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is a significant concern for physicians. Central6 c) ]2 H; V: b. k7 A6 V$ z4 m0 V
precocious puberty (CPP), which is mediated
- q+ z/ H- C4 N6 W* W/ othrough the hypothalamic pituitary gonadal axis, has: i2 R ?9 y2 r% l% w
a higher incidence of organic central nervous system7 g9 D* `/ E, {! W
lesions in boys.1,2 Virilization in boys, as manifested
2 f$ r5 q$ q& `0 c7 qby enlargement of the penis, development of pubic3 ^7 i; @* ], a5 l
hair, and facial acne without enlargement of testi-5 p4 l* d9 O6 ]
cles, suggests peripheral or pseudopuberty.1-3 We) i0 e* w* T5 ] h
report a 16-month-old boy who presented with the
2 |; m- | F4 w! uenlargement of the phallus and pubic hair develop-( ]0 s5 M$ r/ o
ment without testicular enlargement, which was due, a( ^: r2 R s* L; I+ G7 n, X
to the unintentional exposure to androgen gel used by0 x& p& k) X5 G8 `
the father. The family initially concealed this infor-
}8 J) r, R: U0 h7 imation, resulting in an extensive work-up for this! X/ P: V0 A4 h/ C7 S
child. Given the widespread and easy availability of
% d. t) P- f1 d. b2 ?- K0 ztestosterone gel and cream, we believe this is proba-: v& p& Y; T) ~8 {4 K
bly more common than the rare case report in the; ]# V: ?0 z+ m3 t$ q; `
literature.4
, U) n! ^% I! B: z5 U1 m8 yPatient Report
9 j- \/ i- _( ~' |- pA 16-month-old white child was referred to the
* f/ c! ?6 j8 n/ Z r9 }* oendocrine clinic by his pediatrician with the concern
6 d. K" | o5 I7 j t1 [' Sof early sexual development. His mother noticed
6 G" G6 o+ B' P& I( X0 plight colored pubic hair development when he was
1 s2 |4 ~% R! V; s# G# DFrom the 1Division of Pediatric Endocrinology, 2University of
& a- ? c8 Z4 u8 a+ A+ m: XSouth Alabama Medical Center, Mobile, Alabama.7 Y- \# m2 T) u& o
Address correspondence to: Samar K. Bhowmick, MD, FACE,9 S' s* `/ P. |0 ` l* J
Professor of Pediatrics, University of South Alabama, College of( n$ H) |6 g/ r& ~4 C
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;- ` v9 I, g1 D( [" H' `' ]. ]' A
e-mail: [email protected].! J/ Q. I6 P3 d
about 6 to 7 months old, which progressively became! I1 p; O& U* \% ^6 r2 g4 W3 N
darker. She was also concerned about the enlarge-
0 C' ]* c( k3 i' Q4 p9 ?% Nment of his penis and frequent erections. The child7 V; e% d7 V8 `; o/ h4 ]" D
was the product of a full-term normal delivery, with
1 A9 {5 D& ?% y+ r- V, ]* `a birth weight of 7 lb 14 oz, and birth length of& h. r7 y. q- C' L8 I% D ]2 R8 f: O1 {
20 inches. He was breast-fed throughout the first year
6 ^; D% j0 s0 @% @2 Z0 c* R6 Eof life and was still receiving breast milk along with
, i* K1 P* K; }5 D, fsolid food. He had no hospitalizations or surgery,
: D. o- W, B4 o7 ^) @; a7 V3 ]. V2 \and his psychosocial and psychomotor development! F w) J5 P8 A# J3 t; n' D: k4 k
was age appropriate.
