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is a significant concern for physicians. Central8 r' f# g5 |& ^2 M* l6 e
precocious puberty (CPP), which is mediated
# F9 O2 j8 f5 g+ V' K8 j+ ~, Uthrough the hypothalamic pituitary gonadal axis, has! m l; ?) f- ~" _1 `0 [$ N
a higher incidence of organic central nervous system
' h! d, J2 G2 l& ? V& m: Flesions in boys.1,2 Virilization in boys, as manifested2 A2 E/ i& g" P' Z6 D# U# I
by enlargement of the penis, development of pubic
5 `. w6 k F& {6 Chair, and facial acne without enlargement of testi-
& L! x) l$ h* i4 pcles, suggests peripheral or pseudopuberty.1-3 We- u/ u' C5 Q5 i( I2 W$ t: i
report a 16-month-old boy who presented with the
. K6 N9 @- j8 Xenlargement of the phallus and pubic hair develop-0 X2 V. A& {# Z5 A! d7 b/ p: t9 R/ @
ment without testicular enlargement, which was due3 ^: L0 s0 i# b; Y% r \
to the unintentional exposure to androgen gel used by
4 l- S. u/ j( U. j; @( dthe father. The family initially concealed this infor- I/ i/ M# s: Q; |
mation, resulting in an extensive work-up for this
9 x5 Z. |+ M- ]8 h* I6 h/ _. }' dchild. Given the widespread and easy availability of: n7 R) ?6 A8 z/ K
testosterone gel and cream, we believe this is proba-
) q. w) ^" p: E6 H& k' Mbly more common than the rare case report in the
+ G4 d* k9 d% p% Lliterature.49 g* C! @$ s2 l6 T5 @ E
Patient Report8 r! z1 w# i' A) z
A 16-month-old white child was referred to the$ C. s4 _" ~: z' ~( U
endocrine clinic by his pediatrician with the concern* G. z$ h" C) Y" A; ?. m9 ?" U3 Y
of early sexual development. His mother noticed
/ |+ S9 s2 v8 ^light colored pubic hair development when he was
M2 O* x }. h0 sFrom the 1Division of Pediatric Endocrinology, 2University of: @6 Y/ S d) Y8 ]
South Alabama Medical Center, Mobile, Alabama.9 ?7 A; H5 v. R" K! r: N
Address correspondence to: Samar K. Bhowmick, MD, FACE,4 R% P# W, v9 e8 ]' ~
Professor of Pediatrics, University of South Alabama, College of) c; G4 b& _5 M2 \3 O. W
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;' Q, U& _! o, x+ @7 ~4 Y
e-mail: [email protected].! N' @7 a9 K- c; S' z6 E
about 6 to 7 months old, which progressively became: E/ d/ u$ m6 }7 a
darker. She was also concerned about the enlarge-
, s3 P! t- M; S0 ~2 g# F) bment of his penis and frequent erections. The child$ w3 E, s0 G6 D
was the product of a full-term normal delivery, with
* `. A( u+ h& O( aa birth weight of 7 lb 14 oz, and birth length of6 I9 ?7 ?/ w: F5 b* [
20 inches. He was breast-fed throughout the first year+ D% F9 H# L# ?. K. r
of life and was still receiving breast milk along with
5 r9 k# ?# l2 u% @5 H2 }/ M$ I, rsolid food. He had no hospitalizations or surgery,! X$ e+ K# R& h0 G
and his psychosocial and psychomotor development
, j% ^% [) n3 S ~4 @- Awas age appropriate.
v0 o- g& ^/ X s h4 RThe family history was remarkable for the father,8 g; _* f1 d- O- T0 P( D
who was diagnosed with hypothyroidism at age 16,
' Z3 c4 X: X5 y6 m- `, ]which was treated with thyroxine. The father’s
+ |/ n; q8 W. C( ?: j/ @1 rheight was 6 feet, and he went through a somewhat+ y* D6 F9 l, ^, K' M7 t
early puberty and had stopped growing by age 14.
; U6 z- A7 G% U9 I2 m+ o" c1 PThe father denied taking any other medication. The
" W' f3 o, z/ v) P# uchild’s mother was in good health. Her menarche0 N" q% [: p! O) ^3 l
was at 11 years of age, and her height was at 5 feet! r J# z0 N: ]: ?
