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is a significant concern for physicians. Central
9 }/ J/ x/ A% w e+ T6 Yprecocious puberty (CPP), which is mediated& w5 F6 P7 _% D4 Z
through the hypothalamic pituitary gonadal axis, has
( z! x' ^5 L2 S5 m" q& ?a higher incidence of organic central nervous system
4 m1 [; q/ V$ d' {/ ]1 \lesions in boys.1,2 Virilization in boys, as manifested! f& y. k. C, F
by enlargement of the penis, development of pubic8 X; J2 Q$ e' b8 N5 y
hair, and facial acne without enlargement of testi-
: y$ o) E# x; @( I6 g3 Vcles, suggests peripheral or pseudopuberty.1-3 We
& Y! m- v' A( [& `9 ireport a 16-month-old boy who presented with the' ~0 I6 _6 }7 }& p7 J
enlargement of the phallus and pubic hair develop-$ c+ z% E' U( E, P% C- |8 P
ment without testicular enlargement, which was due
) ^, K) Y1 ? r$ E* J; ^to the unintentional exposure to androgen gel used by- k) H! J2 J, C2 N6 C- d* X
the father. The family initially concealed this infor-4 i7 T) K, ^- _ N! d
mation, resulting in an extensive work-up for this
+ T4 M+ m7 C( H, fchild. Given the widespread and easy availability of: q K( {3 ^* q Z' |! o
testosterone gel and cream, we believe this is proba-
& g2 H3 n. ~; l9 Ably more common than the rare case report in the
' @; u+ G9 n0 B& r Y t: z& x) {literature.41 M3 x9 Z- j9 ~6 c. y3 J
Patient Report! p# K- `( ?- f; j! X1 N
A 16-month-old white child was referred to the
% K. L1 a& F& Q! c7 \# U1 N* Eendocrine clinic by his pediatrician with the concern: c$ K" U9 R# m1 p# l
of early sexual development. His mother noticed
4 ]6 ]* P) T. \' u" O# \ s+ Olight colored pubic hair development when he was
# O8 n( m E5 m. hFrom the 1Division of Pediatric Endocrinology, 2University of: }2 A2 J8 t- W: G. k G
South Alabama Medical Center, Mobile, Alabama.) j4 m: h0 b. ]4 P9 D$ j
Address correspondence to: Samar K. Bhowmick, MD, FACE,
$ @: l& H+ @" x: Y, DProfessor of Pediatrics, University of South Alabama, College of/ O) v0 s% z8 n! M- z- b$ m
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
5 @$ [; Z+ h* M; `, }1 p4 s) z, ce-mail: [email protected].
( ?9 [* L: J& _* Wabout 6 to 7 months old, which progressively became
5 j" M1 m, G% w) [$ l9 _+ c" Cdarker. She was also concerned about the enlarge-
. U0 O2 ~. T8 O( Q+ a/ f4 Fment of his penis and frequent erections. The child2 E4 @" O) }' S/ c
was the product of a full-term normal delivery, with& D1 `5 U* e* Z6 Z7 z9 l
a birth weight of 7 lb 14 oz, and birth length of
; O% c0 q/ v& @" V5 i0 k# N0 e20 inches. He was breast-fed throughout the first year
4 P6 C8 ?( |1 R- A4 Sof life and was still receiving breast milk along with
, `" C) Q7 R7 [ J8 q6 {solid food. He had no hospitalizations or surgery,
1 |' X; ~; m) A, A, H) Q1 \and his psychosocial and psychomotor development& ?& L# J- [4 k" a( I8 \$ U6 q
was age appropriate.# \$ o4 b+ G( j5 O/ M n
The family history was remarkable for the father,4 i# U# \% D% T. m/ R/ X$ W
who was diagnosed with hypothyroidism at age 16,3 V7 V/ k) Q0 `* @4 x! X/ @4 X
which was treated with thyroxine. The father’s! d$ ~7 P( F; b. e V, r3 ~3 R
height was 6 feet, and he went through a somewhat0 y" n, [5 E! P
early puberty and had stopped growing by age 14.