) E1 Z' P' A, VThe family history was remarkable for the father,! h# B+ X# f/ E) X
who was diagnosed with hypothyroidism at age 16,
% l4 v* X1 b4 k# F- {5 Kwhich was treated with thyroxine. The father’s
4 s; J6 A, V- J7 S2 sheight was 6 feet, and he went through a somewhat
0 v4 y5 s2 o0 f+ z5 G, m8 yearly puberty and had stopped growing by age 14.6 Y) x) r# E$ h; }2 z
The father denied taking any other medication. The
2 @0 `4 E8 ^4 b' c3 J% H) j6 Cchild’s mother was in good health. Her menarche
. F1 e; g: ]2 r% R6 L) [0 v* Qwas at 11 years of age, and her height was at 5 feet$ O. u; ]- Q* p6 S0 _- @3 N4 Y
5 inches. There was no other family history of pre- M, a3 p+ [: A( B* R
cocious sexual development in the first-degree rela-; j2 E Z1 |. l2 R+ B& U
tives. There were no siblings.; o3 H' L% r6 H# H& o F
Physical Examination
# j/ e0 |! y4 DThe physical examination revealed a very active, i* L; Z/ \* L$ L/ K; P
playful, and healthy boy. The vital signs documented
! F( v/ Q4 A- `5 q6 ja blood pressure of 85/50 mm Hg, his length was0 R0 F. S( {2 f7 Z
90 cm (>97th percentile), and his weight was 14.4 kg* N R' o, M2 k
(also >97th percentile). The observed yearly growth& t" C6 S" Y# h3 k& m0 o9 \1 n
velocity was 30 cm (12 inches). The examination of0 b( H$ _0 z3 P
the neck revealed no thyroid enlargement.
I0 G( }# d W% ?2 EThe genitourinary examination was remarkable for% V3 W2 g9 h# u7 J5 c' k$ d& b4 E
enlargement of the penis, with a stretched length of8 E' D# i) m: O G( H; x
8 cm and a width of 2 cm. The glans penis was very well
' n2 \0 S" \3 B, {3 ?developed. The pubic hair was Tanner II, mostly around7 ]2 G3 i1 G: n$ S4 X* l+ f
540
) N9 p8 C7 f9 E# v# \2 }2 d" @* ` f+ s& Dat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" {! i% k& R5 W' r
the base of the phallus and was dark and curled. The
# ^9 z1 ~9 |5 u* utesticular volume was prepubertal at 2 mL each.
C6 `: K. ?5 H2 z, H) `5 `& sThe skin was moist and smooth and somewhat. w& D) ~1 l) ^. z
oily. No axillary hair was noted. There were no
& b* a: I" @8 m' S* ]! \$ ^0 ]abnormal skin pigmentations or café-au-lait spots.
! ~' b5 H6 v3 R, ?$ T3 S3 zNeurologic evaluation showed deep tendon reflex 2+
% S% s9 b% F' @: @bilateral and symmetrical. There was no suggestion: _( u0 K% S7 S2 g$ Z4 e3 Q F
of papilledema.
0 p" b! z3 M, F4 u5 w5 o- X1 H& PLaboratory Evaluation7 e) { N7 P! @) M/ F% s9 y( S9 z
The bone age was consistent with 28 months by! K& @' }, f0 j
using the standard of Greulich and Pyle at a chrono-
, l' m4 _! e. }1 |, @logic age of 16 months (advanced).5 Chromosomal- y& i, a# ^+ r/ {5 T" `, P
karyotype was 46XY. The thyroid function test
& d5 B+ e1 f" I, B) qshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
2 x! e# }0 _- B% {+ |lating hormone level was 1.3 µIU/mL (both normal).8 n& G# K/ t, W. l$ ?* ?
The concentrations of serum electrolytes, blood
( ^ v5 u4 a ~% ^. G% [0 iurea nitrogen, creatinine, and calcium all were
: c5 D! M6 N4 g7 F# p( I8 Z: Vwithin normal range for his age. The concentration
, H3 N3 u$ W! [) ]6 c7 ~! w) ?( aof serum 17-hydroxyprogesterone was 16 ng/dL
7 s' \: r3 g& ]8 g+ k, E0 V s, ~/ P(normal, 3 to 90 ng/dL), androstenedione was 20
8 j; I5 G& q. {ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-; H, x% U2 i. s9 L7 H
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
2 j. X: B8 P+ Ddesoxycorticosterone was 4.3 ng/dL (normal, 7 to
5 ?& k$ p# }7 p' W49ng/dL), 11-desoxycortisol (specific compound S)
) A3 i' I0 r9 fwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
2 \0 X7 b( }- {; `# \3 }tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total& _5 Y) W$ y" _ p
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
7 {# y3 L. y4 N, j7 s8 pand β-human chorionic gonadotropin was less than5 R4 ~6 {' G6 f3 n. V, O' N
5 mIU/mL (normal <5 mIU/mL). Serum follicular
0 z0 a5 ^5 t0 h: H( l3 o# V: Ostimulating hormone and leuteinizing hormone* O5 H5 w, T1 a) |' j8 Y0 B
concentrations were less than 0.05 mIU/mL1 Y4 c, C; _/ K
(prepubertal).
