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is a significant concern for physicians. Central
( M0 E8 Z) D' |. G# f5 zprecocious puberty (CPP), which is mediated
( ?1 E2 }( J2 ~: p9 r k* P: cthrough the hypothalamic pituitary gonadal axis, has
3 e+ |5 b) J, E- m+ Ea higher incidence of organic central nervous system
: U7 ~* b8 Y7 E. K8 k3 xlesions in boys.1,2 Virilization in boys, as manifested8 [' r0 l9 B6 N* c( o
by enlargement of the penis, development of pubic
' |- }) q* W# b5 h. c7 D5 @7 nhair, and facial acne without enlargement of testi-
) `$ A; @+ D! ^9 dcles, suggests peripheral or pseudopuberty.1-3 We% B: p- M2 M0 O6 _: T* S% q
report a 16-month-old boy who presented with the0 w+ S# y( E6 }5 d# D
enlargement of the phallus and pubic hair develop-, P4 D5 m; g" ~4 s( ], Y) `6 s& E
ment without testicular enlargement, which was due4 ~, B1 v& B; y' A
to the unintentional exposure to androgen gel used by
8 R7 a' M. a* q# R7 x. s J3 Vthe father. The family initially concealed this infor-, v) K1 G! S5 f( e
mation, resulting in an extensive work-up for this
4 L1 M2 v% i; b% i$ a" cchild. Given the widespread and easy availability of
& Y* P3 D/ ^9 `! G n/ x# ztestosterone gel and cream, we believe this is proba-& e- i) o0 b2 X6 S# c6 c" M3 D; r+ }4 z, j
bly more common than the rare case report in the
* i3 g! I9 B/ {7 M/ S& `" `literature.4
; }) O1 |+ J% R. U, hPatient Report
2 s% ?) j+ Z( I6 D7 }1 g- q/ fA 16-month-old white child was referred to the
- f5 }8 w- i" e5 @, Hendocrine clinic by his pediatrician with the concern
P4 l( M4 u% J e. xof early sexual development. His mother noticed
0 c, S z' F8 P! G- f3 vlight colored pubic hair development when he was
$ P" c- ~- n* {3 @8 N% l' y* UFrom the 1Division of Pediatric Endocrinology, 2University of
$ E7 X% S2 c9 g' L: KSouth Alabama Medical Center, Mobile, Alabama.6 L5 C6 k0 f% }" r* {9 p
Address correspondence to: Samar K. Bhowmick, MD, FACE,
$ d: ^- Z4 z$ G% k" ^$ Y: m8 q( UProfessor of Pediatrics, University of South Alabama, College of
, n5 ^! l, S& R0 o: pMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;6 B/ d9 i2 i' D4 s4 J' M
e-mail: [email protected].# H. {5 F7 m- i5 Y, }1 d. h. U
about 6 to 7 months old, which progressively became; q+ N- L. F5 J; _) c
darker. She was also concerned about the enlarge-
" Q5 _' E' {+ k/ x9 [; s+ dment of his penis and frequent erections. The child) |: y$ G; b% X) W3 L
was the product of a full-term normal delivery, with
/ k" C: c( b# E1 ka birth weight of 7 lb 14 oz, and birth length of; j4 ^; `4 |0 d9 V
20 inches. He was breast-fed throughout the first year3 E3 K2 M/ n2 |0 t( K0 R5 V( s
of life and was still receiving breast milk along with' L- M4 O4 L1 ^& O: }
solid food. He had no hospitalizations or surgery,( A8 q, w* C" {6 h2 m" i* V
and his psychosocial and psychomotor development
: @( t7 h: n! t- w- X5 m# Iwas age appropriate.
% r! Y. O6 B3 }The family history was remarkable for the father,# N% ~0 l, p% |- \
who was diagnosed with hypothyroidism at age 16,2 x- ?/ j- e/ I. ]2 j
which was treated with thyroxine. The father’s2 j/ Y m/ P5 A4 `- i1 W
height was 6 feet, and he went through a somewhat
' q7 M( R" G- R1 Dearly puberty and had stopped growing by age 14.0 `+ R$ v, x5 b
The father denied taking any other medication. The
2 r" l% E" H. M8 y" [child’s mother was in good health. Her menarche. p' s* x% |3 @- H1 [9 }/ k- P
was at 11 years of age, and her height was at 5 feet# l: i( p9 V8 d" a: W
5 inches. There was no other family history of pre- D$ ~6 T2 Y- ^& E, p3 \
cocious sexual development in the first-degree rela-6 }) X0 g, Z) N& ?5 R4 L
tives. There were no siblings.
