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is a significant concern for physicians. Central
. O0 n# E0 c$ ~" Z$ A$ c; jprecocious puberty (CPP), which is mediated+ B' W% [; g9 \; ~( U# E
through the hypothalamic pituitary gonadal axis, has4 \2 C+ `8 ?' V6 Y6 J
a higher incidence of organic central nervous system
9 o: U. L1 y8 j$ A+ U& }lesions in boys.1,2 Virilization in boys, as manifested, y ^- |/ k) l0 o7 ~4 _$ b
by enlargement of the penis, development of pubic3 u8 W& P/ d2 \" `. I7 A: g2 i
hair, and facial acne without enlargement of testi-) x; S! \; `, Q: I# d) H
cles, suggests peripheral or pseudopuberty.1-3 We
1 c: {; o0 D. x6 C& {1 Xreport a 16-month-old boy who presented with the
# k$ V3 ?, r, E: d1 aenlargement of the phallus and pubic hair develop-. z0 L9 p5 |- e6 x0 P7 s
ment without testicular enlargement, which was due3 x1 J: n% {; v! w$ K: c
to the unintentional exposure to androgen gel used by: W# N( o# v6 q/ B' B& R" h- b
the father. The family initially concealed this infor-5 D; z9 L6 \, h+ G# _: f& M( U
mation, resulting in an extensive work-up for this4 _2 r C4 Q0 |$ d
child. Given the widespread and easy availability of
1 N" Y' s& J/ n* _4 ptestosterone gel and cream, we believe this is proba-7 K% Y0 X6 o, E m% g0 c3 t2 ~
bly more common than the rare case report in the
5 N9 `( B9 ^* Aliterature.4+ J# b: X0 w# o2 Q: J& z; }! R
Patient Report
, L% c; v$ X O, Q% RA 16-month-old white child was referred to the, J5 P4 t' } Z8 }( @
endocrine clinic by his pediatrician with the concern- \; R, I# c- p
of early sexual development. His mother noticed
5 x2 ^. J% f! p, _2 b4 Glight colored pubic hair development when he was3 z& F: O$ z4 L# f& l+ Y3 ~
From the 1Division of Pediatric Endocrinology, 2University of
" I6 G! C" I8 z( k/ @% D: s! HSouth Alabama Medical Center, Mobile, Alabama., m$ {. p, Q8 F3 [) T
Address correspondence to: Samar K. Bhowmick, MD, FACE,+ ~# [9 z/ L$ I8 K p Z! }% y
Professor of Pediatrics, University of South Alabama, College of v( p/ D/ b3 l- Y* x
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;' H/ y- Y H4 a0 t$ B r
e-mail: [email protected].
" L: a4 t. G2 O7 Fabout 6 to 7 months old, which progressively became7 y' M5 r" i/ {* S
darker. She was also concerned about the enlarge-) G5 H% P& g5 ^! b
ment of his penis and frequent erections. The child
- G( l9 v. O& J$ U! Pwas the product of a full-term normal delivery, with( e/ v P# U) S: w$ u
a birth weight of 7 lb 14 oz, and birth length of! O# C0 X3 z/ g" x- `
20 inches. He was breast-fed throughout the first year
3 }9 e# j+ ^( J' _ N$ u* Sof life and was still receiving breast milk along with# I! n! t+ d' x/ P: W
solid food. He had no hospitalizations or surgery,# {6 N8 F+ Q! h8 d9 y+ u$ R B% F
and his psychosocial and psychomotor development, R* n) d- b& }# o
was age appropriate.
" v3 F* b# P; |5 cThe family history was remarkable for the father,
% `" Q4 O e9 O/ E5 X9 x6 p, fwho was diagnosed with hypothyroidism at age 16,
; V' z# [+ i7 K3 x9 iwhich was treated with thyroxine. The father’s
1 c) w' G" [# Q4 [; Z3 I" \height was 6 feet, and he went through a somewhat# b# }/ q$ g6 V5 h5 D
early puberty and had stopped growing by age 14.& U9 C: f, G6 Z; V! K! R/ t8 @8 U
The father denied taking any other medication. The
) \/ R6 r0 K* ychild’s mother was in good health. Her menarche1 ~% e4 R+ g( [8 O6 W$ H
was at 11 years of age, and her height was at 5 feet
4 b+ }1 Z3 ^9 o5 inches. There was no other family history of pre-# q) p6 l2 B6 |. ^; O
cocious sexual development in the first-degree rela-
; ~- H9 x) {1 Z. _3 _tives. There were no siblings.
