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is a significant concern for physicians. Central2 Z; L8 P" a G& p5 `, d9 \
precocious puberty (CPP), which is mediated
: T" z8 u r d @- R. w& [+ j5 N* ]0 Ethrough the hypothalamic pituitary gonadal axis, has# n3 q% ?$ O% Z2 H$ T; M/ z
a higher incidence of organic central nervous system n8 D; s. ?7 j' H. Y) O5 {
lesions in boys.1,2 Virilization in boys, as manifested
9 C C. G2 k1 K9 F. a. ?3 S- Hby enlargement of the penis, development of pubic
# }( l# ^$ k7 C: h0 N! Fhair, and facial acne without enlargement of testi-" b, K. M$ u3 f8 [- [
cles, suggests peripheral or pseudopuberty.1-3 We1 L, o- Y/ M5 F9 p& e
report a 16-month-old boy who presented with the
5 K. r* \; Q9 x( J$ R, G) d8 Kenlargement of the phallus and pubic hair develop-
: L/ o; w, d( M2 _& Wment without testicular enlargement, which was due
% }/ @/ k$ n- b! }to the unintentional exposure to androgen gel used by
) e U# l; u9 Uthe father. The family initially concealed this infor-/ |- a1 S& U! Z' R+ X$ _- @
mation, resulting in an extensive work-up for this
" v& v* l5 j" D7 P4 _+ {7 y! ~child. Given the widespread and easy availability of
0 Z" v- G' ?# w7 x' Ftestosterone gel and cream, we believe this is proba-0 w: y7 s* f0 @$ c6 i9 c
bly more common than the rare case report in the
% x2 ]9 l( l( I* A! F6 U$ \3 oliterature.4
9 W- Z" ]+ u. X- {: [7 EPatient Report" F+ U8 K0 U( M" `& l
A 16-month-old white child was referred to the4 k, {1 k! z: C1 q
endocrine clinic by his pediatrician with the concern
5 W6 J9 e* G% _0 ?" f [of early sexual development. His mother noticed- X, z9 J* i. A7 e0 R c- W: v3 k
light colored pubic hair development when he was1 [8 ~# I5 [" [+ D! o# a7 g
From the 1Division of Pediatric Endocrinology, 2University of
! ]8 H; H- E7 Z& R. s) g. |South Alabama Medical Center, Mobile, Alabama.9 l+ M# ?3 v5 H% T, @2 i
Address correspondence to: Samar K. Bhowmick, MD, FACE,7 B7 }* s3 P3 E
Professor of Pediatrics, University of South Alabama, College of9 X1 H7 O+ t( _* t+ [/ C9 P
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
7 e+ x+ N! Y9 we-mail: [email protected].* L. p1 }9 h4 m6 Y
about 6 to 7 months old, which progressively became3 g4 E7 s% T' m4 P9 S7 P
darker. She was also concerned about the enlarge-
" L& m( y, \2 X! n6 W, A% D7 g$ w! S8 iment of his penis and frequent erections. The child
; j0 Z! h x6 u6 y% T# x3 u" Ywas the product of a full-term normal delivery, with) p; V ~9 G* Y" @; p
a birth weight of 7 lb 14 oz, and birth length of
& O6 Q1 f: |/ K; ]# E' c0 o, A0 m20 inches. He was breast-fed throughout the first year
5 z9 Q- V' P: h% y# n/ \1 yof life and was still receiving breast milk along with
! u5 {0 K1 b4 esolid food. He had no hospitalizations or surgery,
- {) B4 O6 b! _( ]0 q [( Land his psychosocial and psychomotor development
* s) D6 I6 U/ Lwas age appropriate.5 q' L3 _! c. I, j* l8 E9 m$ U
The family history was remarkable for the father,
5 \8 ]2 a. I' H, `. c$ e5 }7 ^who was diagnosed with hypothyroidism at age 16,
! S6 I% z" Y0 |3 Q8 Y( z+ L5 I6 K& awhich was treated with thyroxine. The father’s
0 t& o! ]. n' V$ |( hheight was 6 feet, and he went through a somewhat9 l3 n% C- [7 m! y6 r* @
early puberty and had stopped growing by age 14.
p4 Q/ f- H2 C' J( A. S( bThe father denied taking any other medication. The
8 ]0 F8 u* @ |+ a, W- lchild’s mother was in good health. Her menarche7 ?; [: k6 x. l
was at 11 years of age, and her height was at 5 feet5 U2 N: x- o; x% H
5 inches. There was no other family history of pre-( k6 `+ O9 H# l9 R" G
cocious sexual development in the first-degree rela-
" z+ J+ D7 Z' H! [ ntives. There were no siblings.
