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is a significant concern for physicians. Central1 I- t# \6 @4 W& I9 y" P
precocious puberty (CPP), which is mediated
9 g( L9 U( x3 f. n7 x2 ]through the hypothalamic pituitary gonadal axis, has
' d$ t {- o# W0 h+ Na higher incidence of organic central nervous system# p; [+ V# i9 F& \* u6 M ]3 _ Y
lesions in boys.1,2 Virilization in boys, as manifested+ C) Q, }* h: O2 B
by enlargement of the penis, development of pubic
9 w7 [$ r8 s% A" \" X/ Fhair, and facial acne without enlargement of testi-5 m/ U; k( B. ~0 A1 M4 t
cles, suggests peripheral or pseudopuberty.1-3 We
4 ~! B1 T& P9 }, @/ _report a 16-month-old boy who presented with the+ e" J2 t; t$ q/ w; {6 `
enlargement of the phallus and pubic hair develop-8 S7 ~2 x1 X& v+ I& O
ment without testicular enlargement, which was due+ c1 \1 A1 d A6 s1 P* B i
to the unintentional exposure to androgen gel used by
. G! Z& ]# Y. s: H; z7 Zthe father. The family initially concealed this infor-
! i0 C$ G. u( ~mation, resulting in an extensive work-up for this
! {7 U& {4 B \5 _: }child. Given the widespread and easy availability of
6 t# H* |1 O4 m9 etestosterone gel and cream, we believe this is proba-' d6 ~5 C7 m" O& q+ I
bly more common than the rare case report in the3 P' [# P2 R; _3 m0 r
literature.4+ S: M# p0 p2 r6 e2 e5 {
Patient Report
- _; _1 o& t9 Y8 P4 xA 16-month-old white child was referred to the- _3 |+ Q7 h+ {2 A3 }5 g- a; [
endocrine clinic by his pediatrician with the concern) e# Z" S: c! Q
of early sexual development. His mother noticed
/ D# }# i( w- y% Olight colored pubic hair development when he was
) V5 I9 J! G5 H+ JFrom the 1Division of Pediatric Endocrinology, 2University of
$ K3 L# Q: l+ A1 q2 x L6 gSouth Alabama Medical Center, Mobile, Alabama.; T( O$ M r* `- v( y& s' ]- V
Address correspondence to: Samar K. Bhowmick, MD, FACE,
' y7 ?9 M/ o& Z5 \) A* ]$ z1 SProfessor of Pediatrics, University of South Alabama, College of
: f$ x4 E6 W3 s# i8 L: tMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
8 |8 Q" l' ~& V- A- E# j |$ Ce-mail: [email protected].: Q7 ?6 C6 x1 F P' g7 @9 i9 V
about 6 to 7 months old, which progressively became
* t" \9 _ c) [' Xdarker. She was also concerned about the enlarge-7 k% A8 M4 y& m" d3 X
ment of his penis and frequent erections. The child
. B8 a* `( S* U% B% ^: mwas the product of a full-term normal delivery, with6 e8 E j+ B- k+ ^+ s/ i7 K; r
a birth weight of 7 lb 14 oz, and birth length of
: Y0 i6 Y5 k/ ^20 inches. He was breast-fed throughout the first year
, h; m& S( A* P4 r$ [: U; fof life and was still receiving breast milk along with
0 p! t4 y; z, ~! isolid food. He had no hospitalizations or surgery,, q- \' p6 j0 I6 s
and his psychosocial and psychomotor development, h# ]% A9 W6 n$ r4 F. l3 Y
was age appropriate.
7 L% x5 I: I! k% k E0 gThe family history was remarkable for the father,
6 L$ A8 {' {: b3 Rwho was diagnosed with hypothyroidism at age 16,
) V" g' Z3 g* z3 `which was treated with thyroxine. The father’s" x$ J+ P5 U$ x4 H; U! ^
height was 6 feet, and he went through a somewhat, M, q$ G. d6 ]8 F
early puberty and had stopped growing by age 14.
