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is a significant concern for physicians. Central6 w g. e- u: n' X" m0 [0 r
precocious puberty (CPP), which is mediated; f+ y3 ^- K0 @# ^, `# }
through the hypothalamic pituitary gonadal axis, has; G f- K" Y4 y
a higher incidence of organic central nervous system2 F# ~+ j1 q R( m4 Z( }9 X6 r) \
lesions in boys.1,2 Virilization in boys, as manifested& X, V+ A1 u* e- z7 n9 b D
by enlargement of the penis, development of pubic
2 C! T' Y ]8 chair, and facial acne without enlargement of testi-
- q% M# ?8 B- `6 _3 S3 gcles, suggests peripheral or pseudopuberty.1-3 We
& n" {8 w: i; r7 s# ?4 \report a 16-month-old boy who presented with the
, J$ S( ~, l% f0 @2 ]( Benlargement of the phallus and pubic hair develop-
7 ], E' J5 k, |# E# Gment without testicular enlargement, which was due1 t' M0 U( z# o. x& O" }
to the unintentional exposure to androgen gel used by/ f: F8 l4 B d. v. }
the father. The family initially concealed this infor-1 _; m5 N" V, K1 b. f! s1 V
mation, resulting in an extensive work-up for this
& E+ K# U7 C6 Z5 G$ }# L- M/ @child. Given the widespread and easy availability of
5 M: v, p2 b" e6 R7 m, Ftestosterone gel and cream, we believe this is proba-
6 g+ K; L1 j; U: y& ]bly more common than the rare case report in the! w$ W: Y8 S2 i; f y% _; z4 z
literature.4+ U3 o H2 z6 b* A
Patient Report
# L7 f# P, m: \/ h0 p4 fA 16-month-old white child was referred to the, ~/ C4 |' Z* c" {
endocrine clinic by his pediatrician with the concern
: C. F7 e4 u/ [, [of early sexual development. His mother noticed
2 F2 u- }# E6 o. \. O9 e7 glight colored pubic hair development when he was
: ^5 l$ S' r; e- t4 a) @From the 1Division of Pediatric Endocrinology, 2University of# n8 v0 s$ m/ ]$ {2 @
South Alabama Medical Center, Mobile, Alabama.1 l/ G/ J. F: [" S% V! F- q
Address correspondence to: Samar K. Bhowmick, MD, FACE,) a4 [2 @7 e/ m( h+ H: @* h8 C4 ^
Professor of Pediatrics, University of South Alabama, College of A& Z* _+ ?; r% V4 F2 I4 X' {; i
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;; z0 t- E% `- r" D) z
e-mail: [email protected].0 K* r& ~6 B1 D4 J3 _4 @
about 6 to 7 months old, which progressively became
5 i# Y! y8 f0 b. x4 S" zdarker. She was also concerned about the enlarge-
! M* l) p7 U% O5 O& F( c: Pment of his penis and frequent erections. The child& i, ^$ Z& F& f; A6 C6 z( q- o
was the product of a full-term normal delivery, with9 T/ ?) X% ]. P" V
a birth weight of 7 lb 14 oz, and birth length of" q$ @4 x# j5 `) r. |! P4 D/ u
20 inches. He was breast-fed throughout the first year' b& x/ s: m8 m8 X7 x7 x2 T
of life and was still receiving breast milk along with
a. k9 @' W& D8 T8 b' zsolid food. He had no hospitalizations or surgery,- B% T& {, h a4 n; A
and his psychosocial and psychomotor development
$ z% k% F6 F7 ]3 Nwas age appropriate.: H. g4 _8 J* A* Z: a) {( ?9 w
The family history was remarkable for the father,
7 q# |5 I! v' J; m# k+ Ywho was diagnosed with hypothyroidism at age 16," M% s9 j$ W$ F9 b8 {
which was treated with thyroxine. The father’s
! ~3 H5 C. Z8 V) qheight was 6 feet, and he went through a somewhat
) g3 a3 H( K( s* u) H- I8 r8 Fearly puberty and had stopped growing by age 14.
