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is a significant concern for physicians. Central% `! v- [5 _7 M7 ]* x0 a! ~6 r2 P7 }! t
precocious puberty (CPP), which is mediated& V9 Y9 u$ I! c$ P9 Q. V1 z
through the hypothalamic pituitary gonadal axis, has
+ [7 F; W1 w7 {# ]2 t0 Ia higher incidence of organic central nervous system4 a0 z# j t- V) n0 g
lesions in boys.1,2 Virilization in boys, as manifested+ ?" L% ~: J) N4 P% u
by enlargement of the penis, development of pubic8 z0 n$ m+ x8 j% N9 f7 l9 _
hair, and facial acne without enlargement of testi-
- p" I+ s1 k8 @8 N! x2 ycles, suggests peripheral or pseudopuberty.1-3 We
3 b4 r7 z* A4 ?report a 16-month-old boy who presented with the0 V* v# g) J( `2 m" X
enlargement of the phallus and pubic hair develop-. L6 \5 I1 i2 J, s$ X
ment without testicular enlargement, which was due
$ Y8 M7 f# D E) f; Pto the unintentional exposure to androgen gel used by
% k; d8 }- T# Y4 Z6 {the father. The family initially concealed this infor-
4 f& S+ E& Z* Fmation, resulting in an extensive work-up for this6 E) l* R, ?2 u+ S5 f, w* z5 n6 I
child. Given the widespread and easy availability of4 Y: [! z8 R6 @
testosterone gel and cream, we believe this is proba-
2 t1 H. W' R4 u: W9 a% @( I' x, mbly more common than the rare case report in the& q; ^* f1 y- z) e6 f7 L: Q
literature.49 R8 a! o& n% b7 Q
Patient Report* i) F1 `! D: ~# e3 S$ T: }& e0 y& I
A 16-month-old white child was referred to the
6 I. Z0 M2 q; R' t: sendocrine clinic by his pediatrician with the concern- ~5 f8 X. q" S) q
of early sexual development. His mother noticed
+ e# B1 E" P5 @8 ]light colored pubic hair development when he was
, U1 t- j0 m9 EFrom the 1Division of Pediatric Endocrinology, 2University of
* H- e1 e7 m! t& a2 F+ eSouth Alabama Medical Center, Mobile, Alabama.! y& [+ M* D) h2 ^# }
Address correspondence to: Samar K. Bhowmick, MD, FACE,9 X. N. v+ Q$ E$ u
Professor of Pediatrics, University of South Alabama, College of
7 I+ d# ` ]/ ^9 q, O, T+ c; EMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;' o$ H% y8 K0 M4 Z
e-mail: [email protected].* ]5 E( S/ @: \, j+ ~$ W
about 6 to 7 months old, which progressively became
{* s4 v. @8 T: u5 x0 sdarker. She was also concerned about the enlarge- }# x U+ c- c. I
ment of his penis and frequent erections. The child
9 X! H1 |4 R' S% h1 Mwas the product of a full-term normal delivery, with, F: r8 s7 \1 l; ~) w' ?
a birth weight of 7 lb 14 oz, and birth length of) e3 o, r' ~: r4 S+ K
20 inches. He was breast-fed throughout the first year
1 k* p2 Q+ f9 t7 _$ q: R: s: @of life and was still receiving breast milk along with
0 n8 M5 _0 ]+ R+ V1 Csolid food. He had no hospitalizations or surgery,
4 ?7 V; [" B3 `0 R% uand his psychosocial and psychomotor development
$ ~ d! i$ r b* j% u$ Nwas age appropriate.+ k" `* P6 D9 s, R. s
The family history was remarkable for the father,
5 l+ I6 w5 c3 F" ?1 Xwho was diagnosed with hypothyroidism at age 16, c1 J( I$ ` V; f
which was treated with thyroxine. The father’s
5 m' N3 V0 x# B& L: Aheight was 6 feet, and he went through a somewhat2 X2 A$ p) `; |/ S: ?