1 |; L/ H. x. ^% g" u+ s# EPhysical Examination
% ~% p: E' @5 x9 r$ A) Y) n9 GThe physical examination revealed a very active,
) E% }. L* m8 _2 uplayful, and healthy boy. The vital signs documented1 x: ^! L [9 N0 E* m9 a: f
a blood pressure of 85/50 mm Hg, his length was
% V: [# Y) w* t1 X0 [90 cm (>97th percentile), and his weight was 14.4 kg
2 [7 r! j3 T) b% F3 [0 t8 h(also >97th percentile). The observed yearly growth5 w F0 e/ n- E' {) ^
velocity was 30 cm (12 inches). The examination of
+ F b3 i V) Xthe neck revealed no thyroid enlargement.: X! U& m# o0 q, s) i
The genitourinary examination was remarkable for9 S+ @% U, p' X
enlargement of the penis, with a stretched length of6 _; z0 d C( X4 G7 `$ K
8 cm and a width of 2 cm. The glans penis was very well
4 l W8 Z- I# X1 ?9 d$ J; Ndeveloped. The pubic hair was Tanner II, mostly around; e* t4 e7 U- i, u
540: [, J6 M. T3 v1 T3 s/ g1 N
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
5 {; w# i+ H8 I4 w& I) p, Lthe base of the phallus and was dark and curled. The# y6 c4 B H9 t0 ]7 Y1 D- c
testicular volume was prepubertal at 2 mL each.# B% A1 P }! u5 l5 F& ~% u" y+ a5 h
The skin was moist and smooth and somewhat) c7 a4 }( n) @; V4 \6 v. ?8 S+ \
oily. No axillary hair was noted. There were no& N* l0 g u; w+ p$ Y
abnormal skin pigmentations or café-au-lait spots.
& I4 A K. k; l" D( X3 _ O9 ?Neurologic evaluation showed deep tendon reflex 2+. q8 i8 X% F3 S6 Y' D; }
bilateral and symmetrical. There was no suggestion
! Q# A1 h/ m" x: R; s) b# xof papilledema.0 `9 c# y" }" A/ K$ c
Laboratory Evaluation
0 X+ F" X. p3 ]3 x' u( ^7 |5 E7 kThe bone age was consistent with 28 months by4 D( q1 y/ {% ~" b _) V
using the standard of Greulich and Pyle at a chrono-# U0 [9 {5 g! ^: q
logic age of 16 months (advanced).5 Chromosomal( ?" T# C' S, m- L/ t/ T/ T
karyotype was 46XY. The thyroid function test# o9 u" m. V$ c8 S: p! A4 i
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
; h; ?" ]' X( q+ E5 S9 alating hormone level was 1.3 µIU/mL (both normal).' y+ z: W! {. V: ` z
The concentrations of serum electrolytes, blood
% @" T( Z* K; S @urea nitrogen, creatinine, and calcium all were# L6 g8 T! |* \* y) S" s
within normal range for his age. The concentration
/ Y) b, x3 A0 I) L( F/ {% o' Wof serum 17-hydroxyprogesterone was 16 ng/dL
8 n0 L& G4 O6 ?, Y2 T(normal, 3 to 90 ng/dL), androstenedione was 20
1 c/ ` r6 \1 { ung/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
4 b/ d7 A6 I$ E/ T* y& oterone was 38 ng/dL (normal, 50 to 760 ng/dL), Y6 Z3 h5 l" A. o+ p+ C2 j
desoxycorticosterone was 4.3 ng/dL (normal, 7 to7 h$ a5 E- L# [" L& k% V
49ng/dL), 11-desoxycortisol (specific compound S)" x) g5 L; j" p
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
: c& C0 W/ j" P Ttisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total/ a# [! p7 l* ^5 t. r4 e0 C; D" A7 R
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
- `; ?) g( U* c6 Aand β-human chorionic gonadotropin was less than: X6 `0 @0 l. l P) q' x" Z4 m+ U) l$ w
5 mIU/mL (normal <5 mIU/mL). Serum follicular, H( Y$ P7 I' @% {, I' k; E9 [
stimulating hormone and leuteinizing hormone* h. M/ X. x! @/ C+ B; ~ W0 y
concentrations were less than 0.05 mIU/mL" _- h( M1 F$ B/ J; a$ m l2 c' ?
