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is a significant concern for physicians. Central
% F, q0 k* B: t' O3 ?# N! z4 vprecocious puberty (CPP), which is mediated
; I) o: d8 D' ithrough the hypothalamic pituitary gonadal axis, has
: p% m) _& f, }* s$ v4 pa higher incidence of organic central nervous system
: a$ u9 D( l- n. ]* D% R4 Q! Rlesions in boys.1,2 Virilization in boys, as manifested# T9 ^- e1 Q3 A- S* {3 R
by enlargement of the penis, development of pubic* a- f2 r) K! g" k
hair, and facial acne without enlargement of testi-
. i* _. d. @+ R7 Y& J) T+ j+ T( ucles, suggests peripheral or pseudopuberty.1-3 We
4 p# h% Z! }+ b% F# |; c( preport a 16-month-old boy who presented with the
. O. P& t z6 o2 Uenlargement of the phallus and pubic hair develop-- Z' ^+ r9 i v) l- d8 W
ment without testicular enlargement, which was due
& W0 V5 V! L, ^; Z" } z1 oto the unintentional exposure to androgen gel used by
8 _. i# g3 c& {! i0 fthe father. The family initially concealed this infor-
0 S+ V% r8 q3 M4 \6 emation, resulting in an extensive work-up for this
- x# v2 J# X) B1 R6 ^child. Given the widespread and easy availability of
& \5 {$ s$ n2 a8 Xtestosterone gel and cream, we believe this is proba-
+ v" P4 \; C. J6 k0 tbly more common than the rare case report in the
4 c- w4 `+ c3 F& ?( K4 }4 Tliterature.4
0 ]" V' ~" F3 j" j7 QPatient Report
5 o- L& i' x1 t3 D* ?+ OA 16-month-old white child was referred to the
% I% h5 N) i: d: ~endocrine clinic by his pediatrician with the concern
7 {5 ^; e: k; Z! j: e& bof early sexual development. His mother noticed
1 B/ I }' M0 G1 j4 S ylight colored pubic hair development when he was
1 G/ m. v* L5 Z# X9 I( |From the 1Division of Pediatric Endocrinology, 2University of
' H1 t' V) O, v! s/ ySouth Alabama Medical Center, Mobile, Alabama.) X8 l5 O" l0 M- L0 {
Address correspondence to: Samar K. Bhowmick, MD, FACE,9 b% q. `' Y i7 d, n
Professor of Pediatrics, University of South Alabama, College of
( E$ {0 O+ d5 P% B& fMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;- a7 X' U- L% ^8 ?, ~. T$ z
e-mail: [email protected].
6 U8 u% J# v) Y! h2 I* j" Xabout 6 to 7 months old, which progressively became
+ ^, F e5 U, h9 \6 kdarker. She was also concerned about the enlarge-
- k$ J7 j3 S, U- `) @ment of his penis and frequent erections. The child
& K7 H1 z( Z3 y. }, ^0 u# twas the product of a full-term normal delivery, with9 C4 x7 _7 G6 O
a birth weight of 7 lb 14 oz, and birth length of
( W& R. W8 f8 R$ S$ W7 D20 inches. He was breast-fed throughout the first year
! ~/ U& j0 S d7 X5 [of life and was still receiving breast milk along with
; p& ]9 N" H9 K) ?solid food. He had no hospitalizations or surgery,+ k! M" F& ]. X5 k: {
and his psychosocial and psychomotor development
! X2 y: z& L; |7 X& Rwas age appropriate.
# K; u* s$ }$ K" R* kThe family history was remarkable for the father,
" W: A% g* c2 Zwho was diagnosed with hypothyroidism at age 16,3 z0 h/ A* e+ T7 j p+ J3 e
which was treated with thyroxine. The father’s
6 t9 _; u2 F* I- v* x* T9 T# gheight was 6 feet, and he went through a somewhat
* ^8 |) e# h6 ]2 @( W' [* Vearly puberty and had stopped growing by age 14.0 b8 |) ~# d) r
The father denied taking any other medication. The
, Q% W$ l4 ~3 E" X! W+ Bchild’s mother was in good health. Her menarche4 b# n H- D1 g5 [8 d5 j
was at 11 years of age, and her height was at 5 feet: G; n, P F, ~
5 inches. There was no other family history of pre-
8 A/ r4 R& U' a+ @( v3 S- Y! Acocious sexual development in the first-degree rela-
8 r& E0 f- H4 `9 j) Ctives. There were no siblings.
