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is a significant concern for physicians. Central5 Z- d) O% N1 W$ \; @& f3 {
precocious puberty (CPP), which is mediated4 [* O( U3 Z6 N) z0 M' Y* {+ }, O/ H
through the hypothalamic pituitary gonadal axis, has
! G$ b. R7 b# n2 x3 C4 ya higher incidence of organic central nervous system
: j9 U" w0 o( P v1 ]lesions in boys.1,2 Virilization in boys, as manifested
1 \# Y1 f6 D, B# qby enlargement of the penis, development of pubic
, e1 R0 U! ^9 X7 i1 ?hair, and facial acne without enlargement of testi-, @; Z7 z4 d9 c3 k: o. S2 k
cles, suggests peripheral or pseudopuberty.1-3 We; b% V8 ?3 \9 B6 C) ]8 W
report a 16-month-old boy who presented with the* C: `- r( _8 I2 E5 \
enlargement of the phallus and pubic hair develop-! Y; J- |1 j* _: P* M
ment without testicular enlargement, which was due; m1 r$ W7 W6 z6 ~
to the unintentional exposure to androgen gel used by# j& g0 y1 ]/ D( g
the father. The family initially concealed this infor-' X5 o( V2 Z" V: k& @: h6 o3 j" y
mation, resulting in an extensive work-up for this
3 Z% l- i4 N/ I6 W" c& Rchild. Given the widespread and easy availability of
( X+ o1 ]9 t- [. W. b5 H, vtestosterone gel and cream, we believe this is proba-5 |6 p) O; \( n2 ?# O7 C) `
bly more common than the rare case report in the. E7 V6 _; j2 C
literature.4- a6 P, e$ g" F
Patient Report' ~( H! W8 S' \" | f4 c
A 16-month-old white child was referred to the
% T6 r: a) |% ?+ _( {endocrine clinic by his pediatrician with the concern( [0 j: d) ]- r% ]& o( r. t' e
of early sexual development. His mother noticed/ x1 x7 J- m. l! k' G, T' g2 l* m$ A
light colored pubic hair development when he was
) y6 v) C# C3 L* T/ U- G8 ]" S) v1 ?From the 1Division of Pediatric Endocrinology, 2University of
) O5 ?( M7 u. e% V' D: kSouth Alabama Medical Center, Mobile, Alabama.
1 T( d ]2 B4 ]1 c) a& R( x5 O4 n/ H# SAddress correspondence to: Samar K. Bhowmick, MD, FACE,
- b6 _; p+ |( g0 L2 `5 W+ hProfessor of Pediatrics, University of South Alabama, College of) C9 w: y# y; S0 K# V* M# W% G
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
3 k9 s) b! L D8 be-mail: [email protected]., a- Q* ?2 E5 R
about 6 to 7 months old, which progressively became
/ T" I. e x; K8 }) u* p( ^: ]darker. She was also concerned about the enlarge-% n. q& M y* D
ment of his penis and frequent erections. The child" `* o! N6 H. c' {: p. A) a
was the product of a full-term normal delivery, with2 m9 }* W( j9 h/ Y# l* T3 j
a birth weight of 7 lb 14 oz, and birth length of: s% [6 h' z, ~' y4 {
20 inches. He was breast-fed throughout the first year
& G6 D8 n; P! P4 J7 wof life and was still receiving breast milk along with d6 v: o- Y) S3 w
solid food. He had no hospitalizations or surgery,- u' U7 `. R8 a8 p7 A' r
and his psychosocial and psychomotor development
/ ^4 @. V( b' a9 uwas age appropriate.3 J7 H2 o3 P& l: Q( d% V( r
The family history was remarkable for the father,
+ s1 X, F) p: m+ ?3 v' z! jwho was diagnosed with hypothyroidism at age 16,0 M5 M! M5 q3 n& Q
which was treated with thyroxine. The father’s
0 X; e' w4 W, r1 Theight was 6 feet, and he went through a somewhat- Z0 {) r& k7 o+ l6 u
early puberty and had stopped growing by age 14.- p# D. a) k& a5 k; p- ?) E
The father denied taking any other medication. The8 `8 @% P* ^) K
child’s mother was in good health. Her menarche
t. ^* v, n5 E5 j) J5 owas at 11 years of age, and her height was at 5 feet7 Z; x* ?4 N! O0 Q
