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is a significant concern for physicians. Central
) V1 `4 g- c' a$ t6 B4 }9 I4 Q) yprecocious puberty (CPP), which is mediated
0 d7 g/ b7 M$ a: Dthrough the hypothalamic pituitary gonadal axis, has- T2 X- N" Q0 B7 }2 r* }
a higher incidence of organic central nervous system
4 ` Y1 v, Z( \5 \- hlesions in boys.1,2 Virilization in boys, as manifested! J. q% e3 ?: v( ^. l; g
by enlargement of the penis, development of pubic+ A9 B& r' C6 P U
hair, and facial acne without enlargement of testi-
- M( z6 w5 g6 y; S/ v3 ]cles, suggests peripheral or pseudopuberty.1-3 We
o8 h5 E- O! l$ _3 kreport a 16-month-old boy who presented with the
( d' g. W h) g3 [! m9 S7 Renlargement of the phallus and pubic hair develop-. V2 q7 a6 b4 o8 E8 _/ y' R' A" @
ment without testicular enlargement, which was due
9 t, Q3 v+ s6 |: s' Dto the unintentional exposure to androgen gel used by3 O. d, S X5 |+ O8 Q; ]
the father. The family initially concealed this infor-
" t9 q- K( ~! g" w! @' Emation, resulting in an extensive work-up for this ?1 |$ H3 ~7 u! k2 }8 z
child. Given the widespread and easy availability of+ d4 a: U; p C+ T
testosterone gel and cream, we believe this is proba-, @. k: m- k( z# }, K
bly more common than the rare case report in the8 _4 G, F3 |$ B
literature.4
7 g: ]+ R6 n6 W* Q7 f+ L) h; v7 n( GPatient Report
) I+ a f r1 g- z1 k( x+ a4 `A 16-month-old white child was referred to the3 [) A; Z2 {! n* g4 g5 G! X! W
endocrine clinic by his pediatrician with the concern% j p5 k2 h1 u; P$ g" p. b! s$ A
of early sexual development. His mother noticed" L. }8 a3 w& I$ g
light colored pubic hair development when he was3 L8 R/ z1 M4 f: j
From the 1Division of Pediatric Endocrinology, 2University of
0 _9 ]: q0 R6 J7 v) KSouth Alabama Medical Center, Mobile, Alabama.5 B% A; u) N& @) G
Address correspondence to: Samar K. Bhowmick, MD, FACE,$ H* K6 G# c6 k: Q7 a
Professor of Pediatrics, University of South Alabama, College of
6 O7 C( Q* j: H6 i( ~6 D( IMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;3 y- x* I( F/ d4 w( w; b) _
e-mail: [email protected].+ s1 V3 }# g5 K
about 6 to 7 months old, which progressively became
4 B3 e; R- e( g; ~5 \darker. She was also concerned about the enlarge-& A( Q! i ^5 v5 f! z6 k3 T
ment of his penis and frequent erections. The child
7 i2 ~* Y+ W# Vwas the product of a full-term normal delivery, with: Z i3 O ]1 _+ A% J0 F/ E
a birth weight of 7 lb 14 oz, and birth length of* _3 N( x# J+ `& O6 ?/ M
20 inches. He was breast-fed throughout the first year
7 o1 q3 ?$ y6 a8 O! ^3 Nof life and was still receiving breast milk along with `. Z% Z9 e" g& b4 E. C2 H
solid food. He had no hospitalizations or surgery,
& _" a* o+ I- J, e) ?and his psychosocial and psychomotor development6 v3 @/ Q, S) L2 m# |" ^
was age appropriate.
