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is a significant concern for physicians. Central
# V; B8 c, G8 p; W0 x* bprecocious puberty (CPP), which is mediated1 Z; Z; q8 D( x
through the hypothalamic pituitary gonadal axis, has7 e" t; `$ ~3 _* i
a higher incidence of organic central nervous system! u5 j& D4 n9 |1 g" v. M3 U
lesions in boys.1,2 Virilization in boys, as manifested8 x8 H& q) X$ t3 H' u7 P
by enlargement of the penis, development of pubic
7 h: \' [% _( G$ q, hhair, and facial acne without enlargement of testi-) @: X Y+ B& L( S6 h# {# W, t
cles, suggests peripheral or pseudopuberty.1-3 We
7 V1 e! d& u( z/ a [8 ?report a 16-month-old boy who presented with the0 M7 q$ {1 \$ r7 z {
enlargement of the phallus and pubic hair develop-
' `% D8 S' m0 w q- Wment without testicular enlargement, which was due8 W2 o; S; j6 Z3 ]7 `7 {
to the unintentional exposure to androgen gel used by
/ d. M2 q* o% ?( @/ Xthe father. The family initially concealed this infor-
/ |4 ?- C+ x. Z) f* ?# omation, resulting in an extensive work-up for this
- `$ ]5 E# `& qchild. Given the widespread and easy availability of% F' b6 _& [# Q1 X) b( R
testosterone gel and cream, we believe this is proba-
+ x8 m7 P6 ~: M1 d: V1 v) }bly more common than the rare case report in the* d. i# K0 c( e3 U. S1 J
literature.4
3 \* `7 Z' F- b/ k" ]Patient Report" c# ^/ ~# m8 H# w. e/ @! {4 G
A 16-month-old white child was referred to the
7 _: ]( T) A5 n' ^$ [. N. O9 R0 S5 Wendocrine clinic by his pediatrician with the concern( ^2 Q" Z4 `* v6 V) _
of early sexual development. His mother noticed
9 l ]6 D) ]: L) Y4 P/ blight colored pubic hair development when he was
4 B; b1 A& l0 X! |& }From the 1Division of Pediatric Endocrinology, 2University of
; Y% N5 t# \& A( |: s' ~; L. d9 k- ESouth Alabama Medical Center, Mobile, Alabama.
; Y1 |: J3 m! i0 \) A; H1 \Address correspondence to: Samar K. Bhowmick, MD, FACE,7 z( r3 _; z0 r7 S% ]2 N; v- h7 }
Professor of Pediatrics, University of South Alabama, College of% P; `7 R$ T3 i
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
$ V; u# e! s5 ee-mail: [email protected].
3 l* H6 L ^( a% q- P3 {2 eabout 6 to 7 months old, which progressively became" Z2 e9 T# a3 W& M2 k2 P! Y+ x7 F
darker. She was also concerned about the enlarge-) G9 `0 h9 e# O9 f
ment of his penis and frequent erections. The child
, \: _( t+ z! Kwas the product of a full-term normal delivery, with/ E6 q" a! v n$ t5 D+ ?
a birth weight of 7 lb 14 oz, and birth length of
, A: b( L$ L1 o' M% c20 inches. He was breast-fed throughout the first year1 r( ~ ~0 _0 L9 J
of life and was still receiving breast milk along with( ^1 @, U6 C D) w; |/ A
solid food. He had no hospitalizations or surgery,- x" E0 }# Z3 P0 P& n
and his psychosocial and psychomotor development3 [2 N% u" S) W2 k! u2 n# x7 K5 i
was age appropriate.
% D9 }" J' W) f3 Y0 o- [- PThe family history was remarkable for the father,
5 r( `- T: t+ H1 r* H4 Rwho was diagnosed with hypothyroidism at age 16,! Q/ C0 O- x2 A8 \
which was treated with thyroxine. The father’s
9 v4 G1 j8 }& Hheight was 6 feet, and he went through a somewhat
* G6 [4 g7 g) I/ @7 Y X4 dearly puberty and had stopped growing by age 14.
k, A+ X9 Q" i4 K3 l, ?7 hThe father denied taking any other medication. The
( n" s; L) t9 _( |child’s mother was in good health. Her menarche& n o+ I& k6 V6 u
was at 11 years of age, and her height was at 5 feet
9 ~& n4 N. I7 u1 m. h) ?# [& i5 inches. There was no other family history of pre-
6 O; u x l! O# qcocious sexual development in the first-degree rela-0 J# W) [ X( N% |/ i
tives. There were no siblings.
