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is a significant concern for physicians. Central
/ F1 ^/ \$ I: b7 Z; i i: S- nprecocious puberty (CPP), which is mediated
& z- ?% r8 B7 }through the hypothalamic pituitary gonadal axis, has. D7 J; s3 O* ]
a higher incidence of organic central nervous system: g8 }% o# |# o H9 l
lesions in boys.1,2 Virilization in boys, as manifested+ M5 e- I r6 v6 D
by enlargement of the penis, development of pubic
& I( W2 ]7 R. o3 V5 Uhair, and facial acne without enlargement of testi-; Q" o4 L O* i- e1 z* a2 B) u- h3 ]
cles, suggests peripheral or pseudopuberty.1-3 We
( I7 {# \* ~# f" L1 Zreport a 16-month-old boy who presented with the0 O+ y; }, k8 G7 w5 d9 w
enlargement of the phallus and pubic hair develop-
$ n7 [, g* N$ t+ \, t7 Nment without testicular enlargement, which was due
3 c% U/ m. e: f( ]) r5 mto the unintentional exposure to androgen gel used by
) {2 B Q/ o' D! M8 p( v3 Tthe father. The family initially concealed this infor-: r% J* z/ h8 \8 Q+ N
mation, resulting in an extensive work-up for this
# N: q3 J1 P- Vchild. Given the widespread and easy availability of5 d/ ]/ [+ M }1 j( j, t& H
testosterone gel and cream, we believe this is proba-
+ A% K7 B% Q1 N+ ~, }; wbly more common than the rare case report in the
q5 b0 ?1 }5 x# Qliterature.4
) @6 E1 g7 N/ {( ?Patient Report
, E7 U- A" {# G5 [- H! EA 16-month-old white child was referred to the; m. p8 b0 m8 a& B$ L
endocrine clinic by his pediatrician with the concern" v7 f$ r: ^' ~ a5 m* o
of early sexual development. His mother noticed
/ E8 P7 B8 k. i( Q: }: alight colored pubic hair development when he was
5 e- r+ z$ R; |8 S N) x; y# v' UFrom the 1Division of Pediatric Endocrinology, 2University of
1 q9 q9 Q$ J9 Z) ^/ v* W7 V- z5 G6 w; pSouth Alabama Medical Center, Mobile, Alabama.
& Q5 u- |! o2 aAddress correspondence to: Samar K. Bhowmick, MD, FACE,
8 @' z+ J0 }: _Professor of Pediatrics, University of South Alabama, College of" l# o V2 E5 ]
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;' e7 Z9 D; e+ `" ~" d: {0 s
e-mail: [email protected].
4 x6 Y+ [2 ^1 z0 H- `( rabout 6 to 7 months old, which progressively became
3 Z$ W0 c( k. n2 Q( hdarker. She was also concerned about the enlarge-
3 v+ X; J% l, Z% R8 E' y$ {( z4 mment of his penis and frequent erections. The child L6 O: {, j5 t) e$ i5 ]$ z- v
was the product of a full-term normal delivery, with
! T0 {- a9 R* za birth weight of 7 lb 14 oz, and birth length of$ j# I {+ }+ ]3 J% O# e
20 inches. He was breast-fed throughout the first year
& e1 J6 N5 n& _" \. ]of life and was still receiving breast milk along with8 v: u$ ^. U% D- I& y
solid food. He had no hospitalizations or surgery,
6 Y7 }5 j1 C7 Dand his psychosocial and psychomotor development7 O% M, t2 D: t6 A
was age appropriate.9 Z9 h. U& _0 O. U# o/ C! e
The family history was remarkable for the father,
9 v5 |) B+ p4 K) Twho was diagnosed with hypothyroidism at age 16,) u3 J5 R2 ?- r$ |5 e* `1 _
which was treated with thyroxine. The father’s. b4 Y. G. U7 U& Z
height was 6 feet, and he went through a somewhat6 j" q* s( q$ r) `! q4 \
early puberty and had stopped growing by age 14.- T# Q; O2 _! B- q
The father denied taking any other medication. The
& U ]. I) y1 lchild’s mother was in good health. Her menarche
q, Q. g2 [/ G, ywas at 11 years of age, and her height was at 5 feet
' v- l/ `; ]! j' y( {" o' ?9 d4 i5 inches. There was no other family history of pre-
0 s2 s: {! I. ~cocious sexual development in the first-degree rela-2 D6 I1 Y. B# g( l
tives. There were no siblings.
