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is a significant concern for physicians. Central2 ]- d' Y5 F3 b6 Z l+ @4 Q
precocious puberty (CPP), which is mediated
7 p. }% F0 o @+ Pthrough the hypothalamic pituitary gonadal axis, has$ @) W6 L8 I# c/ a" k- R
a higher incidence of organic central nervous system
7 ]# a# e: w) n/ H% @3 Jlesions in boys.1,2 Virilization in boys, as manifested5 `: I% Q( C2 E0 d$ A" |, A
by enlargement of the penis, development of pubic
; o- ~8 ^: Q- D- z1 W. Zhair, and facial acne without enlargement of testi-, g; f5 x. Z; E) O: F
cles, suggests peripheral or pseudopuberty.1-3 We
! B$ @0 o: Z* l9 i' ?report a 16-month-old boy who presented with the
! L6 }$ H; p* j: Q6 [0 ?enlargement of the phallus and pubic hair develop-
" \( F( M1 y, C( _ment without testicular enlargement, which was due
" ?; j8 r B% ^ @3 Q; t4 Lto the unintentional exposure to androgen gel used by
" r1 m$ _$ d2 X! H' U4 @+ y8 W1 othe father. The family initially concealed this infor-
. m1 k5 e2 p$ z' A! v) _mation, resulting in an extensive work-up for this$ b+ i& y* `1 V' h
child. Given the widespread and easy availability of
6 M5 H6 Z1 S# Q0 ftestosterone gel and cream, we believe this is proba-) O2 Q( ^# P/ S& V7 |/ {3 T
bly more common than the rare case report in the6 R8 ?) }4 _+ v x' t
literature.4# G' z6 Z& x. x- b3 ^5 ^6 c
Patient Report0 u1 w2 w$ r2 O! q2 t4 C
A 16-month-old white child was referred to the
8 d6 s. z) P# ^2 U0 Z, o1 Jendocrine clinic by his pediatrician with the concern# s* L! b5 V% u9 @& a
of early sexual development. His mother noticed
1 Z6 t4 B, z' h/ |6 ?, _* Jlight colored pubic hair development when he was. _; n6 V3 p* K/ L' }$ _
From the 1Division of Pediatric Endocrinology, 2University of2 [% K2 m" p+ y
South Alabama Medical Center, Mobile, Alabama.7 m3 B0 G$ r" I, ]9 h
Address correspondence to: Samar K. Bhowmick, MD, FACE,8 h' a( k/ c5 D7 K$ }! v6 r7 C
Professor of Pediatrics, University of South Alabama, College of5 W- c, V: a7 Q5 y9 d
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
; P+ j7 j9 L5 V. ]) c6 T( qe-mail: [email protected].
7 q$ W* {7 P' ?$ |! l4 H1 yabout 6 to 7 months old, which progressively became; o" R* @6 i0 z; O% R% c5 t( Y
darker. She was also concerned about the enlarge-4 H4 }+ Z. C: X2 v
ment of his penis and frequent erections. The child% }5 M1 ]; I1 b9 m
was the product of a full-term normal delivery, with
) e* v0 S3 {0 O" M |, N0 Sa birth weight of 7 lb 14 oz, and birth length of
" \! h2 F, J2 J% X; Y20 inches. He was breast-fed throughout the first year3 O. z3 g0 p7 S* c$ d( C: `
of life and was still receiving breast milk along with$ v. x, ~; a: x% Y. y, c% `# c) C# Z
solid food. He had no hospitalizations or surgery,
" B/ e7 R) h( J! Yand his psychosocial and psychomotor development( B# L" p* I# |0 M
was age appropriate.
