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is a significant concern for physicians. Central' a& _4 q( X; b6 o
precocious puberty (CPP), which is mediated, M; O. O7 \' o% t+ n; d P. h% _
through the hypothalamic pituitary gonadal axis, has3 s! Q* u/ h" z6 z
a higher incidence of organic central nervous system
# T! z) F+ s' F ?9 ?! |0 alesions in boys.1,2 Virilization in boys, as manifested' |; i' b% ?6 _# G5 ?& s( Z. @
by enlargement of the penis, development of pubic
; V8 @/ c- G) d- J& j! Ahair, and facial acne without enlargement of testi-" `% P8 E( ]* \4 Y, Q9 ]
cles, suggests peripheral or pseudopuberty.1-3 We+ X* n+ W3 C- k( j$ e* V( o; |$ q
report a 16-month-old boy who presented with the) i8 R' o9 g2 k) g% E$ ~8 [8 v
enlargement of the phallus and pubic hair develop-5 \9 J$ K# ]* B1 {5 M
ment without testicular enlargement, which was due
" }6 R5 m4 |: c0 i! uto the unintentional exposure to androgen gel used by6 t' C7 d8 G4 c1 x( @
the father. The family initially concealed this infor-5 ?6 T) j- Y( E4 ]3 m& u( w
mation, resulting in an extensive work-up for this: u% d3 i6 R6 y- q
child. Given the widespread and easy availability of: s( A! i, g* W0 o/ ]' X
testosterone gel and cream, we believe this is proba-
8 N: m( G( }, u! E2 R+ E5 |5 H# sbly more common than the rare case report in the8 n8 X) n& B$ w$ a3 d/ E
literature.46 d* p+ Y$ F( ~% O$ w. }# K
Patient Report
1 d( l$ t' T% q. t' J. ^: JA 16-month-old white child was referred to the9 t0 ]2 X3 @) Z ^( e
endocrine clinic by his pediatrician with the concern
4 X0 K6 n/ \0 n7 @8 {of early sexual development. His mother noticed
3 k9 d8 {) m% blight colored pubic hair development when he was- k a( {/ k6 H4 b' @
From the 1Division of Pediatric Endocrinology, 2University of4 w! v' U- S! w
South Alabama Medical Center, Mobile, Alabama.
' p4 l# q* {; p2 Q3 a5 j- ~( b JAddress correspondence to: Samar K. Bhowmick, MD, FACE,: F! s# {# [: ?7 k0 @
Professor of Pediatrics, University of South Alabama, College of
" E+ D9 W2 T6 T0 V% pMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;' L' n0 l- ?0 f* ^
e-mail: [email protected].
+ |, \' A/ P o b$ x8 }3 `. r( \about 6 to 7 months old, which progressively became; d2 S3 r1 `. ]7 `& N4 D! _+ X! b6 U
darker. She was also concerned about the enlarge-
# |$ {% u0 ]5 T" }$ f+ H4 dment of his penis and frequent erections. The child! L; p9 Q6 M2 l: _: m& T8 D+ W
was the product of a full-term normal delivery, with
- Q. B1 n# E# s8 q3 A: ea birth weight of 7 lb 14 oz, and birth length of6 e: c, c! `3 Y" I& g! j
20 inches. He was breast-fed throughout the first year- C- O z7 ]6 N2 n
of life and was still receiving breast milk along with
' q; Y( S% ~1 qsolid food. He had no hospitalizations or surgery,$ G0 t, d& x( p5 S
and his psychosocial and psychomotor development9 X5 N4 i3 w! C" {3 N/ i( B/ R
was age appropriate.$ m8 @5 L1 S5 v5 K2 X% Z- l
The family history was remarkable for the father,
) U; t0 h$ d2 D3 L0 Dwho was diagnosed with hypothyroidism at age 16,- q: _$ j6 }& _& Q( k* x( q
which was treated with thyroxine. The father’s# `6 s. Q) t) }% @" v
height was 6 feet, and he went through a somewhat( ~( H' v/ M& N3 Y1 b3 V" R) {
early puberty and had stopped growing by age 14.
