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is a significant concern for physicians. Central+ W. ^2 g$ t! d+ J
precocious puberty (CPP), which is mediated5 \0 [! s( C$ @$ z$ L: ]
through the hypothalamic pituitary gonadal axis, has/ H4 n/ _* g1 ^& O
a higher incidence of organic central nervous system
8 v9 f8 a( J: Z* A( F; Vlesions in boys.1,2 Virilization in boys, as manifested0 @* L, O6 \2 u) J4 C1 M% T
by enlargement of the penis, development of pubic" _( C1 q" v/ Y% C# A
hair, and facial acne without enlargement of testi-
: n8 y* A6 O: R7 A. lcles, suggests peripheral or pseudopuberty.1-3 We3 v1 \0 V# R: j- k
report a 16-month-old boy who presented with the2 @7 A/ O2 J$ x5 m4 `
enlargement of the phallus and pubic hair develop-
5 c* m4 z+ I* B7 ^2 C( m, [ment without testicular enlargement, which was due
( d* S: g4 U9 b& K$ a5 z7 zto the unintentional exposure to androgen gel used by2 S; o" h+ k% p; `* V! M' X" z. l
the father. The family initially concealed this infor-
6 Q' C" [5 H4 nmation, resulting in an extensive work-up for this; e- `% r1 V) `: ^) u+ D
child. Given the widespread and easy availability of
5 s, g8 K" L" q! C* j; etestosterone gel and cream, we believe this is proba-
D3 j( U$ j) z B9 R/ sbly more common than the rare case report in the
3 j! P/ i+ b# E, V* ]/ dliterature.4" j, M8 N1 d, \5 @5 I( U0 b
Patient Report
$ a4 M7 n& ?* q k" k1 [$ ^7 wA 16-month-old white child was referred to the
7 v8 Y+ W) h+ L6 z+ y7 a4 @4 Dendocrine clinic by his pediatrician with the concern# a. z. i2 z2 y4 ~: q' c8 V
of early sexual development. His mother noticed
4 {" `' k5 c+ x3 z3 llight colored pubic hair development when he was7 Y: s/ P& l% c( m7 Z
From the 1Division of Pediatric Endocrinology, 2University of" N; _, T& ]3 b1 H) J( J
South Alabama Medical Center, Mobile, Alabama.
5 Y1 {% U9 h/ ?Address correspondence to: Samar K. Bhowmick, MD, FACE,
" k9 \% d- S3 J" T+ a$ BProfessor of Pediatrics, University of South Alabama, College of
. K" v) R7 J7 u kMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
& ^- k7 p2 C6 e g# we-mail: [email protected].
" `1 T' ]# M4 vabout 6 to 7 months old, which progressively became. k. Q$ n- ]* ]# j) C5 e+ Q
darker. She was also concerned about the enlarge-2 V4 C8 J% n9 v$ Y. `! J' J4 J
ment of his penis and frequent erections. The child$ ~4 Q. [1 t5 c. B8 \8 N; n& Y' j
was the product of a full-term normal delivery, with0 p) u* p6 Y+ @
a birth weight of 7 lb 14 oz, and birth length of+ ^2 _$ e S. U0 y, n4 K
20 inches. He was breast-fed throughout the first year/ r! G' d }2 ^( m7 o) j6 \& y) P9 i
of life and was still receiving breast milk along with5 x* X! B& q8 z; a
solid food. He had no hospitalizations or surgery, E l( D2 |% H& K: H: _' Z0 g
and his psychosocial and psychomotor development9 c/ @) _$ C1 w& q3 z
was age appropriate.
- r3 Q8 U a# D" m. Y* ZThe family history was remarkable for the father,
0 M8 T1 ], v% A! [4 S4 l* X$ Q" wwho was diagnosed with hypothyroidism at age 16,1 K. b8 ~6 ]& P1 E4 `+ ^1 {
which was treated with thyroxine. The father’s
/ q" E; g6 o4 ^7 X( sheight was 6 feet, and he went through a somewhat- C3 {3 g8 ~* K. Z7 |& V
early puberty and had stopped growing by age 14." _& T+ t% n3 ~. Z
The father denied taking any other medication. The
2 O1 O$ O n' f: T1 v# X3 J9 nchild’s mother was in good health. Her menarche& ~) }4 r2 M g: F% @) j9 L) C i
was at 11 years of age, and her height was at 5 feet
/ c6 T4 r% d( G; Q2 j5 inches. There was no other family history of pre-
' d5 c/ \) D+ Vcocious sexual development in the first-degree rela-
" D5 r! O6 j- i- Utives. There were no siblings.