7 G* x5 [) e/ ZThe family history was remarkable for the father,
( U1 ?+ _7 [, P6 B: f @6 ~who was diagnosed with hypothyroidism at age 16,
% }/ s! ?' I% g: n: K. Xwhich was treated with thyroxine. The father’s, N9 f* L. B7 W' J* }0 l
height was 6 feet, and he went through a somewhat
1 ~% J4 c3 h( i6 {6 xearly puberty and had stopped growing by age 14.: r( i% o" Y4 h
The father denied taking any other medication. The
+ k: c6 R& j' Q: _" j/ o" c3 a! Cchild’s mother was in good health. Her menarche9 {- ]# \3 m$ ~$ N8 K+ I# w3 @
was at 11 years of age, and her height was at 5 feet: i, l" a4 G& [2 R
5 inches. There was no other family history of pre-0 c# R0 I/ r3 N( m+ j
cocious sexual development in the first-degree rela-
8 L- D( H' s' J- ~. r Atives. There were no siblings.
1 W c/ f6 ?! Y4 HPhysical Examination% b: O# M& ], F
The physical examination revealed a very active,
+ O. z4 P& B B( R8 ^6 Gplayful, and healthy boy. The vital signs documented0 q0 {/ P! K- p: \$ @2 y. R# [) Z. k
a blood pressure of 85/50 mm Hg, his length was
" [* @ [( C- B8 v7 P7 E90 cm (>97th percentile), and his weight was 14.4 kg
% G' R4 Q3 E- N: g: l" E9 \(also >97th percentile). The observed yearly growth/ ^' L3 ?/ G0 W, t9 G2 U
velocity was 30 cm (12 inches). The examination of* G0 v( n+ C: ?6 T/ `) H
the neck revealed no thyroid enlargement.
" {6 X2 y7 _* R1 L! s9 _8 BThe genitourinary examination was remarkable for
$ o7 F# J" X* D8 ~- B+ p7 Lenlargement of the penis, with a stretched length of
! C5 V6 L7 n. l8 A8 cm and a width of 2 cm. The glans penis was very well
6 `/ O/ T: M, H; T/ Mdeveloped. The pubic hair was Tanner II, mostly around
( t1 e, a5 B; S* s5404 I) V- R0 G+ b) _8 C3 x
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% _2 f v; H1 f
the base of the phallus and was dark and curled. The
; N& E" [. B- D' S& x$ _testicular volume was prepubertal at 2 mL each.
2 s) q& s. Z: @The skin was moist and smooth and somewhat
$ z0 F4 Q/ m( l- soily. No axillary hair was noted. There were no5 w9 h. |1 u8 B
abnormal skin pigmentations or café-au-lait spots.
# `& V4 @: W% pNeurologic evaluation showed deep tendon reflex 2+2 f6 t" S' b: n. ]2 [9 T
bilateral and symmetrical. There was no suggestion
! E0 V. Z$ e4 c/ m2 _/ _of papilledema.# t% {& x' y* d
Laboratory Evaluation
1 k; V% t, q* U! P7 nThe bone age was consistent with 28 months by8 t! R" y6 g0 `! s4 U; Q3 ]: ?
using the standard of Greulich and Pyle at a chrono-
9 y8 W- ~& }$ G, q" o& Blogic age of 16 months (advanced).5 Chromosomal; Y. ^. u" l- w- Y; n6 |
karyotype was 46XY. The thyroid function test
7 r+ |6 j( R7 U3 Z" Zshowed a free T4 of 1.69 ng/dL, and thyroid stimu-9 Z: Z' k* o$ O6 v- h( u- j. W: S
lating hormone level was 1.3 µIU/mL (both normal).