3 Y. E5 ~/ [ j1 k& DPhysical Examination8 q* a# n0 u6 B& }0 I
The physical examination revealed a very active,
; a1 u( R) d* T) W+ z% Y, Dplayful, and healthy boy. The vital signs documented
) t/ i! q) c' k4 Y" ta blood pressure of 85/50 mm Hg, his length was
; b; W, A% I3 q9 @% y5 p90 cm (>97th percentile), and his weight was 14.4 kg
, E# N" C) j7 d/ ?(also >97th percentile). The observed yearly growth
; v r' D2 b* U" Q* z X( t9 bvelocity was 30 cm (12 inches). The examination of
; t n7 A5 h1 d! L3 y. e, G3 Y9 rthe neck revealed no thyroid enlargement.
& I0 M* f+ F' V7 |2 l- |6 \, n! eThe genitourinary examination was remarkable for
$ b+ ]# }7 }6 e: U' f/ X; ]% tenlargement of the penis, with a stretched length of5 H4 R) k8 _# ?9 \1 [" W- j
8 cm and a width of 2 cm. The glans penis was very well
. ~2 M g% e4 ^8 B* }developed. The pubic hair was Tanner II, mostly around
0 q/ r6 E9 _$ l! H0 B0 c% S; `540# `( [' A5 O1 \3 j0 \2 l
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 [ W' H0 [' k- L2 Ythe base of the phallus and was dark and curled. The
+ C/ Z. _4 w; D9 l/ k0 A0 ptesticular volume was prepubertal at 2 mL each.
6 o4 ?4 V, z# g: u) J( SThe skin was moist and smooth and somewhat
6 v6 x& k/ I- w7 u! }oily. No axillary hair was noted. There were no
! g% ?+ u9 W! uabnormal skin pigmentations or café-au-lait spots.# ~! Q6 j( R3 Q+ @# e# ?, M
Neurologic evaluation showed deep tendon reflex 2+
% L, k. {+ B. l+ ?bilateral and symmetrical. There was no suggestion
- q ^4 `4 P/ o4 d: Y& z, zof papilledema.
5 g! u; V% p; LLaboratory Evaluation* R, |8 i, x$ U9 q" w- q
The bone age was consistent with 28 months by% S. q9 c. J2 S4 _8 G
using the standard of Greulich and Pyle at a chrono-
6 S$ j2 t8 M) V H; T ^logic age of 16 months (advanced).5 Chromosomal" T4 Q6 ~* y3 w+ g; n" p
karyotype was 46XY. The thyroid function test
8 J- g( Z/ Y$ o5 e! w- {showed a free T4 of 1.69 ng/dL, and thyroid stimu-
. W0 P# l' Y* ]lating hormone level was 1.3 µIU/mL (both normal).
w, E' t1 B7 I' jThe concentrations of serum electrolytes, blood3 a5 U) p7 K: n
urea nitrogen, creatinine, and calcium all were4 U5 K( c1 F4 W
within normal range for his age. The concentration( R! n# v; S$ \# m2 w+ W' S
of serum 17-hydroxyprogesterone was 16 ng/dL
# N# y/ W7 T! i5 l% w/ I& l/ V(normal, 3 to 90 ng/dL), androstenedione was 20
: L. n% s" M6 t. Ong/dL (normal, 18 to 80 ng/dL), dehydroepiandros-: v, E; |4 q8 J! ^# [8 z5 R9 O5 F
terone was 38 ng/dL (normal, 50 to 760 ng/dL),1 `3 L' w; x: d% D& Z7 P
desoxycorticosterone was 4.3 ng/dL (normal, 7 to) S9 F. p/ O: |8 ?% N# z
49ng/dL), 11-desoxycortisol (specific compound S)
# m1 Z E% g8 C$ dwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-6 C) V0 P0 T* ]
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total8 J: J; t' K; `. J3 b7 A. q
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),0 Y0 I: J9 i e; K X2 v! {
and β-human chorionic gonadotropin was less than
1 j6 Z" E: l0 n; s5 _( D, W5 mIU/mL (normal <5 mIU/mL). Serum follicular
* Y+ @+ N* t1 L/ K8 t! N& v% Istimulating hormone and leuteinizing hormone$ [% }1 i8 s2 s6 H% |
