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is a significant concern for physicians. Central; _$ t0 D* s" I
precocious puberty (CPP), which is mediated3 ?& e1 d M) B8 U1 X
through the hypothalamic pituitary gonadal axis, has
* G2 R( |8 p/ C' N3 s aa higher incidence of organic central nervous system
$ V. H' c8 H2 B2 U0 K4 Olesions in boys.1,2 Virilization in boys, as manifested# o# O$ h2 n. [6 G! F0 c
by enlargement of the penis, development of pubic
" S7 b. _; g+ a: j B! ]$ {5 E5 S4 Zhair, and facial acne without enlargement of testi-% V; Y+ Z2 b- D9 x% i1 e
cles, suggests peripheral or pseudopuberty.1-3 We) l7 i* T7 A& C J( u% R
report a 16-month-old boy who presented with the/ ~/ ?) Z8 X( G! V" j
enlargement of the phallus and pubic hair develop-
2 G" ?; A# h; t9 c" c5 }0 qment without testicular enlargement, which was due7 i+ l; L. X. e# g, e8 v+ l
to the unintentional exposure to androgen gel used by" n; g' n) S! y+ Y5 R1 T
the father. The family initially concealed this infor-& `+ j, S. a$ y6 R* X. h" \8 g
mation, resulting in an extensive work-up for this4 R% O Q6 l# N% _8 I
child. Given the widespread and easy availability of$ E8 b& P9 {# J. a
testosterone gel and cream, we believe this is proba-) ] M9 U- A( A0 B% K5 L$ i
bly more common than the rare case report in the
( Q& s0 Y4 N" Q# L% |literature.49 m3 Z( @& y0 @2 C
Patient Report
. A, Q) N" L. b" MA 16-month-old white child was referred to the
+ F. _+ S d" ^endocrine clinic by his pediatrician with the concern4 ~6 G3 k3 r' T7 ^3 R
of early sexual development. His mother noticed
. [2 V) Z: T+ K$ A# mlight colored pubic hair development when he was
' L l6 P1 S+ N1 T N. SFrom the 1Division of Pediatric Endocrinology, 2University of D7 W$ L7 `8 U# B2 A, X0 c
South Alabama Medical Center, Mobile, Alabama.
( G4 I$ u- H, d+ H) tAddress correspondence to: Samar K. Bhowmick, MD, FACE,
0 R' a& |" y; p7 gProfessor of Pediatrics, University of South Alabama, College of) ~8 r$ r8 I" ~# I1 T" ~. X
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
* S# A4 c. J- e6 de-mail: [email protected].
8 o3 |/ X& U& J K* [# j0 o4 ^about 6 to 7 months old, which progressively became! h& X: L: n1 [. S# D
darker. She was also concerned about the enlarge-: _& t# X) G( I9 d: u0 ~* L0 Q% s" i; |) Y
ment of his penis and frequent erections. The child
. w! T8 O* F# K) vwas the product of a full-term normal delivery, with
n6 L9 p: F1 Y. \1 K7 @a birth weight of 7 lb 14 oz, and birth length of: Z" I+ _* l* o5 @
20 inches. He was breast-fed throughout the first year, `3 k0 l7 N% q/ `& }
of life and was still receiving breast milk along with8 G# }- _; ]. n) J6 S/ `
solid food. He had no hospitalizations or surgery,$ X. e8 E, E0 M3 O/ m' A
and his psychosocial and psychomotor development
0 g& M) V1 Y3 d7 kwas age appropriate.
X$ ~, H1 \+ EThe family history was remarkable for the father,
@5 F- p3 m: Hwho was diagnosed with hypothyroidism at age 16,
4 z0 I3 |6 ?' S* @* Y+ `& Mwhich was treated with thyroxine. The father’s0 P+ w! o: N$ E! }# Q# [0 D& D
height was 6 feet, and he went through a somewhat* Y: f c4 f0 I9 |
early puberty and had stopped growing by age 14.( }& ^3 u& O2 k* [) W8 t6 R6 A
The father denied taking any other medication. The0 t3 S* B% `; R6 d& N2 Z: L4 ?! R. F
child’s mother was in good health. Her menarche
# u L" y3 K; U9 L* I3 B2 X, ~was at 11 years of age, and her height was at 5 feet9 L+ v! |5 A! {) U) D0 _$ q
5 inches. There was no other family history of pre-
3 e# ?* P7 A8 @7 y/ s& _. _7 F) hcocious sexual development in the first-degree rela-) J7 R! M: q: C
tives. There were no siblings.