+ J9 G0 F0 b* O( }1 S* rThe concentrations of serum electrolytes, blood& p" l. T) \9 G7 r# D: Q
urea nitrogen, creatinine, and calcium all were; u Q1 t+ w l; e9 n
within normal range for his age. The concentration. G4 u8 g$ b- P3 B
of serum 17-hydroxyprogesterone was 16 ng/dL
" o+ e) Y8 {; _! K( g! I(normal, 3 to 90 ng/dL), androstenedione was 209 Y# L* a5 s( m3 w( \( C
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-; s5 x3 M' J4 }3 J: T1 x
terone was 38 ng/dL (normal, 50 to 760 ng/dL),. C" `8 X# E9 l
desoxycorticosterone was 4.3 ng/dL (normal, 7 to8 E( }* w& ^& t5 @/ X9 Z, K
49ng/dL), 11-desoxycortisol (specific compound S)
+ L: {/ g! S+ A% G. b, cwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-( {# |5 W t3 m
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total/ f6 o( X; T. r- i
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
. K/ y$ w4 r8 j5 \5 E3 y/ Gand β-human chorionic gonadotropin was less than7 g$ u9 |/ q+ p" M% ^% y
5 mIU/mL (normal <5 mIU/mL). Serum follicular' H' {) _6 J# r, u
stimulating hormone and leuteinizing hormone
' ?- _; s6 y7 P2 \3 t2 c. Y2 mconcentrations were less than 0.05 mIU/mL
4 ? B, c. Z- {3 n& n(prepubertal).
4 V/ f3 I2 Q- y+ P/ [# q+ R, [3 KThe parents were notified about the laboratory
/ r/ M6 j: Z7 U0 L: \results and were informed that all of the tests were
; a" C8 f/ ~; {& Q0 f# Nnormal except the testosterone level was high. The9 j4 z( R: N# i1 `% P u* ?& }, B
follow-up visit was arranged within a few weeks to9 k/ G# }' z$ S" o6 l% K. h
obtain testicular and abdominal sonograms; how-* J( @5 [$ g5 a
ever, the family did not return for 4 months." ~6 s* k# B6 M7 x. w8 ]% f9 i S
Physical examination at this time revealed that the* f; X4 |4 D3 ]" L$ {" ^
child had grown 2.5 cm in 4 months and had gained
+ E; t" Z- v4 Y" y5 ~0 K# u2 kg of weight. Physical examination remained
. W% Z: b7 J. H6 H( e/ [unchanged. Surprisingly, the pubic hair almost com-
% n8 A O* h7 ipletely disappeared except for a few vellous hairs at
0 R' `3 t5 a% f0 e6 H) ethe base of the phallus. Testicular volume was still 29 S! J4 h" m4 B+ [7 s, X
mL, and the size of the penis remained unchanged.+ E2 ^; Z; g5 ]' M- p
The mother also said that the boy was no longer hav-
# F4 |- {7 X c: ^! B& c2 k2 uing frequent erections.; F7 D" e) }/ c" A7 F, b& y
Both parents were again questioned about use of
8 B# ~4 h2 f. v$ B3 Y2 H: uany ointment/creams that they may have applied to$ V5 Y' S8 m/ j/ |- \' D
the child’s skin. This time the father admitted the
+ x: d1 K/ _! Q& F4 I3 JTopical Testosterone Exposure / Bhowmick et al 541 M/ V* Y: m* a f P
use of testosterone gel twice daily that he was apply-0 L6 K0 O4 \5 V& d
ing over his own shoulders, chest, and back area for) [0 m8 ^0 C$ b3 V
a year. The father also revealed he was embarrassed
8 a" L% B, I% lto disclose that he was using a testosterone gel pre-2 G+ J! X9 n1 @: d
scribed by his family physician for decreased libido4 r' {& K, `+ S& G
secondary to depression.
3 J5 m" u: B+ s! bThe child slept in the same bed with parents.; t8 K5 z( a9 t, S& e# ]2 o4 r% w
The father would hug the baby and hold him on his
' I3 V# p0 ^7 X! ]2 _, Pchest for a considerable period of time, causing sig-
5 G. |8 S6 r1 |, W! }; y5 ^% Knificant bare skin contact between baby and father.
B* g6 s4 j; D2 EThe father also admitted that after the phone call,' [8 O$ T4 h2 U; t# ]2 ]2 @
when he learned the testosterone level in the baby
% ?; ?6 ?, N% n. D; Lwas high, he then read the product information
# R) \4 @+ v' P6 ^ epacket and concluded that it was most likely the rea-2 y$ r. V a: a* u Q5 ?$ j# D/ P
son for the child’s virilization. At that time, they
# d: g+ X- s c( ]7 |decided to put the baby in a separate bed, and the$ a2 u3 S* j/ z- L3 e. y4 U
father was not hugging him with bare skin and had7 [# s+ j+ R( {. Q! o
been using protective clothing. A repeat testosterone
1 t! _" J! x* }8 `% }test was ordered, but the family did not go to the; Y0 i' a& W; T7 ?. Z" G! I
laboratory to obtain the test.