4 e) f' D6 |! ~2 z) l" fThe father denied taking any other medication. The% s' q0 d7 A3 J S9 A
child’s mother was in good health. Her menarche
& q. o, W! P5 v& N9 ywas at 11 years of age, and her height was at 5 feet
0 g( \4 C( A7 g: N" [ D5 inches. There was no other family history of pre-
" G) F4 _. a4 L6 Fcocious sexual development in the first-degree rela-
3 B$ {! r8 V" A" {9 G9 W) ctives. There were no siblings.
1 D5 `. `4 z2 g4 ^9 R; k+ WPhysical Examination
: {6 [7 W2 G# rThe physical examination revealed a very active,: r+ x4 b$ s, ?( `
playful, and healthy boy. The vital signs documented E1 E$ S @- q# n5 L: [0 y; U
a blood pressure of 85/50 mm Hg, his length was
+ p0 e9 Y; c1 r( p* I5 h2 K90 cm (>97th percentile), and his weight was 14.4 kg. e. w' s& k! r2 P& L7 K
(also >97th percentile). The observed yearly growth
. u6 M7 H( W y- k# H* i5 Lvelocity was 30 cm (12 inches). The examination of) O1 _2 l6 E1 f9 G; ^! `+ ^
the neck revealed no thyroid enlargement.% V- B7 O7 w; m
The genitourinary examination was remarkable for) [! Y" \" \4 f. k
enlargement of the penis, with a stretched length of
, o2 f8 D3 W- v) C6 Z8 cm and a width of 2 cm. The glans penis was very well
7 ]; l7 x/ y6 _1 ?& Bdeveloped. The pubic hair was Tanner II, mostly around
% H" ~' S4 B, k540
' F! F' Y: E u# V: p2 \, k, pat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from# j0 n/ Z/ m, Z( T z7 q4 J0 A
the base of the phallus and was dark and curled. The
. B8 L9 ^* P- e2 `5 Etesticular volume was prepubertal at 2 mL each.& F- C8 k! F* O- |5 ?/ ? A* a; v0 W
The skin was moist and smooth and somewhat
8 m! _: L$ L2 P2 P/ W. r) ^! |oily. No axillary hair was noted. There were no
# j' h9 ~$ x6 S9 {abnormal skin pigmentations or café-au-lait spots.
3 f, B; _5 f6 S; mNeurologic evaluation showed deep tendon reflex 2+1 I9 J6 L. @2 d
bilateral and symmetrical. There was no suggestion
+ B" z+ E; }' u1 ]4 u* cof papilledema.
. M, \( X" @( ALaboratory Evaluation
$ Z4 U/ B5 I7 A& r4 GThe bone age was consistent with 28 months by3 N2 b3 @+ M# U, x2 s2 X
using the standard of Greulich and Pyle at a chrono-4 i' V1 M+ ?* y; P3 C& c
logic age of 16 months (advanced).5 Chromosomal" [8 l& |. F2 w/ E, \8 w( }
karyotype was 46XY. The thyroid function test0 o1 Q: n2 u+ y
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
7 q5 S6 g; X v* Ylating hormone level was 1.3 µIU/mL (both normal).' `6 Z4 E' t0 L9 s \
The concentrations of serum electrolytes, blood
4 w. _+ m; M4 w6 Purea nitrogen, creatinine, and calcium all were' [, B) ]- v% ]" W
within normal range for his age. The concentration! d5 n8 c- ?; X* \( O( R
of serum 17-hydroxyprogesterone was 16 ng/dL$ `5 B% j, n+ v) @8 T
(normal, 3 to 90 ng/dL), androstenedione was 20. V' E6 k+ Z! S6 T H* |
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
' {( Q( ]4 }# G& _# Pterone was 38 ng/dL (normal, 50 to 760 ng/dL),
" D. [+ O4 j$ ^, J5 E1 s# Pdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
2 B6 |: ]% a( |. Q, L49ng/dL), 11-desoxycortisol (specific compound S)1 k, \; H$ ?5 E/ a3 y
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
1 M# R. M# |1 J6 Z# T) ]. _+ `tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total3 x0 f" W0 X# D0 C
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),, ~0 G/ o* z* f
and β-human chorionic gonadotropin was less than
% s$ b q3 `. N* h6 O5 mIU/mL (normal <5 mIU/mL). Serum follicular6 P( m- F# v- i/ T! g, d3 \0 |3 D" w
stimulating hormone and leuteinizing hormone; ]+ ]; C/ E7 i" I \+ v
concentrations were less than 0.05 mIU/mL3 `" s% j' p! F* D9 ~
(prepubertal). s8 W" O s& N' R# M4 g
The parents were notified about the laboratory
& K- O. m) \0 @5 | vresults and were informed that all of the tests were
; N' s4 \& ?/ N6 I. p9 i9 @% vnormal except the testosterone level was high. The, |0 i% M) A# ^. G
follow-up visit was arranged within a few weeks to
2 |, P0 R- B3 t7 D. ? k# G2 @obtain testicular and abdominal sonograms; how-' v6 d& z: ^7 i* \3 Y
ever, the family did not return for 4 months.' a1 R4 J5 N5 e* X0 Z2 e
Physical examination at this time revealed that the
' v O7 e" u: H8 {child had grown 2.5 cm in 4 months and had gained1 Z$ a8 Q" H9 ] n5 [: s
2 kg of weight. Physical examination remained( k% X z t ^1 a3 X
unchanged. Surprisingly, the pubic hair almost com-' Z$ B3 W( R$ s9 [3 i
pletely disappeared except for a few vellous hairs at4 l( x: I$ ?# t( ]6 {
the base of the phallus. Testicular volume was still 2: ~8 e& y7 i7 `2 O% N
mL, and the size of the penis remained unchanged.
