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is a significant concern for physicians. Central% ]& X4 b/ s/ ~
precocious puberty (CPP), which is mediated8 h% L( T7 g1 g+ i
through the hypothalamic pituitary gonadal axis, has4 E2 ~0 `% _3 P* o
a higher incidence of organic central nervous system" c' j3 h- _/ @, V
lesions in boys.1,2 Virilization in boys, as manifested
( |% n- V( f* M' {: S/ Gby enlargement of the penis, development of pubic' H$ s" C, Y% ?/ m( Z! U! I
hair, and facial acne without enlargement of testi-
8 i6 a: e- T1 s- c- s# B, `* Z1 Hcles, suggests peripheral or pseudopuberty.1-3 We" N {9 ~/ S0 S- M# @( o9 O/ @2 U
report a 16-month-old boy who presented with the
" Q4 w) T; E3 }% T" ?1 Cenlargement of the phallus and pubic hair develop-! p/ w2 ]) b) o: J) [4 g
ment without testicular enlargement, which was due
1 l8 V9 u F: d8 F: tto the unintentional exposure to androgen gel used by' X ?5 M- [. O! q9 S: d
the father. The family initially concealed this infor-& i' U5 J, g9 Y w4 D. q
mation, resulting in an extensive work-up for this0 H: ?* {, s* N3 V1 Y
child. Given the widespread and easy availability of. k- l5 @2 E$ L) O* u8 s8 j
testosterone gel and cream, we believe this is proba-
' F& {9 {, [( G) Kbly more common than the rare case report in the5 X/ B; \. X6 ^, j. `
literature.4
: q2 \" ~7 N5 X$ d" xPatient Report
* r4 C3 |: s0 ^- l3 QA 16-month-old white child was referred to the
9 C& x. i5 v1 V: s' X8 J; V; iendocrine clinic by his pediatrician with the concern
$ l8 X) m. ^) B7 ~. A [. fof early sexual development. His mother noticed9 {+ u% @. U- G* f* F
light colored pubic hair development when he was
6 y2 g7 z6 _. QFrom the 1Division of Pediatric Endocrinology, 2University of% t0 l) ?! R W
South Alabama Medical Center, Mobile, Alabama.
/ H0 U5 m6 b: RAddress correspondence to: Samar K. Bhowmick, MD, FACE,
* X4 M, ?' n; q4 i: \Professor of Pediatrics, University of South Alabama, College of- b) M3 v P! \
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;- L1 `" l5 n& [
e-mail: [email protected].$ `4 }1 D- @% v
about 6 to 7 months old, which progressively became
$ V5 H( v4 S, ~$ K" z+ Mdarker. She was also concerned about the enlarge-& Q8 e5 K+ F3 [
ment of his penis and frequent erections. The child
' ~/ s: s! X& t' D" M t, O7 Qwas the product of a full-term normal delivery, with
* \ ?5 w& `* j% b; Ya birth weight of 7 lb 14 oz, and birth length of+ ^/ I& }0 G/ j6 e* `) h, q$ f
20 inches. He was breast-fed throughout the first year, P& S2 ^$ J" e5 s; |
of life and was still receiving breast milk along with
* H1 ]/ g6 h& `solid food. He had no hospitalizations or surgery,
# x. `3 U8 L; O! [* b2 pand his psychosocial and psychomotor development- @2 z" l+ k6 J2 L$ w0 N* O
was age appropriate.
