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is a significant concern for physicians. Central% j. N0 t5 l% g4 m& n# ^
precocious puberty (CPP), which is mediated
/ \- I3 v _5 ]; _through the hypothalamic pituitary gonadal axis, has
! c) t- T; d5 Z( z- Y/ ma higher incidence of organic central nervous system
& J+ |# T( p0 j! g! W! ]lesions in boys.1,2 Virilization in boys, as manifested
+ j- h8 u' G# R% I: b0 N1 n3 v$ rby enlargement of the penis, development of pubic
8 j8 B8 w9 J& \+ L P. H7 G8 ehair, and facial acne without enlargement of testi-# k# |( U3 X4 {6 {2 W7 V1 z
cles, suggests peripheral or pseudopuberty.1-3 We
# D" ~* Q+ ~+ Y1 freport a 16-month-old boy who presented with the
& D! I6 L- m# O. v) j& aenlargement of the phallus and pubic hair develop-9 ?9 S s6 T" B4 A3 C; T4 P# J
ment without testicular enlargement, which was due2 G# m. u/ s/ l( X4 X, N# I
to the unintentional exposure to androgen gel used by. h ~3 g) }5 U( T
the father. The family initially concealed this infor-
) ~- f+ J7 K) A* qmation, resulting in an extensive work-up for this
6 p( U! U/ n# a! jchild. Given the widespread and easy availability of
7 Y1 `5 ?# ?5 qtestosterone gel and cream, we believe this is proba-
, T0 S" g( m$ \* lbly more common than the rare case report in the: o9 M" c) B8 K; } f3 ?
literature.4
9 U( X) M0 P3 J6 s0 \Patient Report. g& p( ^) H; \2 s0 C
A 16-month-old white child was referred to the* i# P& q4 X7 w, d0 a- T- |
endocrine clinic by his pediatrician with the concern
% m2 ?$ r( ]9 uof early sexual development. His mother noticed- i! Y! Z |: b/ @$ G2 L, i+ w
light colored pubic hair development when he was' q. T2 w f v6 P9 ?+ U5 G
From the 1Division of Pediatric Endocrinology, 2University of" V% Y# ?7 C' B! [6 }
South Alabama Medical Center, Mobile, Alabama.
# e. @. v1 h- G# j- ~& K: LAddress correspondence to: Samar K. Bhowmick, MD, FACE,
1 q, {& i0 A: j. w% X( \Professor of Pediatrics, University of South Alabama, College of" e) X% F$ f9 f2 s$ z7 e
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
8 E3 f: P5 s3 V3 n* N ze-mail: [email protected].4 F/ d5 a S ~: S# T
about 6 to 7 months old, which progressively became
! [* z) w# y7 i( c: x2 _4 q$ ydarker. She was also concerned about the enlarge-: n( D/ C+ p+ G0 Q5 ^
ment of his penis and frequent erections. The child! I- I# U/ J6 ~% g+ ^
was the product of a full-term normal delivery, with( N0 Z N) l% C2 e; @/ p
a birth weight of 7 lb 14 oz, and birth length of
+ e/ V1 l' \/ s" c* S) }: [20 inches. He was breast-fed throughout the first year
& t+ h0 g7 ^% aof life and was still receiving breast milk along with1 }4 h. f' d% K7 ^5 D
solid food. He had no hospitalizations or surgery,
X& r7 }1 ^* N; A3 N ^& [% [and his psychosocial and psychomotor development/ m" N$ j# }8 \; x' D' k9 ?( E
was age appropriate.
8 ^$ k% O* x" |1 @The family history was remarkable for the father,
/ l2 f1 C+ C& J* D+ \" i/ A5 qwho was diagnosed with hypothyroidism at age 16,7 E, F3 o% B2 b6 O+ u
which was treated with thyroxine. The father’s* Z$ v0 N8 M$ N4 j! s
height was 6 feet, and he went through a somewhat
* U5 V% H4 u9 ]* s8 eearly puberty and had stopped growing by age 14.' M3 M" B4 d4 {
The father denied taking any other medication. The
* N9 o+ i( s- fchild’s mother was in good health. Her menarche
* b6 R& Y" S) ~0 C1 R4 C8 ewas at 11 years of age, and her height was at 5 feet
, r" T {& {4 ]* r5 inches. There was no other family history of pre-4 r) b9 U- w2 P& U- f0 c* q9 l! L
cocious sexual development in the first-degree rela-
- v1 h4 R9 R; M7 n3 t; Utives. There were no siblings.