1 I* B- n( v A7 m9 y& r& y# `8 [The father denied taking any other medication. The
+ ^$ u7 o' z# }" n1 j lchild’s mother was in good health. Her menarche
) f9 e7 P7 ]0 [" {was at 11 years of age, and her height was at 5 feet/ _& }7 `# @7 R$ i I9 W2 F
5 inches. There was no other family history of pre-
2 u; J0 J1 u5 |2 N# n) M: Tcocious sexual development in the first-degree rela-
; | }5 c1 L* e: Etives. There were no siblings.7 [$ ~; H& t1 ~8 B4 l. o2 h
Physical Examination( M$ `# n7 ^/ }; l- L; F
The physical examination revealed a very active,* d% h2 j) M/ ^3 X5 S& e
playful, and healthy boy. The vital signs documented
, Q4 d% e; P9 Q5 O7 za blood pressure of 85/50 mm Hg, his length was
7 ~9 L- D( o3 k9 V* a1 C# k) g90 cm (>97th percentile), and his weight was 14.4 kg# X* Y* w4 V* E, R6 Z4 X
(also >97th percentile). The observed yearly growth
" T/ h# D: w) R6 W$ I; d, W* Zvelocity was 30 cm (12 inches). The examination of: m2 ?/ A- A! \) n) Z# G
the neck revealed no thyroid enlargement.
5 s6 w* s5 ]* S+ TThe genitourinary examination was remarkable for
& d2 F' x% J( N* ?) f6 b4 \enlargement of the penis, with a stretched length of
! P1 A* I3 X( T' l+ o( m( J$ ^1 X8 cm and a width of 2 cm. The glans penis was very well
8 P; D0 s+ D) X, j) Kdeveloped. The pubic hair was Tanner II, mostly around
- a) S% B; u; B0 b& J6 C I1 S540+ E2 @+ ~ R7 F; j+ p X4 b. V
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from5 I* |* Z7 G5 I. t' H
the base of the phallus and was dark and curled. The
% Y3 K0 V$ |* U# E8 t% Gtesticular volume was prepubertal at 2 mL each.
- l2 ^; m& d) R) v, C; R8 D: oThe skin was moist and smooth and somewhat
! f" ]9 }" J7 u7 a4 n# W! koily. No axillary hair was noted. There were no
4 ~4 l$ T, X& H6 t% M1 tabnormal skin pigmentations or café-au-lait spots.
' Y" w1 S2 T5 s9 L; ENeurologic evaluation showed deep tendon reflex 2+! {3 Q4 o& E+ D
bilateral and symmetrical. There was no suggestion
! P9 U6 w4 I* s2 K5 G% T, bof papilledema.1 x8 n# B& o$ X9 o4 N: L. v
Laboratory Evaluation
$ d* v$ ?+ p4 A4 F7 |+ l* tThe bone age was consistent with 28 months by+ A- x) r# S: e5 m5 G$ S
using the standard of Greulich and Pyle at a chrono-3 }6 N9 [ f- _$ _5 P
logic age of 16 months (advanced).5 Chromosomal
9 N. d0 }' o2 A0 X! t& l/ gkaryotype was 46XY. The thyroid function test
) _; S4 D+ |3 bshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
& ~0 K, L+ ^; K3 Ulating hormone level was 1.3 µIU/mL (both normal).+ n. g1 }! b8 A6 q1 U; L G
The concentrations of serum electrolytes, blood
: F& }1 X' M* J s1 d0 t: S) Vurea nitrogen, creatinine, and calcium all were
- g! ]: l6 Z5 `+ T% v. cwithin normal range for his age. The concentration
0 Q, ~: x( ?. ^4 I# \of serum 17-hydroxyprogesterone was 16 ng/dL1 C. D4 u3 F& N1 g& \
(normal, 3 to 90 ng/dL), androstenedione was 20
7 E2 O) l3 g3 x- d2 |5 F, t, T6 qng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-* J i0 W! R' E8 n
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
6 I4 J) F& v) @8 y6 g! |desoxycorticosterone was 4.3 ng/dL (normal, 7 to
1 c! O4 N: c# Q, a. L/ k% r49ng/dL), 11-desoxycortisol (specific compound S)
a4 Z4 M; P2 y) D. Swas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-. q. Z3 O) S9 E& P1 F7 F1 X, A/ h
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
, @. J$ ?1 f( h% O/ i; @. }testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
. [+ t7 Y7 l' c4 x! ]& Mand β-human chorionic gonadotropin was less than" I) y3 w% l- z( e$ O
5 mIU/mL (normal <5 mIU/mL). Serum follicular
) R5 S$ ^# x2 ], b" H1 hstimulating hormone and leuteinizing hormone
; J; x0 K1 P: k) ?concentrations were less than 0.05 mIU/mL9 r5 p6 q/ v5 o1 `& f0 \
(prepubertal).
