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is a significant concern for physicians. Central
7 N+ f6 B( K4 [* C, i$ E, mprecocious puberty (CPP), which is mediated2 [& J3 m; W' c5 r- w: ~+ a, c
through the hypothalamic pituitary gonadal axis, has
% P7 d5 R+ @/ b8 V+ m9 o4 Da higher incidence of organic central nervous system+ W3 h% P# M) S! u. e k0 Q1 W
lesions in boys.1,2 Virilization in boys, as manifested5 j7 y1 Z* f$ C1 V( E' [, Q: k
by enlargement of the penis, development of pubic( c$ u5 ?1 a, E9 @
hair, and facial acne without enlargement of testi-
9 g8 a( p+ n$ Z! ncles, suggests peripheral or pseudopuberty.1-3 We. v* M+ `) s$ n1 \/ g% X6 W/ T
report a 16-month-old boy who presented with the7 Q+ ^! t6 E8 P) J3 S
enlargement of the phallus and pubic hair develop-0 X" @4 F* R. e- i
ment without testicular enlargement, which was due
) H' \9 h+ ?3 G. A$ Y- xto the unintentional exposure to androgen gel used by- ^: _, x4 r# W2 i# a
the father. The family initially concealed this infor-
" ~ Z+ e5 [9 ^; Pmation, resulting in an extensive work-up for this3 [3 z! A9 Q# k
child. Given the widespread and easy availability of
: b2 J1 d. Z/ }. stestosterone gel and cream, we believe this is proba-
" D1 l. S: k3 m2 |; ]2 G. gbly more common than the rare case report in the$ O. T0 u2 t7 P$ c h
literature.4" I: P% ~' j# s/ U* S
Patient Report( Z; p5 O& I8 x* [& Z, ?, }" z3 p8 e
A 16-month-old white child was referred to the, L( a4 U9 `; @
endocrine clinic by his pediatrician with the concern' g1 l7 Q$ x% E* s: k7 s& }
of early sexual development. His mother noticed1 Y9 y: O* n/ R
light colored pubic hair development when he was
, [7 A6 M) P" Y+ r( A0 g" V0 g) F tFrom the 1Division of Pediatric Endocrinology, 2University of
7 f8 s+ Q. u0 H8 ?South Alabama Medical Center, Mobile, Alabama.8 E1 T6 F& C4 T
Address correspondence to: Samar K. Bhowmick, MD, FACE," B3 ?5 ^$ P) S6 u9 O4 a
Professor of Pediatrics, University of South Alabama, College of2 j1 x$ g. f* P
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;' s% o9 A' D8 S2 {( X
e-mail: [email protected].+ w0 \4 t' {0 [4 d; T0 r1 ]4 V
about 6 to 7 months old, which progressively became
2 G' {) D8 ]! E& ]5 @darker. She was also concerned about the enlarge-4 M6 Q7 f9 g+ D, h2 V/ v2 D5 A' u/ @
ment of his penis and frequent erections. The child# i9 e' q6 f- e$ r1 f
was the product of a full-term normal delivery, with
c6 c& B( R7 p) _5 b4 ya birth weight of 7 lb 14 oz, and birth length of
0 q* h5 s5 q! g3 e$ p/ I- x9 N; @20 inches. He was breast-fed throughout the first year" t, B7 ~9 D2 R4 e- O; j; _" K
of life and was still receiving breast milk along with
) S: ?% X! n; x1 y/ `solid food. He had no hospitalizations or surgery,4 f9 ^; h! O! A7 {/ S9 `* {4 E! W
and his psychosocial and psychomotor development
( [- Z5 G$ w; \was age appropriate.
& T% f* R- T) Z8 k2 a$ o, j" D9 J9 rThe family history was remarkable for the father,
5 D. y- _2 ]/ z8 }0 W9 s6 |who was diagnosed with hypothyroidism at age 16,; W) m7 y" l6 }( v3 S
which was treated with thyroxine. The father’s% a# Y1 G& M6 U, V
height was 6 feet, and he went through a somewhat3 X0 M0 V# U" ? g) E% {
early puberty and had stopped growing by age 14.
