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is a significant concern for physicians. Central7 W1 i# ]" g% C7 X* q
precocious puberty (CPP), which is mediated- T+ }+ N' r' U4 k# @
through the hypothalamic pituitary gonadal axis, has- J/ _1 S+ [8 C) X5 k3 r- V/ h
a higher incidence of organic central nervous system
2 T1 Z _; t# J0 tlesions in boys.1,2 Virilization in boys, as manifested
5 {4 {* y! o: R3 M2 O( Qby enlargement of the penis, development of pubic* e4 `6 k- S7 n# d
hair, and facial acne without enlargement of testi-4 t+ u5 n. c5 q, Z2 H$ s$ L' Q9 M5 \
cles, suggests peripheral or pseudopuberty.1-3 We
) y1 B" E2 V0 X% T* Y K( Qreport a 16-month-old boy who presented with the
2 a' ~3 h1 a+ ^. \ o) J# lenlargement of the phallus and pubic hair develop-
2 M1 ~9 A' E* U! i+ Z. j5 nment without testicular enlargement, which was due
, f9 p8 f& [( _( P* K$ nto the unintentional exposure to androgen gel used by" D* M9 Y' {1 g, L1 p
the father. The family initially concealed this infor-4 {% a6 h4 l y* U9 E) I \
mation, resulting in an extensive work-up for this
, N8 h$ D: Q- V8 R* M' achild. Given the widespread and easy availability of
( e' k: V% T Ztestosterone gel and cream, we believe this is proba-, p+ l: N3 K; j6 {. k' H( ^
bly more common than the rare case report in the
7 _4 c- ~% A' Rliterature.46 ~% O/ g1 i- p5 _; v6 F
Patient Report6 a# `) O, Z; D$ C) t
A 16-month-old white child was referred to the
, ^9 q; ^8 ]0 ]( Z6 _4 \( O4 ?endocrine clinic by his pediatrician with the concern5 o# c& C( A. j& e- A- {
of early sexual development. His mother noticed
& q- \ w1 V% s3 `" x& Y0 ?; r# \light colored pubic hair development when he was5 D& C, b9 Q) z* Q
From the 1Division of Pediatric Endocrinology, 2University of
2 ~5 w7 B6 f4 M% ~. Y0 P3 mSouth Alabama Medical Center, Mobile, Alabama.
# i2 ?6 `+ ~8 HAddress correspondence to: Samar K. Bhowmick, MD, FACE,
3 ] j8 T7 K8 w' |& a! E1 oProfessor of Pediatrics, University of South Alabama, College of
, m$ d# s$ }& R9 B" m$ }( I5 RMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;: d$ z% P4 V" n, O% `: W
e-mail: [email protected].( E3 f4 C) _+ O
about 6 to 7 months old, which progressively became# T; i8 p. G8 e7 J8 n: |
darker. She was also concerned about the enlarge-$ v% ]" r5 k! ?$ F
ment of his penis and frequent erections. The child% O3 T7 o! [) u5 H& y2 K
was the product of a full-term normal delivery, with
; @2 a9 h" N7 H: @- ha birth weight of 7 lb 14 oz, and birth length of, n9 W0 }* O. Q% m/ C/ f
20 inches. He was breast-fed throughout the first year1 {: G/ o: k% B) T- L9 `/ |
of life and was still receiving breast milk along with% }$ E' E5 Z5 q
solid food. He had no hospitalizations or surgery,( ?" v0 G% b; Q0 O$ h! \
and his psychosocial and psychomotor development: v! U9 m' Y* u& K+ n
was age appropriate.
5 S+ Y7 Q# k' A. n+ G, lThe family history was remarkable for the father,4 G! F' | k2 f+ ^) a% h; e* D- ^) R
who was diagnosed with hypothyroidism at age 16,2 k; M. s' L$ D0 u( b: s0 y
which was treated with thyroxine. The father’s& O/ T% N* m T
height was 6 feet, and he went through a somewhat5 N |) v, _0 g& X5 i, @& R
early puberty and had stopped growing by age 14.! ]6 S3 R( g5 Y+ q
The father denied taking any other medication. The
% C5 J4 G" f: e% z, Xchild’s mother was in good health. Her menarche3 q" W3 C+ {9 c7 ^8 w
was at 11 years of age, and her height was at 5 feet
* M" f9 W; e# l& ?$ w Q' j5 Z5 inches. There was no other family history of pre-# D( @& [; ^* B i0 Z& w6 e
cocious sexual development in the first-degree rela-! S) g4 m8 M. T7 ^
tives. There were no siblings.