1 n3 A8 O' e0 r7 f, t) a# pPhysical Examination5 f2 g4 I2 J( R0 f2 ~8 O( W
The physical examination revealed a very active,
8 x$ ]7 E5 y% ~' Zplayful, and healthy boy. The vital signs documented
# s X4 z" @; C; h) t1 _( o! |a blood pressure of 85/50 mm Hg, his length was
* ~5 S4 @, q4 ^+ V' K90 cm (>97th percentile), and his weight was 14.4 kg
4 g% I7 ?8 f1 O! e& O2 j(also >97th percentile). The observed yearly growth
1 N# s' J& q# b0 d( yvelocity was 30 cm (12 inches). The examination of
1 Z0 G, a' Q/ m7 Othe neck revealed no thyroid enlargement.
- Y+ I/ t) i9 CThe genitourinary examination was remarkable for; Q+ k# g R; x
enlargement of the penis, with a stretched length of
" m. p% \- q& q8 cm and a width of 2 cm. The glans penis was very well
0 K2 V4 n! B# mdeveloped. The pubic hair was Tanner II, mostly around5 y9 G0 N: U# H, M) a5 p7 X/ K% u
5407 Y2 @: Q3 d$ ] C' {
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
( h5 M. w9 d; h. Y% P7 G+ Gthe base of the phallus and was dark and curled. The
) m& x; Y, T/ i! V0 d. Ztesticular volume was prepubertal at 2 mL each.
+ E* i/ o) a$ M+ e9 a' H/ J, Z5 CThe skin was moist and smooth and somewhat/ k4 m! `$ M b4 |' l( K& W0 `
oily. No axillary hair was noted. There were no
) W2 b5 B2 } @2 r% fabnormal skin pigmentations or café-au-lait spots.
/ n4 F( Y8 H( u# c1 cNeurologic evaluation showed deep tendon reflex 2+
* a2 z. w* b2 T9 Q5 ^. c' C# r% Zbilateral and symmetrical. There was no suggestion
7 ^" _8 O* `5 F) h* zof papilledema.* h; Z6 y( B7 K% O
Laboratory Evaluation2 O$ L7 Q0 x! Z: `+ Z# B T1 S4 a
The bone age was consistent with 28 months by
( ]& o; N( [8 I" Dusing the standard of Greulich and Pyle at a chrono-
3 V5 @0 l# j1 V& V a0 |5 O; J. mlogic age of 16 months (advanced).5 Chromosomal8 P: l- ~" U) O$ }8 ^" H! i9 z
karyotype was 46XY. The thyroid function test
, o9 N I/ E1 b9 p* H1 p- h3 fshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
- k* Z2 V0 G- s8 Rlating hormone level was 1.3 µIU/mL (both normal).% k* Y( S& N( {2 A- C, I& t( J/ D
The concentrations of serum electrolytes, blood" Y, a. T7 a+ b. {* ~7 R8 e! i+ T
urea nitrogen, creatinine, and calcium all were
+ Y* l, z9 D6 r4 _5 Twithin normal range for his age. The concentration
; P3 D# }$ U. b* j) b0 x: W- v0 f2 qof serum 17-hydroxyprogesterone was 16 ng/dL) _& \4 F$ Z8 }. [9 \7 R
(normal, 3 to 90 ng/dL), androstenedione was 20
/ \& ~# N; B% V; w, e) u, nng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-5 _6 O! O" Q& {5 W0 r
terone was 38 ng/dL (normal, 50 to 760 ng/dL),& G* ~. X: y! R! e
desoxycorticosterone was 4.3 ng/dL (normal, 7 to5 l/ L. E! ]# C
49ng/dL), 11-desoxycortisol (specific compound S)
. o( Z3 e- Z3 D$ v, _& lwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
' u$ [3 F5 e2 q2 c$ K5 ^7 ~! d& Ctisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
+ h; k( v6 E" }testosterone was 60 ng/dL (normal <3 to 10 ng/dL),3 y5 Y1 \" z7 H. x3 N' R6 {7 I
and β-human chorionic gonadotropin was less than