8 r3 V* x; C2 o- s N' IPhysical Examination
/ z6 k1 x2 E+ |$ Z5 ~2 P. lThe physical examination revealed a very active,
% d: X" g' n4 ~9 O3 j& Bplayful, and healthy boy. The vital signs documented, a. R" D- b Y0 Q$ j9 Y+ y
a blood pressure of 85/50 mm Hg, his length was7 X) g3 [8 r: g& y) h8 v& {
90 cm (>97th percentile), and his weight was 14.4 kg. y0 \; B& m) U: h6 c, F8 k9 x
(also >97th percentile). The observed yearly growth
7 A, q0 P( r! T' u, D2 t" vvelocity was 30 cm (12 inches). The examination of+ S1 b6 f* d) X; m: ]* f
the neck revealed no thyroid enlargement.
9 X- r! a# S8 I0 }The genitourinary examination was remarkable for1 x* J0 z5 J0 |- O5 ^; q
enlargement of the penis, with a stretched length of
# F' O3 x5 _7 Z9 u, O5 q6 \1 I8 cm and a width of 2 cm. The glans penis was very well9 c0 _2 V5 L: G: a/ e9 l: H! q
developed. The pubic hair was Tanner II, mostly around
, T5 W/ f i- [$ Q. b# v' G9 K540
# M* R+ e- I# W P) hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from, z. l1 c9 a, p f: D: B
the base of the phallus and was dark and curled. The
6 t2 V, _2 ?" E! K3 @; E" W( [+ z3 @! Qtesticular volume was prepubertal at 2 mL each.7 F/ o8 I7 U2 r; i
The skin was moist and smooth and somewhat- v% }" P: a$ t2 [+ h
oily. No axillary hair was noted. There were no- x; F6 y& ?& v3 h
abnormal skin pigmentations or café-au-lait spots.9 g" [% k M& p3 N
Neurologic evaluation showed deep tendon reflex 2+& b4 R! p- }5 S/ t% y$ M2 T; Y
bilateral and symmetrical. There was no suggestion
, i& l- Y+ \: D2 wof papilledema.( r" i6 F6 V6 m9 B, A( X, x& U
Laboratory Evaluation
4 T& |1 Y h7 ?3 Y/ R" W3 gThe bone age was consistent with 28 months by
4 y+ r, t0 g" H, P4 k" W, I9 susing the standard of Greulich and Pyle at a chrono-
4 g$ h, s; A8 ~$ t* Llogic age of 16 months (advanced).5 Chromosomal
) N; A- G* ~0 Rkaryotype was 46XY. The thyroid function test+ Z. {3 {" T+ w" W
showed a free T4 of 1.69 ng/dL, and thyroid stimu-7 N0 f1 d/ p Z# i0 C5 R8 L
lating hormone level was 1.3 µIU/mL (both normal).+ o. q/ V! V9 R# q5 {
The concentrations of serum electrolytes, blood
* F# \$ I, H, s1 |4 l2 I" w! zurea nitrogen, creatinine, and calcium all were
$ P9 F1 o6 C$ ]8 O1 I' Zwithin normal range for his age. The concentration
4 ^1 N6 X3 ~0 I/ m4 n' r: t# `of serum 17-hydroxyprogesterone was 16 ng/dL1 r4 t* w$ q' R
(normal, 3 to 90 ng/dL), androstenedione was 20
! k! s' u' v9 b+ P2 Jng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-( I9 H& g) w0 p. |) j/ f }# u) k
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
% G8 T" `% O. Ldesoxycorticosterone was 4.3 ng/dL (normal, 7 to5 |6 Z1 ~1 ]% L! _* }
49ng/dL), 11-desoxycortisol (specific compound S)/ J4 |( v' \5 u9 E7 Z* d
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
) J8 W, w* z6 t p& wtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total: S* Q# h: }! o8 o
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),6 d$ s c6 _) y* D
and β-human chorionic gonadotropin was less than
. m R' U5 F/ ~- }8 R5 mIU/mL (normal <5 mIU/mL). Serum follicular