concentrations were less than 0.05 mIU/mL
0 Y8 `$ A& w$ |! c(prepubertal).
. j! B8 Z7 y% Q' ]( uThe parents were notified about the laboratory; v+ z& @$ d# z
results and were informed that all of the tests were
! J- ~2 ^* v) i8 u/ I8 fnormal except the testosterone level was high. The
8 \ D# N9 o- e4 Vfollow-up visit was arranged within a few weeks to
1 T4 N; ?0 C7 X8 h3 Oobtain testicular and abdominal sonograms; how-
; T$ l: G6 O4 n+ L& H* Z6 Uever, the family did not return for 4 months.
. l/ p: T$ S2 F3 X4 f/ uPhysical examination at this time revealed that the
! o" ]6 p: R( ~3 Z: Fchild had grown 2.5 cm in 4 months and had gained
# a2 c4 M: U6 U. K, z2 kg of weight. Physical examination remained
6 z/ ~2 u Z9 V: ~# ^unchanged. Surprisingly, the pubic hair almost com-
; c$ h9 k5 R0 h" _* t9 s% `. xpletely disappeared except for a few vellous hairs at
~: R& c1 x! k4 M- ^ x# gthe base of the phallus. Testicular volume was still 2
: k& u, u+ |4 k; Z* GmL, and the size of the penis remained unchanged.
4 S" r& z8 ?7 F" I) KThe mother also said that the boy was no longer hav-- q: z5 Z% {" F2 @4 C
ing frequent erections.) F* }. j1 \ J# u
Both parents were again questioned about use of
. |2 Z5 ~7 }! C7 W2 P1 @% ?any ointment/creams that they may have applied to
# l% t7 s- U# {/ c% U1 l. uthe child’s skin. This time the father admitted the+ x1 o% j$ F5 w- ?' p
Topical Testosterone Exposure / Bhowmick et al 541
8 M/ F0 E* J7 M7 J/ b9 Ause of testosterone gel twice daily that he was apply-
4 u) G9 r5 t# A% \6 P- fing over his own shoulders, chest, and back area for3 p+ q6 r- i" F. _* x- R
a year. The father also revealed he was embarrassed6 l8 O6 U% w$ }; q6 b/ `
to disclose that he was using a testosterone gel pre-$ p0 _+ Z2 m5 D
scribed by his family physician for decreased libido" z# l% t9 G n" u4 f( {' v6 {
secondary to depression.7 j" \+ t [8 f6 C: R h+ D1 T4 W
The child slept in the same bed with parents.8 f, X8 ~ G9 n5 F# B6 B
The father would hug the baby and hold him on his
' m! Q% J8 k. W2 K' x: m" n. Fchest for a considerable period of time, causing sig-
+ e$ v2 E" A8 V1 tnificant bare skin contact between baby and father.
1 s" d% O& f1 i7 pThe father also admitted that after the phone call,- f: I/ H j4 ]9 r8 z5 F, o
when he learned the testosterone level in the baby
& N; i" t4 H: l1 z# z6 L, ]6 V1 Cwas high, he then read the product information" T% H+ e8 o# u" J! \
packet and concluded that it was most likely the rea-
( d- ~1 t$ \- p4 A8 P/ L% ason for the child’s virilization. At that time, they
' q) ~# f. P# _+ Z3 Qdecided to put the baby in a separate bed, and the
/ i6 B" z% p& ^6 i% Ffather was not hugging him with bare skin and had
" X. t+ t+ w- C6 m( {been using protective clothing. A repeat testosterone
m# W2 d; r5 A. U7 H' [1 Htest was ordered, but the family did not go to the6 o5 q9 B4 A8 U6 p5 q1 p) I/ ^
laboratory to obtain the test.8 F( @0 ~2 Z9 `
Discussion% n$ M8 V, @) T" \1 p/ b
Precocious puberty in boys is defined as secondary
8 N1 O- {4 l. |; x% Q4 t: R3 gsexual development before 9 years of age.1,40 F- l; n1 d5 a7 F2 Z; j
Precocious puberty is termed as central (true) when
" g$ ?6 s* ^ s/ i5 a+ H% Kit is caused by the premature activation of hypo-
! O* Z) B/ B$ ~5 Q6 f( c0 {& Lthalamic pituitary gonadal axis. CPP is more com-% p- N, O( l& |/ u5 e$ s
mon in girls than in boys.1,3 Most boys with CPP
' W. _' P& d( x% y3 c# N1 amay have a central nervous system lesion that is
4 u; K" s$ k( qresponsible for the early activation of the hypothal-( q* m8 b" ?) N8 m, R1 ?