4 P* y4 x: k7 \$ j8 ?; APhysical Examination8 `/ M+ ~% \6 p! ]& m: M3 b
The physical examination revealed a very active,
" l7 I7 C. S. {playful, and healthy boy. The vital signs documented# A* o9 z, G. Z8 ?% ^) {) S0 S
a blood pressure of 85/50 mm Hg, his length was# R1 ?- }7 g# V: Z6 ?
90 cm (>97th percentile), and his weight was 14.4 kg. Y$ P' |, M( G1 j7 p2 d! l
(also >97th percentile). The observed yearly growth& l& t9 H% @. j, |# D
velocity was 30 cm (12 inches). The examination of2 w: ]1 x7 ^2 s
the neck revealed no thyroid enlargement.
8 {8 C& d3 l+ O& \- Z# b5 t" e7 cThe genitourinary examination was remarkable for6 {: G; r; s7 ]9 S
enlargement of the penis, with a stretched length of# b P: i; a( i" K- `& V) c
8 cm and a width of 2 cm. The glans penis was very well
/ J5 Y- s8 [8 Z8 ^. g% Xdeveloped. The pubic hair was Tanner II, mostly around( m6 W" \' y+ V% H9 t
540
8 |( u0 B( }- t0 d+ G/ C$ Y6 uat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
5 c# W0 j4 d$ F. m8 `the base of the phallus and was dark and curled. The1 x) x# |+ d x% ]3 U7 W# M% J/ r
testicular volume was prepubertal at 2 mL each.
3 f; S. D* Y2 c& x) V* N; \The skin was moist and smooth and somewhat# l7 l" U P/ f2 t0 [* g* V8 Q8 J
oily. No axillary hair was noted. There were no; c- J, m' p: p. ^% R
abnormal skin pigmentations or café-au-lait spots.# \- y7 q( O7 L. z' C: K
Neurologic evaluation showed deep tendon reflex 2+; w1 K! j5 e+ G" W9 m
bilateral and symmetrical. There was no suggestion
% P* { `' Q5 {9 R5 `+ Dof papilledema.
" e4 [$ W* T9 @3 A( S/ xLaboratory Evaluation% w! q' p P& j0 d
The bone age was consistent with 28 months by( f7 H: ~) v7 N3 \, u; v* {' Y
using the standard of Greulich and Pyle at a chrono-
6 @5 o: {1 ?& X+ b# Hlogic age of 16 months (advanced).5 Chromosomal% ~$ G) y& G W5 Y: |, m$ u
karyotype was 46XY. The thyroid function test
& G- n* V3 M8 [/ W9 ishowed a free T4 of 1.69 ng/dL, and thyroid stimu-
+ V: {8 T0 ?% H+ F7 Jlating hormone level was 1.3 µIU/mL (both normal)." r: `& E7 X y: r+ p( c
The concentrations of serum electrolytes, blood, ^% [8 `' L9 x6 d
urea nitrogen, creatinine, and calcium all were0 M: a$ ?* C# H% q# H
within normal range for his age. The concentration
( u4 R3 V( o! E2 i: kof serum 17-hydroxyprogesterone was 16 ng/dL7 O" ~" o- Y0 s8 c) D
(normal, 3 to 90 ng/dL), androstenedione was 206 o3 ^: A* q( i4 N& \% M; V
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-) R9 C+ N t! C8 E* l
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
+ M+ Z3 o5 V7 |9 gdesoxycorticosterone was 4.3 ng/dL (normal, 7 to
2 c- Z6 M6 H2 m49ng/dL), 11-desoxycortisol (specific compound S)
5 ~" Z {- N3 E1 ^! Qwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
% l% Q: f5 g" [, f+ o* ?, @2 [tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
% J1 {' H% I3 j7 j3 z7 p+ x9 F+ p5 R5 rtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
; U( X$ M' U5 y3 N1 i0 T2 Gand β-human chorionic gonadotropin was less than
" @- {( s6 L0 W9 c" f. w5 mIU/mL (normal <5 mIU/mL). Serum follicular
! a, R: v8 v% _- [! G( Kstimulating hormone and leuteinizing hormone
/ u0 ^3 L6 T" T* r* m5 T5 rconcentrations were less than 0.05 mIU/mL
" Z. D" ?1 t8 K+ @! P% I! d(prepubertal).