(prepubertal).
4 N: B1 I& p) f1 P$ n8 } Q. I, BThe parents were notified about the laboratory3 d" n# f: f7 k5 p; S
results and were informed that all of the tests were5 m. Z& P) W# T2 `1 G, \
normal except the testosterone level was high. The
# i! Z. V2 p* p/ F+ |5 c; xfollow-up visit was arranged within a few weeks to
; U" t1 D$ T. u0 s1 y( g. Kobtain testicular and abdominal sonograms; how-
! T6 H, S, w3 ?* dever, the family did not return for 4 months.8 X; f' J G: t# X. D3 |
Physical examination at this time revealed that the
5 m/ Q$ g( f* Y Dchild had grown 2.5 cm in 4 months and had gained
3 b2 d/ \) _" K5 }/ v2 kg of weight. Physical examination remained
- E. U$ L9 N5 @. ^' a( R, a; p8 punchanged. Surprisingly, the pubic hair almost com-+ d4 l+ U9 I% s" b3 }
pletely disappeared except for a few vellous hairs at# Y5 ~ l0 w8 F
the base of the phallus. Testicular volume was still 2
8 v4 {5 @' N. n& ]1 cmL, and the size of the penis remained unchanged.8 M( M5 n% Z0 e8 w# d
The mother also said that the boy was no longer hav-9 p: E# U9 j) ]1 q( e1 i) e
ing frequent erections.
1 e+ |: ]: ~# U+ o8 ^8 K: iBoth parents were again questioned about use of
' ?4 O( |! g6 I, n u6 Gany ointment/creams that they may have applied to
7 }' k+ j% z, E- Qthe child’s skin. This time the father admitted the4 p. r+ ^" b8 L; b T! h5 o, m
Topical Testosterone Exposure / Bhowmick et al 541( d6 A5 n7 `: j* i
use of testosterone gel twice daily that he was apply-
! G9 l) p- X$ ?/ u P; l& |& ping over his own shoulders, chest, and back area for# z( y- ]$ l0 n8 v8 h+ P; n
a year. The father also revealed he was embarrassed6 j2 Y+ V. k2 b3 b7 [- O! T! k
to disclose that he was using a testosterone gel pre-
2 R/ o, ^: m+ c* E# }scribed by his family physician for decreased libido
2 }* C+ t4 @) n( N+ d( psecondary to depression.8 z! T0 o0 D2 `. ?' a
The child slept in the same bed with parents.) F, u) D8 R" s5 }
The father would hug the baby and hold him on his X9 x6 Q6 M5 u F
chest for a considerable period of time, causing sig-
s! j+ o# E2 H$ Bnificant bare skin contact between baby and father.* L2 V2 {2 s$ I2 g5 F" j, }
The father also admitted that after the phone call,9 G, H" B) Y, O2 Y' E' D# _, i4 u
when he learned the testosterone level in the baby B# i* C( D6 Z
was high, he then read the product information
& [ k0 h' E2 [; \% npacket and concluded that it was most likely the rea-
: q+ n# K; U2 z( rson for the child’s virilization. At that time, they
! V6 W- ~4 O7 y" H& D* P' Rdecided to put the baby in a separate bed, and the
% u: B6 l4 S% W3 _father was not hugging him with bare skin and had0 R, o# r4 K- ~
been using protective clothing. A repeat testosterone1 ~! o* O: h+ D4 E n
test was ordered, but the family did not go to the
$ S$ j& W5 k% z: h' Llaboratory to obtain the test.. e; i3 t* Y/ k x3 t8 |! @
Discussion
% l; a# M1 C' f, CPrecocious puberty in boys is defined as secondary
K: z- v; r1 E! K) psexual development before 9 years of age.1,4
' U1 m; P# h, \2 F* e. SPrecocious puberty is termed as central (true) when
+ _1 J8 q; e- E% L( dit is caused by the premature activation of hypo-3 v4 L( e0 {) I: j$ V, K) z! y! K
thalamic pituitary gonadal axis. CPP is more com-
* f2 ]0 N; V4 pmon in girls than in boys.1,3 Most boys with CPP7 Z: A' K8 ^. k" Q P' M' i4 s2 G
may have a central nervous system lesion that is
1 ]' u; V, ~! X7 rresponsible for the early activation of the hypothal-- r3 V' v- _, F* A5 v& _
amic pituitary gonadal axis.1-3 Thus, greater empha-1 R# J& V! ?' x# f0 M8 V6 Z5 l
sis has been given to neuroradiologic imaging in
6 {1 ^, e! I5 i! Xboys with precocious puberty. In addition to viril-
2 k% r( f; o5 @) J+ dization, the clinical hallmark of CPP is the symmet-" |# l z" t6 | F( l* x