7 T2 i/ T; r" I3 y6 d. S( B* TPhysical Examination
5 \& R* o* x* E2 A- fThe physical examination revealed a very active," m% B* }4 h8 A x
playful, and healthy boy. The vital signs documented
4 y1 y- {3 S6 H8 j/ C$ c5 Ga blood pressure of 85/50 mm Hg, his length was
5 @. t) c- k8 B" `1 q/ \0 F4 a90 cm (>97th percentile), and his weight was 14.4 kg% d& m2 y; n* x" W6 [. s
(also >97th percentile). The observed yearly growth- t) K4 s* {* F) b S3 u& O5 ^* l
velocity was 30 cm (12 inches). The examination of# J! _$ f( H( \ F
the neck revealed no thyroid enlargement.
4 S4 E5 T4 S2 u% u, HThe genitourinary examination was remarkable for
6 e5 K \+ J# M1 H+ G9 `1 {. senlargement of the penis, with a stretched length of; s* j% ~" } u/ J7 |
8 cm and a width of 2 cm. The glans penis was very well
) R5 u8 D" B! N/ t* X) E) j) Mdeveloped. The pubic hair was Tanner II, mostly around' @' `2 p1 J2 h+ y8 m
540
D5 E( f S5 xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from- \9 y! D7 n% B3 o; Z8 N- n
the base of the phallus and was dark and curled. The
, Z. N8 e, Q3 h( L7 q* O" }7 Ntesticular volume was prepubertal at 2 mL each.
) f3 Z* g- e8 ^9 [' ?; JThe skin was moist and smooth and somewhat* C2 B2 @. v1 w4 u5 U4 `
oily. No axillary hair was noted. There were no$ W. d3 L( Z! r2 `0 C
abnormal skin pigmentations or café-au-lait spots.
7 q4 j3 T- M) {! M6 BNeurologic evaluation showed deep tendon reflex 2+
+ v4 G4 h k, W/ |; ?: Y6 B& J" nbilateral and symmetrical. There was no suggestion/ A2 W, u3 J$ o+ w
of papilledema.
~6 m/ n; d+ W$ i( W. YLaboratory Evaluation
: S4 E, \; e- X2 o$ q5 r" MThe bone age was consistent with 28 months by5 p0 ]2 d- K! f" ~
using the standard of Greulich and Pyle at a chrono-
9 J1 J N6 M0 T& W1 n" _9 [logic age of 16 months (advanced).5 Chromosomal+ R* m t3 C U h6 W% x: u
karyotype was 46XY. The thyroid function test2 H4 `, T! U6 n" k
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
/ g2 v) j- ]8 a/ Y% a+ J ilating hormone level was 1.3 µIU/mL (both normal).
, ~$ v% t& K, _: OThe concentrations of serum electrolytes, blood. p0 Q; G% L+ z' H0 I3 u5 F$ n v
urea nitrogen, creatinine, and calcium all were
* g' a: S2 \! w& g; D& K. owithin normal range for his age. The concentration
, c6 `6 W. e& X; B! @; }7 y# }( cof serum 17-hydroxyprogesterone was 16 ng/dL
+ b: |4 h2 l6 k(normal, 3 to 90 ng/dL), androstenedione was 20
& c4 r; i2 d8 dng/dL (normal, 18 to 80 ng/dL), dehydroepiandros- o* @7 z$ @7 v
terone was 38 ng/dL (normal, 50 to 760 ng/dL),9 n! T# z4 C2 p0 {8 L: r- i- t
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
9 L" ]& U# B- {0 v% F49ng/dL), 11-desoxycortisol (specific compound S)2 c8 N+ c* X+ H1 C
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-; c5 `' h/ z: }
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total8 i, T+ T. k9 ~! X' W
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
1 ]! [3 O) x/ U( R) Yand β-human chorionic gonadotropin was less than
: D8 \7 K# `: h5 mIU/mL (normal <5 mIU/mL). Serum follicular" P) H; E; r# `( h* ~6 L
stimulating hormone and leuteinizing hormone
2 K! n$ {1 l% o& h/ Bconcentrations were less than 0.05 mIU/mL
- y p- f* O" u) ~- f/ H(prepubertal).