: C8 A# @# A4 _% w6 \/ KThe parents were notified about the laboratory& C( v6 W# ^+ `
results and were informed that all of the tests were4 t5 u. J5 G7 b4 y$ N# k* J
normal except the testosterone level was high. The# A3 @" @$ T5 y* j
follow-up visit was arranged within a few weeks to
1 ~" n& f" t$ q# _7 {4 A! B* uobtain testicular and abdominal sonograms; how-
1 h! \3 R+ T) j4 l" Pever, the family did not return for 4 months., N7 P' x1 k2 s$ d8 z7 o
Physical examination at this time revealed that the) }% K! X! }9 L% u8 P, K: F. G/ Y
child had grown 2.5 cm in 4 months and had gained
6 r1 W/ E F5 ?2 kg of weight. Physical examination remained/ P& c8 Z1 ~" m
unchanged. Surprisingly, the pubic hair almost com-
% u# L. \# {5 H. O6 ^1 b' K/ {2 y bpletely disappeared except for a few vellous hairs at
- T5 M7 a1 w' e* P6 Z0 wthe base of the phallus. Testicular volume was still 2
) z9 u4 X; {2 Q7 |* _, r+ i) }" ]mL, and the size of the penis remained unchanged.; V7 u- ~* n1 r N' H; L1 S
The mother also said that the boy was no longer hav-
, f) \1 ?4 Y/ O2 Bing frequent erections.9 f7 O) U1 a0 m% x- h! Q
Both parents were again questioned about use of
. u8 U" A" `- t% Y4 N: D9 eany ointment/creams that they may have applied to
1 M$ M8 \% ~- R( ithe child’s skin. This time the father admitted the6 x% g2 C1 o9 @
Topical Testosterone Exposure / Bhowmick et al 541! n }, H. G: H& t5 A* d
use of testosterone gel twice daily that he was apply-& L" k4 T- Z! E
ing over his own shoulders, chest, and back area for4 ~$ @! f' W G; \( F, V) q2 ~
a year. The father also revealed he was embarrassed
# F' B. I0 x2 b2 ?, _# A% zto disclose that he was using a testosterone gel pre-
4 Q* w4 D" F% A! N; ^6 ~ Hscribed by his family physician for decreased libido) w5 e Y3 M, [& r9 U
secondary to depression.
# s' n+ \) C" ~# K& yThe child slept in the same bed with parents.
( D8 c, O/ ^& s7 H4 D; a9 v0 XThe father would hug the baby and hold him on his5 P8 r" f" q) T. I
chest for a considerable period of time, causing sig-# Z) C5 I, ?% n2 _* p
nificant bare skin contact between baby and father.
8 q# S% L1 j$ [$ v8 pThe father also admitted that after the phone call,
' k+ q* p. o7 I. W. uwhen he learned the testosterone level in the baby5 A/ N1 f) P% _6 a' }0 {. y, _" z
was high, he then read the product information8 v1 ?* \: `* G4 ?" C- U
packet and concluded that it was most likely the rea-* j# B5 _0 h% b! t1 p) C- d
son for the child’s virilization. At that time, they4 t, |$ @. l. k: T
decided to put the baby in a separate bed, and the
! F/ Q: }; f; H3 Tfather was not hugging him with bare skin and had! ?. ~ N) E8 a1 f1 O/ D
been using protective clothing. A repeat testosterone
& f0 V, e# I9 D5 R0 \test was ordered, but the family did not go to the0 f) m9 G6 j$ R) Z
laboratory to obtain the test.1 @6 q! {* Q* M9 V. a6 {9 R
Discussion* [$ g# X' B3 q, b
Precocious puberty in boys is defined as secondary- u% U$ e! o+ c+ N8 b9 p
sexual development before 9 years of age.1,4
& D I5 \3 }4 jPrecocious puberty is termed as central (true) when
5 P# V; |: }8 S. tit is caused by the premature activation of hypo-, A) _) ]! B8 L2 J0 X$ k
thalamic pituitary gonadal axis. CPP is more com-
* Z3 ^3 |# G& S; T* G/ Amon in girls than in boys.1,3 Most boys with CPP
( I* Y8 ?( D% S! z" ?. ~9 R# Gmay have a central nervous system lesion that is
; J: ?; w2 H! |3 i! lresponsible for the early activation of the hypothal-