0 c1 u7 `( W2 CPhysical Examination; y9 ?8 T# B! Z
The physical examination revealed a very active,
3 j. e( t( z! u. K, v. y! O3 U4 O" Q8 Xplayful, and healthy boy. The vital signs documented
8 J2 X2 ^# o9 j. na blood pressure of 85/50 mm Hg, his length was
) U! } |; o- l. @! Y0 \5 ?90 cm (>97th percentile), and his weight was 14.4 kg' g) I2 W3 P5 L* T. S4 J- Z1 g
(also >97th percentile). The observed yearly growth4 m: ^# q4 f* i3 c m: h! n
velocity was 30 cm (12 inches). The examination of
: v# F2 b$ T2 Qthe neck revealed no thyroid enlargement.$ U+ B7 ^1 u/ p6 J4 c/ ]8 n0 X
The genitourinary examination was remarkable for
, V3 D- V& |/ N( ` Y6 }+ Kenlargement of the penis, with a stretched length of% P* Q5 |8 n$ O J
8 cm and a width of 2 cm. The glans penis was very well
9 u; [# L( n# c1 o( Jdeveloped. The pubic hair was Tanner II, mostly around
* x" _) r; q9 D) ^% F540
. \. ?' H( T9 \- Oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ k7 z) [& b2 r+ s5 i
the base of the phallus and was dark and curled. The
1 x* Y ]2 l, G9 [* l0 ]testicular volume was prepubertal at 2 mL each.# Q l E" }2 u( _% a
The skin was moist and smooth and somewhat
* _- m7 L) S2 Q/ E5 toily. No axillary hair was noted. There were no5 S2 V, E# f. J; s! I' o7 D
abnormal skin pigmentations or café-au-lait spots.( Y+ V y; J1 a2 h; b! P1 B
Neurologic evaluation showed deep tendon reflex 2+
( F5 o$ K, u8 ?bilateral and symmetrical. There was no suggestion
) K% q* l$ f, }$ P; X) V- N" cof papilledema.! `; G# n+ J; T9 F1 A
Laboratory Evaluation
/ r# F: K0 c; t) A* Y0 r8 V2 _The bone age was consistent with 28 months by+ w8 j+ f4 @3 h4 s6 w
using the standard of Greulich and Pyle at a chrono-, N. B7 P- R8 R, c# G9 {9 E$ {
logic age of 16 months (advanced).5 Chromosomal
2 Y7 I* \1 X6 B, jkaryotype was 46XY. The thyroid function test7 u; Y4 `8 N, h/ Q- R% P# {/ j( e5 t; H
showed a free T4 of 1.69 ng/dL, and thyroid stimu-0 o+ K* e, }0 j' t# V8 h, D
lating hormone level was 1.3 µIU/mL (both normal).
2 E6 N5 b4 W* Y, V! ]The concentrations of serum electrolytes, blood
( l% a- _% j# R2 _4 furea nitrogen, creatinine, and calcium all were, X. C; H. e+ e7 [
within normal range for his age. The concentration
0 O9 k) z0 K5 ?' xof serum 17-hydroxyprogesterone was 16 ng/dL
6 f0 H/ `* [6 F) _4 e4 ] ]9 M* K(normal, 3 to 90 ng/dL), androstenedione was 20
- I8 B7 h4 q3 ` Gng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-4 S* ?4 c- p: ?2 O( [% d6 E2 }
terone was 38 ng/dL (normal, 50 to 760 ng/dL),8 M# x- d5 v6 h/ A' Z
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
1 T. x" _; V; j- m, I49ng/dL), 11-desoxycortisol (specific compound S)+ o/ d& B% k: k1 B J& y8 Z
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
+ P$ V' e$ ?9 i" ~2 f' V# X9 btisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
8 v* K" i0 R% a1 A3 @% P& g; Itestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
, n& D9 d1 y0 u3 Q4 V/ pand β-human chorionic gonadotropin was less than; }$ v- i- x) y
5 mIU/mL (normal <5 mIU/mL). Serum follicular1 L1 k; O! k) r3 p" V0 O
stimulating hormone and leuteinizing hormone& P$ T5 R @+ T0 L* h! m
concentrations were less than 0.05 mIU/mL9 }* {8 z0 ]1 g/ d( A5 T4 Y& d- M
(prepubertal).
