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is a significant concern for physicians. Central
/ ?& H* y" R( S- y _4 C- Qprecocious puberty (CPP), which is mediated
, y) B, v. i9 b6 y7 `# F' Nthrough the hypothalamic pituitary gonadal axis, has8 p- q, u/ z) l4 t4 t
a higher incidence of organic central nervous system# Y# h; I" I1 U( g- T
lesions in boys.1,2 Virilization in boys, as manifested, u `$ U1 \. ?2 U
by enlargement of the penis, development of pubic
+ M2 c" H- W e% ] W. ohair, and facial acne without enlargement of testi-+ j3 \0 b( X [ J
cles, suggests peripheral or pseudopuberty.1-3 We
8 T J6 w4 \1 Ereport a 16-month-old boy who presented with the% B: R6 F& O8 A
enlargement of the phallus and pubic hair develop-% y0 W7 z. w c( m
ment without testicular enlargement, which was due
8 T" t! M" T9 N. n4 |$ Qto the unintentional exposure to androgen gel used by
- a* {4 b$ k4 E& ]0 c8 O+ F6 n+ Sthe father. The family initially concealed this infor-( f' ?, _; e$ j* W2 w8 Q5 ~2 I+ B
mation, resulting in an extensive work-up for this
2 P7 E# _1 z! Q1 f; Pchild. Given the widespread and easy availability of
; y% H6 d* R( P0 v: U$ ftestosterone gel and cream, we believe this is proba-9 w9 O, f% e9 p
bly more common than the rare case report in the9 ?: s' r! T% W% v' ]! y' E) ]* Q1 e/ M
literature.4, {$ s# U, b; T' A, E7 y6 m+ ^
Patient Report7 e. t1 q! L9 u- N/ W
A 16-month-old white child was referred to the
6 R$ ^' {+ s0 X$ c" Q Oendocrine clinic by his pediatrician with the concern
; Z7 y, f4 J0 X1 Eof early sexual development. His mother noticed. p0 ]# O" c- [: G' q+ t" U% }
light colored pubic hair development when he was
" s7 l& g$ o) S2 a; L4 u- IFrom the 1Division of Pediatric Endocrinology, 2University of
4 F6 l8 t$ ?: D7 x$ xSouth Alabama Medical Center, Mobile, Alabama." p; D! p2 u$ M I
Address correspondence to: Samar K. Bhowmick, MD, FACE,
6 I: |; m8 ~9 m4 i& lProfessor of Pediatrics, University of South Alabama, College of
9 \3 G: Z* ^6 {3 {: R8 IMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
7 @- w$ K; r0 ye-mail: [email protected].! s3 W8 O5 R5 O; Q
about 6 to 7 months old, which progressively became
n" C4 Z4 `' W7 X% bdarker. She was also concerned about the enlarge- N! D3 ^: H4 r0 f7 W: n1 B: N- k) Q
ment of his penis and frequent erections. The child9 R" n" o* A) }9 ^2 g
was the product of a full-term normal delivery, with
0 `) R; r6 k* A* Ha birth weight of 7 lb 14 oz, and birth length of3 } D X) j' S$ ~: Q4 j5 u
20 inches. He was breast-fed throughout the first year
8 `; x! E: Z+ K% m/ d/ e( Kof life and was still receiving breast milk along with