1 ^& e5 ~( I AThe parents were notified about the laboratory8 n' k7 \8 e \# S5 K% X
results and were informed that all of the tests were0 @7 }# u6 u" |( P O- l) R. }
normal except the testosterone level was high. The n" @$ ?+ ~) h0 \7 E
follow-up visit was arranged within a few weeks to6 h, N6 h& Z9 D: m- L4 B
obtain testicular and abdominal sonograms; how-
; [! g% E7 M7 x6 ^7 D, \ever, the family did not return for 4 months.0 U$ q/ z( o( [5 k' Q1 [
Physical examination at this time revealed that the I* Y( |$ t- H
child had grown 2.5 cm in 4 months and had gained4 P# V Y" Q( I8 I7 b, T2 X
2 kg of weight. Physical examination remained, y5 @% S, g0 d9 ]1 o
unchanged. Surprisingly, the pubic hair almost com-4 G" b% e. h, z- N# [" L u8 Z
pletely disappeared except for a few vellous hairs at: P! R5 B# H5 V7 f% i( c8 H' ]
the base of the phallus. Testicular volume was still 2
' H. d; {7 l) y1 t: g( Y1 WmL, and the size of the penis remained unchanged.6 E+ | q5 {5 K. A$ O/ r
The mother also said that the boy was no longer hav-
! s3 d4 S% _& Y/ T ]8 |. [ing frequent erections.$ o/ t) m5 P0 X1 E
Both parents were again questioned about use of
# I# R$ o( T- D# K2 d0 S- Vany ointment/creams that they may have applied to5 ^6 j7 B8 D/ u6 U0 e
the child’s skin. This time the father admitted the
# e/ m) u) D. z% z2 nTopical Testosterone Exposure / Bhowmick et al 541
- x* Y$ b8 \. R3 \ @( d* x- q) fuse of testosterone gel twice daily that he was apply-. r8 R0 A# B3 L, @
ing over his own shoulders, chest, and back area for
. Z4 X* a2 d+ D; b0 _a year. The father also revealed he was embarrassed
& c/ {4 L! H% F* oto disclose that he was using a testosterone gel pre-
/ Z! n6 s T; d$ u. Y" R0 Uscribed by his family physician for decreased libido$ a- d0 u6 k* |1 A& l; _( A2 U6 ~5 A
secondary to depression.1 J2 L0 h( i( c
The child slept in the same bed with parents.8 J; }* L. N9 H* q0 A: b$ Y
The father would hug the baby and hold him on his
7 ]. Q; t, y8 `! J3 `7 X" Tchest for a considerable period of time, causing sig-
+ N2 E+ x, `' p; hnificant bare skin contact between baby and father.
4 n3 Z6 ]6 Q! N- iThe father also admitted that after the phone call,
' s; N6 `0 ~3 U Bwhen he learned the testosterone level in the baby
, w0 C8 e p4 M& Dwas high, he then read the product information
: q$ J5 S8 ~% v2 w4 zpacket and concluded that it was most likely the rea-7 ]3 `: u% {! p3 } W& ?$ I. M' ~
son for the child’s virilization. At that time, they
+ M$ ^7 C) T! k- M8 j2 {9 P9 k- s* jdecided to put the baby in a separate bed, and the1 E1 B' @+ ?) A7 S( S, B6 P) {/ ]
father was not hugging him with bare skin and had4 c& D, P$ k+ Z3 g3 h# J+ X/ w
been using protective clothing. A repeat testosterone* I z5 R' y7 Q1 G
test was ordered, but the family did not go to the
( Y/ N# w" ^) H1 [+ ~5 l% e, Ulaboratory to obtain the test.
