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is a significant concern for physicians. Central* o7 K. h; e% S; ?
precocious puberty (CPP), which is mediated
0 ^: i- x4 D4 r- C& tthrough the hypothalamic pituitary gonadal axis, has& z9 F" O( O; t
a higher incidence of organic central nervous system
5 p" l+ A7 R6 Nlesions in boys.1,2 Virilization in boys, as manifested
4 \) ]4 a% ]# n' v8 K$ Z& hby enlargement of the penis, development of pubic
# ~0 M+ G& u. Q% I5 A' vhair, and facial acne without enlargement of testi-
1 P! E2 v8 m- c; {: d- ~cles, suggests peripheral or pseudopuberty.1-3 We
4 z0 p5 J" ~$ D$ u: Areport a 16-month-old boy who presented with the7 H) W# I. E7 Z) y! r- i& G
enlargement of the phallus and pubic hair develop-
6 Q3 P0 z/ c/ Q$ tment without testicular enlargement, which was due
6 ?7 _9 T. W% I. |2 y6 l2 ^2 lto the unintentional exposure to androgen gel used by
' f6 {% I3 x3 v8 V; B- Sthe father. The family initially concealed this infor-3 J/ Z6 M9 g5 V# B! n; P
mation, resulting in an extensive work-up for this% C4 o8 p& l4 X6 O
child. Given the widespread and easy availability of
# O$ }6 O7 o# F: z' C( x ktestosterone gel and cream, we believe this is proba-
: @2 t( o6 i" a4 A) ?! n* ably more common than the rare case report in the
1 @3 L; u2 ~9 ]; oliterature.4
8 q: x: ?4 q) @1 U. k0 v ?Patient Report7 l5 m) T4 I# I9 p
A 16-month-old white child was referred to the
& F1 u$ l( c- sendocrine clinic by his pediatrician with the concern
' w* ^+ F3 M% X; c+ T. ]of early sexual development. His mother noticed1 }, b( u; D0 L& M( G
light colored pubic hair development when he was
6 K6 Z( q+ u ?; K* a0 t" h- r" @From the 1Division of Pediatric Endocrinology, 2University of0 D1 q% U0 k4 t$ ^4 j! b* g2 V
South Alabama Medical Center, Mobile, Alabama." M) R; B. \ K! ]
Address correspondence to: Samar K. Bhowmick, MD, FACE,. g2 b0 D7 B6 U9 L& A8 T) _
Professor of Pediatrics, University of South Alabama, College of
! _' |5 ?7 o/ s8 [! KMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;6 A# ], {3 a9 N
e-mail: [email protected].! _$ O8 {# \0 a1 L+ j3 B
about 6 to 7 months old, which progressively became- ?. o) v5 J) t. S4 {5 E, v$ J
darker. She was also concerned about the enlarge-
6 {+ _5 R& L% _# m) p6 B& Oment of his penis and frequent erections. The child
- ?% w7 U8 D/ r7 f2 Iwas the product of a full-term normal delivery, with! }& [* _6 r/ v3 _" a
a birth weight of 7 lb 14 oz, and birth length of
) n* |6 Q6 V! d20 inches. He was breast-fed throughout the first year# z) ?4 s. A8 I! { f
of life and was still receiving breast milk along with
, X. p; P4 Y. Y0 Msolid food. He had no hospitalizations or surgery,
7 z6 x6 ^5 l# q! _% mand his psychosocial and psychomotor development
/ r, e. |( ~* O& m/ ]' E. `was age appropriate.: ]# P% _' C! h- u& Y. a
The family history was remarkable for the father,% V3 Z- P; [9 _- E
who was diagnosed with hypothyroidism at age 16,( H3 k. U, z! c: _
which was treated with thyroxine. The father’s
$ r& A3 b, H1 o* } ^" a8 v- S0 B+ @height was 6 feet, and he went through a somewhat0 O8 p$ A2 _/ C: r0 D5 b. G3 l H- [
early puberty and had stopped growing by age 14.
: B; i( Y7 e6 HThe father denied taking any other medication. The" C' K% y6 ~$ K0 @4 M
child’s mother was in good health. Her menarche
) {1 B+ p. |) Q. I7 Zwas at 11 years of age, and her height was at 5 feet% K& E, i( V& ^
5 inches. There was no other family history of pre-
9 W0 P* s; U0 ycocious sexual development in the first-degree rela-
; }) m: g+ W$ r Itives. There were no siblings.