% A& ?- } z' [3 n/ O# q! A! _! hThe father denied taking any other medication. The( e9 n, ^% S9 ^- _, x$ C/ G- y
child’s mother was in good health. Her menarche
1 e! W9 c# {) D" Z8 Cwas at 11 years of age, and her height was at 5 feet! @; u! R5 A( L5 v" b
5 inches. There was no other family history of pre-
8 k7 H" J! q9 e1 Lcocious sexual development in the first-degree rela-
4 c# p4 E, \! a" c- ?' t. Jtives. There were no siblings.- W9 M) H+ f, E. }4 a
Physical Examination, ]" D& ]7 ?5 X" d
The physical examination revealed a very active,
! w. }' ]! m. A. o4 @3 Yplayful, and healthy boy. The vital signs documented
3 _ B5 J O" n. [8 B+ ]5 ja blood pressure of 85/50 mm Hg, his length was
, e( ?( L( I, y90 cm (>97th percentile), and his weight was 14.4 kg& y* A2 M' h, n0 {) Q' T0 p& v1 N
(also >97th percentile). The observed yearly growth
J+ x: [: L0 @% O, u _( _velocity was 30 cm (12 inches). The examination of
( c r2 E) Q4 t0 k9 dthe neck revealed no thyroid enlargement.$ _6 t5 s% e7 _2 n S) h
The genitourinary examination was remarkable for5 {9 W0 ^" y6 \- M& I4 F# B) Q8 G
enlargement of the penis, with a stretched length of' G2 ]: p% |3 G3 d9 G3 I6 ]" F
8 cm and a width of 2 cm. The glans penis was very well, K- v& G* U& g5 Q8 U/ Y& O
developed. The pubic hair was Tanner II, mostly around
( `- g% n* ]5 `2 h# R2 P- H540: H( k) ~9 u2 \8 T9 J/ k
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
% u1 x) ^7 m8 e( v# p+ |: q- \the base of the phallus and was dark and curled. The
& a- X/ T, ^/ I* T1 O7 Ptesticular volume was prepubertal at 2 mL each.
2 O! c5 Z4 k% ]; gThe skin was moist and smooth and somewhat% p1 r% W# X8 T3 A
oily. No axillary hair was noted. There were no
+ b, m6 ]* q6 [! m" g* @abnormal skin pigmentations or café-au-lait spots.% ]# q$ B/ M' x. U1 ~
Neurologic evaluation showed deep tendon reflex 2+. y9 b" B0 s) I, ^
bilateral and symmetrical. There was no suggestion
* J1 H2 p/ h" c7 N, Tof papilledema., G! H. N$ h6 G0 N) Z& x
Laboratory Evaluation- ]2 Y1 |' D0 B$ U f. M
The bone age was consistent with 28 months by
8 S+ J X6 s5 d/ ^' ]7 `using the standard of Greulich and Pyle at a chrono-
Z! g5 G2 W% [) g. Y" Zlogic age of 16 months (advanced).5 Chromosomal
/ I" a& q5 {. f( jkaryotype was 46XY. The thyroid function test
- @- J+ x7 A2 C+ n5 zshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
! m) B/ I- k. s E" b3 l2 Ulating hormone level was 1.3 µIU/mL (both normal).' w+ G. d3 f/ M! ?- T+ x7 V; U% W
The concentrations of serum electrolytes, blood
+ I! X1 d4 g: I5 G+ Curea nitrogen, creatinine, and calcium all were
6 U9 A: R4 ?/ z3 @/ q* c9 Fwithin normal range for his age. The concentration, {2 h$ }, S: _ s* J
of serum 17-hydroxyprogesterone was 16 ng/dL
( X% q. m( O& _; ](normal, 3 to 90 ng/dL), androstenedione was 20$ w6 p; n3 |9 z8 d1 f' ~9 t, I
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
5 p. v7 W, i& zterone was 38 ng/dL (normal, 50 to 760 ng/dL),% j9 r5 ]6 ~/ Y. z. v1 ]
desoxycorticosterone was 4.3 ng/dL (normal, 7 to0 z) Q; x$ ^- _" ^1 t
49ng/dL), 11-desoxycortisol (specific compound S)% ~/ G) O; I% q( Y0 Y1 z* \
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-) ~% W2 w3 ~! v( q6 O
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
7 M5 R7 t+ ~ u" utestosterone was 60 ng/dL (normal <3 to 10 ng/dL),8 b, p; u C; P |: A
and β-human chorionic gonadotropin was less than
: B7 T& b j& G! h. ]8 k" T s! S5 mIU/mL (normal <5 mIU/mL). Serum follicular/ X, g, `5 r0 T! ]
stimulating hormone and leuteinizing hormone
, x( n% H" l' n" A! c2 cconcentrations were less than 0.05 mIU/mL
' u3 ]* ~# N: _* H# P i' ~(prepubertal).3 S5 m- c k) l& ]1 o
The parents were notified about the laboratory$ p1 Z7 y* `3 e2 e+ @
results and were informed that all of the tests were5 k% g$ \- X7 [1 d8 M, [
normal except the testosterone level was high. The
/ Y. F# d. S$ w$ ?7 S) M! rfollow-up visit was arranged within a few weeks to
) Q! j" B. C" D, Z+ B& {obtain testicular and abdominal sonograms; how-3 p" ^) r6 S- F+ J2 Z! ~1 f
ever, the family did not return for 4 months.# _! g" P0 t- q: Q; [9 N
Physical examination at this time revealed that the
7 \9 t9 D9 E# _child had grown 2.5 cm in 4 months and had gained
. b( p2 ~- o9 |# j: o: S9 j2 kg of weight. Physical examination remained
' M3 m4 M( k) n' gunchanged. Surprisingly, the pubic hair almost com-* g$ R8 A8 x4 D1 d5 |3 e, }, G3 s