$ v; y8 r" b+ R# zPhysical Examination& v- b* e2 {( q9 N7 d
The physical examination revealed a very active,- a/ E2 j+ e- {+ U
playful, and healthy boy. The vital signs documented
, f) M/ n2 A4 h7 S2 ~0 Ta blood pressure of 85/50 mm Hg, his length was
& e- s8 Z* u( W9 V* d' u90 cm (>97th percentile), and his weight was 14.4 kg
& M1 ? H' r t$ A2 B9 f! y(also >97th percentile). The observed yearly growth
- r7 h1 _" g I+ Qvelocity was 30 cm (12 inches). The examination of4 ^" k( z9 D6 x# L
the neck revealed no thyroid enlargement.
3 }6 U) k+ C9 p# n A, MThe genitourinary examination was remarkable for! I+ J- ]& s: U
enlargement of the penis, with a stretched length of
/ R1 z& Q- x# S: L* h8 F8 cm and a width of 2 cm. The glans penis was very well: D( j+ t1 o& O/ \ d
developed. The pubic hair was Tanner II, mostly around
. k' `7 b3 x! X4 M% u% |' g540& R: P4 ?, z7 e; t2 ?9 f* O" r+ ?
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from; S+ E; U; d& K7 y0 V
the base of the phallus and was dark and curled. The9 ?. a# x+ R& g C* h5 }8 M
testicular volume was prepubertal at 2 mL each.
5 P0 u8 ]. Q4 S; ]% H3 KThe skin was moist and smooth and somewhat
! |6 j2 Q0 X* W; Q) f h8 w) ?oily. No axillary hair was noted. There were no
% M, C/ z% R6 f0 |abnormal skin pigmentations or café-au-lait spots.
2 `3 J0 O# C8 PNeurologic evaluation showed deep tendon reflex 2+; l* M/ E% N3 f; |, m5 A+ f
bilateral and symmetrical. There was no suggestion
) e' _! \; Y- N5 Z ^of papilledema.; L1 I- N# P* i
Laboratory Evaluation
& e- Y8 f ?- V4 k$ M4 XThe bone age was consistent with 28 months by3 c J2 K, q) X
using the standard of Greulich and Pyle at a chrono-
) Y0 \3 n% A! o* h j1 a, {: ?logic age of 16 months (advanced).5 Chromosomal; r3 v2 l! Z6 E2 e ~5 ^
karyotype was 46XY. The thyroid function test
. ] _# Z- b8 Z% ]9 \showed a free T4 of 1.69 ng/dL, and thyroid stimu-6 C( Z6 [7 m) n2 V9 W
lating hormone level was 1.3 µIU/mL (both normal).
. i0 d2 O2 r6 ~The concentrations of serum electrolytes, blood# Q! B: t3 D3 i& a* M1 S
urea nitrogen, creatinine, and calcium all were9 ~0 R# j, ^3 ^9 u
within normal range for his age. The concentration
; M; d, j% H6 s1 Fof serum 17-hydroxyprogesterone was 16 ng/dL
9 H/ G. u: K. A+ h$ D+ M(normal, 3 to 90 ng/dL), androstenedione was 20
) s3 t1 j4 q9 X2 d o: Gng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& H, d/ [4 x* U' Sterone was 38 ng/dL (normal, 50 to 760 ng/dL),
5 S+ Q; j9 i; s1 W( {desoxycorticosterone was 4.3 ng/dL (normal, 7 to
' n9 `2 U) z3 l( t& Y/ ?49ng/dL), 11-desoxycortisol (specific compound S)& |$ C" m0 d+ c/ z
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-! N9 S0 I9 w5 k( A' X' Z& N( {
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
& a8 ^9 _: W1 |- Jtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
3 V! ^& |1 h- T, M" Tand β-human chorionic gonadotropin was less than
! D, o) t/ o% l5 mIU/mL (normal <5 mIU/mL). Serum follicular$ P: t7 |$ @1 @% \% Y0 \; ?1 r; X
stimulating hormone and leuteinizing hormone
" _3 k& K( d- Kconcentrations were less than 0.05 mIU/mL$ _8 k2 d: ~' B& B$ \# B
(prepubertal).
