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is a significant concern for physicians. Central
) t5 B: |& O: O1 B; Qprecocious puberty (CPP), which is mediated
e% _ U3 S# s9 H/ sthrough the hypothalamic pituitary gonadal axis, has8 l6 A) Y' K$ E0 J4 \* g
a higher incidence of organic central nervous system: X5 s! `" c' b5 u3 o3 v& U' L
lesions in boys.1,2 Virilization in boys, as manifested7 I* M* x2 d6 M
by enlargement of the penis, development of pubic# j9 P% z/ I" D! c G
hair, and facial acne without enlargement of testi-
5 B0 @8 m7 W1 ^* W3 vcles, suggests peripheral or pseudopuberty.1-3 We
* D* D: Y6 J4 h Y/ K2 Y% Breport a 16-month-old boy who presented with the& m+ B# R3 }+ _! E- x
enlargement of the phallus and pubic hair develop-" T& L/ N n2 ]+ V% B/ d( {) N
ment without testicular enlargement, which was due
0 p* i o+ k8 d8 F* t5 |to the unintentional exposure to androgen gel used by
" K6 P8 I! |$ U$ C1 c1 S! o y: Wthe father. The family initially concealed this infor-
$ g l* [ ]8 V4 F* s: b8 ^mation, resulting in an extensive work-up for this0 {" o. o& `( S
child. Given the widespread and easy availability of( V0 l) G# V @/ ]
testosterone gel and cream, we believe this is proba-. N, T7 F) ]+ K5 \, q% S0 ^0 m
bly more common than the rare case report in the
, U8 J S' G' L9 I, Uliterature.4
2 g( T7 {- U3 `0 R; t# x3 a8 _ }2 b" qPatient Report
0 ]: T7 e' Q+ ?3 i5 N; T2 V9 l: EA 16-month-old white child was referred to the* j# Q- X/ `& L* J
endocrine clinic by his pediatrician with the concern
_$ |: S, l$ f& @% E4 Cof early sexual development. His mother noticed
- {8 K- i7 ]1 _' Z! z8 Slight colored pubic hair development when he was) {+ H4 r4 B. [# U5 E& J
From the 1Division of Pediatric Endocrinology, 2University of' ?, B$ N; \4 {7 O8 g8 z2 S& g
South Alabama Medical Center, Mobile, Alabama., ?& O2 Z* C9 m: W4 m+ ?
Address correspondence to: Samar K. Bhowmick, MD, FACE,
8 X! v! i, ^: @4 I: W$ y+ M; U2 i* dProfessor of Pediatrics, University of South Alabama, College of
3 q# i4 R- N* S6 c1 P1 YMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
, _$ _8 z! \% W/ }* K" Ue-mail: [email protected].: n; K! W; T# c# ^' F: L
about 6 to 7 months old, which progressively became
/ c0 M: m) } Zdarker. She was also concerned about the enlarge- _" s- Y( ? V* {; [: n; \
ment of his penis and frequent erections. The child( @3 U8 V) d9 l2 O9 Q+ t+ {$ {. v/ |
was the product of a full-term normal delivery, with" |; T- c5 s! s4 j% t$ m
a birth weight of 7 lb 14 oz, and birth length of) {% }. }4 \+ x9 |# s! B! q
20 inches. He was breast-fed throughout the first year
6 g3 H/ v* `) ?1 I T/ xof life and was still receiving breast milk along with. T1 N+ K- U% O2 }% I! s8 I ?