" O$ p4 p* a# r0 \' _' TPhysical Examination/ E* v6 z, i6 S6 S. i/ ]" p
The physical examination revealed a very active,' l1 S, R& a' ?% m/ W2 v
playful, and healthy boy. The vital signs documented$ Y1 i) a9 D+ d9 |# D
a blood pressure of 85/50 mm Hg, his length was
4 d: @5 j J. ]# Q90 cm (>97th percentile), and his weight was 14.4 kg/ y6 G0 K/ k. _; V. g% G7 X$ E
(also >97th percentile). The observed yearly growth
2 U% U, x. e' u5 @: ^0 Bvelocity was 30 cm (12 inches). The examination of5 Y$ i: B! ~ O4 P- m- |
the neck revealed no thyroid enlargement.
4 Q: U: V e/ O; P. ^The genitourinary examination was remarkable for6 {+ N) k7 ~/ f+ a
enlargement of the penis, with a stretched length of! ^1 [9 R* D6 X( U" [
8 cm and a width of 2 cm. The glans penis was very well0 e% k/ b9 D' `" m7 B+ K
developed. The pubic hair was Tanner II, mostly around+ K% ?" d2 f0 E$ I0 X# P3 w
540# J$ b0 W" ]: ~* R7 E( h
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
# B5 r# i. [! Pthe base of the phallus and was dark and curled. The8 j: t0 s: R' s( _; @
testicular volume was prepubertal at 2 mL each.# A$ X0 |; O' H9 V0 ^: H) j, }" z) \& l
The skin was moist and smooth and somewhat
% z- t( P8 @$ \/ G- s1 [1 f- Joily. No axillary hair was noted. There were no
) G) [+ v+ \+ T M1 nabnormal skin pigmentations or café-au-lait spots.
! P: x4 \! g- F2 \Neurologic evaluation showed deep tendon reflex 2+) p4 x- y5 B2 N+ I6 w
bilateral and symmetrical. There was no suggestion
) a3 Y% Z; O) y% T4 E/ _of papilledema.
, |. a- E1 X1 c! D oLaboratory Evaluation' M8 V( q/ [% e& n* l
The bone age was consistent with 28 months by
0 j* }) s6 c4 g1 a$ [/ o3 V- T2 \/ busing the standard of Greulich and Pyle at a chrono-
( W/ s. B3 g9 `3 H- w/ Q# {/ O' Zlogic age of 16 months (advanced).5 Chromosomal! g& v8 |& k; r
karyotype was 46XY. The thyroid function test& g ?2 ` h; d' p5 j ?( u
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
. E K/ a& G7 W8 `8 W& ^lating hormone level was 1.3 µIU/mL (both normal).3 q5 c; _7 F# w8 ~" }9 e; Q
The concentrations of serum electrolytes, blood! i8 N0 m2 [. X+ N& ?6 F7 a3 g
urea nitrogen, creatinine, and calcium all were! x |# L1 d: V
within normal range for his age. The concentration7 e0 D" F. Q$ V/ Z6 @, q3 E( d
of serum 17-hydroxyprogesterone was 16 ng/dL R% X* e7 V8 |( |: V. d4 ]" |5 j7 e
(normal, 3 to 90 ng/dL), androstenedione was 20
7 h! e* i# Z6 cng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-' ]9 z1 I: j+ J& L
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
7 c- }. K9 k+ [8 jdesoxycorticosterone was 4.3 ng/dL (normal, 7 to$ ]! \$ B5 p( u# o
49ng/dL), 11-desoxycortisol (specific compound S)
y" e- j( v* J U. P8 jwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
) y6 d7 h' w' T" h# i4 rtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
7 W! e& q7 Z9 y, E/ u4 ktestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
1 j/ T; x m# Z; N( k9 Wand β-human chorionic gonadotropin was less than
0 O5 U7 c& c: O/ W* x' z* L% M5 mIU/mL (normal <5 mIU/mL). Serum follicular9 i+ ]+ `/ C3 V; }! T
stimulating hormone and leuteinizing hormone4 y: @' h7 z# p/ N Q' ]: G# g
concentrations were less than 0.05 mIU/mL( C. P+ x( B6 z* o- M' V1 V9 _
(prepubertal).