5 inches. There was no other family history of pre-4 j/ X/ d: ^4 s
cocious sexual development in the first-degree rela-
2 G, P+ G8 U) b, m% dtives. There were no siblings.
1 C. s" }) D8 L% _Physical Examination
$ n; ?" M8 [4 B4 [9 G" f% qThe physical examination revealed a very active,
( W( f9 f, f4 Pplayful, and healthy boy. The vital signs documented8 R; _- }( j1 x' u! Z+ O8 }
a blood pressure of 85/50 mm Hg, his length was
; A5 n [& ? Q90 cm (>97th percentile), and his weight was 14.4 kg
M+ x; ?! J, U- h(also >97th percentile). The observed yearly growth; \9 r: x! c. ?% V4 S
velocity was 30 cm (12 inches). The examination of. |" ]8 l- U- g
the neck revealed no thyroid enlargement.
5 M: y9 ^6 o- q$ xThe genitourinary examination was remarkable for
4 l; R) W' G4 j2 X7 f- G( Ienlargement of the penis, with a stretched length of6 M1 b$ a) r- |6 a; x
8 cm and a width of 2 cm. The glans penis was very well! c+ E9 k8 F4 v# S8 c
developed. The pubic hair was Tanner II, mostly around
, d. Y; v/ d9 y7 Y8 K540
' ~. C% o9 [& \9 m9 [5 m7 C W8 `at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
! I; {; s4 w5 g2 ~% s7 B- rthe base of the phallus and was dark and curled. The
8 |( S/ G# G$ K& P' K- P/ vtesticular volume was prepubertal at 2 mL each.2 m3 u: h8 _* V& d" n% `$ W
The skin was moist and smooth and somewhat) C1 G1 q# l/ p
oily. No axillary hair was noted. There were no" d1 j! T1 W/ U& K. M
abnormal skin pigmentations or café-au-lait spots.
! a& r J! ~5 B9 }Neurologic evaluation showed deep tendon reflex 2+
* j! ?) G2 G2 Xbilateral and symmetrical. There was no suggestion
1 Z- l" J, M( Y* \: W' Hof papilledema.( c8 l& i+ \& w
Laboratory Evaluation
5 y9 W( L* a, NThe bone age was consistent with 28 months by" g4 d' U1 |0 q( O( P& e
using the standard of Greulich and Pyle at a chrono-; I( P9 Q+ q5 v- l. t$ m' i
logic age of 16 months (advanced).5 Chromosomal0 q# J* `6 w* x, p* d1 L3 ~
karyotype was 46XY. The thyroid function test
! w/ Q0 h' G1 x& j/ |- `( gshowed a free T4 of 1.69 ng/dL, and thyroid stimu-* m: B# s5 o! w1 y, s
lating hormone level was 1.3 µIU/mL (both normal).6 R& G/ q( I* W8 d; v$ W! O8 z/ j
The concentrations of serum electrolytes, blood
! ?: @, j% W/ @3 H, ~7 burea nitrogen, creatinine, and calcium all were% S2 E- D0 _" C2 J
within normal range for his age. The concentration& g, |! m/ p% B, T9 K% D
of serum 17-hydroxyprogesterone was 16 ng/dL5 Q( d) a; `5 l1 T2 H
(normal, 3 to 90 ng/dL), androstenedione was 20
9 D! u( m. j! M {4 Xng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-, ]9 X$ u2 B9 }3 d f3 a
terone was 38 ng/dL (normal, 50 to 760 ng/dL),9 V; ?0 @$ |' @) q+ Q0 K
desoxycorticosterone was 4.3 ng/dL (normal, 7 to- J+ U6 p' Z# k
49ng/dL), 11-desoxycortisol (specific compound S)
, r1 G- i7 O& Z; awas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-, N3 u0 ] w. s1 ?* [
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
- }! |- K7 R& z# _testosterone was 60 ng/dL (normal <3 to 10 ng/dL),; t6 V" b3 O7 ]
and β-human chorionic gonadotropin was less than E+ n4 k- f6 N* }1 S
5 mIU/mL (normal <5 mIU/mL). Serum follicular
, U! P5 U( k3 W$ _" J4 Rstimulating hormone and leuteinizing hormone
8 `4 J p/ ~3 ~2 ?6 a. N( n3 sconcentrations were less than 0.05 mIU/mL
/ d9 [, j3 K8 y) j(prepubertal)." b7 p/ Q! A( z
The parents were notified about the laboratory
# C9 `$ I* `6 xresults and were informed that all of the tests were
' D4 R6 t) p+ w4 x" Dnormal except the testosterone level was high. The1 ^$ H: p( t3 Y! D$ |9 ~
follow-up visit was arranged within a few weeks to
1 C. }, \. b- sobtain testicular and abdominal sonograms; how-
1 q! N4 f- I4 ~/ |ever, the family did not return for 4 months.2 j+ T( Z1 R. i# Y
Physical examination at this time revealed that the" W5 o q+ ~0 l3 F3 Z' r* t
child had grown 2.5 cm in 4 months and had gained
1 B1 S9 |2 c9 i/ n8 R2 kg of weight. Physical examination remained) h/ H* b4 f0 m6 b9 E. N( S* z$ J
unchanged. Surprisingly, the pubic hair almost com-) P' \, H9 g9 g1 M* ^: c
pletely disappeared except for a few vellous hairs at
- ~4 j2 Y. a# k) C3 Vthe base of the phallus. Testicular volume was still 2
: V8 d) y1 V; G7 FmL, and the size of the penis remained unchanged.