solid food. He had no hospitalizations or surgery,
& Z/ y: |, J- Y X4 s) l) Kand his psychosocial and psychomotor development0 B9 y( |# v" A' l1 p y
was age appropriate.4 c3 G. Q( T% t) r* ]
The family history was remarkable for the father,+ O" ]" t* o' F/ n) l! Q p
who was diagnosed with hypothyroidism at age 16,* f' y- C( M* H* J% l9 d
which was treated with thyroxine. The father’s
8 \. f3 f) `# i# Dheight was 6 feet, and he went through a somewhat
- I' j5 R5 V. ?! ~early puberty and had stopped growing by age 14.0 Z0 g4 J; o4 U( w- s
The father denied taking any other medication. The
) w7 t! c0 s. n+ K7 \child’s mother was in good health. Her menarche( f U' w0 g4 K7 s2 b, Y
was at 11 years of age, and her height was at 5 feet
4 @+ C. ]8 i/ U; M7 `1 f* G5 inches. There was no other family history of pre-0 E" j% Q9 v! a4 Q9 E* o
cocious sexual development in the first-degree rela-; i2 B! c; C, C j( ^
tives. There were no siblings., S k9 ?0 W! @5 ?) ^; f- B, G
Physical Examination
0 y& B1 F7 e+ [) A9 G% b8 mThe physical examination revealed a very active,6 P: r8 R; t3 B7 w( u" a0 H% ~7 }
playful, and healthy boy. The vital signs documented
; s3 S( r; w& Ha blood pressure of 85/50 mm Hg, his length was0 x) U6 m' A7 g3 q1 x
90 cm (>97th percentile), and his weight was 14.4 kg9 h/ I3 f h. P2 ?: ]9 @
(also >97th percentile). The observed yearly growth9 n9 a4 G4 u9 X3 y4 p, y
velocity was 30 cm (12 inches). The examination of) l0 U& u6 p! r
the neck revealed no thyroid enlargement.# I5 c3 r! m1 i5 h, C
The genitourinary examination was remarkable for
% {) `9 W3 L" P/ }) Denlargement of the penis, with a stretched length of
$ s6 e6 u. s5 K+ A" I8 cm and a width of 2 cm. The glans penis was very well
! B, P. e w' V) W$ k, Ndeveloped. The pubic hair was Tanner II, mostly around
) G( a' D3 I! ]! [7 p, x1 c5401 u: p' o& G6 J$ M* w6 z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 @5 ` v$ _7 lthe base of the phallus and was dark and curled. The
" s) p( ]: ]2 B1 o! w( w( atesticular volume was prepubertal at 2 mL each.0 P& M4 r! _" X3 o! e
The skin was moist and smooth and somewhat
$ W! w% L V+ W& e% @5 w- @! Goily. No axillary hair was noted. There were no: \/ N& u3 r4 o
abnormal skin pigmentations or café-au-lait spots.# o7 H: H) k) |8 ?' k" b
Neurologic evaluation showed deep tendon reflex 2+
3 E- V0 v; U/ ~; W- ^bilateral and symmetrical. There was no suggestion8 @0 N" h2 R, u! G
of papilledema.' `% H0 j. e# ?, K3 |$ f
Laboratory Evaluation& T1 ?: u+ K! n9 D D
The bone age was consistent with 28 months by
+ D l, g4 g( z* P. qusing the standard of Greulich and Pyle at a chrono-9 H8 A7 U1 f, {3 i9 R
logic age of 16 months (advanced).5 Chromosomal' R) i4 |/ R8 |2 }7 u/ K
karyotype was 46XY. The thyroid function test
( p W7 p. V! }5 W" N" F: Zshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
+ Z4 l3 c6 z |0 i! J- N7 slating hormone level was 1.3 µIU/mL (both normal).
' h* S6 C# g. o. S% lThe concentrations of serum electrolytes, blood
4 l9 p4 Q9 {+ ]. d3 K& e. ^5 g2 murea nitrogen, creatinine, and calcium all were, c+ E. d, G4 g t6 A M, k
within normal range for his age. The concentration
9 D4 h0 w4 n4 X. fof serum 17-hydroxyprogesterone was 16 ng/dL
9 L1 |0 H* b: a3 A(normal, 3 to 90 ng/dL), androstenedione was 20
: ?" t5 G9 U; b: Eng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-) l! p1 w8 {& n R
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
% n5 }2 y% q: o9 n" Z wdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
l) Q+ G# V" ~" ~. \49ng/dL), 11-desoxycortisol (specific compound S)
" N2 L: d3 c* m9 G2 ~" t owas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-. ]/ |7 M; y$ }$ I; r
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
/ g* J- a/ U6 L; ]. v- `8 P( ^testosterone was 60 ng/dL (normal <3 to 10 ng/dL),, P- c9 G: Y* X% M
and β-human chorionic gonadotropin was less than9 S( q* e$ \/ C* P4 ^
5 mIU/mL (normal <5 mIU/mL). Serum follicular
" `+ P E1 \5 I5 _! J, @stimulating hormone and leuteinizing hormone
0 ]3 j% L5 v* e; x9 hconcentrations were less than 0.05 mIU/mL
4 }: k2 t9 ?% J( I% n(prepubertal).