: i8 i3 I+ B5 W8 famic pituitary gonadal axis.1-3 Thus, greater empha-5 W1 t4 y9 n1 ~( f6 k
sis has been given to neuroradiologic imaging in- }" w' J) C8 m: J9 a
boys with precocious puberty. In addition to viril-
( M6 |) b6 e! O& c1 p: lization, the clinical hallmark of CPP is the symmet-5 O, B# n% F* h0 L
rical testicular growth secondary to stimulation by8 B& m* e* f' @! M
gonadotropins.1,3
! z7 Y3 `+ j9 K1 f5 N# E- h4 AGonadotropin-independent peripheral preco-' Z) f7 n' O O' g" o) r
cious puberty in boys also results from inappropriate9 E$ @7 ^( c1 N2 N! d+ [/ i! |
androgenic stimulation from either endogenous or8 H. L2 q+ R( X# t% ~, X: N
exogenous sources, nonpituitary gonadotropin stim-2 n' C& c/ g" H; W6 B( O+ M1 `5 G) j
ulation, and rare activating mutations.3 Virilizing M1 U! n9 i+ y ~. {
congenital adrenal hyperplasia producing excessive+ A8 m9 E4 r, S. Y
adrenal androgens is a common cause of precocious' e; @% m4 k/ Q) e+ u
puberty in boys.3,4% D" \9 V; L& D
The most common form of congenital adrenal
& | M5 H- I% I$ l4 l2 Khyperplasia is the 21-hydroxylase enzyme deficiency.$ N6 `7 J' Z5 s6 Q. x& a8 P% O
The 11-β hydroxylase deficiency may also result in( u L% L& D' A3 P' V) S( n" @
excessive adrenal androgen production, and rarely,
4 E( g) D4 q5 f! i! ]: @1 j* Jan adrenal tumor may also cause adrenal androgen
; j3 u: u! n9 O9 k& ]. z' v5 ]) s4 Texcess.1,35 }9 S; p7 H3 w" M
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
& }8 r0 [% q5 x/ F542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
8 h# m8 Q0 j* }4 W9 V( A' Q( _5 nA unique entity of male-limited gonadotropin-6 s. b; w% X- N' d
independent precocious puberty, which is also known
- c, o9 {! a0 [( V* f! H& Nas testotoxicosis, may cause precocious puberty at a
2 O' d5 T2 @0 G. A+ h+ dvery young age. The physical findings in these boys
; F4 W+ u& M/ L6 x& Z0 l, X; _with this disorder are full pubertal development,% X, g# I% b) _& l
including bilateral testicular growth, similar to boys
. M s4 e; _6 L4 x; F7 a) Y- u0 e. H4 mwith CPP. The gonadotropin levels in this disorder
2 k- T# A( e8 b) x2 vare suppressed to prepubertal levels and do not show
5 k( I& m* V5 `3 g: i" `' npubertal response of gonadotropin after gonadotropin-
& c/ c/ k+ e9 G6 a0 h q6 Ureleasing hormone stimulation. This is a sex-linked
! D$ ]1 e- h* E! H1 v4 \autosomal dominant disorder that affects only% c& ~8 Y3 b g1 p% S: J2 y
males; therefore, other male members of the family
# t/ L. _. M& g6 s) M4 r1 w- Z' Kmay have similar precocious puberty.3/ ~ K1 ^. i, A$ `. C0 i
In our patient, physical examination was incon-, D/ e4 \# t4 @# _+ u* C
sistent with true precocious puberty since his testi-3 q4 t8 j) f' U, z
cles were prepubertal in size. However, testotoxicosis. ] _3 D& Y% A
was in the differential diagnosis because his father# M$ h% a( S2 g8 T1 I) L
started puberty somewhat early, and occasionally,! z, S( @+ l+ I6 `- w9 e$ a# b
testicular enlargement is not that evident in the
7 Y6 V" p# ~" j' b3 x; F% g" [beginning of this process.1 In the absence of a neg-
5 e4 w, k" _3 B; ?4 F/ m) native initial history of androgen exposure, our6 F4 Q0 T N" J/ d
biggest concern was virilizing adrenal hyperplasia,
; D: N2 X& L4 M& O0 k6 _either 21-hydroxylase deficiency or 11-β hydroxylase+ [. e" c) C _$ L0 r: B' E- j+ G
deficiency. Those diagnoses were excluded by find-
/ F# v1 N% n |% Iing the normal level of adrenal steroids.