rical testicular growth secondary to stimulation by( S- M3 y1 N. h9 S
gonadotropins.1,3
( u: D& }( _8 k' X; J- KGonadotropin-independent peripheral preco-
: S3 e0 U) F; Jcious puberty in boys also results from inappropriate
6 D2 s9 Q: F5 X B) l; ?7 h4 D' {androgenic stimulation from either endogenous or
! T2 \3 E8 Y+ |* v+ b3 V# R# R: Vexogenous sources, nonpituitary gonadotropin stim-+ T: _3 y% B3 M) C9 ?6 L3 N
ulation, and rare activating mutations.3 Virilizing5 G5 n/ a" |' t8 h" ~8 m
congenital adrenal hyperplasia producing excessive4 K# P2 z/ \0 {
adrenal androgens is a common cause of precocious" c. I. B5 j. H$ q4 j1 H+ w
puberty in boys.3,43 r7 Y8 Q/ A& n; N) @8 l9 s# Y
The most common form of congenital adrenal2 s0 |: ?* p {
hyperplasia is the 21-hydroxylase enzyme deficiency.; S5 F! D+ I; h; e7 {
The 11-β hydroxylase deficiency may also result in
& @, a* E# S% B9 R7 z7 ~" F5 ?excessive adrenal androgen production, and rarely,) [! U d4 H: a! d9 O i
an adrenal tumor may also cause adrenal androgen3 _" f$ p5 m; W" f- G
excess.1,3* [. y1 M: D0 J" a1 W- j
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. w2 {/ t- a A; g$ e8 _; j
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
# P" @, Y& u/ L6 s% C" N9 KA unique entity of male-limited gonadotropin-2 I. R! [% b) ^. k" t" e
independent precocious puberty, which is also known
; S% j+ i! J0 }# G% B3 D6 w4 Aas testotoxicosis, may cause precocious puberty at a' ]2 \8 A' }, r
very young age. The physical findings in these boys
8 T$ K1 s) Q. ~8 Owith this disorder are full pubertal development,: z1 B1 o) a4 y- o
including bilateral testicular growth, similar to boys
( t% i' U/ c& F) ?9 w7 Z7 \8 d$ J( ]with CPP. The gonadotropin levels in this disorder
. g% c) ~( ?% O6 [8 ?4 S+ r, _0 V: lare suppressed to prepubertal levels and do not show9 `& t) x! F3 }" `' {
pubertal response of gonadotropin after gonadotropin-
9 z1 A+ M, v1 T! Ureleasing hormone stimulation. This is a sex-linked! g, ^0 z: U4 y5 @
autosomal dominant disorder that affects only; c2 d4 |9 T9 j1 i: Q
males; therefore, other male members of the family& a, |1 l) `$ S. n, O1 h2 t" \9 h
may have similar precocious puberty.3
; h* H+ Y" _8 M4 y: JIn our patient, physical examination was incon-
4 i/ M, }# n! ssistent with true precocious puberty since his testi-2 G* _% \+ e$ A
cles were prepubertal in size. However, testotoxicosis
" j( Z5 L. u0 b6 E; Swas in the differential diagnosis because his father+ u; k: [6 K @8 U j' r
started puberty somewhat early, and occasionally,
8 S# A) g0 o/ b9 y4 P; ~testicular enlargement is not that evident in the
( b/ g+ W& @: |: w; z) qbeginning of this process.1 In the absence of a neg-
* a9 i! U" X; J% b9 U2 u9 Zative initial history of androgen exposure, our
) \ d, Q* Z/ l) v' ]* pbiggest concern was virilizing adrenal hyperplasia,
8 P( l: e* `) C' w% B/ Q Eeither 21-hydroxylase deficiency or 11-β hydroxylase2 ?$ O: T' c [/ q9 G6 B* [0 O
deficiency. Those diagnoses were excluded by find-: ]/ h' E! f! c2 K
ing the normal level of adrenal steroids.) t! x4 U, t0 B( W' ]+ T% J
The diagnosis of exogenous androgens was strongly' k% X4 k2 _0 d/ S
suspected in a follow-up visit after 4 months because+ X' y3 t/ V- b' G& a/ q; [
the physical examination revealed the complete disap-
5 ?8 z- F# v: z" B* ]3 h3 tpearance of pubic hair, normal growth velocity, and
( w& N2 C5 c9 ^decreased erections. The father admitted using a testos-6 J& R3 J9 X7 i5 u! S9 W
terone gel, which he concealed at first visit. He was- C5 r; H9 j6 l& }- _8 L7 X- r
using it rather frequently, twice a day. The Physicians’$ d! ~$ a7 x ~$ ?! I1 B+ i
Desk Reference, or package insert of this product, gel or& W2 |$ b! m4 c
cream, cautions about dermal testosterone transfer to o. ~" z' Z: Z8 R
unprotected females through direct skin exposure.
