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is a significant concern for physicians. Central! f2 e& b6 c) Z$ q# F
precocious puberty (CPP), which is mediated2 \% `. w& |! K( l- \
through the hypothalamic pituitary gonadal axis, has9 d0 J3 \5 C4 k1 c
a higher incidence of organic central nervous system
( Q" |* S' j; [7 |5 u$ `lesions in boys.1,2 Virilization in boys, as manifested
3 w0 }" c' a4 L1 n! S# k& v8 yby enlargement of the penis, development of pubic4 i) \* r8 J1 d+ U6 E
hair, and facial acne without enlargement of testi-
( w- b8 p( m/ o9 Q; X0 l* y' N' {cles, suggests peripheral or pseudopuberty.1-3 We
. D" d; I' V) K" p, B% }report a 16-month-old boy who presented with the
! D+ I, C' y1 n) X2 e+ q3 genlargement of the phallus and pubic hair develop-# G1 Y- I4 B# q5 O
ment without testicular enlargement, which was due
* }# L! m) R4 i- V3 t# cto the unintentional exposure to androgen gel used by
( W/ ~" e: F6 W& m% L8 [, ?$ athe father. The family initially concealed this infor-
: |) [* V `8 D+ X2 ~3 V$ Imation, resulting in an extensive work-up for this' |* V! x7 d9 I( X: t
child. Given the widespread and easy availability of b: u! U( r: R) y3 X, p
testosterone gel and cream, we believe this is proba-5 y" ~8 `, V* m7 c8 O
bly more common than the rare case report in the
0 t# G8 E& ?8 c; }literature.4* k4 D$ \) |8 D) O: @( C4 H
Patient Report
2 P3 h. Y( ^0 ?$ e' m; ^4 t. s# sA 16-month-old white child was referred to the
( P. W# x3 P3 H" g2 Kendocrine clinic by his pediatrician with the concern1 s8 m; r! C8 o( ^* x) F3 W2 F
of early sexual development. His mother noticed+ O7 U2 U' d- `7 b0 Y
light colored pubic hair development when he was
5 d5 h# e3 D3 ~- X3 Y% h3 SFrom the 1Division of Pediatric Endocrinology, 2University of2 \7 e5 N6 Z" ~7 P$ a' U; n
South Alabama Medical Center, Mobile, Alabama. d- O; V, @# D- v, t: ]8 F' N* F
Address correspondence to: Samar K. Bhowmick, MD, FACE,8 \8 f2 c; d) d' g" _
Professor of Pediatrics, University of South Alabama, College of
; q) J( C1 e f* \Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
. u/ x s! |, k2 U4 M2 T( Ee-mail: [email protected].
: I( o. @3 y* `" }about 6 to 7 months old, which progressively became
+ D) P3 @4 N ]( r. k4 V edarker. She was also concerned about the enlarge-, N5 e% S5 r0 I1 a8 f1 }9 n
ment of his penis and frequent erections. The child+ x! d2 ?) W+ a+ H1 c5 c4 i3 u; U
was the product of a full-term normal delivery, with
* r4 F* T: C* a: s9 d# w" m5 ta birth weight of 7 lb 14 oz, and birth length of
! G I% ^' c7 x( |20 inches. He was breast-fed throughout the first year
) a$ Q6 s m4 C, Y: T4 M- @of life and was still receiving breast milk along with
& E: Y i. k6 B8 x( Q7 s; osolid food. He had no hospitalizations or surgery, g0 P5 W+ D; j! {. I$ J
and his psychosocial and psychomotor development* F/ _7 C( y7 k% v$ J
was age appropriate./ i4 i" T; q- H) B
The family history was remarkable for the father,1 q* a: E" A* r( \
who was diagnosed with hypothyroidism at age 16,- x& s/ d9 A; s, e/ R
which was treated with thyroxine. The father’s$ l5 P5 D6 W1 _/ c X
height was 6 feet, and he went through a somewhat
. v( c* O7 p4 b4 U- H0 bearly puberty and had stopped growing by age 14.' v0 o6 V- d; q9 W: n6 M2 n
The father denied taking any other medication. The" W, ^5 G0 p" i1 D4 N/ E5 C j
child’s mother was in good health. Her menarche, ~2 `" P' Y* L/ w/ Z
was at 11 years of age, and her height was at 5 feet1 y N& M# u4 j- D9 E, [7 }
5 inches. There was no other family history of pre-! |% W5 F7 v0 q5 V6 h9 i. D
cocious sexual development in the first-degree rela-
& |9 q! D6 l; N' Q" Ftives. There were no siblings.