# X# `3 e; B6 i# A4 K/ d9 iThe parents were notified about the laboratory/ A0 o! k$ g/ v
results and were informed that all of the tests were' o% o5 x" s# @
normal except the testosterone level was high. The9 |- t5 `# D* a: r
follow-up visit was arranged within a few weeks to
! ?4 Q$ _) i6 s: w' Dobtain testicular and abdominal sonograms; how-
6 @8 E- |, M9 N& wever, the family did not return for 4 months.
# M! }/ ~* P' Y" LPhysical examination at this time revealed that the
) ^# _( M4 i& X' `) F+ p* I) Rchild had grown 2.5 cm in 4 months and had gained
7 a( O9 {0 @) O9 o( P4 a2 kg of weight. Physical examination remained$ D& E1 D; E: n' |) q
unchanged. Surprisingly, the pubic hair almost com-
, O2 | @5 U/ p% k$ Hpletely disappeared except for a few vellous hairs at9 @' a; q- `& c7 C. v; c6 v
the base of the phallus. Testicular volume was still 2
2 z2 j3 M, R% q9 h& ^6 l/ A' w @mL, and the size of the penis remained unchanged.+ g2 s9 ~: [! h# i
The mother also said that the boy was no longer hav-
$ j/ V0 B: F: W+ ~- ~6 i; G) Ming frequent erections.
& ]9 U) H( \5 M% t5 bBoth parents were again questioned about use of7 Y: w) }" C0 z! o* \4 Z) M
any ointment/creams that they may have applied to
5 h+ y% ?' _5 ~! D, othe child’s skin. This time the father admitted the+ j& m. k; d$ S( H" @! h, `6 \
Topical Testosterone Exposure / Bhowmick et al 541
/ t2 z9 C+ u B: w, S+ Juse of testosterone gel twice daily that he was apply-
" {7 \/ Y* b/ ^1 O' W2 j2 R) u* Ding over his own shoulders, chest, and back area for. n: f6 K( G; X
a year. The father also revealed he was embarrassed% U6 w9 m# y J$ v% d8 s
to disclose that he was using a testosterone gel pre-7 [1 F) V/ S) s) G2 k" t
scribed by his family physician for decreased libido- l4 H: G; Q' a$ h- i$ B
secondary to depression.% E9 D0 W3 ^8 ?- f# M$ p
The child slept in the same bed with parents.' k; y( E* @1 ?: o
The father would hug the baby and hold him on his
9 Y$ ?% G0 i6 Z7 echest for a considerable period of time, causing sig-
/ W, F. q) g A _0 Enificant bare skin contact between baby and father.
: @& Q7 g* t6 H6 |The father also admitted that after the phone call,
s0 _: d' P& x9 V' y7 \8 ~* X% nwhen he learned the testosterone level in the baby
" r7 i3 E8 x( Bwas high, he then read the product information% D2 ^! @! y1 z$ O* e7 M
packet and concluded that it was most likely the rea-3 d: o! w; O3 S5 ~: b R% R& l% V6 L" r
son for the child’s virilization. At that time, they" S- c9 M1 s0 @1 E P" z
decided to put the baby in a separate bed, and the: a+ T' L" O* C
father was not hugging him with bare skin and had' w$ t! N! Q$ E; ]9 N4 T1 g
been using protective clothing. A repeat testosterone3 v4 W+ ?8 R# l" j+ \( W8 S! X
test was ordered, but the family did not go to the$ |1 {# j. y' h9 z- X8 B, m
laboratory to obtain the test.) V6 Z8 P4 y$ l# |# s& K+ S
Discussion( O+ }* F& o7 ^0 x
Precocious puberty in boys is defined as secondary* I5 V& _; [1 R0 t! S* Y, }2 G
sexual development before 9 years of age.1,4
3 S/ ~ A; A1 f- T) D7 _* \Precocious puberty is termed as central (true) when
; x" E4 M9 j% ?. f7 N9 mit is caused by the premature activation of hypo-
5 }) ^/ Q5 o8 `0 b& X, Tthalamic pituitary gonadal axis. CPP is more com-
; R8 _) x p% ^* cmon in girls than in boys.1,3 Most boys with CPP( j6 j$ X: q1 c: Z3 d I8 u
may have a central nervous system lesion that is- v6 A1 o3 L- y; U
responsible for the early activation of the hypothal-1 `/ W) r' R6 E
amic pituitary gonadal axis.1-3 Thus, greater empha-; h E, V& W6 Y
sis has been given to neuroradiologic imaging in' @6 S! Q. \- R. u6 o ^2 z0 w
boys with precocious puberty. In addition to viril-' f8 x; W; g8 i. n9 Y
ization, the clinical hallmark of CPP is the symmet-4 F1 G: T+ l$ ?% ^; J
rical testicular growth secondary to stimulation by