% D1 b, O, C% ]4 EThe parents were notified about the laboratory% x% P8 M& v7 w- ^/ t. h+ h% F: V. r
results and were informed that all of the tests were1 [/ S* T1 I q* @4 L
normal except the testosterone level was high. The
) i9 O+ a2 `+ w: N7 J; Wfollow-up visit was arranged within a few weeks to
( U& b1 _' }0 l9 D( A- fobtain testicular and abdominal sonograms; how-
( B3 t: P7 G" ]3 H9 }4 [9 Vever, the family did not return for 4 months.
, ?& K+ N& `( L' |Physical examination at this time revealed that the0 K2 C- Y2 M0 b3 W
child had grown 2.5 cm in 4 months and had gained0 B" H& z, T6 g5 p1 [
2 kg of weight. Physical examination remained2 K# z" B9 D7 B
unchanged. Surprisingly, the pubic hair almost com-
7 ^' L, j( t8 Apletely disappeared except for a few vellous hairs at
( m& [' z' j- c& s; f+ z( dthe base of the phallus. Testicular volume was still 21 T' v; W" X4 M, a1 m
mL, and the size of the penis remained unchanged.
; Z3 b! m4 B% U% [2 U- ^* [$ N8 aThe mother also said that the boy was no longer hav-4 t. E# I2 @ N( o+ f6 ?
ing frequent erections.
3 @6 @6 @& _- ^8 k( B9 e6 N6 N' w5 B. uBoth parents were again questioned about use of7 @( l6 S# k1 N
any ointment/creams that they may have applied to
# w8 u2 F1 [$ K H) fthe child’s skin. This time the father admitted the( `: M: E. q9 S1 W) z
Topical Testosterone Exposure / Bhowmick et al 541
: [$ F$ Z- r! e% J& n1 d. Z/ ruse of testosterone gel twice daily that he was apply-; @( I: s' O& D. t4 C3 d! J
ing over his own shoulders, chest, and back area for5 k0 K7 A! F) u$ p7 |- o1 W
a year. The father also revealed he was embarrassed
: Q6 H, e$ B. n& d0 ^- D( xto disclose that he was using a testosterone gel pre-7 q. L4 x) U+ q# Q7 G1 e
scribed by his family physician for decreased libido
3 b4 D% w- J3 H! A: ]secondary to depression.
5 J: t4 |/ J. o: o2 zThe child slept in the same bed with parents.6 c6 o/ h" J0 _) Q. j
The father would hug the baby and hold him on his
' g `2 Y2 e4 J3 r, _chest for a considerable period of time, causing sig-
- g& f- Z6 C; ^8 r" f! Cnificant bare skin contact between baby and father.0 _9 A s$ I& @
The father also admitted that after the phone call,6 J6 n+ t5 s6 E0 f$ g' t9 w
when he learned the testosterone level in the baby" |+ d/ f! Y k7 } P. g
was high, he then read the product information* O) N- u+ l5 X# m6 v0 z
packet and concluded that it was most likely the rea-
7 d$ T. N* a0 R Rson for the child’s virilization. At that time, they
. C* {& R( E' H2 {* I, fdecided to put the baby in a separate bed, and the- I/ c4 e2 i) u4 G
father was not hugging him with bare skin and had
* T# B3 ?0 \7 b/ J* @/ W# dbeen using protective clothing. A repeat testosterone6 E) I& @7 c u+ B% m3 v
test was ordered, but the family did not go to the
! n0 H6 [8 b3 P8 j$ ^laboratory to obtain the test.