1 k! v7 \+ \% S5 ^2 a" q( jThe mother also said that the boy was no longer hav-
8 k1 u+ J9 K% [$ ]- ring frequent erections./ z; @8 @0 P) J6 o3 W
Both parents were again questioned about use of" c- a5 ^9 n, @* ]
any ointment/creams that they may have applied to
2 o/ H# {$ A6 E0 Lthe child’s skin. This time the father admitted the
4 m7 Y( j6 N; pTopical Testosterone Exposure / Bhowmick et al 541. ?7 Z7 V3 _+ u$ W, b& Q) \9 F
use of testosterone gel twice daily that he was apply-
. w7 P p$ N" V" I' Ning over his own shoulders, chest, and back area for
/ [( ^$ z) k: i: F& F- T5 Z. E1 [a year. The father also revealed he was embarrassed
- l5 p1 Q4 l$ ^! {3 ?to disclose that he was using a testosterone gel pre-2 ]# k' g2 t- D& K: H; l
scribed by his family physician for decreased libido5 E- ~0 Z( \# Y, n
secondary to depression.
% Y+ c# c5 I0 K4 HThe child slept in the same bed with parents.
, d& r# I0 b+ C7 s4 \The father would hug the baby and hold him on his% {, ?5 g# l/ a+ K
chest for a considerable period of time, causing sig-
3 K, k" D2 i9 Z4 ~! lnificant bare skin contact between baby and father.
' n# q( C0 ^! h/ K% }% k9 e; WThe father also admitted that after the phone call,4 ?/ s. C$ s n4 O! J& Y
when he learned the testosterone level in the baby
8 w4 G0 {( M5 U) x& ^was high, he then read the product information$ U3 A" c2 x9 r8 @ R$ V6 [
packet and concluded that it was most likely the rea-
* D" R: ?6 q( R: O+ B7 x# Ison for the child’s virilization. At that time, they
+ E& p* a+ u% Idecided to put the baby in a separate bed, and the) k! I# W# y% g% D$ b, J+ U
father was not hugging him with bare skin and had8 z& M0 c Y, b9 B, w' ~/ a
been using protective clothing. A repeat testosterone
- L* k; Y& t. @. }3 {test was ordered, but the family did not go to the; u* [% b: t$ u$ M, ?+ c- I
laboratory to obtain the test.- {% [( R1 D$ w
Discussion
! r( x( N. g6 e3 }' p# G; |* CPrecocious puberty in boys is defined as secondary& w4 w9 c) E& V6 q' F
sexual development before 9 years of age.1,4
4 I1 o& s, q! h8 h8 [9 JPrecocious puberty is termed as central (true) when
# R$ y" ~2 B, x" y7 uit is caused by the premature activation of hypo-( O6 `7 t+ g# Z8 C0 l! M+ J+ |% `
thalamic pituitary gonadal axis. CPP is more com-
* E- F/ o2 J5 }% o% h% ?mon in girls than in boys.1,3 Most boys with CPP
" u9 ~8 R8 X; X* X: q* r9 [: rmay have a central nervous system lesion that is: E. S+ y: U* j! V& s2 d
responsible for the early activation of the hypothal-+ i/ z) z# {$ J$ _3 k, R
amic pituitary gonadal axis.1-3 Thus, greater empha-
}$ v; h9 u$ q$ z+ }# D6 m" Zsis has been given to neuroradiologic imaging in w+ E' u4 s" U9 i
boys with precocious puberty. In addition to viril-
