ N* ]% p( ]8 q9 hSutherland et al13 did not find a correlation between, j8 f& g- H. {: @
childhood testosterone exposure and reduced adult
$ O. w4 _9 _" f8 z% C s; zpenile length in clinical studies.1 d5 Y3 Q# d `$ M; t. M# z
Nonetheless, we do not believe our patient is
2 E: j& z Z: x1 [# o) q# i6 ygoing to experience any of the untoward effects from: F: o, x. F5 k
testosterone exposure as mentioned earlier because
6 s4 q; g7 H, s, ?6 I: N" \, `the exposure was not for a prolonged period of time.
* N1 M4 `1 Z6 v" H- d5 ~Although the bone age was advanced at the time of
8 N# d: V j9 u0 ddiagnosis, the child had a normal growth velocity at
8 @+ y* k! \ h3 }5 Qthe follow-up visit. It is hoped that his final adult& p- s& ^9 H) V6 a1 b
height will not be affected.
/ ?& j* ^% G2 v/ ~. HAlthough rarely reported, the widespread avail-5 {, t3 r% O2 _
ability of androgen products in our society may# b/ z+ D Q* |3 H5 f& }
indeed cause more virilization in male or female
- F& v* C) O, O3 o+ F! ?+ Vchildren than one would realize. Exposure to andro-& |1 y2 m7 y' h% ]7 @( z9 I1 a
gen products must be considered and specific ques-- |" P% `0 U- N0 D1 z* |: f! J4 `
tioning about the use of a testosterone product or; f; O2 }8 P5 P$ ^9 u% f% h
gel should be asked of the family members during2 z. |. y6 b9 R& a# ^
the evaluation of any children who present with vir-
7 |" d% w; J) f, H& O" hilization or peripheral precocious puberty. The diag-# R( z6 }! i+ h9 @
nosis can be established by just a few tests and by
2 Y8 M7 [1 S4 c( t" |appropriate history. The inability to obtain such a
8 k0 S0 a" D, v# o- _% s' Vhistory, or failure to ask the specific questions, may
( }8 q. `! l" I. G/ l; r- rresult in extensive, unnecessary, and expensive
& ^6 Z. l+ M$ B# m# p4 }6 S. r/ Minvestigation. The primary care physician should be3 {6 \1 u, A p% _' p
aware of this fact, because most of these children/ Q8 [6 N, d/ h# h1 b* N, v
may initially present in their practice. The Physicians’
8 m I+ {$ `/ I4 y1 s& L1 qDesk Reference and package insert should also put a
: S( J& R$ Q3 v! n) Lwarning about the virilizing effect on a male or: S! v/ `! T' \
female child who might come in contact with some-/ q1 N+ W2 c. b% r) |
one using any of these products.
( T8 m6 Q# m1 ]" m* J: a$ PReferences
2 U$ ~- Z4 i! i$ a5 x1. Styne DM. The testes: disorder of sexual differentiation
) N! Y* g) g6 k6 ^8 D4 c- `and puberty in the male. In: Sperling MA, ed. Pediatric
* L/ C& f$ f5 M. W! YEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;) g; J) e* L1 M- Z( e' k
2002: 565-628.
; \" P) m5 K% k3 F& J" l2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
% T$ A9 H& d, |+ C+ A1 Gpuberty in children with tumours of the suprasellar pineal% t* C) w! @# u5 `- _1 Z
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areas: organic central precocious puberty. Acta Paediatr.
: B+ C0 S( }; R2001;90:751-756.3 |6 O# M( G# {' L5 O/ F9 p
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
7 I7 k8 @9 B) D' h% Z! oPediatric Endocrinology. 4th ed. New York, NY: Marcel
) E3 C1 b/ T8 @' a; Q* z {Dekker Inc; 2003:211-238.
8 I" n$ C3 h' t6 i5 C4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual. W( B$ b1 [! i& b+ h9 g
development in a two-year-old boy induced by topical: T; ]6 }3 W: N3 x
exposure to testosterone. Pediatrics. 1999;104:e23.
" K( K: b; R8 R; a9 b4 H5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
" ]7 V/ c y; |- X5 n# y7 C6 eSkeletal Development of the Hand and Wrist. 2nd ed.
6 q+ M( A+ R- e( rStanford, CA: Stanford University Press; 1959.7 T: W( k/ e7 o, X! y
6. Physicians’ Desk Reference. Androgel 1% testosterone," ^+ H( t1 \+ v
Unimed Pharmaceutical Inc. Montvale, NJ: Medical; X4 g. r: ]$ W% O$ r! n# k6 r4 T
Economics Company, Inc; 2004:3239-3241.
+ u6 Z. x2 t1 D: q, I% l7 |8 i- i7. Klugo RC, Cerny JC. Response of micropenis to topical# ~ Z5 G' M+ E8 \2 o6 T2 b
testosterone and gonadotropin. J Urol. 1978;119:0 w! O8 M! D! J/ M0 I8 X& T
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