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is a significant concern for physicians. Central
2 n" V& @! Y3 b! h' [& ?$ Eprecocious puberty (CPP), which is mediated9 i# X; T u5 b' k# P# ^2 r
through the hypothalamic pituitary gonadal axis, has
' U0 M% z, P( @. A9 z( L7 u" j3 na higher incidence of organic central nervous system7 R0 L+ T8 h& P9 v2 {
lesions in boys.1,2 Virilization in boys, as manifested
+ U9 F# m9 \- eby enlargement of the penis, development of pubic
. S# S' i+ @' t1 |2 }& Ghair, and facial acne without enlargement of testi-$ i4 ]$ B" }& }1 T, I& ]. L7 @& v
cles, suggests peripheral or pseudopuberty.1-3 We
6 q8 g K- u# f' f/ Zreport a 16-month-old boy who presented with the
2 T$ K. c% z. i) O: }% L) `: Uenlargement of the phallus and pubic hair develop-( D4 k2 h$ K$ U+ O; ]% Z! }5 S! j
ment without testicular enlargement, which was due$ e0 ^7 i, \, e0 ~
to the unintentional exposure to androgen gel used by
4 w2 i3 f) v# O' P) j) V, a; ithe father. The family initially concealed this infor-8 _: {+ o& B' O- [! ?/ G8 E
mation, resulting in an extensive work-up for this
5 n0 E3 [( U* I9 w5 U4 \; Uchild. Given the widespread and easy availability of
2 A( k& ]& Y o+ j h" |testosterone gel and cream, we believe this is proba-) {/ N. M$ [2 @1 j% ?; @
bly more common than the rare case report in the2 x1 z* }( g4 f t
literature.4
/ z" }( T% s: G+ |4 T3 mPatient Report
3 f6 y2 o2 M) g1 U {A 16-month-old white child was referred to the, Q8 H: q) }4 B) k7 F/ ?
endocrine clinic by his pediatrician with the concern+ |# ?- p4 ]: M. r+ I# |, n5 R
of early sexual development. His mother noticed
0 y! e, \% Z6 O$ Z8 Dlight colored pubic hair development when he was% F# U2 R1 y9 m" P& v- F: A' Y
From the 1Division of Pediatric Endocrinology, 2University of
" ^; l' j" q! h) ^' m" x/ O: W+ nSouth Alabama Medical Center, Mobile, Alabama.
) W& U8 w$ T6 z, t8 VAddress correspondence to: Samar K. Bhowmick, MD, FACE,
" k, a u5 K/ _5 H- J# Q( [5 mProfessor of Pediatrics, University of South Alabama, College of
; Q V; a6 Y; c/ M4 B2 F# {# l! oMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;" g; F" a+ v5 y$ @: x! s
e-mail: [email protected].
1 F7 s# z# U$ ?) E; s7 Xabout 6 to 7 months old, which progressively became# c G/ _7 z; }% a! m% [3 s
darker. She was also concerned about the enlarge-
9 c7 a' |9 d+ B! @ment of his penis and frequent erections. The child
" v! J* n; B2 f$ s8 Z2 [was the product of a full-term normal delivery, with
. A+ U, Y' V6 d3 u' S; ca birth weight of 7 lb 14 oz, and birth length of6 G7 G% i' f9 _# K
20 inches. He was breast-fed throughout the first year
" G. g% d4 G# W! J7 J5 jof life and was still receiving breast milk along with
' h& S% \1 I* G! Y( nsolid food. He had no hospitalizations or surgery,. e/ e1 `: t) n' T" g1 Z0 ^
and his psychosocial and psychomotor development0 b3 h. l! o, X# Z( U: I
was age appropriate.$ ]; L, Y/ C4 m. O2 z* \3 K) a9 _0 Y
The family history was remarkable for the father,4 H: Y. t0 {5 d) Z1 }1 ]- N
who was diagnosed with hypothyroidism at age 16,
8 d, W1 I* {) R- e6 N9 [# n1 Vwhich was treated with thyroxine. The father’s
2 _' K: ]. ]1 G" G. f* J: rheight was 6 feet, and he went through a somewhat3 N$ @# a$ J W# ^5 D; V* q; y
early puberty and had stopped growing by age 14.