5 c4 J% {$ H+ X9 CDiscussion
3 U0 |0 G6 i3 n# i" H( I, xPrecocious puberty in boys is defined as secondary) b6 n$ d! {0 l, i1 l
sexual development before 9 years of age.1,41 S; k$ }3 K) p4 F
Precocious puberty is termed as central (true) when% @- l* X' ^0 A* B
it is caused by the premature activation of hypo-- O+ W( P7 S$ J
thalamic pituitary gonadal axis. CPP is more com-
1 f) i$ S c+ T$ H$ c$ Qmon in girls than in boys.1,3 Most boys with CPP
4 L' u( X" c$ w0 ]8 X% k* N( @0 |may have a central nervous system lesion that is% t$ j7 n( z: P+ H+ e" P k" x+ E
responsible for the early activation of the hypothal-
7 |" X, Y7 ^! t. t/ Kamic pituitary gonadal axis.1-3 Thus, greater empha-
* V. k/ Q$ t+ ^ ~sis has been given to neuroradiologic imaging in
/ f3 z) m _& }- H1 Jboys with precocious puberty. In addition to viril-, f/ V, W; J. `' g
ization, the clinical hallmark of CPP is the symmet-
. m7 ~; M; F5 \4 r; x% Irical testicular growth secondary to stimulation by5 s0 \8 g' F- q0 N$ N8 Z* Z. [
gonadotropins.1,3
" n: `7 N) W$ K5 H0 s% X" oGonadotropin-independent peripheral preco-
: _1 E! M' z) M# e8 C2 rcious puberty in boys also results from inappropriate( ~$ l9 `4 R. \
androgenic stimulation from either endogenous or
, p& y/ c/ N& B3 l6 I- `exogenous sources, nonpituitary gonadotropin stim-, o+ D7 r3 G/ X& o
ulation, and rare activating mutations.3 Virilizing, f9 _) H) ?3 }: h [
congenital adrenal hyperplasia producing excessive2 h% e+ t& f6 U6 H6 Z8 x" p9 H. G# e
adrenal androgens is a common cause of precocious
( x# U4 g; H% D) Dpuberty in boys.3,47 ^- L! D; c: b+ {! D0 k4 y
The most common form of congenital adrenal2 c/ j! q6 s/ I% |
hyperplasia is the 21-hydroxylase enzyme deficiency.
v4 ?+ C4 Q2 P7 \* X* fThe 11-β hydroxylase deficiency may also result in8 Y" j' b7 O- r! t; D
excessive adrenal androgen production, and rarely, @& n( x0 M0 O
an adrenal tumor may also cause adrenal androgen$ f# j" ?5 D8 M8 M
excess.1,33 ~, N% N0 K& N3 |% e0 h8 }+ E7 i
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from/ O4 O" e# ]( `/ g, d* Y5 v% s# B
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
6 v. v# r Y( u, u. I' UA unique entity of male-limited gonadotropin-
4 n, A' |) `: l1 E+ l* Sindependent precocious puberty, which is also known
, Z5 p1 m' V$ N% [2 H+ S Ias testotoxicosis, may cause precocious puberty at a) m+ @6 P+ H4 t, p
very young age. The physical findings in these boys
7 E( c# o* ^/ B1 \6 ~with this disorder are full pubertal development,
2 b6 ?5 f% W e* r+ _including bilateral testicular growth, similar to boys$ H V; V: A/ O& t. L# X9 y' Y
with CPP. The gonadotropin levels in this disorder+ x* z$ K" T" L* y
are suppressed to prepubertal levels and do not show
' a$ A( }5 N0 A; l+ Zpubertal response of gonadotropin after gonadotropin-7 h7 A8 E1 t' K
releasing hormone stimulation. This is a sex-linked
1 |# G$ l9 b7 g2 p/ x* F# bautosomal dominant disorder that affects only
8 L b; p$ J |# Q* _& z+ cmales; therefore, other male members of the family
" G, v$ N# f- Q5 ^may have similar precocious puberty.3/ p- a9 B& D# x" t9 y; u: z+ K
In our patient, physical examination was incon-- p% _6 O6 C8 K1 {! h
sistent with true precocious puberty since his testi-( c! U6 o, p% n, t& n
cles were prepubertal in size. However, testotoxicosis
0 [6 t. Q4 w3 D/ u, Qwas in the differential diagnosis because his father, B& f h/ Y' E( y6 `/ z( E" ~* b
started puberty somewhat early, and occasionally,# S1 F( w" C) K% ]+ q5 R, y
testicular enlargement is not that evident in the- ?# o1 b6 l( O+ `# m
beginning of this process.1 In the absence of a neg-3 U8 m1 S% g1 e2 g* `, p. E7 z! ~
ative initial history of androgen exposure, our
" U' ]( s% b7 A: nbiggest concern was virilizing adrenal hyperplasia,
. G2 w2 D3 I4 c( v0 O9 G! Leither 21-hydroxylase deficiency or 11-β hydroxylase1 z; c2 m2 ]0 p. q