9 K! q6 \, [1 m, Q! h- \ization, the clinical hallmark of CPP is the symmet-9 Y- K5 E" p; J* i* f; w9 ]- {* h9 O
rical testicular growth secondary to stimulation by. p; }7 D0 K! T) Q6 V
gonadotropins.1,3
0 @9 N( C4 j/ \5 i J, ]3 y0 wGonadotropin-independent peripheral preco-
( `3 D+ M2 S% k, Ecious puberty in boys also results from inappropriate
3 P, G8 a! I8 c) v! `5 F9 b- nandrogenic stimulation from either endogenous or' K# \* `4 W! q! j0 h: S
exogenous sources, nonpituitary gonadotropin stim-
, Y$ [9 i* b- F- u3 T- \5 vulation, and rare activating mutations.3 Virilizing1 S, ^8 B2 ?9 N, h1 c9 p# \
congenital adrenal hyperplasia producing excessive
7 P+ x1 j: n. s7 Tadrenal androgens is a common cause of precocious3 k6 n1 q5 B9 X9 o7 a
puberty in boys.3,44 a2 z: |% M3 b: i8 d: V& B3 K
The most common form of congenital adrenal4 x0 g D8 g/ ]$ t2 ]" ?8 S e7 b
hyperplasia is the 21-hydroxylase enzyme deficiency.- s4 s' M" v! E! B
The 11-β hydroxylase deficiency may also result in
' g2 @2 w' E! F8 Kexcessive adrenal androgen production, and rarely,
! p% p% {3 C+ d2 Q9 ?+ zan adrenal tumor may also cause adrenal androgen
+ |0 w0 x+ N/ A) Y [0 Bexcess.1,3
( A% D2 h( ~( I, V9 }& uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
; `- _: [: U1 ?542 Clinical Pediatrics / Vol. 46, No. 6, July 2007% c4 ` p( X" O8 P& U! N7 y
A unique entity of male-limited gonadotropin-
) _% s8 E$ R2 s& p& Vindependent precocious puberty, which is also known
- ^6 d5 _- k _( J/ Ras testotoxicosis, may cause precocious puberty at a
5 c" K3 {. X( F) [' J3 E i1 ?. X# Kvery young age. The physical findings in these boys) }6 w- l9 O0 h9 m$ N
with this disorder are full pubertal development,
6 V: N9 s! u+ k3 h6 u- _* l; jincluding bilateral testicular growth, similar to boys! R( q& ^' M/ D% m, z* v7 c5 V
with CPP. The gonadotropin levels in this disorder
. Q9 ~+ I5 t2 A0 J) L3 G% a3 ?" care suppressed to prepubertal levels and do not show
- J% ^( j% K6 H" Bpubertal response of gonadotropin after gonadotropin-+ s. K4 q, q9 \0 F
releasing hormone stimulation. This is a sex-linked- X# c% c2 _! ^" n$ a
autosomal dominant disorder that affects only
9 F# b0 x8 E2 Bmales; therefore, other male members of the family
( |& b0 d: V9 t6 ?- c4 j# omay have similar precocious puberty.3! F( H* G9 p2 ~3 v! ?- s
In our patient, physical examination was incon-9 [& M- k1 Z! g- m+ W
sistent with true precocious puberty since his testi-
6 j( L0 ~2 d( l# N$ _3 Xcles were prepubertal in size. However, testotoxicosis
. [. n- C6 C( Pwas in the differential diagnosis because his father
: N+ b" b( {: ]started puberty somewhat early, and occasionally,- T3 v2 {, }8 j; X
testicular enlargement is not that evident in the u- C# y8 I( Y% ?