4 R) Q% J U+ `( mThe family history was remarkable for the father,
' j7 {% G2 z% R4 @* \who was diagnosed with hypothyroidism at age 16,, J1 L8 `6 w0 V m H
which was treated with thyroxine. The father’s. z h: f) @+ Y& K5 X$ |: T
height was 6 feet, and he went through a somewhat
: N `7 D; `& R3 r% Wearly puberty and had stopped growing by age 14.+ r7 D2 }( W+ R# D* L( D
The father denied taking any other medication. The7 |5 J0 \, G, S" q2 V6 R5 W& d
child’s mother was in good health. Her menarche
/ \8 r3 v& |2 I% \* cwas at 11 years of age, and her height was at 5 feet
* V+ h( J) S( S& ~, _/ u5 inches. There was no other family history of pre-
) o7 i: o% K" r" Y6 b& }cocious sexual development in the first-degree rela-
. @ ^# Z k3 ~: w: T% Stives. There were no siblings.) d6 H% ~+ n0 \' y3 k
Physical Examination
9 L3 }* P2 A/ x4 S+ Q$ iThe physical examination revealed a very active,& E' _* S' _# |) `# v& T$ p: ~
playful, and healthy boy. The vital signs documented3 ^, I7 H$ u0 e* T
a blood pressure of 85/50 mm Hg, his length was3 W2 b. s6 l- B& N% L
90 cm (>97th percentile), and his weight was 14.4 kg
' w% M8 ]/ s+ S(also >97th percentile). The observed yearly growth
. Z; v( c/ ]( g. H5 C2 [( Wvelocity was 30 cm (12 inches). The examination of
) [" [6 n+ M8 q" uthe neck revealed no thyroid enlargement.$ ^* w0 E4 j# I0 i8 z
The genitourinary examination was remarkable for
2 d& J" V4 u, w8 [enlargement of the penis, with a stretched length of$ z- \1 S! V! w6 ?- f+ B4 i5 s& k
8 cm and a width of 2 cm. The glans penis was very well
2 K8 V4 ]$ A& F5 ~6 u+ j( Adeveloped. The pubic hair was Tanner II, mostly around
+ A& N( E+ P) R0 i" W& A540/ @# F# h- D$ r: D
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
9 p0 i- J2 }6 hthe base of the phallus and was dark and curled. The, q# [- `5 M5 y
testicular volume was prepubertal at 2 mL each.
: r" x! y9 }+ y$ X6 o. b, }The skin was moist and smooth and somewhat
( e4 g) V9 R: p- Y* ~oily. No axillary hair was noted. There were no
3 P% `" X$ \8 u/ C- P! k7 p6 Oabnormal skin pigmentations or café-au-lait spots.
- G4 P5 h- Q- p7 I1 F( kNeurologic evaluation showed deep tendon reflex 2+
& C6 ^6 I! A# B: gbilateral and symmetrical. There was no suggestion5 ^4 |' y4 d c0 F
of papilledema.
5 l! J1 G9 Y& u g* xLaboratory Evaluation. U- W/ d' b4 Z/ \1 f3 h
The bone age was consistent with 28 months by
! i3 I# a0 e! @& m1 f% g' f/ c, Susing the standard of Greulich and Pyle at a chrono-4 k) x# J' H' d6 s$ m D$ v
logic age of 16 months (advanced).5 Chromosomal5 e& w' g0 }1 ]2 X7 @/ m
karyotype was 46XY. The thyroid function test& ^* J3 m( _' H @! r+ H
showed a free T4 of 1.69 ng/dL, and thyroid stimu-0 i8 U6 `! ?9 O- z$ m2 Y1 E3 K- @
lating hormone level was 1.3 µIU/mL (both normal).9 ?# s& R( j; L. H& d
The concentrations of serum electrolytes, blood
/ g- F) p7 F3 L7 _$ _urea nitrogen, creatinine, and calcium all were
3 m. ?4 [$ d/ p" s" b. V3 X% cwithin normal range for his age. The concentration
( u5 q( j# n& I' B' t4 Iof serum 17-hydroxyprogesterone was 16 ng/dL
+ z9 |4 r4 X1 ~(normal, 3 to 90 ng/dL), androstenedione was 20
2 n# g" u2 t" x0 hng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
" z, @8 \! b( q# _1 Fterone was 38 ng/dL (normal, 50 to 760 ng/dL),( P# Q; s6 B- b C
desoxycorticosterone was 4.3 ng/dL (normal, 7 to+ I0 J" s& d4 D" Y1 B% Q/ f; z
49ng/dL), 11-desoxycortisol (specific compound S)
' o! g9 }$ c3 z5 W s; S. Uwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-/ R- {& x4 f; p0 f
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total) C( @% ^0 D2 c( V
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
2 }" V1 r, F& x! f! \* v9 z! Sand β-human chorionic gonadotropin was less than* f* }8 f+ L5 {3 r9 W# ?: ~% M
5 mIU/mL (normal <5 mIU/mL). Serum follicular
0 Q" @& \- v& h% Cstimulating hormone and leuteinizing hormone
1 k0 K0 |/ S, X- uconcentrations were less than 0.05 mIU/mL
& V7 U7 C A, y Y(prepubertal).8 Q: O _7 ?& t' k1 l
The parents were notified about the laboratory4 S. I% j5 E$ C- \: e9 i! R5 F) a5 C
results and were informed that all of the tests were% C: A; f- D/ l3 W) f1 L$ J
normal except the testosterone level was high. The
, k0 e# Y: R7 k) Y! z1 w6 qfollow-up visit was arranged within a few weeks to
: ` R1 b% J8 }2 H( f' j$ Sobtain testicular and abdominal sonograms; how-2 I- x F. a9 V( i* A
ever, the family did not return for 4 months.