}) d# b0 g- |! H* O! B; a" `The parents were notified about the laboratory
0 Z4 l2 [4 y9 Q5 Q! [1 U8 A& Oresults and were informed that all of the tests were' W& S! {- X7 o' ?* m
normal except the testosterone level was high. The# t) J I2 }2 T& q
follow-up visit was arranged within a few weeks to) a# k- i* Q& D9 j e' Y2 c
obtain testicular and abdominal sonograms; how-
( }; v$ o( ~4 R: zever, the family did not return for 4 months.8 N0 v! Q$ k) g, Z8 T; w, _
Physical examination at this time revealed that the" b- E: {7 U4 K% e. \3 T3 h q2 `: i
child had grown 2.5 cm in 4 months and had gained
2 \0 w( Q# H% U+ y8 d2 kg of weight. Physical examination remained Z) I7 z9 b$ O" F% I: X, b
unchanged. Surprisingly, the pubic hair almost com-
" [+ P+ E$ D& p9 ? R* Ipletely disappeared except for a few vellous hairs at% ?$ T) x6 x( G( u$ J, s/ H6 |
the base of the phallus. Testicular volume was still 25 j7 m+ H7 g( u
mL, and the size of the penis remained unchanged.
' e( a3 y% x* p$ F- EThe mother also said that the boy was no longer hav-
+ H9 `' x; E4 q5 hing frequent erections.: _- ~4 p! P8 v* l2 d3 K$ v7 x
Both parents were again questioned about use of7 N6 z: ?+ v" V8 T. n
any ointment/creams that they may have applied to
! u2 ~" ]& [% U& Z: _9 xthe child’s skin. This time the father admitted the: |1 ^4 `8 i# N' k) L
Topical Testosterone Exposure / Bhowmick et al 541
* M5 H: Y( K+ V% Q, ]/ b6 y- [use of testosterone gel twice daily that he was apply-2 Q0 C2 p' e2 O& m) ^
ing over his own shoulders, chest, and back area for
2 l: b: e/ l6 Q& e4 h" e% va year. The father also revealed he was embarrassed
/ ]2 ~3 N9 O$ t/ v+ L6 H Q0 D7 ito disclose that he was using a testosterone gel pre-9 S/ p: M) ]- i9 N" Q
scribed by his family physician for decreased libido
& G/ r& C) |9 n! f! K$ isecondary to depression.
) {7 }: `- ^2 `4 a* QThe child slept in the same bed with parents.
y5 ^$ F1 U% ?The father would hug the baby and hold him on his" e' E/ D4 Z2 C
chest for a considerable period of time, causing sig-
c6 A. H3 A: |nificant bare skin contact between baby and father." m. Q/ H$ a1 V. o
The father also admitted that after the phone call,2 W; q& j8 ^7 X Q8 }' w
when he learned the testosterone level in the baby
: e I& D0 r0 S5 T' q. K) Mwas high, he then read the product information
: E' M, v* f- `4 Bpacket and concluded that it was most likely the rea-
3 Q8 J- B4 Z# ^$ e( F1 o3 {3 dson for the child’s virilization. At that time, they
4 f# s/ I1 }: h; o0 Jdecided to put the baby in a separate bed, and the
5 D6 A7 j6 s G3 }: Qfather was not hugging him with bare skin and had0 O/ S y( ~; p& r, B' ^$ H
been using protective clothing. A repeat testosterone. Z% n L( n8 l' d$ v
test was ordered, but the family did not go to the
: g) n% P2 o5 ~. K* |9 ilaboratory to obtain the test.& P. y3 X- e+ P0 G0 K o! T, F/ }
Discussion' m/ l! p. B# R+ ^
Precocious puberty in boys is defined as secondary
0 ?3 l z$ Y3 p! k0 y; Y. }2 ssexual development before 9 years of age.1,4
- P1 n9 `# g0 Z$ ?8 ~Precocious puberty is termed as central (true) when1 x# `. z8 I5 d
it is caused by the premature activation of hypo-
$ N1 b2 N; P1 Fthalamic pituitary gonadal axis. CPP is more com-
1 k U, W6 n9 qmon in girls than in boys.1,3 Most boys with CPP& a* F* h' Z8 G
may have a central nervous system lesion that is
+ F- C: q9 t ^: X; u- Kresponsible for the early activation of the hypothal-2 B* B: r! E) u b
amic pituitary gonadal axis.1-3 Thus, greater empha-0 p. \4 p; ]- M; V3 y. k
sis has been given to neuroradiologic imaging in
1 x: c7 Y0 {3 \boys with precocious puberty. In addition to viril-
7 s: ?& Y1 a- Q$ p5 k- G0 Q4 Sization, the clinical hallmark of CPP is the symmet-
" i+ l) i' _, [0 {* wrical testicular growth secondary to stimulation by
Z" Q7 l9 y$ Pgonadotropins.1,3
2 [3 K; c' i2 qGonadotropin-independent peripheral preco-2 C0 s t6 t( y
cious puberty in boys also results from inappropriate
" c2 u3 j2 i H3 @# _androgenic stimulation from either endogenous or! L- P$ e( {. J4 T! w, [' J' ?