7 Q7 x$ P5 h6 j0 V8 V" jPhysical Examination
5 K$ l5 ]* \* ^( U* jThe physical examination revealed a very active,3 b- O s: ?0 P( e; x
playful, and healthy boy. The vital signs documented8 s( p, c5 L8 v, W% f7 W
a blood pressure of 85/50 mm Hg, his length was/ i8 q y: i" U7 R
90 cm (>97th percentile), and his weight was 14.4 kg0 {& K2 i: _0 `$ P/ }2 `8 W
(also >97th percentile). The observed yearly growth
, V0 b+ o7 \4 `4 j; O- l: \velocity was 30 cm (12 inches). The examination of
7 H6 V! l( b1 ~' W3 v: }/ Athe neck revealed no thyroid enlargement.% h- U3 N) I0 r6 @: `1 z6 e( f% D
The genitourinary examination was remarkable for, l9 T5 D* Z5 q. [% w7 _. \2 T
enlargement of the penis, with a stretched length of# ^ k1 C9 L3 j+ c( X8 b; C
8 cm and a width of 2 cm. The glans penis was very well
$ Z8 @$ Z7 m. v6 f0 @7 A9 @8 H" S2 j. xdeveloped. The pubic hair was Tanner II, mostly around0 z( V/ `. u# v) k" E/ s$ o& E* E
540
# S8 U) W0 k6 t0 y# z/ G5 J9 Zat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 L6 H4 O, o- ]3 V' t7 I
the base of the phallus and was dark and curled. The, ^8 _6 g8 V) H; s2 j
testicular volume was prepubertal at 2 mL each.
: F3 |5 f7 ?* K2 a+ VThe skin was moist and smooth and somewhat: c" z" |' x/ B6 D. O/ p3 _; Q
oily. No axillary hair was noted. There were no4 K7 @0 j0 Y3 Q1 t6 r- H
abnormal skin pigmentations or café-au-lait spots.
" O9 N8 z+ Y+ FNeurologic evaluation showed deep tendon reflex 2+% T5 T. h2 Q1 M$ P. t0 @, Y$ Y
bilateral and symmetrical. There was no suggestion
& H! [) P7 C4 G$ y# Eof papilledema.$ v8 N( f& j3 v4 E9 x) m) s7 Z
Laboratory Evaluation
( T: N$ M* ?3 B0 q3 B+ ]3 m1 ]The bone age was consistent with 28 months by- G0 A4 M$ q0 [3 b N+ J+ t) y
using the standard of Greulich and Pyle at a chrono-# p8 a6 x2 y8 Q I! v
logic age of 16 months (advanced).5 Chromosomal$ v. ^% b# F+ m9 F( ]
karyotype was 46XY. The thyroid function test
$ F0 Q5 D+ J, b9 @- R( Z& L3 \showed a free T4 of 1.69 ng/dL, and thyroid stimu-$ V7 Y( Q H9 U5 D+ ^
lating hormone level was 1.3 µIU/mL (both normal).& C! i% y, Y% s7 g1 I
The concentrations of serum electrolytes, blood! H, H j$ n. L1 ?5 Y- J( f) p: @/ P
urea nitrogen, creatinine, and calcium all were
) H7 \' v2 k1 S0 iwithin normal range for his age. The concentration
/ G2 ]/ X' u' c" _ d* uof serum 17-hydroxyprogesterone was 16 ng/dL& [0 f' m* O6 N" i+ I7 t
(normal, 3 to 90 ng/dL), androstenedione was 204 `1 g6 T0 H" T
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& l7 j% y8 @; F. z% Y' I2 lterone was 38 ng/dL (normal, 50 to 760 ng/dL),
! A9 ]$ d9 |% z, ^desoxycorticosterone was 4.3 ng/dL (normal, 7 to
3 l/ p8 V% O S& Z7 z49ng/dL), 11-desoxycortisol (specific compound S)% L0 u. ]9 _& g6 ]4 X9 B
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-6 Y; t4 u. I+ r. [3 f& J, v, D
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total& S, S4 B; f* X, e b
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
- |3 f) Z, s, }! z8 `/ Jand β-human chorionic gonadotropin was less than
. e# O& J/ n+ x! b" w& I: N$ p5 mIU/mL (normal <5 mIU/mL). Serum follicular
# b# a6 o5 `* Pstimulating hormone and leuteinizing hormone1 ~4 B) _# ]; P0 n! |' n
concentrations were less than 0.05 mIU/mL) I$ _: G9 z! M5 f7 i: k9 _& f
(prepubertal).7 W% R% H9 P/ q7 {/ C, t
The parents were notified about the laboratory5 Z" R8 v9 o# \5 _" @# [2 k3 o
results and were informed that all of the tests were
: p/ G/ e3 E! R6 nnormal except the testosterone level was high. The( t. l" C: ]: ] z
follow-up visit was arranged within a few weeks to/ T( Z. R" d- J% w, A
obtain testicular and abdominal sonograms; how-
+ j) x* N# D7 f3 lever, the family did not return for 4 months.