; n+ S8 W4 B8 W. b9 OThe father denied taking any other medication. The9 s! W2 @. L* t8 k
child’s mother was in good health. Her menarche
5 \% ?( h8 W$ u: y, D* S* ~* hwas at 11 years of age, and her height was at 5 feet
& {; T' \6 k& F4 O( j( U' C. ^5 inches. There was no other family history of pre-
, P' J+ v* q4 D; n' U0 Z/ t( X7 Bcocious sexual development in the first-degree rela-
. U+ ]% s. Q8 ]( t& F" @( Mtives. There were no siblings.: m4 O# y/ N. z; O# a/ U
Physical Examination, U) `3 K9 k$ S; o
The physical examination revealed a very active,# P( F$ X+ {8 N* C$ B* g2 V( x
playful, and healthy boy. The vital signs documented% n/ x& T- k& W5 f" Z7 D
a blood pressure of 85/50 mm Hg, his length was
; t2 P6 k; Q. m: g+ F- Q/ U90 cm (>97th percentile), and his weight was 14.4 kg1 E( q, W, F7 E! R
(also >97th percentile). The observed yearly growth8 B H0 c4 ?' D0 t* ~
velocity was 30 cm (12 inches). The examination of0 q7 c. a) _# d: b$ Y/ Z8 A6 E1 M
the neck revealed no thyroid enlargement.
$ ^& ~; V0 @. W1 x1 `! hThe genitourinary examination was remarkable for. G0 R6 l/ e% P6 k! _0 t
enlargement of the penis, with a stretched length of0 E8 i0 V2 J( p7 A7 y
8 cm and a width of 2 cm. The glans penis was very well
9 M; g. i+ u8 Y* X- Sdeveloped. The pubic hair was Tanner II, mostly around3 o1 Z+ N5 Q% }" g8 J
540
+ _, H" E! _7 n+ _* Yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from# O8 U$ _0 v+ j7 ]2 T+ _ W9 E0 K* @8 K
the base of the phallus and was dark and curled. The
7 B. s0 n! J0 b, P! [2 v4 ctesticular volume was prepubertal at 2 mL each.
- F7 p% F* X7 H8 ]The skin was moist and smooth and somewhat! E9 D. f# a2 {4 T# D
oily. No axillary hair was noted. There were no
9 s! S( c+ i7 L1 R8 Uabnormal skin pigmentations or café-au-lait spots.
9 {$ y5 B% O" ~5 d8 g4 G: j; uNeurologic evaluation showed deep tendon reflex 2+
9 P7 B* ~6 ^3 T3 q, Rbilateral and symmetrical. There was no suggestion* M- u/ J0 a9 a+ i; d( t8 p+ s9 o
of papilledema.
4 O. S8 d* h; Y: |+ X( p: ]$ N5 I+ `Laboratory Evaluation% d3 x. N- w8 I7 w
The bone age was consistent with 28 months by
, ~) A4 U7 @7 s* kusing the standard of Greulich and Pyle at a chrono-* D' D* e2 _7 \' l# u Z1 b( S
logic age of 16 months (advanced).5 Chromosomal
! b! l" _4 X$ T z! mkaryotype was 46XY. The thyroid function test
+ q1 H9 N k+ t) {' H. B) }* kshowed a free T4 of 1.69 ng/dL, and thyroid stimu-1 Y3 y" ~! b8 w3 b! E& F
lating hormone level was 1.3 µIU/mL (both normal).
8 K+ \7 a* E( p5 h& D6 mThe concentrations of serum electrolytes, blood
V* l3 T: j0 ~% ]( z$ kurea nitrogen, creatinine, and calcium all were
+ ?4 p' C' w* }0 z- p2 k: nwithin normal range for his age. The concentration
' \7 |* X& F+ N! xof serum 17-hydroxyprogesterone was 16 ng/dL
: C0 r, |* L$ ~( j" b* }(normal, 3 to 90 ng/dL), androstenedione was 201 b' R. f2 a. V& S
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-' d; j+ I8 e0 f- f
terone was 38 ng/dL (normal, 50 to 760 ng/dL),9 G u9 ?- x- o8 v0 l8 ~5 ^
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
' i. O0 X5 }) c$ ]' `49ng/dL), 11-desoxycortisol (specific compound S)
" L% N% F0 Y ]was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-3 |- [( k# ]' g, g, K5 f
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total: O! b* j4 k) @2 K2 w9 d" J
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
0 i7 m7 g8 R& y4 v% ^. V ^3 e9 dand β-human chorionic gonadotropin was less than
1 x' ^1 q: M' C1 p, L$ a5 mIU/mL (normal <5 mIU/mL). Serum follicular& N( |3 ~; n! P) _$ h9 L
stimulating hormone and leuteinizing hormone
; k- s& C1 l, i3 b5 s" Rconcentrations were less than 0.05 mIU/mL
c2 J+ P4 X. [% s(prepubertal).