5 inches. There was no other family history of pre-
; d. e# ]3 L: y$ {! H$ Lcocious sexual development in the first-degree rela-+ J3 k' @9 K \, c
tives. There were no siblings.+ ?/ |1 `3 t* l3 o& N) F
Physical Examination
, u* f: T0 P9 y& E/ A9 x1 J F" s3 IThe physical examination revealed a very active,5 `) a) d& C; l" G7 l1 t+ L+ W! @
playful, and healthy boy. The vital signs documented
$ K( J: @! e4 p3 s- H! La blood pressure of 85/50 mm Hg, his length was9 d% S& T4 P. l+ g4 m8 i* J
90 cm (>97th percentile), and his weight was 14.4 kg9 @7 U* _- N' X
(also >97th percentile). The observed yearly growth
: _/ ^; r+ Q* F; h! l( i# jvelocity was 30 cm (12 inches). The examination of9 T, l2 y8 F* y9 j$ T
the neck revealed no thyroid enlargement.$ F5 c* u2 i* z; o; j; Y
The genitourinary examination was remarkable for
5 F9 q: y" @& ~$ `+ renlargement of the penis, with a stretched length of
$ J1 [6 W F6 @! d: S+ Y. B8 cm and a width of 2 cm. The glans penis was very well
# }2 ^, w3 d2 y8 @; L# r5 e3 Mdeveloped. The pubic hair was Tanner II, mostly around7 g4 M, M4 {' g2 F1 k# e+ @1 O- F
5403 r4 P$ \+ i9 x- F5 v# Z' l8 Y
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from5 F+ I5 B; E$ {
the base of the phallus and was dark and curled. The! j, P! ]- T4 k
testicular volume was prepubertal at 2 mL each.& @. S# t8 Z9 _. W; I
The skin was moist and smooth and somewhat6 m) i6 j. r8 c8 G4 A
oily. No axillary hair was noted. There were no
, k7 t4 k1 t2 x/ {$ e) kabnormal skin pigmentations or café-au-lait spots./ \ S b0 c! D/ k7 U2 M" O+ Z! C2 c
Neurologic evaluation showed deep tendon reflex 2+8 }1 V/ C+ d* T7 I
bilateral and symmetrical. There was no suggestion5 ^/ {( e$ Z% H( R6 H, B' D+ v* |
of papilledema.
$ h, J: F% h% ?; _. n YLaboratory Evaluation+ M' l3 p- [2 c
The bone age was consistent with 28 months by
$ t$ T# l: E: C+ s C5 }4 e& R' tusing the standard of Greulich and Pyle at a chrono-
+ G: |% |# Q0 d qlogic age of 16 months (advanced).5 Chromosomal: d) R; V0 E& P: r2 r: g1 X
karyotype was 46XY. The thyroid function test
9 R: Q) {& C$ T* x) G6 ashowed a free T4 of 1.69 ng/dL, and thyroid stimu-8 j' X- L- S3 v' {5 j
lating hormone level was 1.3 µIU/mL (both normal).4 F* x" a7 x* K8 l' k( s! S$ W
The concentrations of serum electrolytes, blood& s, @# a9 q" M
urea nitrogen, creatinine, and calcium all were
. \. \& |- O' Twithin normal range for his age. The concentration
, Z" o( [0 V; Q$ Q' R7 [% G6 p* aof serum 17-hydroxyprogesterone was 16 ng/dL
: @6 Y1 e6 I. I; j6 G3 b(normal, 3 to 90 ng/dL), androstenedione was 20( [0 `% [ O8 u1 M) K
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-" B$ a3 I8 s+ a
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
) C$ Z6 b2 }8 G Gdesoxycorticosterone was 4.3 ng/dL (normal, 7 to) c, o; u$ D C1 y) X9 g" _9 S/ D
49ng/dL), 11-desoxycortisol (specific compound S)
1 S0 `0 Y \0 j! f5 s4 }9 ewas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-: X, f3 r" x- R- ^" b
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
0 g/ ~4 B7 a( ~7 f+ \testosterone was 60 ng/dL (normal <3 to 10 ng/dL),9 v+ v `% Z6 r3 {9 f3 I W7 L
and β-human chorionic gonadotropin was less than+ ^0 O+ u. ]5 j2 P5 z
5 mIU/mL (normal <5 mIU/mL). Serum follicular
: Q; Z& s/ V: f3 L; e) V' c7 V- Sstimulating hormone and leuteinizing hormone" C: ~( B, i- s0 c- K
concentrations were less than 0.05 mIU/mL
/ k B& b2 |- D4 S4 F5 R(prepubertal).