: J, b: G2 u: ]+ Y, `& N {The parents were notified about the laboratory
! F( D+ n) e2 {results and were informed that all of the tests were: k, i* |9 M- h; o* F d$ r3 O
normal except the testosterone level was high. The
/ a% b" x E) a, t/ @! yfollow-up visit was arranged within a few weeks to
7 K5 ?4 E. G) \, d+ Nobtain testicular and abdominal sonograms; how-4 a' H- T0 B* w3 X% f
ever, the family did not return for 4 months.
* K8 B7 ]0 [6 @' Z1 Y3 hPhysical examination at this time revealed that the
+ Q5 b0 `3 v6 v* t S. ]# Jchild had grown 2.5 cm in 4 months and had gained8 V4 j0 `* o. F4 G
2 kg of weight. Physical examination remained* @& L6 C/ u9 S* D, u! ~
unchanged. Surprisingly, the pubic hair almost com-( z4 K3 S" a9 a! @$ b2 `
pletely disappeared except for a few vellous hairs at
& m! v% s1 z$ W* I3 |9 Q, r! Vthe base of the phallus. Testicular volume was still 2/ F( o* V4 a) E- M4 N N4 v2 q
mL, and the size of the penis remained unchanged.4 v7 y, ]+ M5 \0 t" s7 s
The mother also said that the boy was no longer hav-
" ~4 s( v6 b) t* M" S/ g# |$ L ling frequent erections.
" V, t) `- Y1 W; \. NBoth parents were again questioned about use of" h% R3 O; K! v0 f( }
any ointment/creams that they may have applied to
, g, h. P. @. N# E' Dthe child’s skin. This time the father admitted the: I; R: Y" o; O2 r. r8 n
Topical Testosterone Exposure / Bhowmick et al 541
( O6 `4 Q2 T4 l% H# Buse of testosterone gel twice daily that he was apply-
0 W7 G, a6 R! }' d+ {6 wing over his own shoulders, chest, and back area for% r; L/ c, h W' m
a year. The father also revealed he was embarrassed
( ^# T F0 g" ^: Zto disclose that he was using a testosterone gel pre-
7 Z& A; R) O# b, y7 i. N. oscribed by his family physician for decreased libido/ u( d+ _; z. C( I9 m
secondary to depression.
7 I( a2 u! Z6 B( ?- z$ b3 iThe child slept in the same bed with parents.) r: [6 E# t' c8 h+ ?0 ~- J
The father would hug the baby and hold him on his" ^# s" C' }# s7 ?8 C" l
chest for a considerable period of time, causing sig-8 r4 h1 u+ D# Q% ?
nificant bare skin contact between baby and father.
# Y* e' b5 l z# h# XThe father also admitted that after the phone call,
* V8 _5 m2 w o3 p/ y; Iwhen he learned the testosterone level in the baby7 Y2 G) m' n% ^2 C# T0 F
was high, he then read the product information
2 d2 g3 p& L, l6 T1 G* l# \packet and concluded that it was most likely the rea-# T* y0 H+ Y- X L- @4 }: x
son for the child’s virilization. At that time, they
! P4 b* L6 }9 u9 Q+ m7 _$ rdecided to put the baby in a separate bed, and the
3 X, W# \8 @9 Y/ D! Nfather was not hugging him with bare skin and had
- L3 V! F2 A$ zbeen using protective clothing. A repeat testosterone
; k- s7 A/ c3 s2 Gtest was ordered, but the family did not go to the* O8 v8 t% N1 b
laboratory to obtain the test.8 g U, _4 y" L3 c! o0 ]
Discussion
' U3 M3 B3 K8 l8 c, kPrecocious puberty in boys is defined as secondary3 a& o; B# J' R6 `! P4 j) G$ v- F
sexual development before 9 years of age.1,4
3 N' a3 h; \! Q% q2 C dPrecocious puberty is termed as central (true) when
# {- L0 o* w7 W' Z; Kit is caused by the premature activation of hypo-
8 t ^9 _; Z. ?# J- }thalamic pituitary gonadal axis. CPP is more com-. E; B) C x5 G$ Q9 k7 L
mon in girls than in boys.1,3 Most boys with CPP
% ?& a6 U2 M) f9 h5 |+ T, e. rmay have a central nervous system lesion that is- B! u& |+ g% T
responsible for the early activation of the hypothal-3 s) C$ u$ t1 n( b m* A: @, d
amic pituitary gonadal axis.1-3 Thus, greater empha-. `8 F2 z% T, N0 _7 A3 \
sis has been given to neuroradiologic imaging in