9 n3 Q+ C: s. b0 @3 c2 ^& GThe family history was remarkable for the father,
0 D# g$ B; T: ^( ]& s/ Vwho was diagnosed with hypothyroidism at age 16,
4 ~$ M) I7 f. X4 ]" P1 j5 x* w/ S; Twhich was treated with thyroxine. The father’s
/ E! x, q4 J! u; g, vheight was 6 feet, and he went through a somewhat) X6 m& \ W) E" l6 ^
early puberty and had stopped growing by age 14.) R+ D( F' R" z" G
The father denied taking any other medication. The
0 S( N9 s H3 \3 A! |child’s mother was in good health. Her menarche
7 r: j2 ]/ i7 U5 K9 Jwas at 11 years of age, and her height was at 5 feet, m V& U2 e/ A
5 inches. There was no other family history of pre-
9 y/ i% d7 v2 C' v, k. vcocious sexual development in the first-degree rela-
8 F; S1 q/ l& k& d* ~" _3 _' ytives. There were no siblings.% ]4 j' q4 Q, U
Physical Examination
7 T: z' L! x, q. o9 W: ?The physical examination revealed a very active,
3 w2 Y6 c* y% C; p' e! C" i: mplayful, and healthy boy. The vital signs documented. G7 j8 X& Q: V2 `# X1 ^$ `9 S
a blood pressure of 85/50 mm Hg, his length was
4 F- L. a& W8 u90 cm (>97th percentile), and his weight was 14.4 kg+ v# P! O) O4 o9 @5 B* a- X- r
(also >97th percentile). The observed yearly growth+ Z+ L: f+ } p$ r/ v, j) d: o
velocity was 30 cm (12 inches). The examination of! @( s6 [# w) i% g) y% p* N/ o
the neck revealed no thyroid enlargement.3 b9 a( W2 q0 |) B+ e/ m! D
The genitourinary examination was remarkable for! R- p- Y% V$ ^" a6 w5 t1 v
enlargement of the penis, with a stretched length of! S% N. n& p* Y8 q& _8 T; E
8 cm and a width of 2 cm. The glans penis was very well- s7 w/ Z c! C, V( M2 N
developed. The pubic hair was Tanner II, mostly around+ k4 c: U: n% o6 P0 r" O& s
540
+ A7 k0 l; W" s3 m& Mat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% A9 f' F. \0 i0 J/ L* y. T0 n
the base of the phallus and was dark and curled. The, @& T) T; z2 {9 o7 S
testicular volume was prepubertal at 2 mL each.7 \+ R. F7 f/ j: K, u$ r: e) r
The skin was moist and smooth and somewhat' I1 L' ?( @1 a( l$ U$ D
oily. No axillary hair was noted. There were no+ `5 y5 \* R, x4 o8 b3 G
abnormal skin pigmentations or café-au-lait spots.0 }% ~- @7 X; {+ L9 n) |
Neurologic evaluation showed deep tendon reflex 2+8 H8 {! m8 d2 i
bilateral and symmetrical. There was no suggestion
) t& v1 x) g- O4 A. L: b) cof papilledema.
, H: N1 R: N- [" fLaboratory Evaluation( w9 r0 E$ O/ ? a D4 d" K
The bone age was consistent with 28 months by
$ k; H! y, E8 P" |& Qusing the standard of Greulich and Pyle at a chrono-
& L8 i a* ]/ g: Z' J& B. }logic age of 16 months (advanced).5 Chromosomal3 f) u. v+ X' {. E1 O4 H0 Z2 O
karyotype was 46XY. The thyroid function test% U/ Z( t* m* m3 a% q
showed a free T4 of 1.69 ng/dL, and thyroid stimu-" E- ?+ b1 b# Y3 g- i- V C
lating hormone level was 1.3 µIU/mL (both normal).
* m Q2 e$ G: g& i% zThe concentrations of serum electrolytes, blood
7 j- G; F+ V: a1 j6 K2 Murea nitrogen, creatinine, and calcium all were# j+ ]$ t- C+ [# F' u
within normal range for his age. The concentration6 V3 j4 P/ y/ I
of serum 17-hydroxyprogesterone was 16 ng/dL# K+ o9 Q) {4 Q6 j; {
(normal, 3 to 90 ng/dL), androstenedione was 20* d7 ]: S7 k/ V
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-. h" h" L8 D5 ^& e8 y% A
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
$ \* D( Z7 ]4 p4 d8 F5 ~desoxycorticosterone was 4.3 ng/dL (normal, 7 to
: }3 d5 T1 P( \. q: w49ng/dL), 11-desoxycortisol (specific compound S)
1 \# ?6 W4 F4 }- j. qwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
5 X7 J: k0 U2 h8 Y3 }tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
7 r3 q; l6 @+ ?8 y% \# K Y. otestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
8 }; u: n1 L' B5 y" F, A \and β-human chorionic gonadotropin was less than
9 ^+ c& p* i4 U5 mIU/mL (normal <5 mIU/mL). Serum follicular2 R- f) N# _- j/ E* Z, I
stimulating hormone and leuteinizing hormone
, u* O7 Y' p. d4 {+ Pconcentrations were less than 0.05 mIU/mL
0 ?8 X- J. q! R(prepubertal).2 h/ Q L$ p2 p6 X& q1 g; F/ u# f
The parents were notified about the laboratory% r% h$ I: S9 x, b
results and were informed that all of the tests were
' I& v5 C/ R. O* l y' ?normal except the testosterone level was high. The
( Q- Z9 E. u5 G% \! h. ~" Ffollow-up visit was arranged within a few weeks to
+ q- D5 m6 |7 S+ X9 Eobtain testicular and abdominal sonograms; how-
' }/ \) z$ @+ X% k0 l1 g3 S! b1 L- k& bever, the family did not return for 4 months.; k& }6 K7 R7 \+ n& |6 a0 D4 G