9 s6 i' |0 r1 b& _0 o' S3 JThe parents were notified about the laboratory
+ q$ x7 _6 U! N& m' [results and were informed that all of the tests were: \' Z: D1 H. X) w0 T' q! \
normal except the testosterone level was high. The
3 K8 }+ S% U0 H4 z" Q: mfollow-up visit was arranged within a few weeks to+ [( z: q5 N3 O7 C5 h4 U
obtain testicular and abdominal sonograms; how-' t. F7 e2 G+ j+ _
ever, the family did not return for 4 months.
' i6 k' m3 N4 C# x5 HPhysical examination at this time revealed that the
: z2 x2 d& o8 q$ fchild had grown 2.5 cm in 4 months and had gained
# m: P* i2 C2 z5 v5 S" V2 kg of weight. Physical examination remained
2 J/ Q, u- P6 y$ {6 Q! T5 a _: G# tunchanged. Surprisingly, the pubic hair almost com-8 _' @& z) c' x6 ?0 G
pletely disappeared except for a few vellous hairs at9 t3 s5 {8 W+ d) X. s& K. N
the base of the phallus. Testicular volume was still 2$ }2 ]6 {1 {" I' r
mL, and the size of the penis remained unchanged.# I2 n9 r" k! }8 g9 G+ H9 _( K
The mother also said that the boy was no longer hav-
, K" t1 l, s8 ming frequent erections.
( f2 Z5 |3 U- D/ BBoth parents were again questioned about use of
7 ?0 A8 o& S9 x2 j2 Qany ointment/creams that they may have applied to7 }4 g' x: H; I2 `: Z1 T
the child’s skin. This time the father admitted the
8 g/ p5 @( e4 U4 H) Q* y- ^ @ tTopical Testosterone Exposure / Bhowmick et al 541
9 ^ M& k! y5 c% M Tuse of testosterone gel twice daily that he was apply-
3 ~# b# {$ _8 b/ Iing over his own shoulders, chest, and back area for
" X6 V6 c) z. A* b4 P3 ka year. The father also revealed he was embarrassed
* A* m6 m; p" l; A3 gto disclose that he was using a testosterone gel pre-
+ U( D# w& L) H/ G/ Y7 Nscribed by his family physician for decreased libido, Y! c3 n: D7 L% L
secondary to depression.# w' O3 A m) |
The child slept in the same bed with parents.0 ]+ u6 R$ {! t
The father would hug the baby and hold him on his
" s, b& V9 o2 o* L- |chest for a considerable period of time, causing sig-
- ?& X- ?* A# W4 @nificant bare skin contact between baby and father.
: v& N& B* O; Y7 u" SThe father also admitted that after the phone call,- K% r) S/ H% B) [: Y7 z+ m3 I% X
when he learned the testosterone level in the baby6 ?8 d r6 C( s0 q( d; l
was high, he then read the product information
6 [! O+ ^: ^0 u* e( Tpacket and concluded that it was most likely the rea-
$ d: k& y, M$ c% [& ]% mson for the child’s virilization. At that time, they
; _+ Q( n$ S. V+ b, x+ Pdecided to put the baby in a separate bed, and the
?; |/ s3 M( k% c! ] ufather was not hugging him with bare skin and had0 ~; { [0 B: c6 v- I, z