# P5 }" P% Z0 }8 Mboys with precocious puberty. In addition to viril-
/ v0 y: y: D$ }) Y& D9 `ization, the clinical hallmark of CPP is the symmet-: e% K0 h* ]& Y- D7 A- b: R
rical testicular growth secondary to stimulation by
( v+ l( I0 Q r( B# v4 Vgonadotropins.1,3& ?: R) }/ E4 o$ W5 n* M% T- {
Gonadotropin-independent peripheral preco-
) z( x [7 @: Scious puberty in boys also results from inappropriate; ~; Z& P. Z, U
androgenic stimulation from either endogenous or
2 n" V1 k/ B' F0 Y/ l" y1 Iexogenous sources, nonpituitary gonadotropin stim-) g5 o* Y! V6 H! C$ D8 m
ulation, and rare activating mutations.3 Virilizing( w4 S8 p. @9 B7 D2 ~. Q
congenital adrenal hyperplasia producing excessive- C1 G+ c5 s) ]* I0 Z
adrenal androgens is a common cause of precocious( d3 e! W8 r4 J+ l0 S- f8 A
puberty in boys.3,4- X) b6 L" v6 z; n! ?
The most common form of congenital adrenal
! {6 T1 O/ F: n8 l7 y. Zhyperplasia is the 21-hydroxylase enzyme deficiency.
. y9 Q2 f. P7 s% N8 O& l3 nThe 11-β hydroxylase deficiency may also result in
' I$ E) w, o# Y2 V3 K* ?excessive adrenal androgen production, and rarely,' Q7 B: C2 T, N) d
an adrenal tumor may also cause adrenal androgen
. `) d2 _* m Gexcess.1,3; a* }0 ^8 e) E# f* f
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from+ T6 s2 k! A2 S+ u) z3 [& _
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007/ t' J. E/ M) [2 i
A unique entity of male-limited gonadotropin-4 v8 t# R5 `/ J) {; z; }- N3 F" P" b
independent precocious puberty, which is also known
) R' G; r# j0 l9 |! ~# yas testotoxicosis, may cause precocious puberty at a
* y! R4 {- Q/ a# o$ f3 n4 P) |very young age. The physical findings in these boys
2 r7 i, h0 ^4 N+ w* ]8 u6 o1 ?with this disorder are full pubertal development,5 i* s2 v8 Y3 W$ p$ S
including bilateral testicular growth, similar to boys
, H6 k4 L1 z$ P2 Q$ D4 Fwith CPP. The gonadotropin levels in this disorder
0 b9 S( H" b) w, _7 X* j: Q" j# u" I7 {are suppressed to prepubertal levels and do not show
2 a& j: v& C3 [' ~' a; Epubertal response of gonadotropin after gonadotropin-8 ], v" \) t5 ?. j, d4 B
releasing hormone stimulation. This is a sex-linked
/ ~ ^. t9 L0 M. g2 d2 p) Cautosomal dominant disorder that affects only
$ i* Q* |9 Q1 I. P U! cmales; therefore, other male members of the family) X! x% o6 H4 d% f$ ]
may have similar precocious puberty.3
. r w6 g6 j0 H) i3 D$ RIn our patient, physical examination was incon-
$ o. ]% h% f; r& \sistent with true precocious puberty since his testi-: v0 J6 Q" ^) V2 q- e& f$ B0 `0 y
cles were prepubertal in size. However, testotoxicosis1 ?8 w7 u& P& c) _- c
was in the differential diagnosis because his father& C3 J/ n# v' Q; v
started puberty somewhat early, and occasionally,* D; M) k0 {3 ~
testicular enlargement is not that evident in the' t" ]. a( W) w
beginning of this process.1 In the absence of a neg-
( B) \9 i5 I& ^! V0 r# Native initial history of androgen exposure, our" K) q% \4 h$ c" T+ [! m" |
biggest concern was virilizing adrenal hyperplasia,
, P$ {4 G; y2 C6 xeither 21-hydroxylase deficiency or 11-β hydroxylase
3 Z) |( Y( p9 N+ C7 s3 y2 N8 Jdeficiency. Those diagnoses were excluded by find-
$ H. {, u g1 o; c" q# q" Jing the normal level of adrenal steroids.: ~5 n1 @+ }- B E e
The diagnosis of exogenous androgens was strongly0 U" i) @% W4 g( D. y$ i% Q/ f
suspected in a follow-up visit after 4 months because
- y s! a6 }! l* [$ Ethe physical examination revealed the complete disap-
& ^- l5 G1 j- u. V- ?1 }pearance of pubic hair, normal growth velocity, and
4 B! s0 c& H: {/ H- Wdecreased erections. The father admitted using a testos-' h+ e$ l9 F$ d" G, M
terone gel, which he concealed at first visit. He was/ y% I( ?' T9 v+ z$ ?