- k; ]2 Y& T; ]Physical Examination u8 B7 O" v+ j2 |
The physical examination revealed a very active,
6 L0 r6 X1 n2 y5 Y5 o. _playful, and healthy boy. The vital signs documented, n( Y; T* W! {0 Y$ q
a blood pressure of 85/50 mm Hg, his length was
" f8 e! Y, a8 X7 i9 Z& {4 _9 D. x/ {90 cm (>97th percentile), and his weight was 14.4 kg
b3 j1 Q ?+ b% W( o(also >97th percentile). The observed yearly growth) M# o" \) @. y( d
velocity was 30 cm (12 inches). The examination of* R# ?+ k- @; `
the neck revealed no thyroid enlargement.
. q1 j8 q, @; _8 ]The genitourinary examination was remarkable for# o' x5 ~# g6 N( @# ~! O
enlargement of the penis, with a stretched length of z* L5 X0 a( k
8 cm and a width of 2 cm. The glans penis was very well
: p) l" u' S& ?+ [( a1 {5 ]developed. The pubic hair was Tanner II, mostly around
. Q# u; }/ a9 p0 q+ @! b3 h540; t% b. i& Y9 ]0 K( B
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
7 ~- ?; t, P L% M( [* O( E% j/ ~the base of the phallus and was dark and curled. The
Z& F0 U7 I% n3 O, h) ntesticular volume was prepubertal at 2 mL each.% D! } W: P; f/ s( v8 r
The skin was moist and smooth and somewhat
; o! o% o* f# ~3 X Toily. No axillary hair was noted. There were no
6 V0 l6 F0 O( a1 babnormal skin pigmentations or café-au-lait spots., {' ]2 j' M& n
Neurologic evaluation showed deep tendon reflex 2+: ~5 s( I# [1 }
bilateral and symmetrical. There was no suggestion
! f# O9 D% x$ F4 y- a# m/ H1 u yof papilledema.
: I5 B+ t; o gLaboratory Evaluation
7 h- ^; p8 G" Q. ]4 u I! C: iThe bone age was consistent with 28 months by
& p8 p* ^7 X" [9 B0 h+ Q9 }% m/ S8 vusing the standard of Greulich and Pyle at a chrono-1 w. \! I5 F o* f6 s
logic age of 16 months (advanced).5 Chromosomal
- e3 L$ b9 M4 R" l1 l* u5 b0 ^karyotype was 46XY. The thyroid function test
9 o y* p/ U" p6 l+ e6 sshowed a free T4 of 1.69 ng/dL, and thyroid stimu-3 O3 E3 b6 S6 {
lating hormone level was 1.3 µIU/mL (both normal).
5 w( v5 q9 E4 c% d) [" m6 vThe concentrations of serum electrolytes, blood* v) E% @, O0 q+ _
urea nitrogen, creatinine, and calcium all were
) [1 W2 L' r/ m. lwithin normal range for his age. The concentration
0 j$ b% U. j! t s( o8 Dof serum 17-hydroxyprogesterone was 16 ng/dL4 t" H! o( `6 b. o/ x0 ^
(normal, 3 to 90 ng/dL), androstenedione was 20 V1 T' _ A e2 N
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
; V& W1 t0 q/ p# y* T. Zterone was 38 ng/dL (normal, 50 to 760 ng/dL),) P2 p: E4 Y8 {! b& X
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
9 T& S" z4 @, w49ng/dL), 11-desoxycortisol (specific compound S)
% v: \# I" @5 K+ cwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
3 c) ~4 O! ^" X, t$ _+ U0 `tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total( i& q6 n/ g0 M( w( f* H9 D
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
! y+ ~" j3 K- d, ~: m' E; p% ~5 ]and β-human chorionic gonadotropin was less than
6 ~" s P8 f& s. i5 mIU/mL (normal <5 mIU/mL). Serum follicular
2 g# e' u, U. t* p% O& a7 \ }$ dstimulating hormone and leuteinizing hormone
. L+ m9 H/ c) c! l" E) G7 w3 A2 Sconcentrations were less than 0.05 mIU/mL
) p3 B7 w& }) r4 b I1 P4 ^) A(prepubertal).