pletely disappeared except for a few vellous hairs at
* X) S2 y4 g5 Qthe base of the phallus. Testicular volume was still 2
7 Y$ k) Q, i1 w* W; `mL, and the size of the penis remained unchanged.
9 H) i! z; j: A5 `The mother also said that the boy was no longer hav-
' e# P, @& Z4 l5 Hing frequent erections.* a U ~4 k) ]
Both parents were again questioned about use of
* x" ]( B: D4 D h6 q4 `any ointment/creams that they may have applied to
9 C! `' I( ^5 |1 X3 nthe child’s skin. This time the father admitted the) m5 x. l0 x4 \; A
Topical Testosterone Exposure / Bhowmick et al 541
. ^, W" }: L5 x- S; Vuse of testosterone gel twice daily that he was apply-
+ v4 x& q+ v; \4 W' wing over his own shoulders, chest, and back area for, c' |5 B, l$ g8 |& t
a year. The father also revealed he was embarrassed
( m, m6 |$ V8 h# O. z% ]7 nto disclose that he was using a testosterone gel pre-
# V* ^/ E H7 S7 G; v$ s, k$ Tscribed by his family physician for decreased libido8 [: c I8 c% Y5 I
secondary to depression.
$ B1 ?! D9 ]% w$ C$ sThe child slept in the same bed with parents.
5 _: o6 M9 u3 M7 {. S3 C) b, m1 nThe father would hug the baby and hold him on his3 ~: Q3 M B4 X; i( F2 q
chest for a considerable period of time, causing sig-
q- A8 b1 z' @4 Snificant bare skin contact between baby and father.# J. Z! T/ i6 i
The father also admitted that after the phone call,
9 \8 m- Y, c1 S. h8 Qwhen he learned the testosterone level in the baby" r) T" ]1 b4 w4 r! I8 Q
was high, he then read the product information
6 B: F& ~6 j9 r h' a* S' Wpacket and concluded that it was most likely the rea-! V6 M' P. Z0 \* _" @
son for the child’s virilization. At that time, they
/ ]& S, H6 E/ edecided to put the baby in a separate bed, and the
5 g* c& [2 |: x+ d2 a8 A9 p5 ifather was not hugging him with bare skin and had
1 D( U$ [0 o( H. f4 G |0 F, P( Xbeen using protective clothing. A repeat testosterone- b3 Q# v$ ^$ v
test was ordered, but the family did not go to the' L* |( J1 K* r& h
laboratory to obtain the test.9 U; K2 a% k# m0 ~1 e1 F! W
Discussion# H+ J2 Q& C, ~
Precocious puberty in boys is defined as secondary6 o% M( s0 }9 J( f% P" |
sexual development before 9 years of age.1,42 v; ^& Z8 U6 o* j' p
Precocious puberty is termed as central (true) when, ~$ U2 |1 o8 E7 R& `
it is caused by the premature activation of hypo-
j v R- l: X- p$ C; }- V7 B4 @2 Dthalamic pituitary gonadal axis. CPP is more com-' A! d/ d! t% h% Y! g2 p
mon in girls than in boys.1,3 Most boys with CPP
5 g( R2 _4 X: K2 d4 }1 a; Z/ umay have a central nervous system lesion that is! R; ]& T. B! a. R6 N7 D
responsible for the early activation of the hypothal-& x p- z. \$ A/ f6 p! Z
amic pituitary gonadal axis.1-3 Thus, greater empha-# p V; n8 o& O. ?