/ o8 V) I0 y" g) w9 HThe mother also said that the boy was no longer hav-$ J0 P9 x0 U0 W X7 Z8 Q6 T" z
ing frequent erections.3 l I. Q/ C; S
Both parents were again questioned about use of
# ^( V! _( E: z* |8 ~5 k* g+ dany ointment/creams that they may have applied to, q4 m& k( t6 J. W" q, H
the child’s skin. This time the father admitted the/ D- {/ }: c. ]# p3 q
Topical Testosterone Exposure / Bhowmick et al 541
; v1 v8 |, a1 h; r2 \. B: Iuse of testosterone gel twice daily that he was apply-
# t5 u5 r- @1 Y' sing over his own shoulders, chest, and back area for
2 Z8 Q6 I8 e% P4 R/ ?9 I! sa year. The father also revealed he was embarrassed
( j- A, @1 v- G" @# g, \; o gto disclose that he was using a testosterone gel pre-
& d1 o1 O6 l3 v& { h$ R6 h1 Uscribed by his family physician for decreased libido
' d. j' c5 w( f. u- Q" Z+ qsecondary to depression.
& ^" E: D% _ b0 IThe child slept in the same bed with parents.
0 t z2 @& V. n% _; i2 O/ t" bThe father would hug the baby and hold him on his" D$ @8 r# Y% u' a
chest for a considerable period of time, causing sig-
1 e- J6 j0 L1 bnificant bare skin contact between baby and father.. t- n, a" I" x8 M7 r1 G5 s
The father also admitted that after the phone call,0 F5 f) u/ S5 u/ _* \
when he learned the testosterone level in the baby
9 _7 L, P5 d* U3 b9 Vwas high, he then read the product information4 c6 A V& f$ k. `3 o
packet and concluded that it was most likely the rea-- q4 p% y, V/ _( C
son for the child’s virilization. At that time, they
/ V# D; Q/ t+ cdecided to put the baby in a separate bed, and the
/ a. i/ ]6 {- s; w: h) ^father was not hugging him with bare skin and had6 @; O' J% d0 T
been using protective clothing. A repeat testosterone
% U# Y3 Z' o' w+ X8 ~8 \- Ytest was ordered, but the family did not go to the
: X/ @) @" o( o5 s% O9 `laboratory to obtain the test.' B4 f6 W! u( z) O; \$ K/ p
Discussion
1 a2 i* S, C# ]% i- DPrecocious puberty in boys is defined as secondary: V/ C( I2 ~& x, i3 G
sexual development before 9 years of age.1,48 s- @' q4 v2 q- y; L0 c8 L6 @
Precocious puberty is termed as central (true) when
7 q- w( O6 j3 p3 ~0 g& H- ]- L" Fit is caused by the premature activation of hypo-+ b. p, ~5 e% @( v
thalamic pituitary gonadal axis. CPP is more com-
% v$ Z; l& `$ K% n( n' Emon in girls than in boys.1,3 Most boys with CPP
5 x6 z' ^ n3 G+ o1 Gmay have a central nervous system lesion that is
+ N% c6 P' ?' r) oresponsible for the early activation of the hypothal-
: {4 b: z) {) S/ Uamic pituitary gonadal axis.1-3 Thus, greater empha-5 C) _$ F2 _. N- m; c
sis has been given to neuroradiologic imaging in
( T: k j# B1 m) cboys with precocious puberty. In addition to viril-
. D) f6 h) a) d/ J4 Aization, the clinical hallmark of CPP is the symmet-
6 {" S+ {. ^- ^- jrical testicular growth secondary to stimulation by, G# `% J- b0 Y+ S' A! L
gonadotropins.1,3& @- O1 M" \; \
Gonadotropin-independent peripheral preco-' _: W8 w. G& p/ F3 K, Y/ h- F
cious puberty in boys also results from inappropriate1 a! v7 [" u) D# b( V
androgenic stimulation from either endogenous or
3 V5 }; R/ ?7 k2 P* I1 F1 o% ?+ Hexogenous sources, nonpituitary gonadotropin stim-# G4 [' O1 }6 G" M; n
ulation, and rare activating mutations.3 Virilizing5 O1 \8 m: ]2 g