& ^: A3 m* A, V2 UThe father denied taking any other medication. The5 T" h C' l1 }
child’s mother was in good health. Her menarche" ?4 b" v7 r9 l3 `0 R3 E
was at 11 years of age, and her height was at 5 feet
) X9 I" D! I3 U5 inches. There was no other family history of pre-
& q8 Z0 I# X/ Y2 B3 S! y, j- `6 m5 scocious sexual development in the first-degree rela-
/ J5 E/ s( }' H) r* wtives. There were no siblings.
5 f: p* f& |, ]4 y6 M! _Physical Examination0 ]! S6 [/ M- a1 L- R3 W+ c) N! Q+ P
The physical examination revealed a very active,0 V- o; w7 J4 ?" w6 Y C/ y6 d
playful, and healthy boy. The vital signs documented2 w( s/ n9 }" [/ H1 B
a blood pressure of 85/50 mm Hg, his length was
3 k+ p7 O3 R I" O0 N90 cm (>97th percentile), and his weight was 14.4 kg
+ a3 h' A8 g: |' o: l(also >97th percentile). The observed yearly growth
% [9 ^7 r* g* B1 K! evelocity was 30 cm (12 inches). The examination of6 \3 D# Z6 d$ M# S! g v/ R
the neck revealed no thyroid enlargement.4 f& w& `) n' k. u" d4 X7 k
The genitourinary examination was remarkable for3 ^) M9 [5 Q% G# q$ m5 l9 l
enlargement of the penis, with a stretched length of; J/ U: U7 j6 g0 _ y; V
8 cm and a width of 2 cm. The glans penis was very well
/ r% u7 E/ m2 Q4 Mdeveloped. The pubic hair was Tanner II, mostly around
) x5 p/ O( ]! U1 c) s" m540
/ b' Y2 K/ I% Bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& K, C0 \. N8 J# k Y8 D- I6 c& ~. Gthe base of the phallus and was dark and curled. The
! r# q/ R4 w& n0 J; z. D3 Stesticular volume was prepubertal at 2 mL each.
" b2 R$ d2 O, P% nThe skin was moist and smooth and somewhat
# }+ S, v+ P1 }oily. No axillary hair was noted. There were no
: [5 g2 h/ U. Q; l4 @3 j8 A$ t/ j1 _: K4 gabnormal skin pigmentations or café-au-lait spots.! H ?# i. p, ]: Y
Neurologic evaluation showed deep tendon reflex 2+
. r, }7 b3 x! Qbilateral and symmetrical. There was no suggestion
* [3 b1 B, e) k- Nof papilledema.$ _) J9 V: T- d Z
Laboratory Evaluation0 _4 B* |7 j, N
The bone age was consistent with 28 months by9 {5 j. \, ]0 c# W8 z& [
using the standard of Greulich and Pyle at a chrono-3 T- O" ^7 m0 n8 s0 i; a! I
logic age of 16 months (advanced).5 Chromosomal
% w; I k) Z3 N% s% J4 Ykaryotype was 46XY. The thyroid function test" ^6 V& J5 I) G A2 {1 K' e
showed a free T4 of 1.69 ng/dL, and thyroid stimu-4 D# w% B0 ?( v: H+ W! d4 w* u. T
lating hormone level was 1.3 µIU/mL (both normal).
+ }: Z. C: C# A; S9 q" pThe concentrations of serum electrolytes, blood* J! T8 S2 j. G) A4 _
urea nitrogen, creatinine, and calcium all were! |7 X/ V% w; {+ n5 K1 F
within normal range for his age. The concentration
- B3 l2 \' D- B, t0 E) y r6 m5 iof serum 17-hydroxyprogesterone was 16 ng/dL: X& y4 Y, ^% A8 g8 q+ P
(normal, 3 to 90 ng/dL), androstenedione was 20* Q3 O7 X9 H' k4 ]9 ]) E2 P
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-& q& \. ]+ n1 N0 q
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
; [& y- B, s& E: l& g2 p4 edesoxycorticosterone was 4.3 ng/dL (normal, 7 to
& o/ @4 K% ?! @- w' J, L49ng/dL), 11-desoxycortisol (specific compound S)- l+ L$ c7 a2 U9 W1 i
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
2 ?. R* n* r6 J* v( B5 Q9 _tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
8 T6 P$ z( \0 B% q! Ytestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
; N+ B" j B6 Cand β-human chorionic gonadotropin was less than
, [, W/ z# n7 D" W; W! g5 mIU/mL (normal <5 mIU/mL). Serum follicular
1 m# b3 n( @! h! x) Dstimulating hormone and leuteinizing hormone# |# M% X: {$ n {2 g
concentrations were less than 0.05 mIU/mL
6 I: O4 S, C5 `7 L, v/ m% @" s' B! W(prepubertal).. @9 f: A% f+ k) g
The parents were notified about the laboratory B1 S- z; a) n9 O3 l
results and were informed that all of the tests were
- ?9 E4 c+ R. \1 S& b3 e: Wnormal except the testosterone level was high. The
6 e+ [8 Q: J8 [0 I5 ~8 s. s7 x8 hfollow-up visit was arranged within a few weeks to4 K+ ?0 P) B7 h: I6 h