) y5 O i8 j$ I; X4 U) f2 R( V+ C" E. ]Physical examination at this time revealed that the
. r C+ D% v8 \% cchild had grown 2.5 cm in 4 months and had gained
8 j7 K7 |! w0 B- A+ N: o9 H. u8 H' X2 kg of weight. Physical examination remained8 @! X/ M2 n; {
unchanged. Surprisingly, the pubic hair almost com-
5 I- Q: U; |( J8 Spletely disappeared except for a few vellous hairs at
, g+ P6 X9 U! F6 J5 wthe base of the phallus. Testicular volume was still 27 p' P2 T7 f% D6 X) B I: T
mL, and the size of the penis remained unchanged.
( }; M2 [8 S' t1 N8 e9 F. VThe mother also said that the boy was no longer hav-
' s3 G; t% q; Ning frequent erections.: b! W* S( Q; R) p! c9 J
Both parents were again questioned about use of
+ Z K0 i) A9 hany ointment/creams that they may have applied to+ B6 U3 M8 V; Z4 c8 H( X/ L# q
the child’s skin. This time the father admitted the
! I; f+ x" c. Z5 v& KTopical Testosterone Exposure / Bhowmick et al 541: i2 Q4 B r& ^5 q& z
use of testosterone gel twice daily that he was apply-5 S' w: o$ g5 ]5 l( P2 j
ing over his own shoulders, chest, and back area for
5 P' _" R" @6 U& y% k6 t) Pa year. The father also revealed he was embarrassed
0 D" K* D. d+ |) c+ z- i+ tto disclose that he was using a testosterone gel pre-
: y/ J5 u+ ]) a/ \ W8 Jscribed by his family physician for decreased libido
. q4 I+ Y# |5 w. k; B; _9 c0 h% ksecondary to depression.
; X2 Z' ~2 b6 i8 L# j6 \: ZThe child slept in the same bed with parents.% f4 W6 P7 w O. o8 ? A' E8 ?) `
The father would hug the baby and hold him on his
1 O; Z$ S. h/ Gchest for a considerable period of time, causing sig-. @9 J ^( a; k! O7 k
nificant bare skin contact between baby and father.9 y) P6 p. C m4 Q
The father also admitted that after the phone call,+ W0 y" {) w3 a9 ]; A- F0 K2 b
when he learned the testosterone level in the baby. m+ S) R& o7 P$ F; K
was high, he then read the product information
( u1 r/ C9 S: C. z* Y# o- Qpacket and concluded that it was most likely the rea-4 B) Q& y. i: w% y( S
son for the child’s virilization. At that time, they& [6 p9 r) V+ a; A7 s& [7 M p4 F
decided to put the baby in a separate bed, and the; o4 t7 f$ D; H* w; b+ t3 N
father was not hugging him with bare skin and had9 ]* `/ q8 k: N+ I
been using protective clothing. A repeat testosterone+ l# M! H5 \3 W
test was ordered, but the family did not go to the
4 p' y- u7 N! ]* M# Y. i3 \) plaboratory to obtain the test.