4 d! ], A* ]' K$ v3 Ysolid food. He had no hospitalizations or surgery,
; B% r4 r5 X- [4 a6 Iand his psychosocial and psychomotor development
3 L* d# |6 i% ?- J, uwas age appropriate.
$ V: D' |! z0 |6 o5 Y3 H a* ZThe family history was remarkable for the father,* ]' A# e" Y5 t' ^) {* W3 P6 ~
who was diagnosed with hypothyroidism at age 16,; H; h, r- C# K# T
which was treated with thyroxine. The father’s0 W4 x3 W' }/ ?, _& J8 A8 q4 n2 r
height was 6 feet, and he went through a somewhat
. A( b1 i! y u7 s! t/ T. h1 R' M) bearly puberty and had stopped growing by age 14.$ t$ s+ {3 M$ e7 U2 o6 _" \% Q
The father denied taking any other medication. The
C) l4 X( q. Z: M- D% w. A9 d' schild’s mother was in good health. Her menarche
, z$ U- m" K4 dwas at 11 years of age, and her height was at 5 feet
( P4 c8 \' v1 z% G5 inches. There was no other family history of pre-: J! r S5 ^+ b
cocious sexual development in the first-degree rela-
# q" p+ ^6 F& `, }/ T- M" ltives. There were no siblings.* _$ L. z# X2 U+ b: N
Physical Examination* S: A/ p; L+ ` G
The physical examination revealed a very active,( [* R, t ?' j1 D8 o
playful, and healthy boy. The vital signs documented
( _2 @4 `* v B! ha blood pressure of 85/50 mm Hg, his length was5 n; { A& ]% P& P
90 cm (>97th percentile), and his weight was 14.4 kg( a" a4 v1 c- T& [. Y9 c
(also >97th percentile). The observed yearly growth0 ]3 |1 E' k9 V# S+ N" v% U, y: m# G
velocity was 30 cm (12 inches). The examination of
% D8 N* `4 m0 `* E* Bthe neck revealed no thyroid enlargement.% }& x6 Y# f+ l4 w1 S% O# Z! A
The genitourinary examination was remarkable for2 s+ e# M3 Z7 A& w
enlargement of the penis, with a stretched length of
: {3 N6 W# M" h, A0 K, a8 cm and a width of 2 cm. The glans penis was very well
) l" |. U, G0 q- A' a/ P* xdeveloped. The pubic hair was Tanner II, mostly around! T$ q }. Y! `4 e) S+ e
5405 P: o" z9 V# [1 P" R
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
2 m: a$ _% ^* lthe base of the phallus and was dark and curled. The
3 Z: w2 t n$ H1 X5 G; Etesticular volume was prepubertal at 2 mL each.7 M; n" z# m7 A" T1 l3 O6 i. A! i
The skin was moist and smooth and somewhat
0 L4 {1 h" o" P: L& M4 roily. No axillary hair was noted. There were no
0 l! d4 y% I2 c6 M8 Q0 F6 Fabnormal skin pigmentations or café-au-lait spots.- ~) c. A& \. ?/ k; {
Neurologic evaluation showed deep tendon reflex 2+& _1 ~8 e1 \! |- F
bilateral and symmetrical. There was no suggestion# V v u- D. X& y
of papilledema.1 \; F4 p* O" s6 b6 O2 ^
Laboratory Evaluation4 @: D: n1 [* x) W! L+ }; |3 W; Z
The bone age was consistent with 28 months by! m8 E ]7 R; x8 Y. |. R
using the standard of Greulich and Pyle at a chrono-
0 c# c/ }) i* ulogic age of 16 months (advanced).5 Chromosomal5 E/ u" M6 w. {2 V
karyotype was 46XY. The thyroid function test
1 w, O: X" ?% ~+ A( I% V7 i6 N3 @showed a free T4 of 1.69 ng/dL, and thyroid stimu-
! m0 ^( u. C5 N! klating hormone level was 1.3 µIU/mL (both normal).
6 F$ z" U4 O% b3 aThe concentrations of serum electrolytes, blood6 J$ r3 I8 e7 n6 C; `) i
urea nitrogen, creatinine, and calcium all were
+ v3 }" d6 S% B$ b# u) Xwithin normal range for his age. The concentration& _& S: ?! B5 H
of serum 17-hydroxyprogesterone was 16 ng/dL0 Z6 Y+ l# C! h0 @: Q% k+ N, }
(normal, 3 to 90 ng/dL), androstenedione was 20
0 h7 j8 h0 P1 P# Sng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
% m9 |4 d* p- _0 M$ R3 Zterone was 38 ng/dL (normal, 50 to 760 ng/dL),
& B' u' s; ~" L! N: ddesoxycorticosterone was 4.3 ng/dL (normal, 7 to
7 Z; v$ |" u$ V* J. l8 @2 U( n49ng/dL), 11-desoxycortisol (specific compound S)1 L- F% ~6 p% c9 [! d
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-, b, B$ N* f* q6 ]% H& S; f
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total- a6 S" g% {5 I6 o/ O3 b0 O
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
& |; f3 a0 Q$ y4 ]8 hand β-human chorionic gonadotropin was less than' ^; m( M! J' H/ R7 W# [
5 mIU/mL (normal <5 mIU/mL). Serum follicular9 c. ]8 w% h1 b, n" t
stimulating hormone and leuteinizing hormone! D$ @' [" w. w' Y) t9 S. A
concentrations were less than 0.05 mIU/mL) f5 ]. M) [" i# U
(prepubertal).) C2 T& ?! p+ K! I
The parents were notified about the laboratory5 W6 o! Q% W3 T7 L: S) _
results and were informed that all of the tests were
$ K, i3 s& O2 F- M. v1 \4 V4 E2 ~normal except the testosterone level was high. The! e9 _4 X$ S7 r6 [( |+ {5 W
follow-up visit was arranged within a few weeks to5 ~9 c! d( v- H3 D# x; o T* {/ w
obtain testicular and abdominal sonograms; how-$ n% G- d5 ^0 n+ L6 r' c
ever, the family did not return for 4 months.