3 l! h, D4 h5 kDiscussion- ]5 S( D1 e! q
Precocious puberty in boys is defined as secondary3 S- L3 R- B2 l+ m' ]6 g7 S5 u
sexual development before 9 years of age.1,4 a# |" \- v. Z
Precocious puberty is termed as central (true) when/ s( J; `& C/ i* k2 N
it is caused by the premature activation of hypo-7 y7 B( ~2 i, @, }! x
thalamic pituitary gonadal axis. CPP is more com-" u2 H9 k9 i$ {
mon in girls than in boys.1,3 Most boys with CPP
3 `" ^$ m, G7 L& s& xmay have a central nervous system lesion that is1 c: q. L, f" ~. I
responsible for the early activation of the hypothal-
Q% M4 I9 T$ C$ h9 Aamic pituitary gonadal axis.1-3 Thus, greater empha-3 S) C/ d8 u8 n! _ z
sis has been given to neuroradiologic imaging in
2 W% N; Y5 G5 \" Kboys with precocious puberty. In addition to viril-
: k, H- W5 y+ y8 q1 Cization, the clinical hallmark of CPP is the symmet-1 x/ u" g" B4 a/ a a1 Q
rical testicular growth secondary to stimulation by' `* U6 l! k1 l! `2 n
gonadotropins.1,3( c& ?* e1 e% ?9 t! }% e( U
Gonadotropin-independent peripheral preco-* D0 a+ M7 d4 s
cious puberty in boys also results from inappropriate0 _+ g/ g3 U& ^" R4 @7 B; b U, o
androgenic stimulation from either endogenous or" V* P- g) ~5 |! e$ |/ ^# V
exogenous sources, nonpituitary gonadotropin stim-1 L7 y: c' P/ L7 `, {
ulation, and rare activating mutations.3 Virilizing
$ O2 k% t0 r- h% \& Jcongenital adrenal hyperplasia producing excessive
7 G9 H4 F0 d+ S. nadrenal androgens is a common cause of precocious/ V, C2 a& }6 Y1 ~3 Y1 o7 a
puberty in boys.3,4: q; O* v9 n# L( q- N
The most common form of congenital adrenal
; D" x) J! w" m1 P* W" dhyperplasia is the 21-hydroxylase enzyme deficiency.# S5 H1 a7 O6 A. m5 i
The 11-β hydroxylase deficiency may also result in* ?! n; U: N( O% P' S+ o8 E
excessive adrenal androgen production, and rarely,8 M2 _2 S6 @+ F4 U! _2 U+ m
an adrenal tumor may also cause adrenal androgen
* H, k2 j$ A5 l; k1 A$ J* |& qexcess.1,3
* _* H+ v3 q& u' xat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% Q" N9 V2 X% B$ }5 S: r8 \8 A* t
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007" N5 S& e5 }! J9 Z3 Z3 T. v% L' x
A unique entity of male-limited gonadotropin-1 j, f; \* a" z/ j8 _0 n
independent precocious puberty, which is also known( X% s3 a1 Y/ P3 A6 i
as testotoxicosis, may cause precocious puberty at a
. y) |+ P+ U* Svery young age. The physical findings in these boys
2 c+ e% G9 a/ L* s" V5 kwith this disorder are full pubertal development,0 f$ H3 j9 [: E9 `4 V; w' A6 D |+ {
including bilateral testicular growth, similar to boys' L5 B, T5 E1 r- U' X