6 c W% ?# C6 B! G2 Z( mThe parents were notified about the laboratory. [& ^% q- Z4 `1 A6 d* @3 l7 U" ?
results and were informed that all of the tests were
. H" S2 G# e2 R% i @. K! W7 E& e! `normal except the testosterone level was high. The. D9 r) _; C% R9 }- D, r
follow-up visit was arranged within a few weeks to
9 L" G) p* Q' \, Robtain testicular and abdominal sonograms; how-; {, c8 r7 ` l6 l; N U7 h
ever, the family did not return for 4 months.
8 L4 N8 v# n$ d" j* Y8 z( V4 _Physical examination at this time revealed that the
6 d& }, L l2 [child had grown 2.5 cm in 4 months and had gained
- Y# d* T L6 x. d7 k9 S2 kg of weight. Physical examination remained
* H6 L5 y! K- L" r- }( junchanged. Surprisingly, the pubic hair almost com-* s+ { X( A6 h l
pletely disappeared except for a few vellous hairs at' A: m9 v& U. B1 y, H6 E( S
the base of the phallus. Testicular volume was still 24 y1 g) F) h1 A( z
mL, and the size of the penis remained unchanged.
! w9 u' X/ ~& _+ [2 |The mother also said that the boy was no longer hav-4 B! W/ Q. L9 c- t" z- Z, H
ing frequent erections.
6 [' G7 L2 ^6 y) f- hBoth parents were again questioned about use of
U+ _ D0 ~' j9 O Lany ointment/creams that they may have applied to- p2 Y7 d L8 P' [
the child’s skin. This time the father admitted the- ^7 c" `( P% X9 m1 Y1 s u- b
Topical Testosterone Exposure / Bhowmick et al 541
. O8 o3 Y1 W! E/ |2 i7 Huse of testosterone gel twice daily that he was apply-
" }3 q% n# T. [% J1 ~9 p4 Eing over his own shoulders, chest, and back area for
! V' @0 `7 J; U5 Pa year. The father also revealed he was embarrassed
; i; }2 M K: `% s8 j. hto disclose that he was using a testosterone gel pre-
0 Y% H+ L3 r/ b8 ^& \4 zscribed by his family physician for decreased libido
# V/ T% m N: h& ?6 msecondary to depression.1 Q, ^- M! n0 O+ n
The child slept in the same bed with parents.9 c, @1 W" `& u
The father would hug the baby and hold him on his
6 i9 N( g u8 [8 f, l4 ~chest for a considerable period of time, causing sig-
- S! U) t {' p9 Y5 D9 f4 bnificant bare skin contact between baby and father.
4 f" u. g9 V9 s' t4 L( oThe father also admitted that after the phone call,) A9 K0 O D* y+ Z2 @/ C2 b$ n: j G6 E
when he learned the testosterone level in the baby
/ {% r1 u. F, Jwas high, he then read the product information8 ?( D: y, |; v; F; A1 r
packet and concluded that it was most likely the rea-
# c- A# r$ l; v4 V" z) sson for the child’s virilization. At that time, they8 H* } M1 N1 F/ _+ X( |+ v
decided to put the baby in a separate bed, and the" \5 R7 H2 T* x
father was not hugging him with bare skin and had$ v8 |- _+ b) v/ V; ]+ U7 [7 a
been using protective clothing. A repeat testosterone( m/ o3 G* H& X
test was ordered, but the family did not go to the) m2 `9 n1 @( u3 s. ]' V- X
laboratory to obtain the test.