congenital adrenal hyperplasia producing excessive0 P& g. n) @0 B& |0 Z# I! r
adrenal androgens is a common cause of precocious
; ^6 L+ T1 I7 {4 I4 Y0 ipuberty in boys.3,4
/ \- q& [: t/ i0 iThe most common form of congenital adrenal
/ [) A, y, _2 R9 ahyperplasia is the 21-hydroxylase enzyme deficiency.) d2 g, K, z Q v3 z# W
The 11-β hydroxylase deficiency may also result in, _% B2 e# _% R# q6 U
excessive adrenal androgen production, and rarely,
: z8 O3 E& W+ Q! D Wan adrenal tumor may also cause adrenal androgen: e. `4 I X& y- w P, ?" y
excess.1,3
* r a \2 Y' m) D! H$ cat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& D) {$ B9 l+ d! N0 y7 M542 Clinical Pediatrics / Vol. 46, No. 6, July 2007$ P* c: i) V# N9 s0 Z! }) U
A unique entity of male-limited gonadotropin-5 i1 t0 o- T0 S+ v6 C, E
independent precocious puberty, which is also known
$ e) K1 `: p |, m* x0 ?! H6 Q3 z1 oas testotoxicosis, may cause precocious puberty at a
! j1 \+ a. z: z/ f9 J9 Wvery young age. The physical findings in these boys- z x6 I( P% b" M8 t4 r
with this disorder are full pubertal development,$ f* g; }% O# e8 |$ j" ]/ ~8 N* j
including bilateral testicular growth, similar to boys
6 N8 O: t7 a) M* [with CPP. The gonadotropin levels in this disorder
6 f. f- r8 s F" xare suppressed to prepubertal levels and do not show
& E. E9 @ P i4 [3 I$ ppubertal response of gonadotropin after gonadotropin-4 h3 I& U4 W% N& V' O/ ?! I
releasing hormone stimulation. This is a sex-linked
+ Q% k; V2 Q/ b9 X3 C' \autosomal dominant disorder that affects only
' R$ N2 E/ R% B' S5 o0 dmales; therefore, other male members of the family
" v! [8 j; Y5 ]' _1 q5 z7 a+ _4 jmay have similar precocious puberty.38 y" @$ A: B+ H8 q/ {
In our patient, physical examination was incon-
! A" m% U) X& H) wsistent with true precocious puberty since his testi-, Y: E$ U2 O! ? [/ q
cles were prepubertal in size. However, testotoxicosis$ M" |; J8 j& i4 i
was in the differential diagnosis because his father
* u- @. j4 Z0 \6 R5 n( k$ N# p/ ?started puberty somewhat early, and occasionally,
' U- `: _& _( @testicular enlargement is not that evident in the
% _% X) X2 ~) Q2 O% ^6 n6 C" sbeginning of this process.1 In the absence of a neg-
. ^0 w" |# P) a! u! fative initial history of androgen exposure, our
3 \/ z2 c3 n; @biggest concern was virilizing adrenal hyperplasia,
7 o. B+ T7 u, T% y+ E- z8 Y6 ieither 21-hydroxylase deficiency or 11-β hydroxylase
* F6 g% p* o8 V! Edeficiency. Those diagnoses were excluded by find-
& Y0 E8 Q7 ?" ]% n) A# u: ding the normal level of adrenal steroids.2 l6 X$ \6 |6 D0 s/ w" h! R
The diagnosis of exogenous androgens was strongly L: B0 r& C4 H
suspected in a follow-up visit after 4 months because! W/ L% w+ b' o- @) [
the physical examination revealed the complete disap-, G1 F; y6 f+ `0 {( |
pearance of pubic hair, normal growth velocity, and
/ K; M+ v9 Q: d1 K9 d( Qdecreased erections. The father admitted using a testos-3 o: X7 j5 O; |" h! I# Z
terone gel, which he concealed at first visit. He was" N- D" b, ]' Z7 n) c9 {, }% d
using it rather frequently, twice a day. The Physicians’
, `* c# S: ^/ kDesk Reference, or package insert of this product, gel or8 u7 A) A: z8 w/ R1 g# v# ?
