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is a significant concern for physicians. Central
5 N) i/ y% D9 E2 b- I4 u9 Sprecocious puberty (CPP), which is mediated u$ l" ^# S! K9 C* q" g& p2 c6 D4 v7 U
through the hypothalamic pituitary gonadal axis, has1 V7 {" V& R8 l/ ?- g
a higher incidence of organic central nervous system/ i! D, _6 I- A" q
lesions in boys.1,2 Virilization in boys, as manifested) ?4 E( j! g2 L2 D+ c, N6 v9 D' e
by enlargement of the penis, development of pubic
3 V; o' z, E, V6 o j$ k) k6 T9 ~hair, and facial acne without enlargement of testi-, g$ L% i+ F' h! b) I
cles, suggests peripheral or pseudopuberty.1-3 We. e6 a; Y* K* j' G+ a) c& e' D% K* L
report a 16-month-old boy who presented with the# D0 g2 P3 B" J1 u& w3 ]
enlargement of the phallus and pubic hair develop-2 L) e6 \, U+ p. J
ment without testicular enlargement, which was due% h% \2 A( P1 l3 |- j
to the unintentional exposure to androgen gel used by) O" ~4 N. x& `
the father. The family initially concealed this infor-
$ R" F9 ~0 \ X& T# Jmation, resulting in an extensive work-up for this: w( C/ X: \: l1 r F' ^: T
child. Given the widespread and easy availability of8 C& \4 z0 D8 R# ~1 d% ~
testosterone gel and cream, we believe this is proba-
9 h e* W' R1 g; \& p. }+ K: e# }bly more common than the rare case report in the
4 l6 F: n6 |' Z! T uliterature.4
. M" @4 X k& R, bPatient Report8 V# w! s8 A: H: C0 @
A 16-month-old white child was referred to the
6 Y: q, o, d/ P. J3 @2 Q5 E6 _endocrine clinic by his pediatrician with the concern
' u( j4 h# f8 }1 u) Tof early sexual development. His mother noticed: ?" [$ V s' { q& |4 G; \ N
light colored pubic hair development when he was
1 E' D y/ ~2 e& tFrom the 1Division of Pediatric Endocrinology, 2University of& k% {# M/ q H. b- L+ Q4 M: H* ^7 x
South Alabama Medical Center, Mobile, Alabama.6 O+ c) _' o" B3 M; E0 W9 d
Address correspondence to: Samar K. Bhowmick, MD, FACE,
. L/ n. ?, P7 h! Z$ CProfessor of Pediatrics, University of South Alabama, College of
; {0 R1 q1 a$ w [Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;: q4 R B5 ^- h
e-mail: [email protected].
7 y! p, k+ S% k( u* Q& t1 oabout 6 to 7 months old, which progressively became
- Y2 u1 ~0 `4 G; l0 bdarker. She was also concerned about the enlarge-
) U- y* d4 r2 W# k0 N6 a# b+ W" _ment of his penis and frequent erections. The child+ x& j2 L9 }( J1 ^2 {. y; W
was the product of a full-term normal delivery, with2 ?: L0 t7 G7 M- @0 v
a birth weight of 7 lb 14 oz, and birth length of
J0 V6 I, T" S }3 y" a20 inches. He was breast-fed throughout the first year8 B5 D6 u8 g( k; b e; V
of life and was still receiving breast milk along with' Y6 D, t- `+ K+ J6 T
solid food. He had no hospitalizations or surgery, V9 S! w) o5 [8 P4 j' V9 f
and his psychosocial and psychomotor development# q: U2 H& }0 `( N# e" j
was age appropriate./ Q% _, E( l0 U/ g
The family history was remarkable for the father,6 Q! F( \& v, U/ P
who was diagnosed with hypothyroidism at age 16,
i2 F" I* A2 e( ywhich was treated with thyroxine. The father’s* q, X/ z. O4 I N
height was 6 feet, and he went through a somewhat
% S- u$ W$ q' [! c' }early puberty and had stopped growing by age 14.3 {3 p+ u5 {+ e+ U1 \
The father denied taking any other medication. The
$ q% R; A1 k$ L" h6 Vchild’s mother was in good health. Her menarche
# Q4 B' G& ^8 y fwas at 11 years of age, and her height was at 5 feet
9 |. n& A: d$ |) U5 inches. There was no other family history of pre-
3 U3 |( ~/ o1 F) Lcocious sexual development in the first-degree rela-
2 y, F g9 |3 B" ftives. There were no siblings.