, Z9 _9 w1 g' S: ]$ i( @8 `Discussion) A! ?( z3 s# H3 s# C, x) s- H
Precocious puberty in boys is defined as secondary0 Z+ r: e$ q4 N, u: d7 j
sexual development before 9 years of age.1,4/ F/ ~ L8 I* ]. `% v" [: Z
Precocious puberty is termed as central (true) when3 d' S% ~5 P3 T8 i3 ~ S0 z
it is caused by the premature activation of hypo-
+ v- S5 \1 a" @2 i M) lthalamic pituitary gonadal axis. CPP is more com-
) d* Y6 P4 {( w" V! G' \mon in girls than in boys.1,3 Most boys with CPP; o3 l* J2 q1 Z2 t* y9 g
may have a central nervous system lesion that is. ]9 E$ m( S: e+ Z
responsible for the early activation of the hypothal-" Z/ B7 V6 p+ c/ z
amic pituitary gonadal axis.1-3 Thus, greater empha-; v5 B1 [3 B# J$ \# T* d
sis has been given to neuroradiologic imaging in
+ d+ a+ T; F9 @; ]7 D: _) I2 L9 Tboys with precocious puberty. In addition to viril-
: F% X9 B& T. D8 S8 m8 V) _2 Aization, the clinical hallmark of CPP is the symmet-" k: }* h5 P: O0 L1 u
rical testicular growth secondary to stimulation by
' Z4 z4 S/ Q; d8 U/ N( {0 Cgonadotropins.1,34 Y j2 h J+ d# ?0 x
Gonadotropin-independent peripheral preco-0 T, S/ n, [' q: y2 b
cious puberty in boys also results from inappropriate8 G4 M/ N/ p5 n9 X' G
androgenic stimulation from either endogenous or6 X* e, l$ S5 a8 {$ p) }
exogenous sources, nonpituitary gonadotropin stim-
# G) Y; }* W; t4 Y: u, Gulation, and rare activating mutations.3 Virilizing
1 s: M" M# b9 _congenital adrenal hyperplasia producing excessive
. a( Q$ N$ N; F9 |adrenal androgens is a common cause of precocious
; N+ m5 k0 e% ipuberty in boys.3,4: v3 W& V, k4 @0 n+ R7 Y
The most common form of congenital adrenal1 S' c5 C$ s$ E7 p6 r
hyperplasia is the 21-hydroxylase enzyme deficiency.* @; Q% j4 Y, X1 g+ F* F+ y
The 11-β hydroxylase deficiency may also result in. T. n d3 r& J: k) z) t: u9 r5 Z. |
excessive adrenal androgen production, and rarely,. Q" }3 H0 S, g. K7 ~0 O/ _; ^
an adrenal tumor may also cause adrenal androgen, `# r5 t. C# [1 g7 Q) \
excess.1,3- G: Q8 P7 W8 N' ^* N7 F
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from- M2 |0 y! y- I* v
542 Clinical Pediatrics / Vol. 46, No. 6, July 20075 k( c3 J/ Y* k1 }
A unique entity of male-limited gonadotropin-
0 q6 c0 Z+ ~; P; aindependent precocious puberty, which is also known
1 w7 ~% X9 Q+ f# Yas testotoxicosis, may cause precocious puberty at a
8 V2 P! o7 p* U' M( ^# h; A% o0 Lvery young age. The physical findings in these boys
- r+ T; m: K: Hwith this disorder are full pubertal development,: W2 i" @: l s/ _/ v( b' K5 R8 c
including bilateral testicular growth, similar to boys J* r- h; l4 `/ ^9 m7 f( X
with CPP. The gonadotropin levels in this disorder* ^5 D# B+ U& q2 G
are suppressed to prepubertal levels and do not show
+ i4 R: W# {: e2 ^- Bpubertal response of gonadotropin after gonadotropin-$ E \- D8 I3 [
releasing hormone stimulation. This is a sex-linked2 |; F3 @, O- ^( c: Z
autosomal dominant disorder that affects only
7 M% c ]! A; amales; therefore, other male members of the family% r+ j- K2 f, \
may have similar precocious puberty.3
" K+ L+ o7 s7 E/ hIn our patient, physical examination was incon-
* G0 W6 p+ A/ @sistent with true precocious puberty since his testi-
, R1 q$ ?* h: k. C. w" v& gcles were prepubertal in size. However, testotoxicosis" M( S2 _ o7 \/ E1 Q
was in the differential diagnosis because his father
6 n, T& z9 q5 I) i4 o& Q' c! Tstarted puberty somewhat early, and occasionally,
8 ~1 v# e4 S9 G0 i7 p) ltesticular enlargement is not that evident in the n4 Y7 `$ Y' T; |' K1 f) F
beginning of this process.1 In the absence of a neg-
' E6 N+ f- Q( V! x( h4 [% C* gative initial history of androgen exposure, our
1 u3 s$ I/ K3 X* d6 Ubiggest concern was virilizing adrenal hyperplasia,' \- i1 e0 L0 z8 R+ C
either 21-hydroxylase deficiency or 11-β hydroxylase
# O* r/ t" {% _$ c+ h# \deficiency. Those diagnoses were excluded by find-
: D$ e! i; a+ Jing the normal level of adrenal steroids.
