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is a significant concern for physicians. Central
5 H4 X8 ]7 J7 r. C% Y6 dprecocious puberty (CPP), which is mediated
5 {' X! I" l, b& w) Ythrough the hypothalamic pituitary gonadal axis, has
# x7 g( ]* ^0 H: F# xa higher incidence of organic central nervous system* j. l6 E$ Y8 E. u7 ~9 R- V
lesions in boys.1,2 Virilization in boys, as manifested
2 |. l# @. X+ q ?7 rby enlargement of the penis, development of pubic
: N$ v" u* F! ~! u3 j$ hhair, and facial acne without enlargement of testi-* Q0 A- w3 s2 q5 b& f# }
cles, suggests peripheral or pseudopuberty.1-3 We& k5 Z& \6 |' a1 C) u4 Z) {
report a 16-month-old boy who presented with the) {1 k4 W+ y7 v K0 W! D
enlargement of the phallus and pubic hair develop-- t( x$ b# s+ q7 w2 C
ment without testicular enlargement, which was due
% [2 O1 U' Q* v7 J N$ Eto the unintentional exposure to androgen gel used by% s8 c( e7 |! x5 X
the father. The family initially concealed this infor-
/ Q) D& l; A4 Y+ S% emation, resulting in an extensive work-up for this
' t" f9 D: `! y( ichild. Given the widespread and easy availability of
- r. S! I. P& t6 utestosterone gel and cream, we believe this is proba-
6 w" E: z7 V0 _5 cbly more common than the rare case report in the7 Q* D0 j* K& Z0 g
literature.4% C ~" G- B* y8 ]& ?. _
Patient Report) Y& |2 v0 O6 H! W+ d! a
A 16-month-old white child was referred to the6 x2 X( V+ A/ t% H+ P6 r0 ]
endocrine clinic by his pediatrician with the concern1 M& m" b+ W7 _4 C" b8 Y" g* U6 O) o
of early sexual development. His mother noticed# j* d) Q! K, M& P( F9 P0 U
light colored pubic hair development when he was
! s. |+ e4 E" _% w; i% sFrom the 1Division of Pediatric Endocrinology, 2University of
. n) g+ X5 C; k- z: f- {& pSouth Alabama Medical Center, Mobile, Alabama.* u. {( P7 O$ j3 D# K$ [1 s
Address correspondence to: Samar K. Bhowmick, MD, FACE,
k8 `0 z+ F7 r- d8 PProfessor of Pediatrics, University of South Alabama, College of
* u% m& q& M3 LMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;, I# e( r3 n3 s8 ]! J
e-mail: [email protected].
1 M7 T- n+ K' Q: I- wabout 6 to 7 months old, which progressively became
( o1 I' j: Y0 g) c/ ~$ S& B; n) [darker. She was also concerned about the enlarge-
( X9 U: G( N& zment of his penis and frequent erections. The child
- ^' P( \5 l% a& b( cwas the product of a full-term normal delivery, with
9 ]& U" K B) U, pa birth weight of 7 lb 14 oz, and birth length of
8 f" l4 o7 X4 ^0 E20 inches. He was breast-fed throughout the first year
8 s$ i2 u0 l8 Zof life and was still receiving breast milk along with
: X* m @0 g. t* a3 R: Jsolid food. He had no hospitalizations or surgery,
' y* ~) x9 f* ~: Yand his psychosocial and psychomotor development
% m, {3 ~' `1 K/ vwas age appropriate.
# j6 K2 f# t5 k: M& g8 NThe family history was remarkable for the father,2 h. n. s$ U& M( L0 S
who was diagnosed with hypothyroidism at age 16,
0 s( s4 i! W6 ]6 d4 C' h0 A% }which was treated with thyroxine. The father’s
! B2 [/ p9 y! r9 b z5 z5 ?height was 6 feet, and he went through a somewhat6 \2 s3 K6 E8 A, s1 Q, J- m
early puberty and had stopped growing by age 14.
