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is a significant concern for physicians. Central
1 w6 w) I4 [" Y' @" Lprecocious puberty (CPP), which is mediated! [, M& \, G. e, m
through the hypothalamic pituitary gonadal axis, has
; e1 r2 Q' C3 c) ~; I7 qa higher incidence of organic central nervous system1 }1 Q" L8 u( W& B& ^5 n7 g; f
lesions in boys.1,2 Virilization in boys, as manifested
& E: t; z! [7 P7 w g5 Bby enlargement of the penis, development of pubic1 g9 z$ S# b+ B. m6 k
hair, and facial acne without enlargement of testi-
( Y8 O0 z" {( v: h9 p: w7 G4 {cles, suggests peripheral or pseudopuberty.1-3 We: r9 v( A2 `+ g
report a 16-month-old boy who presented with the L3 k( I5 W" ?# a# G
enlargement of the phallus and pubic hair develop-
, Q9 a4 s6 m- Z: d; ?% ]+ U @ment without testicular enlargement, which was due
/ H7 [3 _8 {2 u( w; }* pto the unintentional exposure to androgen gel used by7 q$ K4 B L9 t y V# h. g1 l5 ]
the father. The family initially concealed this infor-; b* d" U9 V0 _3 s
mation, resulting in an extensive work-up for this
# b( \, f0 ^) i' U% S' \, Dchild. Given the widespread and easy availability of
& }+ J8 f' `. R, @testosterone gel and cream, we believe this is proba-
& w' N5 H( X7 E/ k$ S+ r$ ]8 Nbly more common than the rare case report in the5 ]' }0 x+ {+ S4 v5 O3 u
literature.4
" d" m1 Z2 F: n: v: r+ QPatient Report
7 v" y+ [) i- X: }" i- ~ s2 ]A 16-month-old white child was referred to the
0 I& O/ J/ Z( p# s" F1 m( \endocrine clinic by his pediatrician with the concern
+ b/ T9 B# V$ B6 [" H4 `of early sexual development. His mother noticed
i, y9 b- Y* A3 H4 U6 q& plight colored pubic hair development when he was
+ c* C' z' A/ U" r! O) gFrom the 1Division of Pediatric Endocrinology, 2University of/ B& i6 Y: J' d( X
South Alabama Medical Center, Mobile, Alabama.8 |7 u+ y& `9 U" P5 O
Address correspondence to: Samar K. Bhowmick, MD, FACE,
3 ]$ O. H# J$ C: H j, A8 k# mProfessor of Pediatrics, University of South Alabama, College of
4 U! y0 x5 N3 Z/ w' o5 ?) |7 rMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
& l7 x( \ n/ F+ C% ze-mail: [email protected].
6 s% [+ o: A) K/ Eabout 6 to 7 months old, which progressively became
y2 W; z9 C) W' hdarker. She was also concerned about the enlarge-7 c( c2 j& v. V! S
ment of his penis and frequent erections. The child
; ~; d" s1 N" m: c( v: Wwas the product of a full-term normal delivery, with& V7 {# E5 d3 `0 d, Z0 g7 M$ t$ W
a birth weight of 7 lb 14 oz, and birth length of
8 ?: x+ V4 b0 Y$ P20 inches. He was breast-fed throughout the first year2 L: D M- m2 c( x' ]
of life and was still receiving breast milk along with& @1 @6 Y) B' j3 F( x
solid food. He had no hospitalizations or surgery,9 q) n0 R0 {! J& b! b; ?+ }7 B
and his psychosocial and psychomotor development$ W2 \0 r! m4 C/ Y
was age appropriate.5 v6 p! N0 b/ O- ~4 p2 t
The family history was remarkable for the father,
# x* j; O' x! b- b2 lwho was diagnosed with hypothyroidism at age 16,( k# n( T. o) ]0 u
which was treated with thyroxine. The father’s/ M+ W2 ]9 ` }; t& G) F
height was 6 feet, and he went through a somewhat
& o: V. p( C, t8 T$ A9 Pearly puberty and had stopped growing by age 14.