9 M1 H8 W# X# O) ZThe parents were notified about the laboratory
, q2 D- ~$ s3 }- kresults and were informed that all of the tests were
s6 u9 P1 O; u/ Z; _normal except the testosterone level was high. The
. A0 o' Q$ B- Z3 r& u& [! Jfollow-up visit was arranged within a few weeks to
' B2 f; C \0 Z" E- O- Xobtain testicular and abdominal sonograms; how-
( x& M# x% _$ `: h: @( `" n' H3 @4 Jever, the family did not return for 4 months.* F* t- i+ y, ]4 @0 l0 f& v
Physical examination at this time revealed that the
" W0 }2 g9 Q5 Xchild had grown 2.5 cm in 4 months and had gained6 \- @) _2 `( h5 g
2 kg of weight. Physical examination remained
* h' c; S* W5 W! k( A9 K$ D4 Junchanged. Surprisingly, the pubic hair almost com-
) R" f" v+ ^. @# Q1 w; Opletely disappeared except for a few vellous hairs at9 \% [! P; U3 s9 Z
the base of the phallus. Testicular volume was still 27 ?( ^9 O5 u4 `9 E0 F( U
mL, and the size of the penis remained unchanged.
3 {5 p9 M+ w+ t a$ H! n, C- U, KThe mother also said that the boy was no longer hav-; ^$ Q$ w0 N m( a5 r- e6 E- Y9 |9 @
ing frequent erections.* U( w9 g7 v2 ^# w6 n
Both parents were again questioned about use of
, h& l1 O, M8 P/ Y% Q* @- L/ ]3 jany ointment/creams that they may have applied to
0 C2 l' f, O. jthe child’s skin. This time the father admitted the
7 t0 g" K; t% v1 O0 m9 E8 i/ i5 zTopical Testosterone Exposure / Bhowmick et al 541
# @- ?9 \- G: c- x- ~* ruse of testosterone gel twice daily that he was apply-( [+ z* ]' o: U8 H. r' f
ing over his own shoulders, chest, and back area for' f$ @! p% }5 v- g
a year. The father also revealed he was embarrassed
- E% v9 q; _0 R1 sto disclose that he was using a testosterone gel pre-, d( {* F3 J6 r: T8 B
scribed by his family physician for decreased libido
" I' p1 D6 w9 T$ S Y1 n3 r* Esecondary to depression.4 t& H; I7 \" J9 q# L
The child slept in the same bed with parents.
, d1 f, N5 ~' g' X4 U" \The father would hug the baby and hold him on his
+ c% Y$ _ |" l6 t* Z3 rchest for a considerable period of time, causing sig-
" k2 ^4 F) c7 L; ~7 h, L7 snificant bare skin contact between baby and father.& J# r6 r3 m! h$ t4 b/ _+ c- z8 [
The father also admitted that after the phone call,6 `) t$ B% u5 W) D6 S- G8 i* Q
when he learned the testosterone level in the baby: N* Y$ ?- R2 V" T1 ~) }! S
was high, he then read the product information8 ]. c8 I8 X, e5 k
packet and concluded that it was most likely the rea-% j/ b8 I( E# Q% }
son for the child’s virilization. At that time, they
2 d1 j g: L& N8 \. C( B4 n! y! Cdecided to put the baby in a separate bed, and the7 ~8 W" Z, V, }% Z: j5 E
father was not hugging him with bare skin and had" M1 L: q# e Y2 U- A+ F+ d
been using protective clothing. A repeat testosterone' u2 t' |5 u4 x7 x
test was ordered, but the family did not go to the N7 {+ W& C5 g* F; |1 x4 @
laboratory to obtain the test.