. |. o- B6 f# `0 M- [: s, YThe parents were notified about the laboratory
, \* Z7 A! X. ^0 }% A. @9 Eresults and were informed that all of the tests were9 A. ~# y/ n7 Z# q( \
normal except the testosterone level was high. The% s0 X% I# q0 V7 T! u9 q5 v
follow-up visit was arranged within a few weeks to
- E; I" G. K; b( w: h3 zobtain testicular and abdominal sonograms; how-
/ n$ H4 L9 s0 {; X* B/ Hever, the family did not return for 4 months.1 D1 w' [' H% O
Physical examination at this time revealed that the
& d) w1 r) ?" Q; ]4 Z) I* s3 Dchild had grown 2.5 cm in 4 months and had gained
! b6 w' u- U p$ t- y4 c3 X2 kg of weight. Physical examination remained/ k* p! H7 m+ p5 e3 N3 f% K# {/ B7 D0 n
unchanged. Surprisingly, the pubic hair almost com-/ G, ]# i, c) l( m7 M! K: a: O
pletely disappeared except for a few vellous hairs at7 Z7 }+ D) Y: ~! M7 Q, K' ?/ R
the base of the phallus. Testicular volume was still 2* ^) b* ?6 p4 h1 U7 x
mL, and the size of the penis remained unchanged.. d c2 `6 V6 `; [% m% a
The mother also said that the boy was no longer hav-3 V l {& Z, ^1 t, W, v2 d% V
ing frequent erections. u, F; S$ a1 A; [8 Z4 C
Both parents were again questioned about use of8 h1 B; H u B1 ?
any ointment/creams that they may have applied to
& a0 m6 c3 R0 z& K- [- xthe child’s skin. This time the father admitted the
2 u( {3 ?( q1 ]- `Topical Testosterone Exposure / Bhowmick et al 541 u- }7 E* M9 C* s
use of testosterone gel twice daily that he was apply-
$ W9 I6 \8 _& ving over his own shoulders, chest, and back area for% s5 k7 I, n! w/ C: Z6 r8 V
a year. The father also revealed he was embarrassed1 V5 @( D1 r: W0 H7 a
to disclose that he was using a testosterone gel pre-
: w; v' A% X# H' }scribed by his family physician for decreased libido) g7 A1 w, E$ ?
secondary to depression.8 q( Q. B0 c" B j1 `
The child slept in the same bed with parents.9 r! {. s* K. f, _( e
The father would hug the baby and hold him on his6 C. f% J, {; a( V& E( v
chest for a considerable period of time, causing sig-
/ k8 V& t X$ ]nificant bare skin contact between baby and father.6 S( v- A" m( K$ |' N& I
The father also admitted that after the phone call,- ]" ^9 d. N& \; F& l D$ R# ^
when he learned the testosterone level in the baby
2 {6 h$ N9 }, t, U: f& f6 K* Hwas high, he then read the product information
7 s2 ?% e, L! g, b. \. ?0 tpacket and concluded that it was most likely the rea-
" c' D' ^4 @6 X; ^4 O n5 kson for the child’s virilization. At that time, they
2 u: v. n# B; {6 N$ wdecided to put the baby in a separate bed, and the
l" P% g" m1 J. Q( H9 ofather was not hugging him with bare skin and had( x/ m p( Y7 D( ]" u
been using protective clothing. A repeat testosterone( R8 x8 S B4 a8 ]* @6 j1 P7 j
test was ordered, but the family did not go to the: H! w8 D2 O) P; d$ {( S
laboratory to obtain the test.* j# }/ \4 h; }; A ~3 {
Discussion" q1 k9 e) s2 b* u% ~$ L$ y6 H
Precocious puberty in boys is defined as secondary8 j+ x/ V5 ~2 C
sexual development before 9 years of age.1,4! g/ ~. ~( d2 @! X( V4 R6 P+ l
Precocious puberty is termed as central (true) when2 [0 ^2 w6 n" b- @& s. y
it is caused by the premature activation of hypo-
( G& a/ [- S9 l6 V' t bthalamic pituitary gonadal axis. CPP is more com-2 F) d5 q$ c0 s5 s
mon in girls than in boys.1,3 Most boys with CPP
2 f8 E/ S" C- Wmay have a central nervous system lesion that is