0 I0 v$ X* [) |6 Y( HThe father denied taking any other medication. The
& N1 u. I/ Z5 Q1 j) i( v6 Qchild’s mother was in good health. Her menarche
2 G+ f. b$ ?- b4 P, S6 pwas at 11 years of age, and her height was at 5 feet& D) F* b& F% F W' w: B3 s* v
5 inches. There was no other family history of pre-
/ g0 w* {! z4 u: N0 Zcocious sexual development in the first-degree rela-7 E4 }: y m- k1 ^! n7 b
tives. There were no siblings.9 D- J2 M2 I, M3 X6 ]$ W
Physical Examination
3 n1 M+ ^) X0 Q5 i i7 nThe physical examination revealed a very active,
7 a+ \: I( c+ @+ ]* p9 [4 mplayful, and healthy boy. The vital signs documented
# w$ N% p9 c6 q8 oa blood pressure of 85/50 mm Hg, his length was
- G1 S9 j8 U1 m e; P90 cm (>97th percentile), and his weight was 14.4 kg
* Z2 X- n& W) A. t% \" L3 Q(also >97th percentile). The observed yearly growth
, g4 |: U; R/ Y$ j2 hvelocity was 30 cm (12 inches). The examination of
q. k, H/ G Z: V t& Ythe neck revealed no thyroid enlargement.
+ Z6 g @2 f, S# t* O- m9 FThe genitourinary examination was remarkable for
9 o! m/ V( b: r8 [# jenlargement of the penis, with a stretched length of, z+ D" }8 N% X6 B
8 cm and a width of 2 cm. The glans penis was very well
/ \# d& q8 r8 \. v( r1 |developed. The pubic hair was Tanner II, mostly around! O1 T& ~/ N1 e6 _2 W+ C
540' a9 n: `' u* P6 N: Q. ~
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from0 e" c' f; O; `' z5 }9 o
the base of the phallus and was dark and curled. The/ \0 t8 J2 p w7 L
testicular volume was prepubertal at 2 mL each.
9 B3 m, Q; V3 k8 YThe skin was moist and smooth and somewhat- z: x! [- \6 `( k+ t: F
oily. No axillary hair was noted. There were no
6 ]% d8 ], s3 I8 ]' pabnormal skin pigmentations or café-au-lait spots.) W9 [( S0 L- Y
Neurologic evaluation showed deep tendon reflex 2+
6 {: k3 N5 T7 _! e2 ]) Z+ Rbilateral and symmetrical. There was no suggestion3 _" {3 y- z( J7 @' h8 ~
of papilledema.
9 D0 V, r1 q9 K" [0 i6 yLaboratory Evaluation
$ c- S; }% W! m5 \- ]/ i- x" kThe bone age was consistent with 28 months by5 e- m9 R' E4 T& n6 P
using the standard of Greulich and Pyle at a chrono-
5 ?( k6 _$ k' b4 Qlogic age of 16 months (advanced).5 Chromosomal
+ U1 P$ d/ y! Skaryotype was 46XY. The thyroid function test
; N; b* i# y! M& f* i. Bshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
& z5 s) g7 n1 w3 glating hormone level was 1.3 µIU/mL (both normal).4 J O( J% ?1 @. A
The concentrations of serum electrolytes, blood7 k5 K4 r9 C' Y- [% W; O
urea nitrogen, creatinine, and calcium all were! E3 a$ C4 ^: H+ |9 _; p# [8 n
within normal range for his age. The concentration
, u+ r* C: z( L8 t L, X! Oof serum 17-hydroxyprogesterone was 16 ng/dL
' |+ s5 ^: }+ x; O/ o(normal, 3 to 90 ng/dL), androstenedione was 20
# A5 L3 p/ ~, { b5 }9 ~) eng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
; k5 |5 j1 x* E8 oterone was 38 ng/dL (normal, 50 to 760 ng/dL),
4 Y( e$ M T0 t( k7 Rdesoxycorticosterone was 4.3 ng/dL (normal, 7 to) F% Y: @5 {4 C
49ng/dL), 11-desoxycortisol (specific compound S)
2 Y0 V" m2 g% Owas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-+ o4 A9 l: Y% P. T9 i6 T- r2 m6 t- w2 H
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
2 [2 ~$ n" P8 Otestosterone was 60 ng/dL (normal <3 to 10 ng/dL),( W, g+ \: m, O! h4 G
and β-human chorionic gonadotropin was less than \9 U! s, U7 E' I/ I, M* x( p5 t
5 mIU/mL (normal <5 mIU/mL). Serum follicular
4 m+ ~8 [7 D9 K4 |; j, Bstimulating hormone and leuteinizing hormone
# t4 P; d3 F- J p0 pconcentrations were less than 0.05 mIU/mL! @$ y# y, y4 ^) y/ C' u
(prepubertal).