' |+ P2 P6 \$ f" P/ K0 ?4 G* hPhysical examination at this time revealed that the
9 f$ o: R& [6 s, tchild had grown 2.5 cm in 4 months and had gained
6 O) I1 U5 u" y7 s4 K2 kg of weight. Physical examination remained1 @; s3 W# W* _: ~) v8 a8 Z0 M P Q
unchanged. Surprisingly, the pubic hair almost com-
* l9 } K; A, |8 b' Bpletely disappeared except for a few vellous hairs at
5 k3 p% N# n" _! dthe base of the phallus. Testicular volume was still 23 Y3 H, @) O3 N7 A* o% M) t
mL, and the size of the penis remained unchanged.+ h5 i9 U% B' I
The mother also said that the boy was no longer hav-
, \& B6 [6 ^6 Q4 j0 Ping frequent erections.
* {) G* G+ U( jBoth parents were again questioned about use of
9 ?3 @, ~/ {3 S/ eany ointment/creams that they may have applied to! K( j0 ]: w1 e
the child’s skin. This time the father admitted the
2 o$ e* g. H ?! U4 P4 JTopical Testosterone Exposure / Bhowmick et al 541
8 r$ {; S6 f. c+ S: vuse of testosterone gel twice daily that he was apply-: y" q7 W6 t' n1 Q3 v3 q7 J
ing over his own shoulders, chest, and back area for
- i \! R) }% l$ d7 D% K o% ]( u$ Oa year. The father also revealed he was embarrassed- H0 t2 M* c$ @% H# n" y& g( S. r7 S
to disclose that he was using a testosterone gel pre-0 s7 w+ Q/ D$ y! `6 y& M9 d# v
scribed by his family physician for decreased libido
& Q2 z, A% b8 r% N0 G3 ~secondary to depression.& U& [- a" j5 M& g2 g
The child slept in the same bed with parents.
) V9 R9 Y5 _# f2 A/ t/ o* XThe father would hug the baby and hold him on his5 H) ^ r2 k# e4 J
chest for a considerable period of time, causing sig-
}* P6 @. ]# s4 C9 o$ X: j2 ?2 m* Unificant bare skin contact between baby and father.
9 Z5 P- l2 ?' @7 o+ qThe father also admitted that after the phone call,
# N$ i2 g [# h0 d8 Twhen he learned the testosterone level in the baby
; N- v' u7 U5 p4 ]: ^- k. g$ uwas high, he then read the product information9 f ?0 B% F1 V& E
packet and concluded that it was most likely the rea-$ h9 h, d& ^& R
son for the child’s virilization. At that time, they3 o+ |4 z8 r2 i3 J
decided to put the baby in a separate bed, and the" ~9 ]* J0 d* }) \& O
father was not hugging him with bare skin and had
5 B, G8 H$ J, n) q2 |been using protective clothing. A repeat testosterone/ x+ X: C4 U$ E+ ^
test was ordered, but the family did not go to the9 n5 V. l+ G" S! M: [. o& y1 _
laboratory to obtain the test.! [/ p1 ^* P" g' A# k
Discussion
/ }6 k5 ^0 I3 a) ]Precocious puberty in boys is defined as secondary/ Y }" D: @2 H7 f6 t N* s* B# r
sexual development before 9 years of age.1,48 c6 t& ?2 C% B3 Q. e+ z. G- R
Precocious puberty is termed as central (true) when
/ y4 A. U: x8 {4 Q. q2 Oit is caused by the premature activation of hypo-, G& v y% X+ e: G/ j7 V% H, r
thalamic pituitary gonadal axis. CPP is more com-
; ~+ W7 X5 \0 @" tmon in girls than in boys.1,3 Most boys with CPP2 u6 y% C& L, _; f
may have a central nervous system lesion that is
0 l- [ ^( ?" wresponsible for the early activation of the hypothal-' J5 `3 i' x5 }/ `' q- F
amic pituitary gonadal axis.1-3 Thus, greater empha-
: B3 h5 w( N: h& M; M ?/ }+ S% ^sis has been given to neuroradiologic imaging in