5 I; _; T3 C% X- m$ r! kstimulating hormone and leuteinizing hormone1 P5 z9 j* A) j8 r
concentrations were less than 0.05 mIU/mL
$ w; S$ i- G3 O7 Q- N- {(prepubertal).; O% F1 j: \3 C- z% h" i& ?4 p5 _) u
The parents were notified about the laboratory
6 W; p6 ], g2 p! N/ presults and were informed that all of the tests were- D; ^. M0 L6 b
normal except the testosterone level was high. The
0 b: Z* l' D/ m& O7 Tfollow-up visit was arranged within a few weeks to
: Q7 k) D3 z9 c+ fobtain testicular and abdominal sonograms; how-$ E. n1 b: r( T9 A! k' I# N+ E! H
ever, the family did not return for 4 months.4 r# n& w" r2 m. q @ ]
Physical examination at this time revealed that the ?! n5 {6 z$ `0 X
child had grown 2.5 cm in 4 months and had gained
4 h# l, E6 s9 D+ h8 Y; l2 kg of weight. Physical examination remained2 s8 I7 F* m: C6 t9 y0 J
unchanged. Surprisingly, the pubic hair almost com-
0 Z. i1 I# @& D5 R' b, X! _pletely disappeared except for a few vellous hairs at
" H* ^ c9 e8 {! H' |' pthe base of the phallus. Testicular volume was still 2: r" P* o% z# n& R' v% d2 J: W6 r- s
mL, and the size of the penis remained unchanged." _" q% f" x% @6 @/ t3 Q
The mother also said that the boy was no longer hav-
% k& b+ }+ x2 }' a% O: K) ying frequent erections.
0 s1 j h, M0 K# S: lBoth parents were again questioned about use of+ i' g- g* b, H; ]* R( W* j$ m
any ointment/creams that they may have applied to1 N' @) U+ `, Z+ u1 c
the child’s skin. This time the father admitted the- G. S4 m$ D5 b0 V6 s
Topical Testosterone Exposure / Bhowmick et al 541, d/ @2 q8 M) i
use of testosterone gel twice daily that he was apply- Q! y ^& n" `6 d. I
ing over his own shoulders, chest, and back area for
+ _+ i6 k. e$ k1 Z& m: Z+ Ja year. The father also revealed he was embarrassed4 }& {! C- {2 X9 Q$ T1 g
to disclose that he was using a testosterone gel pre-5 X+ ^0 G' W$ y: E6 `9 i$ S6 G+ S
scribed by his family physician for decreased libido p) W) }/ \" [3 W9 }
secondary to depression.
( f: h8 }6 K8 n AThe child slept in the same bed with parents./ l$ P; |/ \8 J
The father would hug the baby and hold him on his, l7 i/ O5 a: f- R( W. C! e
chest for a considerable period of time, causing sig-
/ c' V2 X( q( C7 B. d1 g2 anificant bare skin contact between baby and father.
; z7 X5 J1 O) z0 _( ^/ H- QThe father also admitted that after the phone call,
9 v/ ]- B$ w& D) k7 E1 Ywhen he learned the testosterone level in the baby% c' {! Y% K3 B, H# s5 K4 n
was high, he then read the product information, |6 B' @. f) I6 z R$ P3 K3 q4 u4 n
packet and concluded that it was most likely the rea-. M# r( e7 E5 z
son for the child’s virilization. At that time, they v. S8 S. |5 P' \/ b9 p; `
decided to put the baby in a separate bed, and the
0 ` G9 l p- Lfather was not hugging him with bare skin and had$ w$ E2 d3 K, X4 I
been using protective clothing. A repeat testosterone9 `$ ^* i$ W; z% b
test was ordered, but the family did not go to the
% D! ]: N- ?6 z& G2 D/ ]9 P$ i! blaboratory to obtain the test.
