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is a significant concern for physicians. Central; J! i7 w3 e- c: U& }
precocious puberty (CPP), which is mediated/ h2 l/ [7 e5 ~ \5 Y- a1 i
through the hypothalamic pituitary gonadal axis, has' \2 X! }" E/ ]' ]7 @. s" J
a higher incidence of organic central nervous system+ b0 C+ N, r' p+ G( T
lesions in boys.1,2 Virilization in boys, as manifested2 Q) v7 r7 f9 N* d
by enlargement of the penis, development of pubic
: D# A( g2 L! L' g6 Q5 Bhair, and facial acne without enlargement of testi-. G8 B1 Q2 N; U6 P
cles, suggests peripheral or pseudopuberty.1-3 We
! X9 s( {3 ?2 L) W( Freport a 16-month-old boy who presented with the9 r2 c! I$ W' _$ c+ t+ |; H
enlargement of the phallus and pubic hair develop-
" o% m! b& N7 h, gment without testicular enlargement, which was due
5 _- O& U% F, ^) p' F9 Oto the unintentional exposure to androgen gel used by8 o3 O; {1 b! q2 ^( f
the father. The family initially concealed this infor-
! {* Q6 D. v/ Y$ f' v* ymation, resulting in an extensive work-up for this# `7 `6 z2 X, O: l% |* o4 G& l. H
child. Given the widespread and easy availability of
; h" p( P8 D* H' qtestosterone gel and cream, we believe this is proba-
$ `& l$ r. h+ F! c; Ebly more common than the rare case report in the
0 _. y; D) M% Fliterature.4* _& D' }7 ]9 Q$ n+ X+ R
Patient Report2 J2 N$ t% e$ q" ]7 P# K
A 16-month-old white child was referred to the$ _+ V4 W- \! E# G6 F
endocrine clinic by his pediatrician with the concern5 R/ F! h9 p, E
of early sexual development. His mother noticed8 L6 D* x) Q7 c' \' w; \
light colored pubic hair development when he was
' R' L! g" P0 ^2 vFrom the 1Division of Pediatric Endocrinology, 2University of6 b+ `5 n) e0 }6 X+ O9 s
South Alabama Medical Center, Mobile, Alabama.
# b4 p; ^1 W" O* M. [Address correspondence to: Samar K. Bhowmick, MD, FACE,7 O5 q- ?' }2 z- R6 a8 O
Professor of Pediatrics, University of South Alabama, College of
- ?' [! T2 k: I* i" ~- t B `3 \) P3 aMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
& k5 v! d8 \$ t9 Z0 ~e-mail: [email protected].
# s3 k8 J) i: O0 Iabout 6 to 7 months old, which progressively became
8 A" w' h1 F4 j7 V* z5 ?! E: p# X- Sdarker. She was also concerned about the enlarge-" T! s: L1 i$ g% N5 g' t
ment of his penis and frequent erections. The child
! E9 s* g( q; u! }was the product of a full-term normal delivery, with% F; ]. F, o5 J3 }- @
a birth weight of 7 lb 14 oz, and birth length of
+ z. i' G3 O2 p/ F0 }: ]20 inches. He was breast-fed throughout the first year
1 `& |( w( A, p6 a3 v4 |of life and was still receiving breast milk along with
& `1 N# O& L; |- X& _solid food. He had no hospitalizations or surgery,1 i6 O" j d9 N8 o4 O0 v* J
and his psychosocial and psychomotor development" r8 B. i; {$ @" m& K1 L% N
was age appropriate.
: N+ J% ]/ m! \! w8 K6 E/ I9 AThe family history was remarkable for the father,9 ~4 e" d- i4 M: K6 Z+ Y+ U$ g0 }
who was diagnosed with hypothyroidism at age 16,
. |, e- y$ F- b4 Fwhich was treated with thyroxine. The father’s( H, \2 z* z4 l2 c1 u+ f
height was 6 feet, and he went through a somewhat
2 g, B4 s; [; ~0 U" s' J3 zearly puberty and had stopped growing by age 14.