beginning of this process.1 In the absence of a neg-8 Y! m, ?) U3 ^! Y
ative initial history of androgen exposure, our6 Y; v9 l* ?5 t
biggest concern was virilizing adrenal hyperplasia,) K" m5 c9 P/ _4 ~5 R+ V
either 21-hydroxylase deficiency or 11-β hydroxylase
& `- e# f% g0 x/ P, ~deficiency. Those diagnoses were excluded by find-
7 | ^3 g1 [2 x, r( aing the normal level of adrenal steroids.) ^& @+ |% i" P& G
The diagnosis of exogenous androgens was strongly
; K3 z. H4 y0 }# g: g Y+ Tsuspected in a follow-up visit after 4 months because
* S- O2 M, o, |- L1 m" a* Athe physical examination revealed the complete disap-: b( Y2 D- m! p7 K# H6 k+ l& c
pearance of pubic hair, normal growth velocity, and4 w4 r! O" h: b" R
decreased erections. The father admitted using a testos-& Z$ n) P: F; D0 e2 }( Y- a
terone gel, which he concealed at first visit. He was
% R6 M# s- g: i/ l5 V2 S4 i. Cusing it rather frequently, twice a day. The Physicians’
! _$ x% H/ _" xDesk Reference, or package insert of this product, gel or+ Q) L7 u1 O: F" Y& B- F9 B+ {8 O
cream, cautions about dermal testosterone transfer to) o! Z4 B1 a* @; j7 h6 j9 s" h0 k
unprotected females through direct skin exposure.! O: y% _- E, _( V- \# _; ]" T/ w9 M
Serum testosterone level was found to be 2 times the
! c3 X& D' k B* [4 Xbaseline value in those females who were exposed to
K6 x& G# @7 A ~. ?/ Ceven 15 minutes of direct skin contact with their male, u3 @: F6 v# a5 s/ @1 [3 }) G: B
partners.6 However, when a shirt covered the applica-
1 I) Q; k. Y9 V9 m/ i. Z* Ction site, this testosterone transfer was prevented.
. l6 N2 @' v e) }* t0 OOur patient’s testosterone level was 60 ng/mL,
+ a: Z1 e' y3 B3 t! U9 Y P& t) fwhich was clearly high. Some studies suggest that
3 K; p3 m" s* a7 D+ ^* J* cdermal conversion of testosterone to dihydrotestos-5 g; |4 [ J# k, P
terone, which is a more potent metabolite, is more
$ T+ I+ O5 W# b9 H6 q' F6 Iactive in young children exposed to testosterone4 L1 o. n8 X$ i
exogenously7; however, we did not measure a dihy-
9 j$ r0 }2 A0 |( g0 c& m+ ydrotestosterone level in our patient. In addition to, m- ?5 r0 ?8 S4 r5 U
virilization, exposure to exogenous testosterone in* V9 d# y. z7 j4 Z' ]' v. S
children results in an increase in growth velocity and
2 ?1 _& P! e% x5 W$ jadvanced bone age, as seen in our patient.
+ z. F8 j; k3 E) w# Z( r% FThe long-term effect of androgen exposure during
F4 [- ?, W& v* B% h8 c. Searly childhood on pubertal development and final" _* ]; M" @7 t) l
adult height are not fully known and always remain" _: h" q9 m# U
a concern. Children treated with short-term testos-
) |* z3 W: W/ I; B- m2 w/ `- v2 L' eterone injection or topical androgen may exhibit some0 r; r) B4 ^: u) f
acceleration of the skeletal maturation; however, after
) o$ ~! u. S$ qcessation of treatment, the rate of bone maturation; J; B5 o9 j; y5 j% p* f
decelerates and gradually returns to normal.8,92 w R! b) ?* q
There are conflicting reports and controversy3 s+ p6 @- Y3 K) z/ V- } o! L
over the effect of early androgen exposure on adult5 I2 V) Q" P; ^9 s6 S8 O
penile length.10,11 Some reports suggest subnormal" I5 |" b& b0 _5 G
adult penile length, apparently because of downreg-! H0 c7 A/ R7 |
ulation of androgen receptor number.10,12 However,
" q- G6 D- d7 f. i l& iSutherland et al13 did not find a correlation between
7 s7 |+ \0 _ L3 S1 \3 Jchildhood testosterone exposure and reduced adult, J6 V M- f& s7 v4 a
penile length in clinical studies.! V4 C+ q" Y: n& C
Nonetheless, we do not believe our patient is
7 W4 `# {8 f% X# l* D9 pgoing to experience any of the untoward effects from5 ^; o% P6 E* R" h
testosterone exposure as mentioned earlier because: G: r; W, v% d1 k% t; a2 f, S
the exposure was not for a prolonged period of time.