' t% m) u. [- r, ISerum testosterone level was found to be 2 times the
4 @. L& O. @& ~7 M m/ b4 _7 gbaseline value in those females who were exposed to: G) l" |: Q. y
even 15 minutes of direct skin contact with their male
; j: w7 |6 Q @9 i0 f. f( Epartners.6 However, when a shirt covered the applica-
" i- o. G9 ~0 U/ k" `* ytion site, this testosterone transfer was prevented.8 z$ i/ {2 z5 B0 s' ^+ i0 o
Our patient’s testosterone level was 60 ng/mL,; F8 N6 X! i8 z' C
which was clearly high. Some studies suggest that: x- }6 c/ l4 s/ h+ Z. o/ {
dermal conversion of testosterone to dihydrotestos- ?( H. ^/ h- [" L
terone, which is a more potent metabolite, is more
M5 k: g5 d1 G$ j' hactive in young children exposed to testosterone( R& R3 n# C$ ~# C2 o
exogenously7; however, we did not measure a dihy-2 V8 z1 j( v5 d2 ?" S6 J# Z
drotestosterone level in our patient. In addition to: b& s7 W' h! ]- r2 g9 S0 c! I
virilization, exposure to exogenous testosterone in& [% e3 S. j0 r/ S: N
children results in an increase in growth velocity and
' c% e% g! u! R k) e' [" Wadvanced bone age, as seen in our patient.
# ]$ B, o5 I, u6 u) o0 ~ B( GThe long-term effect of androgen exposure during! A! |) x- t$ i$ G7 v: O: S
early childhood on pubertal development and final
2 I0 | q: R0 Eadult height are not fully known and always remain+ m- s: j: x+ f" j- L% r
a concern. Children treated with short-term testos-2 `' a1 ]) S: f3 z) o4 O
terone injection or topical androgen may exhibit some
* {7 X5 {: Z4 o! a: G- B4 kacceleration of the skeletal maturation; however, after
) m) N) n+ B7 Y* Z- d# ucessation of treatment, the rate of bone maturation
1 }/ E% B8 N/ r3 `. d# Cdecelerates and gradually returns to normal.8,9: e! \6 s5 q& y( n$ s$ Q% e0 Y
There are conflicting reports and controversy
# `& K/ R& ~, ^/ q% Iover the effect of early androgen exposure on adult
. ^7 T Y& L+ Mpenile length.10,11 Some reports suggest subnormal
1 B# a/ H' d5 N" p8 Hadult penile length, apparently because of downreg-7 U' a6 X7 ^% p4 J6 |- P" o& h6 ~
ulation of androgen receptor number.10,12 However,, m3 i! ?0 }1 X! k% f! |# X' A( y
Sutherland et al13 did not find a correlation between
w6 w9 o3 r2 \* a. Schildhood testosterone exposure and reduced adult
, g" u) @8 M7 L) r- Q3 \% spenile length in clinical studies.
8 [7 b4 m: g2 XNonetheless, we do not believe our patient is
4 C" q: \+ R C0 W0 \1 c2 Wgoing to experience any of the untoward effects from
$ U Z6 W% n& {. j0 Ftestosterone exposure as mentioned earlier because
% y. A% l1 W/ o3 Bthe exposure was not for a prolonged period of time.