with CPP. The gonadotropin levels in this disorder
B1 }( [# S! T7 z% ware suppressed to prepubertal levels and do not show: \* x* w) [. X! P4 q
pubertal response of gonadotropin after gonadotropin- w) u- N& s' i0 T, Y: n! K; \ U
releasing hormone stimulation. This is a sex-linked
' W6 v) ~% i/ q5 Wautosomal dominant disorder that affects only
5 x5 F2 v7 u) l- hmales; therefore, other male members of the family8 d9 Q: V- V/ s3 b$ `0 X
may have similar precocious puberty.3! x+ j, Q/ r8 u+ Y
In our patient, physical examination was incon-
- D9 f& ^# F- l4 _# l2 psistent with true precocious puberty since his testi-
) Z7 w% Z$ n' W K5 p, G( y( A* D" jcles were prepubertal in size. However, testotoxicosis" i4 s) K8 ]: E' H- N; Q
was in the differential diagnosis because his father
+ l, r0 y" h) v. n8 N1 c, {/ Gstarted puberty somewhat early, and occasionally,% ~8 g9 p( h8 F- F
testicular enlargement is not that evident in the' Y" K: K6 F6 O5 \* W/ _9 S7 A: u& P
beginning of this process.1 In the absence of a neg-, ^3 ^0 c( q G2 |
ative initial history of androgen exposure, our
. A/ d: Y1 U8 B* n& q$ lbiggest concern was virilizing adrenal hyperplasia,. @4 W; U+ Z2 M
either 21-hydroxylase deficiency or 11-β hydroxylase
) W/ y$ ?7 c4 y8 r% Y# Kdeficiency. Those diagnoses were excluded by find-* b; `* e& s9 J2 i
ing the normal level of adrenal steroids.$ |' i: h! z1 v. X3 e' S3 a4 }5 C
The diagnosis of exogenous androgens was strongly
+ X) r; [( }" K: nsuspected in a follow-up visit after 4 months because
! P2 k, x- N9 s) ?# u! vthe physical examination revealed the complete disap-$ W- w. j# I3 D3 h; r/ Z' o
pearance of pubic hair, normal growth velocity, and
9 h) L. ~3 U3 G7 i8 Tdecreased erections. The father admitted using a testos-5 G* v5 ?( D t1 P% ]% h. \. b- b" M
terone gel, which he concealed at first visit. He was" V+ V- s3 ~+ s2 B# ?
using it rather frequently, twice a day. The Physicians’8 t$ U# o! s4 y- r. e
Desk Reference, or package insert of this product, gel or0 M4 M! G1 H R4 Q* t% @8 a) B9 I
cream, cautions about dermal testosterone transfer to8 P: S& |) e# c g; b) I
unprotected females through direct skin exposure.
9 r- d# `: l2 `Serum testosterone level was found to be 2 times the: r* W/ b' b0 z' \) G; @: B
baseline value in those females who were exposed to5 T5 v3 G. f6 h; Y/ z
even 15 minutes of direct skin contact with their male% j4 |9 B- s6 B, H2 l5 h
partners.6 However, when a shirt covered the applica-
$ p8 s/ d( Y9 Ution site, this testosterone transfer was prevented.