; V" i, B) E: t& qThe father denied taking any other medication. The
/ g$ m5 T) c4 C1 ychild’s mother was in good health. Her menarche
: k: L9 b6 D1 ]% Dwas at 11 years of age, and her height was at 5 feet" S% X, D: ~: ?% a" U" ^" R, G5 {
5 inches. There was no other family history of pre-7 E# _/ J; v1 H* |0 b
cocious sexual development in the first-degree rela-
( w; Q x! \' e S$ Atives. There were no siblings." V( E3 f- d* a: ^" O* L# Z
Physical Examination
! Y, O7 ]5 v9 e k2 lThe physical examination revealed a very active,
& a1 i( w ^ O% f- A% Wplayful, and healthy boy. The vital signs documented
( A8 S% d4 F$ ?2 N# y/ L$ Pa blood pressure of 85/50 mm Hg, his length was* s, `: o9 M7 B. P' U' i2 o# n7 d
90 cm (>97th percentile), and his weight was 14.4 kg- Q" g" W# e5 }/ j* R
(also >97th percentile). The observed yearly growth$ ^: {" g2 p$ Q3 K* ]# Z
velocity was 30 cm (12 inches). The examination of0 [, \: K2 i8 ^8 t
the neck revealed no thyroid enlargement.$ X; y$ ^" m8 K
The genitourinary examination was remarkable for" Y0 H. S0 `8 [5 A
enlargement of the penis, with a stretched length of
6 h# p( g# T0 i7 n9 F6 U8 cm and a width of 2 cm. The glans penis was very well1 I/ o1 i8 a) L7 t" F; H
developed. The pubic hair was Tanner II, mostly around2 p+ S" _+ q* Y$ _
540
4 G1 A; j/ {2 o& O+ o1 E) [at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! G7 N+ s; S9 b8 u$ b( {: S
the base of the phallus and was dark and curled. The
" [$ A+ g9 l0 w7 G( l+ i( Rtesticular volume was prepubertal at 2 mL each./ U4 u a& L2 }% {
The skin was moist and smooth and somewhat
/ L! }0 o: q2 | F/ `oily. No axillary hair was noted. There were no
$ ~! q3 u5 J7 f/ `! A! _* ^abnormal skin pigmentations or café-au-lait spots.5 [4 @, }# N% @6 Y9 Z
Neurologic evaluation showed deep tendon reflex 2+
7 I+ q/ s( w$ A4 j: fbilateral and symmetrical. There was no suggestion3 K: V; q. i- q
of papilledema.
6 G9 v2 n4 A+ E3 }8 m5 B x+ ELaboratory Evaluation2 a/ C9 S6 q9 F) ]
The bone age was consistent with 28 months by
/ Q1 j, d; U+ U! Ousing the standard of Greulich and Pyle at a chrono-
5 @) k6 T0 N5 elogic age of 16 months (advanced).5 Chromosomal. [$ Y* h: n( \# J
karyotype was 46XY. The thyroid function test/ a% m' t# I/ D- Y
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
! o1 Z& W/ ^# l0 F2 H/ |lating hormone level was 1.3 µIU/mL (both normal).( [9 N9 S6 q* A9 D
The concentrations of serum electrolytes, blood
( g7 n( U) P& |# uurea nitrogen, creatinine, and calcium all were% J5 y ^. J$ w+ ~! k E
within normal range for his age. The concentration
9 ~1 D$ J& p. u# B8 Oof serum 17-hydroxyprogesterone was 16 ng/dL& W$ c! B! o8 {7 j0 R, W) Q
(normal, 3 to 90 ng/dL), androstenedione was 20/ K. U& `3 w% W- ^; }3 w6 f r+ W: E
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-) |* Q! }& b, R2 n; v1 Z. D$ Y" y7 m
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
+ o% Z0 O' y3 K" v+ C$ sdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
% d3 c) z3 c+ i! ]$ ~, m49ng/dL), 11-desoxycortisol (specific compound S)
: n+ Q2 {0 }' G ~+ [was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-# y: O# ]" o- V
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
' |& H. I7 L5 W/ h, _( N5 stestosterone was 60 ng/dL (normal <3 to 10 ng/dL),, j$ z8 \% U' r
and β-human chorionic gonadotropin was less than
, O& M+ K" H5 I5 R5 mIU/mL (normal <5 mIU/mL). Serum follicular" ]' B4 I0 c: k- T7 h+ W7 }" X
stimulating hormone and leuteinizing hormone7 m: E) {8 N7 r) {