l! s: ]% `( N6 J) Lresponsible for the early activation of the hypothal-+ \) k! ]; m* N) y ~3 Y
amic pituitary gonadal axis.1-3 Thus, greater empha-! I' b9 o5 y; L5 T. T/ `" z3 P
sis has been given to neuroradiologic imaging in
( b4 c/ v. P K( {7 A2 {2 Sboys with precocious puberty. In addition to viril-% X/ h6 n& d5 k% C: r
ization, the clinical hallmark of CPP is the symmet-% f& ^! w2 ~% y5 d
rical testicular growth secondary to stimulation by9 X) q' K3 R3 n
gonadotropins.1,3/ Z c. m$ Q- j' c _
Gonadotropin-independent peripheral preco-- x3 f. R' s% {& t+ y8 f) o
cious puberty in boys also results from inappropriate7 H" j7 _3 L% X" Y* m( D$ o. I2 k$ T
androgenic stimulation from either endogenous or
W7 V5 u) E; Y/ M/ V% X& \. X! T" Bexogenous sources, nonpituitary gonadotropin stim-
9 Z/ S) x/ M) ~( G3 rulation, and rare activating mutations.3 Virilizing
: z7 h9 j* |0 u1 H4 Fcongenital adrenal hyperplasia producing excessive
N; R+ R' q: |adrenal androgens is a common cause of precocious" @# o+ f+ b. g o( L7 o& S1 @
puberty in boys.3,4
: J: @1 i9 T' q2 }; g9 A( NThe most common form of congenital adrenal
! H6 l- b5 y5 X9 o4 \$ N% b( }7 Ihyperplasia is the 21-hydroxylase enzyme deficiency.
* S: S9 A/ v8 w3 x) N2 ZThe 11-β hydroxylase deficiency may also result in
+ k4 G" f1 V- c/ [8 h2 x7 gexcessive adrenal androgen production, and rarely,' y9 p/ B9 B# {) s+ H+ f
an adrenal tumor may also cause adrenal androgen
- Z0 \7 ], Y/ d u( m- p0 z: d Nexcess.1,3* S. v4 g- B/ J6 o; r) o: R0 }
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
% `! K! x! R4 |/ s542 Clinical Pediatrics / Vol. 46, No. 6, July 20072 T1 m6 r F$ ]& O7 o
A unique entity of male-limited gonadotropin-# Q8 K+ I. j7 s
independent precocious puberty, which is also known
4 ^% o7 u( y" c6 Y; t/ V5 W6 Fas testotoxicosis, may cause precocious puberty at a0 W# \: v( n3 z
very young age. The physical findings in these boys
3 m% a9 g1 C6 D4 S! Wwith this disorder are full pubertal development,
/ H$ Q/ u& j j, dincluding bilateral testicular growth, similar to boys
8 i1 e4 L* G; M m$ I Nwith CPP. The gonadotropin levels in this disorder
2 D6 A$ t/ M3 B4 I4 q, _2 C7 bare suppressed to prepubertal levels and do not show
8 o8 ^9 w Q y E8 J4 |pubertal response of gonadotropin after gonadotropin-
# C1 [# r( E8 O( @1 H- Rreleasing hormone stimulation. This is a sex-linked
5 N7 @6 z1 Q5 y) F! T6 q4 l8 i% Yautosomal dominant disorder that affects only' j* U( S7 ~1 Q# P
males; therefore, other male members of the family
# @6 T: F5 G* _5 R$ j- j* s) nmay have similar precocious puberty.3 b( x/ ?- A# ^# l m$ P
In our patient, physical examination was incon-; G9 d& O% Z: a, V+ h
sistent with true precocious puberty since his testi-
1 k, @5 `. w+ L3 xcles were prepubertal in size. However, testotoxicosis7 k/ C v/ h) }# |9 Q
was in the differential diagnosis because his father
% ~! p8 m' k/ h' o% S+ astarted puberty somewhat early, and occasionally,
@/ F; o4 u- h; n9 n1 O$ `' a8 Gtesticular enlargement is not that evident in the% q6 _- X P# z, p) }
beginning of this process.1 In the absence of a neg-
W$ k3 k/ n" L( |ative initial history of androgen exposure, our
2 C! W. \. r/ D: p; sbiggest concern was virilizing adrenal hyperplasia,
: b9 Q7 J0 Z# ?: O5 W6 w Seither 21-hydroxylase deficiency or 11-β hydroxylase
V- M5 ?/ Q5 ^deficiency. Those diagnoses were excluded by find-
! R( R, {* j8 @0 Fing the normal level of adrenal steroids.' S0 w" e6 U& h. n