" ^& o! V% K$ _Our patient’s testosterone level was 60 ng/mL,
) U. C5 E6 C$ H iwhich was clearly high. Some studies suggest that
' Z# p0 \6 f" x) G8 B+ W+ ]dermal conversion of testosterone to dihydrotestos-
; ~/ ?+ D; D0 x* U/ |terone, which is a more potent metabolite, is more
( ~8 P ]) c& `3 z. V& h# U' Iactive in young children exposed to testosterone' h. }# {2 X* g0 h( V
exogenously7; however, we did not measure a dihy-# R2 c+ k; M2 _$ l2 I8 q H
drotestosterone level in our patient. In addition to0 t: ^/ E) d5 e* @4 [5 ^, a
virilization, exposure to exogenous testosterone in- H) Z8 E9 P. w- H+ H h5 i
children results in an increase in growth velocity and
$ J& a, m1 B- f. d1 y% ?- Fadvanced bone age, as seen in our patient.$ o8 Q2 j# x# d9 B. v
The long-term effect of androgen exposure during, H# u2 f& a% j+ c5 x
early childhood on pubertal development and final# }3 s( a6 S/ t
adult height are not fully known and always remain1 {# o+ t& g2 K+ ^ j4 K
a concern. Children treated with short-term testos-
% j- T: [4 b1 U. Rterone injection or topical androgen may exhibit some+ ]& w& `% W- \0 m; i
acceleration of the skeletal maturation; however, after
; B0 V1 Y% H3 b* n1 zcessation of treatment, the rate of bone maturation
" L* N- M8 P ? jdecelerates and gradually returns to normal.8,9
5 Y0 I: X' v' D$ r9 A8 nThere are conflicting reports and controversy
@7 b) e% {. H5 t$ f4 wover the effect of early androgen exposure on adult
$ i& R7 F* m- A, p, @. m7 i q* ]penile length.10,11 Some reports suggest subnormal9 X) N/ k# w1 d3 n/ m' Q7 h: u
adult penile length, apparently because of downreg-" s! A1 ]& n2 k
ulation of androgen receptor number.10,12 However,( c# W1 {3 B2 b' B+ J$ k
Sutherland et al13 did not find a correlation between: k" F: Z/ s9 D0 M& s D7 i
childhood testosterone exposure and reduced adult
% ^5 d) B4 f9 b ^; }7 Upenile length in clinical studies.2 y; Q" Y! |2 g5 f/ |
Nonetheless, we do not believe our patient is7 T: C2 y8 X. [1 y% p
going to experience any of the untoward effects from
7 [ B2 {" r/ itestosterone exposure as mentioned earlier because7 S& \" \3 y+ A7 @4 ^2 s/ o
the exposure was not for a prolonged period of time.
* b, A) S: _& u m0 X0 ~Although the bone age was advanced at the time of
. h, k" W% V1 P2 M+ F% H2 Vdiagnosis, the child had a normal growth velocity at
4 U: s; [, q5 A5 B. r8 Ithe follow-up visit. It is hoped that his final adult- y( w# w8 Y( s, C
height will not be affected.
3 @+ U$ \- a+ h6 |) MAlthough rarely reported, the widespread avail-4 b* l6 V; [- Z* X* I& Q( F1 d
ability of androgen products in our society may9 t2 P' [/ W* X
indeed cause more virilization in male or female& R# S: q, X1 C) `
children than one would realize. Exposure to andro-
6 i8 K9 b% I' v! x7 Bgen products must be considered and specific ques-
" ]( {% _. ~! [4 H1 d; u5 rtioning about the use of a testosterone product or
4 m1 E& T0 q S8 |, [* ], b3 hgel should be asked of the family members during
: b9 b1 _6 X$ W$ x# `8 e0 hthe evaluation of any children who present with vir-
. u p! W0 V% @1 u3 U( V9 oilization or peripheral precocious puberty. The diag-8 j7 r* l; d$ W" l1 g9 a
nosis can be established by just a few tests and by
5 i8 d W% f0 m Vappropriate history. The inability to obtain such a
% I% U' B2 m/ V% B. ?3 M4 X+ Z& Thistory, or failure to ask the specific questions, may- C* |8 @) F4 {7 \4 r$ Y' t* B
result in extensive, unnecessary, and expensive4 q* `) u3 F0 J1 B* V& R' V
investigation. The primary care physician should be
2 i- ]6 g$ _7 ?: A; ^! } o4 c5 ]0 qaware of this fact, because most of these children
+ D. X- b/ o: f: |, P) ]1 D$ Q. bmay initially present in their practice. The Physicians’
. h" c0 z P8 K- S. u' i- zDesk Reference and package insert should also put a) s& m+ p3 I+ g3 ]
warning about the virilizing effect on a male or8 Z7 h; R8 H1 y$ e- Z+ a4 b
female child who might come in contact with some-
+ W3 e' S0 z: G! _7 vone using any of these products.1 U2 T3 o4 I- F3 A0 \
References
# B. t7 [; U: @: d" b1. Styne DM. The testes: disorder of sexual differentiation; r! B: ^ \3 O( z
and puberty in the male. In: Sperling MA, ed. Pediatric' i% h8 \7 b- R: Q* N
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
; f0 [1 M5 I! L# n1 f, U9 k2002: 565-628.: h+ H2 [3 A a: _
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
1 K4 P6 V; f, @puberty in children with tumours of the suprasellar pineal
/ |0 c7 M( b9 Cat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from! g8 T: x8 I% A
Topical Testosterone Exposure / Bhowmick et al 5437 d( y; d4 n7 ^* u- H7 D
areas: organic central precocious puberty. Acta Paediatr.