early puberty and had stopped growing by age 14./ f8 v! x$ p+ S& {' a
The father denied taking any other medication. The
- [1 F$ Y+ t vchild’s mother was in good health. Her menarche
/ O# Y/ D$ ]* l: T7 Rwas at 11 years of age, and her height was at 5 feet ` N$ P* R! @, H$ `; R# S
5 inches. There was no other family history of pre-
1 l1 y2 ?0 `# g! m4 R" Ecocious sexual development in the first-degree rela- b+ E6 T5 G- `# w$ s, b
tives. There were no siblings. e, n$ {/ B _$ x( n. {4 h7 f/ A! s. k
Physical Examination1 ~5 ]: p6 x% e2 v, V9 L
The physical examination revealed a very active,2 m5 a% T7 \5 b7 }5 X* S
playful, and healthy boy. The vital signs documented8 w% e5 d$ K% T+ r( x7 @- k# D
a blood pressure of 85/50 mm Hg, his length was
+ D9 O$ D: s% I7 `. r/ z90 cm (>97th percentile), and his weight was 14.4 kg: I' _% X# q& m
(also >97th percentile). The observed yearly growth# E$ `2 a, d3 f$ q" ^
velocity was 30 cm (12 inches). The examination of
- V2 d) q0 {/ L: jthe neck revealed no thyroid enlargement.1 F: m6 K1 r7 k
The genitourinary examination was remarkable for
# T1 g* j7 b" O# T8 Qenlargement of the penis, with a stretched length of
. Z0 t/ N a- c9 j% a' R1 Z8 cm and a width of 2 cm. The glans penis was very well7 t) `7 p! q, G5 f! x( b' @3 Y8 S
developed. The pubic hair was Tanner II, mostly around1 ?* f( N+ l1 Z8 c; Y0 O# t D
540
3 N* `' F: U9 O9 A6 Iat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* c5 i( n$ w1 P) b: E8 _& d, t; \the base of the phallus and was dark and curled. The
" p" l+ \5 y9 v9 Y9 C+ C. y' h. htesticular volume was prepubertal at 2 mL each.2 B; F4 i2 P# r0 z& E( k9 u
The skin was moist and smooth and somewhat8 o5 \+ R2 ?. {$ L, u0 r, O
oily. No axillary hair was noted. There were no v# E* u2 b& b# h! h' u
abnormal skin pigmentations or café-au-lait spots. t7 M( ~0 G0 \
Neurologic evaluation showed deep tendon reflex 2+" Y, p- d, o$ V9 U4 q! A1 u
bilateral and symmetrical. There was no suggestion+ Q# ^5 T0 \, H+ `6 R
of papilledema.% H" K- m D: G/ Z7 S
Laboratory Evaluation9 u5 x6 P: d% M2 [" i
The bone age was consistent with 28 months by! j3 l; m9 W$ H. h* n
using the standard of Greulich and Pyle at a chrono-
% L& `9 f; w) e; e7 dlogic age of 16 months (advanced).5 Chromosomal
$ S* q( H( ?0 A* h0 skaryotype was 46XY. The thyroid function test# l3 O5 m. n! v
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
! N" m6 u6 v' ^2 U* f1 K& F, P: qlating hormone level was 1.3 µIU/mL (both normal).
5 E1 x; d2 I- g" o2 F( NThe concentrations of serum electrolytes, blood
4 c2 N1 X6 M3 P q+ J4 Z; a7 A# murea nitrogen, creatinine, and calcium all were1 g7 ?" I7 f! |6 a. T( M3 P
within normal range for his age. The concentration* U7 @4 z3 \1 V
of serum 17-hydroxyprogesterone was 16 ng/dL
0 m0 B: Y5 D1 U2 k# c5 r+ W) }* P, Q(normal, 3 to 90 ng/dL), androstenedione was 20' L( ]) W# w+ g: h, H- |
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-* Z% n7 t. ]8 b' U- o) V4 V$ C# ]
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
: |) D( r5 e% k( Q' Z, e' hdesoxycorticosterone was 4.3 ng/dL (normal, 7 to. e5 S1 x) l6 z: e' W H
49ng/dL), 11-desoxycortisol (specific compound S)
* {3 S! a; d& dwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
; i: f; I7 A. k- x! jtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total1 o- I9 ? w' H
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),# N) I! }4 O+ q8 C, Z& p
and β-human chorionic gonadotropin was less than7 j: A [ o0 n9 n* z# T1 N
5 mIU/mL (normal <5 mIU/mL). Serum follicular
! G6 `! l% J" F* i3 t6 qstimulating hormone and leuteinizing hormone
/ G/ z4 J) _) A$ q! Z4 bconcentrations were less than 0.05 mIU/mL/ ~9 o! w" X- [. q& Y0 A; r
(prepubertal).