0 O( j2 Z% i3 l# N; e& ZThe parents were notified about the laboratory3 x% _% ]4 S* N7 }$ `
results and were informed that all of the tests were% N5 R" e$ e$ N( t$ h& t
normal except the testosterone level was high. The& u" s) q* c- \
follow-up visit was arranged within a few weeks to
: E% e' X# E, C+ P mobtain testicular and abdominal sonograms; how-
, G3 K+ R' f" eever, the family did not return for 4 months.
/ E3 h- f) S. H6 |9 A% q1 M! OPhysical examination at this time revealed that the
) t, K0 g7 h- s5 l, t& J7 i2 {child had grown 2.5 cm in 4 months and had gained
7 ?6 u. ~/ F. e5 o9 c2 kg of weight. Physical examination remained
" V) |% K/ N5 j, Vunchanged. Surprisingly, the pubic hair almost com-
; S$ a/ D" L! b/ f0 O. ~* M6 m- jpletely disappeared except for a few vellous hairs at* Z5 p* L% N1 s# q4 l- {* u
the base of the phallus. Testicular volume was still 2$ S5 [( `6 \1 B' |
mL, and the size of the penis remained unchanged.2 ~" G2 S2 n' \% ^/ X7 \; _$ d @
The mother also said that the boy was no longer hav-
% W, {; } j6 I. ~: @' Xing frequent erections.
! e" y( u. \8 J2 f) v& Y8 nBoth parents were again questioned about use of
$ d& K' n& p/ a9 x Rany ointment/creams that they may have applied to$ C) p* L& J; ~- d1 j G+ a( m
the child’s skin. This time the father admitted the; B: {' z5 G% R* B. D2 J6 [
Topical Testosterone Exposure / Bhowmick et al 541
4 B+ D' \ [8 h4 X# _1 suse of testosterone gel twice daily that he was apply-0 K+ H0 C% X. M& s$ p
ing over his own shoulders, chest, and back area for
: ?/ V; t- C9 P2 s, P8 O. }a year. The father also revealed he was embarrassed- f r& m2 }* x9 @
to disclose that he was using a testosterone gel pre-
9 e6 S' `% f8 s! J+ |: lscribed by his family physician for decreased libido
4 Z- b! u. k/ ], Q* G1 v$ Msecondary to depression.' n/ u1 M+ A( ~. g7 V' t
The child slept in the same bed with parents.+ Z7 v) G) `% R: C5 B
The father would hug the baby and hold him on his
5 ~- v. e$ l7 ?chest for a considerable period of time, causing sig-
1 p. n) Y8 X# X+ Wnificant bare skin contact between baby and father.( ^. s' I, f5 I
The father also admitted that after the phone call,
* K5 H6 j4 l0 j9 S' hwhen he learned the testosterone level in the baby
" P# d4 W J$ D: h6 a. B% ^( }was high, he then read the product information
: p X5 {0 O4 F# R5 ypacket and concluded that it was most likely the rea-5 X( ]" P; G' |; E8 n8 p
son for the child’s virilization. At that time, they+ y7 n7 R% p/ X
decided to put the baby in a separate bed, and the
/ }" K- o" j8 ^* R( `8 I5 B( h: \father was not hugging him with bare skin and had! P2 h5 p+ Z( k) K) G
been using protective clothing. A repeat testosterone" M1 f l1 d1 r- k* M
test was ordered, but the family did not go to the1 u1 R/ n8 ?% i! z6 N
laboratory to obtain the test.