# v4 q* b1 n* `Discussion: d- |9 V: ~ W) R' v! ?6 Y; A1 m
Precocious puberty in boys is defined as secondary2 d) \9 ]5 O9 O+ p
sexual development before 9 years of age.1,4
6 _3 m0 j/ F8 q1 k# iPrecocious puberty is termed as central (true) when7 F" [0 V7 v$ S
it is caused by the premature activation of hypo-, n/ z) X4 W f, X( R* L: \
thalamic pituitary gonadal axis. CPP is more com-) R C, H) ?* @3 |* b( Z3 W% a
mon in girls than in boys.1,3 Most boys with CPP
{' y( r# O1 O3 b- j6 mmay have a central nervous system lesion that is+ v+ @" e9 E7 Q
responsible for the early activation of the hypothal-* s! s8 u' R3 N0 x k. C) H
amic pituitary gonadal axis.1-3 Thus, greater empha-( P% v/ x: \% W* w6 j
sis has been given to neuroradiologic imaging in. S& K- a# l& E
boys with precocious puberty. In addition to viril-! N: a; V7 l4 z
ization, the clinical hallmark of CPP is the symmet- H3 O; e2 f0 ~& }
rical testicular growth secondary to stimulation by' ^; @: I' k$ [, c
gonadotropins.1,3- g. G# R1 x; V7 V& D6 S5 @0 b
Gonadotropin-independent peripheral preco-
' G* Q3 r" t7 P& v2 V. J) L; acious puberty in boys also results from inappropriate
% U$ h/ S' ^0 C6 c2 {) g& Iandrogenic stimulation from either endogenous or
& b& D% [# p& h3 i) p! l1 Fexogenous sources, nonpituitary gonadotropin stim-0 i# f. n' {0 b4 [; `3 {/ V
ulation, and rare activating mutations.3 Virilizing- U& u' l( r1 ]
congenital adrenal hyperplasia producing excessive
3 B" u3 B. e# V# v$ F& {0 e1 Qadrenal androgens is a common cause of precocious) M; q$ O2 t+ g( [6 r9 b
puberty in boys.3,4
% S4 D, W3 G/ SThe most common form of congenital adrenal
9 h7 o- U" q4 a, ~( Q( M. J0 qhyperplasia is the 21-hydroxylase enzyme deficiency.
1 f4 H: a0 W- xThe 11-β hydroxylase deficiency may also result in# A# ?4 O( j! [- u3 g
excessive adrenal androgen production, and rarely,+ S R; G9 e! C9 _. y' @+ k
an adrenal tumor may also cause adrenal androgen
% i& W# s+ K# vexcess.1,3
- |/ b4 F6 _8 S; R! _8 f; y& Gat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from- U* k& z0 W* \1 E, `
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
1 l1 ~/ S# j" ~# i* S/ V8 I, w rA unique entity of male-limited gonadotropin-
- S# v# L4 H C% j, d' j4 Windependent precocious puberty, which is also known8 h' e- |2 w# d6 |/ j# Q; @7 j
as testotoxicosis, may cause precocious puberty at a7 ?7 I p6 I7 F9 O( r
very young age. The physical findings in these boys
" ?- Y$ l6 z1 e; @' Zwith this disorder are full pubertal development,5 k5 J C( M- i+ {6 P; Y
including bilateral testicular growth, similar to boys
7 t& q9 O: R1 A% w3 Q9 [% }+ Kwith CPP. The gonadotropin levels in this disorder/ q1 y2 ~: e# ~
are suppressed to prepubertal levels and do not show( v4 D' x, w+ A+ K4 t4 Z
pubertal response of gonadotropin after gonadotropin-
7 a, v/ v( }( `releasing hormone stimulation. This is a sex-linked' D8 @7 D: }/ O S; q7 Q" e% V
autosomal dominant disorder that affects only
( S; J. z% P* pmales; therefore, other male members of the family
& \ y+ o: U+ Ymay have similar precocious puberty.3% ^* U3 n/ @( S2 _
In our patient, physical examination was incon-
7 {: Q, I1 p; ] Wsistent with true precocious puberty since his testi-
) D2 Q* ~$ m. \' N' X( rcles were prepubertal in size. However, testotoxicosis
6 e) M/ ~$ W7 I6 \was in the differential diagnosis because his father# F/ j9 l; @! B/ e
started puberty somewhat early, and occasionally,: g2 s: n! x, b! _% ]% G/ u
testicular enlargement is not that evident in the
( C- K( o1 D4 H. R' @9 lbeginning of this process.1 In the absence of a neg-
2 w& o5 h3 z) j* s1 {7 X* aative initial history of androgen exposure, our
1 d4 _" c; N8 E' n6 }biggest concern was virilizing adrenal hyperplasia,0 p: P/ E0 J) l) v4 c
either 21-hydroxylase deficiency or 11-β hydroxylase8 T* R% F% p; m1 m4 r9 Q
deficiency. Those diagnoses were excluded by find-) J F% p ?, ~: l5 W( U# a+ |6 G
ing the normal level of adrenal steroids.