amic pituitary gonadal axis.1-3 Thus, greater empha-, E; ^( j- t6 {
sis has been given to neuroradiologic imaging in
6 l1 ^# G3 I, W/ c$ Zboys with precocious puberty. In addition to viril-
' j7 Q) B; t+ [7 A q7 j( N6 E, Rization, the clinical hallmark of CPP is the symmet-6 `( M+ n) Y, D" p& J5 c: K
rical testicular growth secondary to stimulation by- Q! ?+ a0 a- \4 i# x7 E' k
gonadotropins.1,39 D" \7 y0 k: b6 s+ _8 i1 a
Gonadotropin-independent peripheral preco-4 X7 H/ H. J8 q% o1 z4 {
cious puberty in boys also results from inappropriate; ^; L) Q/ q% I1 }# F
androgenic stimulation from either endogenous or
: K+ l0 u8 w5 N6 [( B, C% ^exogenous sources, nonpituitary gonadotropin stim-5 ^4 O+ F/ Z$ t# D( Q
ulation, and rare activating mutations.3 Virilizing
. o4 q2 ]9 I- x* Q2 Ccongenital adrenal hyperplasia producing excessive+ T' T4 @) n+ c* {$ c
adrenal androgens is a common cause of precocious, z# n& ~1 s. D5 C) a1 E6 t
puberty in boys.3,41 {- U+ |& t+ L. N( h4 E
The most common form of congenital adrenal( P' k8 k8 E6 p$ ?
hyperplasia is the 21-hydroxylase enzyme deficiency.2 U' q m7 ?: _7 r1 D! w" m
The 11-β hydroxylase deficiency may also result in
( {2 F0 i2 M |' Sexcessive adrenal androgen production, and rarely,. J+ x, p @. \5 v
an adrenal tumor may also cause adrenal androgen( n3 }$ H: m3 m
excess.1,3
" Y4 q2 j! \0 E# z1 p. k2 {at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from+ z8 j/ @" @/ `4 L
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
8 a a& m1 c; C, m5 W! ]- M* }- l' yA unique entity of male-limited gonadotropin-
& h0 o( g% `6 J0 B8 vindependent precocious puberty, which is also known
2 f$ T- R# P& K* j5 kas testotoxicosis, may cause precocious puberty at a1 P& B# c, y5 X, j
very young age. The physical findings in these boys3 b% h! j5 p) Y8 O! S
with this disorder are full pubertal development,
% I3 }6 w/ `' {" o* M7 l& w9 o* gincluding bilateral testicular growth, similar to boys. Q) ]3 g! y' T, G
with CPP. The gonadotropin levels in this disorder
1 k) z8 G! ^1 M3 ware suppressed to prepubertal levels and do not show! T5 D$ S; ^# ~, a5 n% J( R
pubertal response of gonadotropin after gonadotropin-
, O' ?- @# {: H: ]& u+ greleasing hormone stimulation. This is a sex-linked
3 v; s" i* M* I' t) d( Gautosomal dominant disorder that affects only$ ]- z, e) D f# ^2 Z- ?: G7 y
males; therefore, other male members of the family" X, [) [$ j+ X9 T- `+ [( `5 \
may have similar precocious puberty.3$ z4 M; S/ l* |
In our patient, physical examination was incon-% \& @. |7 r! Z: P3 U. f# f
sistent with true precocious puberty since his testi-. L4 u: b$ D2 b O. r
cles were prepubertal in size. However, testotoxicosis2 i* v2 M! Z8 j8 H2 D/ @9 r0 t, @
was in the differential diagnosis because his father: r: |+ D! j! b/ f, d
started puberty somewhat early, and occasionally,
& l1 ~2 h4 N4 h. ~7 z' E, wtesticular enlargement is not that evident in the+ s: a) ?% G. z: q
beginning of this process.1 In the absence of a neg-
% p1 v, x& a! H0 G8 Z+ K- |ative initial history of androgen exposure, our
3 L: D/ }' e$ F1 @3 X7 u8 n' N+ s; N; Cbiggest concern was virilizing adrenal hyperplasia,4 `- L0 v1 w. o4 t
either 21-hydroxylase deficiency or 11-β hydroxylase) o. w% L( i8 {* _7 G( R
deficiency. Those diagnoses were excluded by find-
1 u! @4 H8 E) T1 ring the normal level of adrenal steroids.. E1 m4 q: r* G' A& B, f
The diagnosis of exogenous androgens was strongly
' W# Q6 ^8 |, Z( _7 Zsuspected in a follow-up visit after 4 months because
M z1 u+ J4 ?the physical examination revealed the complete disap-. X3 G2 f7 |. T4 E
pearance of pubic hair, normal growth velocity, and
6 |/ }- w2 p( ~1 p$ f0 Ndecreased erections. The father admitted using a testos-6 V6 x) D; v! m: m& c7 ]
terone gel, which he concealed at first visit. He was
; ^; [% j: `& U# R* U4 x) wusing it rather frequently, twice a day. The Physicians’7 A2 H" ^% z) f8 l
Desk Reference, or package insert of this product, gel or
( w$ H- P2 w* ~+ `% Y6 gcream, cautions about dermal testosterone transfer to
5 n- K( N9 |* [' C+ X6 iunprotected females through direct skin exposure.