$ A6 b4 D* j' BPhysical Examination3 p$ a0 I0 `8 [& N& I, ~
The physical examination revealed a very active,
+ [- [& Y- {8 C+ Aplayful, and healthy boy. The vital signs documented
, p* T3 o( m' U* xa blood pressure of 85/50 mm Hg, his length was5 O9 e. Q) G8 @$ L& E% r
90 cm (>97th percentile), and his weight was 14.4 kg" Q$ J9 d$ `$ l8 G1 a; S- c
(also >97th percentile). The observed yearly growth
3 Z1 J8 E. c3 Q3 [. N' i! U2 rvelocity was 30 cm (12 inches). The examination of
( k* Q0 D% z( B c5 B# u2 jthe neck revealed no thyroid enlargement.; R: S& [3 }, e* J: _1 ~, K0 e( f
The genitourinary examination was remarkable for
, `7 B( X+ Y# cenlargement of the penis, with a stretched length of
' }/ \0 n5 {/ L1 D0 V8 cm and a width of 2 cm. The glans penis was very well+ e) h- K& {0 v/ n6 D& `. F2 Z
developed. The pubic hair was Tanner II, mostly around* h4 v8 V8 h y
540
, [1 A0 O* O% p5 cat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from2 H# _0 Q: `, {. E, z; w! d8 X8 T
the base of the phallus and was dark and curled. The
. A) b' v; x8 vtesticular volume was prepubertal at 2 mL each.! E$ v, D' E' H! L6 q5 a
The skin was moist and smooth and somewhat
4 t# b( v V5 R* Eoily. No axillary hair was noted. There were no
' d k& t) m% s3 d& V. L. Mabnormal skin pigmentations or café-au-lait spots.
' B# x: K# f% [' K# J, D! R3 Y3 G; sNeurologic evaluation showed deep tendon reflex 2+ e3 Y$ m0 D% u2 G& |2 L8 _# s! w
bilateral and symmetrical. There was no suggestion! }% l( k/ o7 l2 [3 }
of papilledema.% B" c7 Q* A. s+ r
Laboratory Evaluation7 X9 f u& a/ s* r8 r6 X4 d- d
The bone age was consistent with 28 months by
; g; V- l0 Z8 L) T* Susing the standard of Greulich and Pyle at a chrono-& F- b) i7 Z; s2 d: F* q
logic age of 16 months (advanced).5 Chromosomal! U' g5 I" x: V& Q, b* B" I
karyotype was 46XY. The thyroid function test
6 C2 W$ B8 m' p, s- Rshowed a free T4 of 1.69 ng/dL, and thyroid stimu-" L- F( p2 ?: t. [( [6 B
lating hormone level was 1.3 µIU/mL (both normal).
8 J8 \) C8 i: oThe concentrations of serum electrolytes, blood
3 N9 A" Y/ U( |: R lurea nitrogen, creatinine, and calcium all were
+ Z3 ^/ E: v9 V1 s9 e1 }within normal range for his age. The concentration
( [) s- E' _6 d; E2 Iof serum 17-hydroxyprogesterone was 16 ng/dL
3 r% w! A. g* X' @& d; I7 _! ~" t(normal, 3 to 90 ng/dL), androstenedione was 20& N* m. a5 Y" T- m: e7 c S: g6 M' }
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
6 ^ x1 N, r% P: o0 T4 K( d3 Iterone was 38 ng/dL (normal, 50 to 760 ng/dL),
) K% B ` C* L) M: v. G, M! J/ tdesoxycorticosterone was 4.3 ng/dL (normal, 7 to) ?3 Y4 v* q& j) o
49ng/dL), 11-desoxycortisol (specific compound S)
2 Y/ w C. j. Q' {* A U! Ywas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-8 p4 N" h$ C2 d1 n$ r8 F
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total# F# g) ]* E: t) l, E
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
+ K4 |1 F. ]" J6 O( V( l. ?6 P5 @and β-human chorionic gonadotropin was less than
! I% Q B) z+ K5 mIU/mL (normal <5 mIU/mL). Serum follicular
. P& l: {: @# R! jstimulating hormone and leuteinizing hormone
. y# L* X9 V8 w7 m4 u$ Y3 W7 nconcentrations were less than 0.05 mIU/mL g; m. Q; ^5 a& ~3 L) n' B0 z
(prepubertal). \( X) `# q/ y4 _. I
The parents were notified about the laboratory
# r6 z2 R3 `, Q/ q$ Fresults and were informed that all of the tests were4 f% _6 G" c" n ~
normal except the testosterone level was high. The
; ~$ W. y6 `, A' tfollow-up visit was arranged within a few weeks to
8 i3 {6 u# v! e0 uobtain testicular and abdominal sonograms; how-* x- [* t' d5 U# E! d$ H0 W3 j& v
ever, the family did not return for 4 months., F% X, c7 X- D2 G3 L; W
Physical examination at this time revealed that the8 Y; `" l# r4 z/ ~/ e
child had grown 2.5 cm in 4 months and had gained
! }6 c2 a3 C! r. N8 H4 I" c; _2 kg of weight. Physical examination remained6 _: W- D! k b% @
unchanged. Surprisingly, the pubic hair almost com-$ C) T7 ]5 I( h9 ?