: M2 c; U2 N7 ^$ b. CThe diagnosis of exogenous androgens was strongly' s/ k7 O! X* Q: b& G5 ]! Y
suspected in a follow-up visit after 4 months because9 b3 n8 L+ }. S. C- _: e' D
the physical examination revealed the complete disap-
" l9 R o$ W" d) y; {0 q% rpearance of pubic hair, normal growth velocity, and0 W5 A9 Q( ?( E% P+ z
decreased erections. The father admitted using a testos-
& ^" j* f( q: b+ W$ Uterone gel, which he concealed at first visit. He was
) |5 t q$ E- Y" j0 O( t! Y% ?using it rather frequently, twice a day. The Physicians’. t. e9 m# H! b
Desk Reference, or package insert of this product, gel or) c0 S4 v) N$ G( L: C8 v
cream, cautions about dermal testosterone transfer to- q4 H( h% F/ b% L( s* k6 [7 ]
unprotected females through direct skin exposure.' U' M5 J* h9 G1 R z% r5 j
Serum testosterone level was found to be 2 times the
$ ^0 L7 U0 i2 E- n, p+ Gbaseline value in those females who were exposed to
4 ? n# c* n/ G" {" aeven 15 minutes of direct skin contact with their male8 r9 M1 `" C |
partners.6 However, when a shirt covered the applica-8 \1 R/ Z4 V) g4 K. b# I
tion site, this testosterone transfer was prevented.
$ O4 O2 ?# C3 b# XOur patient’s testosterone level was 60 ng/mL,6 f- h! \' v4 N0 X
which was clearly high. Some studies suggest that
, P& Q* h% |6 l% S, j- e* Wdermal conversion of testosterone to dihydrotestos-, R# Z( L- v$ M" P; S2 \
terone, which is a more potent metabolite, is more
9 V' v! H4 G. J& }active in young children exposed to testosterone
2 i( t; O6 K; n1 y+ j) Lexogenously7; however, we did not measure a dihy-
; z4 P0 Z$ a$ A' \! B# O/ ddrotestosterone level in our patient. In addition to$ \7 H$ o/ O0 \; o' ^" }8 Q
virilization, exposure to exogenous testosterone in2 l3 S4 m2 L$ R& W6 M3 n
children results in an increase in growth velocity and! l/ o8 y- R$ J' n- t+ t
advanced bone age, as seen in our patient.
9 W1 E8 F" C& O" Z3 XThe long-term effect of androgen exposure during, S* g- n% D1 v I
early childhood on pubertal development and final
* A1 J! e' T# ]8 U; a& gadult height are not fully known and always remain
0 O: p4 o( e; r3 Z! s0 q) ga concern. Children treated with short-term testos-" j) B7 d8 ?1 j" f
terone injection or topical androgen may exhibit some8 q6 y) `7 c' r* o6 U& d
acceleration of the skeletal maturation; however, after
5 B; @ s4 s: A: Q# w V8 Q4 vcessation of treatment, the rate of bone maturation) |3 [$ ^$ I( B0 ^; I
decelerates and gradually returns to normal.8,9
$ f5 ~/ f; g3 L) a1 FThere are conflicting reports and controversy
# F, J$ _* K; k5 ?over the effect of early androgen exposure on adult
0 J+ n) H1 b8 e, O' ?# |penile length.10,11 Some reports suggest subnormal
7 H* A: D! Q1 Q9 Iadult penile length, apparently because of downreg-
6 z9 B6 J3 n9 k4 xulation of androgen receptor number.10,12 However,
3 y5 b3 g% A( o. c B2 V& @8 g j; l- LSutherland et al13 did not find a correlation between
) V& t& [) }3 z- L# n' Y5 x, xchildhood testosterone exposure and reduced adult
' V) }$ s. q* N% Y9 ~! K# u* [penile length in clinical studies.5 V" U+ ?8 V) \2 Y! L
Nonetheless, we do not believe our patient is, c0 X! X( i i) C
going to experience any of the untoward effects from! e0 N$ M6 r" d0 D8 K# W" {- c4 ?
testosterone exposure as mentioned earlier because
) @0 d3 T- ?( X* P9 p% q1 ] jthe exposure was not for a prolonged period of time.