) F6 s* Z5 j1 L4 H" b5 r, N1 w/ nboys with precocious puberty. In addition to viril-3 N# I# ^2 q8 Y$ }. s
ization, the clinical hallmark of CPP is the symmet-: i" x+ T2 h6 ?) C( {
rical testicular growth secondary to stimulation by4 h- C9 g3 N' p/ I
gonadotropins.1,3$ @# ]& E) F( H& n( H
Gonadotropin-independent peripheral preco-" m1 @! ~( e. {; k& r, ^; W
cious puberty in boys also results from inappropriate
8 A3 ?7 A. Y2 Kandrogenic stimulation from either endogenous or; J8 I$ E3 C9 {* O
exogenous sources, nonpituitary gonadotropin stim-) J/ `( @0 [; H x
ulation, and rare activating mutations.3 Virilizing$ X& q, l* p3 V( H$ t. J
congenital adrenal hyperplasia producing excessive
1 |8 Q! u# y1 T0 q$ uadrenal androgens is a common cause of precocious
+ i5 q9 J# @3 i* @puberty in boys.3,4
* v+ H+ Y: o' F# Y; fThe most common form of congenital adrenal4 x) b# Z! H" _. e9 C
hyperplasia is the 21-hydroxylase enzyme deficiency.* e! V2 z& A, j
The 11-β hydroxylase deficiency may also result in
/ V7 Q4 r* z( L! {+ }( dexcessive adrenal androgen production, and rarely,
4 }, h" ~4 f( uan adrenal tumor may also cause adrenal androgen( l" Q" k) H6 Z8 n: G
excess.1,3: ]" l% j6 H/ t- o5 S" b+ V' r& a
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
E" P# J8 D3 t. i. D542 Clinical Pediatrics / Vol. 46, No. 6, July 2007' K; _ O# d) n
A unique entity of male-limited gonadotropin-
) I0 Z8 {) ~; Z' _7 v1 kindependent precocious puberty, which is also known
( P% x) ^( R- C. Gas testotoxicosis, may cause precocious puberty at a% E1 D: Q0 V+ l; r
very young age. The physical findings in these boys; n4 w: I& D6 Z1 y
with this disorder are full pubertal development,& Y7 y |1 L; G( K2 g( Y! Y1 l: w
including bilateral testicular growth, similar to boys
( U, h3 E3 r- R3 V" }with CPP. The gonadotropin levels in this disorder
4 ]; f2 g/ r: ~- k8 J" [are suppressed to prepubertal levels and do not show9 G# g2 n& }+ ]) ~1 v! M& I0 O
pubertal response of gonadotropin after gonadotropin-
! w' M+ ^) Z* w' Greleasing hormone stimulation. This is a sex-linked
) c; c6 t; c6 P5 W7 h2 R: Oautosomal dominant disorder that affects only
3 a5 g( S. p) ~6 nmales; therefore, other male members of the family% {: p6 r; P- F* h
may have similar precocious puberty.3& z) ]- ]9 J/ y @1 z8 m
In our patient, physical examination was incon-
" H( `& Z+ w3 r: k& J* R }sistent with true precocious puberty since his testi-! Q' r: ^6 K* u% F8 i' r3 o9 s- R
cles were prepubertal in size. However, testotoxicosis
( c. ~& R! @; }7 S+ f/ `' Q7 m, Kwas in the differential diagnosis because his father/ J7 g& W: |9 K) C- Q
started puberty somewhat early, and occasionally,2 Z) i; d% a; G6 |
testicular enlargement is not that evident in the2 E$ v. E& C8 V) M2 T
beginning of this process.1 In the absence of a neg-
) b" n ^# y7 g( r3 N7 aative initial history of androgen exposure, our
. O1 o) G% c; j) t3 G2 cbiggest concern was virilizing adrenal hyperplasia,
* _: l+ r) k' k& Deither 21-hydroxylase deficiency or 11-β hydroxylase
/ Y" a; j1 z- @# y9 o2 Fdeficiency. Those diagnoses were excluded by find-9 y: Z* Z0 y* H! N' D
ing the normal level of adrenal steroids.& p# ?! c1 w& o0 {/ r: b, k
The diagnosis of exogenous androgens was strongly