4 ]; i) D& O0 |6 bThe diagnosis of exogenous androgens was strongly
# g/ Z |. k9 msuspected in a follow-up visit after 4 months because
, a& \) _1 R; f5 U/ g& F# G! sthe physical examination revealed the complete disap-
5 ^- a) S& h! {pearance of pubic hair, normal growth velocity, and
3 W& n: D% t9 y" [* U. S3 \decreased erections. The father admitted using a testos-
5 N3 Y" L& t. R% O P9 z4 [terone gel, which he concealed at first visit. He was g/ w. r A0 O% |3 c9 z
using it rather frequently, twice a day. The Physicians’
8 p: ^3 ?- `2 d6 cDesk Reference, or package insert of this product, gel or
+ d7 e/ S O/ }/ w, x7 ~1 pcream, cautions about dermal testosterone transfer to
; t* V9 G* W$ x' b( F T Qunprotected females through direct skin exposure." E K1 H0 |0 |
Serum testosterone level was found to be 2 times the
6 v- Q8 s. M# J6 [9 R P* }9 Sbaseline value in those females who were exposed to: ~; D7 r" V; L9 o4 `
even 15 minutes of direct skin contact with their male, S( B# U" i5 d& A A1 L
partners.6 However, when a shirt covered the applica-
/ ~+ ~0 m' j7 ation site, this testosterone transfer was prevented. @8 t% S- b& a/ r( C
Our patient’s testosterone level was 60 ng/mL,
5 N. P& F9 u9 |; V- Gwhich was clearly high. Some studies suggest that' a) l }* j4 K2 P
dermal conversion of testosterone to dihydrotestos-3 f" d& \# M% X7 ?
terone, which is a more potent metabolite, is more% A% ~/ b+ `& H' [7 a
active in young children exposed to testosterone: P" ~" z/ i/ p N4 q k( J
exogenously7; however, we did not measure a dihy-
( v6 n; k6 r2 G# Udrotestosterone level in our patient. In addition to
0 T6 G$ J) z1 N: avirilization, exposure to exogenous testosterone in( l! X! H, y- B
children results in an increase in growth velocity and: J5 F1 I; p8 i- B
advanced bone age, as seen in our patient.' {4 ?5 _) n, z. W, V! a
The long-term effect of androgen exposure during0 i) \( W- M" [, e, z$ \
early childhood on pubertal development and final
' l& B* Z( d$ o- I1 N1 I: I( Tadult height are not fully known and always remain: W5 g8 N5 i- O2 x+ A5 C1 |: W
a concern. Children treated with short-term testos-
& ?7 O# K2 W* \' [terone injection or topical androgen may exhibit some! z1 j0 s8 r0 v4 s
acceleration of the skeletal maturation; however, after4 T4 B r: d9 C/ `
cessation of treatment, the rate of bone maturation0 h8 M) L' o& }
decelerates and gradually returns to normal.8,9
3 \" @+ L3 d4 ^; x/ kThere are conflicting reports and controversy4 g2 Y1 Z! [, ^- {0 O9 f; J
over the effect of early androgen exposure on adult v6 z+ _% H# A% j7 \& c
penile length.10,11 Some reports suggest subnormal2 n ]6 a: f0 {, O: Q) N
adult penile length, apparently because of downreg- v; R Q- j! m3 x1 k
ulation of androgen receptor number.10,12 However,4 x+ M, G2 {$ S$ E0 L
Sutherland et al13 did not find a correlation between+ Z1 D# A8 \. M! f6 q: ?, u
childhood testosterone exposure and reduced adult
' y4 I" E& o' c/ ?/ \) P/ s& \penile length in clinical studies.# v3 Z8 d( @! q
Nonetheless, we do not believe our patient is
7 Q3 r9 I$ y, D% d; \$ q" egoing to experience any of the untoward effects from
1 W7 K6 z# }: l5 j" T% X' {+ Wtestosterone exposure as mentioned earlier because
' I& ]$ k6 {1 e+ }' W" E' `( S7 kthe exposure was not for a prolonged period of time.- I4 [2 }9 R/ j* I* W% w) B
Although the bone age was advanced at the time of
4 \8 L; t* O3 D) ?diagnosis, the child had a normal growth velocity at
6 U# r q/ \4 r4 E, x3 H$ Uthe follow-up visit. It is hoped that his final adult' K7 c& E5 `7 x6 U- M v" b1 u
height will not be affected.
