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is a significant concern for physicians. Central' E7 k5 V" A. }( I1 w4 n
precocious puberty (CPP), which is mediated
5 M4 U9 ~, `& z; A4 d/ r: Z ythrough the hypothalamic pituitary gonadal axis, has/ G. I, s2 @9 n+ S+ ^7 o
a higher incidence of organic central nervous system
% Q0 u& u# d! K2 t( \* T+ I3 [; Tlesions in boys.1,2 Virilization in boys, as manifested" I* I! f. ~3 g- ^( X
by enlargement of the penis, development of pubic
+ F# Y z W. M' Thair, and facial acne without enlargement of testi-
- h% F6 X/ ^1 m) |' H8 @; w+ \cles, suggests peripheral or pseudopuberty.1-3 We
6 o6 a* _1 B+ ]! `report a 16-month-old boy who presented with the( i2 y, |" N! Z" p: _7 e; {3 d
enlargement of the phallus and pubic hair develop-
8 d! Q4 O1 g* i1 _( Rment without testicular enlargement, which was due2 U2 d# p0 r1 J3 V% `" {
to the unintentional exposure to androgen gel used by
1 _# c0 i0 h) R! d# ^* B, F& jthe father. The family initially concealed this infor-5 R# G( T( _+ h! q9 {; L) j; d' S
mation, resulting in an extensive work-up for this9 u1 M/ m0 A! `, X$ f
child. Given the widespread and easy availability of+ b. M5 U# A3 u& i5 q6 Y
testosterone gel and cream, we believe this is proba-
/ \% j3 y9 _5 i& p* Q- d* ^" Y/ e8 Ubly more common than the rare case report in the
9 k- ?+ I- e5 |" ?" Pliterature.4
& U0 O! h4 q- y2 x9 GPatient Report4 K3 A# T: R2 ]- C5 O: S
A 16-month-old white child was referred to the
) K& W$ x+ _. ^0 u' u0 a0 ]6 Eendocrine clinic by his pediatrician with the concern; ^$ ]' X! R, k# ^
of early sexual development. His mother noticed" a5 W& ]7 i% P5 G$ ~
light colored pubic hair development when he was
' c1 b; B; z/ qFrom the 1Division of Pediatric Endocrinology, 2University of; e/ z h5 f, }+ U, c9 A
South Alabama Medical Center, Mobile, Alabama.
9 b# L" d4 v8 HAddress correspondence to: Samar K. Bhowmick, MD, FACE,
9 \: \9 \: W% ]; O" FProfessor of Pediatrics, University of South Alabama, College of
, F/ P* [' A3 M0 B1 XMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
' B3 m( X* D% c/ k! ?) ]% Ve-mail: [email protected].
0 l( k7 q9 s9 i! iabout 6 to 7 months old, which progressively became
~% R7 k! G# H: v. Tdarker. She was also concerned about the enlarge-
$ U, o1 v* u6 g H1 m# C6 D Z9 l; Qment of his penis and frequent erections. The child
: d1 Z% @2 K0 I# Iwas the product of a full-term normal delivery, with% P7 W- ]2 @" p9 d4 M
a birth weight of 7 lb 14 oz, and birth length of
) l3 b& K. U$ L+ x* z8 x: t. P$ j8 Z20 inches. He was breast-fed throughout the first year
( m( i( j4 ^& p+ ?of life and was still receiving breast milk along with
4 ]* P3 c% b& m- x# V% \solid food. He had no hospitalizations or surgery,
4 D2 c* I2 M8 `8 C1 t5 Sand his psychosocial and psychomotor development
" b% K& m7 H. X* Jwas age appropriate.
; d4 t1 y3 `$ E# D1 a! K mThe family history was remarkable for the father,
+ }% P4 q# x, zwho was diagnosed with hypothyroidism at age 16,: W! ?# @9 Y* O, x: A5 k% e j
which was treated with thyroxine. The father’s5 \) _4 Z# j* m3 w" K
height was 6 feet, and he went through a somewhat8 ]$ G! K0 ?6 O3 U% S
early puberty and had stopped growing by age 14.# @% L6 f& ~/ p5 G8 i$ M
The father denied taking any other medication. The, Y' T" k0 {0 O0 G: j4 H! I3 P
child’s mother was in good health. Her menarche
; U7 ~8 |2 E7 c8 t% s6 U0 Kwas at 11 years of age, and her height was at 5 feet
4 O( M2 n8 y2 [+ C! b5 inches. There was no other family history of pre-
2 }3 J0 f9 z9 ~& ~cocious sexual development in the first-degree rela-
- f$ X8 R; m5 X% o; E/ Qtives. There were no siblings.