7 X7 }, p, D+ `8 U: [) S+ O2 {# j6 gThe father denied taking any other medication. The
1 S& ?1 E) B9 c3 u- m8 uchild’s mother was in good health. Her menarche
4 a' a& V( z+ w; E% N+ Nwas at 11 years of age, and her height was at 5 feet) C3 J, Y$ N3 p: _) Q5 e* @- f
5 inches. There was no other family history of pre-
9 c. J0 H& K- E' a* |1 H9 pcocious sexual development in the first-degree rela-/ o: h$ k7 y, i8 e
tives. There were no siblings.
. c: ?0 ?- q# r3 W$ r: KPhysical Examination4 F4 i: a) _1 ~' R/ A0 ^
The physical examination revealed a very active,
- R) s' M8 [* d9 x9 n; {" fplayful, and healthy boy. The vital signs documented
7 d7 ]' L7 ?1 ma blood pressure of 85/50 mm Hg, his length was
3 Z8 E5 u9 g# \9 \ Z! {- Y& g" b90 cm (>97th percentile), and his weight was 14.4 kg7 B" y) W6 t6 q
(also >97th percentile). The observed yearly growth( I) |6 V+ j2 x$ V0 ^. s' g/ v% [
velocity was 30 cm (12 inches). The examination of; j; b* T" o8 z. R7 }3 v
the neck revealed no thyroid enlargement.
8 g, J* w* W: M6 ?The genitourinary examination was remarkable for
/ F9 P% X; |* z0 a. F# n7 e1 j: m7 penlargement of the penis, with a stretched length of
1 u ]6 q. p7 e& w& p8 cm and a width of 2 cm. The glans penis was very well% z* ?; `5 y, c; k. ?* e
developed. The pubic hair was Tanner II, mostly around
9 w( b9 ~5 N8 }, o: c540
- K/ D" `* R) D. R$ eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" s1 L8 \' V& r- }! D' Tthe base of the phallus and was dark and curled. The
, c( o% A. P0 R5 A" }4 Htesticular volume was prepubertal at 2 mL each.
7 a- N; G; \! A" \" X" D+ q8 G- A nThe skin was moist and smooth and somewhat
, Y' j1 o' O" F" J% }4 v. y5 xoily. No axillary hair was noted. There were no3 } I1 U( v {$ M8 u# g/ v
abnormal skin pigmentations or café-au-lait spots.
9 f }) K5 g f6 x) m( s9 J* \$ \Neurologic evaluation showed deep tendon reflex 2+' F- E2 j' z7 j& m: u5 X1 p9 v
bilateral and symmetrical. There was no suggestion
; _3 h4 V3 ~& m1 d& rof papilledema.7 j7 [- e& ]8 I
Laboratory Evaluation
9 u# j8 d1 M% y, l& n" q# [The bone age was consistent with 28 months by1 C0 X- A6 @- X' I
using the standard of Greulich and Pyle at a chrono-
: v6 b5 O+ p o( W. ^" l" xlogic age of 16 months (advanced).5 Chromosomal" R) y2 q8 y$ d0 U2 { S0 i
karyotype was 46XY. The thyroid function test
! c9 B; _$ S3 y n! H" Tshowed a free T4 of 1.69 ng/dL, and thyroid stimu-5 N1 U! B9 c& p+ x& h: C! Q5 O
lating hormone level was 1.3 µIU/mL (both normal).
, S$ i0 A0 O% P# i8 w% nThe concentrations of serum electrolytes, blood
5 b4 P) |* P5 `0 V* w* v" Ourea nitrogen, creatinine, and calcium all were
) |) L# `% j J4 cwithin normal range for his age. The concentration
x$ c. K# E% qof serum 17-hydroxyprogesterone was 16 ng/dL
8 ^0 g( c6 n- s1 j0 r& A$ G. y(normal, 3 to 90 ng/dL), androstenedione was 205 p* I3 P& }6 E
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
, O# p& m6 T$ h. kterone was 38 ng/dL (normal, 50 to 760 ng/dL),
" e$ z7 e8 a6 H9 M" n+ T9 S, C7 e! Ldesoxycorticosterone was 4.3 ng/dL (normal, 7 to/ ^( Q, g8 R Q7 _
49ng/dL), 11-desoxycortisol (specific compound S); ~6 P& I+ f _ M3 j
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
5 S' H" a' r( vtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total9 Y. V+ Q5 |/ ]
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
' C" T) [2 M4 O" uand β-human chorionic gonadotropin was less than: }1 p& g; Q: c! M; K$ |2 T; X
5 mIU/mL (normal <5 mIU/mL). Serum follicular- n& a( x" L6 z. i( |) P" F7 A
stimulating hormone and leuteinizing hormone* Q2 l: Q4 T" s$ R; b
concentrations were less than 0.05 mIU/mL
7 y% G2 y% c; a7 |/ ](prepubertal).