, M2 v2 h. j1 _4 \9 E4 dDiscussion! f) D" R+ k5 x; {7 ^
Precocious puberty in boys is defined as secondary
7 {" |8 `* w: E O- ]sexual development before 9 years of age.1,4
0 w7 w y! r- \Precocious puberty is termed as central (true) when
" y0 Q% R. i- p: n9 yit is caused by the premature activation of hypo-
4 Y+ X l- d) Z2 b' G# b( ^3 }thalamic pituitary gonadal axis. CPP is more com-% v8 c4 S/ o, P; Z4 D( Z% b! g
mon in girls than in boys.1,3 Most boys with CPP7 [1 \/ Q- g/ c/ ^, {7 A$ ^5 u
may have a central nervous system lesion that is' t$ I, J+ {7 [0 W, W2 Z( `
responsible for the early activation of the hypothal-
0 d+ f. y* k( d" \" Y; G2 R$ }- Jamic pituitary gonadal axis.1-3 Thus, greater empha-2 @9 `& Z* g6 {0 G( [
sis has been given to neuroradiologic imaging in) `" d( x% y) x$ _
boys with precocious puberty. In addition to viril-7 X8 {% M4 W- [9 `! z
ization, the clinical hallmark of CPP is the symmet- E& J1 o& p+ ?4 E
rical testicular growth secondary to stimulation by' G, x5 v" R2 c- @- J& ^9 r
gonadotropins.1,3
& \% m( G: |% ~$ \Gonadotropin-independent peripheral preco-7 W. E9 n. U! E& o3 ]. U
cious puberty in boys also results from inappropriate3 S9 c4 s# t* n6 M
androgenic stimulation from either endogenous or8 ^- n9 l, H7 c O
exogenous sources, nonpituitary gonadotropin stim- @, R( X$ x( E2 j5 D2 _
ulation, and rare activating mutations.3 Virilizing
0 w" S- N; \0 R* A9 fcongenital adrenal hyperplasia producing excessive* b1 j& Y& Z8 o# R P5 V- {
adrenal androgens is a common cause of precocious
/ M7 N8 o2 N& L# {1 T' [ H- t& ?, f- a5 Ipuberty in boys.3,4
" F* x3 @9 U& z; w" \The most common form of congenital adrenal7 M6 ^' v" C# a3 `( S- A! y
hyperplasia is the 21-hydroxylase enzyme deficiency.5 T9 F0 O$ z0 P& R( ]) a' I
The 11-β hydroxylase deficiency may also result in+ b1 U& i+ W- X& w5 v
excessive adrenal androgen production, and rarely,0 m, X: ^& i& ^ ^
an adrenal tumor may also cause adrenal androgen7 m* n( v" ]# _! u) E8 p
excess.1,3
: X; z( B f& \) o Eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( [, r: P. ?) d
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007! X( m1 ? Q. |4 l0 A* J. d
A unique entity of male-limited gonadotropin-
, i; _) s) J3 ^6 ^9 o3 E0 S7 Mindependent precocious puberty, which is also known
# O: a* z, Y# F! O: uas testotoxicosis, may cause precocious puberty at a7 d" z$ K9 P+ y) W+ M, J
very young age. The physical findings in these boys A, ?) Y- A/ O' U2 l9 R7 |# x
with this disorder are full pubertal development,$ g- z7 L: B8 ?* `* l
including bilateral testicular growth, similar to boys
$ Z: W0 y+ p* I% E- _8 h* E/ Bwith CPP. The gonadotropin levels in this disorder: I+ Y- ^8 c) T; U1 A
are suppressed to prepubertal levels and do not show
: F* J6 B. B8 Vpubertal response of gonadotropin after gonadotropin-
4 f# G4 D+ ?1 x7 ]releasing hormone stimulation. This is a sex-linked4 L! w0 Q7 R* D e7 R* H
autosomal dominant disorder that affects only K6 O) U1 d. q2 j% b9 d; E8 `! M1 _* U
males; therefore, other male members of the family
$ G: A. q. Z) k2 P5 hmay have similar precocious puberty.3" N3 \7 Q' r4 H3 o9 S& L! i
In our patient, physical examination was incon- \- Y! b5 B. l
sistent with true precocious puberty since his testi-
1 S8 u6 ]4 I2 V1 L6 xcles were prepubertal in size. However, testotoxicosis, \4 K0 t$ o. r( H+ W$ a
was in the differential diagnosis because his father
. ?$ E3 v1 `- U! E5 \started puberty somewhat early, and occasionally,
. O9 P4 f* @4 T8 L# Vtesticular enlargement is not that evident in the
, E! `, U a+ `! Q- t7 Ibeginning of this process.1 In the absence of a neg-
$ K! \' H9 p; P, sative initial history of androgen exposure, our
6 n, x% ]4 u- mbiggest concern was virilizing adrenal hyperplasia,3 f6 Y ]$ [6 O0 f
either 21-hydroxylase deficiency or 11-β hydroxylase
" L7 c8 a6 q% y! @( Mdeficiency. Those diagnoses were excluded by find-. @; |/ y' ], f/ |! g
ing the normal level of adrenal steroids.