Physical examination at this time revealed that the( q3 e {' J5 C! g
child had grown 2.5 cm in 4 months and had gained
* e3 D5 k6 V$ E2 kg of weight. Physical examination remained
9 M* b" ^7 g7 r& ^) @3 M4 g" ~unchanged. Surprisingly, the pubic hair almost com-. f; T- ]/ _% F8 o) ?
pletely disappeared except for a few vellous hairs at
+ y F6 m$ e4 a5 Uthe base of the phallus. Testicular volume was still 2
3 n7 Z6 v2 E* B% ^ P+ smL, and the size of the penis remained unchanged.: d' G8 W5 L/ V1 I8 F; L8 d
The mother also said that the boy was no longer hav-1 f0 i3 ]& J( w" H
ing frequent erections.
5 a% e. ]5 M, J7 g9 ]( zBoth parents were again questioned about use of
/ l2 L. L* j3 H) Iany ointment/creams that they may have applied to
# t1 N R' v! O! o \the child’s skin. This time the father admitted the. D# H ]0 Y8 S; ?3 S/ v
Topical Testosterone Exposure / Bhowmick et al 541# Y7 }/ z- w5 M3 n6 z2 o3 F
use of testosterone gel twice daily that he was apply-
' e9 A7 m1 G4 t3 a, b- fing over his own shoulders, chest, and back area for; \# C3 x( ?1 b
a year. The father also revealed he was embarrassed
8 {# N7 A( v* Y' ^2 xto disclose that he was using a testosterone gel pre-* Y9 `5 b; d6 |
scribed by his family physician for decreased libido
: K2 H% {- O8 N3 e" d# Ksecondary to depression.. J" \3 g7 p2 @ o- z- d# R* f7 A
The child slept in the same bed with parents.0 A" h, }9 q) P) K" \/ ` G
The father would hug the baby and hold him on his
b2 r4 Q. @4 Zchest for a considerable period of time, causing sig-) n: n: F+ u6 j% a" N. W9 a. O
nificant bare skin contact between baby and father.
( q5 Q+ d! T. a$ K/ dThe father also admitted that after the phone call,: q4 k. J2 p- U+ Y: k! y. v6 E
when he learned the testosterone level in the baby
, k5 z3 d9 ]& N% J6 U" r/ y x0 kwas high, he then read the product information
2 k5 Z% L: _# Epacket and concluded that it was most likely the rea-( r6 c; b( h- c# j [, y7 `" q' M
son for the child’s virilization. At that time, they
8 N8 {# T9 h. q; idecided to put the baby in a separate bed, and the
* p% ~/ I! v+ Mfather was not hugging him with bare skin and had" z* p9 I. b* t# w, I! _
been using protective clothing. A repeat testosterone" H2 j/ J4 x8 m5 J0 `/ M0 Z' h
test was ordered, but the family did not go to the( _% V; v) I3 r- s% b
laboratory to obtain the test.; g: L% E' m8 C' e t. n1 m
Discussion0 T" z' I! i" f, c. n! G' w
Precocious puberty in boys is defined as secondary' {& m _" }0 x: r9 v( S
sexual development before 9 years of age.1,41 U8 y) i& F U6 @3 |
Precocious puberty is termed as central (true) when
9 D/ V2 W$ F/ |! I0 Q9 wit is caused by the premature activation of hypo-' u6 g& z' U# i$ f" R/ p- j( P
thalamic pituitary gonadal axis. CPP is more com-/ R4 G; W3 h! I" O$ B) M
mon in girls than in boys.1,3 Most boys with CPP9 [1 c' a# W+ h I, {+ L
may have a central nervous system lesion that is
; R" a5 Q* R; F$ Oresponsible for the early activation of the hypothal-* t& m0 J3 M9 P0 y0 X+ \
amic pituitary gonadal axis.1-3 Thus, greater empha-& |, G( Z( m/ w8 r' ?. |; E
sis has been given to neuroradiologic imaging in
3 O+ f, v& l9 R" I1 L$ v* n; b+ F: Xboys with precocious puberty. In addition to viril-
/ u# `$ l, |6 L( \ization, the clinical hallmark of CPP is the symmet-