' z0 f! P1 L6 h; qThe parents were notified about the laboratory
% }+ g/ H3 ]& e& i1 ^results and were informed that all of the tests were
0 O( l+ R& _& ]3 w2 Bnormal except the testosterone level was high. The4 Z! e# Y/ K) v6 n
follow-up visit was arranged within a few weeks to
+ k: x. y2 R% H4 Dobtain testicular and abdominal sonograms; how-2 ~* Z3 M4 @7 h; s6 C0 Z. }* f; Q
ever, the family did not return for 4 months.8 ~3 R8 A0 Y- X* ?) _& ^# f E
Physical examination at this time revealed that the- ]' T) C* R, h( z2 O
child had grown 2.5 cm in 4 months and had gained
& w% z' j1 R# [1 t( d- ?2 kg of weight. Physical examination remained
" A5 M5 l$ T+ I- H/ sunchanged. Surprisingly, the pubic hair almost com-
* Z) H& t5 \9 {& S. z( Z% F% s! \7 Epletely disappeared except for a few vellous hairs at( o# w5 W$ E: `! w' e/ l
the base of the phallus. Testicular volume was still 2
' b1 c+ f* f& t3 E B( t! e G8 c# amL, and the size of the penis remained unchanged.
+ [) ^2 @ i5 K4 m5 LThe mother also said that the boy was no longer hav-2 @. C5 r5 l+ a x" n6 a9 J! d1 g
ing frequent erections.
6 |* }# ~5 I' W0 XBoth parents were again questioned about use of9 K- u! F' K' |* F2 A/ a
any ointment/creams that they may have applied to
# u6 n, ~( r8 i& m. Jthe child’s skin. This time the father admitted the y2 s2 }. ?! `, H7 v: ]+ n
Topical Testosterone Exposure / Bhowmick et al 541- p3 z" R+ H- e1 ]# g
use of testosterone gel twice daily that he was apply-: G- d$ K( P: R5 M+ O5 q
ing over his own shoulders, chest, and back area for0 f' o$ C$ ^+ g# D2 m
a year. The father also revealed he was embarrassed( k/ }& p0 Y) f- O3 f2 q
to disclose that he was using a testosterone gel pre-
# Q* c5 o0 [ L. Fscribed by his family physician for decreased libido
. l: B1 @ k) [7 Z* u2 i* Nsecondary to depression.
$ t2 M* V+ t1 v5 `+ mThe child slept in the same bed with parents. N# f$ F2 W' J, X
The father would hug the baby and hold him on his2 f! _& W3 s+ _
chest for a considerable period of time, causing sig-- x7 ?# p5 G$ `! w5 }6 e6 c' Q- R: [
nificant bare skin contact between baby and father." }9 p2 F: o& G8 r2 _: ^
The father also admitted that after the phone call,3 Q3 G- y0 G7 p. V i" \ c, y0 W
when he learned the testosterone level in the baby
4 _: U# k" Z/ U! \6 Pwas high, he then read the product information! n$ g6 A; D( h
packet and concluded that it was most likely the rea-. p$ h: J! F$ D7 A
son for the child’s virilization. At that time, they+ \4 c, U& W$ [+ D! i3 P" \9 l4 c' m$ Y. }
decided to put the baby in a separate bed, and the
/ n0 F9 p4 S1 Mfather was not hugging him with bare skin and had @, I* ^& T$ M7 S/ _3 `
been using protective clothing. A repeat testosterone
% S. A# G; |; n, S) T2 }* l4 @test was ordered, but the family did not go to the
* `& }: p# u/ d( p0 rlaboratory to obtain the test.