concentrations were less than 0.05 mIU/mL
^' W7 w4 m+ B! b, I(prepubertal).' {' T$ s/ ?* G! G. N0 a! B$ g
The parents were notified about the laboratory
/ q% k- f' L: U6 |6 }) [+ l. v' Hresults and were informed that all of the tests were
+ e2 u! |: E8 ?) ~normal except the testosterone level was high. The
% t* v6 o6 c3 C( r: vfollow-up visit was arranged within a few weeks to- V/ x( o' C' _4 Z1 p) @ Z
obtain testicular and abdominal sonograms; how-
" w/ N9 I; |& J/ x2 y3 z& zever, the family did not return for 4 months.% |5 b% ~4 I, ~0 c, j* q S2 f
Physical examination at this time revealed that the9 } q+ c9 R: p$ W
child had grown 2.5 cm in 4 months and had gained h& ?" }' f' O/ v U& s
2 kg of weight. Physical examination remained
0 O' k( J5 \* ?' dunchanged. Surprisingly, the pubic hair almost com-
" ^; X: m' [2 B; ]- tpletely disappeared except for a few vellous hairs at8 u2 s/ ^, m0 n, K
the base of the phallus. Testicular volume was still 2$ a" b5 h9 b' z+ l1 |
mL, and the size of the penis remained unchanged.: a& A2 J$ p. T n4 l+ E ~# n+ [- C
The mother also said that the boy was no longer hav-/ U; r% A( v3 X b
ing frequent erections.3 ~/ W3 V _* M' F& e; a
Both parents were again questioned about use of# A! I! ^* h, O% s
any ointment/creams that they may have applied to8 K! k- U; a* R; R
the child’s skin. This time the father admitted the
2 t2 c0 M) J5 gTopical Testosterone Exposure / Bhowmick et al 5418 G7 P2 D( ^+ c$ G. g) f+ K; g
use of testosterone gel twice daily that he was apply-
$ N5 |/ G8 X+ n# E3 Ving over his own shoulders, chest, and back area for0 w' X$ C. g# A1 F+ G
a year. The father also revealed he was embarrassed9 G2 |1 W! T) h7 |) R
to disclose that he was using a testosterone gel pre-
7 _$ @, u2 p- ~" L% S! ?, D" \scribed by his family physician for decreased libido* } r4 O) X6 Z" g$ c
secondary to depression.
8 I/ N" t0 i" l: j# A! VThe child slept in the same bed with parents.- K: |+ X' s$ d3 e. u9 P1 @( a
The father would hug the baby and hold him on his
+ y' _1 U& L) Qchest for a considerable period of time, causing sig-. c' |, K1 m3 b/ p; Z
nificant bare skin contact between baby and father.
$ e% t3 f4 [* I Q% Y8 T8 \& w: VThe father also admitted that after the phone call,+ r+ f2 Q7 b" m2 W9 L
when he learned the testosterone level in the baby
) Y0 p9 m0 a3 Q! m2 e u" C& fwas high, he then read the product information
) r# ?9 M# B! v& K* Z1 q5 _0 Qpacket and concluded that it was most likely the rea-
- @' Y) W% h- i9 C# n9 _. H6 x2 Fson for the child’s virilization. At that time, they5 `3 I" }7 H. p b# Q' _) U
decided to put the baby in a separate bed, and the
4 B8 f+ b) ?3 C; ^% [, @father was not hugging him with bare skin and had
+ z: m$ Z# f. B: l% K+ K. X! Cbeen using protective clothing. A repeat testosterone- J" s G0 h0 c; Z
test was ordered, but the family did not go to the
5 p6 u2 ~$ b4 U) Wlaboratory to obtain the test.+ H# e: g2 ~3 E0 c7 a0 a5 g
Discussion+ C# [ V: p; X+ [
Precocious puberty in boys is defined as secondary9 a" B" s. E; b! O
sexual development before 9 years of age.1,4
3 L2 S$ n& Z& V( {Precocious puberty is termed as central (true) when
6 m" z3 k& D( Cit is caused by the premature activation of hypo-
7 \ X, T4 @: c+ _% @. Jthalamic pituitary gonadal axis. CPP is more com- Q! _+ T; A& K
mon in girls than in boys.1,3 Most boys with CPP1 t2 r2 ]; I x/ O6 `
may have a central nervous system lesion that is