7 X# v% `" q# ?8 L5 mIU/mL (normal <5 mIU/mL). Serum follicular% g- f+ C2 @" z. H. p. @2 ]
stimulating hormone and leuteinizing hormone" q8 r" N5 K G' m0 t9 q% U" k
concentrations were less than 0.05 mIU/mL
9 Q$ m$ I9 q: h" V4 u+ ~(prepubertal)." r; H& P0 A, H n; u: p
The parents were notified about the laboratory( ]- f6 L- D; s/ d2 S
results and were informed that all of the tests were* _) `( q5 H& p1 n4 u
normal except the testosterone level was high. The3 t U5 R2 @( d
follow-up visit was arranged within a few weeks to
4 } |/ H8 H- ~' K h1 Uobtain testicular and abdominal sonograms; how-
/ B5 m4 ~- T! n ]ever, the family did not return for 4 months., {0 E2 ^) q0 M6 P
Physical examination at this time revealed that the' l" z4 ~1 {1 U, R' `
child had grown 2.5 cm in 4 months and had gained! X- k7 O# u4 w
2 kg of weight. Physical examination remained
: |: R) O- z4 n0 Q& \* h5 D Qunchanged. Surprisingly, the pubic hair almost com-
" d, ?" E% T9 r- ^: ]5 Xpletely disappeared except for a few vellous hairs at
: l9 N) ^. D! m8 C9 \ [, Qthe base of the phallus. Testicular volume was still 23 N( [. S$ W( n, K9 V9 V
mL, and the size of the penis remained unchanged.4 E4 w( \2 |1 w& q
The mother also said that the boy was no longer hav-
- O. a, l7 M/ X7 D7 Ding frequent erections.
4 Q+ Q- ^! ]: y- nBoth parents were again questioned about use of
- c- \) s o- Z, \any ointment/creams that they may have applied to; n8 X+ w9 r4 C7 |; w/ C2 I6 \
the child’s skin. This time the father admitted the
3 t+ C7 o5 n2 L8 t" KTopical Testosterone Exposure / Bhowmick et al 541' Z: S9 A6 d' M9 J: B/ i
use of testosterone gel twice daily that he was apply-( p. M, K) C& z, _" _; T
ing over his own shoulders, chest, and back area for+ z: Y+ w# R1 ]8 ]
a year. The father also revealed he was embarrassed; @1 R, D2 {, [+ }+ Q) ^' x
to disclose that he was using a testosterone gel pre-4 }' @' Y" ^2 _/ m
scribed by his family physician for decreased libido
- G6 r" E3 R+ Csecondary to depression.
2 U0 K# X: ^$ G) I+ N4 l% M# HThe child slept in the same bed with parents.& _5 g0 l3 r# l5 M2 {3 N
The father would hug the baby and hold him on his/ e, K. z$ j( T8 r& S' ^9 x: J
chest for a considerable period of time, causing sig-
; p: y% T+ {' G8 r0 jnificant bare skin contact between baby and father.
0 _" l8 P2 x& o1 e9 p+ lThe father also admitted that after the phone call,0 v) P& d8 e1 Z6 f( G
when he learned the testosterone level in the baby$ ^: O$ y6 a' R
was high, he then read the product information$ |' D9 W. K7 Q
packet and concluded that it was most likely the rea-# W8 P9 u9 l* V# A$ o
son for the child’s virilization. At that time, they3 H/ A" q( m2 v2 E
decided to put the baby in a separate bed, and the2 p! n6 J4 ?. a( Q6 x. g) |0 ?' M
father was not hugging him with bare skin and had2 ]7 o9 l( e4 n8 s. F0 t
been using protective clothing. A repeat testosterone
' I) n0 U( V' ]+ _7 M# |- O6 Etest was ordered, but the family did not go to the4 P Z; A# @7 d4 v2 w$ d
laboratory to obtain the test.