obtain testicular and abdominal sonograms; how-
# F' a3 f/ f% b/ M. ^9 Pever, the family did not return for 4 months.
9 m* `! D. T1 s5 v% v9 CPhysical examination at this time revealed that the$ T" i [; L0 O$ _- {$ ^+ f8 B
child had grown 2.5 cm in 4 months and had gained
# I6 A6 \1 m6 S2 kg of weight. Physical examination remained
, X y4 o9 n, Junchanged. Surprisingly, the pubic hair almost com-
$ B) |0 j% h$ P' @. Z* y8 E' Zpletely disappeared except for a few vellous hairs at
1 m" w6 f& \) C0 {( V% \& dthe base of the phallus. Testicular volume was still 2, @2 o- G- _" U; A2 \% }& `
mL, and the size of the penis remained unchanged.; M6 ?9 `1 c+ c1 ?+ C+ E
The mother also said that the boy was no longer hav-) p7 E8 N4 y2 r/ ]% E8 U! {# ~
ing frequent erections.
: T5 o3 m; {& zBoth parents were again questioned about use of7 I1 u" h( d$ C% t2 {
any ointment/creams that they may have applied to
4 U* f# z. U6 T: E: j5 B, gthe child’s skin. This time the father admitted the1 H1 z; \/ y" `% G6 S5 p. G9 R& V
Topical Testosterone Exposure / Bhowmick et al 541
. E( ?$ C4 ?* o4 z+ k/ }use of testosterone gel twice daily that he was apply-) _ d% S# M$ I ^1 E5 y w5 h
ing over his own shoulders, chest, and back area for
3 N$ S( r% T' S0 K* ?) ~a year. The father also revealed he was embarrassed
2 B) u8 X! \1 Bto disclose that he was using a testosterone gel pre-
& d( ]# T& {; h7 }- p8 {: S/ hscribed by his family physician for decreased libido
/ I( G% j. T" V! H, S0 Vsecondary to depression.& z! ~4 _: ]+ \6 L( {* T3 N
The child slept in the same bed with parents.
( `8 I7 t" I' f4 |$ X* NThe father would hug the baby and hold him on his
8 G& J6 m0 q" S9 ochest for a considerable period of time, causing sig-% v6 C% H4 P5 U* k
nificant bare skin contact between baby and father.
) K# f, f# d/ I7 t2 Z' uThe father also admitted that after the phone call,9 N9 c0 L# h/ W- J7 X9 P
when he learned the testosterone level in the baby; l0 I! Q0 U5 F! `& L
was high, he then read the product information
, r" Z. a/ L, D! ipacket and concluded that it was most likely the rea-
1 p$ i0 Y7 R# ~" Xson for the child’s virilization. At that time, they, G% b5 X. u% v/ v
decided to put the baby in a separate bed, and the
. @7 j- \' R3 C" t( Y0 Cfather was not hugging him with bare skin and had
+ Y. b1 y9 E/ \: vbeen using protective clothing. A repeat testosterone
; n9 c$ t0 Z9 ~9 U1 r4 }- utest was ordered, but the family did not go to the
. }1 y* F2 Y3 H' R( Z, j* A/ e6 ?; ulaboratory to obtain the test.2 k$ S! g, {! _/ N O2 O
Discussion- _6 E8 \$ ~' ]
Precocious puberty in boys is defined as secondary
2 `! `6 v3 A* Y5 v: zsexual development before 9 years of age.1,47 P1 Z3 C- ~$ D* [6 G6 R
Precocious puberty is termed as central (true) when3 ~5 m; {# o, Z' E, J2 V. N! y
it is caused by the premature activation of hypo-+ H1 k0 S6 K" L/ r5 r
thalamic pituitary gonadal axis. CPP is more com-2 V8 s0 z, X" \; n; T
mon in girls than in boys.1,3 Most boys with CPP
3 H4 w- e# M7 F: Kmay have a central nervous system lesion that is
# D. v. [! a' u' D0 ~responsible for the early activation of the hypothal-' c, j; p2 s' G5 s; _. B
amic pituitary gonadal axis.1-3 Thus, greater empha- p8 L0 l1 M3 E V- C