6 D) Q6 x* S9 H: W3 M% U( LPhysical Examination0 q: K4 G- s7 t
The physical examination revealed a very active,8 K8 }0 g/ x ]& L# j
playful, and healthy boy. The vital signs documented
! k' m1 O7 V D' O7 Ga blood pressure of 85/50 mm Hg, his length was
" r, \7 u/ f7 T; e! s90 cm (>97th percentile), and his weight was 14.4 kg& x1 l+ R- P* A* |7 K
(also >97th percentile). The observed yearly growth6 _# M: a# A2 A" p
velocity was 30 cm (12 inches). The examination of$ b/ c1 j% T' b# R0 u9 u1 q
the neck revealed no thyroid enlargement.
2 x" k; _$ t. U3 g8 h3 iThe genitourinary examination was remarkable for
2 q+ X1 k0 T3 B8 G eenlargement of the penis, with a stretched length of9 j6 Y# z& i4 n" D" `
8 cm and a width of 2 cm. The glans penis was very well. q* y, y# ^, T8 ]
developed. The pubic hair was Tanner II, mostly around" W! v |, l" K8 @; @+ @
540
' ]+ @4 `1 s- Cat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from [; @0 H; G$ U" i* U
the base of the phallus and was dark and curled. The( H/ x3 I2 u1 u- ~
testicular volume was prepubertal at 2 mL each.! H% b0 Q* g( Y/ j: T( w
The skin was moist and smooth and somewhat
/ ^( b1 A2 b, v7 voily. No axillary hair was noted. There were no4 j" L! g" M! a! U( F& [
abnormal skin pigmentations or café-au-lait spots.
4 q4 t2 C6 d, S& GNeurologic evaluation showed deep tendon reflex 2+
3 F9 g3 i) ?/ c! a: Obilateral and symmetrical. There was no suggestion1 `1 j$ @; _% b. {& \
of papilledema.
; G) \4 g6 s4 j8 Q6 `+ D7 _) sLaboratory Evaluation
- Z7 |4 m$ n) C$ v# QThe bone age was consistent with 28 months by! T; {2 D/ l* H& k2 S( z8 J
using the standard of Greulich and Pyle at a chrono-
- I% o: G$ G9 N3 n* Plogic age of 16 months (advanced).5 Chromosomal6 A5 Q- J1 ?1 O( e6 s% J
karyotype was 46XY. The thyroid function test
$ Z- A% j, E6 V8 d+ s2 @showed a free T4 of 1.69 ng/dL, and thyroid stimu-
; d4 `; ~/ K. U1 a4 U8 _lating hormone level was 1.3 µIU/mL (both normal).
, z Q$ `$ j$ U! p5 ~The concentrations of serum electrolytes, blood) Z R7 D, g# C+ f6 |! X' b- y
urea nitrogen, creatinine, and calcium all were
& p6 o6 a+ Y( R/ bwithin normal range for his age. The concentration
+ B: ~2 j6 M9 ?# c2 iof serum 17-hydroxyprogesterone was 16 ng/dL v: r- L; e9 _7 Z" f. Q4 f! B
(normal, 3 to 90 ng/dL), androstenedione was 20
; q- G# D# @1 ]* p& k& [( Kng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-4 Y* g" c; Q+ U4 G
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
G. f, K) y- B1 @, m! fdesoxycorticosterone was 4.3 ng/dL (normal, 7 to4 g _" j& ] ]# ?4 }) a9 @
49ng/dL), 11-desoxycortisol (specific compound S)6 A* z( _9 H: E1 k! a
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-4 X7 h; H I8 F/ Y$ s& |
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
6 r5 j) L7 f' p" w3 @& a' Ztestosterone was 60 ng/dL (normal <3 to 10 ng/dL),0 `: y5 M! b# ]/ N1 H
and β-human chorionic gonadotropin was less than- j" h) K" E- N& j+ ^! ]
5 mIU/mL (normal <5 mIU/mL). Serum follicular- H5 F* y: U. h& q
stimulating hormone and leuteinizing hormone
- q. m& N( S# aconcentrations were less than 0.05 mIU/mL7 H4 x& [ [( X
(prepubertal).