7 c! V, g N* W( D0 q3 O7 l+ WDiscussion
9 u( D% {# O; [$ K% n8 VPrecocious puberty in boys is defined as secondary* V+ q+ F$ Q- _9 y0 }& B
sexual development before 9 years of age.1,4% |4 K# s! ~. e
Precocious puberty is termed as central (true) when
?& D P9 p# d$ m- F# |it is caused by the premature activation of hypo-
6 M, y/ i3 ]/ Q1 Jthalamic pituitary gonadal axis. CPP is more com-
. S' W+ ^2 d8 cmon in girls than in boys.1,3 Most boys with CPP1 i+ G X5 O: w6 z% c; q
may have a central nervous system lesion that is$ W0 R# q! z- }! E$ r
responsible for the early activation of the hypothal-8 J/ V3 V# {4 N0 |
amic pituitary gonadal axis.1-3 Thus, greater empha-& e6 l* _6 C4 M- [7 |: S
sis has been given to neuroradiologic imaging in
+ u) J& }" T* u. e, q$ _boys with precocious puberty. In addition to viril-2 H% P5 C+ I" L2 K/ I
ization, the clinical hallmark of CPP is the symmet-
, G: p/ a- ? o! T6 Q7 T: Q0 mrical testicular growth secondary to stimulation by
( q9 O' Z. |& O, pgonadotropins.1,3
5 N2 ]' w% K( y, T& |Gonadotropin-independent peripheral preco-
, A* c3 j" f4 t2 w! I' tcious puberty in boys also results from inappropriate8 p* c l' _! m0 M
androgenic stimulation from either endogenous or- n. N# u0 n: h2 ~+ i
exogenous sources, nonpituitary gonadotropin stim-! y3 t) E, O: s& e$ {
ulation, and rare activating mutations.3 Virilizing8 G5 k8 _+ x0 ~$ s6 _* }, E
congenital adrenal hyperplasia producing excessive
: Z# W; d7 U, {adrenal androgens is a common cause of precocious
! ]% j o- d4 N9 A5 npuberty in boys.3,4& ? ]" f# B1 C: s$ l
The most common form of congenital adrenal7 y1 \5 y- ~* D
hyperplasia is the 21-hydroxylase enzyme deficiency.+ r' ^# F" N3 ] T" k( ]
The 11-β hydroxylase deficiency may also result in
9 b8 h1 C7 L2 Z& ~- Vexcessive adrenal androgen production, and rarely," f8 J8 z0 }8 X; s
an adrenal tumor may also cause adrenal androgen9 _" _! }9 h* i9 V5 |& D
excess.1,3
" Z* u! c" @ j" yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
6 t' O- J, o6 O$ @542 Clinical Pediatrics / Vol. 46, No. 6, July 2007. F: l' Q% i9 I/ b5 ^
A unique entity of male-limited gonadotropin-, ^; |( t! C8 U. D5 K- g3 U
independent precocious puberty, which is also known8 f& X" L" ^7 i( @/ h, t6 ` P
as testotoxicosis, may cause precocious puberty at a' B& l" t' R3 g- g( Z" D& |
very young age. The physical findings in these boys4 j5 d. I3 v. @; A2 W2 B
with this disorder are full pubertal development,+ ]0 E3 r# j2 g# q; O. H
including bilateral testicular growth, similar to boys
0 N* I+ q+ f, ]( k7 F/ t9 {with CPP. The gonadotropin levels in this disorder" G! D, s6 g& b
are suppressed to prepubertal levels and do not show
: C- j( C* n! J: `% P( Mpubertal response of gonadotropin after gonadotropin-
0 R! _# r4 H2 U' sreleasing hormone stimulation. This is a sex-linked
( z/ h) T+ \, r3 |! _autosomal dominant disorder that affects only
) L/ z! ]$ ]4 o3 F3 L) Imales; therefore, other male members of the family' T l2 C8 s, n" \( g0 h) A
may have similar precocious puberty.3, q6 ~4 `* w. K# c' E
In our patient, physical examination was incon-
C9 o) z' ^, T* rsistent with true precocious puberty since his testi-& o3 o. C" o' y, A z1 l) W! u8 O
cles were prepubertal in size. However, testotoxicosis6 |, O3 G% }' L& m" C" h
was in the differential diagnosis because his father
4 |) O' X. B5 d* Y4 Mstarted puberty somewhat early, and occasionally,
, }3 z) u) P& i. r6 Otesticular enlargement is not that evident in the
3 N; P! F6 X% V" sbeginning of this process.1 In the absence of a neg-
# Y0 N0 s: ?5 A1 Q5 N. r3 kative initial history of androgen exposure, our
& ~5 C6 H9 u6 S9 `1 D a% ~. r9 Abiggest concern was virilizing adrenal hyperplasia,
/ r, j; K5 @% ~# Keither 21-hydroxylase deficiency or 11-β hydroxylase' \% g1 ]2 P: m1 H9 v5 M" ?5 ?, u
deficiency. Those diagnoses were excluded by find-( I M) J$ U; `) l8 o; q* v
ing the normal level of adrenal steroids.4 h. K) ?/ G/ U( Z: Q
The diagnosis of exogenous androgens was strongly
+ N) ^, S# H: v. k1 Rsuspected in a follow-up visit after 4 months because
9 `/ v' t4 j, [/ V: Athe physical examination revealed the complete disap-
. l4 Z' X% G$ _0 y0 P1 Fpearance of pubic hair, normal growth velocity, and
& `) Q( E3 S7 Y3 `/ z; [decreased erections. The father admitted using a testos-; e3 v- B6 A) V
terone gel, which he concealed at first visit. He was
8 M6 u" f+ T$ `: A4 musing it rather frequently, twice a day. The Physicians’
6 T+ ]) Y& R, \Desk Reference, or package insert of this product, gel or6 x- S+ j4 J3 ^5 |2 p( _# w6 f/ @$ \
cream, cautions about dermal testosterone transfer to
: s0 \3 o+ p( D& m5 z0 H4 `unprotected females through direct skin exposure.