8 e) E4 [/ D3 W0 J. mThe parents were notified about the laboratory
# c" [7 \& p$ \& f: Eresults and were informed that all of the tests were7 x" F% x$ u2 [ l# R0 G" ]
normal except the testosterone level was high. The
+ R. \& ]! e; b _" Jfollow-up visit was arranged within a few weeks to* R& m6 k( s8 A5 D
obtain testicular and abdominal sonograms; how-
/ e: W2 O( G" [. vever, the family did not return for 4 months.7 n/ e3 f; x5 A* R* h* J- j. X
Physical examination at this time revealed that the
D5 p. F7 w. w# I) r4 t! ?child had grown 2.5 cm in 4 months and had gained
% S" F5 ^; y! D# L& x" i1 d) Z2 kg of weight. Physical examination remained
5 G' d8 v+ B, z5 X% ~& [unchanged. Surprisingly, the pubic hair almost com-8 t5 }* O! E8 @* a
pletely disappeared except for a few vellous hairs at- v& I' y K; s1 P
the base of the phallus. Testicular volume was still 27 d; A, x& G, E
mL, and the size of the penis remained unchanged.
/ E6 M( y3 F, ^6 v; qThe mother also said that the boy was no longer hav-2 ?/ F3 ?+ q+ h N2 I+ w$ o
ing frequent erections.
. k& U G$ [+ f- j6 n' M6 `Both parents were again questioned about use of$ [" i# k9 Q/ u+ ^3 {7 m
any ointment/creams that they may have applied to4 L: g ?/ `9 k! u4 j; b
the child’s skin. This time the father admitted the; G* n- H% w* R" c4 [8 V4 k
Topical Testosterone Exposure / Bhowmick et al 541
& O) Y/ c1 n6 [. quse of testosterone gel twice daily that he was apply-* I& {0 T/ F6 P( E$ P% R2 F
ing over his own shoulders, chest, and back area for
, v: c7 Q8 K- p6 b5 L6 `' D/ Za year. The father also revealed he was embarrassed
: \) o1 F' s* e* b( oto disclose that he was using a testosterone gel pre-
1 o! i8 ^! v+ R2 q+ Lscribed by his family physician for decreased libido5 y+ `" N/ B; Z) I: J, }) d# @* Z3 o
secondary to depression.# }- d' U$ C D9 B: j
The child slept in the same bed with parents.8 ~: c' C. h0 ?; w/ v- i
The father would hug the baby and hold him on his/ N0 g# |6 j7 {6 {5 T5 v
chest for a considerable period of time, causing sig-* a4 C* g; {; K+ s3 k) I. ~
nificant bare skin contact between baby and father.
& S" I- ?1 Z0 e4 e9 q- JThe father also admitted that after the phone call,
& }1 y6 y% O2 O% O6 _when he learned the testosterone level in the baby
2 t) i8 o C2 L# P" {/ Q2 iwas high, he then read the product information
& V1 ` D& x0 j$ C9 R+ X! Opacket and concluded that it was most likely the rea-; i, G# E7 O. g0 [+ l* ~
son for the child’s virilization. At that time, they
' a( e1 t$ ^' g6 _5 P- sdecided to put the baby in a separate bed, and the
% O- [* w: w* w3 Lfather was not hugging him with bare skin and had
h: y. @+ w% E7 i. g# ?been using protective clothing. A repeat testosterone3 D; W. W- K1 s) n& f& h5 r- T8 f5 N, {
test was ordered, but the family did not go to the$ C0 D- {5 l1 K
laboratory to obtain the test.