( T( e5 z$ L USerum testosterone level was found to be 2 times the
$ H2 r- c2 h+ X9 U6 E. kbaseline value in those females who were exposed to
' j, F5 u3 @, _5 t/ y% r% p" beven 15 minutes of direct skin contact with their male
. T: S f1 T k J9 Z$ ipartners.6 However, when a shirt covered the applica-5 s- C1 z4 P' v
tion site, this testosterone transfer was prevented.5 n' K9 h, e5 Y1 u: ~; [4 \
Our patient’s testosterone level was 60 ng/mL, d" s! _9 i( Y) D5 T
which was clearly high. Some studies suggest that4 b& I/ ~& r& [1 p0 k/ c
dermal conversion of testosterone to dihydrotestos-
" X4 H1 w- N. ~* @! q( {4 xterone, which is a more potent metabolite, is more1 |' O9 h# q4 h7 X/ N2 T# z
active in young children exposed to testosterone' V: W8 m; Y) @0 H
exogenously7; however, we did not measure a dihy-0 n$ F- v X! U6 v8 F( q6 r+ f" {
drotestosterone level in our patient. In addition to
7 c/ V$ K# k; yvirilization, exposure to exogenous testosterone in. _) b* w" Z( e. q3 X& D
children results in an increase in growth velocity and1 R7 y- ^4 C9 d2 f# M
advanced bone age, as seen in our patient.$ m, j- C+ X6 S7 c3 `5 P ^4 y0 C7 m
The long-term effect of androgen exposure during" e& d, {7 E$ v
early childhood on pubertal development and final
( s# }7 E+ v! q' R8 F1 madult height are not fully known and always remain
- E9 f6 p! s/ A2 r5 W/ a7 Ca concern. Children treated with short-term testos-! D# _9 s, T* I4 G& Q4 [+ y
terone injection or topical androgen may exhibit some
6 }- W5 K3 h [$ Eacceleration of the skeletal maturation; however, after% v' K- E3 _' b$ B, a
cessation of treatment, the rate of bone maturation
4 h$ Q. P; [- e5 ?- D( r: Q5 _" ]decelerates and gradually returns to normal.8,9. D% ]- f) }4 t2 z8 S8 R7 J, b
There are conflicting reports and controversy8 \8 J" D! ~ M2 w
over the effect of early androgen exposure on adult
: y) k+ z8 a1 \( Upenile length.10,11 Some reports suggest subnormal
9 l( j7 _5 b& Q, Ladult penile length, apparently because of downreg-7 S& x+ ^8 i) P
ulation of androgen receptor number.10,12 However,
( X. }* y$ Y7 S. [( q WSutherland et al13 did not find a correlation between0 H) e* E/ Z! t, W
childhood testosterone exposure and reduced adult
- ^8 @! d5 H5 dpenile length in clinical studies.