, J3 y- Z. Y* pAlthough the bone age was advanced at the time of, d8 _7 q! `- K* w( }1 r' d
diagnosis, the child had a normal growth velocity at
3 e" q- ]- E* ~8 G) ]' {5 cthe follow-up visit. It is hoped that his final adult/ E$ m# o1 J; w1 K: b- s
height will not be affected.
# i; A1 } @* Q& l" R5 `3 UAlthough rarely reported, the widespread avail-
8 l, _3 V0 \2 H/ G W7 [ability of androgen products in our society may
: r$ B6 e; O6 m& K/ t# p7 T3 ~/ jindeed cause more virilization in male or female# a! w! `: c0 u7 ^3 j# n
children than one would realize. Exposure to andro-' k4 s/ d8 |+ @7 u6 ] l7 c* A; H
gen products must be considered and specific ques-
, U2 S9 X7 l9 v* ftioning about the use of a testosterone product or
" b2 G4 E7 C! sgel should be asked of the family members during: V9 \( `- H* G* k; K
the evaluation of any children who present with vir-( z$ R4 L$ v! {' k
ilization or peripheral precocious puberty. The diag-
5 ~% Y( j3 z/ y+ G( {: R" T2 ?nosis can be established by just a few tests and by
$ k- q% G- [6 U, q _appropriate history. The inability to obtain such a5 u% Z2 L/ @# Z$ i3 _8 _# X
history, or failure to ask the specific questions, may
, F5 {3 f# t& ^! f. I( vresult in extensive, unnecessary, and expensive
( D# _' l- g$ k3 Y% p5 Y4 |investigation. The primary care physician should be
0 H7 E, x# C( p# c8 l, b6 t) Maware of this fact, because most of these children0 \) |) _2 e7 y- V2 P }, _4 c
may initially present in their practice. The Physicians’, m6 u+ I8 v6 i- }
Desk Reference and package insert should also put a/ z( I) w$ \$ Z; L4 R
warning about the virilizing effect on a male or
: O, d* Y. e# ]3 ^+ T1 Jfemale child who might come in contact with some-( {4 |% f2 r2 v+ B' p
one using any of these products.
4 \( v+ ?6 X6 ^References
( {9 S# |/ ]: |: |3 P3 ?1. Styne DM. The testes: disorder of sexual differentiation
3 e/ ?; W/ {6 T1 t0 Band puberty in the male. In: Sperling MA, ed. Pediatric
% S7 o# O/ D8 M8 _9 lEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
* j9 ]% q9 q$ z) p3 g$ n- ~5 j2002: 565-628.
; x4 [- \8 N' H% i0 x8 D' z( N' O2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious! `8 u2 q n3 H& W3 p. t
puberty in children with tumours of the suprasellar pineal
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2001;90:751-756.
3 ?+ f! x( J+ H- {3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
! @* q, y9 c+ O; [7 w$ i8 wPediatric Endocrinology. 4th ed. New York, NY: Marcel0 `* w* U. o. B+ F) g) W* ?; L+ f
Dekker Inc; 2003:211-238.
) a. P$ U7 x7 j4 A0 p! n4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual4 d) z$ C9 O' N) t
development in a two-year-old boy induced by topical
0 Q, H4 D9 W5 c9 Z7 m: t7 q1 @exposure to testosterone. Pediatrics. 1999;104:e23.7 L8 N; q2 o0 q) q8 n2 N: e! U2 F, M
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of; _; M1 B' K' f6 u
Skeletal Development of the Hand and Wrist. 2nd ed.
+ Z( e" G+ T, j3 E5 ?Stanford, CA: Stanford University Press; 1959.$ g- s+ I! V# Q* d* U) }
6. Physicians’ Desk Reference. Androgel 1% testosterone,9 v! [" a1 \- ~: @% Z1 u
Unimed Pharmaceutical Inc. Montvale, NJ: Medical, n% T, j; _% j7 v! h/ \
Economics Company, Inc; 2004:3239-3241.
! d3 T X6 m, X' e4 v, M7. Klugo RC, Cerny JC. Response of micropenis to topical5 r+ d6 R& T k/ v& [- K7 u
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