! z# r( k) q/ s3 l, j; Ugonadotropins.1,3$ T8 F* }, ^4 }. B3 b
Gonadotropin-independent peripheral preco-
7 B- x1 z9 y( H$ @' rcious puberty in boys also results from inappropriate
9 X, I" [) M' z4 P- _' K$ landrogenic stimulation from either endogenous or, p8 B N9 e! {' t3 k
exogenous sources, nonpituitary gonadotropin stim-
& w9 R3 o* ~. yulation, and rare activating mutations.3 Virilizing
% E3 [9 ^- K! c* m ^" d4 Qcongenital adrenal hyperplasia producing excessive$ D! X2 S! i4 L2 R! A3 F" ?- f; q
adrenal androgens is a common cause of precocious
+ Y* R" i% x# t, f. I. [9 E% `puberty in boys.3,4: ~9 z$ g. p# k+ G8 J
The most common form of congenital adrenal- T; W& d0 k5 a* s7 T
hyperplasia is the 21-hydroxylase enzyme deficiency.
. A5 I& j/ e5 iThe 11-β hydroxylase deficiency may also result in8 a1 X# j' k( e
excessive adrenal androgen production, and rarely,
@% Y/ a$ L, V9 tan adrenal tumor may also cause adrenal androgen+ X* E/ _5 F* c2 S9 D* U
excess.1,3
! w( }5 v; z0 B# s/ r$ S) lat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( m6 m2 x7 ]8 f6 \- }
542 Clinical Pediatrics / Vol. 46, No. 6, July 20075 ?1 q d I( e* R: P1 n( ?
A unique entity of male-limited gonadotropin-
0 j2 e4 J2 t7 J, Q1 _independent precocious puberty, which is also known
6 z) B' B) _$ W* Xas testotoxicosis, may cause precocious puberty at a
i7 J& q) U. ^" j* Fvery young age. The physical findings in these boys
! N+ U& M: ~# a: Qwith this disorder are full pubertal development,
) ~- L, X; k8 \8 K2 Q! b: O% M2 Kincluding bilateral testicular growth, similar to boys
) F1 N% y! L& F0 P* w/ f& U* E0 _; }/ I0 K% wwith CPP. The gonadotropin levels in this disorder1 H- G4 B6 q6 T' J% s) |4 _
are suppressed to prepubertal levels and do not show
6 G W m) E& ~& w7 \4 H u8 xpubertal response of gonadotropin after gonadotropin-
0 e9 f% A- T$ D* xreleasing hormone stimulation. This is a sex-linked
9 c6 E4 V% r, ^autosomal dominant disorder that affects only
4 F+ Q" [7 _' b+ ?+ M# Emales; therefore, other male members of the family" l9 h4 x5 r& A# V3 M7 D
may have similar precocious puberty.3
" x5 q% ?0 v9 z2 t7 O! v/ z2 ]+ vIn our patient, physical examination was incon-
6 |8 ?' |1 W$ u" f+ |sistent with true precocious puberty since his testi-1 w, y: j9 `( k. P
cles were prepubertal in size. However, testotoxicosis7 ~: A! p O9 ^; l8 K; I: o
was in the differential diagnosis because his father$ j" B% F; u/ O. \* |8 }7 w) D) G
started puberty somewhat early, and occasionally,
. h$ a% ~) o, w+ ntesticular enlargement is not that evident in the
9 _6 j* \" M* d5 E; ^$ b9 o/ Rbeginning of this process.1 In the absence of a neg-
# e: W. d' d9 z8 K4 wative initial history of androgen exposure, our# g3 u; c1 U$ {3 e
biggest concern was virilizing adrenal hyperplasia,0 l+ U) @6 e+ ?7 P+ P9 {3 v; o
either 21-hydroxylase deficiency or 11-β hydroxylase
9 ] }- ?6 s6 g) x9 I, xdeficiency. Those diagnoses were excluded by find-, V! P. |% i* N) t3 }
ing the normal level of adrenal steroids.9 j' I/ E& X# H% y: {
The diagnosis of exogenous androgens was strongly
5 C* z$ I% f/ }/ y' S5 R( ~8 s8 I" Dsuspected in a follow-up visit after 4 months because0 M; a2 L1 D/ U* w) { Z! l* w
the physical examination revealed the complete disap-
/ t. U5 A# s, [* j3 S9 opearance of pubic hair, normal growth velocity, and
$ r: ]/ J3 w; D v# V2 z* X4 @. r6 odecreased erections. The father admitted using a testos-
/ [, u/ E/ b8 o/ Uterone gel, which he concealed at first visit. He was5 T1 j7 I5 }6 m+ \8 _6 Q" Q
using it rather frequently, twice a day. The Physicians’$ K; {% w4 ^8 W7 R* a! L
Desk Reference, or package insert of this product, gel or
% [/ u8 g- m9 c; Bcream, cautions about dermal testosterone transfer to: q- O0 E5 _* s0 ?& W2 F/ K
unprotected females through direct skin exposure.