0 f& N- I% a' c, {+ Z- a2 I5 Mrical testicular growth secondary to stimulation by2 y( J$ y) M- ]& o X
gonadotropins.1,3. N& r6 k. u$ z7 S- }% o# |2 i2 ~
Gonadotropin-independent peripheral preco-* ~& f) q# G0 y* \1 q5 A
cious puberty in boys also results from inappropriate4 K( I+ N+ ~! `& D: ^" g9 ]. f$ r
androgenic stimulation from either endogenous or
$ x8 n, J- b2 uexogenous sources, nonpituitary gonadotropin stim-
# O, E7 b7 s) Y/ j9 k' g8 o. `! mulation, and rare activating mutations.3 Virilizing' b7 \' @* j: S8 T0 k, B
congenital adrenal hyperplasia producing excessive* x( B# |0 r# x3 b. ?! ^8 x
adrenal androgens is a common cause of precocious
( [* c: g6 v) H! O R. Jpuberty in boys.3,4
- Z- V: H) q( W2 y. H8 QThe most common form of congenital adrenal
: \8 o% u* t. Dhyperplasia is the 21-hydroxylase enzyme deficiency.# s! i; P+ U" M6 X6 F
The 11-β hydroxylase deficiency may also result in
1 W# e' P- W& w+ Wexcessive adrenal androgen production, and rarely," Q, y! ^0 W! u8 E1 h
an adrenal tumor may also cause adrenal androgen
; | r# D4 |# Xexcess.1,3, _5 D$ B& b, U. p' J
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% {! y8 {9 Q& D) I( W6 n1 K
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007: S6 B6 a3 A3 }% _; ^9 I2 N
A unique entity of male-limited gonadotropin-* [) g; Y- E0 M ~
independent precocious puberty, which is also known
$ s' x% @; {4 u" _7 I0 tas testotoxicosis, may cause precocious puberty at a# s1 d6 S& O d
very young age. The physical findings in these boys
- `3 W( R0 I, x& O& f/ \1 H# |0 Ewith this disorder are full pubertal development,
- j* l0 Q3 h* b2 V- l( h+ ~including bilateral testicular growth, similar to boys
/ f) ^6 Y! f& bwith CPP. The gonadotropin levels in this disorder% y. c( T1 y5 ?
are suppressed to prepubertal levels and do not show
0 L" T) G, J" p7 K! s! t1 Gpubertal response of gonadotropin after gonadotropin-3 R" D' k8 [' V; j9 \
releasing hormone stimulation. This is a sex-linked7 u$ U3 @* ]0 a4 i' e" h/ B7 ?! [" C
autosomal dominant disorder that affects only
4 F. M; f, G& X. D1 [/ Imales; therefore, other male members of the family
( Y' q2 B; V* a. Vmay have similar precocious puberty.34 t) p; D8 f; H# l( k0 C" w
In our patient, physical examination was incon-1 Q: L" k7 A, i; Z3 i. f3 \7 @9 U
sistent with true precocious puberty since his testi-
, d* {+ S, k* h4 i* Rcles were prepubertal in size. However, testotoxicosis3 ~9 y( r: L) R# V* `/ W' X. c
was in the differential diagnosis because his father7 b# v9 `( I+ c e5 h4 g8 N% r
started puberty somewhat early, and occasionally,
2 q. a: L: ^. A4 _testicular enlargement is not that evident in the$ |6 n d, N* F# V" w% D
beginning of this process.1 In the absence of a neg-: T2 z7 e# W; ]7 w# s. P! C# J2 W
ative initial history of androgen exposure, our
" e( S% R3 {: \biggest concern was virilizing adrenal hyperplasia,4 _* R/ A, g1 M/ M% y) U
either 21-hydroxylase deficiency or 11-β hydroxylase( `) R, `+ W& V+ B3 Q/ Q
deficiency. Those diagnoses were excluded by find-
0 S" u( g& Q0 y8 Cing the normal level of adrenal steroids., a6 E4 c# X& V1 L
The diagnosis of exogenous androgens was strongly. x7 w1 d& _5 e
suspected in a follow-up visit after 4 months because
5 D$ F3 v" B. kthe physical examination revealed the complete disap-" m3 o6 ^# W7 O7 g