|! j( P% O, O+ oThe parents were notified about the laboratory
4 X/ V) F( U5 M; o& h& t$ {results and were informed that all of the tests were
7 A- B) y' D" z. F7 ]4 q* Bnormal except the testosterone level was high. The+ b% @7 i( s) p0 z z
follow-up visit was arranged within a few weeks to
i: [' s! T7 L% b1 nobtain testicular and abdominal sonograms; how-
* V* R& Z) P! S Y; pever, the family did not return for 4 months.. x0 w6 A+ h% @9 _/ f* v4 k
Physical examination at this time revealed that the9 X8 u& I- K, R
child had grown 2.5 cm in 4 months and had gained% _# i! {* `* u% v- y
2 kg of weight. Physical examination remained
# h0 W0 j" ?% }- {! P1 O/ Qunchanged. Surprisingly, the pubic hair almost com-) a4 q% |& o# W5 i1 l" l0 {; m1 O
pletely disappeared except for a few vellous hairs at/ G7 S* R" a- D: I6 e
the base of the phallus. Testicular volume was still 25 r- j1 n+ K' @" q' B
mL, and the size of the penis remained unchanged.
' f4 ?) ]) b4 g5 ]" h# n1 x# w1 ~The mother also said that the boy was no longer hav-& }; x$ ]' C9 v
ing frequent erections.
, k. `) o* g j1 R2 u4 C$ ]Both parents were again questioned about use of0 W J9 n# Q3 X) e6 U
any ointment/creams that they may have applied to
/ V- P Y( N% Hthe child’s skin. This time the father admitted the7 P+ ?7 v( S m6 o: |2 f( e3 [
Topical Testosterone Exposure / Bhowmick et al 541
4 Y/ M- m4 \5 a4 cuse of testosterone gel twice daily that he was apply-! F2 w0 X4 j6 B5 ^3 W8 V/ K
ing over his own shoulders, chest, and back area for
% F8 H, k0 P( [$ j$ R( Oa year. The father also revealed he was embarrassed
2 N; k3 f# e K+ Q9 x6 vto disclose that he was using a testosterone gel pre-) d* i( k$ s& `& ]
scribed by his family physician for decreased libido
4 E7 _2 _% T% e+ p5 p6 J& Ssecondary to depression.) S v( {5 p+ ?7 ?! T. s
The child slept in the same bed with parents.2 u' t! b) p3 k; I7 R# A8 t
The father would hug the baby and hold him on his, [( \" ]/ D) ]' ?' v
chest for a considerable period of time, causing sig-
/ W4 a( I3 |( ^' n6 j0 Snificant bare skin contact between baby and father., q& l, h( i8 w, |
The father also admitted that after the phone call,
. P: Q2 P2 H3 fwhen he learned the testosterone level in the baby
0 d, W* j0 u# G, y: Uwas high, he then read the product information, b/ [7 l! |- e+ z* R# Y
packet and concluded that it was most likely the rea-
} Q% U! ]* Rson for the child’s virilization. At that time, they# z# t. F8 V" m0 Q, t
decided to put the baby in a separate bed, and the
" U Z- ?/ g1 g, efather was not hugging him with bare skin and had# ^/ u5 J1 l( G9 @5 T }+ F, M
been using protective clothing. A repeat testosterone
. \6 D, `+ C! B0 xtest was ordered, but the family did not go to the9 N0 t+ a/ z% ?- k
laboratory to obtain the test.6 ^2 Y& B) N: |7 C: z" t
Discussion+ Z" A8 r! ^6 f/ Y
Precocious puberty in boys is defined as secondary a# d0 h& Y/ A/ ~7 S
sexual development before 9 years of age.1,44 I0 ^: T- k, B' b
Precocious puberty is termed as central (true) when
9 J9 x7 l7 r7 Z! v2 V) sit is caused by the premature activation of hypo-
0 X& M# P S$ T; i! Y1 I1 rthalamic pituitary gonadal axis. CPP is more com-+ g. k9 M" @: j" @' K! D+ S3 N2 H
mon in girls than in boys.1,3 Most boys with CPP1 n1 b/ M0 V9 k
may have a central nervous system lesion that is( r/ |: {3 i8 O, M