' I4 V1 o2 i% g" kDiscussion" Z) [7 ]& h! w6 V" {: [
Precocious puberty in boys is defined as secondary
% y: }0 F$ v+ N. L3 V4 Zsexual development before 9 years of age.1,4: ], a$ y' u% a2 F
Precocious puberty is termed as central (true) when
0 W" l2 u1 y0 ~2 S/ u3 _it is caused by the premature activation of hypo-
% e. `0 i% g5 ^! rthalamic pituitary gonadal axis. CPP is more com-# j2 M0 G% [+ n A
mon in girls than in boys.1,3 Most boys with CPP' ] v; m. N z9 b
may have a central nervous system lesion that is) | P: H+ | ]$ ^; A+ R
responsible for the early activation of the hypothal-
9 f1 k% V1 n5 d+ _amic pituitary gonadal axis.1-3 Thus, greater empha-
! d ?' V% i6 \) ?sis has been given to neuroradiologic imaging in2 N. b, E9 |% U O" Z0 ~+ E9 `/ E
boys with precocious puberty. In addition to viril-
( K" c1 S) B# ?) r& D, yization, the clinical hallmark of CPP is the symmet-
3 P& p: O6 X* Trical testicular growth secondary to stimulation by; m3 e7 t% ~! }5 {
gonadotropins.1,38 y+ F+ m/ _: l7 n& Q
Gonadotropin-independent peripheral preco-
1 C% S X: b1 t+ J6 p' o' rcious puberty in boys also results from inappropriate2 @0 `. M% a g# F
androgenic stimulation from either endogenous or4 F; l/ z. ^0 p* W1 ]: R
exogenous sources, nonpituitary gonadotropin stim-
& f3 m0 Z5 H3 J6 G' s2 l2 v% xulation, and rare activating mutations.3 Virilizing
6 x/ C. l: U4 @0 S; o: kcongenital adrenal hyperplasia producing excessive( U4 k+ k5 b; u$ }( c; b
adrenal androgens is a common cause of precocious$ B6 S3 b; V, K( Q+ ~
puberty in boys.3,4
9 [. [1 Y3 k3 S9 v8 o5 g" RThe most common form of congenital adrenal+ E9 q, V2 r; k) x6 L) `1 u- G, ^& f/ e
hyperplasia is the 21-hydroxylase enzyme deficiency.
& r: u4 z" b3 i! o) EThe 11-β hydroxylase deficiency may also result in, p1 I, q: T' h$ k) N5 N8 w$ a; B* _
excessive adrenal androgen production, and rarely,% K; o. R( A+ e! R i% v5 |. F
an adrenal tumor may also cause adrenal androgen
" Q4 b* _, r! C8 hexcess.1,3: S" L9 |: V& @3 A. V
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) O7 _8 e- h$ z6 k
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007+ H! x! w6 `" B5 K- h
A unique entity of male-limited gonadotropin-
- H+ i2 w, b/ _' U9 |independent precocious puberty, which is also known W+ P3 |/ q! `3 ?
as testotoxicosis, may cause precocious puberty at a& l6 t* R4 l* A2 z
very young age. The physical findings in these boys5 p& n4 S) _' d1 Q& `
with this disorder are full pubertal development,
/ Q! j ^1 O; X4 jincluding bilateral testicular growth, similar to boys
+ x! C( D. d2 x! D. c: w2 e I: Pwith CPP. The gonadotropin levels in this disorder
4 R; V$ B3 `- b8 n* K# Tare suppressed to prepubertal levels and do not show8 Y: b9 ~% \ e2 z, n0 Y6 Y
pubertal response of gonadotropin after gonadotropin-
: \& R: V3 B* C) L- F. Rreleasing hormone stimulation. This is a sex-linked. Z: x. B) c$ S* q+ ^9 R [
autosomal dominant disorder that affects only/ l8 [# r+ ?, x
males; therefore, other male members of the family
! Y% j6 s a$ ?+ imay have similar precocious puberty.3
+ M" V8 g0 Z9 a& k0 @( UIn our patient, physical examination was incon-
8 T3 W/ C9 ^% L) M/ q0 Z! Hsistent with true precocious puberty since his testi-( I; ~" X9 {/ O& _
cles were prepubertal in size. However, testotoxicosis8 m$ N% x' r; o
was in the differential diagnosis because his father
1 k" _: J+ I9 S- g4 Q+ Q$ k: Lstarted puberty somewhat early, and occasionally,
% a7 T4 G3 W: J% {' qtesticular enlargement is not that evident in the1 X& S3 O) m' `* }
beginning of this process.1 In the absence of a neg-+ q; r [5 X9 N% q. m. S I
ative initial history of androgen exposure, our! j F* s& O( [ ?% u
biggest concern was virilizing adrenal hyperplasia,1 \5 A- n1 ^, v3 ^ w
either 21-hydroxylase deficiency or 11-β hydroxylase% ~& {& U$ a- [3 u4 w# X3 o3 v/ `
deficiency. Those diagnoses were excluded by find-
2 W" } o4 v8 E: {7 v$ d" w$ ring the normal level of adrenal steroids.& h. P% }& x$ f1 q F9 ~
The diagnosis of exogenous androgens was strongly" w; f8 B: P! v0 @4 C. u, [0 v! m
suspected in a follow-up visit after 4 months because! o. Z( w7 F3 Z
the physical examination revealed the complete disap-8 B( z8 D# ?: ~- J
pearance of pubic hair, normal growth velocity, and
8 a% K* u" B( A" ]* _ h( J1 t" Hdecreased erections. The father admitted using a testos-$ Q! s6 l# i$ f* {; s4 ~
terone gel, which he concealed at first visit. He was& A/ @9 \1 k3 R' s# C5 x
using it rather frequently, twice a day. The Physicians’' o+ a( U. ^! S/ `! |1 }
Desk Reference, or package insert of this product, gel or+ S W( b7 K9 x5 G
cream, cautions about dermal testosterone transfer to
) Z0 W+ j' }/ p: U( c# P" Z7 @( uunprotected females through direct skin exposure.