pearance of pubic hair, normal growth velocity, and
1 `( Y; z' L& ~decreased erections. The father admitted using a testos-
k1 v Y3 T9 C* s$ H4 pterone gel, which he concealed at first visit. He was$ Y. F" |# C& s' R" A3 W/ o
using it rather frequently, twice a day. The Physicians’/ ]/ n0 r% L) O% h0 n- J3 _
Desk Reference, or package insert of this product, gel or# c+ H) M8 }: a% k- ^ c
cream, cautions about dermal testosterone transfer to1 w/ K, o* z' S$ H4 l6 H& O
unprotected females through direct skin exposure.' Z, U9 U K/ X9 o
Serum testosterone level was found to be 2 times the
8 r8 |. g6 I* _8 ]; b# y- ?9 L hbaseline value in those females who were exposed to L9 ^6 f! ~- V2 H
even 15 minutes of direct skin contact with their male e* d+ h8 {9 D- B; b# ]
partners.6 However, when a shirt covered the applica-7 f$ {1 \7 O' g/ l( U
tion site, this testosterone transfer was prevented.0 n9 N# w* f3 o+ X
Our patient’s testosterone level was 60 ng/mL,
8 v V4 b4 ~/ ^; i$ X$ ewhich was clearly high. Some studies suggest that
+ y1 ^1 _- a# ]2 m0 L& mdermal conversion of testosterone to dihydrotestos-
; W* _8 D; x2 d. I$ R; }9 \7 qterone, which is a more potent metabolite, is more4 f3 T! O D$ Z5 F6 z& f6 x; j
active in young children exposed to testosterone
" ~% N' [, P3 f' mexogenously7; however, we did not measure a dihy-7 w' D. ^ ]/ h" _
drotestosterone level in our patient. In addition to
8 V1 T! I8 ?, @9 A! p+ Ovirilization, exposure to exogenous testosterone in6 q- O. Q, d8 t2 Y0 R
children results in an increase in growth velocity and2 f3 m% {# q2 S6 ^
advanced bone age, as seen in our patient.
( c2 l6 [3 z% H) ?2 TThe long-term effect of androgen exposure during
" N6 f7 q$ ?/ O/ [8 |6 Pearly childhood on pubertal development and final
& j6 F" W. t8 x- c6 A$ e4 l2 `adult height are not fully known and always remain E# C1 N( w- `6 J7 o' a
a concern. Children treated with short-term testos-( v k$ {# T% h( f$ Q D
terone injection or topical androgen may exhibit some2 c/ I: `0 r! F' z# a! G1 e9 ~
acceleration of the skeletal maturation; however, after0 h) N) n* l2 i: Y
cessation of treatment, the rate of bone maturation4 z% ~8 [( u9 g7 N1 D
decelerates and gradually returns to normal.8,9
: g3 i" v, x. K: X1 ?. dThere are conflicting reports and controversy
* f/ M$ f# S/ Rover the effect of early androgen exposure on adult
6 {3 D9 F$ F; z) Zpenile length.10,11 Some reports suggest subnormal! x5 B! J# k) Z
adult penile length, apparently because of downreg-
: J& S2 S0 R) Mulation of androgen receptor number.10,12 However,
5 A* w6 E; C6 T' O$ s; W) m6 ?Sutherland et al13 did not find a correlation between
( b4 \- T! W/ `: g" e) mchildhood testosterone exposure and reduced adult3 I1 J" [$ z3 D$ [+ F' j+ ~
penile length in clinical studies.: P Q1 X' j. B- _' ~ p) B
Nonetheless, we do not believe our patient is9 R; [! W1 a, b, ^. Y) @; h
going to experience any of the untoward effects from" R$ Z @- \) E, \+ }, b4 A4 k
testosterone exposure as mentioned earlier because( B1 l# ]. V5 L R& Y, p
the exposure was not for a prolonged period of time.' \' i y& l; A0 f1 f% O
Although the bone age was advanced at the time of8 S- N4 D; z8 K9 O- }
diagnosis, the child had a normal growth velocity at. u4 X3 R0 |6 p0 C. W ~' y