5 m; \4 x; E% w' k7 ^Discussion# k( R5 U3 E6 a* |3 L b5 m3 T
Precocious puberty in boys is defined as secondary9 i! a8 r6 T! O1 e7 b* f# y
sexual development before 9 years of age.1,4
* q& r- S4 F# T+ JPrecocious puberty is termed as central (true) when
0 a! b" f; b; W1 G+ \it is caused by the premature activation of hypo-" D7 I5 H) c% }* n1 U) z4 R
thalamic pituitary gonadal axis. CPP is more com-2 g; J7 e% w% `- C) n- v
mon in girls than in boys.1,3 Most boys with CPP1 K) H7 u" G: s- w0 E e6 V; ]2 u
may have a central nervous system lesion that is4 E; z4 `3 x$ U$ {3 s
responsible for the early activation of the hypothal-
7 _1 j7 ~7 c8 n. c2 \amic pituitary gonadal axis.1-3 Thus, greater empha-
' }1 }" G. z u# j2 u; E# ^sis has been given to neuroradiologic imaging in
' i: H7 g% i% x }- d" Aboys with precocious puberty. In addition to viril-
& z6 j) h( j* w5 Y9 |* Iization, the clinical hallmark of CPP is the symmet-
; r( \0 w( J7 R2 y" j! l) \rical testicular growth secondary to stimulation by
+ ?; {- b5 R/ m; Bgonadotropins.1,3( N" ~$ f& Z# x. ]
Gonadotropin-independent peripheral preco-
2 Y1 ]4 u) g% k' Y8 K7 wcious puberty in boys also results from inappropriate4 \$ l+ O. y* o7 t" n
androgenic stimulation from either endogenous or# m; i% {% k% s" |4 V$ D% [
exogenous sources, nonpituitary gonadotropin stim- ?1 u1 N/ j3 \0 U
ulation, and rare activating mutations.3 Virilizing, V+ P% x0 R) f( d# ^* K
congenital adrenal hyperplasia producing excessive
' E: s i2 ?- @* D1 j8 {adrenal androgens is a common cause of precocious) t, w* B( k4 B9 c$ @* G4 B4 u* `
puberty in boys.3,4
8 n0 H' S8 m6 r8 jThe most common form of congenital adrenal
7 Q" ^( e( W* Mhyperplasia is the 21-hydroxylase enzyme deficiency.
1 J7 J& c6 d# N h+ H/ V0 S2 a. WThe 11-β hydroxylase deficiency may also result in; p1 Y3 }( x, u% F: v6 s
excessive adrenal androgen production, and rarely,8 t& D+ _ ]) P! G) F+ j0 c; i
an adrenal tumor may also cause adrenal androgen
% G5 T- x6 e0 O7 }excess.1,3 @0 h9 l7 ~6 _9 }. |' }
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 ]5 n1 n% y/ _542 Clinical Pediatrics / Vol. 46, No. 6, July 2007! c g8 V8 F+ K4 R2 d. A) i2 v
A unique entity of male-limited gonadotropin-
" r8 ?- Z [7 P3 Bindependent precocious puberty, which is also known( h) U+ S# o5 |( p2 C A3 s9 @
as testotoxicosis, may cause precocious puberty at a
8 S- z2 m* {6 x( h3 B3 {9 lvery young age. The physical findings in these boys
& B+ {4 [% X: H# D( e. fwith this disorder are full pubertal development,# _5 l2 q/ n% K) R) [
including bilateral testicular growth, similar to boys7 n; X. }' r; d, g# U
with CPP. The gonadotropin levels in this disorder
8 ^ U$ M. \2 t: _6 Sare suppressed to prepubertal levels and do not show3 ?% A9 A& o* I2 B( w1 |3 {
pubertal response of gonadotropin after gonadotropin-) Z# Y9 W! z2 T+ q1 [6 B8 `
releasing hormone stimulation. This is a sex-linked" y& N0 C" @* s/ c
autosomal dominant disorder that affects only- h8 x& W/ y4 w3 m8 E( q8 b" _9 n
males; therefore, other male members of the family# _7 j$ X( H6 B5 J% B2 a
may have similar precocious puberty.3
; E- ?# b. C' L8 |7 C. R7 x, W; kIn our patient, physical examination was incon-% i, g- C3 M. j' Q( U# b
sistent with true precocious puberty since his testi-2 _$ Z" p4 T+ `3 [7 _2 c- i+ y
cles were prepubertal in size. However, testotoxicosis
% i; F/ ^# I& D% l% g& R! @" Iwas in the differential diagnosis because his father
# l9 j3 r& y$ u ?, {started puberty somewhat early, and occasionally,
* w9 r3 U5 {8 w1 S1 ^9 Rtesticular enlargement is not that evident in the" ]: [/ e. ?& H0 w' s' x/ `
beginning of this process.1 In the absence of a neg-