$ N" E8 t. ^- n P4 g" R1 mAlthough rarely reported, the widespread avail-
8 K2 k4 t; F) ~4 a7 q: ~ability of androgen products in our society may0 j8 g5 B% |) ~3 i/ ]
indeed cause more virilization in male or female8 M! n% @; k% B4 L2 d2 }* Z
children than one would realize. Exposure to andro-
3 U4 O: [* t9 H, o9 y! R( B9 Ugen products must be considered and specific ques-! T; S' ~) H5 D$ E. l! e
tioning about the use of a testosterone product or
" ~9 b" p4 H7 Xgel should be asked of the family members during7 Q! ~' Y: x" E. Y, \
the evaluation of any children who present with vir-! ~1 [9 ~2 M) v$ M9 z
ilization or peripheral precocious puberty. The diag-: h+ z0 b9 i4 G) N* r6 H2 h' [
nosis can be established by just a few tests and by
: u9 w+ L* G! |* C6 Rappropriate history. The inability to obtain such a, [8 m3 m: \& p3 ^0 {* T
history, or failure to ask the specific questions, may$ ^6 K, J4 z1 N7 M! |
result in extensive, unnecessary, and expensive
- g6 O) G0 u* W1 dinvestigation. The primary care physician should be# u0 A1 |2 J) ?# i7 @ z
aware of this fact, because most of these children
2 [8 D6 T; c/ i- F( p7 u" h7 Emay initially present in their practice. The Physicians’
+ [& P7 X4 K7 G `+ ]Desk Reference and package insert should also put a: u/ c" I. j9 _4 ]7 S0 G
warning about the virilizing effect on a male or% B3 n7 I. q+ I* @0 q7 A0 c
female child who might come in contact with some-
" s; b) T$ P+ F# y- k ?" Hone using any of these products.
& i7 q1 h$ ~9 ^References: s. A0 f2 \: k/ q
1. Styne DM. The testes: disorder of sexual differentiation) R( a8 e6 i B9 Q
and puberty in the male. In: Sperling MA, ed. Pediatric
& R5 |. @' a' J! Z' S: cEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
; r9 V7 K- n0 |, i P( q. u3 O5 ?; T; G2002: 565-628.
7 Y3 l" M! t. h5 s8 M2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
8 h$ ^* j* Z* F+ [0 q9 ^( |5 fpuberty in children with tumours of the suprasellar pineal" Q8 k, p( ~! X4 \' u
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
/ ]; ?8 X2 F8 d! t( o$ O0 ^Topical Testosterone Exposure / Bhowmick et al 543
8 D- ^" t5 _9 D4 p, F& nareas: organic central precocious puberty. Acta Paediatr.
+ b. g9 _( a- q4 U) m. Q+ Y @# p @2001;90:751-756.$ t8 Q ?8 q0 O6 A+ F
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
: H K* @4 Q# c" v \% A2 W4 ~- X/ RPediatric Endocrinology. 4th ed. New York, NY: Marcel% s b3 g/ n4 H9 P0 V7 T j9 Q0 u/ {
Dekker Inc; 2003:211-238.: e* P8 p4 F6 { L i9 F9 B. I
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
+ y1 u l u. R9 b3 h/ ?development in a two-year-old boy induced by topical
" J: G& p) S; D6 i: ?; sexposure to testosterone. Pediatrics. 1999;104:e23.6 z0 N* R$ D: [6 u) \, i. n I7 m
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of) t* n- J) M) {& e% I/ [/ k, b7 `& [
Skeletal Development of the Hand and Wrist. 2nd ed.( c7 m4 n7 K' \5 u# `% m/ I. j
Stanford, CA: Stanford University Press; 1959.) `/ p8 S+ g& P
6. Physicians’ Desk Reference. Androgel 1% testosterone,
& u2 ^* t1 F1 a/ V& K% BUnimed Pharmaceutical Inc. Montvale, NJ: Medical% |9 `. t8 G" N
Economics Company, Inc; 2004:3239-3241.# }. y( V' ~8 p3 w! v4 }
7. Klugo RC, Cerny JC. Response of micropenis to topical
9 A* M# {, j2 _testosterone and gonadotropin. J Urol. 1978;119:
/ `& K7 ]( L3 F667-668.2 M6 o" ], U# z. P
8. Guthrie RD, Smith DW, Graham CB. Testosterone% d% Z8 ?1 |# ^9 C3 c
treatment for micropenis during early childhood. J Pediatr.0 n' B3 `' M. H
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