sis has been given to neuroradiologic imaging in# \, f$ q/ B" _& B# r0 k8 P
boys with precocious puberty. In addition to viril- q0 S& d9 ~! W/ i
ization, the clinical hallmark of CPP is the symmet-
. r8 T7 p% m5 ~% T, ~# urical testicular growth secondary to stimulation by
, y( j! u, N' o' n" |% [$ t. Ggonadotropins.1,3
' y v" b+ {0 \' K" p: YGonadotropin-independent peripheral preco-
9 s) Y$ `7 _# Y) ]9 J2 Tcious puberty in boys also results from inappropriate$ s- H1 S) O4 n/ D
androgenic stimulation from either endogenous or$ S" \; U8 o1 I) }$ x; e
exogenous sources, nonpituitary gonadotropin stim-: {, ]& j/ D4 D0 b
ulation, and rare activating mutations.3 Virilizing9 i3 X) M' m# N6 A0 _3 L' O
congenital adrenal hyperplasia producing excessive
4 `* L# w8 `: Q* Madrenal androgens is a common cause of precocious
1 K2 ?* n* K* q! ]6 w& x/ {puberty in boys.3,4" I" Q0 t: n$ p( }7 [8 A/ {) }
The most common form of congenital adrenal
0 c. a! X. I# d0 i( s( y, Ohyperplasia is the 21-hydroxylase enzyme deficiency.3 _1 b9 c1 P& h+ Z" o R
The 11-β hydroxylase deficiency may also result in
5 N `2 h; r' C: kexcessive adrenal androgen production, and rarely,) Y0 ~( s4 {" M& w- {/ V, Z9 X3 e
an adrenal tumor may also cause adrenal androgen7 ^5 \7 Q7 x, H3 ]
excess.1,38 x+ C) h" ~* U4 _5 h! q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' @/ t1 K8 I- i! ]6 @: \
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
! Q4 `5 ?7 {5 K4 t- QA unique entity of male-limited gonadotropin-
7 P; M) ]6 V* O7 C9 ~independent precocious puberty, which is also known+ L1 k3 R& K" n
as testotoxicosis, may cause precocious puberty at a
6 f( {, h7 g* k- q1 a- mvery young age. The physical findings in these boys/ L* i; f2 l8 x4 j! t/ C
with this disorder are full pubertal development,
; u8 z+ B2 x7 C) vincluding bilateral testicular growth, similar to boys* V* H8 K# A8 b/ ]- j# U
with CPP. The gonadotropin levels in this disorder
1 n9 H# ]/ y( x+ a2 @are suppressed to prepubertal levels and do not show1 a& `4 s9 m$ q3 H* {
pubertal response of gonadotropin after gonadotropin-
3 [1 ]# V) X4 Q6 }7 O# Oreleasing hormone stimulation. This is a sex-linked
* N1 U/ ]# l8 g% d4 I6 yautosomal dominant disorder that affects only
$ j% m& @0 \! L8 @+ O9 g8 ^6 cmales; therefore, other male members of the family
4 j5 {# Q* i, d ~/ Gmay have similar precocious puberty.3* k0 @5 r d# |5 K; q* Y7 g, l
In our patient, physical examination was incon-8 R6 \2 o( b: y$ U3 g9 |$ h6 a6 r
sistent with true precocious puberty since his testi-! n* f; y e T
cles were prepubertal in size. However, testotoxicosis& d v* H- u! ]2 c' ` [
was in the differential diagnosis because his father4 l) E3 I% S; ?, |
started puberty somewhat early, and occasionally,
! L9 G4 W& l9 |testicular enlargement is not that evident in the
, v* T+ Q; }* N) G5 I- t# X; jbeginning of this process.1 In the absence of a neg-$ H3 N V( c$ o# R, j2 `
ative initial history of androgen exposure, our# w. V7 t7 o+ X! V) N, O, r; k
biggest concern was virilizing adrenal hyperplasia,8 |0 @- }' I* {9 I, z* H- }
either 21-hydroxylase deficiency or 11-β hydroxylase
3 q y/ m0 A$ k; Y0 edeficiency. Those diagnoses were excluded by find-
5 q3 ?- H, B$ D; i# Q: x# c; qing the normal level of adrenal steroids.