4 ], M) N8 v/ }6 G: ZPhysical examination at this time revealed that the7 S* i3 } r/ N
child had grown 2.5 cm in 4 months and had gained) z, \6 x4 Q9 }/ x, B; l6 x
2 kg of weight. Physical examination remained S( }0 _; S, h9 C" b$ \
unchanged. Surprisingly, the pubic hair almost com-
9 J, Z/ D& v( ~* ~, A3 \pletely disappeared except for a few vellous hairs at
+ U7 h0 _3 C C% a9 }the base of the phallus. Testicular volume was still 2) }4 I9 N! A+ C/ I) Z+ ]
mL, and the size of the penis remained unchanged.
: R! K4 A1 Z+ |/ C7 I; MThe mother also said that the boy was no longer hav-
5 e6 o5 |) o* T3 _3 D! King frequent erections.
$ H9 c V0 C% z" L6 s' ABoth parents were again questioned about use of
/ S a4 W1 E7 s/ U a2 K2 gany ointment/creams that they may have applied to7 N3 n2 P% n5 c! L: s
the child’s skin. This time the father admitted the
9 x' p2 C' Z; E' }! FTopical Testosterone Exposure / Bhowmick et al 541
5 w! j; T4 M! W* F2 M! C8 T1 @8 ?use of testosterone gel twice daily that he was apply-
# w' n( M8 A. A4 D; Q6 `- ling over his own shoulders, chest, and back area for5 k! n c5 M4 E- Q
a year. The father also revealed he was embarrassed
( A2 c) Z- i4 {& p( Qto disclose that he was using a testosterone gel pre-5 K5 H* X' h y. |
scribed by his family physician for decreased libido
5 p$ B ~0 }' [# y9 s4 [secondary to depression.
F% \4 |) R; V6 ~The child slept in the same bed with parents./ F5 V# t. C# z* W& n# o# w
The father would hug the baby and hold him on his
. m& r' k( Q* u; X+ O4 z7 {chest for a considerable period of time, causing sig-
* S9 R' t& V2 q( c: }! Pnificant bare skin contact between baby and father.
- m- q S$ p7 eThe father also admitted that after the phone call,; w3 |6 _( F; i1 @# {' v
when he learned the testosterone level in the baby
+ B! k0 C# v# I" W' u1 Dwas high, he then read the product information, m( v }/ G( x) ]- v' I& b8 j
packet and concluded that it was most likely the rea-9 k+ m9 b& m" P( J. ?! N
son for the child’s virilization. At that time, they$ V, f7 Z# S% g$ q, B3 F
decided to put the baby in a separate bed, and the8 ~, g7 }1 p4 t: u& Y4 }, J. q
father was not hugging him with bare skin and had4 V! E, o/ V: W
been using protective clothing. A repeat testosterone4 W6 a4 d9 }* Z1 n1 ?, y
test was ordered, but the family did not go to the% r0 R0 ~! _1 L) K
laboratory to obtain the test.0 m6 M' Z# B% j- M2 d! R
Discussion
3 Y+ m- H3 ~4 q3 H+ YPrecocious puberty in boys is defined as secondary
) a* w; j7 `0 b! f. j, `. Vsexual development before 9 years of age.1,4
' V" ~! Y- ]1 o4 D! UPrecocious puberty is termed as central (true) when
; m5 {) N5 P$ z7 z: b* Qit is caused by the premature activation of hypo-
* I9 h- J ^! {4 }1 A1 Sthalamic pituitary gonadal axis. CPP is more com-
5 Z' Q" {+ L9 B0 L) l) S( N8 smon in girls than in boys.1,3 Most boys with CPP
6 f, }% _" ?! d f. h9 pmay have a central nervous system lesion that is
& S+ B3 y$ i& G! k$ \( aresponsible for the early activation of the hypothal-# e6 n/ H& b% f7 k1 s
amic pituitary gonadal axis.1-3 Thus, greater empha-
9 i% T1 u" @ d! I8 F7 Psis has been given to neuroradiologic imaging in4 D1 x3 b% n" D+ w