exogenous sources, nonpituitary gonadotropin stim-
' |! t* B! H) P6 P* gulation, and rare activating mutations.3 Virilizing
3 d4 e" U7 w# q$ d+ ?- x0 R. \: R: `congenital adrenal hyperplasia producing excessive
" p9 P0 L7 a1 {7 U7 ^* M0 madrenal androgens is a common cause of precocious
; e5 z" o T# A' d3 A6 jpuberty in boys.3,4
/ g- r, `3 K. x( sThe most common form of congenital adrenal. e# }% {) ^& O6 [# W& K
hyperplasia is the 21-hydroxylase enzyme deficiency.
8 k) R, O' J3 L3 LThe 11-β hydroxylase deficiency may also result in
" X0 N1 |6 T3 ^excessive adrenal androgen production, and rarely,9 Z% p5 j0 s$ x( }1 Z, g
an adrenal tumor may also cause adrenal androgen
6 w& X/ Y+ s: I1 `6 Q% w' z# sexcess.1,3& c) e0 Q' Q$ _
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 T- x, G$ \( m542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
' _9 N4 H* \5 R5 aA unique entity of male-limited gonadotropin-
/ r W' C9 a1 D% k, Z, J, pindependent precocious puberty, which is also known
# h |0 {) g8 P. das testotoxicosis, may cause precocious puberty at a3 N' F; j2 R7 s
very young age. The physical findings in these boys' c, D0 Q: B) ^- K
with this disorder are full pubertal development,
% P0 [+ P5 x0 a6 r1 G3 Qincluding bilateral testicular growth, similar to boys$ z# [6 D7 o9 ?% g
with CPP. The gonadotropin levels in this disorder
- @: i/ T' ?, D. e5 ~- h5 {! fare suppressed to prepubertal levels and do not show
9 ~5 j4 s7 a: g$ y; t0 \& spubertal response of gonadotropin after gonadotropin-
' f5 |5 q6 O/ B0 \- e7 Areleasing hormone stimulation. This is a sex-linked
: @# u3 Z2 N" V( d& bautosomal dominant disorder that affects only
+ ?3 ?; y$ k7 O2 D. {# w4 nmales; therefore, other male members of the family
6 v! I5 e/ o# smay have similar precocious puberty.36 q2 u9 {6 [! G. r" N+ G
In our patient, physical examination was incon-$ N" r& r" v- n r8 N
sistent with true precocious puberty since his testi-3 r. _1 e; A' a1 K6 h
cles were prepubertal in size. However, testotoxicosis
. A' q4 y9 i' n5 b7 C5 K+ p# ewas in the differential diagnosis because his father* X: P7 O" y0 A9 Q/ J
started puberty somewhat early, and occasionally,) j% Y; _4 ?/ Z) J$ b8 i) r
testicular enlargement is not that evident in the
3 N, w7 R! v0 I! d/ \+ ^beginning of this process.1 In the absence of a neg-) j% d" C# S2 }& W; Q1 M5 r! { H
ative initial history of androgen exposure, our
6 e7 T" v( v1 a8 w' ^! Gbiggest concern was virilizing adrenal hyperplasia,) ]- p1 g9 i5 [' \, v
either 21-hydroxylase deficiency or 11-β hydroxylase* y6 m' @& i2 ]
deficiency. Those diagnoses were excluded by find-; Y9 n8 R" L- z, J' H$ J, \ @" [
ing the normal level of adrenal steroids.6 l& L C8 U. z3 Q% A4 m
The diagnosis of exogenous androgens was strongly
8 d6 I% s8 J& i# t( Ysuspected in a follow-up visit after 4 months because. ^) M, S) W* H/ p
the physical examination revealed the complete disap-
! P% P+ }4 m8 ^% `; J# Cpearance of pubic hair, normal growth velocity, and
; E, J% K5 \4 {) r% idecreased erections. The father admitted using a testos-+ o0 U! n& b- o9 S J
terone gel, which he concealed at first visit. He was
7 E8 e* I! T5 L1 R. b+ ?3 Husing it rather frequently, twice a day. The Physicians’
! }6 {2 @% ?3 b2 l# W! VDesk Reference, or package insert of this product, gel or( `0 ] K; L+ a* V
cream, cautions about dermal testosterone transfer to
! H0 C" i. R9 i( |% E# u7 P0 e3 Cunprotected females through direct skin exposure.5 B' ~$ V$ ^, p2 X
Serum testosterone level was found to be 2 times the
6 {& i5 f+ S0 P9 G; W4 dbaseline value in those females who were exposed to8 o/ l) |* ^1 _( `6 K' {6 E0 @