The diagnosis of exogenous androgens was strongly
, _( f3 L+ t8 G) j5 qsuspected in a follow-up visit after 4 months because
9 N2 |4 d. `6 j) pthe physical examination revealed the complete disap-! |$ W/ x1 F" s9 U3 s0 N, `
pearance of pubic hair, normal growth velocity, and
4 ^3 o: P$ o$ }) adecreased erections. The father admitted using a testos-: s! g7 m3 U7 M: n
terone gel, which he concealed at first visit. He was1 Y+ f; n1 ~) I+ F; I
using it rather frequently, twice a day. The Physicians’3 F* a/ ]; p6 m. ]" w
Desk Reference, or package insert of this product, gel or# T& _4 [8 a; r% A0 H1 j
cream, cautions about dermal testosterone transfer to. G5 M+ X- m& V
unprotected females through direct skin exposure.
; z5 G2 V# a1 Q8 Q0 sSerum testosterone level was found to be 2 times the( i/ I8 p6 v- S9 J
baseline value in those females who were exposed to
5 o3 h. i; `) o# S; a" zeven 15 minutes of direct skin contact with their male7 O! a6 { t0 | w% |
partners.6 However, when a shirt covered the applica- _$ F: _- x6 \( a! v$ H! _3 s
tion site, this testosterone transfer was prevented.! `. m7 u5 n$ `6 e7 v
Our patient’s testosterone level was 60 ng/mL,: c' P( {% H: U2 R* k, z; c
which was clearly high. Some studies suggest that4 _) V* Y" B. B4 {0 ~ o
dermal conversion of testosterone to dihydrotestos-
5 E" N. H n' D& P8 z- b9 @terone, which is a more potent metabolite, is more% e3 ^7 e4 l# k" O' p& a
active in young children exposed to testosterone* ?$ ^" s- k3 I$ N9 y: g2 N
exogenously7; however, we did not measure a dihy-
6 P' V) B1 o+ A; vdrotestosterone level in our patient. In addition to
! E, P8 W' c0 W* l. @1 e7 q6 f8 bvirilization, exposure to exogenous testosterone in: X! I9 x& b: p2 Z. o3 A' }
children results in an increase in growth velocity and9 G- b( \/ v5 S& \6 K+ ^6 S k8 {
advanced bone age, as seen in our patient.
7 w7 U2 w. h& y" S8 k: w+ qThe long-term effect of androgen exposure during, Z& U1 g, ]6 z6 h: ^) @
early childhood on pubertal development and final! a, T6 W1 U# o. T
adult height are not fully known and always remain
& J$ b9 R% m# n0 w& i- ka concern. Children treated with short-term testos-
2 G: l0 }1 {( R: n) ]3 r6 wterone injection or topical androgen may exhibit some) E$ t# j; u& c# w* U
acceleration of the skeletal maturation; however, after. J; f* n+ B- F
cessation of treatment, the rate of bone maturation0 u+ O2 l. T8 W2 t! }4 R; o
decelerates and gradually returns to normal.8,9 I; M& J0 d" K8 M5 z; G& e
There are conflicting reports and controversy* E2 u: }, ^( n% W
over the effect of early androgen exposure on adult9 x7 |6 `% z, h% } U/ @% b& C
penile length.10,11 Some reports suggest subnormal
% r5 r- p8 G' J% c9 \adult penile length, apparently because of downreg-
- ]* u+ v w; z h- D e! j/ J" `ulation of androgen receptor number.10,12 However,
% u ~" m& h5 tSutherland et al13 did not find a correlation between B# `) F0 p$ C7 o- i8 V
childhood testosterone exposure and reduced adult
/ H- @% M. |" j: X5 C$ v8 X, e& Lpenile length in clinical studies.8 N" ]7 j6 M. J6 J
Nonetheless, we do not believe our patient is
. L5 h1 g6 y- _6 {1 X6 z, u1 \( Tgoing to experience any of the untoward effects from
7 O* [& K+ h I1 e" ^3 ~: c9 k4 t/ \testosterone exposure as mentioned earlier because
{$ z* X' } F8 w, l7 A2 I# @the exposure was not for a prolonged period of time.