deficiency. Those diagnoses were excluded by find-
1 B* ]6 Y/ z9 G% sing the normal level of adrenal steroids.
! @- I# t, |! b2 K( }The diagnosis of exogenous androgens was strongly
9 G; ]* o, J8 a6 P4 Fsuspected in a follow-up visit after 4 months because" F% Z" g3 Q2 A5 F
the physical examination revealed the complete disap-% F) u- |( }5 K. A
pearance of pubic hair, normal growth velocity, and
2 |5 P8 {6 Z/ f9 Wdecreased erections. The father admitted using a testos-; X! q& ?0 W1 [
terone gel, which he concealed at first visit. He was
& Y$ j. y" |7 B1 e% zusing it rather frequently, twice a day. The Physicians’
8 K& a9 G0 ?+ [+ J6 E9 SDesk Reference, or package insert of this product, gel or+ u. P. a1 e3 Q1 w- D0 J$ e1 q
cream, cautions about dermal testosterone transfer to" N! U, S2 z% b+ @% A( o
unprotected females through direct skin exposure.
3 F# f; |( E3 C4 m+ ZSerum testosterone level was found to be 2 times the
1 k1 s0 _3 a M& ~baseline value in those females who were exposed to
& u% ~8 x" W5 X. b- l$ g, ceven 15 minutes of direct skin contact with their male) `! x. y( N2 D! |1 h) U1 c
partners.6 However, when a shirt covered the applica-
9 G% h& X) F& ?% e+ l8 qtion site, this testosterone transfer was prevented.
; k2 ]) S: V. U% VOur patient’s testosterone level was 60 ng/mL,. |9 t* s6 ]$ F) u k# s& ] Q; Q
which was clearly high. Some studies suggest that
: ?6 s# E$ G# {% i4 ?% udermal conversion of testosterone to dihydrotestos-
7 ~' D- q4 z9 ^, Qterone, which is a more potent metabolite, is more- ]- L2 b" K6 U8 Y# L
active in young children exposed to testosterone3 l7 Y! p$ X( ?
exogenously7; however, we did not measure a dihy-
/ m$ f3 ~1 Q3 v' H; adrotestosterone level in our patient. In addition to% _ F% K: n# i* f
virilization, exposure to exogenous testosterone in
" N' b2 _ K) Dchildren results in an increase in growth velocity and
( {4 _3 q& K1 ?% Q9 P6 Vadvanced bone age, as seen in our patient." L; g0 M. X+ v: ~6 B4 Z6 w. w
The long-term effect of androgen exposure during
+ ?. _9 k3 m9 G6 Rearly childhood on pubertal development and final
+ ?7 l) l+ u' z2 q' d" Vadult height are not fully known and always remain
5 u; U( P7 `+ Aa concern. Children treated with short-term testos-
: I {6 x4 D \# s2 `& u, Q9 uterone injection or topical androgen may exhibit some
0 [% C3 q; b( v' m- uacceleration of the skeletal maturation; however, after
- g6 Q5 h2 _( E# `4 B/ `# O4 ycessation of treatment, the rate of bone maturation' n; v' U1 ~$ g
decelerates and gradually returns to normal.8,96 v1 C# C8 b) C1 P2 P
There are conflicting reports and controversy
. M. D: f6 w0 f1 Q0 c ?. Xover the effect of early androgen exposure on adult( d5 K; ?1 k& L- W0 k. \
penile length.10,11 Some reports suggest subnormal
4 l- w; M! S' a% g5 G' g2 ?adult penile length, apparently because of downreg-
" Q, A% F/ y9 {" Bulation of androgen receptor number.10,12 However,$ X9 M; V% F8 q* ^# Q8 z
Sutherland et al13 did not find a correlation between
8 U3 K" c; U a4 pchildhood testosterone exposure and reduced adult
: Z6 D3 x: W4 Qpenile length in clinical studies.- C4 p' M1 r9 R7 } g, d5 C* j8 m
Nonetheless, we do not believe our patient is
& g" j, v# \: Y: O) k( v5 w2 o1 Ugoing to experience any of the untoward effects from
$ p( H9 y- f% q, w0 C4 d9 N3 |testosterone exposure as mentioned earlier because
' @( c' |' D3 t4 x6 Qthe exposure was not for a prolonged period of time.. A+ i) S7 R% Z
Although the bone age was advanced at the time of( ~1 \/ @7 p, z1 t/ m4 x! ?4 P
diagnosis, the child had a normal growth velocity at5 M; _1 I6 {) j1 [
the follow-up visit. It is hoped that his final adult* N) [# g; d7 j; m% g3 p2 l
height will not be affected.