# l+ N: ?" k3 L& o5 _ mThe father denied taking any other medication. The
8 E% F( l2 M, H$ R( `8 Z) B pchild’s mother was in good health. Her menarche9 \4 M+ [$ C5 t2 R" `6 q4 ~2 ~
was at 11 years of age, and her height was at 5 feet
, q; `# m, ?. b% G5 inches. There was no other family history of pre- q# d' {( L6 G- i2 J# y
cocious sexual development in the first-degree rela-) o; X- j: O, h- j" y) Y
tives. There were no siblings.1 ~" c+ ^9 S! K, L' `) [" ?6 h0 r
Physical Examination
; f' v0 a* R, S* _The physical examination revealed a very active,
8 w0 g3 G9 `/ N _+ k2 Z2 F8 d; Mplayful, and healthy boy. The vital signs documented9 n8 X0 r+ L0 q; x
a blood pressure of 85/50 mm Hg, his length was% q) m7 j# ]% J1 u8 ~: y
90 cm (>97th percentile), and his weight was 14.4 kg
8 Y/ ~' K; u$ j/ j(also >97th percentile). The observed yearly growth6 h& j5 ^9 R" [% L5 X7 v: {3 H
velocity was 30 cm (12 inches). The examination of
Z. o3 w" o1 {# {6 tthe neck revealed no thyroid enlargement.
- t7 y: H+ f4 z) p1 c0 QThe genitourinary examination was remarkable for- |9 `+ m5 K+ N7 N
enlargement of the penis, with a stretched length of3 A+ U- p3 v. x( u5 g
8 cm and a width of 2 cm. The glans penis was very well( B$ ]+ z9 [% m6 Y2 r1 N$ a1 l1 G
developed. The pubic hair was Tanner II, mostly around$ V9 {1 x6 F/ A R2 g* b) H: N1 i
540- W- }; U5 O8 r5 p
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from& [+ U+ H) P/ `: f6 K) ^" l
the base of the phallus and was dark and curled. The9 u" d" r/ [5 o& }
testicular volume was prepubertal at 2 mL each.
- G* I& F5 N5 S1 UThe skin was moist and smooth and somewhat
$ r! E+ r; ]: |3 Joily. No axillary hair was noted. There were no: w1 Q( |0 {$ o, u* @
abnormal skin pigmentations or café-au-lait spots.
: m( D* ]( a& G0 ~( w) }) {Neurologic evaluation showed deep tendon reflex 2+; J' Z. R/ x; y3 M9 s
bilateral and symmetrical. There was no suggestion4 @0 M' D6 W! ~
of papilledema.
$ y7 s% x: A9 F4 qLaboratory Evaluation
. [" m. H: S6 @' y9 R! l/ L/ _The bone age was consistent with 28 months by
% b" a5 D! P* {# xusing the standard of Greulich and Pyle at a chrono-: g6 W3 V4 v1 S1 {7 r+ R& I
logic age of 16 months (advanced).5 Chromosomal
Q8 j& ?# r8 m, skaryotype was 46XY. The thyroid function test
5 ^+ k& N( r$ R$ e" p3 nshowed a free T4 of 1.69 ng/dL, and thyroid stimu-* H2 \5 @' b+ c" {7 B6 H
lating hormone level was 1.3 µIU/mL (both normal).) Z6 h- N3 A; a, p9 {
The concentrations of serum electrolytes, blood
" n3 R7 Z* E! @urea nitrogen, creatinine, and calcium all were; t: j( z+ Z, J+ W5 q' m6 y( E5 ^
within normal range for his age. The concentration- `, _# x3 f( n7 r% `
of serum 17-hydroxyprogesterone was 16 ng/dL
( j; l7 N" J4 ], g# X; U(normal, 3 to 90 ng/dL), androstenedione was 20
& L; o, k: |6 g. W8 r$ g: eng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-" x7 M& m) h9 h. U& U
terone was 38 ng/dL (normal, 50 to 760 ng/dL),1 H% \6 C7 z. _& G9 z p7 n
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
! {/ y, C7 E5 {2 J) R) @49ng/dL), 11-desoxycortisol (specific compound S); [; o" v; F! {. d2 x0 m: @
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-+ {( m6 `7 W) l4 A: U4 l
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total' b+ D. E' H( @6 h. N Z- B
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
; ~ S x! S' O- z5 Dand β-human chorionic gonadotropin was less than
2 o* \- l6 _. S8 r5 mIU/mL (normal <5 mIU/mL). Serum follicular1 v8 L/ A5 g) a' _2 ^' M
stimulating hormone and leuteinizing hormone
5 v# o O* _2 d3 Q7 I( |concentrations were less than 0.05 mIU/mL
3 d# n" ~1 b; f8 b( ?(prepubertal).