- p8 h/ v. ~% _0 h1 \4 k' x& y+ I* nDiscussion' K0 l' W) ]/ m
Precocious puberty in boys is defined as secondary {7 R' x+ E- B2 E F& A8 w' ^
sexual development before 9 years of age.1,4
& D. h: a3 _1 m) R. WPrecocious puberty is termed as central (true) when7 N$ ^2 p$ C/ e
it is caused by the premature activation of hypo-
# _+ ?( Q" L' L7 j qthalamic pituitary gonadal axis. CPP is more com-
4 Q. n0 j: J( d( ~# B0 `& _6 a# Hmon in girls than in boys.1,3 Most boys with CPP6 U( m9 ?* {( B6 H! {
may have a central nervous system lesion that is
5 S+ L% n+ K: p. Aresponsible for the early activation of the hypothal-8 R9 A% D3 G' U v
amic pituitary gonadal axis.1-3 Thus, greater empha-" W! n' R+ f% i. X
sis has been given to neuroradiologic imaging in
5 {# F* @$ L3 K( cboys with precocious puberty. In addition to viril-, l0 ?1 r4 U- ?" x
ization, the clinical hallmark of CPP is the symmet-* N4 u9 U O% S k
rical testicular growth secondary to stimulation by- }/ k! r& G" K9 L3 h9 g
gonadotropins.1,3+ j/ J; |! z7 Q1 I; R
Gonadotropin-independent peripheral preco-
/ V( A) U. C1 D$ |( gcious puberty in boys also results from inappropriate
! ~- c4 I) I8 d5 [. zandrogenic stimulation from either endogenous or
, V L. \' Z; R4 ?5 D, oexogenous sources, nonpituitary gonadotropin stim-
9 Y: K+ M( R& B1 l& M- K3 M7 D' f: ~, w6 mulation, and rare activating mutations.3 Virilizing
. Z5 g$ @- w/ Xcongenital adrenal hyperplasia producing excessive4 y$ w. u2 z- f) X+ K _. e7 ~- g/ z
adrenal androgens is a common cause of precocious9 v, n0 u8 D: F
puberty in boys.3,4
4 a' L" K. r, s- n: o& b8 TThe most common form of congenital adrenal( V3 D2 J8 I5 S8 @9 W+ U& A2 K9 F
hyperplasia is the 21-hydroxylase enzyme deficiency.9 O% K9 m( m, z) t- E& u7 B: i% f( L
The 11-β hydroxylase deficiency may also result in, w$ v$ [1 d. U" w; H( ?
excessive adrenal androgen production, and rarely,; Q! ^2 J* E' K1 ?/ @" ?# P; @3 B
an adrenal tumor may also cause adrenal androgen
' n9 i t2 d! _4 e4 W1 x- o2 Aexcess.1,3
1 S' m& `* `! p. f Zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" a+ S, d ^; ?7 R: S) p
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
1 v1 ] R1 O4 cA unique entity of male-limited gonadotropin-$ g4 Y7 G! \2 ? n
independent precocious puberty, which is also known
; c% E( A( P: xas testotoxicosis, may cause precocious puberty at a
+ D q( u' U8 mvery young age. The physical findings in these boys" b: C! e+ M: y. c# @7 {
with this disorder are full pubertal development," F$ {1 G1 S. Z% V$ F% H
including bilateral testicular growth, similar to boys
' r$ D8 c; x( ~' m4 u& @with CPP. The gonadotropin levels in this disorder) d" b* T- h6 X3 A8 w% i; M1 j
are suppressed to prepubertal levels and do not show
5 |9 V) @$ J3 H' \ dpubertal response of gonadotropin after gonadotropin-
, Q! q9 z2 V* i+ \# Creleasing hormone stimulation. This is a sex-linked7 z0 a- [$ c$ M7 E5 h# u4 g
autosomal dominant disorder that affects only
3 b' F6 h3 }, D% G% t. mmales; therefore, other male members of the family
& K2 _4 X2 L7 umay have similar precocious puberty.38 x: h# ~7 h4 o9 N4 f3 Z/ A& u& W1 a q, `% P
In our patient, physical examination was incon-
9 i8 O: [8 ]: n qsistent with true precocious puberty since his testi-
5 |8 L' @2 i& {0 z, U* zcles were prepubertal in size. However, testotoxicosis+ j+ |8 g' {! U+ C+ a. D* z
was in the differential diagnosis because his father
1 K# J1 f, {8 `5 }5 z' G" ?started puberty somewhat early, and occasionally,7 m% k. v: ~' Y. E+ Z, L% y
testicular enlargement is not that evident in the, A4 w1 o: N' s" l# a. N0 O6 X( ]+ H
beginning of this process.1 In the absence of a neg-
# g& d% F: H" }2 G9 p0 x6 Sative initial history of androgen exposure, our) k, I3 }; r: z- j$ l7 T9 ]
biggest concern was virilizing adrenal hyperplasia,0 @! h+ s: `1 u) T1 [" V* x9 O7 r
either 21-hydroxylase deficiency or 11-β hydroxylase
* a+ [. X; W$ C9 ?/ x Hdeficiency. Those diagnoses were excluded by find-; E. c! o- V) U) c
ing the normal level of adrenal steroids.6 t0 h1 \! C0 y% O4 D, x6 [
The diagnosis of exogenous androgens was strongly
5 R$ N$ G/ G2 P% A5 ^- ksuspected in a follow-up visit after 4 months because
. `1 N7 l/ h- q7 p0 R3 Ythe physical examination revealed the complete disap-
& }7 L6 c6 v& r" _" s) opearance of pubic hair, normal growth velocity, and
4 Z h2 r G# ], Wdecreased erections. The father admitted using a testos-
$ a/ j3 }: q8 f8 v4 Zterone gel, which he concealed at first visit. He was D) y& m* |/ ] W7 r
using it rather frequently, twice a day. The Physicians’
' Y. i6 z' f" d! W* SDesk Reference, or package insert of this product, gel or
- y1 K6 d0 z+ Wcream, cautions about dermal testosterone transfer to, l+ M2 H; O) j- r, p0 `
unprotected females through direct skin exposure.