" b. N5 p1 J8 l+ \& A, uThe parents were notified about the laboratory- o& n, p. ]8 W6 n% ?0 C
results and were informed that all of the tests were7 n; a7 y' S$ n2 y- f8 X
normal except the testosterone level was high. The
5 ~8 w# }; A+ p+ H; p1 H% P2 sfollow-up visit was arranged within a few weeks to
( Q4 P- D8 ?5 l* Q' @6 x" n3 a( gobtain testicular and abdominal sonograms; how-
, h; m$ _6 S; q J% Z8 [ever, the family did not return for 4 months.
" \( \: ?1 M2 L+ }3 }Physical examination at this time revealed that the* ^# X- v2 f; t" W( R2 i' e+ Y7 W% l
child had grown 2.5 cm in 4 months and had gained6 \1 \" T& I6 @" P7 S6 R& f5 f
2 kg of weight. Physical examination remained" B8 G5 n9 _1 u: u" i! u% D
unchanged. Surprisingly, the pubic hair almost com-( W; V3 E1 o6 U* P& h
pletely disappeared except for a few vellous hairs at
4 f- }8 z7 m r! |# M. Dthe base of the phallus. Testicular volume was still 2
! f w9 D8 M5 c. I1 CmL, and the size of the penis remained unchanged.
1 B: v: Q7 C- c5 WThe mother also said that the boy was no longer hav-
4 T5 w# s# ^: cing frequent erections.
2 E) Q0 [: `- J' x4 PBoth parents were again questioned about use of, Q4 c8 @% U. u6 o* J0 e* r ~
any ointment/creams that they may have applied to
; P; ?! O. O& J) jthe child’s skin. This time the father admitted the7 t) P, ^) v# x% S: N" T
Topical Testosterone Exposure / Bhowmick et al 541
( w) C. O' m/ i" U$ B. Yuse of testosterone gel twice daily that he was apply-. i" H, N3 q" |; G( ^
ing over his own shoulders, chest, and back area for
% v1 b8 Q/ a' M2 Q! X, `a year. The father also revealed he was embarrassed
+ b# D5 L! \2 B0 r2 vto disclose that he was using a testosterone gel pre-% L" [/ A1 i# X" F" a
scribed by his family physician for decreased libido0 z9 T# Q+ g6 a( \# f. \; ]. c
secondary to depression." m; g( _. ~3 R+ _3 \( M
The child slept in the same bed with parents.6 z. i) B2 v7 c6 m3 b7 D
The father would hug the baby and hold him on his7 J" Y% S+ U% ], W" \; ^; Q
chest for a considerable period of time, causing sig-
- E0 \5 H6 V" enificant bare skin contact between baby and father.( V+ T: F6 U0 x/ K4 k
The father also admitted that after the phone call,
& a% h, u8 _% a+ Uwhen he learned the testosterone level in the baby
1 k* Z( Q I* `! @- Jwas high, he then read the product information' Q& }; s% o, f( o0 ]9 {
packet and concluded that it was most likely the rea-) @6 h4 J, O$ K! S4 ~8 v
son for the child’s virilization. At that time, they
, x" W: Q% \; H! Q2 D3 |5 p l8 E; S* Y2 Z8 ddecided to put the baby in a separate bed, and the
0 B: A/ B) H' yfather was not hugging him with bare skin and had; K; X% y4 y" U, o9 a# }; V* M* O
been using protective clothing. A repeat testosterone
% L+ U: I7 e2 |+ ~1 E9 Dtest was ordered, but the family did not go to the
- Y5 V/ W% t4 \. Q2 |8 r9 Ulaboratory to obtain the test.. g2 Q. _5 H2 {- H: r1 P
Discussion
% n+ f" x# S' x( r0 P# JPrecocious puberty in boys is defined as secondary w4 {8 k& t9 e5 N! ]$ k1 d9 G
sexual development before 9 years of age.1,4
- [7 F. `+ x. CPrecocious puberty is termed as central (true) when( W3 t. m& q1 {, d
it is caused by the premature activation of hypo-
5 v# _( g7 o+ N) V% a; c$ wthalamic pituitary gonadal axis. CPP is more com-8 P Q. t! a- i' v6 g
mon in girls than in boys.1,3 Most boys with CPP
3 c1 e5 ?" @8 z4 ^' fmay have a central nervous system lesion that is/ _/ P+ S* l7 Y% x