9 D0 B* y0 ]6 o4 i( }* |Although the bone age was advanced at the time of% a; |9 y, m6 W! j4 }. |
diagnosis, the child had a normal growth velocity at# I. y% z) C9 \7 q: @6 M$ x
the follow-up visit. It is hoped that his final adult
8 V+ [+ Q6 f0 p6 Mheight will not be affected.
/ G2 a4 y& p/ w6 a3 Z% W4 V4 oAlthough rarely reported, the widespread avail-- l* C5 X, [' ]( d* V3 y
ability of androgen products in our society may7 ~$ { T) T5 M
indeed cause more virilization in male or female
! R+ I. W9 S' e( G& w+ E! N# Hchildren than one would realize. Exposure to andro-, u% y8 b% @4 A
gen products must be considered and specific ques-
" `4 J/ \/ w3 L8 rtioning about the use of a testosterone product or
$ i& G1 }9 R* g- Wgel should be asked of the family members during" b4 C/ n8 O. k% G5 \& p" j
the evaluation of any children who present with vir-
& X V) Q/ M0 B2 j, Rilization or peripheral precocious puberty. The diag-+ b2 @3 J7 q- q' K% S
nosis can be established by just a few tests and by
/ y) p* A9 B0 w* @. M6 @7 xappropriate history. The inability to obtain such a& y% u* N" |% r) N( |8 o( E
history, or failure to ask the specific questions, may
/ e1 C( f; q- G$ g& j. F+ iresult in extensive, unnecessary, and expensive
* O! i: X( v7 T& N* a1 tinvestigation. The primary care physician should be. D+ b' Z5 g& c7 C+ @; H6 h
aware of this fact, because most of these children
0 y: Y) |- J4 p1 M* e* r! m- Wmay initially present in their practice. The Physicians’: o7 L2 D. u& v; E, C) [
Desk Reference and package insert should also put a& r9 y* `+ N9 b
warning about the virilizing effect on a male or
7 k" S* C' S- e8 r( wfemale child who might come in contact with some-5 k+ T. G1 N i" y4 v+ O
one using any of these products.
# V; W3 S* G6 U2 ~* uReferences
, V: U8 J# ^: j; Q1. Styne DM. The testes: disorder of sexual differentiation
1 _5 V- g8 c$ P$ k+ N& n, B' yand puberty in the male. In: Sperling MA, ed. Pediatric; ^1 n) {- g, v5 d. I& w2 g
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;1 ~) @8 E; L( }
2002: 565-628.
6 t# {! g- ]: Q2 a2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
4 [1 t( X8 ^- U3 E' ^puberty in children with tumours of the suprasellar pineal
4 ?8 V2 \: O) a3 ?at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
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3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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Dekker Inc; 2003:211-238.. f ]' Z! K6 h' Q/ x
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
4 h' ^& M0 D! c. A$ W R0 p. w; |, L* `development in a two-year-old boy induced by topical3 @3 C3 `# c1 s# W
exposure to testosterone. Pediatrics. 1999;104:e23.
, J4 b1 U7 B! ]9 M3 D! i5. Greulich WW, Pyle SI, eds. Radiographic Atlas of2 i! I# `' O! i. X5 Z( q) Z* z2 `3 Y- D
Skeletal Development of the Hand and Wrist. 2nd ed.
& ~% h& @- N Z2 sStanford, CA: Stanford University Press; 1959.
6 n% ]; V. e8 b* S3 T6. Physicians’ Desk Reference. Androgel 1% testosterone,
7 s- Q9 U: E- T2 z) D1 O# @6 X+ _Unimed Pharmaceutical Inc. Montvale, NJ: Medical
3 d i( y: W4 w- R& l3 s' oEconomics Company, Inc; 2004:3239-3241.+ l7 ~1 i8 g9 [$ @
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