( P; L* g; A$ p4 P4 |+ m! YSerum testosterone level was found to be 2 times the
1 h+ D6 Q) c/ Y o8 P( ibaseline value in those females who were exposed to- T9 {: ~8 T0 G4 q0 E8 K* O
even 15 minutes of direct skin contact with their male" M* a) ~( _) G; R! U
partners.6 However, when a shirt covered the applica-
" j2 }7 U7 L6 y# W( l# u$ Etion site, this testosterone transfer was prevented.9 w# T& L5 D! n, Z z4 X
Our patient’s testosterone level was 60 ng/mL,# A) {7 `7 k, z" b d
which was clearly high. Some studies suggest that
3 U) k! O6 g$ I; C/ X" ~dermal conversion of testosterone to dihydrotestos-
& }4 R6 `5 y3 j. D! Dterone, which is a more potent metabolite, is more# `1 n3 K4 v# u! v! E3 Q
active in young children exposed to testosterone
# n4 X- |, ~9 \: r3 [: Fexogenously7; however, we did not measure a dihy-
- C& d6 `: C9 f/ Jdrotestosterone level in our patient. In addition to0 w) h$ o/ f# s
virilization, exposure to exogenous testosterone in' S3 Z {% v/ f& x! Q4 G
children results in an increase in growth velocity and
+ b0 F6 n" N) [- X: _. I0 uadvanced bone age, as seen in our patient.% ^# r7 r2 D; q
The long-term effect of androgen exposure during
5 K* G- @: f5 K, n7 i8 E5 U) zearly childhood on pubertal development and final( I$ D! }6 ^4 T9 r' c: I' ]
adult height are not fully known and always remain9 |; ` g8 u7 R; P
a concern. Children treated with short-term testos-0 w: l" G+ @0 z7 O! e( K3 \
terone injection or topical androgen may exhibit some5 l( ]3 m+ x" M, k9 W; D
acceleration of the skeletal maturation; however, after, ]4 @* W' H8 {4 ?( y3 D ]% b
cessation of treatment, the rate of bone maturation; z1 [" `- w' | B0 z
decelerates and gradually returns to normal.8,9
! H% S4 u# O- Y7 i9 Z5 DThere are conflicting reports and controversy
) i3 c4 \6 W! Y$ z( b7 e3 L* V/ @over the effect of early androgen exposure on adult
# |2 o! Z$ k6 d$ l8 rpenile length.10,11 Some reports suggest subnormal
0 b. t4 p# z8 Radult penile length, apparently because of downreg-
$ _2 Z, O% Z- [, dulation of androgen receptor number.10,12 However,; Z. a: G9 x& x) [7 M3 i
Sutherland et al13 did not find a correlation between
: b' R8 L+ b( X. \2 Rchildhood testosterone exposure and reduced adult" R5 m2 m0 w+ x! q0 {+ d- j
penile length in clinical studies.