responsible for the early activation of the hypothal-
& p$ w D7 l4 T& @3 t. R; q$ ramic pituitary gonadal axis.1-3 Thus, greater empha-
8 \* P. ^, b* Y5 d" Isis has been given to neuroradiologic imaging in
# K- k3 X# A( C: g* F& l6 E/ Bboys with precocious puberty. In addition to viril-
2 U: _9 ^/ W2 v& cization, the clinical hallmark of CPP is the symmet-
0 ?9 P" S* `4 D. ^4 Urical testicular growth secondary to stimulation by$ \7 n; l: |0 v$ e
gonadotropins.1,3
5 s& s+ R0 w% t/ B) m" r* hGonadotropin-independent peripheral preco-; s: X4 k7 L+ G& M
cious puberty in boys also results from inappropriate# Q% Q! |. y2 X% C7 f
androgenic stimulation from either endogenous or! N$ g7 d1 z: k! I" K
exogenous sources, nonpituitary gonadotropin stim-
, b, P, e" S$ P4 c/ B. Mulation, and rare activating mutations.3 Virilizing' H! S6 \( e3 ]3 l
congenital adrenal hyperplasia producing excessive9 e( o" h' K7 ^- y" z
adrenal androgens is a common cause of precocious
9 p' J, ?) ?+ Y9 [. n! ^puberty in boys.3,4
$ y4 s, r6 `, u; Q+ l& c3 GThe most common form of congenital adrenal: K0 s+ X6 R) ~4 [0 j, ]
hyperplasia is the 21-hydroxylase enzyme deficiency.5 D5 j5 G8 `' |: i
The 11-β hydroxylase deficiency may also result in; E! C/ o O2 t+ s
excessive adrenal androgen production, and rarely,
; U; G0 z" k+ V. w: h; U. ]an adrenal tumor may also cause adrenal androgen
# _/ S$ W+ h2 Texcess.1,3
& R1 f4 X6 V6 C, Xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 B- J" Y. T2 d/ G
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
9 C. d3 L1 d7 Q( Z/ \- J. o) Q/ oA unique entity of male-limited gonadotropin-
) p4 Q( z. d: b5 S) O! G2 P# sindependent precocious puberty, which is also known- W- {$ I* r" G* M0 {* l2 ]
as testotoxicosis, may cause precocious puberty at a
: N4 Q- i% @1 X' F9 k( z5 Xvery young age. The physical findings in these boys7 D& [+ X; M4 T: F* K7 t
with this disorder are full pubertal development, X8 Y/ U5 s4 Y9 R7 E: s F% g
including bilateral testicular growth, similar to boys% t; g. O$ m/ @( w* a( w
with CPP. The gonadotropin levels in this disorder+ E9 g; X8 A) L3 }! E: k- U
are suppressed to prepubertal levels and do not show7 ^5 m) D1 V. h3 f9 y& F6 |& W! N
pubertal response of gonadotropin after gonadotropin-
. f/ @& S: c# |4 yreleasing hormone stimulation. This is a sex-linked& F( \6 ^% F( @) h% m0 e1 |# G
autosomal dominant disorder that affects only: c/ L0 F% O& Q% F
males; therefore, other male members of the family4 q( z- W7 w' x: a
may have similar precocious puberty.3% h1 d% c0 C& g9 y" ?) y1 q- w
In our patient, physical examination was incon-
! [, j% t( m- i! fsistent with true precocious puberty since his testi-
$ N1 x8 |5 n" Kcles were prepubertal in size. However, testotoxicosis
+ i( S. u* ^. Y1 zwas in the differential diagnosis because his father! N/ d3 R" {" j# Y
started puberty somewhat early, and occasionally,6 `6 t; s- n: b! L" h, \. g
testicular enlargement is not that evident in the
5 u. t' Y6 G, |) A+ b9 wbeginning of this process.1 In the absence of a neg-! v- e* ]' l" p: a. V0 s
ative initial history of androgen exposure, our
. i+ P* g/ A/ Q' H% obiggest concern was virilizing adrenal hyperplasia,+ r; f6 G3 Y1 b" a
either 21-hydroxylase deficiency or 11-β hydroxylase* h3 [! `$ `' d
deficiency. Those diagnoses were excluded by find-
* j; D5 _3 ]! \ j4 j% Ting the normal level of adrenal steroids.