0 o! E# z8 H( i w) ASerum testosterone level was found to be 2 times the. J; H9 z+ y. d' \
baseline value in those females who were exposed to9 a ^% I/ U# Z' ^( I1 d
even 15 minutes of direct skin contact with their male
0 u! Y2 \3 k# j! @partners.6 However, when a shirt covered the applica-) z r0 f3 G0 ^2 U' \8 k
tion site, this testosterone transfer was prevented.: A. [( Z% |3 }+ W" u
Our patient’s testosterone level was 60 ng/mL,
6 G: W a- u; j4 _* iwhich was clearly high. Some studies suggest that
$ b- L; H* r, N& l- edermal conversion of testosterone to dihydrotestos-
$ n2 Q& p! Z* x- ?3 o) q. Kterone, which is a more potent metabolite, is more+ ^* [$ I3 S" c$ U2 B
active in young children exposed to testosterone
1 T# m: Z- F3 o0 r; e; y' W5 Aexogenously7; however, we did not measure a dihy-
& Q) f* W9 k; q& C6 L0 }drotestosterone level in our patient. In addition to
; H! H. P8 h* N& q' avirilization, exposure to exogenous testosterone in
6 B1 m, b* f2 r8 Gchildren results in an increase in growth velocity and) S/ u* Q7 e# L9 T2 `4 R I: ]8 d
advanced bone age, as seen in our patient.& a8 a& N }; O5 u8 f- ^1 q) m
The long-term effect of androgen exposure during0 o5 E- r3 ]1 V# A p. q8 \
early childhood on pubertal development and final; f" Z+ q1 J2 h( {0 g! o
adult height are not fully known and always remain( c" L1 n& N$ i5 z
a concern. Children treated with short-term testos-
q" ]1 Q8 H, a: J" ~% ~4 z( y$ Mterone injection or topical androgen may exhibit some2 ] x" {. D% e/ |* t- j; f( k9 k
acceleration of the skeletal maturation; however, after- L$ s7 ^: B* Z+ z0 B0 a2 I" j
cessation of treatment, the rate of bone maturation+ y3 g) R8 L4 R! V( f4 A! n) i
decelerates and gradually returns to normal.8,9
1 Q- k2 W- q% C4 I; @There are conflicting reports and controversy' Z, I. m/ L9 j; X) n: w
over the effect of early androgen exposure on adult
* j4 o P. w8 npenile length.10,11 Some reports suggest subnormal
) n- M) y1 ^* {8 z+ E4 |+ Tadult penile length, apparently because of downreg-$ k- h9 o. j3 ]7 x3 P' } D
ulation of androgen receptor number.10,12 However,) n/ m' N1 \6 a6 W) H; V
Sutherland et al13 did not find a correlation between" ^0 A' X$ N: ]5 P M9 |4 f
childhood testosterone exposure and reduced adult$ f9 o! g- z) W
penile length in clinical studies.