! K; A. K7 ?, O5 yAlthough rarely reported, the widespread avail-5 Q, v7 F& _& q0 U' ?4 T
ability of androgen products in our society may
1 Y7 O# j$ _; N7 G2 N( j5 N7 h0 ~indeed cause more virilization in male or female
% E' f' G2 u. t6 `) V5 g1 ]' [( Zchildren than one would realize. Exposure to andro-
& q7 e3 Y- j# k0 G7 tgen products must be considered and specific ques-
, _- c$ t% P( [( vtioning about the use of a testosterone product or" N. y) i7 d; H. d
gel should be asked of the family members during
s3 U& Y! f/ b4 S$ @' Nthe evaluation of any children who present with vir-
1 L& i- x* r- `0 Jilization or peripheral precocious puberty. The diag-+ M* p6 t/ x4 B8 x9 ]
nosis can be established by just a few tests and by& U8 E, ?4 F. }! H
appropriate history. The inability to obtain such a) a5 W, f; X( P8 i; G
history, or failure to ask the specific questions, may; k9 V4 h" \ `4 N! p
result in extensive, unnecessary, and expensive8 B7 z1 F0 Q! `3 |. l- j
investigation. The primary care physician should be
# X& s# q( P" Paware of this fact, because most of these children7 z* O% o- r& c
may initially present in their practice. The Physicians’' l) A x$ M7 O4 d: t* h0 w' d! q
Desk Reference and package insert should also put a: f0 u/ Y' i0 O s
warning about the virilizing effect on a male or$ r1 b" b9 v5 s/ L' U. Y _
female child who might come in contact with some-8 L9 M" n v6 H, V7 [4 F
one using any of these products.
# S* R" Q% s( T }' b) XReferences5 E! @5 c, Y! J& R- U+ w
1. Styne DM. The testes: disorder of sexual differentiation
; z8 L4 j. ^5 {. }- h* n' q) x# a& kand puberty in the male. In: Sperling MA, ed. Pediatric+ [( q; t' T% e. W+ t0 ?7 i+ M
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
: M( B/ t Q, [7 v( ?2002: 565-628.
' Q$ n4 W% f3 e3 f1 h. U2 z2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
7 _0 |4 O9 d J: s! m3 Xpuberty in children with tumours of the suprasellar pineal
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% F6 v. f9 N* u3 T% v4 e' bareas: organic central precocious puberty. Acta Paediatr.
& T* w) v" W8 U2001;90:751-756.5 t" ~: ^/ b+ l" C+ K
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.4 E) x# a/ T% t! |
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
5 f0 w* M$ y5 B1 Z) S5 q0 E1 z: D0 C- |Dekker Inc; 2003:211-238.0 Y# I! n" @. R( e6 o
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
6 p* A* i6 \5 i1 g+ Hdevelopment in a two-year-old boy induced by topical
2 D5 P# b4 i5 L- @$ I# Lexposure to testosterone. Pediatrics. 1999;104:e23.
$ B! B6 u; ] Q5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
5 I- c; z7 ~9 ^7 @* T8 ^( oSkeletal Development of the Hand and Wrist. 2nd ed.
, T. `3 a; c* S* [! hStanford, CA: Stanford University Press; 1959.
; i- g$ v" |5 O2 H$ Q6. Physicians’ Desk Reference. Androgel 1% testosterone,
N. M; i' r* Q7 v. J2 V" j0 r! |Unimed Pharmaceutical Inc. Montvale, NJ: Medical3 e4 |2 x: e9 u4 Q
Economics Company, Inc; 2004:3239-3241.
! I+ p: ~$ Y( A: F {) g$ g7. Klugo RC, Cerny JC. Response of micropenis to topical- v9 P2 t+ a. a" O2 C9 a$ x8 w
testosterone and gonadotropin. J Urol. 1978;119:
5 e7 X' G! R! ^& q( A667-668.
5 o3 x8 l+ V0 u8. Guthrie RD, Smith DW, Graham CB. Testosterone
$ i! m; g, R" A1 w$ @) ^treatment for micropenis during early childhood. J Pediatr.
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