K4 R" J- M" J; q$ `9 b4 a: x7 E/ PPhysical Examination
/ Z* \( u( G; E. H5 j* O* _The physical examination revealed a very active,
7 u8 S( L; k( C: k5 kplayful, and healthy boy. The vital signs documented# C( W; J3 i A" E, F/ E
a blood pressure of 85/50 mm Hg, his length was
. K F8 Z; X4 d" V/ S( V9 ^# F90 cm (>97th percentile), and his weight was 14.4 kg* I# g* _1 E' H! a
(also >97th percentile). The observed yearly growth
. o* b1 X, g" h+ ]6 Mvelocity was 30 cm (12 inches). The examination of r* h! h$ T' m$ n) |3 o
the neck revealed no thyroid enlargement.0 `) |* S% i6 i. Y
The genitourinary examination was remarkable for; f% {6 t* g& \8 G; I+ H. i/ [
enlargement of the penis, with a stretched length of
: b. {# \& i1 n" c' o; y* h8 cm and a width of 2 cm. The glans penis was very well: @' G3 U3 `" A1 @1 s
developed. The pubic hair was Tanner II, mostly around
- `- W6 a8 [- u; I' a! D: e540- g( y- k4 C3 D6 @ h6 r
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ ]( w4 k& D" u
the base of the phallus and was dark and curled. The
/ z4 Q) r3 G8 \5 y6 ^- k! r) K' K, {" Ttesticular volume was prepubertal at 2 mL each.$ w: q% z6 t- q2 |
The skin was moist and smooth and somewhat* e: _0 f* r- ^$ P' `; T
oily. No axillary hair was noted. There were no
; q. j1 q; j8 w( N! @abnormal skin pigmentations or café-au-lait spots.
& ]4 s$ ~6 R, r- \3 q dNeurologic evaluation showed deep tendon reflex 2+7 d0 a9 N+ u" g' [' K
bilateral and symmetrical. There was no suggestion
& B7 W2 U, c R0 h! e. t' I9 aof papilledema.
5 u5 b4 L/ I4 Z/ Z$ @6 x b- }0 ~# BLaboratory Evaluation
8 B) U3 V5 G! K& f9 RThe bone age was consistent with 28 months by
; b2 C! E7 i- K2 x3 g5 C' p% |! Kusing the standard of Greulich and Pyle at a chrono-" `9 Y! L3 G8 O4 S$ f: A
logic age of 16 months (advanced).5 Chromosomal# g$ R F: G, T
karyotype was 46XY. The thyroid function test
1 j' b. }. q9 w3 l) b1 jshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
( |& T X" A, o; k/ a& t& s; Glating hormone level was 1.3 µIU/mL (both normal).
4 w$ t4 d; y! P; T9 g2 ~0 hThe concentrations of serum electrolytes, blood
) x4 I) N; N+ u$ Ourea nitrogen, creatinine, and calcium all were. t* D* _7 [+ {- b1 }, A
within normal range for his age. The concentration! S- c4 F! N" _4 S& L
of serum 17-hydroxyprogesterone was 16 ng/dL" O. C. e: q9 J7 s/ X
(normal, 3 to 90 ng/dL), androstenedione was 20% p9 A, s" L/ I& r6 u; v+ o
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
% A' j$ n/ x# e0 y, Y ^terone was 38 ng/dL (normal, 50 to 760 ng/dL),
; }) e9 z+ b! ? fdesoxycorticosterone was 4.3 ng/dL (normal, 7 to* x$ }! k# f* x& f/ P
49ng/dL), 11-desoxycortisol (specific compound S)7 B8 H8 J' d6 K$ L0 H4 J! R" Y
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-' T& ^, R: i6 v
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total( X( O& a, ^5 N0 W( H# U
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),* G. p% I4 y/ Z
and β-human chorionic gonadotropin was less than+ y5 g8 @* f# E9 Q8 ~
5 mIU/mL (normal <5 mIU/mL). Serum follicular w9 a( V6 }( S4 h( [) J0 G
stimulating hormone and leuteinizing hormone0 t. g- k! \0 p7 _
concentrations were less than 0.05 mIU/mL
Y$ K; `3 O0 w9 ?& t(prepubertal).