even 15 minutes of direct skin contact with their male
7 j5 |% F% q7 P1 o0 |% upartners.6 However, when a shirt covered the applica-
9 V9 N% K6 G9 ~( \tion site, this testosterone transfer was prevented.
4 }7 H" M" q% WOur patient’s testosterone level was 60 ng/mL,$ m5 ^8 A1 e2 i4 i1 O: X0 x
which was clearly high. Some studies suggest that
* X O% a" I, K' D7 ]dermal conversion of testosterone to dihydrotestos-$ L/ E4 e5 P- a9 e8 O5 _1 E
terone, which is a more potent metabolite, is more
/ N, \6 g! U* N0 Q5 Ractive in young children exposed to testosterone9 i3 m3 U! ?. B
exogenously7; however, we did not measure a dihy-
/ |) Z6 J% |- E0 jdrotestosterone level in our patient. In addition to
0 M: A0 |7 m5 H9 ~7 |2 h, Gvirilization, exposure to exogenous testosterone in
2 B0 N- n" v% l; P. _children results in an increase in growth velocity and
! ~2 R3 m0 s& E; j$ gadvanced bone age, as seen in our patient.+ x% A" a/ C/ ?( [
The long-term effect of androgen exposure during
& }8 x1 g7 K4 D$ Zearly childhood on pubertal development and final, @" j: R7 D3 t0 }$ {6 b
adult height are not fully known and always remain' k' A5 G" {5 B) w6 Q2 ]
a concern. Children treated with short-term testos-
* a7 {$ d# S! @- q! a9 O' Hterone injection or topical androgen may exhibit some
b( g& d- b5 s# w( l. T8 F3 oacceleration of the skeletal maturation; however, after
$ D; Z. r/ V: c Y- A4 Ycessation of treatment, the rate of bone maturation
N) Z+ \$ \) cdecelerates and gradually returns to normal.8,9
3 g! V6 B) t4 C- LThere are conflicting reports and controversy% i7 [* A; d: z1 x( O' n5 K
over the effect of early androgen exposure on adult
6 ~) ^* ~% y2 G, h, U# Z9 [; tpenile length.10,11 Some reports suggest subnormal+ j# b8 a, [ s6 ~( d$ t7 X
adult penile length, apparently because of downreg-
p6 J% P/ q! g ^0 P% S7 Zulation of androgen receptor number.10,12 However,
, ^! p1 F$ t4 e( G8 C9 T4 b- q5 RSutherland et al13 did not find a correlation between
+ G+ J0 {6 }% c* i5 ^0 zchildhood testosterone exposure and reduced adult
5 x# H0 n' Q) \8 S1 Epenile length in clinical studies.