% c9 k+ p- {# Q8 o$ BSerum testosterone level was found to be 2 times the
4 S1 y) z% `- C, j+ ]0 @4 M Ebaseline value in those females who were exposed to5 |: b4 W) m! n9 l! }& q" S5 y( v
even 15 minutes of direct skin contact with their male
h' m# H( k) epartners.6 However, when a shirt covered the applica-
0 o3 |8 h! E' _2 M, gtion site, this testosterone transfer was prevented.
9 k- i% y" Z( i: G N& Y0 COur patient’s testosterone level was 60 ng/mL,
1 Z L3 I. ~$ z5 e! t2 Jwhich was clearly high. Some studies suggest that0 E9 V% O- ^7 S; q% J; U
dermal conversion of testosterone to dihydrotestos-
6 h" N1 [! n. @terone, which is a more potent metabolite, is more( H& b. s; T' l( r) o! b) h
active in young children exposed to testosterone
: D m; |% N8 X2 A2 X6 Rexogenously7; however, we did not measure a dihy-
& S Z' D' B! a) b$ ~( |1 N Jdrotestosterone level in our patient. In addition to9 Z: q: K* \: t+ p0 `
virilization, exposure to exogenous testosterone in3 q; l' W: F6 t, b2 }
children results in an increase in growth velocity and
6 @, p7 u! a/ s9 Dadvanced bone age, as seen in our patient.( I( X( h) e( U1 O" W' j4 l
The long-term effect of androgen exposure during
( l$ [1 Q/ n( B* ~early childhood on pubertal development and final
' o# h$ B' Q& l9 p5 ?, ^adult height are not fully known and always remain0 G% {- d$ `' c5 j2 K5 {
a concern. Children treated with short-term testos-
. G; J4 P- n5 Z: P4 Qterone injection or topical androgen may exhibit some* R4 T6 b7 B- Y M. J& j
acceleration of the skeletal maturation; however, after
: R% U8 G4 {0 {cessation of treatment, the rate of bone maturation
% W3 L: C5 X- |5 Xdecelerates and gradually returns to normal.8,9
4 X/ i n1 T# W4 `' T* T9 p/ VThere are conflicting reports and controversy
7 R0 c1 \$ L9 Z6 t# u& \$ jover the effect of early androgen exposure on adult
7 |7 p5 R0 G; U9 B0 k. H9 Rpenile length.10,11 Some reports suggest subnormal- i- [2 W1 y$ K
adult penile length, apparently because of downreg-
9 M0 }# ^$ I: y1 t, n8 m* Hulation of androgen receptor number.10,12 However,! i8 V, @* m S2 \
Sutherland et al13 did not find a correlation between# ~! {- j1 n3 H1 Y" K" M( i
childhood testosterone exposure and reduced adult5 s3 R8 q# z. e/ ^6 }. r2 _
penile length in clinical studies.
1 g8 B) K) j, ], _7 W; C( sNonetheless, we do not believe our patient is
/ l% I3 h/ W+ C2 F4 }& A- [going to experience any of the untoward effects from/ p* u |6 h4 A) N5 p% m1 B' t
testosterone exposure as mentioned earlier because
7 o' A" x" ~' I3 B( \the exposure was not for a prolonged period of time.3 _% q, J& k) l) I% F" w
Although the bone age was advanced at the time of
; Y1 v$ J7 B: x" n h1 g0 qdiagnosis, the child had a normal growth velocity at
+ C9 ]6 M; x" [, i. Mthe follow-up visit. It is hoped that his final adult
+ |& k+ r" q) g* i- \height will not be affected.