been using protective clothing. A repeat testosterone
& G0 m6 J; x! h$ q/ h6 N0 Qtest was ordered, but the family did not go to the
1 F+ l( R2 w, y5 W. b9 f, Llaboratory to obtain the test.
* R' V# w: T c7 W* M# uDiscussion* J' U) j/ v/ v" K
Precocious puberty in boys is defined as secondary
/ w! E' A8 b9 U% Csexual development before 9 years of age.1,4
- o" ?1 X! ]4 A8 iPrecocious puberty is termed as central (true) when* R3 X! i/ w1 n8 |2 ^+ f( M) i2 \: U
it is caused by the premature activation of hypo-
4 U! p( J O/ ]4 uthalamic pituitary gonadal axis. CPP is more com-; j. N" D6 b( e! X) c5 R8 [0 K
mon in girls than in boys.1,3 Most boys with CPP
$ g9 P- T$ A9 S9 M; Lmay have a central nervous system lesion that is) t0 O* s7 n: K) n! |. F
responsible for the early activation of the hypothal-
# j& t; I/ ?$ U* e6 `$ \amic pituitary gonadal axis.1-3 Thus, greater empha-
# X' p! E( C# E1 J. M {sis has been given to neuroradiologic imaging in
& g$ }2 r- T7 p: W2 H: y6 _boys with precocious puberty. In addition to viril-7 ~% `# A- p/ m4 M
ization, the clinical hallmark of CPP is the symmet-7 L: m [8 |) p; B# C
rical testicular growth secondary to stimulation by
: d6 p& [2 [ [* n* f: cgonadotropins.1,3
1 J H3 F K1 gGonadotropin-independent peripheral preco-
0 j, G* g; R6 Z+ Gcious puberty in boys also results from inappropriate
h- g) O5 v3 _& {9 J6 J; handrogenic stimulation from either endogenous or
- m8 [7 e9 t" texogenous sources, nonpituitary gonadotropin stim-& E5 Y0 R9 |' ]% k4 y8 ~
ulation, and rare activating mutations.3 Virilizing
5 M+ X$ w$ ] i# Z# A) M6 @congenital adrenal hyperplasia producing excessive
( L0 M/ t* {* zadrenal androgens is a common cause of precocious
8 t E/ }0 ^0 y8 r' g2 ypuberty in boys.3,4
, t5 |+ Q9 e/ o# w: {The most common form of congenital adrenal
$ ~: N5 S, x! C3 t1 p7 uhyperplasia is the 21-hydroxylase enzyme deficiency.
9 D% R6 _" a y1 ]The 11-β hydroxylase deficiency may also result in
( g e) u; C! t& ^$ wexcessive adrenal androgen production, and rarely,
7 v) z5 ]2 `6 p0 U6 Han adrenal tumor may also cause adrenal androgen
9 F' ~6 @/ A" P9 q3 g. S% eexcess.1,3
$ d0 d" `, k' }+ {- _# ^7 S# Sat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% R8 r8 Q* A: J* z; J$ g- T7 |
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007! _6 n: E* l4 j7 s I3 \4 D
A unique entity of male-limited gonadotropin-% F$ M- b* E2 [1 Q
independent precocious puberty, which is also known( S" E( W1 s0 z6 I
as testotoxicosis, may cause precocious puberty at a
0 Z( B% M* m6 {' U2 Z1 f, tvery young age. The physical findings in these boys
: G& s0 `7 I: P( J& I% |6 Hwith this disorder are full pubertal development," g- L; B: A6 {; f) w
including bilateral testicular growth, similar to boys
$ X: @8 l }. X \+ m6 M; Y: r3 Mwith CPP. The gonadotropin levels in this disorder
8 Y# W! p7 P) B; \% M8 K) ~are suppressed to prepubertal levels and do not show
& D( f6 k4 t( p+ I N, Cpubertal response of gonadotropin after gonadotropin-" T$ L0 v1 @6 i3 e* Y3 Y/ q
releasing hormone stimulation. This is a sex-linked
: S0 ?( Z5 M8 F. c; e2 nautosomal dominant disorder that affects only
2 l% p8 b* P& Zmales; therefore, other male members of the family" B% z6 i) a+ d1 i* Y
may have similar precocious puberty.30 ~3 F. V/ I6 L9 d/ b" B% V
In our patient, physical examination was incon-
, |, K* B! D# B: @; U& asistent with true precocious puberty since his testi-
/ N" }& s2 U0 I8 \; K- S) Pcles were prepubertal in size. However, testotoxicosis1 i9 V l( c- m3 L, e0 l
was in the differential diagnosis because his father
- H4 _# X0 A8 | G6 @2 r- r6 `; Lstarted puberty somewhat early, and occasionally,
8 F) }$ E! F2 k& |3 Ptesticular enlargement is not that evident in the0 m- J/ o. [* t2 A