# l# ?6 K8 R+ Y4 c- sThe parents were notified about the laboratory
4 N, p. F! G; R7 K `results and were informed that all of the tests were
3 Z7 J# H _# @" J6 \3 F* A% x: u- Gnormal except the testosterone level was high. The" `9 j, E* p4 ]4 K( {: A, P+ |
follow-up visit was arranged within a few weeks to8 X/ t* ^2 r3 M# j0 S3 G+ J1 i
obtain testicular and abdominal sonograms; how-
# U6 T; H" C+ o6 Jever, the family did not return for 4 months.
% O. y* `: o& V: e# ~( a: n+ _Physical examination at this time revealed that the: D9 s" B0 T, r( V, P
child had grown 2.5 cm in 4 months and had gained3 j0 v* B' q9 t6 _
2 kg of weight. Physical examination remained' }# _2 J! s% g' H: c
unchanged. Surprisingly, the pubic hair almost com-. S) J; f9 `+ H; |$ z I7 y/ W
pletely disappeared except for a few vellous hairs at: Z( E# v: _2 b) M" d+ E. S7 o5 l
the base of the phallus. Testicular volume was still 2
8 ]& R4 q: X0 }: A& RmL, and the size of the penis remained unchanged.8 N/ p& \9 o9 J3 I8 z* t) e# S& V
The mother also said that the boy was no longer hav-, c L" _( d# d8 d6 ]: `5 c% x; i9 L
ing frequent erections.
0 _2 m- l6 W0 Z, HBoth parents were again questioned about use of
: l Q! ^) \4 q# x N: Many ointment/creams that they may have applied to
7 f$ l/ I: L. D' \! A5 e( F. Ythe child’s skin. This time the father admitted the
5 w& Q; `& L2 l) J7 f) V& `Topical Testosterone Exposure / Bhowmick et al 541) D; V$ x& @$ v A
use of testosterone gel twice daily that he was apply-; @+ ?! \4 P1 G; ~+ i7 l. j
ing over his own shoulders, chest, and back area for2 u* e {% v6 w- F% Y
a year. The father also revealed he was embarrassed
/ ?% A$ [* w. R2 @" s7 K: ^+ T9 m# R' Tto disclose that he was using a testosterone gel pre-
$ \4 d; O% q( M: i6 pscribed by his family physician for decreased libido
0 U! P- I) e6 E. `4 ^2 E" Ysecondary to depression.
: x$ j* y. ^1 ^1 q9 s& P% H8 pThe child slept in the same bed with parents.
/ ^/ e& g* Y% l/ y3 w2 H5 sThe father would hug the baby and hold him on his T% E3 [/ i: o: s7 m
chest for a considerable period of time, causing sig-
" p# a& Z6 N" nnificant bare skin contact between baby and father.
4 q! z! W! E k( ~! j9 l8 nThe father also admitted that after the phone call,7 R3 v! l% I$ c( ~
when he learned the testosterone level in the baby* A, W" n7 V- \9 g; [+ ?3 p" t
was high, he then read the product information
R( N$ l% y3 T( z! C1 |9 {& Apacket and concluded that it was most likely the rea-
0 h4 ^2 A' B5 _3 @son for the child’s virilization. At that time, they
$ e& h' Z% c1 ?6 l8 m; Y6 q' o tdecided to put the baby in a separate bed, and the0 L" q4 j @, o G1 L: P6 d5 [
father was not hugging him with bare skin and had
' m5 |' f: X! z9 U. K& [% y) Sbeen using protective clothing. A repeat testosterone
- C8 w$ Q# B7 z" R/ ytest was ordered, but the family did not go to the! m5 L9 B0 v/ b w( {6 s- q9 n
laboratory to obtain the test., p4 k' [7 e7 p7 v) `0 f; S
Discussion
% |8 B0 `$ s9 |# t7 UPrecocious puberty in boys is defined as secondary
. U% C* }' W nsexual development before 9 years of age.1,42 v& O! ]: o) Y" p6 ?8 D- q! ~- t# j
Precocious puberty is termed as central (true) when4 e& q" Z; Y/ i9 S8 N6 Q- U( I
it is caused by the premature activation of hypo-
' a& e2 f$ x, ~) pthalamic pituitary gonadal axis. CPP is more com-# v/ r8 i1 d! v+ j3 |* f
mon in girls than in boys.1,3 Most boys with CPP% q. |1 K. ^$ V
may have a central nervous system lesion that is
1 ~) t* A. S& f, B& T: d5 Y2 A! Oresponsible for the early activation of the hypothal-
) E6 U2 V; \: H* Uamic pituitary gonadal axis.1-3 Thus, greater empha-
5 l5 \4 s7 T; ^3 [' s+ l* ]$ Y D7 vsis has been given to neuroradiologic imaging in& t; Z1 B# \( w% ?+ z" S4 ?# I( b