5 U4 E1 U* W" F3 V3 ^/ \Although rarely reported, the widespread avail-
8 M7 ~$ m. A; K4 Yability of androgen products in our society may
: | a1 u( P; W& V" v9 Dindeed cause more virilization in male or female
$ U) G; s( S6 k; c/ Dchildren than one would realize. Exposure to andro-/ e8 ~& G4 L9 a) e# N& p
gen products must be considered and specific ques-
* E) v( E \ R6 W; G- \3 N( J: utioning about the use of a testosterone product or6 e5 {1 z1 p: @+ s5 ~# y5 N
gel should be asked of the family members during
, M, ?' ?, ?4 N$ f9 o mthe evaluation of any children who present with vir- J0 ~' @6 j! F
ilization or peripheral precocious puberty. The diag-/ u$ Z# G; [% N3 M5 e; A/ o
nosis can be established by just a few tests and by* F: G# {8 X) Z2 z* T S1 P
appropriate history. The inability to obtain such a% z* z0 s ?& Y( u2 D" R
history, or failure to ask the specific questions, may3 Q4 J6 w% T6 `" v9 O. O( M& e
result in extensive, unnecessary, and expensive
7 u" I2 W( ]# t1 E7 v) i2 Vinvestigation. The primary care physician should be
1 @) D2 r* z3 j+ b* J0 Oaware of this fact, because most of these children
! o) H. A. {2 zmay initially present in their practice. The Physicians’
+ d: t4 `- x+ F2 [7 FDesk Reference and package insert should also put a
( k% {+ G, g7 g, J" y. jwarning about the virilizing effect on a male or. s6 s: d, X# ]6 m' J) j- T( l! ^2 c
female child who might come in contact with some-
8 \9 V5 ]- E* ?8 S4 {9 fone using any of these products.
/ J& U1 T/ \- P9 A5 b MReferences& N& n' i' B4 o' |9 ~
1. Styne DM. The testes: disorder of sexual differentiation
' Z2 O: }* y8 F1 C1 s- m# \8 qand puberty in the male. In: Sperling MA, ed. Pediatric
3 ?3 O8 a& n4 uEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
4 t; V" J9 n2 Z+ F) V/ \ l# [' i2002: 565-628.
]: C' d8 g8 ^: |+ b! _2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
7 G. H5 z6 P3 q+ ?; }1 A% u& _" Hpuberty in children with tumours of the suprasellar pineal7 F* p7 ~& k! s
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
2 J% q0 o" d, {/ mTopical Testosterone Exposure / Bhowmick et al 543
& C8 O! E6 n! T: s8 B kareas: organic central precocious puberty. Acta Paediatr.4 C7 P6 |, ^+ ^, K. z
2001;90:751-756.
" n8 z |; q* \4 A2 F3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.( X4 ^' \ m" S. M
Pediatric Endocrinology. 4th ed. New York, NY: Marcel; f; N4 e6 k2 N
Dekker Inc; 2003:211-238.
; J& X( v" S" M- B7 Q# J4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
- ^3 H* X5 Z' q) L( idevelopment in a two-year-old boy induced by topical3 @" `" Z7 L) y1 z8 l, h# [8 J
exposure to testosterone. Pediatrics. 1999;104:e23.7 ?% r' x# o$ m! ~4 ^4 q5 P
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of- ^4 T; [6 r" Y9 ]9 Y5 g) j
Skeletal Development of the Hand and Wrist. 2nd ed.
8 W9 e! G* {% YStanford, CA: Stanford University Press; 1959.
6 A: p5 ? U) E# m* d" i6. Physicians’ Desk Reference. Androgel 1% testosterone,
p u- @. o/ a: a* P+ ^3 ?Unimed Pharmaceutical Inc. Montvale, NJ: Medical
' Y* T3 y9 W' xEconomics Company, Inc; 2004:3239-3241.
; Y+ W9 [, n5 u( E! P% o7. Klugo RC, Cerny JC. Response of micropenis to topical
, G; r/ a- R! _, jtestosterone and gonadotropin. J Urol. 1978;119:8 |0 v# B" p' l& }8 G' R# H
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