pletely disappeared except for a few vellous hairs at
7 D2 k0 k3 e1 Othe base of the phallus. Testicular volume was still 2" V5 G, D" X% A5 r$ k/ B( s
mL, and the size of the penis remained unchanged.
4 V1 b. E1 b. kThe mother also said that the boy was no longer hav-
( E1 r) }' _' D6 H eing frequent erections./ h" c' e1 K- o6 m' B% G, b
Both parents were again questioned about use of1 ]* F+ y* p1 N" p# e! y% X
any ointment/creams that they may have applied to
7 W" s8 K$ }: ?) Y0 T1 Xthe child’s skin. This time the father admitted the+ `6 `4 r, r+ {, _$ F$ S; ^8 K
Topical Testosterone Exposure / Bhowmick et al 541
3 i& R$ K" k g. N3 z( h8 cuse of testosterone gel twice daily that he was apply-9 o( Y5 R0 h1 k9 ?# o
ing over his own shoulders, chest, and back area for
% f) g, Q8 P# G& {. xa year. The father also revealed he was embarrassed
& A6 l7 t- M5 s/ |6 }/ O! Tto disclose that he was using a testosterone gel pre-
) w9 D5 r7 P5 S& ^6 b! a j. Uscribed by his family physician for decreased libido1 S" ?2 [4 ~6 Q
secondary to depression.+ V; v" J" G$ [+ E. R, H2 y6 ?* n
The child slept in the same bed with parents.4 c' J0 H0 ^7 C, G
The father would hug the baby and hold him on his, m4 f7 _1 J, C" n$ ~# \% p
chest for a considerable period of time, causing sig-0 C" W0 o( p& O$ {0 C: `- U) M
nificant bare skin contact between baby and father.
, x7 y, K, A, T' [0 ]/ ]1 SThe father also admitted that after the phone call,
+ R1 E: G2 X) C; m6 y6 @/ Zwhen he learned the testosterone level in the baby& r' K7 E; W4 U% Z8 {
was high, he then read the product information
{4 ` C; n/ h; lpacket and concluded that it was most likely the rea-3 h; A" h# ]0 Q& p5 C. v% }3 M
son for the child’s virilization. At that time, they
: c: D1 h$ A* |, C8 [decided to put the baby in a separate bed, and the
8 f5 H& d( A' v8 w0 Pfather was not hugging him with bare skin and had
. Z9 I4 R0 h4 a) \7 |4 }; r, j: N! |+ P! Rbeen using protective clothing. A repeat testosterone& r, _7 g; o9 G
test was ordered, but the family did not go to the" b% x1 U: R3 t7 O
laboratory to obtain the test.