using it rather frequently, twice a day. The Physicians’
- B1 |! X) b+ F" aDesk Reference, or package insert of this product, gel or4 {7 d. U( f0 V7 q; V: q
cream, cautions about dermal testosterone transfer to1 R$ X8 G h k8 X8 j
unprotected females through direct skin exposure.
1 C" Z4 i8 W2 }; Q+ a3 H& J! TSerum testosterone level was found to be 2 times the, g; ]6 R4 f6 q
baseline value in those females who were exposed to
8 p5 k6 g: n- _* a7 k, k& V' Feven 15 minutes of direct skin contact with their male
$ B' N9 S: @1 m. P& Y ?9 ]partners.6 However, when a shirt covered the applica-2 Y& e- N, `5 l) S# x/ n( G0 r# J
tion site, this testosterone transfer was prevented.
. ^3 b0 ~3 d5 p9 Q7 g) VOur patient’s testosterone level was 60 ng/mL,: T: I( r1 y& Z4 ^7 f# n6 X3 [
which was clearly high. Some studies suggest that: a$ B" j$ Q) m8 p6 F
dermal conversion of testosterone to dihydrotestos-
; [" ~* D2 H. a! F0 hterone, which is a more potent metabolite, is more, }- q5 B0 x/ V
active in young children exposed to testosterone: f+ T- H" L( I7 a, ^4 F% H2 }6 k! v9 f
exogenously7; however, we did not measure a dihy-
* f8 K. P6 @% }0 {1 Zdrotestosterone level in our patient. In addition to
6 G3 {+ U6 D0 C! ?9 Avirilization, exposure to exogenous testosterone in3 q! U1 i0 g$ s2 G- I
children results in an increase in growth velocity and% }1 r9 @$ E) Y' p0 t
advanced bone age, as seen in our patient.# H9 e3 t' C2 p( Q1 O
The long-term effect of androgen exposure during
' W( h+ A; _; R4 O- F, p: D, L4 qearly childhood on pubertal development and final
: s0 X, a- y8 G4 v% b# aadult height are not fully known and always remain# F- b; _* R" S" _% `6 b
a concern. Children treated with short-term testos-" [. C! H& P6 g+ [# S% u* {
terone injection or topical androgen may exhibit some
$ c+ }0 p, M1 I" Z) dacceleration of the skeletal maturation; however, after
9 _, V" z" s. O3 `; @8 m' Zcessation of treatment, the rate of bone maturation
# w; C* P$ n$ |decelerates and gradually returns to normal.8,9
7 }# b' [, r8 D/ j( w& U2 kThere are conflicting reports and controversy
3 s6 ?0 ^9 H# {, S j1 xover the effect of early androgen exposure on adult5 z! o) I# @( E7 q* m- ~
penile length.10,11 Some reports suggest subnormal" Z& B; J# b& F6 w& J
adult penile length, apparently because of downreg-5 \/ q& D. K, ?7 z R! b
ulation of androgen receptor number.10,12 However,
1 l4 h) t# _2 z. J& _Sutherland et al13 did not find a correlation between* N/ S, G0 B) I2 ^
childhood testosterone exposure and reduced adult8 b. \9 P% S+ o' G$ G8 Q
penile length in clinical studies.
6 E4 X7 ^/ ` R" O" s& `Nonetheless, we do not believe our patient is
/ X% G( |# f* v5 a; [5 f( ~ Ggoing to experience any of the untoward effects from; O/ D* f- I! a5 f7 l; Y
testosterone exposure as mentioned earlier because6 W- m* m% R { i( {( | ^$ Y
the exposure was not for a prolonged period of time.