5 H0 Z* d; V# V6 Y( m& BThe diagnosis of exogenous androgens was strongly0 x3 _: b6 s) E; `6 m8 h
suspected in a follow-up visit after 4 months because$ M) U% v6 ~" J
the physical examination revealed the complete disap-
7 t- }# I Z" M( m8 Mpearance of pubic hair, normal growth velocity, and
7 e8 M4 q7 D' E6 w+ _decreased erections. The father admitted using a testos-
( _" Q# s/ d4 Xterone gel, which he concealed at first visit. He was
* ^7 N/ S. w. ] |using it rather frequently, twice a day. The Physicians’* k' H$ b: C" H$ h
Desk Reference, or package insert of this product, gel or. p$ Y- M2 T- S% X& A& l" Y$ D- e
cream, cautions about dermal testosterone transfer to
V1 B5 Y7 S$ B$ [' r9 t yunprotected females through direct skin exposure.# O, x9 X1 A( O6 t
Serum testosterone level was found to be 2 times the- `) R+ e3 ?6 x7 N7 |
baseline value in those females who were exposed to
# E; S3 g# v% a3 y/ leven 15 minutes of direct skin contact with their male3 R, G) w8 ~- u
partners.6 However, when a shirt covered the applica-
) ?" K" u! H4 v* J1 Ation site, this testosterone transfer was prevented.7 m9 _4 p! h- \5 ]' K
Our patient’s testosterone level was 60 ng/mL,/ Q/ T o l! b8 A1 X. P1 Z
which was clearly high. Some studies suggest that& A& R3 j$ C8 Y) d m* F2 T) J
dermal conversion of testosterone to dihydrotestos-
0 x. ?- y1 I, K7 pterone, which is a more potent metabolite, is more
; Z2 N, y& j) Y9 Gactive in young children exposed to testosterone+ P) \# ^' [) K
exogenously7; however, we did not measure a dihy-
$ o! s; Q" i1 {+ v) Ldrotestosterone level in our patient. In addition to |9 }6 S. R& n( C+ D, h
virilization, exposure to exogenous testosterone in6 F+ q; ?7 s/ S+ {" f7 R1 @
children results in an increase in growth velocity and5 T( a7 g7 x! V2 o) S/ G
advanced bone age, as seen in our patient.
/ Y3 Y& @! `& M3 sThe long-term effect of androgen exposure during, a; }9 {4 C2 K- V5 C5 n( L
early childhood on pubertal development and final
7 Y( }3 X, ]" g+ t- i! Padult height are not fully known and always remain# Y4 a7 P" T) e! o5 F6 Y) @
a concern. Children treated with short-term testos-
. m5 @ x( e4 h Q6 s$ Qterone injection or topical androgen may exhibit some: w- [: F" M0 i& P/ h4 K5 x) i7 g$ O
acceleration of the skeletal maturation; however, after
) Z; Q. q& G; x8 gcessation of treatment, the rate of bone maturation
5 ?6 D4 D) l! R: ^2 x: `decelerates and gradually returns to normal.8,9% O- t0 N! E# B7 k) Q6 @, k$ r
There are conflicting reports and controversy" O- x8 l' Z2 i! i
over the effect of early androgen exposure on adult
; h6 t+ |: }# o6 _4 u) C$ w& p" wpenile length.10,11 Some reports suggest subnormal
8 b, _; ]4 r3 n' aadult penile length, apparently because of downreg-
; Q K% M* u8 F( l" [; d+ Zulation of androgen receptor number.10,12 However,
4 E. s! Q0 K$ ^7 X* hSutherland et al13 did not find a correlation between- @, k8 w8 y) o$ X6 H0 d
childhood testosterone exposure and reduced adult' e( W6 q& i; s5 W
penile length in clinical studies.
/ E5 r6 M% ~' u2 C& w: z" @Nonetheless, we do not believe our patient is
7 B i4 q* @( c2 z- R. @: G- K4 fgoing to experience any of the untoward effects from. n+ @5 j$ }. m( B
testosterone exposure as mentioned earlier because6 O% m4 I2 l! N" e0 t) A
the exposure was not for a prolonged period of time.