' J3 N, I3 P: ~9 ODiscussion# o/ y- r5 p! z" H. N/ |3 _3 y2 r# {' [
Precocious puberty in boys is defined as secondary1 C0 r& L& F2 O4 |& e. F- v1 G
sexual development before 9 years of age.1,4: y. ?% Q7 e+ U; E! Y$ }
Precocious puberty is termed as central (true) when4 y1 \- D$ w( v. i
it is caused by the premature activation of hypo-
5 h& U# ] o$ `7 athalamic pituitary gonadal axis. CPP is more com-* J3 e! N" W( M% }8 @; H
mon in girls than in boys.1,3 Most boys with CPP* J, U9 F$ d( Q8 L, o
may have a central nervous system lesion that is7 E8 I; \3 d, \$ N: M
responsible for the early activation of the hypothal-
' d( K- Q6 \ U/ B: oamic pituitary gonadal axis.1-3 Thus, greater empha-: [% z' q( N3 t0 U6 H9 u
sis has been given to neuroradiologic imaging in
: F- O& g# c% jboys with precocious puberty. In addition to viril-
- i. j3 M) |$ K, Kization, the clinical hallmark of CPP is the symmet-
9 X6 ]0 @. f5 i4 [! P' Q! frical testicular growth secondary to stimulation by; B% k' G# F9 s; @9 o- m5 Y5 |
gonadotropins.1,38 S8 U% g2 |+ S/ T, P
Gonadotropin-independent peripheral preco-
0 [4 K& E; I7 \" D" icious puberty in boys also results from inappropriate
, s0 b5 q# Q: n& i3 x& P: Pandrogenic stimulation from either endogenous or. o: s1 Y8 |8 ^4 r
exogenous sources, nonpituitary gonadotropin stim-
* Q. @ U- i& z" v: p' I+ _" tulation, and rare activating mutations.3 Virilizing6 D) y O# z1 Z" w1 W% `$ r6 [ g; ^
congenital adrenal hyperplasia producing excessive
4 }; F' e- q/ [! D" ]( madrenal androgens is a common cause of precocious& |" ?" d( r! M# \
puberty in boys.3,4! r* t$ X. g1 Z% J
The most common form of congenital adrenal
A; C' Z4 g6 B; D( V1 @hyperplasia is the 21-hydroxylase enzyme deficiency.
( K8 ]( g2 V9 F. dThe 11-β hydroxylase deficiency may also result in4 I" H. E6 K! V H3 ^+ m! g
excessive adrenal androgen production, and rarely,- H4 T: L9 O& W
an adrenal tumor may also cause adrenal androgen
; l- g' L8 {0 U0 K6 a7 Mexcess.1,3
4 f; A5 ~# Z, w4 `2 C2 P$ oat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
, n" r: a5 l7 m542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
/ I: w& Z+ m/ Z, bA unique entity of male-limited gonadotropin-
- P& l& d& E5 {% c. g$ y+ Pindependent precocious puberty, which is also known
& `9 [7 d8 u* n E7 ]4 \. pas testotoxicosis, may cause precocious puberty at a2 j9 h1 h; G0 l- C6 C* v' t9 ~
very young age. The physical findings in these boys
* K( H" g1 B2 V0 L3 k) |with this disorder are full pubertal development,
2 \! c3 k' v g0 Tincluding bilateral testicular growth, similar to boys# ~3 n1 ^6 L# b
with CPP. The gonadotropin levels in this disorder: e' a3 t9 W! ?# X+ Q& [
are suppressed to prepubertal levels and do not show
" J: Q& m7 \# a; o+ ^# Rpubertal response of gonadotropin after gonadotropin-
1 Q# }2 k3 i/ I' p1 e- Ereleasing hormone stimulation. This is a sex-linked
3 N7 d% B. \7 j& M) Aautosomal dominant disorder that affects only
" y/ ~% p1 P2 j1 J. r5 X4 qmales; therefore, other male members of the family o; p1 S0 E+ S3 c/ l% t
may have similar precocious puberty.3) V; p1 Q5 _, b0 n5 N
In our patient, physical examination was incon-
/ J' I: [1 I" V: `sistent with true precocious puberty since his testi-+ |$ U4 p8 x( l% ~: E" H" U1 K
cles were prepubertal in size. However, testotoxicosis
0 A+ m9 i; P8 {was in the differential diagnosis because his father
@5 v1 |4 s- o* f }; @started puberty somewhat early, and occasionally,
% Q0 W2 }9 ^8 `7 E9 q+ A! P4 [" O+ Etesticular enlargement is not that evident in the7 z2 a/ Q7 M3 S& m t( o
beginning of this process.1 In the absence of a neg-. @, i9 ?8 \2 S
ative initial history of androgen exposure, our
) B: X1 g* L) |3 _+ d0 ]0 @! vbiggest concern was virilizing adrenal hyperplasia,
8 H% w' Z# @; D" G) k( a7 seither 21-hydroxylase deficiency or 11-β hydroxylase
Z7 O" X" C0 A+ d7 r7 n O! c7 j4 Gdeficiency. Those diagnoses were excluded by find-& T; }1 _) j0 J) @* Q: c2 l
ing the normal level of adrenal steroids.