8 S& l+ D3 q" }* lresponsible for the early activation of the hypothal-" {! } Z4 G3 M8 {, T4 [/ ~7 B
amic pituitary gonadal axis.1-3 Thus, greater empha-
" C1 C3 y# w0 S W: Lsis has been given to neuroradiologic imaging in6 N* w k4 S1 L& @0 Q D f' ~5 F
boys with precocious puberty. In addition to viril-, M" H5 g$ Q1 W( o0 I7 ~* w
ization, the clinical hallmark of CPP is the symmet-
" }& z0 E7 p; {) J% Q0 drical testicular growth secondary to stimulation by
8 m) @' \# Y( |0 P8 @1 n6 qgonadotropins.1,3
7 k8 H0 ?( r0 o. q ]4 z( @Gonadotropin-independent peripheral preco-' ~2 W+ E: @8 |9 l! \( u
cious puberty in boys also results from inappropriate* U, a9 Q% g0 K
androgenic stimulation from either endogenous or
2 E, T7 X K5 L4 `+ bexogenous sources, nonpituitary gonadotropin stim-
* Q! F. a5 P8 L, x2 ~# zulation, and rare activating mutations.3 Virilizing2 S/ Y) U/ \" y! T' \# Z4 Z$ S
congenital adrenal hyperplasia producing excessive: S7 w$ E. E, q
adrenal androgens is a common cause of precocious
& h0 a7 M6 f0 M! U9 ~- J) i+ X2 N6 Kpuberty in boys.3,4
: I1 b; X1 z) S9 a' t% \The most common form of congenital adrenal4 T6 N+ v1 ^+ D0 O2 y( a' s8 _6 @
hyperplasia is the 21-hydroxylase enzyme deficiency.
! b2 s7 V. N' @- zThe 11-β hydroxylase deficiency may also result in
9 p# w2 n3 ^ P' L( i) Gexcessive adrenal androgen production, and rarely,% Q* B2 V) y- L& n( M6 ?: [ Z7 M
an adrenal tumor may also cause adrenal androgen* H2 x$ P; \' ^* i R
excess.1,38 w# }- e1 ], _9 n# w8 K) Q. J( l. y
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; j3 g* r5 Z1 J3 [. G
542 Clinical Pediatrics / Vol. 46, No. 6, July 20070 y" |9 d* k4 d
A unique entity of male-limited gonadotropin-. y, s% j% ?. a- G; U0 L
independent precocious puberty, which is also known
7 L" \& \$ @5 c# s* ]4 q# j0 bas testotoxicosis, may cause precocious puberty at a
" M" S; [$ W6 v8 ]$ Z! M( s7 C9 Yvery young age. The physical findings in these boys6 u, ]1 D D* a- a* u
with this disorder are full pubertal development,/ c! t! J# Z0 x# T5 f9 x/ ]
including bilateral testicular growth, similar to boys! n: }. m" r& ]) l9 e8 q
with CPP. The gonadotropin levels in this disorder
% v) { u- C+ j3 E5 D: s; Nare suppressed to prepubertal levels and do not show( Z: g3 @0 M7 n! ^( ~% O" f
pubertal response of gonadotropin after gonadotropin-! ~2 w8 {( ~6 a& x* ~+ U* W
releasing hormone stimulation. This is a sex-linked
X, b; s4 L l. f3 pautosomal dominant disorder that affects only( E+ o" z; ^3 ~) {8 t& J* Z
males; therefore, other male members of the family
& j) l7 g2 J; [1 H! Z: v% @3 h2 Bmay have similar precocious puberty.34 c5 t2 u! q k
In our patient, physical examination was incon-; |- C8 R' s! ]6 P
sistent with true precocious puberty since his testi-
3 ?1 h+ w+ R( kcles were prepubertal in size. However, testotoxicosis1 C% Z6 e( T& h4 a
was in the differential diagnosis because his father, f1 }' V) v! K% z
started puberty somewhat early, and occasionally,1 d: c$ A5 k s1 ?: g; g+ n+ e$ q
testicular enlargement is not that evident in the9 c' u/ `0 X$ q6 a
beginning of this process.1 In the absence of a neg-
9 \! g* m) g4 g" f1 Rative initial history of androgen exposure, our
1 {* y# C- C/ _: V% Q$ \. N/ cbiggest concern was virilizing adrenal hyperplasia,# _. Q+ v5 q; d- ~0 G
either 21-hydroxylase deficiency or 11-β hydroxylase+ ]4 m# Q, p: j+ `2 ?" r1 l
deficiency. Those diagnoses were excluded by find-+ I, k+ u9 ?" ^% g3 x
ing the normal level of adrenal steroids.! I! s- k+ v# Y* ~