; j. s: ?: u3 X4 N$ Z e/ ODiscussion" n& x' R9 C+ ?8 `' X2 i& U
Precocious puberty in boys is defined as secondary
, x+ o) ^' n* w* J; b7 c& _sexual development before 9 years of age.1,4( g$ E' `9 j, E0 R$ l s( Z: q
Precocious puberty is termed as central (true) when2 }" N& Z) S8 }1 G$ |3 [: w
it is caused by the premature activation of hypo-
& F* J8 b8 x( X: Xthalamic pituitary gonadal axis. CPP is more com-; }5 r, f- B1 r* ?/ @
mon in girls than in boys.1,3 Most boys with CPP& c% v; a1 N' E9 H
may have a central nervous system lesion that is
! X6 N3 v! O0 X- M( f; o3 rresponsible for the early activation of the hypothal-) {9 Z G( X2 ]0 j9 z: ]5 }
amic pituitary gonadal axis.1-3 Thus, greater empha-7 `2 b4 z) a' u
sis has been given to neuroradiologic imaging in7 o/ a2 d8 I' V2 J' y8 J
boys with precocious puberty. In addition to viril-9 e T" x. }& {: v9 B- K1 F
ization, the clinical hallmark of CPP is the symmet-
5 X* _8 {- d( _rical testicular growth secondary to stimulation by
0 ]" M7 z3 } z% _1 G- Q0 X7 ^gonadotropins.1,3
; q! W: \- W E- u t! UGonadotropin-independent peripheral preco-! i: E/ a; {! b
cious puberty in boys also results from inappropriate# \; e: V; [4 z3 Q+ t S
androgenic stimulation from either endogenous or
8 z d2 k8 ?6 [/ @/ I# a0 E$ hexogenous sources, nonpituitary gonadotropin stim-. e% V( f' H, f
ulation, and rare activating mutations.3 Virilizing4 t2 r3 a5 k+ Y- I U$ Z
congenital adrenal hyperplasia producing excessive
) l, s8 K! s5 |$ O$ u) cadrenal androgens is a common cause of precocious
8 w9 A. |2 O% [+ N% j" l Q2 P8 Fpuberty in boys.3,4, t1 P. f* F* I# ]
The most common form of congenital adrenal. O* t7 k' Q- b$ L$ Y( {
hyperplasia is the 21-hydroxylase enzyme deficiency.2 f/ T& L4 f# o( [9 U; o
The 11-β hydroxylase deficiency may also result in
3 B7 M$ t6 {. Hexcessive adrenal androgen production, and rarely,1 M2 `, T# l: P) L
an adrenal tumor may also cause adrenal androgen! M! V0 s( G3 E p) V
excess.1,3, A; B) M, t( w1 ^8 ?% l
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 _& |9 s: Z) m" p, Q# _5 m
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
8 k! k; U, X5 h1 x, Q/ oA unique entity of male-limited gonadotropin-
" P3 h: _. X3 c8 W' v) d3 ?! x7 sindependent precocious puberty, which is also known" e! X3 R) ^6 o3 L o6 c
as testotoxicosis, may cause precocious puberty at a
8 S. ~* e ]1 K+ e, kvery young age. The physical findings in these boys
3 a9 J: L( o2 E3 kwith this disorder are full pubertal development,) c7 B( v7 h1 ~7 q& K. l i+ ~
including bilateral testicular growth, similar to boys) B8 ?# s+ M( o6 A0 s
with CPP. The gonadotropin levels in this disorder" m/ R$ f5 o* Y+ t6 S2 l
are suppressed to prepubertal levels and do not show
3 M5 K# v6 g* J- @* e" Q7 upubertal response of gonadotropin after gonadotropin-
, U) s8 x' z a J+ }, q/ areleasing hormone stimulation. This is a sex-linked
" c* I6 I+ L) Y" Cautosomal dominant disorder that affects only `$ [' Z# ]6 F& B2 h
males; therefore, other male members of the family
Y) X% [! `2 k% g0 {8 M9 t: kmay have similar precocious puberty.3$ |0 u3 g+ q$ }. v( ]" v
In our patient, physical examination was incon-
9 D0 Y8 s0 v l! m1 A$ N5 ?sistent with true precocious puberty since his testi-1 ]5 L- H J, G/ d+ y' Q
cles were prepubertal in size. However, testotoxicosis8 A7 r5 \4 G6 G3 m' l8 F
was in the differential diagnosis because his father# M) F2 l( ]& p( p$ R* r) _! D1 `9 X
started puberty somewhat early, and occasionally,6 J' b+ t: O. P7 q3 U4 ?