cream, cautions about dermal testosterone transfer to5 W/ |3 U5 Q5 i+ x
unprotected females through direct skin exposure.3 i8 p! h, Y2 F& j7 I6 J! b, |( T
Serum testosterone level was found to be 2 times the
' j) Q3 Z: c5 m* x. z3 Rbaseline value in those females who were exposed to: l* Z" I0 c6 I' F
even 15 minutes of direct skin contact with their male
* H, l1 |$ T4 i( x) bpartners.6 However, when a shirt covered the applica-
5 M2 i1 I2 C2 E1 Q) xtion site, this testosterone transfer was prevented.& J9 N' O8 F) ]& Y* G0 D5 R
Our patient’s testosterone level was 60 ng/mL,
! ^ G- E5 |# \* s, a! Awhich was clearly high. Some studies suggest that- ]! x; a4 |. D/ b6 s' s% f
dermal conversion of testosterone to dihydrotestos-
, {( j! Y/ M* Z0 ]/ s) hterone, which is a more potent metabolite, is more
. A. F6 m. a5 o" m/ ? y! cactive in young children exposed to testosterone* a, h! B$ ?, j( v
exogenously7; however, we did not measure a dihy-
( B* J6 k$ |# K/ O4 jdrotestosterone level in our patient. In addition to4 {8 Q, O2 J3 l" Y
virilization, exposure to exogenous testosterone in
: F" w; R* @ S" j N2 {+ o+ Dchildren results in an increase in growth velocity and+ X J. X6 [" _8 |/ w" J" ~% o3 N
advanced bone age, as seen in our patient.2 ?, @/ I' k6 a- ~- A& o! x8 x# O
The long-term effect of androgen exposure during
; L$ R! J0 q0 w( ~early childhood on pubertal development and final
/ T/ x( `8 i2 }+ s2 c! dadult height are not fully known and always remain g+ j1 r) ?, c6 T
a concern. Children treated with short-term testos-3 r# i/ {& W3 R
terone injection or topical androgen may exhibit some
7 E) x$ u6 {7 E" k" p; `$ Pacceleration of the skeletal maturation; however, after3 e" V* R" C) B( y' R) D5 |% [
cessation of treatment, the rate of bone maturation8 E& i, b; H2 n4 g
decelerates and gradually returns to normal.8,9% ]0 L: p9 @+ C4 K) S) q3 D
There are conflicting reports and controversy
6 |/ N3 i& @6 o" ~# R" t! K _over the effect of early androgen exposure on adult
, Y9 K: Q) u1 c' fpenile length.10,11 Some reports suggest subnormal, @7 `4 q) l ?( Z7 d6 w* k% ]+ u
adult penile length, apparently because of downreg-$ |8 }" t, I" d( @7 ~+ D* x+ a" P% N# D5 S
ulation of androgen receptor number.10,12 However,
+ |, ^* ~! o, `4 v* l; qSutherland et al13 did not find a correlation between
n6 K& Q- n7 H3 Ychildhood testosterone exposure and reduced adult
$ b% m' t" K# ~! U# @2 gpenile length in clinical studies.
/ V. s! _# j1 W t# g, d5 N& HNonetheless, we do not believe our patient is
6 e( Q/ A3 {- ~1 Mgoing to experience any of the untoward effects from
. m5 j9 R4 o" l4 }% M) D9 V1 wtestosterone exposure as mentioned earlier because
# p' r% e% W! T+ s3 r/ v+ C8 _the exposure was not for a prolonged period of time.
- P0 y6 o/ Z S' rAlthough the bone age was advanced at the time of
' E" N- M9 t% Vdiagnosis, the child had a normal growth velocity at
$ p, k$ m, t' P U4 _# ~2 Ithe follow-up visit. It is hoped that his final adult, I/ D5 X& O: n/ |
height will not be affected.