3 r& g( N: x: X9 a% {+ n# _The parents were notified about the laboratory
6 I/ { a0 V$ z! Nresults and were informed that all of the tests were
_8 b) ~' k/ h$ `; r" hnormal except the testosterone level was high. The s8 c, g- Z8 }% M% s: m% n
follow-up visit was arranged within a few weeks to3 B( o/ x* W6 w) H7 o$ ?" e/ c
obtain testicular and abdominal sonograms; how-
5 u! `" J+ ~; D7 _" xever, the family did not return for 4 months.* F3 C8 Y% b0 k' a3 J) D I
Physical examination at this time revealed that the
0 T5 s9 R, h4 ]5 ~6 uchild had grown 2.5 cm in 4 months and had gained- Z, M" z+ X+ s+ W" _
2 kg of weight. Physical examination remained
+ B2 g2 W8 r. Punchanged. Surprisingly, the pubic hair almost com-
1 m( K$ u4 b5 Kpletely disappeared except for a few vellous hairs at
; b# a+ g( r/ c6 G/ I9 r! k1 m' othe base of the phallus. Testicular volume was still 2
3 c; S Y1 Y- | I2 Y. x, ?( @* A: OmL, and the size of the penis remained unchanged.
/ Q- c% J/ d5 XThe mother also said that the boy was no longer hav-; L# x3 n ]+ h" X
ing frequent erections.; B3 q# I! g' [0 L! X
Both parents were again questioned about use of
! }2 l4 I. S9 w' u! Hany ointment/creams that they may have applied to- n$ g" }- ^5 y f4 H; C" Y
the child’s skin. This time the father admitted the2 M9 j7 N7 B0 C, h
Topical Testosterone Exposure / Bhowmick et al 541) M. n& v* O2 v3 Y; J, d
use of testosterone gel twice daily that he was apply-
; E1 h4 F: v ~' B+ F& t) Ding over his own shoulders, chest, and back area for8 p5 V) n* w# T
a year. The father also revealed he was embarrassed7 n1 s4 Z8 V: @6 i% e4 z- P& H6 o; h
to disclose that he was using a testosterone gel pre-
" ^" O" e( W4 M( Escribed by his family physician for decreased libido
, k/ M0 ?. z- ?% r0 T, B# jsecondary to depression.( @4 }) c5 n4 h+ F* Y# _
The child slept in the same bed with parents.
; P+ l8 @/ D' W( OThe father would hug the baby and hold him on his$ @$ T: A+ D3 o6 {1 V% d3 {0 ]' K! X9 e
chest for a considerable period of time, causing sig-6 H% H1 d( N8 G1 J8 Z. w
nificant bare skin contact between baby and father.