) H v; R. i2 X; R1 `# ]& U% WNonetheless, we do not believe our patient is
! v# f: I3 J: ?going to experience any of the untoward effects from# Z5 A% _5 W. ~* ^2 U f
testosterone exposure as mentioned earlier because+ j7 x4 D9 L# P9 U
the exposure was not for a prolonged period of time.- [7 O1 v/ d% \
Although the bone age was advanced at the time of# L% K+ G. U8 D5 A
diagnosis, the child had a normal growth velocity at
) _: C7 g: \3 r* }/ J6 o7 ]4 Qthe follow-up visit. It is hoped that his final adult
4 k& _4 v- t5 o+ O3 @! H7 l& t- g( |height will not be affected.2 R2 Q$ q$ ]+ D7 i: d9 n6 A9 `
Although rarely reported, the widespread avail-
2 U+ m2 q6 Q, w( Jability of androgen products in our society may. T; S6 U+ W( c+ Q' `- ^; J8 V# j
indeed cause more virilization in male or female; G% K. u. C; k- \# t
children than one would realize. Exposure to andro-
? \0 G! b5 h6 O$ N" n: U7 jgen products must be considered and specific ques-
- O. ^9 }1 e1 i/ X" p1 itioning about the use of a testosterone product or9 k' `: Y0 B/ q. b" g
gel should be asked of the family members during9 x& s1 w$ c3 Q) `2 y G
the evaluation of any children who present with vir-9 @2 Y; `; Q j9 V8 W: y$ J
ilization or peripheral precocious puberty. The diag-
7 v7 [( E+ l; i+ ~* W& K. ~ U: U6 nnosis can be established by just a few tests and by
' L8 b: P' f4 @' |: p% _, mappropriate history. The inability to obtain such a- q6 E( ~; O/ b5 _% x
history, or failure to ask the specific questions, may2 q. Y3 T3 i( r5 V
result in extensive, unnecessary, and expensive( S, h5 i( e" p+ z
investigation. The primary care physician should be
S2 X8 r8 e( @$ \; h( i2 |aware of this fact, because most of these children
) u$ X7 Q) ^$ \may initially present in their practice. The Physicians’: `5 V7 _; s" b) ?/ e9 ?
Desk Reference and package insert should also put a* R& k9 C/ I) u# A7 Q
warning about the virilizing effect on a male or
4 \ ^. ]5 N, v* I0 J+ vfemale child who might come in contact with some-5 Y! W4 r7 L, u2 F" X$ u6 _% x0 }
one using any of these products.
0 J9 a# b. e; |7 WReferences' ^. Y' V: l& H4 A3 d, P
1. Styne DM. The testes: disorder of sexual differentiation
; y W9 t9 m! K9 cand puberty in the male. In: Sperling MA, ed. Pediatric
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2002: 565-628.
4 s3 [2 ~0 j; R9 ~ j2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious- u$ J/ a' r4 |3 n+ y$ P6 y |
puberty in children with tumours of the suprasellar pineal7 {2 o& h& `' v. G# c, g
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4 C+ N- y6 x2 a1 U5 K; l1 Q: F! kTopical Testosterone Exposure / Bhowmick et al 543
! _' d+ k( H* [* f% ]areas: organic central precocious puberty. Acta Paediatr.8 {& @! \( \5 k' ^$ k
2001;90:751-756.9 v6 s+ ~# ~4 P$ H" [ v
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.1 ?% z; t ?8 H
Pediatric Endocrinology. 4th ed. New York, NY: Marcel" r, ^$ A* \$ c* N$ k
Dekker Inc; 2003:211-238.
" F9 s- Z3 j, d% F! h/ i4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
# @& f. ?; ?$ p" zdevelopment in a two-year-old boy induced by topical
! ]% s3 A' g& y `exposure to testosterone. Pediatrics. 1999;104:e23.
5 g3 H1 `! o+ Y. @: i5. Greulich WW, Pyle SI, eds. Radiographic Atlas of" z! b5 ~$ d" p8 t" c9 P+ k
Skeletal Development of the Hand and Wrist. 2nd ed.9 q' Z" C2 z% \) T1 _
Stanford, CA: Stanford University Press; 1959.' H4 l/ y# m* Q* t
6. Physicians’ Desk Reference. Androgel 1% testosterone,( y5 d! w2 n- q8 q6 ]
Unimed Pharmaceutical Inc. Montvale, NJ: Medical/ e% ?9 G5 J2 Y8 F9 s$ x+ @* P
Economics Company, Inc; 2004:3239-3241.
" a% D1 Y9 {. a- l+ e0 m+ r7. Klugo RC, Cerny JC. Response of micropenis to topical
( K" T. k% d& R' ttestosterone and gonadotropin. J Urol. 1978;119:
# n' q" ]& n" l" a667-668.
! E: s3 k; S; ~8. Guthrie RD, Smith DW, Graham CB. Testosterone
/ {$ C" y. W, atreatment for micropenis during early childhood. J Pediatr.; U X; Y6 [! B/ ?/ @6 \
1973;83:247-252.
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