boys with precocious puberty. In addition to viril-; A1 _1 x G) _7 l
ization, the clinical hallmark of CPP is the symmet-
0 X1 w: p1 x$ T/ Vrical testicular growth secondary to stimulation by9 c. s. |4 x0 A" W" i+ [7 ?
gonadotropins.1,3
, u* `- H7 [2 N3 W1 y+ v( ~6 i6 i' sGonadotropin-independent peripheral preco-
$ ]5 X* |- z$ e% `! Scious puberty in boys also results from inappropriate
% I% Z- f" U7 [& T, w/ K. g/ _androgenic stimulation from either endogenous or
5 I3 B3 k, x; l/ Eexogenous sources, nonpituitary gonadotropin stim-. S" [( R7 k9 _6 X
ulation, and rare activating mutations.3 Virilizing% R2 j" R9 Z3 p9 H3 w+ O$ M( r2 P$ E
congenital adrenal hyperplasia producing excessive
+ s$ C* |( Q/ j; L7 V+ i* [/ nadrenal androgens is a common cause of precocious' q$ {9 ]2 x" U8 F5 n3 i: K5 f
puberty in boys.3,49 g4 B2 a- r9 q8 f! P0 V
The most common form of congenital adrenal
) ?* X/ \6 f" s& Uhyperplasia is the 21-hydroxylase enzyme deficiency.- T+ e0 C) F( D$ o l; o
The 11-β hydroxylase deficiency may also result in
9 b0 o" J% S$ w, z: nexcessive adrenal androgen production, and rarely,
+ q5 g( }- f' k3 C1 o3 C7 ~an adrenal tumor may also cause adrenal androgen
$ k! P+ ^ D' c0 Qexcess.1,3
! `; @8 O" n# g" p, p. ~at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from+ d$ f& ~9 e$ X
542 Clinical Pediatrics / Vol. 46, No. 6, July 20075 z9 p* U6 J: Z1 v. c% N: [1 Y
A unique entity of male-limited gonadotropin-
: q+ I. p7 l3 g! }9 h' Q$ f2 ^independent precocious puberty, which is also known
' z) T3 q! o, ~1 g, k! ]as testotoxicosis, may cause precocious puberty at a
0 D. T: @- k% w. \! i7 O2 tvery young age. The physical findings in these boys
- \* t1 I0 r: v) a' y$ s/ `$ Nwith this disorder are full pubertal development,1 t; K% U6 a7 F
including bilateral testicular growth, similar to boys
$ u3 w: ^1 ]9 Q; A" twith CPP. The gonadotropin levels in this disorder7 U n6 ^: |6 X1 C: [
are suppressed to prepubertal levels and do not show" d- B2 i7 d! q) d+ C
pubertal response of gonadotropin after gonadotropin-1 s* ]; b5 U. i) d ]
releasing hormone stimulation. This is a sex-linked- @ `/ o9 K6 ?0 \6 M# X. U
autosomal dominant disorder that affects only
# D( C' L S1 X8 Gmales; therefore, other male members of the family
7 O9 F9 q$ V! n/ V8 kmay have similar precocious puberty.3% w4 H: \4 J$ v1 r S7 A
In our patient, physical examination was incon-
! q: {% |, z! F, ^& g% Esistent with true precocious puberty since his testi-
6 N( |. K3 w' U* J3 Gcles were prepubertal in size. However, testotoxicosis/ S; c g7 V. e# u% F
was in the differential diagnosis because his father. F& v- h0 J/ P5 M
started puberty somewhat early, and occasionally,7 o- r+ `. B2 O0 A8 Y
testicular enlargement is not that evident in the' H/ U: g7 T1 `2 U3 `% H& c
beginning of this process.1 In the absence of a neg-
& Z+ O" w. _' R# J8 Bative initial history of androgen exposure, our; f) a4 r. {" ~% e* @( E7 ?
biggest concern was virilizing adrenal hyperplasia,
, z% v- }4 c% V* Xeither 21-hydroxylase deficiency or 11-β hydroxylase
. a( i1 ?6 `0 M0 H$ H0 _+ X; zdeficiency. Those diagnoses were excluded by find-' f% R" J# u. G. `
ing the normal level of adrenal steroids.