& N0 _5 [$ ]+ Y3 b) G" ~- f+ u9 ?The father also admitted that after the phone call,
& F" v2 v9 W3 hwhen he learned the testosterone level in the baby
7 I0 |2 r! t- n$ V3 @! P$ zwas high, he then read the product information8 z- ?* A& o% A4 w" |
packet and concluded that it was most likely the rea-
3 f( M( ~2 n4 dson for the child’s virilization. At that time, they
7 X) o+ c/ E# `7 zdecided to put the baby in a separate bed, and the% t2 Q) q# j* q4 i7 K' c% M- { X7 u" p
father was not hugging him with bare skin and had7 ^: k2 V/ O* I. `3 j
been using protective clothing. A repeat testosterone
- D' j. w' }+ c( btest was ordered, but the family did not go to the9 w8 Q: o' G4 K. Q1 m
laboratory to obtain the test., w" L$ x6 d/ V) t9 ^( D( y0 |
Discussion
# c! H5 m+ Z/ pPrecocious puberty in boys is defined as secondary7 K4 ]0 u; f* f2 ]$ U+ f% F) ^
sexual development before 9 years of age.1,4
8 k" C% N# T* \/ ePrecocious puberty is termed as central (true) when. }' Z, i0 h! _8 g5 ~6 |; W6 _+ z
it is caused by the premature activation of hypo-2 l' c3 E* O' k C- |
thalamic pituitary gonadal axis. CPP is more com-/ }& Y# S1 W0 T8 Z. n. J
mon in girls than in boys.1,3 Most boys with CPP- R% _# M$ K! F( U
may have a central nervous system lesion that is
3 E) ^! ^: {, W# Z S2 ]responsible for the early activation of the hypothal-
, F1 P8 ~; a! x/ uamic pituitary gonadal axis.1-3 Thus, greater empha-
- s2 i# z1 B9 w1 C; wsis has been given to neuroradiologic imaging in( V/ P' f) w# D N$ x, u A
boys with precocious puberty. In addition to viril-
1 G, M, z; m. [0 e/ q5 z& ~) Yization, the clinical hallmark of CPP is the symmet-
6 u" _' j* E/ Trical testicular growth secondary to stimulation by: d( `2 p' Q) q) f" J* U7 N, J! ^: q
gonadotropins.1,3
5 y0 A0 s! Q3 V- MGonadotropin-independent peripheral preco-
$ Q/ Q. j8 e. E s, [; W* Ucious puberty in boys also results from inappropriate" I) X9 n" W0 P- a1 n
androgenic stimulation from either endogenous or! A/ j' d# N4 ~9 `2 [. L
exogenous sources, nonpituitary gonadotropin stim-
( K# l; d3 H+ q1 y7 ~1 I' I- wulation, and rare activating mutations.3 Virilizing
! C/ [5 I; M2 z. s9 V6 N( J" w# O& econgenital adrenal hyperplasia producing excessive
4 x5 E+ _% V5 S$ X6 Ladrenal androgens is a common cause of precocious2 @- b0 X8 H$ F0 U5 j# O
puberty in boys.3,4
U N" o# l) d. [: J: C, F2 AThe most common form of congenital adrenal
1 O* J% b& \. Q7 k4 e/ f# R# jhyperplasia is the 21-hydroxylase enzyme deficiency.! _% c9 F5 a, B+ F% |
The 11-β hydroxylase deficiency may also result in2 X! L4 H0 q6 _- g4 |, T
excessive adrenal androgen production, and rarely,( X- R2 D" j) A$ {" \
an adrenal tumor may also cause adrenal androgen
) b, J$ x+ t# xexcess.1,3, v( N _3 p) X5 i
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
; O# t! K) k) J542 Clinical Pediatrics / Vol. 46, No. 6, July 2007" d5 k/ _2 u% `
A unique entity of male-limited gonadotropin-
2 K4 O/ q z2 v/ Zindependent precocious puberty, which is also known
! |) \. D4 f. d: |( w, o! b9 Yas testotoxicosis, may cause precocious puberty at a2 @9 R3 p( R3 ^2 p# A; A' U. s
very young age. The physical findings in these boys! a- _+ L8 S/ y$ J
with this disorder are full pubertal development,