sis has been given to neuroradiologic imaging in$ Z7 g" g" s& W2 b' [: u
boys with precocious puberty. In addition to viril-( n+ L$ q& G5 _
ization, the clinical hallmark of CPP is the symmet-) Q, z' d! Z9 p0 M" x
rical testicular growth secondary to stimulation by6 n, _2 ^9 H4 ]& d8 s2 A5 P
gonadotropins.1,3
7 a/ D- ]. I- aGonadotropin-independent peripheral preco-
- m9 {* B9 t! N% y ocious puberty in boys also results from inappropriate
0 i; k; t" C1 y, l1 ~& N3 C- X9 Aandrogenic stimulation from either endogenous or
F1 p$ i! C9 l6 ^7 k" K4 Nexogenous sources, nonpituitary gonadotropin stim-
) A+ O( l# N* }4 A0 C1 ?9 Culation, and rare activating mutations.3 Virilizing
. H K7 ^; c7 B& C5 xcongenital adrenal hyperplasia producing excessive
3 W( _ y8 i' L Q3 u; a: Y4 b0 Zadrenal androgens is a common cause of precocious0 j/ K- N9 P. D( ~
puberty in boys.3,4$ `: S: F' G# A) d
The most common form of congenital adrenal S8 I" S4 ~( d2 D
hyperplasia is the 21-hydroxylase enzyme deficiency.$ k- T) |, r* \$ A2 u( l
The 11-β hydroxylase deficiency may also result in) {% T0 Z2 l* [6 p N' U
excessive adrenal androgen production, and rarely,6 j: ]" t1 r2 t1 X
an adrenal tumor may also cause adrenal androgen9 P+ @1 ?; [ k* N
excess.1,3
! j9 @4 ^% F3 s( Z, t' R2 Hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
3 J C1 C3 U$ G& [9 V7 R7 M6 T542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
9 f# R x! |) F3 t9 l; a0 i RA unique entity of male-limited gonadotropin-
) u: h1 D# U) W6 G4 K# gindependent precocious puberty, which is also known
& K) i. T! a: W7 F; ?as testotoxicosis, may cause precocious puberty at a4 q/ d8 u0 w( Z2 E( d& m1 D6 q0 I
very young age. The physical findings in these boys
4 C2 M, u; i% Q1 zwith this disorder are full pubertal development,
# S' X/ X! M) Q- ^6 o. yincluding bilateral testicular growth, similar to boys
# _2 E8 Z0 ?) ` xwith CPP. The gonadotropin levels in this disorder
4 s z: q6 t. d: |4 U9 Q, J. Dare suppressed to prepubertal levels and do not show+ X( x- f3 q4 ]! N5 v
pubertal response of gonadotropin after gonadotropin-" Z; M# i" a5 s2 n* l
releasing hormone stimulation. This is a sex-linked
- O' |& Y+ m+ f" u. lautosomal dominant disorder that affects only9 x) `) Z$ N- s
males; therefore, other male members of the family
/ ?" ?( b( I$ s% z) Jmay have similar precocious puberty.3& _) f! u* ?4 t0 O4 x! [9 X& Y
In our patient, physical examination was incon-1 c( Q. q" D1 V9 X
sistent with true precocious puberty since his testi-' q2 e' Y/ g& b- P% k! X
cles were prepubertal in size. However, testotoxicosis
2 t$ u/ o, `2 F1 t4 N& X) m- ]was in the differential diagnosis because his father
9 D5 X$ }6 g+ P, d% U! a2 r' Istarted puberty somewhat early, and occasionally,
5 G7 G* e1 f" Ytesticular enlargement is not that evident in the
; j8 C3 X3 `; U- \; d2 L8 qbeginning of this process.1 In the absence of a neg-+ S* E+ A1 A/ Q* c
ative initial history of androgen exposure, our3 _% r) L$ ~1 g" D8 n) V/ u
biggest concern was virilizing adrenal hyperplasia,
$ \, M& V* E. i; b9 seither 21-hydroxylase deficiency or 11-β hydroxylase
. Y s/ _: p" K9 E3 [deficiency. Those diagnoses were excluded by find-
7 `, r6 ^* v6 D2 y( e7 V3 Sing the normal level of adrenal steroids.