; Y) ]0 X$ H. E" m! Jsuspected in a follow-up visit after 4 months because6 Q+ P* N. T- w' T- Q
the physical examination revealed the complete disap-7 F/ g; q/ L. q4 Q# o0 M" y
pearance of pubic hair, normal growth velocity, and+ R u$ t* |8 K- I4 Z
decreased erections. The father admitted using a testos-
0 o' n6 I) R& @# Pterone gel, which he concealed at first visit. He was' D2 {0 h0 f8 d0 `
using it rather frequently, twice a day. The Physicians’7 j% F% J/ p9 G- r! b& h+ }
Desk Reference, or package insert of this product, gel or
1 M5 O* X+ X' ]# |6 e2 l) Tcream, cautions about dermal testosterone transfer to
; ~8 T5 C. V* p; e& Tunprotected females through direct skin exposure.# F/ S. ` {$ D0 Q, b+ j/ R
Serum testosterone level was found to be 2 times the( M' O6 B* B. `& s
baseline value in those females who were exposed to# z4 Y; U; L5 h+ O/ G- m
even 15 minutes of direct skin contact with their male
4 N8 U/ A' ~( q& ?* l: m& ]partners.6 However, when a shirt covered the applica-8 j7 E/ T. [" P1 R
tion site, this testosterone transfer was prevented.
5 J% X3 z4 d: Q" L; POur patient’s testosterone level was 60 ng/mL,) |0 n {8 |; r" i, z
which was clearly high. Some studies suggest that
$ t2 O0 b4 I3 Q- J: Ydermal conversion of testosterone to dihydrotestos-
6 x5 \/ c3 u. Nterone, which is a more potent metabolite, is more
+ c+ k. N( T& kactive in young children exposed to testosterone
; N6 e; O, r1 Y8 h$ dexogenously7; however, we did not measure a dihy-& X w; K& _( m4 F V/ s# |
drotestosterone level in our patient. In addition to
- @/ G4 j6 f8 i' Yvirilization, exposure to exogenous testosterone in; y, j# V5 I Y c% x
children results in an increase in growth velocity and
. O2 s2 q$ a3 x3 X5 `2 Eadvanced bone age, as seen in our patient.9 {/ G( Y5 |% R7 p
The long-term effect of androgen exposure during
, i# q0 A, @3 o5 n8 v; G, u) K; r( c; Aearly childhood on pubertal development and final2 b- O7 Y b+ n( Y
adult height are not fully known and always remain( c5 x$ i. F2 G+ p6 _
a concern. Children treated with short-term testos-4 M$ C/ a1 i* d! t
terone injection or topical androgen may exhibit some
" f" {& N4 V% f1 l3 Uacceleration of the skeletal maturation; however, after, A' |" e- ~" ]
cessation of treatment, the rate of bone maturation& i2 l8 s0 f' L+ A/ G
decelerates and gradually returns to normal.8,9: B8 B. p* K I7 Q7 a
There are conflicting reports and controversy
) r" a, d& J g- dover the effect of early androgen exposure on adult! ^1 m4 ]* ?% h0 `
penile length.10,11 Some reports suggest subnormal: q/ K. X& i/ O. N" \
adult penile length, apparently because of downreg-
& f( k% q( p6 q1 Julation of androgen receptor number.10,12 However,- c* Y4 G+ a, @. L0 W
Sutherland et al13 did not find a correlation between; L. }( k- i& X. T8 _: b9 y
childhood testosterone exposure and reduced adult7 Z+ Y; L. d, C4 I
penile length in clinical studies.1 o8 A# R/ a. A$ }
Nonetheless, we do not believe our patient is
8 u/ U5 Z6 [) v h8 Jgoing to experience any of the untoward effects from& J4 e. s- u6 G$ g; |* |- b. h. q
testosterone exposure as mentioned earlier because
/ q3 _* R& q5 U. O1 }the exposure was not for a prolonged period of time.