& Z6 n% P' v+ ^3 q# fThe diagnosis of exogenous androgens was strongly. c G6 _+ u' w, O+ K2 `
suspected in a follow-up visit after 4 months because; g% o1 T- _" \! W! A! {& v- u7 g. e
the physical examination revealed the complete disap-
+ h( R& L! C, m8 B1 i Upearance of pubic hair, normal growth velocity, and) {: U4 {# ]* {- O. P. j2 Z1 p
decreased erections. The father admitted using a testos-
' ~+ Y& J; i' [) c4 Wterone gel, which he concealed at first visit. He was
$ D( B+ l* Q6 Cusing it rather frequently, twice a day. The Physicians’
0 \4 z! E. \0 \7 \Desk Reference, or package insert of this product, gel or( `5 D! e2 q/ b
cream, cautions about dermal testosterone transfer to
$ c9 c9 ]$ A1 J: ]8 v! h9 Hunprotected females through direct skin exposure.
2 S" I( C! a. U hSerum testosterone level was found to be 2 times the( l4 r+ [2 ` g" F4 E
baseline value in those females who were exposed to5 S: X1 \4 [: t7 Y
even 15 minutes of direct skin contact with their male
1 D5 J. ^+ W: _$ ?* zpartners.6 However, when a shirt covered the applica-7 \- A; i( W7 P
tion site, this testosterone transfer was prevented.' O& ?7 @8 }8 L$ ~1 V
Our patient’s testosterone level was 60 ng/mL,- i) W/ a5 ]1 A7 K+ [; x
which was clearly high. Some studies suggest that
3 Q% z8 \: M1 K. jdermal conversion of testosterone to dihydrotestos-
( g$ z& N X( j) Iterone, which is a more potent metabolite, is more! K+ f, x8 |& F7 x9 g: \: A; c
active in young children exposed to testosterone
& U; m# u! U' `5 c# xexogenously7; however, we did not measure a dihy-
8 y% o2 H. Y5 ~3 i2 ?& udrotestosterone level in our patient. In addition to8 E& h J6 u( n- t$ f, {
virilization, exposure to exogenous testosterone in
3 ?5 H( q9 s( m X) F) u0 ]children results in an increase in growth velocity and! L) L0 F* R3 S
advanced bone age, as seen in our patient.5 z+ q* S" C6 h5 U z
The long-term effect of androgen exposure during) o& ?% N; `" }& S- K
early childhood on pubertal development and final
- A9 N6 g+ ~# m& q( f9 Sadult height are not fully known and always remain
) h# j4 B) o8 P' C" x. Pa concern. Children treated with short-term testos-
$ O+ l; h, e ]( qterone injection or topical androgen may exhibit some* n6 ?+ S' w& D9 b8 i6 o
acceleration of the skeletal maturation; however, after: L& k3 N. j$ A9 _7 o" y
cessation of treatment, the rate of bone maturation- L( M9 Q6 u% r2 b" `" N) c
decelerates and gradually returns to normal.8,9
P3 k, G9 I$ ?( ^! {* aThere are conflicting reports and controversy1 C0 z" J* @& Y/ |# e
over the effect of early androgen exposure on adult! U4 R! i8 N, i/ C' @ M" ^/ U
penile length.10,11 Some reports suggest subnormal
$ Z' U" s% j" ]' j5 m: Oadult penile length, apparently because of downreg-
6 s; H) S: S$ `6 \ulation of androgen receptor number.10,12 However,
2 j, p, _! A6 s( t9 h5 C- F( xSutherland et al13 did not find a correlation between) m2 @4 e) \# M! {* n+ D& h
childhood testosterone exposure and reduced adult
7 y( c3 }" i0 k+ q( Y6 s6 Lpenile length in clinical studies.8 F) B- w; n [
Nonetheless, we do not believe our patient is
& e ~$ w8 b$ | u: |$ Ugoing to experience any of the untoward effects from* C" r- Z1 P8 M# G
testosterone exposure as mentioned earlier because' ~% H- u) E: [7 _
the exposure was not for a prolonged period of time.