responsible for the early activation of the hypothal-: e, ^4 N- Z1 X& ~
amic pituitary gonadal axis.1-3 Thus, greater empha- J3 ~4 T1 t. p2 Z9 R3 X
sis has been given to neuroradiologic imaging in
$ ]9 S/ s: u2 n- g7 |. `; a& bboys with precocious puberty. In addition to viril-1 O, j1 N8 o0 m$ M) t/ M
ization, the clinical hallmark of CPP is the symmet-# ]5 e7 O% ?- |1 `" \, i
rical testicular growth secondary to stimulation by) c; M+ l2 _2 ?) N; Y( ^( {
gonadotropins.1,3
# ?- I4 _3 G8 {8 t) U& RGonadotropin-independent peripheral preco-0 c0 n$ Q% @! J2 k6 U
cious puberty in boys also results from inappropriate$ ^' W; v3 N9 a' O* k7 f0 d
androgenic stimulation from either endogenous or) _' u) w1 J; @8 t0 N
exogenous sources, nonpituitary gonadotropin stim-
% Q! ?' n/ c, F3 [ulation, and rare activating mutations.3 Virilizing
, w9 ?" y# c9 @- Z# n* Econgenital adrenal hyperplasia producing excessive
d) q/ t0 P+ O, y9 T. Vadrenal androgens is a common cause of precocious
; {2 W/ s. u! w1 D" X Qpuberty in boys.3,4
- G& o9 f4 N$ P& f8 c" C2 @( oThe most common form of congenital adrenal$ t1 O X7 S, i- y2 f I
hyperplasia is the 21-hydroxylase enzyme deficiency.
; N6 S R2 S6 U) P dThe 11-β hydroxylase deficiency may also result in
7 f$ I( ^# J% i( N: [excessive adrenal androgen production, and rarely,
! A8 X8 [. h; ^$ j" lan adrenal tumor may also cause adrenal androgen
4 N9 h& m5 H0 O) j* {2 Kexcess.1,3
% ^" O6 q l0 m. ~' i$ U& l9 w8 Kat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from* \5 M& D6 R/ r# }% a* s9 G
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
5 a: }" j& y, D+ \4 ~( }$ cA unique entity of male-limited gonadotropin-
, U0 ?& z/ t8 ]0 Iindependent precocious puberty, which is also known
0 Y7 k A, d a% S9 r/ [1 Yas testotoxicosis, may cause precocious puberty at a# [' N% r4 ~$ Z) N- F' Q
very young age. The physical findings in these boys
+ R1 G/ N* s/ |3 e3 A* ^with this disorder are full pubertal development," q7 |4 z% ^* m$ E2 a$ |
including bilateral testicular growth, similar to boys1 L7 T: H0 W8 z( _
with CPP. The gonadotropin levels in this disorder! q+ \+ z$ H/ B
are suppressed to prepubertal levels and do not show) E% I* w \& o8 T
pubertal response of gonadotropin after gonadotropin-" G1 F8 `, T% ~
releasing hormone stimulation. This is a sex-linked8 c! ?+ f7 a0 n
autosomal dominant disorder that affects only
: N0 k! z' _4 G$ ?. X$ k7 lmales; therefore, other male members of the family
& k- d- o5 j+ [* t1 \0 x/ ymay have similar precocious puberty.3' C5 b! ?2 f; f
In our patient, physical examination was incon-
2 Y7 J, J; J8 u i$ H) g) nsistent with true precocious puberty since his testi-; F) H6 P* Q5 o' \
cles were prepubertal in size. However, testotoxicosis; R* P. b8 n: U# w; l
was in the differential diagnosis because his father
- `% {' V6 X% ^' fstarted puberty somewhat early, and occasionally,
5 W$ q0 c/ z! C2 y# o5 ~testicular enlargement is not that evident in the+ g, j$ d6 c% e' C! Z
beginning of this process.1 In the absence of a neg-4 n. }& R" q- a4 f% W+ d- g6 {
ative initial history of androgen exposure, our# a2 f {1 I- h* u* X" b( j
biggest concern was virilizing adrenal hyperplasia,
4 d5 L& B1 v& w: z/ Yeither 21-hydroxylase deficiency or 11-β hydroxylase; O# u6 C$ r4 d
deficiency. Those diagnoses were excluded by find-2 e4 L7 s- D" l- K6 U& r
ing the normal level of adrenal steroids./ [! U P/ `# k( f- E