testicular enlargement is not that evident in the; Y5 l8 n q3 A7 s3 G, h* Q5 e
beginning of this process.1 In the absence of a neg-
: f2 ?7 r2 Y6 _! [, xative initial history of androgen exposure, our
* X5 g; a. r* c8 B6 r8 kbiggest concern was virilizing adrenal hyperplasia,
- g( e+ T- [6 |: A0 I' O, }- weither 21-hydroxylase deficiency or 11-β hydroxylase0 Z- B* ]4 j; v- s% K9 `% F
deficiency. Those diagnoses were excluded by find-; W1 W! o) ^, J0 s8 G; ^" c
ing the normal level of adrenal steroids.; } G4 ]) @) u( X8 O
The diagnosis of exogenous androgens was strongly
* ~% o) b& Q$ ~, A Ysuspected in a follow-up visit after 4 months because9 z9 \9 Z7 V, G4 D! o, \
the physical examination revealed the complete disap-
% ?4 j. l- U+ F! `pearance of pubic hair, normal growth velocity, and
! u) t6 b) T0 ]& Ddecreased erections. The father admitted using a testos-
% P6 h1 Y2 v$ v$ bterone gel, which he concealed at first visit. He was; m. o8 b% s3 M8 z: D. ` b; f# Y, |
using it rather frequently, twice a day. The Physicians’
7 b+ u3 {( w4 s# \Desk Reference, or package insert of this product, gel or
: \9 }4 u* M8 O" i! |1 Bcream, cautions about dermal testosterone transfer to7 ~+ k; X# g9 T* F
unprotected females through direct skin exposure.
' D' n3 {3 a- C6 CSerum testosterone level was found to be 2 times the1 z1 R) _& b( @* b8 g5 u
baseline value in those females who were exposed to
: E0 N* M3 O8 @even 15 minutes of direct skin contact with their male
. [- t& A1 D! ~9 W& epartners.6 However, when a shirt covered the applica-
$ S7 Z" `/ F8 S3 y5 J2 Ption site, this testosterone transfer was prevented.; c/ M" |4 b' J' g' F
Our patient’s testosterone level was 60 ng/mL,4 P1 B& O2 F6 u& U
which was clearly high. Some studies suggest that5 k# L( ^" _) J0 e) B. l
dermal conversion of testosterone to dihydrotestos-
8 D, h: s7 I+ N5 j3 E/ Vterone, which is a more potent metabolite, is more
% r5 w. w* M: C/ T( @: U5 [1 D/ bactive in young children exposed to testosterone
/ J) P& m( l; |+ v9 yexogenously7; however, we did not measure a dihy-8 Z% a3 b7 ~ ?- K3 p
drotestosterone level in our patient. In addition to! r% y+ Z; K' a& E' f
virilization, exposure to exogenous testosterone in
0 m l( e V/ M! T8 G3 ochildren results in an increase in growth velocity and8 M7 \. p2 Y* G2 {7 z* ~8 C! N
advanced bone age, as seen in our patient.+ N& k# c8 b) x* L
The long-term effect of androgen exposure during9 j' X' c: ^: j# o; q
early childhood on pubertal development and final) c3 h9 r* n, e0 p4 {3 r: _
adult height are not fully known and always remain( B5 B+ V2 z. a3 |& e7 D: t+ ?/ w
a concern. Children treated with short-term testos-
: V/ S T9 L6 m/ c* Z+ U sterone injection or topical androgen may exhibit some" G& _6 D2 W x: @) |. o A
acceleration of the skeletal maturation; however, after+ P, r3 e: Z2 Z. ^) V9 O
cessation of treatment, the rate of bone maturation! ^) @/ w. e( Z/ {8 ]
decelerates and gradually returns to normal.8,93 s$ X% A+ t! o- Z2 \
There are conflicting reports and controversy q9 t5 k, G3 b( o f& H
over the effect of early androgen exposure on adult
) I8 d# x4 V! H5 @* {! m' M* G% Apenile length.10,11 Some reports suggest subnormal2 w8 K. _4 o! {. j% T
adult penile length, apparently because of downreg-
4 V# f1 ]/ D$ w. M% W/ ]' Julation of androgen receptor number.10,12 However,
% w- K2 g# |, V- V' HSutherland et al13 did not find a correlation between; `6 W+ a+ w5 R* n( |) b
childhood testosterone exposure and reduced adult1 H1 D7 W/ Q' b9 B. Z
penile length in clinical studies.