/ J5 k- B) ?$ A/ e! IDiscussion
8 W# [! s0 G- a2 M1 JPrecocious puberty in boys is defined as secondary
% E# L" R2 \- `5 J9 o1 f! ~9 H( Vsexual development before 9 years of age.1,47 [; k" g7 j& q4 ~2 f3 Q
Precocious puberty is termed as central (true) when2 q# b& J9 X7 k2 ?9 N/ v
it is caused by the premature activation of hypo-1 E0 B& @* d( z9 J
thalamic pituitary gonadal axis. CPP is more com-
7 X( y2 k/ R# m: u6 Q( {mon in girls than in boys.1,3 Most boys with CPP$ w; W% h' }! v5 C. w. W
may have a central nervous system lesion that is
; r( V6 m# W- M# B# N+ W- Lresponsible for the early activation of the hypothal-
( I$ f' y) D4 `amic pituitary gonadal axis.1-3 Thus, greater empha-
$ R' U( p9 R' C& s; asis has been given to neuroradiologic imaging in/ y+ j: {6 p) G
boys with precocious puberty. In addition to viril-
6 Q8 O0 p% p& o; p* pization, the clinical hallmark of CPP is the symmet-
! f9 a7 a; Y7 y% drical testicular growth secondary to stimulation by; I+ w8 |" X \: u
gonadotropins.1,3/ d) [5 O$ L7 u4 U" L
Gonadotropin-independent peripheral preco-
5 r! |, j' X+ scious puberty in boys also results from inappropriate
: m0 w2 W2 x* o+ p# ~1 zandrogenic stimulation from either endogenous or
6 i! V) j; _3 y/ H* fexogenous sources, nonpituitary gonadotropin stim-
: T, a6 i: }- h4 A( dulation, and rare activating mutations.3 Virilizing4 T2 ~( C+ x% P" r6 f* c+ w3 [
congenital adrenal hyperplasia producing excessive
9 J! M& L, x/ F2 j& d3 kadrenal androgens is a common cause of precocious
- B( ?' _9 g2 V9 ~8 j) Kpuberty in boys.3,4
# F- E; ~/ U8 H1 x nThe most common form of congenital adrenal
9 K- `2 g0 L( @hyperplasia is the 21-hydroxylase enzyme deficiency.
2 \$ Z" J5 o6 L1 `The 11-β hydroxylase deficiency may also result in
, o" L* v0 [8 \3 u" J) |excessive adrenal androgen production, and rarely,/ t1 r2 i* P1 m! J* z$ O
an adrenal tumor may also cause adrenal androgen
7 ~ z) l0 g9 Y( }) w+ C7 G3 y/ l; Yexcess.1,3! _ p* o# X) M# M
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" C- w, t" e" v q( i; T542 Clinical Pediatrics / Vol. 46, No. 6, July 2007% p' k3 Q. g7 s# ?( m
A unique entity of male-limited gonadotropin-9 V& X- X. w' ^: Y+ B6 j! j6 S
independent precocious puberty, which is also known
2 N4 `6 |! r* y0 e& bas testotoxicosis, may cause precocious puberty at a
% I6 f6 a+ [: ^2 e& L/ @very young age. The physical findings in these boys6 n, O S8 c, p% D
with this disorder are full pubertal development,. y' r+ c: G; f( z! D
including bilateral testicular growth, similar to boys
0 k0 ^4 H; |4 w2 ^; H3 b. Gwith CPP. The gonadotropin levels in this disorder) {, H9 _* h: c, Y" s; n
are suppressed to prepubertal levels and do not show" j D8 [0 T7 ^( k* G
pubertal response of gonadotropin after gonadotropin-; R0 X: R$ ^% n4 V" [
releasing hormone stimulation. This is a sex-linked, i4 E6 R/ `7 B/ ~
autosomal dominant disorder that affects only1 V4 d5 `% [( j& r, j% Z
males; therefore, other male members of the family
; p+ f' b E3 U, o- O8 @may have similar precocious puberty.3
, F5 ? ?( F; {; M/ a. lIn our patient, physical examination was incon-/ R _, s w9 ]. j5 P ]# J+ H
sistent with true precocious puberty since his testi-6 \" s. [7 y9 T6 ?; a3 r1 v( T: B