3 ]5 Z% z: a9 j6 S# W; }) L: kNonetheless, we do not believe our patient is
5 o$ H+ G3 r" j5 ygoing to experience any of the untoward effects from8 P7 j, U. p; ?. p1 V9 M6 x6 ]
testosterone exposure as mentioned earlier because) G5 r U( A+ r4 _: ^; A6 O9 s( [
the exposure was not for a prolonged period of time.
7 S- K0 O( {7 h; R) cAlthough the bone age was advanced at the time of: ^" K9 Z4 ~ r- |/ g! d7 c/ ]
diagnosis, the child had a normal growth velocity at3 g8 }: |; l `
the follow-up visit. It is hoped that his final adult
- q- g1 l. P q8 \! g/ z' Fheight will not be affected.1 H: x- ]' X8 @ h! _/ M
Although rarely reported, the widespread avail-
# R0 D8 @& ` }2 u& I7 L1 V* }ability of androgen products in our society may
9 w; J4 K0 M( w1 P$ E9 v, p+ gindeed cause more virilization in male or female
; z4 E0 h" N, G$ y3 O J9 Dchildren than one would realize. Exposure to andro- n: [: `- l3 C0 W% |" s, O
gen products must be considered and specific ques-
. e9 N1 K; w# Ytioning about the use of a testosterone product or
5 z" s" D( m9 ~2 H! {7 _# Y! O) S$ h3 vgel should be asked of the family members during
% k# v, q4 W$ t9 l- Lthe evaluation of any children who present with vir-9 u+ U1 f+ d @. Y7 Z6 v& t3 {4 x
ilization or peripheral precocious puberty. The diag-4 z% Q/ l! x; z) H
nosis can be established by just a few tests and by
1 v' ?- Y2 h% D* gappropriate history. The inability to obtain such a0 {* t1 @% G y( N
history, or failure to ask the specific questions, may# [" ?' d5 J& k5 r' ~0 x
result in extensive, unnecessary, and expensive
5 T! y$ K1 C, U% [+ C, Vinvestigation. The primary care physician should be
o& {6 Z' a- @" baware of this fact, because most of these children# I( y( h* I( w* [- o
may initially present in their practice. The Physicians’" w) i! E' f% e+ w
Desk Reference and package insert should also put a6 w8 U; i/ V' t# Z" n9 A
warning about the virilizing effect on a male or
6 C1 V& ~# |/ E, b# nfemale child who might come in contact with some-, ? S+ w4 \8 |" K8 @
one using any of these products.
: t4 W+ }: l5 E1 vReferences' R6 n* r) z) j3 e1 I; I2 w- i/ J
1. Styne DM. The testes: disorder of sexual differentiation
# f/ W; z4 N4 R, hand puberty in the male. In: Sperling MA, ed. Pediatric
" r: b9 t8 h; S0 J( fEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
1 f4 v+ R1 h3 _3 L' E/ y+ D& F( j2002: 565-628.' t- P2 m. j5 b, j; K
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
) X3 A2 @$ r+ P0 t/ u% Z: opuberty in children with tumours of the suprasellar pineal
+ I* I* T3 L, T5 iat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* s1 O6 w1 N4 q. B' y4 |! \. ?Topical Testosterone Exposure / Bhowmick et al 543# e6 Y/ M2 [, z7 g4 ?
areas: organic central precocious puberty. Acta Paediatr.
" R) y- Q! h$ W2 ~' r" R9 G0 v2001;90:751-756.' i; p) T7 Y. S
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.4 p9 g. Z' s4 _2 L- a: g- ]- ]" T8 b
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
! B0 I5 R* j; g' e' f! u( I" `Dekker Inc; 2003:211-238.0 X) c2 g+ F8 P. Q1 w
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
. D2 z& e# ]- s8 I+ W: j8 hdevelopment in a two-year-old boy induced by topical
& [# p/ O% h- e) a. |. p: Nexposure to testosterone. Pediatrics. 1999;104:e23.7 O# }: g4 S/ ^( ^ }: z+ L6 v
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of' k- E- F* @' p, p/ H
Skeletal Development of the Hand and Wrist. 2nd ed.! j( ^. o* l8 w6 w- m- m
Stanford, CA: Stanford University Press; 1959.( q% \9 a8 t1 ~. H E3 e g0 {
6. Physicians’ Desk Reference. Androgel 1% testosterone,
. a3 _$ s: D0 ^' JUnimed Pharmaceutical Inc. Montvale, NJ: Medical
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