; O) Q2 k3 Z+ X% ZAlthough rarely reported, the widespread avail-- a9 y+ i, u3 D& c4 Y" J! d( K% ^
ability of androgen products in our society may' E1 j# ~& R5 l; O9 H# y
indeed cause more virilization in male or female% S, n& q4 Y. K o0 A
children than one would realize. Exposure to andro-
, G( w3 c( H; Mgen products must be considered and specific ques-
& Y9 y0 K5 @; otioning about the use of a testosterone product or9 P- v/ v7 K# |& B8 D% [& p/ d9 K
gel should be asked of the family members during% e) b( u5 ~) r6 b& F" ]2 O1 d, y
the evaluation of any children who present with vir-. u6 z- y( P8 [* H: j0 [
ilization or peripheral precocious puberty. The diag-
2 `" R+ S p7 Bnosis can be established by just a few tests and by
# t" W' a1 }9 [! s' kappropriate history. The inability to obtain such a3 A: L3 [% C5 [( X9 Y+ g
history, or failure to ask the specific questions, may
# o! `8 L3 z: Y, Jresult in extensive, unnecessary, and expensive
' d5 z; @/ m+ Q. ^7 u: l5 cinvestigation. The primary care physician should be
! C% h* r5 ^' v* vaware of this fact, because most of these children4 Y/ a! I7 v! z: |: Q1 n9 w' x
may initially present in their practice. The Physicians’
# w: l: M- m* _, v. sDesk Reference and package insert should also put a9 Q7 g8 ^8 q% m& ~% k6 j+ v+ [
warning about the virilizing effect on a male or% J" M( p5 b( T- z4 p1 ?
female child who might come in contact with some-
0 @4 }8 X( q6 ?+ D5 A' o& Zone using any of these products.
: @) r# c' @- B* Q4 |# oReferences& J7 X2 O- s- z- L4 A6 t: j6 p
1. Styne DM. The testes: disorder of sexual differentiation
5 e; h5 E$ {* Q' yand puberty in the male. In: Sperling MA, ed. Pediatric
$ v' R; p0 U+ B( `Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
6 d4 s6 Y9 }4 x/ }2002: 565-628.
% a7 c- U" y! e8 `2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious B0 r& U( b$ R5 c; _3 C6 M% o
puberty in children with tumours of the suprasellar pineal s( O9 V+ t' ?# |& ~ w
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from) p, ~& c6 _" t- c( o" }" ?
Topical Testosterone Exposure / Bhowmick et al 543- o; |+ N: z0 |* {) j
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& ]4 g% c0 [$ p g# ^- l2001;90:751-756.# ]* n/ C0 f2 {- }0 X
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.( \* c( [- S% F9 ~) X4 B
Pediatric Endocrinology. 4th ed. New York, NY: Marcel/ M) ~1 D6 U+ g9 y! P3 C+ g
Dekker Inc; 2003:211-238.* z& C) s6 M1 D X) G" ?
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual; \! j" s M3 D
development in a two-year-old boy induced by topical
* H/ y+ u& h H: dexposure to testosterone. Pediatrics. 1999;104:e23.
8 F3 W# O7 T" r9 z; T; W, K5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
( R" G' q0 K# E$ \ cSkeletal Development of the Hand and Wrist. 2nd ed., D4 `9 L/ M: D: W( e5 _ B
Stanford, CA: Stanford University Press; 1959.7 H# Q/ _! x3 n: U
6. Physicians’ Desk Reference. Androgel 1% testosterone,
- ?# D" C$ e, M( s: BUnimed Pharmaceutical Inc. Montvale, NJ: Medical" {: M3 u7 N& `
Economics Company, Inc; 2004:3239-3241.. A+ n6 r9 E" O* |5 z S' H
7. Klugo RC, Cerny JC. Response of micropenis to topical9 m' n& o% D1 l/ u, M" E6 _; C
testosterone and gonadotropin. J Urol. 1978;119:. v4 t9 u j# {" O
667-668.! S- c1 f3 ?3 T7 [& `
8. Guthrie RD, Smith DW, Graham CB. Testosterone
" T, B6 Q' }( x& H& j, I: R; G) Jtreatment for micropenis during early childhood. J Pediatr.
" R" B! ]& N& G* b( ^. ?1973;83:247-252.4 B: g# b3 \, }, ^* k: Y6 d
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