6 X8 ?3 ]/ _! [6 q! r4 ~Although the bone age was advanced at the time of
! c. c' k0 B7 G' D" e( C8 j ]diagnosis, the child had a normal growth velocity at/ L& D& ^, E$ ?; b' f# j9 y
the follow-up visit. It is hoped that his final adult" |8 e0 c" r6 |5 ?1 X% i& _
height will not be affected.
8 J. b6 k6 }3 JAlthough rarely reported, the widespread avail-* U! e! z0 A7 \5 `2 I+ j( w
ability of androgen products in our society may( A# m- `6 p- \1 P
indeed cause more virilization in male or female
" i' p/ h3 k9 J# A+ Q4 [6 [children than one would realize. Exposure to andro- n2 l$ g' Z7 I5 E# R
gen products must be considered and specific ques-
3 p% x+ l9 q0 o5 [& k& btioning about the use of a testosterone product or
- |+ [' [$ _5 ], x3 x, @gel should be asked of the family members during7 L3 j$ @5 _3 ] X0 G+ i
the evaluation of any children who present with vir-
z' h1 c! d5 F6 d! o' @ilization or peripheral precocious puberty. The diag-! J( C" n* S/ A$ Z& `# V
nosis can be established by just a few tests and by2 u/ F5 m. ^: T$ V4 q1 a2 _( x d
appropriate history. The inability to obtain such a
; [- U4 {+ e& w6 R+ whistory, or failure to ask the specific questions, may
& v& ~' M$ J% j' k6 U- Gresult in extensive, unnecessary, and expensive
9 e% ~) r! O& |) Ninvestigation. The primary care physician should be! [$ w+ h, D! [5 _: ^9 m5 G& |
aware of this fact, because most of these children N& {6 Z0 [* l2 j8 T
may initially present in their practice. The Physicians’
* g# x/ S% K, r5 C9 N: ]7 A g7 N8 fDesk Reference and package insert should also put a
' t8 _3 f7 [# |/ mwarning about the virilizing effect on a male or
( {! x5 ]( d! Vfemale child who might come in contact with some-
+ x4 d3 G8 b" J' ^one using any of these products.
. e" U5 Q+ y2 |5 v: A3 OReferences
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$ d0 o ^* A# ~6 ?6 E9 q! @2002: 565-628.6 D( n; ~/ K! j9 z4 X* v- K, B
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
' X2 J3 d5 ?+ D/ cpuberty in children with tumours of the suprasellar pineal
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$ {" D( Q7 J. {, ?areas: organic central precocious puberty. Acta Paediatr.
0 ?! {5 [5 f. p9 y w2001;90:751-756.
- O5 \/ G) _7 e# ~1 I3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.6 o& [* H6 u6 Z- B& @
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
- Q) J) F" W$ s' FDekker Inc; 2003:211-238.. e/ J" Y3 g3 F; E5 h. o) p
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
: a3 L) ]* D; C4 P- y0 |development in a two-year-old boy induced by topical
& J# S0 F" J8 b3 M/ nexposure to testosterone. Pediatrics. 1999;104:e23.
- a6 N) t. e5 t' j3 i5. Greulich WW, Pyle SI, eds. Radiographic Atlas of" G! Y8 ~/ I9 d
Skeletal Development of the Hand and Wrist. 2nd ed.& N" h2 ~/ ^3 k' j" E
Stanford, CA: Stanford University Press; 1959.
: z y3 z1 K% ?; I6. Physicians’ Desk Reference. Androgel 1% testosterone,
' B [. b! k. i& c. l: \* }( F% NUnimed Pharmaceutical Inc. Montvale, NJ: Medical T& U$ H# {$ O7 Q3 n2 ]
Economics Company, Inc; 2004:3239-3241.
5 Q6 b k8 f6 _: |+ @7. Klugo RC, Cerny JC. Response of micropenis to topical1 T/ d( }8 | V+ @3 R. U
testosterone and gonadotropin. J Urol. 1978;119:( G/ y8 i) J- x& R: i
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