, g4 A) L& Q. {1 o! X2001;90:751-756.! _! X9 z$ @9 B* y5 b
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.: ]" Y( C( J$ Q/ f5 x3 M$ ?
Pediatric Endocrinology. 4th ed. New York, NY: Marcel+ f7 }% K( n9 U( S$ x: {
Dekker Inc; 2003:211-238.- h- [9 q( d; i z8 G7 c. d
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
9 R; e# Q/ y/ E, Vdevelopment in a two-year-old boy induced by topical
) ?/ M! t( t/ {7 vexposure to testosterone. Pediatrics. 1999;104:e23.
" T3 L5 v6 B- ^4 K, a' M/ s6 l5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
& X H' c. w" }2 E* o" g9 ]" zSkeletal Development of the Hand and Wrist. 2nd ed." e# u& ?- R% f+ X" A1 t5 r& o
Stanford, CA: Stanford University Press; 1959.$ z- a$ p' B; z9 L' p
6. Physicians’ Desk Reference. Androgel 1% testosterone,* k* G' R* z6 E
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
) w: O& e4 N$ |9 j$ K& Y+ [Economics Company, Inc; 2004:3239-3241.
$ p3 G! e- R/ A0 a( Z" n7. Klugo RC, Cerny JC. Response of micropenis to topical" C0 e/ Z4 ]% ]% M! h! f" J
testosterone and gonadotropin. J Urol. 1978;119:$ _! S/ X8 p% A6 R
667-668.* v% C( R' H0 p6 H* Z7 x6 E7 v
8. Guthrie RD, Smith DW, Graham CB. Testosterone# s' r$ L( B5 W$ c' R" a9 Q! Q0 I
treatment for micropenis during early childhood. J Pediatr.
# t; `1 |. `, q/ C5 t, e1973;83:247-252.
! O4 U e* J; x" }9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone7 |7 Z( y/ N! z, |& @
therapy for penile growth. Urol. 1975;6:708-710.
8 P$ j# N# I$ d, t9 C) l m0 l10. Husmann DA, Cain MP. Microphallus: eventual phallic. P( p4 Q; p" G
size is dependent on the timing of androgen administra-' W% j+ _4 c$ \+ O
tion. J Urol. 1994;152:734-739.9 r3 {/ p' l0 @9 X8 s
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
, K# `- u* u5 Zdoes early treatment with testosterone do more harm
! a( Z# ?- ~! j" j1 G, Lthan good? J Urol. 1995;154:825-829.; ` ]& @. E. j2 i& c. }& x
12. Takane KK, George FW, Wilson JD. Androgen receptor
* o* [) {$ w b0 rof rat penis is down-regulated by androgen. Am J Physiol.
7 Z$ _% j3 A% W8 s7 S1 r& ^1990;258:E46-E50., d M3 f; G, R0 z% q+ L
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect! |/ E- o3 n# b# S; N( h
of prepubertal androgen exposure on adult penile9 D: E. v) @" e+ {; y# l
length. J Urol. 1996;156:783-787. |
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