) Q9 i- {. Q" q) O8 EThe diagnosis of exogenous androgens was strongly
- o* r1 L; |4 I) Xsuspected in a follow-up visit after 4 months because
# f6 i- ~. _7 ~* r) nthe physical examination revealed the complete disap-5 V! v1 v! C& X" x& C2 L* Z9 ]1 M
pearance of pubic hair, normal growth velocity, and# e, ]5 v) b9 [. k
decreased erections. The father admitted using a testos-
4 Y4 P- W( K1 U z' _terone gel, which he concealed at first visit. He was; ]% h1 B. G2 D5 l8 Z1 {
using it rather frequently, twice a day. The Physicians’# \- [- u* x6 J/ f7 O6 B# c
Desk Reference, or package insert of this product, gel or
- M: h6 h' y/ W: W' X# l7 W% i. Acream, cautions about dermal testosterone transfer to
& O- d n: \6 }" ~' _# xunprotected females through direct skin exposure.
' w1 r* ^$ P: ~% E4 tSerum testosterone level was found to be 2 times the
J! R# N4 L4 Dbaseline value in those females who were exposed to
0 r, u9 K- n* ^# xeven 15 minutes of direct skin contact with their male5 \. r" ]% p& h9 L
partners.6 However, when a shirt covered the applica-
8 q: X4 ]7 I( Ytion site, this testosterone transfer was prevented.9 I* O: o0 H8 @! q
Our patient’s testosterone level was 60 ng/mL,
( H$ h. @3 v) T4 o$ qwhich was clearly high. Some studies suggest that
8 K7 x$ L4 B9 ~9 Z! Z y* ]dermal conversion of testosterone to dihydrotestos-7 z8 T: J& \0 \7 @
terone, which is a more potent metabolite, is more/ Z$ V- N" h1 i6 F
active in young children exposed to testosterone9 F5 Y8 j% \/ G
exogenously7; however, we did not measure a dihy-, |+ _. {5 s' Y: x0 S# r& `+ V
drotestosterone level in our patient. In addition to+ f" f1 j2 `: ~$ O9 N/ G- c9 H
virilization, exposure to exogenous testosterone in7 S L+ B) _2 w+ H" v
children results in an increase in growth velocity and: j. b& H# o* X& C3 Q* j1 b3 M
advanced bone age, as seen in our patient.
$ N- S) [$ D1 M4 T- {The long-term effect of androgen exposure during
; I# T( P3 h* t" i: ]early childhood on pubertal development and final
* ^! o) i* X/ I8 Y- Ladult height are not fully known and always remain2 f7 M9 H* n9 K \( a% F8 {: m
a concern. Children treated with short-term testos- Y1 [5 p3 s0 ^3 Z$ Q) L* z
terone injection or topical androgen may exhibit some
q( n4 c; _( p- g( ^acceleration of the skeletal maturation; however, after
& k- I- j& q2 |cessation of treatment, the rate of bone maturation8 |% X" W2 m" c# f+ q! ^- p: t
decelerates and gradually returns to normal.8,9
5 ]/ p0 b& h- z- t/ S' ?There are conflicting reports and controversy* v) y1 u. r. s! G5 V$ Q
over the effect of early androgen exposure on adult
. K" j O+ V1 ^- o. zpenile length.10,11 Some reports suggest subnormal
; r9 l" m% f8 {1 [$ G3 E- Wadult penile length, apparently because of downreg-
, c! ?% X6 D) q& Xulation of androgen receptor number.10,12 However,, d$ ~3 o. Z5 B" F1 h
Sutherland et al13 did not find a correlation between
9 x3 g- A, ^5 q" \childhood testosterone exposure and reduced adult
. ~; k) P' d _, p- J1 A0 s% Zpenile length in clinical studies.) D+ K" ^3 e! W* w6 |! r0 H
Nonetheless, we do not believe our patient is7 I& u; \: @3 E2 E
going to experience any of the untoward effects from& u8 g4 ?: j0 M1 ~3 N& J! z
testosterone exposure as mentioned earlier because& ^% L2 I2 C1 w. U8 R
the exposure was not for a prolonged period of time.