cles were prepubertal in size. However, testotoxicosis- K2 t% U3 c; N4 b
was in the differential diagnosis because his father5 G8 \# `6 E/ s4 ~2 @
started puberty somewhat early, and occasionally,4 o9 a# ^2 x8 Q$ y5 ~" E
testicular enlargement is not that evident in the
, m# Z7 M7 @. ?+ ybeginning of this process.1 In the absence of a neg-
: [/ N6 a. A* ~/ r6 ?, o* {ative initial history of androgen exposure, our
/ K/ u( O# ?4 u* H1 abiggest concern was virilizing adrenal hyperplasia,
0 a& Q3 Y& E l \3 K* Q) `either 21-hydroxylase deficiency or 11-β hydroxylase
2 P/ L7 t, O1 C7 w( adeficiency. Those diagnoses were excluded by find-
0 Q" U q; L$ P4 n r m6 `* b+ b! E( n1 }ing the normal level of adrenal steroids.
9 V1 \ Z7 l4 D% P( \& S& ?$ [The diagnosis of exogenous androgens was strongly' q* T' s5 o; ~( K/ F
suspected in a follow-up visit after 4 months because
( M# m- f5 d) U2 Y8 Y* ~the physical examination revealed the complete disap-
0 K; E" F5 Y- Qpearance of pubic hair, normal growth velocity, and
# f7 z2 C ]9 D* Q1 r# Odecreased erections. The father admitted using a testos-
B3 V! ?& B. kterone gel, which he concealed at first visit. He was9 ~ G! i3 s& g. a
using it rather frequently, twice a day. The Physicians’
4 X3 j5 `/ B5 _6 hDesk Reference, or package insert of this product, gel or: ^. M$ t! T" L, Y4 i
cream, cautions about dermal testosterone transfer to. x {( e; V, k5 j. c; U
unprotected females through direct skin exposure.8 b; x, y2 {$ B3 n2 D1 i9 q$ u
Serum testosterone level was found to be 2 times the. r0 |4 b2 V# Q8 U. ~
baseline value in those females who were exposed to2 z0 \5 e( B9 L
even 15 minutes of direct skin contact with their male
2 N0 n& J! E0 Y/ V( x% C. _partners.6 However, when a shirt covered the applica-6 u1 Q3 B7 b0 |
tion site, this testosterone transfer was prevented.
1 @3 X8 j* g' M. [' q# w% gOur patient’s testosterone level was 60 ng/mL,
1 c6 S. ^" j/ \6 G. G Q, S: V! pwhich was clearly high. Some studies suggest that5 u# L8 _0 @6 ?( G
dermal conversion of testosterone to dihydrotestos-
! B H& w& L2 lterone, which is a more potent metabolite, is more, M" d3 {* B/ _ [8 N/ |4 n
active in young children exposed to testosterone h2 y* S/ s) S2 y3 W
exogenously7; however, we did not measure a dihy-
+ {$ |, l t% x' qdrotestosterone level in our patient. In addition to& e* c3 z6 I# S5 c' K: Y& |" n. Q
virilization, exposure to exogenous testosterone in9 G" m" ~# [/ d) `9 R( C) m$ Q
children results in an increase in growth velocity and
. n7 j$ h% v D3 U2 b5 y3 Padvanced bone age, as seen in our patient.) A6 h! {3 [$ ? l8 Q$ y# @
The long-term effect of androgen exposure during* V* J6 }. [$ y* `
early childhood on pubertal development and final
- ~6 P: r5 }* F" p* J( T) \, kadult height are not fully known and always remain Z! N0 a, M' }% H1 D
a concern. Children treated with short-term testos-
$ C0 L1 L! l. v; R0 Cterone injection or topical androgen may exhibit some8 g% F: A4 C8 D( S, V
acceleration of the skeletal maturation; however, after
3 D* v( `. g6 ^. {cessation of treatment, the rate of bone maturation( ~4 r& \+ |4 Y# ?+ o/ ^
decelerates and gradually returns to normal.8,93 |3 x. x6 t" }1 D" m$ X' A/ q
There are conflicting reports and controversy) }$ N" [8 m1 Q* e
over the effect of early androgen exposure on adult
: t7 _4 H7 U( V# ^- ^penile length.10,11 Some reports suggest subnormal
) {2 i* R- r g" g+ Badult penile length, apparently because of downreg-0 }! ~4 j7 L$ t" M
ulation of androgen receptor number.10,12 However,
( u+ O* ]; M& K4 x5 r- v1 jSutherland et al13 did not find a correlation between/ I3 u) y: K' x6 R9 Y' A
childhood testosterone exposure and reduced adult/ r5 J q) ~' x" `
penile length in clinical studies.% d# i; P; d/ \
Nonetheless, we do not believe our patient is
9 `4 B. Q. j0 @/ @0 O) q& V' [ Wgoing to experience any of the untoward effects from* Y& {$ x- H" k: N( L# G
testosterone exposure as mentioned earlier because/ I0 D" o( @/ H0 u) M. a" u
the exposure was not for a prolonged period of time.