+ D3 R9 C# n# V2 mAlthough the bone age was advanced at the time of
1 w" k1 M0 H$ D2 f# Odiagnosis, the child had a normal growth velocity at6 `1 H& B3 d" `7 e
the follow-up visit. It is hoped that his final adult$ |; q0 E" o1 |+ G( k
height will not be affected." [) E! Z0 A0 u
Although rarely reported, the widespread avail-
5 u5 }) u8 e; a5 U3 Xability of androgen products in our society may& B/ Y: I2 O E# }
indeed cause more virilization in male or female
/ c4 V. ]' O7 `! L9 R( K8 ]( H& Mchildren than one would realize. Exposure to andro-
L; c- B2 Q J! G- m5 C; Bgen products must be considered and specific ques-
7 M! W1 x( n, Etioning about the use of a testosterone product or9 D$ E9 n) }) {# G
gel should be asked of the family members during
, T- p, I/ h* C( v4 G/ Dthe evaluation of any children who present with vir-, }6 U( ?! p9 q! A, x. z6 t
ilization or peripheral precocious puberty. The diag-
; P! L7 O3 c; i( _( ?+ h, G6 _nosis can be established by just a few tests and by M! X* I: p1 U8 n" j3 u: |$ u# o
appropriate history. The inability to obtain such a5 B* b/ T. v2 g ?. j+ Q+ M2 h: v
history, or failure to ask the specific questions, may
- e% M' r* Y0 u+ n$ {result in extensive, unnecessary, and expensive
4 Z, t* I5 l2 c" T+ C& r B. ]investigation. The primary care physician should be
! L* K# j+ ]/ V- @$ L! Z! n4 taware of this fact, because most of these children# X) U* j' m4 y; {) D) U
may initially present in their practice. The Physicians’6 E9 L! x" M) I
Desk Reference and package insert should also put a
' }& @, n5 V% Bwarning about the virilizing effect on a male or2 w* Y8 D: w! s* G. d
female child who might come in contact with some-
) j3 @( n K' P2 t: `one using any of these products.: R$ s/ i3 M$ w& G
References
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;3 ~2 e& n' G: L3 T
2002: 565-628.7 _2 I% O4 e) S8 s! ? M; P
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious7 D' Q' H5 {3 a
puberty in children with tumours of the suprasellar pineal
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/ k5 L9 R8 z* ~1 q. M' i2 f3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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( E* i2 \/ K" M, ?1 K- r0 V* K wDekker Inc; 2003:211-238.% C: \/ F/ u* x0 Q1 P' A
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
+ a4 _! O4 q% X( ?5 O) j% rdevelopment in a two-year-old boy induced by topical
$ F! Y `1 A9 e8 sexposure to testosterone. Pediatrics. 1999;104:e23./ ], J9 T; s0 L) I
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
2 o3 H. w: o3 ?" r$ f. g4 i( vSkeletal Development of the Hand and Wrist. 2nd ed.
8 x- Q a# \0 E0 r1 }Stanford, CA: Stanford University Press; 1959.
+ j& \' f: g; L3 O4 q* ^6. Physicians’ Desk Reference. Androgel 1% testosterone,; T6 W" K% x2 D4 j z! x0 U& U
Unimed Pharmaceutical Inc. Montvale, NJ: Medical/ ^9 \! E3 Z) v9 f% }5 s0 U5 v3 Z
Economics Company, Inc; 2004:3239-3241.
9 z- F9 {9 N) ?" b4 ?7. Klugo RC, Cerny JC. Response of micropenis to topical
9 z7 D% Y3 T' j* B8 L8 Itestosterone and gonadotropin. J Urol. 1978;119:
% l% N9 @5 {" I( D* x6 o667-668.) I1 s- {- m# r; m' ~, W
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