. i5 U9 J1 v$ ]8 A3 i" o5 L# L. uAlthough the bone age was advanced at the time of
! r& i1 o) p- I4 R2 sdiagnosis, the child had a normal growth velocity at
4 g$ p- ^9 |$ o6 N) U$ lthe follow-up visit. It is hoped that his final adult# \2 X( I0 @8 a) B9 Q
height will not be affected.6 |4 _) j7 W- U( s4 q5 D" n
Although rarely reported, the widespread avail-
2 J! Z, Z( q" P0 V; \ability of androgen products in our society may
, j: A7 H t7 n" o/ o% bindeed cause more virilization in male or female `$ x0 r5 {2 F) Z
children than one would realize. Exposure to andro-
- K0 U0 f; E& p$ _gen products must be considered and specific ques-
- m8 {! @# _$ L" u/ B7 i3 Mtioning about the use of a testosterone product or$ q1 e, K2 G' x. ?
gel should be asked of the family members during
6 m6 ]* i3 Y& Vthe evaluation of any children who present with vir-4 N& t$ l+ _: L& z, O
ilization or peripheral precocious puberty. The diag-4 H) E- ]: S- c7 ^& u7 X7 T. H3 M
nosis can be established by just a few tests and by
, h0 r5 ^5 |* L+ G: eappropriate history. The inability to obtain such a
" R& f. g# k8 n7 nhistory, or failure to ask the specific questions, may4 A e( k q7 n1 d& G& |
result in extensive, unnecessary, and expensive
# D+ H: a. {% s v7 @5 yinvestigation. The primary care physician should be
/ z* w: a9 ` k3 O% Saware of this fact, because most of these children
# E' |' R* ?" e- ]+ r9 ]may initially present in their practice. The Physicians’
9 r& U2 e: N" [: JDesk Reference and package insert should also put a" U3 M6 H, K+ R ]( W# p+ L; f2 @
warning about the virilizing effect on a male or; @3 q0 L1 D) Z) G' |
female child who might come in contact with some-
- Q L; W/ `+ Y) a; d# qone using any of these products.
: L/ A6 N: t! j! z4 w TReferences
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
/ ^# J8 A1 L# ~" R" ~# Q) Q2002: 565-628.
2 C% Z$ d% U/ y9 R" z/ x2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
2 k2 |. Q6 T1 n+ C' }puberty in children with tumours of the suprasellar pineal5 Y' u; O0 X6 t9 n2 N9 ?
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* F) A; Z1 X; i+ h( R* _3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
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Dekker Inc; 2003:211-238.
' a; c# C( g6 z% T; R7 T4 V4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
( E {* \* _ J, U( Q/ Wdevelopment in a two-year-old boy induced by topical
0 g; }$ b3 R% `+ @: p' Bexposure to testosterone. Pediatrics. 1999;104:e23.
& ]' o @" R% O! n! k! ]2 l( H5. Greulich WW, Pyle SI, eds. Radiographic Atlas of+ j$ I# ?3 V" x0 y& J
Skeletal Development of the Hand and Wrist. 2nd ed.
7 r! K O2 k8 _1 H5 x B7 r0 QStanford, CA: Stanford University Press; 1959.
2 Y. X8 G7 F% r( T0 H+ U# k, L6. Physicians’ Desk Reference. Androgel 1% testosterone,: D# p* E j4 h7 I4 j
Unimed Pharmaceutical Inc. Montvale, NJ: Medical2 Q2 X+ ~" z, n# {) C- z7 C( \% {; p
Economics Company, Inc; 2004:3239-3241.
3 X: z+ s+ D# k4 C# W$ a7. Klugo RC, Cerny JC. Response of micropenis to topical( W; v/ X* k- {
testosterone and gonadotropin. J Urol. 1978;119:6 t- d: [4 C/ Z: X* E
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