boys with precocious puberty. In addition to viril-
. o( d( w) h& c, b F3 E; E b7 Vization, the clinical hallmark of CPP is the symmet-' K% r& Y( S# \
rical testicular growth secondary to stimulation by
) l1 Y6 l; b, l" y2 Dgonadotropins.1,3
4 P' f0 h1 n& lGonadotropin-independent peripheral preco-* ], O3 U' y4 h9 P6 {
cious puberty in boys also results from inappropriate, s( X. u, `8 U8 A% h8 L# }) E
androgenic stimulation from either endogenous or
3 {5 O! \* E' l# q: Cexogenous sources, nonpituitary gonadotropin stim-/ k7 n/ k* Y* S( V
ulation, and rare activating mutations.3 Virilizing5 f% {4 Z" W, M
congenital adrenal hyperplasia producing excessive3 L$ q6 W+ T' f7 k; L
adrenal androgens is a common cause of precocious
% G1 t( A' \ ]* y- C' c/ J9 Ipuberty in boys.3,4
" W1 e3 K/ @, j/ V: iThe most common form of congenital adrenal
4 A3 l: W. d$ bhyperplasia is the 21-hydroxylase enzyme deficiency.
6 z' b1 O' j! |: ~The 11-β hydroxylase deficiency may also result in: H& N2 K* ]- d" q9 L% l* V1 Y' f" y
excessive adrenal androgen production, and rarely,
! \5 K- \8 F* Van adrenal tumor may also cause adrenal androgen
% O* g+ S6 u; N2 x( fexcess.1,31 A: B2 d8 l5 b, \( X4 X
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 V# j" O( x6 R9 R' h. r$ H$ N542 Clinical Pediatrics / Vol. 46, No. 6, July 20071 z' E; d. R' B- w8 I/ [
A unique entity of male-limited gonadotropin- g& m0 l8 f3 i0 q0 i7 ^
independent precocious puberty, which is also known
* a! x3 C+ N: {8 o) Las testotoxicosis, may cause precocious puberty at a
8 G2 D$ Z& o5 y3 W4 O6 d' Z- }very young age. The physical findings in these boys
% R% {* X+ o( i, Hwith this disorder are full pubertal development,
8 ]# Y' L5 C: d7 k: R* Q Jincluding bilateral testicular growth, similar to boys
5 p2 |+ z- F& f) i& Kwith CPP. The gonadotropin levels in this disorder! m# D& _% u& V! X5 O
are suppressed to prepubertal levels and do not show
1 X/ A3 E1 W; I6 N9 l6 P/ D; qpubertal response of gonadotropin after gonadotropin-. k& {7 R. | m" @3 {: e
releasing hormone stimulation. This is a sex-linked
" q, S) @9 U, |- rautosomal dominant disorder that affects only4 f% Y+ j4 l/ }# E4 o
males; therefore, other male members of the family
% W4 h: {# O. Imay have similar precocious puberty.3
% C$ C$ {6 B$ _) b/ g3 oIn our patient, physical examination was incon-; G: a5 [: I8 ^; c0 Q) C& J2 [
sistent with true precocious puberty since his testi-; L% m; `" J+ g
cles were prepubertal in size. However, testotoxicosis! R8 _: z4 d* I; o( |
was in the differential diagnosis because his father2 d7 @! k; \1 a3 N, j
started puberty somewhat early, and occasionally,+ i9 n. }+ k2 C# `5 v
testicular enlargement is not that evident in the
8 G( {+ ?5 g! D2 X3 abeginning of this process.1 In the absence of a neg-
% ^/ l3 W' x- A; z& ?ative initial history of androgen exposure, our
7 H4 I& }- Q: p: Qbiggest concern was virilizing adrenal hyperplasia,
. N) g% A& `, e. {$ h* Ueither 21-hydroxylase deficiency or 11-β hydroxylase0 n2 j; o' y! o
deficiency. Those diagnoses were excluded by find-- t! w& o9 G8 R- D$ a4 D% t6 `
ing the normal level of adrenal steroids.