9 V( c# G" L( wNonetheless, we do not believe our patient is
5 W" q8 }) W$ g2 qgoing to experience any of the untoward effects from
; _, b. Q r e$ btestosterone exposure as mentioned earlier because% P3 }4 K& h& b2 T9 |: `0 m
the exposure was not for a prolonged period of time.( }/ h/ E. W' p
Although the bone age was advanced at the time of, z) }1 _2 V# y
diagnosis, the child had a normal growth velocity at
; @3 J6 g7 \. N& E- Dthe follow-up visit. It is hoped that his final adult8 I' h) e3 a! h6 T
height will not be affected.
2 m- x& H3 S1 b" |9 lAlthough rarely reported, the widespread avail-' a+ _- e, v" j# R
ability of androgen products in our society may, f: D, o( S, E5 D; @9 o3 I0 a
indeed cause more virilization in male or female, f9 v5 m9 k. w- O8 b2 E' n
children than one would realize. Exposure to andro-
- {& v }8 s2 k5 s) }gen products must be considered and specific ques-
/ J/ v1 A! z( ?0 _1 c* t) @' n9 [$ Ktioning about the use of a testosterone product or( S4 H* E) l" @' s/ X
gel should be asked of the family members during O5 m' Z" H3 l5 ]4 N( g
the evaluation of any children who present with vir-
5 I( G% Q8 [4 }" {. hilization or peripheral precocious puberty. The diag-
! t, p. i1 l; h. l8 nnosis can be established by just a few tests and by
" j, C: w) P& b, s( |6 \6 \! m) bappropriate history. The inability to obtain such a
& T( u. p! d2 n1 ~6 Vhistory, or failure to ask the specific questions, may& u3 Z) g9 k' j' b: d; u& J
result in extensive, unnecessary, and expensive m/ }6 y8 B( L; |; x. h8 W
investigation. The primary care physician should be
2 C/ y% b8 b, U+ ]- m3 |aware of this fact, because most of these children$ Q, W2 V) e; B+ h4 a$ j* _
may initially present in their practice. The Physicians’
! k$ f6 k. t! V0 pDesk Reference and package insert should also put a0 U! H6 ?. P" `4 W
warning about the virilizing effect on a male or5 @1 l! ~9 f# l e% x# i. G
female child who might come in contact with some-4 A" u& s6 c5 _# D; [
one using any of these products.
8 a3 N8 f9 |# y" @( gReferences% f1 N" k) J% I) b( t& P
1. Styne DM. The testes: disorder of sexual differentiation9 |2 i, w9 a: v( z5 a
and puberty in the male. In: Sperling MA, ed. Pediatric
: ]; }; e! V' z5 C4 v+ {( d) uEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;9 \" P* N2 ^- Q$ Q9 \- {
2002: 565-628.% f+ a4 S# H; X, `7 S8 N
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious) R! X1 {8 y( Q1 K
puberty in children with tumours of the suprasellar pineal
4 t, T% A8 j" T. b4 ?at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. T. ^) A/ K; n V- _
Topical Testosterone Exposure / Bhowmick et al 543
; o" w4 E8 @* f! U. \& iareas: organic central precocious puberty. Acta Paediatr.! L: u" t; {, D/ n
2001;90:751-756.
1 w+ t. Q" |# J l* d3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed." P8 u9 y3 K6 Z! Q% Q1 z
Pediatric Endocrinology. 4th ed. New York, NY: Marcel$ R9 J# R% ]6 J' c
Dekker Inc; 2003:211-238.
: C+ |' }* o" Y K$ [# p% n4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual2 Q# s U! x, m9 l# j1 H ?. ?
development in a two-year-old boy induced by topical
* [! |( k$ E& } X$ e6 eexposure to testosterone. Pediatrics. 1999;104:e23.
: U/ u% q* l- f- o& b$ y5. Greulich WW, Pyle SI, eds. Radiographic Atlas of2 V, I4 f/ t: L7 Z( X
Skeletal Development of the Hand and Wrist. 2nd ed.. o- p& }. y1 j! k/ l
Stanford, CA: Stanford University Press; 1959." s) P- O: y, R
6. Physicians’ Desk Reference. Androgel 1% testosterone,2 b3 ?6 E( F: [( m
Unimed Pharmaceutical Inc. Montvale, NJ: Medical/ Q5 I; K3 o1 `
Economics Company, Inc; 2004:3239-3241.
* j& O. m: I: y: ^4 @, h- W! K7. Klugo RC, Cerny JC. Response of micropenis to topical
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