+ s; N0 T/ b, x$ oNonetheless, we do not believe our patient is. E. r) D3 R/ C. ~: m0 p0 f) t4 w
going to experience any of the untoward effects from9 s3 J+ {9 [2 `5 n" W/ B, w
testosterone exposure as mentioned earlier because8 O8 V0 r' G7 F% X2 R: g( e
the exposure was not for a prolonged period of time. }2 K1 Z9 V% m1 K+ X% L( H/ P
Although the bone age was advanced at the time of! Q' G2 M$ i0 |+ N% L1 K9 D
diagnosis, the child had a normal growth velocity at: K1 e$ [) \1 A, i! Y8 X
the follow-up visit. It is hoped that his final adult0 N$ k0 d6 H. {! v' s' S" Z# `7 v
height will not be affected.2 L! B, J% T* ]& ?7 p, t
Although rarely reported, the widespread avail-* v6 z9 e. R" @! m& M7 \
ability of androgen products in our society may
+ o% g1 y0 c2 ?+ tindeed cause more virilization in male or female# b) @8 d) w8 g: S& w# e! x' K. w
children than one would realize. Exposure to andro-; W! d8 g4 Q5 K5 P8 C% ~
gen products must be considered and specific ques-& W# \# B% ], }7 W, @, t
tioning about the use of a testosterone product or& x* h2 M6 T0 G/ f
gel should be asked of the family members during
6 I/ V; @. N. B' x& q/ a: @the evaluation of any children who present with vir-4 g3 ^( k/ \4 C! |+ z
ilization or peripheral precocious puberty. The diag-7 d7 g& Y( F2 T. p" r
nosis can be established by just a few tests and by y2 J) e5 D: F, A5 B+ V5 G" c& S) H
appropriate history. The inability to obtain such a D+ [6 P! a }: H4 F8 P; e) A8 x' u" z
history, or failure to ask the specific questions, may! K( P- B2 ` O! n% ~
result in extensive, unnecessary, and expensive# t2 l8 z9 S7 a/ W) q' i
investigation. The primary care physician should be
2 t3 [- u1 n' w* d/ }5 k0 L/ {: E; raware of this fact, because most of these children
1 l9 O7 y c$ h& A omay initially present in their practice. The Physicians’
0 Z& x. e/ W$ `+ R+ i7 }Desk Reference and package insert should also put a
* c( ?( b+ J* [; `+ X* E$ Hwarning about the virilizing effect on a male or
& g' E4 i' l9 Wfemale child who might come in contact with some-7 W1 z+ ?7 ]. x. z
one using any of these products.
2 A+ h' }" ^) |& ]0 H3 cReferences. v0 |, S1 ]- N+ n/ d' M- J
1. Styne DM. The testes: disorder of sexual differentiation
) Q( K, {2 j7 g% Y: J2 _, o) x) band puberty in the male. In: Sperling MA, ed. Pediatric2 e$ ]0 `4 b- n8 l% `
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
- w: i6 Y# h r% E2002: 565-628.) Z- v' {9 \( q
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious# O6 B! Z: ]# S# V% u
puberty in children with tumours of the suprasellar pineal
) E P: y2 q6 \at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) L: `9 g! ?* r6 H6 V
Topical Testosterone Exposure / Bhowmick et al 5437 c! Z I. m& s% S8 [9 V
areas: organic central precocious puberty. Acta Paediatr.
/ J7 L: U: ^$ x5 j$ T* ^+ S2001;90:751-756.
" p4 M. j7 w6 K& F, ]/ o3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
* L y4 e% y* {# n8 DPediatric Endocrinology. 4th ed. New York, NY: Marcel; H$ A$ B9 [6 l+ `
Dekker Inc; 2003:211-238.
. m- z0 j# I- d- Y+ U2 H4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual0 z8 X% r6 F1 a; ~ B4 q; b9 H- `
development in a two-year-old boy induced by topical
' @ t' D6 j: G, C: sexposure to testosterone. Pediatrics. 1999;104:e23.; o, t* v" ~/ p1 d) B+ W
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of7 r' F# ~% P% Y. D e8 C6 L5 P M
Skeletal Development of the Hand and Wrist. 2nd ed.
( D- `5 ]2 d m' `Stanford, CA: Stanford University Press; 1959.
) I# A, T, l: Z/ G% U$ p6. Physicians’ Desk Reference. Androgel 1% testosterone,
6 u G, U3 ?4 YUnimed Pharmaceutical Inc. Montvale, NJ: Medical
, h" I W# x: o( R4 ?3 f* bEconomics Company, Inc; 2004:3239-3241.
9 e- Q! Z& _1 b7. Klugo RC, Cerny JC. Response of micropenis to topical; Q7 @& d" q) W$ e1 R3 Y. H
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