the follow-up visit. It is hoped that his final adult8 I" g; z8 {, \0 z' v
height will not be affected.- @: W+ a7 T/ O+ N, }9 X' [" j# R
Although rarely reported, the widespread avail-, a; y* ]2 @8 Y; x7 P9 b/ A. [/ S# w
ability of androgen products in our society may
5 ]* P% ^- p3 l3 s! xindeed cause more virilization in male or female
. J. `. A6 q. r; D# G2 \" y, Tchildren than one would realize. Exposure to andro-
9 ^/ q( D" _$ }. O Cgen products must be considered and specific ques-; m4 ], z' u* Q. b$ Z- N) D3 O" l
tioning about the use of a testosterone product or
0 \2 S \; {) C& `& U; a7 v9 T" A& I% ^gel should be asked of the family members during! g4 E7 u" E2 Y; `! _
the evaluation of any children who present with vir-
# }/ G [ r$ ~3 V- g. l" {5 wilization or peripheral precocious puberty. The diag-" O6 m! I' Z1 T+ F- z1 i
nosis can be established by just a few tests and by
6 O6 F5 y4 U( b" q& V) N+ b+ dappropriate history. The inability to obtain such a
4 x* x- a7 e ^history, or failure to ask the specific questions, may
% N: K3 j# s- W6 _! `4 D1 I+ @result in extensive, unnecessary, and expensive* t* H: _2 i& Y
investigation. The primary care physician should be- j( i( X5 X- e5 N- \4 z; N
aware of this fact, because most of these children
( w6 U/ b% a9 j' a0 [- P- gmay initially present in their practice. The Physicians’$ x) R: N9 C1 k# E/ m, j0 d/ L
Desk Reference and package insert should also put a
# a) j8 W3 s4 l4 ~) u0 Z9 t e3 jwarning about the virilizing effect on a male or v- \" t" w8 ^, n% F
female child who might come in contact with some-: {! `9 d7 S# J6 {+ l5 _2 n
one using any of these products.
- Y& P+ _3 |- }, e" ~References
4 D0 l# \% R K, d. i, d; v2 R1. Styne DM. The testes: disorder of sexual differentiation/ E: f2 x7 h6 p8 @1 ]. `& |9 g
and puberty in the male. In: Sperling MA, ed. Pediatric) i" n8 K. K3 b+ _3 d5 E. K
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
! C& W" I! m5 f& Z& `, @& w2002: 565-628.
7 }. j1 v5 L9 j$ _ @2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
e6 z9 ?: y6 d0 W0 q3 [puberty in children with tumours of the suprasellar pineal
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Topical Testosterone Exposure / Bhowmick et al 543
8 v2 E9 P) Z+ L- p3 rareas: organic central precocious puberty. Acta Paediatr.1 `7 g, o2 C ~ L w; I
2001;90:751-756.& P& y' H- h4 C' m5 E7 u
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
: g& p8 c. f/ mPediatric Endocrinology. 4th ed. New York, NY: Marcel
1 |* Z+ ]7 D$ b$ uDekker Inc; 2003:211-238.
) L9 n: z0 L4 B) K4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual6 y7 x4 X; G- I7 k
development in a two-year-old boy induced by topical
4 Q5 |0 B% f& x" uexposure to testosterone. Pediatrics. 1999;104:e23.' x1 d k0 R7 V% E0 B
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
2 O2 p3 n; w0 r S/ a+ HSkeletal Development of the Hand and Wrist. 2nd ed.
6 v. q2 M/ a" T7 _ g; o6 R0 qStanford, CA: Stanford University Press; 1959.( L; Y( V5 P, z
6. Physicians’ Desk Reference. Androgel 1% testosterone,
" e% L( p6 N& Q: G4 y' e8 TUnimed Pharmaceutical Inc. Montvale, NJ: Medical
K% ?* y+ A/ ^) [" @$ N( qEconomics Company, Inc; 2004:3239-3241.+ y7 Y% E1 r. A6 N$ |! G
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