f0 j3 O- d. n3 j% o: bThe diagnosis of exogenous androgens was strongly
( y; }: s6 y# h8 xsuspected in a follow-up visit after 4 months because
9 F4 {% c. }3 P4 q) {$ V- Nthe physical examination revealed the complete disap-+ c2 }* Q! C: d7 r8 Y) r2 W1 t
pearance of pubic hair, normal growth velocity, and
8 K' o6 @/ Y2 _0 L4 b5 O: }decreased erections. The father admitted using a testos-4 T1 C, [4 C1 `" \+ B) E' i9 }
terone gel, which he concealed at first visit. He was
7 z- z( `) {' {using it rather frequently, twice a day. The Physicians’
7 \9 H/ q7 c% \, o1 U0 uDesk Reference, or package insert of this product, gel or
0 T5 x* {% s: D6 ocream, cautions about dermal testosterone transfer to4 z! A8 G2 m: ^" o: D, J
unprotected females through direct skin exposure.& W6 a* g1 c: t w* ]
Serum testosterone level was found to be 2 times the
( h6 |& `% ^8 J1 D4 \4 D2 v/ ?/ Nbaseline value in those females who were exposed to0 j" n7 g$ G' b
even 15 minutes of direct skin contact with their male1 Q6 x. K" J+ ?5 n; ~
partners.6 However, when a shirt covered the applica-# m" }0 h$ K( H6 F, P/ v$ e" L2 Y
tion site, this testosterone transfer was prevented.
/ ]1 s& e% I, Y; G; s% cOur patient’s testosterone level was 60 ng/mL,
# t, V! @( T) {9 Q' x& J! v. W# Pwhich was clearly high. Some studies suggest that( J% O& f/ S! j& {2 l
dermal conversion of testosterone to dihydrotestos-1 Z) R& u! N: S
terone, which is a more potent metabolite, is more
& o3 u' z+ [ M* }, X! b( V) r; vactive in young children exposed to testosterone+ L% ^: U' a# N
exogenously7; however, we did not measure a dihy-
3 B. U! k; E$ A3 |drotestosterone level in our patient. In addition to
$ C! J# G& y5 @virilization, exposure to exogenous testosterone in( i/ }4 y) |- _" w
children results in an increase in growth velocity and( g8 I2 n. a5 J; K
advanced bone age, as seen in our patient.
/ ?+ `$ T3 T3 _( q/ G+ Z4 g/ ?9 {The long-term effect of androgen exposure during3 W1 w' U3 m- @8 U7 A' v; X
early childhood on pubertal development and final3 ~& w) P2 L2 w0 ^3 j; f, v
adult height are not fully known and always remain0 Z9 ^$ r6 D5 g5 ]: X
a concern. Children treated with short-term testos-9 K7 [( A7 i4 i! a) P
terone injection or topical androgen may exhibit some
6 F- B& ?- A) p. M& o+ {2 U) D1 Zacceleration of the skeletal maturation; however, after$ M" A% q& j) I7 }5 Z
cessation of treatment, the rate of bone maturation
$ A! e0 o, Q9 R* _ Z9 bdecelerates and gradually returns to normal.8,96 I- p6 ?: p' Q( ?7 y9 C9 V
There are conflicting reports and controversy4 I1 G: U3 b; R, B$ f8 t
over the effect of early androgen exposure on adult; V a# G2 a% r1 z
penile length.10,11 Some reports suggest subnormal' @; ?5 z; K! u; |' x' |5 G
adult penile length, apparently because of downreg-
+ k8 F* U/ U, gulation of androgen receptor number.10,12 However,9 b+ }: t3 w2 G7 {+ R) y" \; L
Sutherland et al13 did not find a correlation between
8 }$ s/ O0 u9 [childhood testosterone exposure and reduced adult$ X1 A: P4 ]& \( P: ]8 V
penile length in clinical studies.+ a* V) \$ X1 M% ] W
Nonetheless, we do not believe our patient is* I: C; d& \) i+ J- B S
going to experience any of the untoward effects from8 C: q$ p3 y E7 V' _. w `( i
testosterone exposure as mentioned earlier because
; ]3 ^% G! S" V. n9 B) }; A4 \6 othe exposure was not for a prolonged period of time.