- S# y- Y! {! h! L) t* Q) gThe diagnosis of exogenous androgens was strongly4 \" M: l2 u. W4 ^; w9 W
suspected in a follow-up visit after 4 months because
8 ^2 M( N. A+ ?. Y/ u' @the physical examination revealed the complete disap-. @/ J+ J8 W; u1 b/ s( k
pearance of pubic hair, normal growth velocity, and
3 y) ^) p3 j- u; {! G) idecreased erections. The father admitted using a testos-
$ V* |( R# o+ h, P4 B: K; pterone gel, which he concealed at first visit. He was* O* S' b( w% h) o# w" Q& M
using it rather frequently, twice a day. The Physicians’
$ n$ Z! e9 W4 Z9 E. y# O oDesk Reference, or package insert of this product, gel or9 J( u- f! D8 o) |6 K0 L6 |
cream, cautions about dermal testosterone transfer to
2 C0 s! v% z2 {1 I0 C6 |" @unprotected females through direct skin exposure., o& U# s8 w* _; {- M3 u
Serum testosterone level was found to be 2 times the
+ F+ H7 C1 O% p) l" q3 c. sbaseline value in those females who were exposed to/ c7 C8 R' ?; `
even 15 minutes of direct skin contact with their male
. Z g' h' E' V4 M( _partners.6 However, when a shirt covered the applica-+ V6 f* g- x0 a( Q5 G8 k
tion site, this testosterone transfer was prevented.
" _( o& E z& W1 xOur patient’s testosterone level was 60 ng/mL,
. q% A$ G$ O6 g" q" K; X" Ewhich was clearly high. Some studies suggest that0 w1 y- g1 |; O" s) y
dermal conversion of testosterone to dihydrotestos-
+ v2 m' ]7 T1 p/ xterone, which is a more potent metabolite, is more
: F, N: S/ t6 K: @active in young children exposed to testosterone
$ c2 M- w+ f9 w: X- i: _* sexogenously7; however, we did not measure a dihy-, b7 l2 v5 F2 S& D
drotestosterone level in our patient. In addition to+ K0 g! W2 s' s3 h
virilization, exposure to exogenous testosterone in
& S$ d; ]- q/ _% g" \5 n+ mchildren results in an increase in growth velocity and
6 a1 l- c2 v# K0 Z% |- Madvanced bone age, as seen in our patient.
! q' T6 G7 q% _3 _$ {The long-term effect of androgen exposure during
' U4 s' {3 l7 } Pearly childhood on pubertal development and final! Y# R* S) J6 P. A) T
adult height are not fully known and always remain* T a' L: n* r5 z. P5 B1 q% F
a concern. Children treated with short-term testos-8 J+ @+ e' F$ P3 ?
terone injection or topical androgen may exhibit some
3 S7 D: `' }/ r; d' h, Zacceleration of the skeletal maturation; however, after
2 z# |) R8 n! f4 g) e& Hcessation of treatment, the rate of bone maturation# P2 a% I# z1 K6 [! Q0 `% J
decelerates and gradually returns to normal.8,9
2 s2 O2 a A2 x; | \/ cThere are conflicting reports and controversy8 S2 B: Q8 T6 _2 V" _2 ~
over the effect of early androgen exposure on adult
: W5 m+ w# K' t4 E3 d4 ]) ypenile length.10,11 Some reports suggest subnormal
' v n: {6 A6 C$ [( {adult penile length, apparently because of downreg-
4 ]0 E+ F6 ^! vulation of androgen receptor number.10,12 However,
4 Y) @2 J7 w% fSutherland et al13 did not find a correlation between' [1 J& u9 \# g( W+ o
childhood testosterone exposure and reduced adult- ]9 u2 P7 ^$ y$ ?5 o9 q7 Q
penile length in clinical studies.6 \; N- n5 y. ~- x E5 b1 ^# C
Nonetheless, we do not believe our patient is
* C/ J/ H$ G) x7 e; B# ?going to experience any of the untoward effects from5 |# Z1 X# h6 u+ w
testosterone exposure as mentioned earlier because) s" x% u+ l+ g3 _8 q
the exposure was not for a prolonged period of time.