' A# ~- w+ u# F9 \# c$ J* ~3 mThe diagnosis of exogenous androgens was strongly
! ^6 O7 X, z: j6 e7 ^suspected in a follow-up visit after 4 months because
) P$ {# c0 D: T3 V$ S/ p6 h: Wthe physical examination revealed the complete disap-7 Q9 V5 Z' b! p
pearance of pubic hair, normal growth velocity, and m3 E& K0 l! J+ v9 y0 a2 N/ h4 T
decreased erections. The father admitted using a testos-* u0 i& T: e& N3 Y9 \ m/ L$ j* O
terone gel, which he concealed at first visit. He was
" T z y/ b0 H" s2 Gusing it rather frequently, twice a day. The Physicians’
; o( ]) l4 u( {" l/ G% f0 @: VDesk Reference, or package insert of this product, gel or
/ m% m6 C/ D' lcream, cautions about dermal testosterone transfer to R/ _( N& F& E1 _5 }) ~
unprotected females through direct skin exposure.( c3 O- T6 Q$ O* _
Serum testosterone level was found to be 2 times the
1 W) V z# w! |: q! S* D" {baseline value in those females who were exposed to
) V5 Q& C8 T4 C) v l4 W6 b+ Peven 15 minutes of direct skin contact with their male
0 [: V c# L# m, V9 R( W0 Kpartners.6 However, when a shirt covered the applica-
8 ?; r; Q: O3 [3 N! R% _4 ]/ o: B; ?tion site, this testosterone transfer was prevented.
. Q$ s' E- A7 C# ^3 g' S9 n: zOur patient’s testosterone level was 60 ng/mL,0 ~/ d+ J; b, u3 V L. f3 }
which was clearly high. Some studies suggest that
8 c6 L5 P: z9 F& w& w" _3 ^/ Cdermal conversion of testosterone to dihydrotestos-/ P- L; j9 r% e% \9 {
terone, which is a more potent metabolite, is more
! B: n- _- s- u. [& c8 bactive in young children exposed to testosterone# f" n* D% B3 r A) O$ D ?
exogenously7; however, we did not measure a dihy-! d9 Z1 U5 r, r# _8 x
drotestosterone level in our patient. In addition to: G: D# `0 R/ E
virilization, exposure to exogenous testosterone in6 v7 f! K+ P$ ~
children results in an increase in growth velocity and
8 W6 ~0 e. {4 X4 ~- a4 E+ fadvanced bone age, as seen in our patient.
$ L* T U: D3 a1 w- v! j0 PThe long-term effect of androgen exposure during9 H6 S V. l9 i% r
early childhood on pubertal development and final
0 e; ] y1 a# t6 Vadult height are not fully known and always remain
: B, P2 s" A* F) L5 p' g ^a concern. Children treated with short-term testos-+ c' u$ C7 D# {8 W
terone injection or topical androgen may exhibit some
9 g$ v' g3 l/ b* V. R0 ?3 O( Macceleration of the skeletal maturation; however, after/ r e1 L8 q/ ^! y0 }2 H) O4 V- W
cessation of treatment, the rate of bone maturation
% m& v d' ?1 o0 E: wdecelerates and gradually returns to normal.8,9' e1 B( ` Q/ j* [% n; d
There are conflicting reports and controversy
0 k M; Z. N* ?6 c/ j/ aover the effect of early androgen exposure on adult7 u& K. B5 G( \9 N9 d8 p
penile length.10,11 Some reports suggest subnormal& B' w' X4 R( @7 Z
adult penile length, apparently because of downreg-7 f( h# b; [% Y* z6 V4 x
ulation of androgen receptor number.10,12 However,
; n4 Y. }1 b8 D. N: q" _8 KSutherland et al13 did not find a correlation between; r Y8 u2 A4 b0 b
childhood testosterone exposure and reduced adult2 g9 L6 T; r5 H" s$ Y4 t
penile length in clinical studies.# T3 Y' D% _% Q+ w- ^% x
Nonetheless, we do not believe our patient is" G4 J6 s# ]% ]/ D; K, d0 }- R6 T+ w* w
going to experience any of the untoward effects from
, _ X& K# J0 A% d" }! J6 vtestosterone exposure as mentioned earlier because