$ V! Y, f1 f8 o9 TAlthough the bone age was advanced at the time of X5 l s0 ]$ C. i9 A, Q/ B, M
diagnosis, the child had a normal growth velocity at9 p+ c y- ~8 Z: K8 l
the follow-up visit. It is hoped that his final adult( G0 E0 L+ z, q0 a
height will not be affected.
5 Q8 S2 w8 K/ ]( J+ i+ `0 ? K# ]" uAlthough rarely reported, the widespread avail-0 y( }0 @( [4 M, T+ X( I
ability of androgen products in our society may# R3 I- I |$ I2 d
indeed cause more virilization in male or female
& a8 h6 F$ [$ L; J$ J8 Achildren than one would realize. Exposure to andro-
: W7 p2 {2 p5 R4 {! z+ D' @gen products must be considered and specific ques-: Z( }& U" R1 K7 J- |" N/ a
tioning about the use of a testosterone product or
5 b) X3 N4 c( ?' O0 q2 Igel should be asked of the family members during
1 m9 |' R6 s4 T1 R. mthe evaluation of any children who present with vir-
# ?! I6 U5 M/ e- S7 i7 tilization or peripheral precocious puberty. The diag-4 w) C% T+ [" J" {1 T7 F' e, C
nosis can be established by just a few tests and by
8 R" C' j# G1 Z7 q2 M$ m& Pappropriate history. The inability to obtain such a
; q f- F- \; _0 }7 Ihistory, or failure to ask the specific questions, may
! m; ~2 z* l3 \! H* W8 c3 R9 T9 ?result in extensive, unnecessary, and expensive
% o z* K% {: {& Q; zinvestigation. The primary care physician should be
7 _5 H m" h& {* V6 | Paware of this fact, because most of these children3 ~- w7 y: l" j4 Z# b' X7 |
may initially present in their practice. The Physicians’ F$ L6 A4 J4 R, u- b
Desk Reference and package insert should also put a0 X# m8 D* s9 \) N- f: `
warning about the virilizing effect on a male or
8 S; r( }( H5 ofemale child who might come in contact with some-
& t1 X7 e9 K( Rone using any of these products.
. o2 h/ u% S# B$ _ o+ e: tReferences
' h# q9 h* q& i3 V9 v8 X6 Y1. Styne DM. The testes: disorder of sexual differentiation' {, s w1 [9 Z* T
and puberty in the male. In: Sperling MA, ed. Pediatric- j# o }/ b5 ~$ N9 [3 F
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
* `8 _$ e. J$ j( W# F2002: 565-628.0 c' U8 X% I7 o2 E& g
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious! j5 M, r, d3 C7 D2 z
puberty in children with tumours of the suprasellar pineal+ }- I6 c. C& C3 h2 m8 Y. l
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areas: organic central precocious puberty. Acta Paediatr.
' f v4 X1 Z& B0 C [& u! m5 @2001;90:751-756.
$ Z' V# _6 _2 g" W3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.+ w/ Z6 f: ~0 M1 \0 D C6 h
Pediatric Endocrinology. 4th ed. New York, NY: Marcel t( H$ c* } t6 n8 i
Dekker Inc; 2003:211-238.( o0 ~2 T% j* T; N
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
8 ~3 ~$ R, O$ Y* {* Xdevelopment in a two-year-old boy induced by topical" @" k7 N1 w s! s) U
exposure to testosterone. Pediatrics. 1999;104:e23.1 F7 _& ?$ ~0 |2 s) V7 `+ e, k6 I
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of! d0 Y( b4 u8 X
Skeletal Development of the Hand and Wrist. 2nd ed.
7 V) q5 @ [0 LStanford, CA: Stanford University Press; 1959.
- o- k9 r( p. C; \/ C6. Physicians’ Desk Reference. Androgel 1% testosterone,' J* A' u1 \7 O" F
Unimed Pharmaceutical Inc. Montvale, NJ: Medical' z E/ ]# k. p7 ^7 ~, V. P1 {
Economics Company, Inc; 2004:3239-3241.
. ` {2 f$ x' _6 b! }9 r7. Klugo RC, Cerny JC. Response of micropenis to topical- P4 j% a0 g% w+ J8 g
testosterone and gonadotropin. J Urol. 1978;119:
. `; |3 ?4 P2 z6 M1 O7 H667-668.
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