) A2 t# g- S$ l3 ?Although the bone age was advanced at the time of
8 ^ V# `& A! L7 @1 |* y$ {. Hdiagnosis, the child had a normal growth velocity at% R4 @# C1 o" k, p' {2 ~
the follow-up visit. It is hoped that his final adult2 N7 P4 ~ M5 G
height will not be affected.1 N+ _. E4 s- Q2 r. g
Although rarely reported, the widespread avail-0 P2 Z2 A K ] x) s+ {, {3 m
ability of androgen products in our society may
& |7 B7 P0 g1 g7 u9 H/ S; zindeed cause more virilization in male or female/ f) f8 e( K+ k4 G/ T
children than one would realize. Exposure to andro-+ q: J& u4 s& u
gen products must be considered and specific ques-
7 w% K0 r- M6 L- Ktioning about the use of a testosterone product or
1 P, Y1 w: R# K6 k7 @gel should be asked of the family members during* ^1 F9 R9 F2 I& A+ [4 U& Y( |4 l
the evaluation of any children who present with vir-
" A @* C- c+ [" S4 }ilization or peripheral precocious puberty. The diag-
( Z' D1 A+ d) xnosis can be established by just a few tests and by% f* w6 l( b1 o; X0 Q9 ^# `. r
appropriate history. The inability to obtain such a @8 \2 B8 y0 M/ f0 c( Y+ K
history, or failure to ask the specific questions, may
4 I9 u+ S) U5 D' x6 n' s$ {result in extensive, unnecessary, and expensive% B+ X$ {& c3 [( Y& R2 V
investigation. The primary care physician should be* l$ H) X6 Z9 V4 t
aware of this fact, because most of these children
3 J' t' w$ S2 z' Bmay initially present in their practice. The Physicians’, N5 r' @4 a- i) m8 s
Desk Reference and package insert should also put a
1 [# s. Z, c2 B+ D Y% }warning about the virilizing effect on a male or% U; P! F0 g$ J* _1 i$ T
female child who might come in contact with some-
3 E7 X' X4 s+ ?9 y2 m8 {2 Gone using any of these products.
3 R& a1 \( W! D6 h QReferences+ P. I' N( y0 \
1. Styne DM. The testes: disorder of sexual differentiation
9 f' B2 p8 X8 y# A9 ^2 [1 B% dand puberty in the male. In: Sperling MA, ed. Pediatric
d+ Z4 l0 v# h$ \; rEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
, S$ e I6 W) l% w2002: 565-628.
: w9 B1 p8 m& f, V! z2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
4 l$ L! ^" s1 s* fpuberty in children with tumours of the suprasellar pineal
: h3 X3 B1 D G3 V) mat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
# U0 H6 d! O) a, L0 ?Topical Testosterone Exposure / Bhowmick et al 543/ p F# e8 l. i* k
areas: organic central precocious puberty. Acta Paediatr.
5 X4 a' s9 Q+ c7 i, a2001;90:751-756.
' p. Y3 R0 j+ N+ A1 O" k3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
) U5 ]5 o; }) A. p' zPediatric Endocrinology. 4th ed. New York, NY: Marcel
, Q/ G$ V9 u: R; W2 }% fDekker Inc; 2003:211-238.$ D4 p. r- c9 C# W& h, e
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual: |; M5 m/ P2 f6 Y; U. u# u
development in a two-year-old boy induced by topical
* {) ^) c6 z |6 `( V+ i+ H! vexposure to testosterone. Pediatrics. 1999;104:e23.. y6 S, P. f. t7 j
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of/ k% @0 L& Q" {
Skeletal Development of the Hand and Wrist. 2nd ed.
0 r$ [- U4 {$ Z" H! J+ T& LStanford, CA: Stanford University Press; 1959.
* o+ q/ D# H2 i; {& Y: f( d6. Physicians’ Desk Reference. Androgel 1% testosterone,8 C" }- T+ a* [* K+ e2 f3 K* r6 }
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
- i5 I0 D% }. b' T- HEconomics Company, Inc; 2004:3239-3241.
1 Y: b. @2 k! z, l3 I8 }# V7 m7. Klugo RC, Cerny JC. Response of micropenis to topical$ H$ C& H6 t7 s7 \1 H3 n! ] y
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