3 I, P& C0 w# {. qAlthough the bone age was advanced at the time of
' R4 x$ }5 e3 |$ U8 Hdiagnosis, the child had a normal growth velocity at
5 j. L+ ]9 B s. c- h1 ythe follow-up visit. It is hoped that his final adult# A' Y" i- D& I3 P* u
height will not be affected.
/ d- A. N, Y5 o8 w0 G- a0 N$ |Although rarely reported, the widespread avail-, H( V# d: M7 x! A/ p& D
ability of androgen products in our society may7 G' h7 Y8 m! A0 d' T
indeed cause more virilization in male or female
# T: g% T: {$ C* d: H ^children than one would realize. Exposure to andro-
1 X; \+ X" q3 |/ i. u2 D9 rgen products must be considered and specific ques-) \9 D* t; ~/ ?/ f% V3 l9 A3 e
tioning about the use of a testosterone product or+ x" ~7 z) }6 ^2 [7 X" u2 i$ O
gel should be asked of the family members during7 R" i% G' B3 R$ x3 S
the evaluation of any children who present with vir-
2 l) g8 n0 o$ j- O# \. ^' nilization or peripheral precocious puberty. The diag-
/ F: Q$ P( t% n. Jnosis can be established by just a few tests and by5 ?5 L# T/ N; J: M' b
appropriate history. The inability to obtain such a
3 E7 Q1 c( C6 J( k7 H/ G! {history, or failure to ask the specific questions, may; O2 Q( d2 r& G$ S. N# ]
result in extensive, unnecessary, and expensive
% Z* ]) p5 ^+ ]investigation. The primary care physician should be0 f6 O% Y. V$ A* i- V
aware of this fact, because most of these children# x, \+ `& b' T6 v- _
may initially present in their practice. The Physicians’; J) O0 S( W7 h. O4 j7 J; Z) @
Desk Reference and package insert should also put a* B$ o5 K- ?- c& P/ @
warning about the virilizing effect on a male or: A: _# V3 d8 Z' r2 d) H# Y, Y- Z2 X
female child who might come in contact with some-+ j; _6 \! L9 m" K \# e" I
one using any of these products.
/ T/ L) L! Q0 |5 d! ]References
7 n1 e! c' W! r" R: c: x4 i5 t1. Styne DM. The testes: disorder of sexual differentiation4 b5 G" w, E# H1 o
and puberty in the male. In: Sperling MA, ed. Pediatric" }' V- v4 A+ n! b& X
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
5 r8 \ F. X( u; }2002: 565-628.$ E U( {3 p& i) Y+ A
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious0 p- V3 i( Y5 H) t
puberty in children with tumours of the suprasellar pineal0 H4 n1 V) \1 u
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# w& F- B+ H# a! r7 A3 Kareas: organic central precocious puberty. Acta Paediatr.
, r& p g* ]1 G0 c" T2001;90:751-756.
+ H9 G& y: [- c; R3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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Dekker Inc; 2003:211-238.
0 J; p3 \% E) n: X- [; Y' j! Q4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
" P, W- @0 o) `1 Mdevelopment in a two-year-old boy induced by topical- S# g) r4 j% a# j
exposure to testosterone. Pediatrics. 1999;104:e23.
; e t4 t' R8 P+ O5. Greulich WW, Pyle SI, eds. Radiographic Atlas of% J7 n. M) p& X' C( i" o
Skeletal Development of the Hand and Wrist. 2nd ed.: \" R8 b5 u! I
Stanford, CA: Stanford University Press; 1959.
7 \5 `: \9 R+ w- _. C/ i# }, M6. Physicians’ Desk Reference. Androgel 1% testosterone,# [/ B" n* u# [9 Q1 ~+ k' F4 l% t3 M
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Economics Company, Inc; 2004:3239-3241.
2 U& X: v% M0 H: ~7. Klugo RC, Cerny JC. Response of micropenis to topical) @# p" [" z& ^/ C' U6 l. I
testosterone and gonadotropin. J Urol. 1978;119:' N0 _+ M% V; \# u1 W
667-668./ P: p# |9 \8 `* G r0 `4 a
8. Guthrie RD, Smith DW, Graham CB. Testosterone
3 ^; r$ v& b! h3 `! |& Xtreatment for micropenis during early childhood. J Pediatr.& @( ]: H! q6 S; M
1973;83:247-252.
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