beginning of this process.1 In the absence of a neg-
& s) p# q: Y/ B& `8 p- r+ wative initial history of androgen exposure, our/ P, e1 u! Y( {' _" P
biggest concern was virilizing adrenal hyperplasia,
/ k# ?# f/ `6 i" }2 ~5 J) U% B: i& Leither 21-hydroxylase deficiency or 11-β hydroxylase
+ c. ]9 s" X# n+ y+ adeficiency. Those diagnoses were excluded by find-
/ m: Q) L3 ]. V1 d2 O( ying the normal level of adrenal steroids.3 P/ a+ n4 L6 \! c# T
The diagnosis of exogenous androgens was strongly% c7 H8 y- z; {+ j" D
suspected in a follow-up visit after 4 months because$ F& O% ]" _( Z/ Q' N. Y3 s
the physical examination revealed the complete disap-# ]. t6 o2 j1 G, h5 j; ^# @
pearance of pubic hair, normal growth velocity, and: ?. V! Z) [4 V8 g; M/ I9 q0 k8 o
decreased erections. The father admitted using a testos-
" h, I) y. m1 b9 Hterone gel, which he concealed at first visit. He was- ~4 H q& @, C: y8 B
using it rather frequently, twice a day. The Physicians’
/ U) {3 O. G3 w4 C; H% k; a6 }5 bDesk Reference, or package insert of this product, gel or
+ T' [) p8 ^3 n7 [1 k2 Acream, cautions about dermal testosterone transfer to
4 }( N/ k1 c6 p9 _ I2 Gunprotected females through direct skin exposure.9 }, F E. R; \& ~
Serum testosterone level was found to be 2 times the
7 y% `( B4 `/ U! jbaseline value in those females who were exposed to
8 |3 B1 A+ E+ e4 {4 j) E5 yeven 15 minutes of direct skin contact with their male9 Y! D$ a( X8 L. u& p6 ^
partners.6 However, when a shirt covered the applica-
, n4 M. U; W q9 y: q1 s$ D, F- P3 Ftion site, this testosterone transfer was prevented., C6 [+ T: J5 D. I( u4 w
Our patient’s testosterone level was 60 ng/mL,4 n% \/ p2 }( X0 Z. {* K
which was clearly high. Some studies suggest that
* Q+ K5 D$ ]. d' U/ hdermal conversion of testosterone to dihydrotestos-
# u/ d3 f( X0 S) mterone, which is a more potent metabolite, is more) E+ h- L; J; y' l* E
active in young children exposed to testosterone! S- @& r: Q8 Q4 J: N
exogenously7; however, we did not measure a dihy-* k) n* ?# s+ r. E T' N+ R3 _; I5 o
drotestosterone level in our patient. In addition to. f$ C3 X* B% H3 I
virilization, exposure to exogenous testosterone in
- X" U: ^0 b; ^; W4 f9 Qchildren results in an increase in growth velocity and
2 a4 M0 s5 w7 w' Kadvanced bone age, as seen in our patient.
& \5 C; T2 `9 W: s. ?8 |The long-term effect of androgen exposure during
" E& p; U3 g: U5 rearly childhood on pubertal development and final0 I0 x i1 J+ o0 u1 z
adult height are not fully known and always remain$ f6 s. h5 n. U7 L2 c
a concern. Children treated with short-term testos-4 ]0 U: |' l2 I# M8 v
terone injection or topical androgen may exhibit some
) H; Q% D2 x2 aacceleration of the skeletal maturation; however, after" F0 s! _0 K8 P" U
cessation of treatment, the rate of bone maturation! K7 g' m! |# E& g( v( n/ h" t
decelerates and gradually returns to normal.8,9' R; }! ~1 l# v- b' p
There are conflicting reports and controversy9 L& U* N4 v9 g8 V3 r( B
over the effect of early androgen exposure on adult( i3 Q9 @. _* l/ O
penile length.10,11 Some reports suggest subnormal" N- ]3 b4 B _1 h, J
adult penile length, apparently because of downreg-/ V1 |8 h/ o' C$ t- W& j6 t
ulation of androgen receptor number.10,12 However,
. w% F" H" `7 F0 _1 z; C# R4 zSutherland et al13 did not find a correlation between
: z" e) q4 s' K7 @childhood testosterone exposure and reduced adult
3 y, X( m% K" ^penile length in clinical studies.3 ~7 @6 P7 F5 }9 {( c! M) J
Nonetheless, we do not believe our patient is
) w- e0 z$ i) hgoing to experience any of the untoward effects from
+ d! ~3 t" E$ Atestosterone exposure as mentioned earlier because
4 \% A! v G$ H: f8 bthe exposure was not for a prolonged period of time.