# y" Y1 f0 \2 I5 uthe exposure was not for a prolonged period of time.3 T0 }& D1 G0 ~& v. P, F
Although the bone age was advanced at the time of3 G4 v/ c* p. H- Z ]. B
diagnosis, the child had a normal growth velocity at! F5 I F8 A" \# a3 w
the follow-up visit. It is hoped that his final adult0 c2 `$ x4 B9 {* m6 O6 x E
height will not be affected., m% ^2 D' h) p% d* Z) [ `
Although rarely reported, the widespread avail-
; a& E: B7 E7 R7 y2 Rability of androgen products in our society may* c7 X. c6 }& o& i8 Z: o2 ^3 s) Y
indeed cause more virilization in male or female
a. Z9 M6 [" s6 Q- x- Ichildren than one would realize. Exposure to andro-& O7 ^9 M8 U# B5 w7 j
gen products must be considered and specific ques-
, k$ ^" d" Y" r( ?" e0 h0 mtioning about the use of a testosterone product or
7 x; N1 q: z: {6 _( ngel should be asked of the family members during- Q+ h1 s8 _1 j- R
the evaluation of any children who present with vir-
0 P6 i6 T% I# C, C, {4 W- oilization or peripheral precocious puberty. The diag-
# h4 p0 z w7 b/ D1 Gnosis can be established by just a few tests and by7 M5 s% I2 h' H; h
appropriate history. The inability to obtain such a6 d- r5 T% u$ E* U2 r7 Y
history, or failure to ask the specific questions, may
( s9 o. N8 U Z) `$ Y( r4 tresult in extensive, unnecessary, and expensive. ^3 k8 [, T1 d+ l
investigation. The primary care physician should be
- ]5 M8 R8 m- }( z; oaware of this fact, because most of these children% C' R; k+ _ L) z# K: Z; I3 U
may initially present in their practice. The Physicians’
' C/ z+ ~' c, V0 b$ m7 hDesk Reference and package insert should also put a+ D! v$ X" q8 {% X) `# W0 ?
warning about the virilizing effect on a male or/ A1 |8 `% W1 S4 X( Q+ y
female child who might come in contact with some-5 d" q w# o' z9 X% ]
one using any of these products.
6 q4 M4 ?3 B2 X9 }References% \: Y6 K4 a/ o8 H% J! G* q
1. Styne DM. The testes: disorder of sexual differentiation
% ]; W! F8 }( Z. I# wand puberty in the male. In: Sperling MA, ed. Pediatric
|1 O2 m6 [ H$ wEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;" Q3 A/ ~2 X. D! E- C$ _& o
2002: 565-628.* U2 {" M& |" n; f4 B N: K
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
' | h$ K/ U0 D: S epuberty in children with tumours of the suprasellar pineal
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# l2 z( c/ f: k _areas: organic central precocious puberty. Acta Paediatr.
8 l* H9 M. s6 @2001;90:751-756.1 ^) D, \; i% I2 H
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
' O" l6 b- j' {& a- s& MPediatric Endocrinology. 4th ed. New York, NY: Marcel' v3 W2 M( q/ i% a( Q1 A
Dekker Inc; 2003:211-238.
& H4 x4 ?- Z z# ^. K4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
2 x4 H' x0 y* edevelopment in a two-year-old boy induced by topical
8 k& T4 u% w! J) `& Pexposure to testosterone. Pediatrics. 1999;104:e23.& J( e! K# P: N9 u
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of& J$ o, B v u: B
Skeletal Development of the Hand and Wrist. 2nd ed.
$ D. @$ n8 j( l y( {1 Z8 nStanford, CA: Stanford University Press; 1959.
; R' M9 Q }$ E$ n) C+ e9 N) ?3 {( @6. Physicians’ Desk Reference. Androgel 1% testosterone,
. R/ a }6 ~1 A* ]Unimed Pharmaceutical Inc. Montvale, NJ: Medical2 \& ]! f' K) g2 J: D% j/ Z
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