+ A" T* B ]8 v' [Although the bone age was advanced at the time of
( ]; j2 g' d* b3 P3 d" z/ G4 zdiagnosis, the child had a normal growth velocity at7 z7 j7 u7 I5 a. b& [
the follow-up visit. It is hoped that his final adult/ w- p, n$ @7 w0 @: p3 b( M
height will not be affected.$ b+ \8 J1 o+ z: L ]2 f
Although rarely reported, the widespread avail-9 p) D3 H# B' l4 C8 q7 `
ability of androgen products in our society may
9 w; x+ z; K: W5 I7 ]indeed cause more virilization in male or female
T) m% X# W- Y/ U1 [# V) Tchildren than one would realize. Exposure to andro-7 L$ c( C, w( B* h) {
gen products must be considered and specific ques-* o! ~* W' Y7 C* k. ]9 H+ g# \: m( G
tioning about the use of a testosterone product or
2 L3 N U3 U3 D# Agel should be asked of the family members during
, w' |0 A0 `" Y& ?the evaluation of any children who present with vir-
2 R! x4 v) n$ W' Wilization or peripheral precocious puberty. The diag-! B/ x. W& X& f1 E
nosis can be established by just a few tests and by
$ I8 \: r0 e9 m& a7 a+ Z' W) G2 D! |appropriate history. The inability to obtain such a9 b2 L9 T& D' ~
history, or failure to ask the specific questions, may
9 s) t: \' g; Z: N7 yresult in extensive, unnecessary, and expensive
5 _5 J/ B, |- o2 x6 C8 u) @investigation. The primary care physician should be
; {% n* w g" w; x' I. o# O7 Daware of this fact, because most of these children
1 w* E `0 P% e1 O8 |- Qmay initially present in their practice. The Physicians’2 E' U z. `' H
Desk Reference and package insert should also put a
9 p1 {- G# L* c: Zwarning about the virilizing effect on a male or, E2 F4 t6 i" y6 v! O! m0 F
female child who might come in contact with some-
/ D/ Y, [( |. p4 _5 @/ R$ Bone using any of these products.
$ j, `+ Z9 o, X- }: mReferences
+ W9 z: ]% y6 N ~) C/ ~2 a! u1. Styne DM. The testes: disorder of sexual differentiation3 G. {! G# N3 @3 L# ^/ y. i7 O
and puberty in the male. In: Sperling MA, ed. Pediatric
8 y: l1 |' J4 c8 b# x# y n: i" aEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;4 l5 c) H# ?) T, C4 V
2002: 565-628.6 X5 {5 P3 N7 k& X8 y
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
" Q2 c" M. I( U0 `2 opuberty in children with tumours of the suprasellar pineal# {9 `+ G* u5 w3 Y7 r' J! A9 [
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Topical Testosterone Exposure / Bhowmick et al 543
* x R7 x9 K: O; l: A" K7 c' Xareas: organic central precocious puberty. Acta Paediatr.3 {; H+ q3 o/ P0 q2 p6 r
2001;90:751-756.
; q& @) d {8 v6 E3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
+ e6 ^7 p, H- e0 fPediatric Endocrinology. 4th ed. New York, NY: Marcel
H" F! u- J+ |6 e0 T& ADekker Inc; 2003:211-238.
5 c" J* y6 g& K6 G/ M4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
5 _' O# L4 I- A W( wdevelopment in a two-year-old boy induced by topical& u8 S! U9 P3 L: _2 S0 {
exposure to testosterone. Pediatrics. 1999;104:e23.
% Y. Y( ?' ^ m% @5. Greulich WW, Pyle SI, eds. Radiographic Atlas of7 C. w/ N+ ?+ t' G
Skeletal Development of the Hand and Wrist. 2nd ed.
# E& P! |9 F, ?5 \2 ~; R4 OStanford, CA: Stanford University Press; 1959.
8 F7 X# _. p' ]( B& i3 F6. Physicians’ Desk Reference. Androgel 1% testosterone,
4 z9 @% n. H$ y& H/ Y7 NUnimed Pharmaceutical Inc. Montvale, NJ: Medical7 }1 x+ [2 V& {2 C, k i
Economics Company, Inc; 2004:3239-3241.
; \$ p& Q$ D3 U7. Klugo RC, Cerny JC. Response of micropenis to topical
0 y5 m# a3 ?" u) Z: S2 l8 l0 Btestosterone and gonadotropin. J Urol. 1978;119:7 |) d" D- a: |2 n5 ]( l
667-668.$ p+ H8 K" |2 [! T' A F
8. Guthrie RD, Smith DW, Graham CB. Testosterone* r- `. T$ T5 ^& V/ c
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