, N; a2 `4 f6 s- ?/ CAlthough the bone age was advanced at the time of$ I4 _$ Z, h5 n7 e' p6 X, @- p
diagnosis, the child had a normal growth velocity at9 n& v- g' ^" o8 t$ H K
the follow-up visit. It is hoped that his final adult# Y5 w0 e2 {; ^% L p
height will not be affected.
3 |3 Z* C# G! y8 [Although rarely reported, the widespread avail-" F$ M6 Q+ h4 T5 ]
ability of androgen products in our society may
2 S8 P2 u* ~* a, o4 Tindeed cause more virilization in male or female$ G* w! G& g. w+ `
children than one would realize. Exposure to andro-
! U7 N! Z! _# k, G& E7 _8 K, cgen products must be considered and specific ques-' S4 a+ q5 _3 q& Z# E/ W
tioning about the use of a testosterone product or# v+ }: ] ^ v6 u
gel should be asked of the family members during. Q# R6 _# v- k8 p6 ~
the evaluation of any children who present with vir-
) G3 j- |; w5 Q- p, gilization or peripheral precocious puberty. The diag-
, r) g- {3 n/ enosis can be established by just a few tests and by
% U: \! g- f! `" G3 t( I, oappropriate history. The inability to obtain such a
* u9 F' j& A$ whistory, or failure to ask the specific questions, may
7 [) j7 y6 x% D. j; J3 |result in extensive, unnecessary, and expensive
8 r& ^( e* E k5 v1 i, W0 pinvestigation. The primary care physician should be/ Y* V+ R. x C
aware of this fact, because most of these children N7 s- {7 o7 d/ Z1 q/ A+ r
may initially present in their practice. The Physicians’2 t o0 x% J# C/ `. b/ d- o
Desk Reference and package insert should also put a
0 ?+ I% h$ a# i* P- M3 u# g' fwarning about the virilizing effect on a male or+ n% W* x# ?* y! \) m. J" u9 G
female child who might come in contact with some-
2 d x% B/ Q; b! z1 zone using any of these products.
" @' a5 N, J+ v3 p6 vReferences! B4 ^, b1 W7 a3 F! K: w7 ?
1. Styne DM. The testes: disorder of sexual differentiation) T# ^4 A! v; Q- s
and puberty in the male. In: Sperling MA, ed. Pediatric
7 }' f2 ?- ?0 @% i' j y7 VEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
& \1 G# ?' E2 R) D6 m4 `2002: 565-628.
+ p0 g8 X! ^- p$ I, _2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
" B" e F$ }) r. O$ fpuberty in children with tumours of the suprasellar pineal
5 y1 g8 B; P5 ?. O0 L% h' kat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 \9 C# ~+ u6 d" u' n
Topical Testosterone Exposure / Bhowmick et al 543) T% X$ B6 r0 f, a5 }) ]. I8 w: t
areas: organic central precocious puberty. Acta Paediatr.
+ T* \+ o% O8 U* |2001;90:751-756.
7 B) [* f" }/ }8 R3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.! z: M5 F1 Y" ]% l, l' X8 C6 A/ O% x6 f
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
$ v a& n Z( l: X7 ~4 b' K) jDekker Inc; 2003:211-238.9 G: B* U. V1 ~8 C! c% r
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual" C- g' ]. b. J' t5 u0 \
development in a two-year-old boy induced by topical
2 g# M2 A. m# sexposure to testosterone. Pediatrics. 1999;104:e23.
, C1 X$ Q% I+ D/ x y5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
; G: k4 y) P6 A; ~Skeletal Development of the Hand and Wrist. 2nd ed.* u; `* O2 @7 ^4 ?8 a& W7 o: P
Stanford, CA: Stanford University Press; 1959.
; t$ u" |' E. F8 O: S0 c6. Physicians’ Desk Reference. Androgel 1% testosterone,
" Q: a" D2 s) S4 i) a# ^Unimed Pharmaceutical Inc. Montvale, NJ: Medical; {/ @ N5 U5 n/ h, _; ]- D4 l
Economics Company, Inc; 2004:3239-3241.9 F' v! r- G& N5 j, Q/ J
7. Klugo RC, Cerny JC. Response of micropenis to topical- E2 b" V: m' [% T" I8 e) f) t
testosterone and gonadotropin. J Urol. 1978;119:
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