6 R% C& V7 N' f% I ZThe diagnosis of exogenous androgens was strongly
' G( k4 }' T& asuspected in a follow-up visit after 4 months because
5 c' }( w% }: s4 V' I% Xthe physical examination revealed the complete disap-! y# j$ e" L( x3 }- H7 t6 f
pearance of pubic hair, normal growth velocity, and. c9 S ]8 r! b0 m1 c* W
decreased erections. The father admitted using a testos-
: n) H# J$ ?% i6 {terone gel, which he concealed at first visit. He was) P' @' k; k# t
using it rather frequently, twice a day. The Physicians’8 v8 J5 `# D! |) u7 _* c
Desk Reference, or package insert of this product, gel or& r8 A- P% j$ S5 @2 X
cream, cautions about dermal testosterone transfer to
9 Y: W3 T8 T( C9 t. B L$ Y- q9 hunprotected females through direct skin exposure.* P" a6 a: |8 I$ y0 A( L/ t
Serum testosterone level was found to be 2 times the
% y: W- g% E. ~1 wbaseline value in those females who were exposed to7 d- f4 y h' h
even 15 minutes of direct skin contact with their male! M/ H/ o0 V( j/ }+ v
partners.6 However, when a shirt covered the applica-
+ |/ H* `# C! [tion site, this testosterone transfer was prevented.
$ P+ x7 L3 M& D3 c% YOur patient’s testosterone level was 60 ng/mL,
5 d7 z& {; U$ t' p3 ]% bwhich was clearly high. Some studies suggest that
. V4 N$ m, [6 ?5 _3 Tdermal conversion of testosterone to dihydrotestos-# U5 p+ y6 f3 a5 P/ v" R$ k
terone, which is a more potent metabolite, is more
% j% W: @& |9 m! {5 uactive in young children exposed to testosterone
* E/ k3 S6 Y- K9 _. p. {exogenously7; however, we did not measure a dihy-
5 D) }5 C4 W) q. u8 Z% C# x* E$ gdrotestosterone level in our patient. In addition to
+ U( K) P7 s; g. r1 h" j; jvirilization, exposure to exogenous testosterone in
& L( |) y5 ~8 z% k; Z" X; G" tchildren results in an increase in growth velocity and6 Q. z2 x1 w2 Z% I
advanced bone age, as seen in our patient.3 w3 C) n0 Y5 w. R0 I
The long-term effect of androgen exposure during) y% J5 I6 {$ R7 Z G- R* ]" s2 i
early childhood on pubertal development and final
8 O% K" ]7 d, k0 |adult height are not fully known and always remain5 N# @' B% @2 ^( J. ]# u" _7 |
a concern. Children treated with short-term testos-
. h( B; U, X- M7 Q0 q vterone injection or topical androgen may exhibit some
- K% C d. {* A0 Y" c ~acceleration of the skeletal maturation; however, after
& `: I2 c5 L' a1 \% \7 Icessation of treatment, the rate of bone maturation
& W3 a/ S$ Y) k3 Rdecelerates and gradually returns to normal.8,9
" v) U4 D$ K$ E$ K# v$ [; V/ cThere are conflicting reports and controversy" W% t0 V; ]1 L' l
over the effect of early androgen exposure on adult. B- U7 X' Y: b1 c
penile length.10,11 Some reports suggest subnormal- m. ? f/ c& \0 O
adult penile length, apparently because of downreg-
8 H# i) X+ D/ J) I b$ a {ulation of androgen receptor number.10,12 However,( \1 F5 L/ D' s( Y- w& N J( i- {
Sutherland et al13 did not find a correlation between
# P# n% r1 ?3 tchildhood testosterone exposure and reduced adult
Q6 ~4 ]+ |: C& U9 r! m5 g/ epenile length in clinical studies. z* C8 u: M7 B" k0 B4 e8 I
Nonetheless, we do not believe our patient is
$ Z( \! y3 W" h7 ]9 l3 R+ Z! Zgoing to experience any of the untoward effects from
+ H' W* n0 z4 ]( n ^3 E. ttestosterone exposure as mentioned earlier because# i/ A3 C4 c5 F3 F: k6 N0 [
the exposure was not for a prolonged period of time.0 g ?; Y" Z2 W
Although the bone age was advanced at the time of+ |& y1 n1 g) v2 q4 a
diagnosis, the child had a normal growth velocity at" ~; L6 v z0 U, ~; N5 W. u+ L
the follow-up visit. It is hoped that his final adult: P" I! y7 b, p7 V
height will not be affected.