; }( L& ] H5 ZNonetheless, we do not believe our patient is
o3 w/ R/ K. z1 Q/ e6 wgoing to experience any of the untoward effects from. g+ I! |5 b" ~
testosterone exposure as mentioned earlier because0 j; i I& T9 q; P
the exposure was not for a prolonged period of time.2 Y0 e4 D: G4 Y/ v2 R
Although the bone age was advanced at the time of* {% V* z& p7 ?% {, s: B0 M' z
diagnosis, the child had a normal growth velocity at; D# |, i$ E8 a8 S
the follow-up visit. It is hoped that his final adult: t+ G! ]4 x* v' X" i* u
height will not be affected.8 q2 }! E/ `0 J
Although rarely reported, the widespread avail-
5 V6 P/ [' b) m" pability of androgen products in our society may; V% u4 \2 T$ M' [' [
indeed cause more virilization in male or female1 J8 B2 q: {. J0 Y8 r7 [+ k
children than one would realize. Exposure to andro-* j( e7 h/ k9 z+ J! [2 A
gen products must be considered and specific ques-4 B) X; t% J2 d
tioning about the use of a testosterone product or, J9 ?- H8 C/ T1 S: I8 Z/ L
gel should be asked of the family members during) w) G5 {+ r! @5 m5 u4 f, F6 }
the evaluation of any children who present with vir-; U3 @: d' }3 I. J8 I# m
ilization or peripheral precocious puberty. The diag-
* Q6 ` K1 { \5 X% F+ mnosis can be established by just a few tests and by
% t8 L# Q; e: u+ Oappropriate history. The inability to obtain such a: e1 _4 V( u$ e( q
history, or failure to ask the specific questions, may
" j8 E* }: D# U7 V; A' O2 {result in extensive, unnecessary, and expensive
+ n% F, e8 A5 |5 pinvestigation. The primary care physician should be. K# c- I$ }( Z
aware of this fact, because most of these children1 C7 Q F. ^5 }: w( ?
may initially present in their practice. The Physicians’
; P( ^9 N* h: v4 `) d3 |( ?$ DDesk Reference and package insert should also put a
* a+ T6 w( p: c: z3 n4 Fwarning about the virilizing effect on a male or
K7 h* e! {; A4 X( A% P1 z6 ?female child who might come in contact with some-- } h+ t1 ~, F8 u$ t
one using any of these products.
* M& O% i/ l. I% d3 ^References: e7 }8 g0 z) j& f9 B
1. Styne DM. The testes: disorder of sexual differentiation+ X: K- f' k# G% e' w
and puberty in the male. In: Sperling MA, ed. Pediatric' y% R" l' l1 z U2 G2 V5 Y7 j0 P
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;' x5 V2 h! F# G5 O
2002: 565-628.- D* _' ]; ]8 \
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious( z6 g7 m# x% B' t
puberty in children with tumours of the suprasellar pineal; ?% S9 E* P- { {. o* f+ O, J, ?
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from$ c- R: ]9 {9 D' @
Topical Testosterone Exposure / Bhowmick et al 543
+ y2 g/ E$ H4 ^+ J( ^; oareas: organic central precocious puberty. Acta Paediatr." x! T" E8 u e% G
2001;90:751-756.
, t$ T0 o! z% c5 E/ o# @) l Y* S j3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
1 x& D2 g0 H. A5 S* EPediatric Endocrinology. 4th ed. New York, NY: Marcel
$ [( G3 J. ^8 U5 e& {Dekker Inc; 2003:211-238.6 i* [) i1 Z- ~, }( S, _( g
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual) h t. D& }, y4 j" W! |) G
development in a two-year-old boy induced by topical
+ ]; o% m# Z+ Hexposure to testosterone. Pediatrics. 1999;104:e23.
1 U0 S0 \3 \- E5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
2 l3 H ~- Z- E+ \7 OSkeletal Development of the Hand and Wrist. 2nd ed.9 y; D) _3 ]9 Q2 ~1 p
Stanford, CA: Stanford University Press; 1959.9 o# ~8 A. p4 e6 ~5 | S3 A6 g2 u( X* s8 I
6. Physicians’ Desk Reference. Androgel 1% testosterone,8 s! M7 U* ?* o& _( h6 g
Unimed Pharmaceutical Inc. Montvale, NJ: Medical" W& m6 N5 N6 Z* X
Economics Company, Inc; 2004:3239-3241.
, ?/ M, k, {3 S; H' j7 [8 I+ ?! ?, u* e7. Klugo RC, Cerny JC. Response of micropenis to topical
! d6 B1 Q) f& c0 Dtestosterone and gonadotropin. J Urol. 1978;119:, R- j9 p' S3 X* n
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