; j4 w- g) K! rAlthough the bone age was advanced at the time of
7 _: J a+ J& W! X( k6 odiagnosis, the child had a normal growth velocity at: W0 s, u* {1 M& D. F
the follow-up visit. It is hoped that his final adult
! ~: t0 J2 X- e1 g- vheight will not be affected.7 ]( K d0 H- T; m
Although rarely reported, the widespread avail-
, r# J/ Y% u# |& Kability of androgen products in our society may
3 c" v3 o5 i9 Findeed cause more virilization in male or female" s1 N) X1 h: @1 I0 P3 E4 ~
children than one would realize. Exposure to andro-3 q0 k: i/ B; K* I, z! E
gen products must be considered and specific ques-
6 B: T3 n2 P% r2 s. A8 H; `tioning about the use of a testosterone product or/ M/ U0 h5 i8 C
gel should be asked of the family members during" F9 p1 \ j- |
the evaluation of any children who present with vir-
% e" w8 g" u* \/ a- Cilization or peripheral precocious puberty. The diag-4 i9 W# q% _$ v! x) f
nosis can be established by just a few tests and by5 y N+ p j4 b2 I" k+ y( |
appropriate history. The inability to obtain such a+ \& T' t1 l: v7 l: c! T
history, or failure to ask the specific questions, may
8 s7 q( e K) {' D* M2 F0 hresult in extensive, unnecessary, and expensive
! X4 u. f: I! K9 Tinvestigation. The primary care physician should be* F6 k/ U( q& e0 B) T- Z/ @5 N+ d1 S* Z
aware of this fact, because most of these children
0 \2 E9 R+ g6 bmay initially present in their practice. The Physicians’
" d+ z" M& M$ fDesk Reference and package insert should also put a0 q" u2 M/ I# j5 R
warning about the virilizing effect on a male or
1 F- ]1 C, H" V- Y: Gfemale child who might come in contact with some-. j: T( l8 c0 Q; k/ G; d
one using any of these products.3 I1 O) y+ E: z& n) F. f
References
1 V8 j6 I {) g: @! c1. Styne DM. The testes: disorder of sexual differentiation
3 B7 ?. I# R. o9 S! m8 Kand puberty in the male. In: Sperling MA, ed. Pediatric# C3 Z: r8 D: b% q5 P- q
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;2 C, B1 K5 ~3 }4 H6 I2 K' ~9 k
2002: 565-628.& I. Z: L' Z- Y! D/ U5 l5 q1 C
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
2 {$ S& r$ u4 Z6 |% A7 L1 N! J% \puberty in children with tumours of the suprasellar pineal
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' p4 e# s& _* a0 l: B5 ]/ N+ v% hTopical Testosterone Exposure / Bhowmick et al 543
) p7 w# o0 M& \( Z. `8 o \( q9 U+ xareas: organic central precocious puberty. Acta Paediatr. _3 I, P8 ]* V" p" r- T& O
2001;90:751-756.+ P7 n, d9 B. F9 u* O, r/ z
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
0 e1 }3 S9 @2 T h. `# g# SPediatric Endocrinology. 4th ed. New York, NY: Marcel! O& T* b7 G( s' Z6 [1 i- j
Dekker Inc; 2003:211-238.
& Q& R# P4 |3 C& ^" j0 j# Z# Z8 K$ h4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual4 j/ Z x; P& H$ b7 X
development in a two-year-old boy induced by topical/ P4 p' g9 R/ F8 P
exposure to testosterone. Pediatrics. 1999;104:e23.
+ }- M4 j1 [4 C5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
) l# F* }) X" B, H) i1 H( cSkeletal Development of the Hand and Wrist. 2nd ed.+ @+ ?7 H9 _1 t% f! G' U0 n
Stanford, CA: Stanford University Press; 1959.+ g1 R% r+ X8 \8 Y9 z( B# ]
6. Physicians’ Desk Reference. Androgel 1% testosterone,
$ y2 v3 C4 Z- V# FUnimed Pharmaceutical Inc. Montvale, NJ: Medical5 X! M: R8 X, q: n) Z* v
Economics Company, Inc; 2004:3239-3241.
1 c" c- Q9 Z2 @2 q0 L: E6 [7. Klugo RC, Cerny JC. Response of micropenis to topical
# A& h, L" u: \& f4 N9 k; _testosterone and gonadotropin. J Urol. 1978;119:7 i1 b- T; Q( v7 u5 k4 h
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