The diagnosis of exogenous androgens was strongly$ J# z! u% _% b1 A# u
suspected in a follow-up visit after 4 months because* f& O. ` u- }0 W6 I0 s/ {; v
the physical examination revealed the complete disap-$ n9 `6 Y( F. I: Q6 S8 T
pearance of pubic hair, normal growth velocity, and
* k+ {1 |6 V8 q( c- pdecreased erections. The father admitted using a testos-
' U8 V* T% B+ B k' H7 P. Lterone gel, which he concealed at first visit. He was
: p2 q' @1 I! c9 i2 W J4 O. Qusing it rather frequently, twice a day. The Physicians’
# U! `: e/ [9 gDesk Reference, or package insert of this product, gel or$ g6 X' i; w1 ?8 t+ L
cream, cautions about dermal testosterone transfer to
! ^. e5 Y: S6 I9 u# ?unprotected females through direct skin exposure.6 s F M* b( j* y
Serum testosterone level was found to be 2 times the( L: G& { P, B7 S- s3 G) v
baseline value in those females who were exposed to! z$ w. I+ h3 i% v0 Q6 p: Q) Q9 I
even 15 minutes of direct skin contact with their male
# M; p, _) P/ o4 U' [. R! F0 |7 e* apartners.6 However, when a shirt covered the applica-
8 G. s6 P" T& stion site, this testosterone transfer was prevented.8 e& U( D% y2 \
Our patient’s testosterone level was 60 ng/mL,
7 f$ Y6 j g) O) v; D3 M- }which was clearly high. Some studies suggest that+ N+ R" h# b1 u2 t$ V/ ^2 A, j: h
dermal conversion of testosterone to dihydrotestos-! Y; j |4 G8 [$ m3 T- g
terone, which is a more potent metabolite, is more
& M& A' u( n9 [, q9 Gactive in young children exposed to testosterone6 f/ |. k" |& @8 |4 M
exogenously7; however, we did not measure a dihy-
9 z) |. m. }! P6 J# @drotestosterone level in our patient. In addition to4 i+ g# T% R5 r( x5 [
virilization, exposure to exogenous testosterone in
- Z; D! l* N1 F4 W& G/ ~children results in an increase in growth velocity and& Q$ U/ {4 @7 |2 m( Z
advanced bone age, as seen in our patient.
8 W1 f! _; ]* a8 C0 [The long-term effect of androgen exposure during6 d p* y' Y% s* b
early childhood on pubertal development and final; O3 [" Z! B* ~1 T* t
adult height are not fully known and always remain
, V; o! H8 Q2 A: c: F4 ~0 K4 Q2 La concern. Children treated with short-term testos-
- v8 U' ]- C1 d: K1 sterone injection or topical androgen may exhibit some
& g$ w2 M6 i* u* T1 s6 M: Tacceleration of the skeletal maturation; however, after
' v Q0 ~2 I+ L) T! m- ]" ycessation of treatment, the rate of bone maturation
! \* Q/ T2 ]; n ]decelerates and gradually returns to normal.8,9
( g) l `- @1 _2 F6 dThere are conflicting reports and controversy
2 x% f, F \) Z' V0 e+ Y: ^ Cover the effect of early androgen exposure on adult
$ y4 g' Q9 @; z6 \& E! v5 @, Cpenile length.10,11 Some reports suggest subnormal2 q! F" V+ B$ j2 T8 A
adult penile length, apparently because of downreg-
. u9 G" Q; S% r5 j$ Z- k+ zulation of androgen receptor number.10,12 However,0 S* C; P% f# B3 x
Sutherland et al13 did not find a correlation between
& b# z) l% {, ?, Echildhood testosterone exposure and reduced adult0 J# _5 y( J J4 ] x4 {" h
penile length in clinical studies.% {/ I% j- q* F1 Y) q
Nonetheless, we do not believe our patient is
! _" y9 C$ Q; _3 }going to experience any of the untoward effects from1 @6 h7 {0 q' x2 |0 `
testosterone exposure as mentioned earlier because
) W+ }5 I3 ^$ T# p- f' P. Mthe exposure was not for a prolonged period of time.: E9 S2 E7 c' g6 }7 U( H t h& ]
Although the bone age was advanced at the time of
9 A; |, y% e5 Q: t: t0 c+ [9 Rdiagnosis, the child had a normal growth velocity at' g8 M6 w% u0 C9 v5 c