- M9 D& [6 g+ z0 k2 p( hincluding bilateral testicular growth, similar to boys w) K' ?8 E( X8 a3 ~% f4 `" x
with CPP. The gonadotropin levels in this disorder
7 H, @+ t3 k: s1 V7 ~7 H, zare suppressed to prepubertal levels and do not show' v! L0 v. W$ M
pubertal response of gonadotropin after gonadotropin-. L. ? K/ v# s+ I
releasing hormone stimulation. This is a sex-linked
) K4 s( n8 v" {& d4 [- Y1 oautosomal dominant disorder that affects only
0 ~4 ~* S' z# y; a7 B. m( Qmales; therefore, other male members of the family
0 W$ r4 e6 U) l( Dmay have similar precocious puberty.3: [/ [$ A) m% B1 x; r
In our patient, physical examination was incon-# o- k* Q% {9 F* k# h g+ A/ r
sistent with true precocious puberty since his testi-* S* m0 y: H- u* f" a! G" K
cles were prepubertal in size. However, testotoxicosis# A0 Z* [. F2 ~) L# a; @
was in the differential diagnosis because his father' x3 i; w0 `! n& g2 z* \0 P
started puberty somewhat early, and occasionally,
8 B* b0 g4 [& w% I. L1 _. ytesticular enlargement is not that evident in the
0 T K% S y1 K; D1 M1 K: H% X4 {beginning of this process.1 In the absence of a neg-5 k, @' n- ]) h8 h: p
ative initial history of androgen exposure, our
+ v6 _5 S+ r$ q* pbiggest concern was virilizing adrenal hyperplasia,: [& m* i$ ?# Z% A/ a. [
either 21-hydroxylase deficiency or 11-β hydroxylase
9 F" m1 V! T4 { ydeficiency. Those diagnoses were excluded by find- M6 q4 U3 i! D/ s1 h* z
ing the normal level of adrenal steroids.7 c) L# {% M8 ]5 U5 S
The diagnosis of exogenous androgens was strongly
. w, W X Q+ \ b& Qsuspected in a follow-up visit after 4 months because
# Y; F" G; y/ k' Mthe physical examination revealed the complete disap-4 `) g% |7 v4 A
pearance of pubic hair, normal growth velocity, and
( d. ?9 ^6 R I5 S5 Rdecreased erections. The father admitted using a testos-
: H" L6 d$ S# G9 v% R, sterone gel, which he concealed at first visit. He was
' s: |, U! k4 K, u/ Q- r0 b5 Lusing it rather frequently, twice a day. The Physicians’) l$ p0 w+ b* k; l& H; g
Desk Reference, or package insert of this product, gel or
' U7 \% C1 Y- Wcream, cautions about dermal testosterone transfer to3 T( W' P+ ?( `- O2 s
unprotected females through direct skin exposure.
' }( d- o; M) S3 }8 d) U. WSerum testosterone level was found to be 2 times the3 W6 C: s* ~/ G# K+ L1 ]9 a
baseline value in those females who were exposed to
6 f+ ~. g+ y' C% Veven 15 minutes of direct skin contact with their male9 ]2 b% t0 Q5 ~! Z
partners.6 However, when a shirt covered the applica-/ e# U6 S$ i) h
tion site, this testosterone transfer was prevented.8 E2 [. }$ e" @4 l- D$ |+ F2 n r
Our patient’s testosterone level was 60 ng/mL,
- s2 p4 }! I! M" _* x4 Vwhich was clearly high. Some studies suggest that7 V5 K3 m# A2 @. I9 ?7 ]
dermal conversion of testosterone to dihydrotestos-
4 K7 \5 j. m/ Q0 f' Nterone, which is a more potent metabolite, is more
# c s! _$ N2 F: n# Qactive in young children exposed to testosterone8 ]9 O- n5 @3 ^$ X
exogenously7; however, we did not measure a dihy-
4 p( q2 q4 z: K6 R6 rdrotestosterone level in our patient. In addition to, `* f: X) f, h' s4 D& y
virilization, exposure to exogenous testosterone in
* m' I# M5 N% T$ I7 Pchildren results in an increase in growth velocity and8 w/ }1 T' E5 a