4 _4 d; A5 N! T3 _5 h) T8 Aative initial history of androgen exposure, our* H+ W9 X+ E b( e+ ^" x
biggest concern was virilizing adrenal hyperplasia,
( |( y+ a4 }- ?% E& R4 X- i/ Jeither 21-hydroxylase deficiency or 11-β hydroxylase6 o0 i1 \ a" q/ c
deficiency. Those diagnoses were excluded by find-
8 i: \" _: `7 B& n/ ?' I3 ~. ]( Xing the normal level of adrenal steroids.0 d0 C' p% y6 W6 G: F
The diagnosis of exogenous androgens was strongly
; {. M3 Y. K' T: ^2 qsuspected in a follow-up visit after 4 months because
7 H7 D' F, i) R7 Rthe physical examination revealed the complete disap-6 F( Y# @: |/ h$ X9 q
pearance of pubic hair, normal growth velocity, and6 }. F% b3 D5 g. m* }6 t: S' @
decreased erections. The father admitted using a testos-
+ _: t+ E! z( w1 ?" U$ Dterone gel, which he concealed at first visit. He was
: W& B/ S$ V& y( @; S0 g4 musing it rather frequently, twice a day. The Physicians’ Y4 r% R) V, |! f+ {" w
Desk Reference, or package insert of this product, gel or5 Y$ F1 w; B* I" U/ U; {( i( _6 r
cream, cautions about dermal testosterone transfer to
! B- n+ v8 V8 B0 U$ o" R0 punprotected females through direct skin exposure./ @$ X# k, {) ?6 B8 Q' t b
Serum testosterone level was found to be 2 times the
2 L: v* m: ~4 y7 ebaseline value in those females who were exposed to
5 f3 I0 o x8 x% X: Jeven 15 minutes of direct skin contact with their male
- T4 a: b; [7 V0 Wpartners.6 However, when a shirt covered the applica-
" ~1 h# ]% x* ?7 ction site, this testosterone transfer was prevented.
/ k8 o# j$ D' j, ~ k5 uOur patient’s testosterone level was 60 ng/mL,
0 K6 |' \. I8 ~! l/ N0 F6 zwhich was clearly high. Some studies suggest that
* H$ u3 k' \* z* c4 f3 u/ `# s) i1 \dermal conversion of testosterone to dihydrotestos-" G1 a) R7 X; \* [) N6 L" b
terone, which is a more potent metabolite, is more5 o/ x$ X. T3 w
active in young children exposed to testosterone2 _ m3 H* Z% w* s
exogenously7; however, we did not measure a dihy-
5 M& b( v! d( H( M) sdrotestosterone level in our patient. In addition to; v1 r$ O+ K+ A; N- R* y6 J
virilization, exposure to exogenous testosterone in
: K, H5 z& Z; j+ ^( Ichildren results in an increase in growth velocity and
: c% `3 U) s+ a2 }# q" e4 h! X" Xadvanced bone age, as seen in our patient.
$ u `! W5 x8 t, D+ X" N3 V* dThe long-term effect of androgen exposure during) a% @' V# t; M4 H
early childhood on pubertal development and final& P( u8 L% b5 d% k3 j% ]
adult height are not fully known and always remain
$ b3 ^( a% C/ L8 n- c' A8 Ia concern. Children treated with short-term testos-$ d# [& G0 ^/ G" |* r! t
terone injection or topical androgen may exhibit some
& B# Y, h2 I& v& _ b7 V Pacceleration of the skeletal maturation; however, after* h: f. _% w2 N ^
cessation of treatment, the rate of bone maturation
+ P" o. M" ?" Idecelerates and gradually returns to normal.8,9 D; @( V0 K$ R# t
There are conflicting reports and controversy
2 n* v. Y4 H2 L! lover the effect of early androgen exposure on adult
% R0 {: ?* @) W5 V6 i7 o5 x5 Ppenile length.10,11 Some reports suggest subnormal5 ^* H. [' e% A' ]
adult penile length, apparently because of downreg-
4 n) ~& T, w( Q8 |- Kulation of androgen receptor number.10,12 However,- u8 w- i% D. D. k
Sutherland et al13 did not find a correlation between
# v X3 e7 m }4 H5 O6 {* ]- I! v8 Dchildhood testosterone exposure and reduced adult+ ~$ `$ M, s3 T& [0 G0 ?+ S7 q
penile length in clinical studies.$ G( t& C% w1 ^+ h7 T* D
Nonetheless, we do not believe our patient is: t& e, j& M5 v
going to experience any of the untoward effects from
: r; I# ]8 m# W% x" ?testosterone exposure as mentioned earlier because: Z6 I0 x; {' a" B% |; X# ^# h
the exposure was not for a prolonged period of time.