The diagnosis of exogenous androgens was strongly
$ G4 L! P, b$ o0 T3 |: zsuspected in a follow-up visit after 4 months because
, ^* N/ N" L3 O1 \the physical examination revealed the complete disap-
, O& W8 Z. Y5 Z- Vpearance of pubic hair, normal growth velocity, and& f+ f" l+ m+ _* l( ^1 n- u
decreased erections. The father admitted using a testos-/ x) a' ^; b# V- B) X
terone gel, which he concealed at first visit. He was* W+ p: S( o5 e
using it rather frequently, twice a day. The Physicians’& u/ `& ~: u, M, I
Desk Reference, or package insert of this product, gel or
. @ |' g+ h3 ~! L$ dcream, cautions about dermal testosterone transfer to
* l/ l" |2 ]1 w) n( m/ J3 \unprotected females through direct skin exposure. D+ l5 J8 j0 p. K# k: ^# _
Serum testosterone level was found to be 2 times the
+ d* Z' e0 f- J5 U9 `: K G7 y( F abaseline value in those females who were exposed to
' u# @+ z, A2 j% {$ X( yeven 15 minutes of direct skin contact with their male6 {+ x! i/ k/ l2 f9 G4 q4 M) E; d
partners.6 However, when a shirt covered the applica-
/ J0 `: T: ^+ E" k. |3 xtion site, this testosterone transfer was prevented.
; b6 i' T& f" @' [$ b+ G4 yOur patient’s testosterone level was 60 ng/mL,
! a( z; l/ Q U+ u2 V% Gwhich was clearly high. Some studies suggest that: V8 R) V( |. N' X
dermal conversion of testosterone to dihydrotestos-
u5 H' ]3 m/ {+ E+ o2 |terone, which is a more potent metabolite, is more
) N6 @4 H# g# r7 D! T7 tactive in young children exposed to testosterone/ _& ?6 I/ |- M- m" k
exogenously7; however, we did not measure a dihy-
" C; @2 S2 O0 ydrotestosterone level in our patient. In addition to
1 a( q. F: z mvirilization, exposure to exogenous testosterone in3 Y+ ], k7 l* o, W! k6 G
children results in an increase in growth velocity and0 E6 h; }' x/ t& N
advanced bone age, as seen in our patient.5 a m9 d3 ^" p: _' T7 ?& U
The long-term effect of androgen exposure during
3 s( m# p! c1 p; k3 f b0 _. U9 F% Pearly childhood on pubertal development and final9 s% h, ~7 ~6 n7 V- M
adult height are not fully known and always remain3 ~: J( F( t! e* w9 W. Y" C
a concern. Children treated with short-term testos-' Q1 f8 X) f8 U" Q m& ^# _
terone injection or topical androgen may exhibit some
4 g6 e" q0 [! K8 Xacceleration of the skeletal maturation; however, after8 A" H; `2 X' A8 r. P
cessation of treatment, the rate of bone maturation
4 R3 T3 i5 P# c5 Cdecelerates and gradually returns to normal.8,9
* }: [: a& Y5 g+ ]# c; g8 `8 P8 UThere are conflicting reports and controversy2 c3 P) y4 o9 H' a8 s* m6 z
over the effect of early androgen exposure on adult
0 `' ?" U, R y, wpenile length.10,11 Some reports suggest subnormal
4 I0 c, ^" |: j8 [* xadult penile length, apparently because of downreg-
7 r- ?3 \6 [, ?% y" g. F: T9 m: o$ ?ulation of androgen receptor number.10,12 However,
* _# ~ ]+ w7 C1 S1 ~8 `Sutherland et al13 did not find a correlation between
. t" ?) E; f r k6 schildhood testosterone exposure and reduced adult: \1 X: \- |( b* `- G' ]2 g
penile length in clinical studies., R* s) `/ i. n5 H- x3 ^
Nonetheless, we do not believe our patient is* y. h! T! i( `$ c/ r
going to experience any of the untoward effects from
8 @7 C$ z! T5 h* O5 l" {7 b& C" n3 htestosterone exposure as mentioned earlier because8 ~ Z+ B: D N" K
the exposure was not for a prolonged period of time.