advanced bone age, as seen in our patient.8 e* S) Q; y& h/ ]" r. ^6 v3 W
The long-term effect of androgen exposure during
" x: Z+ W, [7 y4 _early childhood on pubertal development and final. T' Z* n \0 D5 e
adult height are not fully known and always remain
) z h( i+ I6 g8 P- i) X9 Ga concern. Children treated with short-term testos-& |+ R, k0 z' b+ h; x
terone injection or topical androgen may exhibit some0 n# A- l4 V, F/ B
acceleration of the skeletal maturation; however, after) N5 I4 T! v: i m d+ ?% \( U+ T
cessation of treatment, the rate of bone maturation
3 j0 }) R" e. Q; t& h6 p5 x$ `/ L8 hdecelerates and gradually returns to normal.8,9
6 R9 h) f# V( d" f* {5 N9 _There are conflicting reports and controversy
1 s5 a! F+ ?3 hover the effect of early androgen exposure on adult3 `; S+ U0 u T" d$ }3 W9 A" I
penile length.10,11 Some reports suggest subnormal
3 n, n# ]$ r+ R3 A& f, nadult penile length, apparently because of downreg-
. d: [( q$ v) l2 t( Y5 Vulation of androgen receptor number.10,12 However,
9 ] s- M' `, f$ y; aSutherland et al13 did not find a correlation between* M+ i ^! w @( p" N
childhood testosterone exposure and reduced adult
/ k2 h$ P* v0 }- r( h1 H2 {penile length in clinical studies.
3 X3 W- o0 U$ d$ C, x! `! BNonetheless, we do not believe our patient is% A! z9 G5 k _0 M# R' ^
going to experience any of the untoward effects from
9 O4 k! G2 }: G0 n$ E9 rtestosterone exposure as mentioned earlier because
( c2 D( m; C5 u+ E& ?the exposure was not for a prolonged period of time.
# `. z3 L& }8 { e7 G; [Although the bone age was advanced at the time of
+ O! F+ n- U8 N; T7 J' Bdiagnosis, the child had a normal growth velocity at0 g1 }1 O, ^4 I! j4 u
the follow-up visit. It is hoped that his final adult
: \' G h, P9 _1 z% G# j) theight will not be affected.
( h. `3 e2 x i' N: S- H! G1 JAlthough rarely reported, the widespread avail-* w4 W7 j) j8 q
ability of androgen products in our society may
9 S3 f& l. E8 j! jindeed cause more virilization in male or female
; T' V9 Z6 ]4 k G! ochildren than one would realize. Exposure to andro-
, s, T/ O- @/ ~7 W% l+ Y4 ] agen products must be considered and specific ques-
4 I+ A" a+ Q1 |* d' |) Rtioning about the use of a testosterone product or8 y" ?9 X* N" B `$ j
gel should be asked of the family members during& k" @3 m: e8 M+ a v
the evaluation of any children who present with vir-$ u0 q4 h8 H/ f' E- B3 c
ilization or peripheral precocious puberty. The diag-
H( R* |% r1 i8 {nosis can be established by just a few tests and by$ }; Y2 t, Y* w& S
appropriate history. The inability to obtain such a
4 _) V6 B/ R8 T) }history, or failure to ask the specific questions, may: G' `& `) t9 x& A0 m8 \ }
result in extensive, unnecessary, and expensive
. M* H3 Z: Q Y8 G+ Dinvestigation. The primary care physician should be, e# Q0 W5 {5 d
aware of this fact, because most of these children
* _7 m( G8 d. ~; z; K ^may initially present in their practice. The Physicians’
2 B$ y: D/ Y% ^# z) u3 XDesk Reference and package insert should also put a3 U; l3 i; j6 E$ N- O5 W
warning about the virilizing effect on a male or. y, @+ q, L6 v( J9 A
female child who might come in contact with some-
j# P/ K- q- e" |! wone using any of these products.