9 t7 N {; h3 {2 cSerum testosterone level was found to be 2 times the
: y- |$ U) j) ^- v# x/ U) F( U* Qbaseline value in those females who were exposed to
4 K7 d' M* S; h. ~even 15 minutes of direct skin contact with their male: V2 p! R+ ]) S8 [/ n0 J
partners.6 However, when a shirt covered the applica-- t1 q/ M2 m6 J6 }3 z& \
tion site, this testosterone transfer was prevented.
3 c" v, y" y) d. S9 W1 b2 k+ COur patient’s testosterone level was 60 ng/mL,
) ]8 ^4 J" N; F6 [. p2 Nwhich was clearly high. Some studies suggest that
: c; @( n* F3 u( Idermal conversion of testosterone to dihydrotestos-
7 _1 X" }' p% e* p/ U0 Uterone, which is a more potent metabolite, is more
8 ^" I; K% v \$ gactive in young children exposed to testosterone# ^7 ?$ e: r/ K/ L" @: Y# K' x
exogenously7; however, we did not measure a dihy-
# s. I" e k: s& k% Udrotestosterone level in our patient. In addition to
8 b& `: e) h+ |/ i0 Kvirilization, exposure to exogenous testosterone in7 A* l7 t/ H: q' X. X$ Y
children results in an increase in growth velocity and& u9 ?- ]3 ]( u: s# U/ I4 G- I/ }
advanced bone age, as seen in our patient.# u) E2 Q7 G0 x9 A, x. d9 S
The long-term effect of androgen exposure during' Y6 k/ l- W0 y5 ?( a
early childhood on pubertal development and final
/ t: y" p5 k1 H; C' Nadult height are not fully known and always remain
2 `6 w0 i# j2 J6 q5 t3 Qa concern. Children treated with short-term testos-7 Z2 F, e U, Y8 a
terone injection or topical androgen may exhibit some
* D8 O& {0 k8 N: \( o/ cacceleration of the skeletal maturation; however, after
) a6 I3 G0 b" ?cessation of treatment, the rate of bone maturation
3 s) l% k9 M, R$ ~. ]decelerates and gradually returns to normal.8,9% M4 j' ^5 e! F. k. J
There are conflicting reports and controversy
Z3 A* e2 ^; o6 U7 qover the effect of early androgen exposure on adult
( c' X ] }- [penile length.10,11 Some reports suggest subnormal9 f( T8 k" Q0 U9 A# C- g
adult penile length, apparently because of downreg-
! o# A* [4 o3 t2 e- U$ O/ V {ulation of androgen receptor number.10,12 However,
4 c( S0 C9 `3 _8 f) o1 X# E7 ^7 v2 G' }Sutherland et al13 did not find a correlation between5 Q0 P! h6 {: K* b+ N8 w3 a8 B
childhood testosterone exposure and reduced adult) J3 D* e; K E& O+ l
penile length in clinical studies.