6 Z1 G2 o( i' W( @# z: q8 ^Although the bone age was advanced at the time of9 u' a! E4 x& Z/ F
diagnosis, the child had a normal growth velocity at, u( X3 m. g6 B6 }- M" J, Z6 z9 J* [5 u
the follow-up visit. It is hoped that his final adult$ M; F' M7 C$ c$ M2 f* s( T/ Z
height will not be affected.) e" D I3 J% b' f+ h! {$ F: B4 @
Although rarely reported, the widespread avail-
1 r- v# D( u5 ]! }ability of androgen products in our society may& Y2 c0 s3 B$ B ^& ^
indeed cause more virilization in male or female2 w& w- g: X O# p+ T+ W# d5 K
children than one would realize. Exposure to andro-9 u t3 Q7 N$ W/ p5 T: r
gen products must be considered and specific ques-
/ M" U; X: G2 J' o5 h: ]/ Ctioning about the use of a testosterone product or
1 ^6 `2 x k& ~gel should be asked of the family members during, {! H( Q x- p
the evaluation of any children who present with vir-7 }6 V5 W7 }* [
ilization or peripheral precocious puberty. The diag-
. r8 w8 k4 J/ o) _& f! ?1 s; }7 Unosis can be established by just a few tests and by; x% G7 _# Q( v$ z+ n% q: V) ~
appropriate history. The inability to obtain such a/ B1 v% q& q! N/ O3 [; E
history, or failure to ask the specific questions, may
5 e! T+ @' z" G( f5 v0 i1 o0 jresult in extensive, unnecessary, and expensive9 n8 v) _/ V0 ^' k
investigation. The primary care physician should be3 K: [% X1 ]1 n! n* B
aware of this fact, because most of these children
/ T7 t" V5 z9 h% E/ E$ emay initially present in their practice. The Physicians’1 B X; r( D1 a8 A* Q
Desk Reference and package insert should also put a
5 z# k$ I4 h3 P4 ^# W" Gwarning about the virilizing effect on a male or* _+ f# d! x( J
female child who might come in contact with some- \1 [9 u. l# `# X% ^$ ~
one using any of these products.9 c l% J0 @; v0 H$ B- M
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;3 f/ G: J$ C! _
2002: 565-628.
2 _% H4 g$ d) F) [1 E: @2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious1 W3 F' i' b$ g8 F% b+ t4 }
puberty in children with tumours of the suprasellar pineal
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Topical Testosterone Exposure / Bhowmick et al 543
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5 F, ?# V& d0 a9 f3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.: ]; `6 G3 c( N* j
Pediatric Endocrinology. 4th ed. New York, NY: Marcel: O' ]5 `( [$ z6 i8 Q! ^2 g+ }: d
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& P6 z: M) k' V) \6 z; S4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual* y) x$ o6 E' E; z X/ m- Q
development in a two-year-old boy induced by topical
4 y* v8 z* k+ P& z G8 [- n" r5 b4 Yexposure to testosterone. Pediatrics. 1999;104:e23.
2 d: o0 @9 g6 _1 m4 ~! `6 n5. Greulich WW, Pyle SI, eds. Radiographic Atlas of/ X. t/ v4 C5 e* ~
Skeletal Development of the Hand and Wrist. 2nd ed.
3 U' S. \# p* W. Z4 E- dStanford, CA: Stanford University Press; 1959.
5 y5 u. m( w( S" _" k H2 ^, _6. Physicians’ Desk Reference. Androgel 1% testosterone,% x; R5 C4 S2 |% j
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
- e* r. W" _+ \0 ZEconomics Company, Inc; 2004:3239-3241.3 h/ t( ~+ v" O- |- r
7. Klugo RC, Cerny JC. Response of micropenis to topical
8 ?4 p0 r, m; l) rtestosterone and gonadotropin. J Urol. 1978;119:
( v6 ~% ? s3 ~# c+ K1 l/ l& q% L667-668.
( h, {7 \. q$ c8. Guthrie RD, Smith DW, Graham CB. Testosterone% k0 t9 R, K* {: w ~7 {4 a
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