* {4 T% A) j: e: i2 rAlthough the bone age was advanced at the time of5 E# s4 [4 S4 i1 l# `4 }" r
diagnosis, the child had a normal growth velocity at. H/ F( [- x' }5 k* a
the follow-up visit. It is hoped that his final adult
$ I% h3 W$ v7 D2 S0 m- Pheight will not be affected.' { b, V+ a- |
Although rarely reported, the widespread avail-& Y2 i! K0 f K9 K
ability of androgen products in our society may4 u; J- c# |3 x- w% y# X
indeed cause more virilization in male or female
, \9 D, M$ n: S% _children than one would realize. Exposure to andro-
' x- y+ C# s+ }& s; ngen products must be considered and specific ques-9 F2 @- Q6 s7 b2 @4 c
tioning about the use of a testosterone product or
; u; [$ |" O+ o4 V3 F: Bgel should be asked of the family members during
1 p3 G0 T( l* k0 ?; kthe evaluation of any children who present with vir-) i) y0 g. S7 X# N
ilization or peripheral precocious puberty. The diag-- P0 e0 w6 W' l1 W
nosis can be established by just a few tests and by. d# D+ Y4 ?3 L! F: X& L6 R6 r
appropriate history. The inability to obtain such a4 Q5 W# M' ~8 y% [2 e- }/ {
history, or failure to ask the specific questions, may
5 y U7 x% ^1 p" k) e& iresult in extensive, unnecessary, and expensive9 K$ P T1 y+ o
investigation. The primary care physician should be$ V9 M% l$ ?( p, b
aware of this fact, because most of these children
; x( {2 s% s8 i/ S8 Cmay initially present in their practice. The Physicians’
% q0 T! W/ n# JDesk Reference and package insert should also put a
1 J" C5 J# o* S3 s3 |warning about the virilizing effect on a male or
: M+ O8 S) Y; v/ rfemale child who might come in contact with some-, P; L [6 ~0 o8 a3 [
one using any of these products.
; N; a# E" m! A8 FReferences( O7 O. N; f0 ]% O
1. Styne DM. The testes: disorder of sexual differentiation, g, y3 g% r. C- R
and puberty in the male. In: Sperling MA, ed. Pediatric
. Z4 d M1 @. c- J* _4 \9 pEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
8 V- l# u8 d& y2002: 565-628.+ c) K1 S; |( |7 e# O* p
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
5 R' D6 @% A ~. q' X1 tpuberty in children with tumours of the suprasellar pineal
: t3 l& W& M! t d+ e6 e- aat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. d, V/ H1 q+ e
Topical Testosterone Exposure / Bhowmick et al 543$ g4 A) b8 J# A/ b5 [3 T7 O" c
areas: organic central precocious puberty. Acta Paediatr.
: h P6 \% w! [2001;90:751-756.
' l! N; B* k1 B2 A% n3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
- c4 E4 J3 E6 TPediatric Endocrinology. 4th ed. New York, NY: Marcel
' H( l1 U2 B S: J$ o TDekker Inc; 2003:211-238.- i* @1 E- H$ C9 }; v; o+ a% m
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
* G1 \/ B6 _% i. _development in a two-year-old boy induced by topical5 q7 l& N0 R/ [ q2 O+ f+ A
exposure to testosterone. Pediatrics. 1999;104:e23.
7 d1 b' f# w) B( r2 G1 M. z5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
3 ]& ?5 e$ c7 w1 W! W/ t& _Skeletal Development of the Hand and Wrist. 2nd ed.
n! j+ C$ v7 D% T2 F+ QStanford, CA: Stanford University Press; 1959.+ I( K5 l1 \2 B6 A, d. s5 e
6. Physicians’ Desk Reference. Androgel 1% testosterone,
3 d0 J( x% q. f p3 sUnimed Pharmaceutical Inc. Montvale, NJ: Medical
' s4 ~! [: X/ j, H1 D* rEconomics Company, Inc; 2004:3239-3241.
( O& B2 J, E' F q( V4 v0 M7. Klugo RC, Cerny JC. Response of micropenis to topical
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