* J" S$ L9 L+ v" I5 Y; x+ KReferences
4 }; k6 h: p" ~& O/ }1. Styne DM. The testes: disorder of sexual differentiation
: V# [* o. {6 u& b! h- dand puberty in the male. In: Sperling MA, ed. Pediatric
4 a( e- j4 @% Z4 aEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
1 ^0 f2 q6 G& B" ~; B2002: 565-628.
* i+ ~. O& C; a- A' W% M2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious, l: l% T7 n( {
puberty in children with tumours of the suprasellar pineal6 E1 D! c: ~5 h: ]. {& X) [* |! A
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from9 I5 o, O7 x" S0 h& i+ `5 f/ X7 ~
Topical Testosterone Exposure / Bhowmick et al 5432 T$ t3 x Z$ x) h, M: `
areas: organic central precocious puberty. Acta Paediatr.2 M5 R# y7 U% o; @- W& j
2001;90:751-756.8 }' }( T7 y" J: j1 F, A! `" g
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
0 Z9 K- U! L8 @; `' [) o/ ZPediatric Endocrinology. 4th ed. New York, NY: Marcel
8 B4 \7 \! x: t7 LDekker Inc; 2003:211-238.) [0 U2 k" q2 J2 B; I6 f
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual1 f" L: C" u1 v* i( |# {$ O9 k( W
development in a two-year-old boy induced by topical: J1 ?$ }4 ^ S
exposure to testosterone. Pediatrics. 1999;104:e23.
/ S* t+ S& S. B3 c' [5 q) L+ q- [5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
3 |/ J0 z7 Y3 |3 E9 i1 O' i! _0 R9 CSkeletal Development of the Hand and Wrist. 2nd ed.
* b2 o' ~; W4 b) b& j! y4 GStanford, CA: Stanford University Press; 1959.% C. b8 E: _ g. P. J4 f6 O
6. Physicians’ Desk Reference. Androgel 1% testosterone,3 o: T7 t _/ L6 j9 j. J$ S
Unimed Pharmaceutical Inc. Montvale, NJ: Medical# t n; \! {: i' n
Economics Company, Inc; 2004:3239-3241.
G3 U* h0 T3 F" [( C: I2 ?9 Q7. Klugo RC, Cerny JC. Response of micropenis to topical
# \. A, b2 w: F/ L0 A, atestosterone and gonadotropin. J Urol. 1978;119:
. V$ X, Y/ y9 y% q667-668.
- ^% T7 b. t9 B' a+ i8. Guthrie RD, Smith DW, Graham CB. Testosterone
& q- Y" L$ [# a9 h/ O9 @. j: btreatment for micropenis during early childhood. J Pediatr.$ ` g$ }7 ?' f5 E; A' t4 @% l! [
1973;83:247-252.4 l$ g" t5 l2 F& y$ y
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone1 k- F; c! Y4 B6 W. a
therapy for penile growth. Urol. 1975;6:708-710.. S9 w" Z* Y: a/ h
10. Husmann DA, Cain MP. Microphallus: eventual phallic
* A1 |, y3 D& k4 H, A- j- k0 jsize is dependent on the timing of androgen administra-+ H" c8 b/ ?4 g/ d1 L! I X6 K! ~
tion. J Urol. 1994;152:734-739.& k6 Q& V, C; B) s
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:1 o. t3 ?$ `& V' ]9 a
does early treatment with testosterone do more harm
, f. j9 z1 e( Q. Ythan good? J Urol. 1995;154:825-829.
: n! D) m/ I' B) {12. Takane KK, George FW, Wilson JD. Androgen receptor8 Z6 k) L9 m4 Z% G. d7 X
of rat penis is down-regulated by androgen. Am J Physiol.
) E; r: l5 F2 l- C1 a1990;258:E46-E50.
/ P$ W8 f1 P7 y: m6 M13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
- W; i- r0 |) T/ O+ u, {7 T6 t% `* kof prepubertal androgen exposure on adult penile
+ F# g0 F) u7 {( @( n- ^" U+ slength. J Urol. 1996;156:783-787. |
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