5 m4 P7 |: {8 _" K4 Z) t# |Although rarely reported, the widespread avail-
7 H* Z3 c) `2 g7 ~6 _ability of androgen products in our society may, } T- L# X- n
indeed cause more virilization in male or female
: R* M. V0 D, Cchildren than one would realize. Exposure to andro-% ^7 b: ~0 y5 U
gen products must be considered and specific ques-8 W8 L/ L/ \# B: S3 t2 V2 t
tioning about the use of a testosterone product or
& }5 R8 ~( q9 r3 Xgel should be asked of the family members during
1 F) m7 e9 q W+ H' q( Hthe evaluation of any children who present with vir-7 t; _7 q2 m3 m
ilization or peripheral precocious puberty. The diag- E& B( j! w, D5 c! q) g
nosis can be established by just a few tests and by
! X' Z6 o: w3 `5 w6 o' qappropriate history. The inability to obtain such a
4 w7 M, t; X) P, z8 l: J9 d$ r0 Phistory, or failure to ask the specific questions, may
/ n# C- a+ u; Kresult in extensive, unnecessary, and expensive
5 I: N' ~# O/ N* L0 q- F7 oinvestigation. The primary care physician should be, }# i( B: Y H h
aware of this fact, because most of these children
/ g2 m( U, w) E bmay initially present in their practice. The Physicians’
9 y' W# I! Z3 v2 ^& [/ K0 @0 jDesk Reference and package insert should also put a
7 D: K1 e2 R3 _5 m- }6 awarning about the virilizing effect on a male or- D1 F2 ~, ]: u- O0 m
female child who might come in contact with some-
, C. o1 r, N* ione using any of these products.
$ s( X7 ^7 }; Z- D! ^References% |" E' u2 j8 v4 Y& U: t/ k
1. Styne DM. The testes: disorder of sexual differentiation# g9 c S' h4 y) R- ]1 R8 f
and puberty in the male. In: Sperling MA, ed. Pediatric! p- G; P& n; y" f
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
+ K! y6 N% F0 D! z9 Q V2002: 565-628.
% f- T% [0 K; k" l. h2 d: q2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
* b4 b& b. ]# \( Kpuberty in children with tumours of the suprasellar pineal
3 N' G( f# _- x* oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" v! O( {+ L; m, _. x) b. ~% |
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areas: organic central precocious puberty. Acta Paediatr.
$ B7 e% }5 g$ ]. v: i1 f+ R$ r2001;90:751-756.: t, m( u- m T( t& h( }- l
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.2 U* X% O: ^. x6 \) P3 U5 e
Pediatric Endocrinology. 4th ed. New York, NY: Marcel1 j. W! @9 l$ n* l
Dekker Inc; 2003:211-238.
. q) G% m9 n' ?4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
) |8 k3 E$ q% q) Ydevelopment in a two-year-old boy induced by topical
! O# {8 l: I g' yexposure to testosterone. Pediatrics. 1999;104:e23.# E! W) _: c7 C8 w3 l, q, }
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
( J I+ t- G% }! `2 X p9 s% bSkeletal Development of the Hand and Wrist. 2nd ed.
7 t7 n6 h% v ]% yStanford, CA: Stanford University Press; 1959.3 M1 u. V9 u# T) ` }, i$ L# R ]
6. Physicians’ Desk Reference. Androgel 1% testosterone,
& g( R, X( ~$ ^! I" H2 T4 zUnimed Pharmaceutical Inc. Montvale, NJ: Medical
% _* X6 |+ ^7 e) q8 uEconomics Company, Inc; 2004:3239-3241.
. Q8 K1 u& [5 z0 t& S7 e7. Klugo RC, Cerny JC. Response of micropenis to topical
. B9 c" |) z/ n+ ^0 }testosterone and gonadotropin. J Urol. 1978;119:
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