1 r' W4 P$ j) i8 \. _The diagnosis of exogenous androgens was strongly
- W: x( @0 n6 N; F3 R" c1 Ssuspected in a follow-up visit after 4 months because
, H( u7 ?4 o3 R. ^* i5 Lthe physical examination revealed the complete disap-! `& a* Z% d, b2 ]9 g \; }: A
pearance of pubic hair, normal growth velocity, and
( R& X1 I( ?8 C" w7 |8 Z3 M( bdecreased erections. The father admitted using a testos-
7 s, ~8 M+ \9 J) Z5 @terone gel, which he concealed at first visit. He was
$ a' h* f' H! ^+ g' n! |( G! Gusing it rather frequently, twice a day. The Physicians’- ~/ I* A) x3 ^5 s' b( E5 M
Desk Reference, or package insert of this product, gel or! j; g% s% Y; G& p+ X& ]
cream, cautions about dermal testosterone transfer to, \& r+ \2 `) l; h
unprotected females through direct skin exposure. L! H3 U/ c* J- k: M/ A
Serum testosterone level was found to be 2 times the
7 f8 \6 Q# @0 D d( W- F: tbaseline value in those females who were exposed to* B4 U1 G% o' D- x; C A" A
even 15 minutes of direct skin contact with their male* N8 W" C) e7 G+ _# |7 r1 j) A2 f* P; [( @
partners.6 However, when a shirt covered the applica-
# L, r5 E4 q; m$ a- Gtion site, this testosterone transfer was prevented.4 o, S4 O- \! Y6 d9 W
Our patient’s testosterone level was 60 ng/mL,
+ l d- ?! q* T6 @7 Twhich was clearly high. Some studies suggest that
( s! g0 o; u7 `8 G5 Adermal conversion of testosterone to dihydrotestos-
) D. Z$ x0 Q6 x3 ^$ v# wterone, which is a more potent metabolite, is more% a3 S0 b |5 u. r9 M7 S
active in young children exposed to testosterone. s4 p2 J7 N: y$ |. t. H1 E( A3 _- @
exogenously7; however, we did not measure a dihy-
9 l7 ?# P$ f, B2 {drotestosterone level in our patient. In addition to! @- I9 Q' o' R! W9 Z
virilization, exposure to exogenous testosterone in1 A) ~9 {0 i- n" P0 w/ W
children results in an increase in growth velocity and
( K# M1 I: ?) g5 aadvanced bone age, as seen in our patient.
. `* Y% a2 y9 S6 x4 N1 QThe long-term effect of androgen exposure during
. |4 v. ~& H* R4 A1 U% G% Q& zearly childhood on pubertal development and final _, v1 U4 v6 a% G7 \! O. n/ v
adult height are not fully known and always remain* Y {' x& h+ J; f; T! r, Z! d8 M
a concern. Children treated with short-term testos-
9 v, ^0 }# ^( C8 cterone injection or topical androgen may exhibit some; i! z* X7 ?. u" Q* P" z' U
acceleration of the skeletal maturation; however, after" U8 Q$ L o% v, ~, D
cessation of treatment, the rate of bone maturation
, L3 {3 e; D0 B9 W5 `& s9 \2 idecelerates and gradually returns to normal.8,95 U9 j/ t5 j+ | f, r8 g- h
There are conflicting reports and controversy
9 d7 I/ b# X/ W% D! _# z" iover the effect of early androgen exposure on adult+ P+ T+ O. [7 J* J7 {! m" B
penile length.10,11 Some reports suggest subnormal
( |2 P% Q2 W- B, r) [$ q% q: _adult penile length, apparently because of downreg-
- x$ Q9 y$ I! ]- I5 k2 V+ D0 Z. wulation of androgen receptor number.10,12 However,$ B2 N5 E- j" z! \/ Q3 F
Sutherland et al13 did not find a correlation between# W( [# b9 R$ D1 L4 v8 k) P
childhood testosterone exposure and reduced adult
5 t# n9 h% B# y- @: H7 x7 gpenile length in clinical studies.