7 }5 P; n+ E( m; F* z9 `Although the bone age was advanced at the time of# I; h1 {0 L# M' S) z; l2 U
diagnosis, the child had a normal growth velocity at
+ y% K% l6 P8 @7 ]the follow-up visit. It is hoped that his final adult* D, f: P" Q4 l. f9 B& X
height will not be affected.+ S' X7 U1 o) h
Although rarely reported, the widespread avail-, {6 W! |( j: M# U
ability of androgen products in our society may9 n; R& ~5 z9 z' q$ t5 K
indeed cause more virilization in male or female+ j9 j+ Y! w7 O2 `9 z
children than one would realize. Exposure to andro-$ ^2 V% i3 \+ B5 |+ Q+ m0 b; x4 R
gen products must be considered and specific ques-
- V$ x- ]; B! }. O4 J7 S& r+ o4 Wtioning about the use of a testosterone product or* y3 e6 J8 B: f
gel should be asked of the family members during# T5 z! N, s& ~: M/ V9 H
the evaluation of any children who present with vir-7 v0 m9 _! b) @" ?; H; D
ilization or peripheral precocious puberty. The diag-/ S9 K' @) g' q/ Z6 B" k p2 u
nosis can be established by just a few tests and by
. U9 u' ^- z. tappropriate history. The inability to obtain such a# A8 I% z* Y$ \4 p
history, or failure to ask the specific questions, may ^2 C. J8 O/ W$ K
result in extensive, unnecessary, and expensive1 p2 f+ @. }2 I
investigation. The primary care physician should be
& N1 r6 w: L2 ]4 U; T x+ jaware of this fact, because most of these children
, j/ I4 S* t* | N, l- Omay initially present in their practice. The Physicians’
6 y5 b' m1 r4 X! l4 eDesk Reference and package insert should also put a
1 I/ M; c7 R3 Uwarning about the virilizing effect on a male or v. m! X: S3 ?" o$ r
female child who might come in contact with some-; R: I5 V0 R0 Y6 q
one using any of these products.- Z, M8 X/ k1 q
References6 `7 [" J$ ~; W: R
1. Styne DM. The testes: disorder of sexual differentiation
( u8 z+ g, n* Tand puberty in the male. In: Sperling MA, ed. Pediatric6 S: {0 w% D h$ C4 p: l- o( ]( J5 @
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;* b% O F+ G' D' B2 b/ r, H( C& ]
2002: 565-628.
4 \4 B0 {, K% n& L' ^( s) r2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious; C5 G; X/ @6 `8 Y
puberty in children with tumours of the suprasellar pineal
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& Z" u3 ?: }: ?" e3 GTopical Testosterone Exposure / Bhowmick et al 543
9 {' c7 T+ \# Q) b" careas: organic central precocious puberty. Acta Paediatr.
' _, E: w( o; r6 h7 N2001;90:751-756.
7 q6 T' i* l2 l5 ?3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.$ o& }: O. h' B7 v. O: w% G! F
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
( l0 N. z3 [) x& b4 E. h/ kDekker Inc; 2003:211-238./ Z' [4 O: n7 Z2 S
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
% b7 I- X% k9 Z3 P. bdevelopment in a two-year-old boy induced by topical
/ T9 \( _! X8 Q( O) A+ e8 p) Jexposure to testosterone. Pediatrics. 1999;104:e23.1 g0 R- _) x* e* M( `/ }. `" y
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
; N* E/ T2 J5 |5 ^. R* `- ^Skeletal Development of the Hand and Wrist. 2nd ed.
( G4 F5 y2 q* H+ n$ GStanford, CA: Stanford University Press; 1959.
: O3 W9 h' Z& V5 n5 @* _0 Q$ H6. Physicians’ Desk Reference. Androgel 1% testosterone,# h4 {1 [0 X4 q+ V* [2 i5 i
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
0 s" K/ e3 T6 jEconomics Company, Inc; 2004:3239-3241.
8 H& k, Y& M n1 n; M& s7. Klugo RC, Cerny JC. Response of micropenis to topical& @) g# c6 ?- G! j
testosterone and gonadotropin. J Urol. 1978;119:
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