8 h& V A( }& X3 SAlthough the bone age was advanced at the time of- i% Q; O2 J1 ?- _- O
diagnosis, the child had a normal growth velocity at( w3 s! l( q! l" w, n5 h8 F* I
the follow-up visit. It is hoped that his final adult
- S9 b x6 P1 L0 ?* C$ K0 Wheight will not be affected., y" N. e; R7 D2 {- c4 i0 Y$ ]
Although rarely reported, the widespread avail-" u( `: D1 T' Y
ability of androgen products in our society may
& o# Q9 {( c' x' J* Q; Lindeed cause more virilization in male or female
0 G0 q4 p9 J7 k( ]; R- w" f/ H( U7 Tchildren than one would realize. Exposure to andro-' c# n1 @# L6 y8 [" p
gen products must be considered and specific ques-
3 I4 ]2 Y0 t5 K+ m0 T) c2 Ttioning about the use of a testosterone product or( H3 F. w( B( x6 L, t
gel should be asked of the family members during1 w3 |0 g! q D2 q8 L% c# v! `
the evaluation of any children who present with vir-
|0 O, M$ g/ ]& k r) Z, ~7 hilization or peripheral precocious puberty. The diag-( T; l8 Z8 m5 r
nosis can be established by just a few tests and by/ |: m2 I* o& \- y; P2 }# _6 H
appropriate history. The inability to obtain such a% j4 K- ?& @: ^
history, or failure to ask the specific questions, may
~- O2 F2 h' r5 |; l% Bresult in extensive, unnecessary, and expensive
3 [% U+ `+ B6 O* i' Z. yinvestigation. The primary care physician should be
8 j4 q* n5 ]3 N$ O' i. p1 Gaware of this fact, because most of these children* H, `' y! O/ e9 b. L
may initially present in their practice. The Physicians’$ U ~7 X" a: L
Desk Reference and package insert should also put a" R- n C- Y" C& k' L0 n
warning about the virilizing effect on a male or" h1 q6 \; J% u! R1 h6 l
female child who might come in contact with some-+ \& o: B0 T- c( Z! l
one using any of these products.
b0 l! Z3 A2 @5 e! N' U* mReferences
8 ]( T |1 k6 [* t5 `# Y1. Styne DM. The testes: disorder of sexual differentiation
0 |' J; F7 k5 I& ]2 D3 hand puberty in the male. In: Sperling MA, ed. Pediatric: _- L0 S2 g8 Y& Y9 L$ X5 M7 j
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;& w9 h9 [$ s2 m- r4 ^' ^
2002: 565-628.5 B0 L5 H) |+ H& K
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
+ z: @6 @2 f d! Cpuberty in children with tumours of the suprasellar pineal
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areas: organic central precocious puberty. Acta Paediatr.
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3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed. \7 _- q: E7 B+ m
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
! \* D1 F3 ^+ Y& f4 D1 ZDekker Inc; 2003:211-238.
+ [9 D' A. v3 g, T6 _& {% Q4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual- J/ g, t+ ^- n) N1 W: I
development in a two-year-old boy induced by topical, k# i6 }: l( C* f5 H' P
exposure to testosterone. Pediatrics. 1999;104:e23.
q+ F4 I! s. N$ f$ D; W5 P) z5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
- Q W) i/ {' |) P0 Z) M7 ESkeletal Development of the Hand and Wrist. 2nd ed.! t0 D4 n/ C* G4 x& _. f# m
Stanford, CA: Stanford University Press; 1959.: e" {3 g# S' R- D; Y p( K- W
6. Physicians’ Desk Reference. Androgel 1% testosterone,, r" | n' L- l5 K# i4 R# T
Unimed Pharmaceutical Inc. Montvale, NJ: Medical& {5 ^! Y% G( V8 z9 r" J
Economics Company, Inc; 2004:3239-3241.. q; q1 M- J" o
7. Klugo RC, Cerny JC. Response of micropenis to topical
4 D+ S' k2 @) i( V' a k; ]9 @testosterone and gonadotropin. J Urol. 1978;119:" i1 K) f% d+ g% R2 l- {$ b
667-668.2 T1 l& B/ y5 S9 d
8. Guthrie RD, Smith DW, Graham CB. Testosterone
0 Z2 i- L' Y. q) ~' utreatment for micropenis during early childhood. J Pediatr.; K7 ?: ] v8 l5 U. o: J& T
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