the follow-up visit. It is hoped that his final adult
6 y' W0 Q) ~8 Y5 ?/ nheight will not be affected.1 K& f M% \ s1 k
Although rarely reported, the widespread avail-/ q, H W, l$ W- Q0 s9 q
ability of androgen products in our society may
+ M% {$ e6 u$ C I! Qindeed cause more virilization in male or female7 M$ C# d$ w3 v" z/ e4 R. g
children than one would realize. Exposure to andro-
4 X# s2 G9 R6 Z5 s3 I' agen products must be considered and specific ques-: Y& B8 D3 Y- b2 o
tioning about the use of a testosterone product or
" y0 y- t9 d2 ]- b8 \# w, Hgel should be asked of the family members during
! p# Y( [# S3 T7 Dthe evaluation of any children who present with vir-
( J, j" K6 V% j& Zilization or peripheral precocious puberty. The diag-3 }( A5 m6 x3 o/ K, D, W
nosis can be established by just a few tests and by
( w1 s8 {7 O' X) B1 V8 dappropriate history. The inability to obtain such a
+ U1 D ~1 C! q9 N b% T1 J& \- T" Hhistory, or failure to ask the specific questions, may
% B' ^! B% g# R0 S1 |3 _result in extensive, unnecessary, and expensive/ A& D ?( u3 ]) M8 L
investigation. The primary care physician should be
. e* q- i% V. P# ^% v9 Caware of this fact, because most of these children* Y+ O+ K8 x/ d! }+ e, t: S# j6 k
may initially present in their practice. The Physicians’ U* d' F" c# w3 b
Desk Reference and package insert should also put a" {' z( [6 u" F4 y" c/ d: x: L& _
warning about the virilizing effect on a male or
0 F z$ N& r/ ~0 m- n1 \5 Wfemale child who might come in contact with some-* { `& l& G" p L9 J7 T
one using any of these products.
$ N# w; x7 x7 r) D4 M8 I& NReferences) \, b9 G" C: ]+ k/ A3 O% H7 @
1. Styne DM. The testes: disorder of sexual differentiation
& C3 k$ ?- ^* E: o" o$ Fand puberty in the male. In: Sperling MA, ed. Pediatric5 | g, n7 n: e2 z) {4 V8 ]
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;0 A0 J/ { J% \( i* D( M
2002: 565-628.* S) l& ?$ j; Y0 x
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious9 G3 [$ H0 h6 o$ u" m5 {; M
puberty in children with tumours of the suprasellar pineal* e3 ~* B& Q7 P( `5 ~
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, n0 f, @4 o# z; M+ M4 r: c9 h
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areas: organic central precocious puberty. Acta Paediatr.
d" ^- S9 U9 Q) r0 ~% |2001;90:751-756.
) K( C5 Z; K. _- ~3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.; b/ n3 D T# Q' x& U: o5 Q) `
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
1 s2 l2 W) a2 V0 ~, EDekker Inc; 2003:211-238.
) ~% q: x$ N8 l5 X4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual6 I: v0 `8 S5 _9 @
development in a two-year-old boy induced by topical
6 y3 K. a8 W$ k9 c3 U# Texposure to testosterone. Pediatrics. 1999;104:e23.
/ P6 g* _3 l% S& K& M( r8 U. @5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
3 \/ e$ _. C; V. USkeletal Development of the Hand and Wrist. 2nd ed.8 m0 l0 G- C/ d# L1 t7 C
Stanford, CA: Stanford University Press; 1959.
V) I6 W4 `: |, D" X2 y6. Physicians’ Desk Reference. Androgel 1% testosterone,
% B1 ` H( w' b$ K, D' [% B0 ^Unimed Pharmaceutical Inc. Montvale, NJ: Medical' h9 v) n" \3 G& ?- i. n; ]
Economics Company, Inc; 2004:3239-3241.
5 K+ `: k9 Z5 `1 _7. Klugo RC, Cerny JC. Response of micropenis to topical
m# L7 y7 I7 M3 Vtestosterone and gonadotropin. J Urol. 1978;119:: A% T9 S( `) U/ g" M) e
667-668./ {4 f# E; `2 X. }8 r* k+ o
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