- _8 j' W+ @: E( KNonetheless, we do not believe our patient is
* O; l, ^" p# M5 a! h3 qgoing to experience any of the untoward effects from
" u* _# q1 f5 P7 h( f( Z) Stestosterone exposure as mentioned earlier because
2 J+ s0 j- U _- q$ Xthe exposure was not for a prolonged period of time.
4 m4 h8 f5 n5 I& M9 _7 kAlthough the bone age was advanced at the time of
5 J, o3 ]: Z9 Adiagnosis, the child had a normal growth velocity at
( x8 z- D) h) [# E! N4 tthe follow-up visit. It is hoped that his final adult \; {& Y: {/ H q
height will not be affected.6 ?7 Q- P1 v' R
Although rarely reported, the widespread avail-* a5 F. p4 k7 m: l. o. w5 N
ability of androgen products in our society may" I# ?; @3 e, r
indeed cause more virilization in male or female
5 u! G ?- M5 j( ?3 Z" Xchildren than one would realize. Exposure to andro-
# q, s7 U$ u( y7 D. I8 wgen products must be considered and specific ques-4 a9 L! M6 X" b& n
tioning about the use of a testosterone product or4 q5 x! {( p+ s
gel should be asked of the family members during
& N0 _2 {1 q- x( @* f# ] E3 b% j lthe evaluation of any children who present with vir-
! C4 C, `" \2 Z, u+ iilization or peripheral precocious puberty. The diag-8 r4 f) m2 M( p5 T- K1 V. f
nosis can be established by just a few tests and by8 b" J! {# V* i: f+ c5 Q
appropriate history. The inability to obtain such a
% k8 t1 M' \+ R" V) Fhistory, or failure to ask the specific questions, may
% Z q$ [, x4 j [8 v8 H/ Nresult in extensive, unnecessary, and expensive
/ S4 U( o+ y2 R$ ?investigation. The primary care physician should be% i4 M) W# j* Z/ k4 A8 J
aware of this fact, because most of these children
' r% b/ n1 n0 b& q9 w5 r8 v* a" K/ Xmay initially present in their practice. The Physicians’
) s' N6 X4 `3 _6 z% jDesk Reference and package insert should also put a
- A5 f4 G1 \, y. o! m0 K/ [! Ywarning about the virilizing effect on a male or
% P8 C2 Y; N! ^! tfemale child who might come in contact with some-! R# x9 j4 O. [( {% r U
one using any of these products.
/ }' l6 m& o5 V4 M$ yReferences
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and puberty in the male. In: Sperling MA, ed. Pediatric
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) _8 j$ i0 h& D7 O$ m. F2002: 565-628.
4 L% O e4 u0 w- M2 x6 L( ?2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
7 U4 t( h2 m) N3 l" c7 I) mpuberty in children with tumours of the suprasellar pineal
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% C& p5 J* M0 L+ {: T" D; n- ZTopical Testosterone Exposure / Bhowmick et al 543
1 Y% D, T8 @8 D+ g9 J' eareas: organic central precocious puberty. Acta Paediatr.
, S: d6 ^( @& f! {+ O2001;90:751-756.
. p2 V' Z& ]/ q, `* ~3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.- o% J& o) q6 D( `, p: g, a) o
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Dekker Inc; 2003:211-238.9 @4 J$ |. `# r p7 S9 Z
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
3 I2 l9 ?6 a% K9 f' ]% ^- f$ V+ Ydevelopment in a two-year-old boy induced by topical: M( u3 |7 o4 c8 T) g. v
exposure to testosterone. Pediatrics. 1999;104:e23.
, [! u" R( A% y" R5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
; H8 l, n. a( y, fSkeletal Development of the Hand and Wrist. 2nd ed.5 N4 `- p, Q- ^% L0 m
Stanford, CA: Stanford University Press; 1959.
/ }( W) @. u4 I4 B% ]$ O8 W' {6. Physicians’ Desk Reference. Androgel 1% testosterone,9 S0 H6 b( ?4 ~+ o) a0 @' |
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
0 u9 c- n# O$ \Economics Company, Inc; 2004:3239-3241.
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