9 [ U/ ~* u3 J: Z- h) BNonetheless, we do not believe our patient is' z% H. ~8 ]% s/ E
going to experience any of the untoward effects from
" u0 |# I& @/ S, xtestosterone exposure as mentioned earlier because
; C+ E$ S' Y7 s7 W- [- V5 @the exposure was not for a prolonged period of time.- _9 R4 t W) K- S! k) C" x
Although the bone age was advanced at the time of
5 f# `8 v. O7 g. K" i$ R# p5 Pdiagnosis, the child had a normal growth velocity at$ |: R! ]$ E+ z3 i# |' `. \
the follow-up visit. It is hoped that his final adult! l8 r ?# G+ \0 H9 q
height will not be affected.' T: Z- \& D: E1 ^/ U( W% s
Although rarely reported, the widespread avail-
2 \, k/ [7 F+ |4 B( n- @ability of androgen products in our society may
1 T( n/ B/ z7 M" [indeed cause more virilization in male or female
8 X3 o* J8 l4 q/ _5 Y' i4 [, ^7 \children than one would realize. Exposure to andro-0 q- I9 r g# n* f3 B" u! s% D
gen products must be considered and specific ques-
+ b9 v3 m+ R' K3 ~% |: }' i" L) Ptioning about the use of a testosterone product or
# U3 T/ k: j3 p! X, vgel should be asked of the family members during
* K$ M" p: V- s( A" q0 D) }the evaluation of any children who present with vir-
; d, f" r( S8 d: }! [+ a y" D9 Oilization or peripheral precocious puberty. The diag-
1 B& n, W/ V8 o/ s, C6 }% @. wnosis can be established by just a few tests and by
, ], q6 c* _; s: `9 `appropriate history. The inability to obtain such a
6 L! C6 J* o" m* V7 [+ Qhistory, or failure to ask the specific questions, may
! E1 p9 Z- D3 y3 O9 N( ]result in extensive, unnecessary, and expensive
5 s8 W5 e1 N4 M" [+ xinvestigation. The primary care physician should be
% u7 @7 {1 A8 R. s7 ^$ Y8 ^aware of this fact, because most of these children+ r. r" G! K$ K7 u$ j
may initially present in their practice. The Physicians’
+ f; @# e( ^' }$ x6 t# ~1 I, i. n, eDesk Reference and package insert should also put a
4 r! s8 w4 }+ B5 h# @! k. H* Ywarning about the virilizing effect on a male or
" e- z. R9 t* T# N* e5 u* nfemale child who might come in contact with some-% ^: _' @! J$ Q% _8 s! W( q
one using any of these products.4 F* L2 W" w, z n
References. S) O8 Q' H! U' [4 J2 W5 I
1. Styne DM. The testes: disorder of sexual differentiation
9 R! d: ~1 }* P8 d c/ X/ H# Land puberty in the male. In: Sperling MA, ed. Pediatric
; X, I7 `4 R; @/ \; L0 U% fEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;" K. [" n5 z/ W# X1 G' @
2002: 565-628.9 a1 o+ }% ^4 `
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
1 E- R; Q( I M5 T/ F/ m' @- o! n8 k5 lpuberty in children with tumours of the suprasellar pineal
2 N: l* Z3 D* S; c! S3 z5 R3 xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 |6 u$ i7 m3 u) V/ P5 R
Topical Testosterone Exposure / Bhowmick et al 543
2 V; K4 P3 C- V6 jareas: organic central precocious puberty. Acta Paediatr.4 z' s6 q. V& T' i3 B8 |/ q# P
2001;90:751-756." h, ~- ~6 R/ Q3 C# [- X( I9 Z
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
0 Q" A) b- j I1 u: }7 ePediatric Endocrinology. 4th ed. New York, NY: Marcel* [7 @. t- k6 R& J7 E
Dekker Inc; 2003:211-238.
- z. Y2 Z: Q7 [ V4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
3 |+ x9 P+ \3 s: [development in a two-year-old boy induced by topical
% }# e P' `. h$ g5 S0 D4 M5 @exposure to testosterone. Pediatrics. 1999;104:e23.
1 ?/ Q7 y% [0 g. F1 e1 q; w, L) F5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
- O7 I3 C; n& l# OSkeletal Development of the Hand and Wrist. 2nd ed.
. J! d3 c. {. ?5 d, B. bStanford, CA: Stanford University Press; 1959.
1 h B% @5 J d' r6. Physicians’ Desk Reference. Androgel 1% testosterone," Z5 z# t( s6 a3 I2 z
Unimed Pharmaceutical Inc. Montvale, NJ: Medical* C; j, C. b8 L( @6 L
Economics Company, Inc; 2004:3239-3241.9 r- g7 M: S& d+ s1 T+ ]
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