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is a significant concern for physicians. Central/ t+ @3 g- O! e4 N
precocious puberty (CPP), which is mediated# v* Q) F( I- o. I
through the hypothalamic pituitary gonadal axis, has( ?3 `* j) p3 m t. S. I$ G6 U" h
a higher incidence of organic central nervous system
4 @; s/ V+ z2 v7 U! e3 g; J" rlesions in boys.1,2 Virilization in boys, as manifested
9 B% v. m7 H/ k+ cby enlargement of the penis, development of pubic1 e# w$ }9 ~6 `
hair, and facial acne without enlargement of testi-$ H) u; j, S1 N5 D7 u: `
cles, suggests peripheral or pseudopuberty.1-3 We
& `; c3 y0 Q& Breport a 16-month-old boy who presented with the$ N* {$ E- L$ \: y
enlargement of the phallus and pubic hair develop-3 w* W0 d2 i) D% X
ment without testicular enlargement, which was due
" J' V6 Q3 m3 Z! nto the unintentional exposure to androgen gel used by: y7 l+ |3 A1 E; p. H
the father. The family initially concealed this infor-
& W! i) D# Y9 Y1 _" x1 ]' I" r0 Nmation, resulting in an extensive work-up for this. d# u( b% }( M! K2 r
child. Given the widespread and easy availability of
& |* v( S8 u' f+ W1 i; P0 ~testosterone gel and cream, we believe this is proba-
! Z7 }! S3 {( M; g4 J7 V# ubly more common than the rare case report in the
8 I- f& x( M1 T. y6 iliterature.4
' I; z$ I& a; I7 ^5 ?" RPatient Report
' q$ s2 s* }# V1 g) @1 VA 16-month-old white child was referred to the
+ [. r) Q3 d* @; nendocrine clinic by his pediatrician with the concern9 z! ?7 m, S/ B6 R2 ?
of early sexual development. His mother noticed+ r1 J. \. c4 h7 b3 r# Y
light colored pubic hair development when he was' o- \: J/ S; M" R; H
From the 1Division of Pediatric Endocrinology, 2University of
9 s( U/ |, l) q6 eSouth Alabama Medical Center, Mobile, Alabama.2 e4 B9 o- J; {# r2 {. t
Address correspondence to: Samar K. Bhowmick, MD, FACE,
* O$ l z/ f- u F' ^8 jProfessor of Pediatrics, University of South Alabama, College of: y1 J$ \" G& G7 D
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
9 Q7 Z* v; R A- Y) we-mail: [email protected].5 Y& ^& @3 h. _) \
about 6 to 7 months old, which progressively became: U Z; d) `. C
darker. She was also concerned about the enlarge-
8 I# t- C! Y. A- C6 J. r9 j, vment of his penis and frequent erections. The child5 N+ ^- F' K, Z
was the product of a full-term normal delivery, with( b4 q/ ^6 d3 y% v& }( i) M7 D. n
a birth weight of 7 lb 14 oz, and birth length of
9 d* W, u- q4 o3 [$ s20 inches. He was breast-fed throughout the first year
$ o: D! {1 P7 B; ]7 @. x: ?* Tof life and was still receiving breast milk along with
" O# _, z4 E# F1 [' jsolid food. He had no hospitalizations or surgery,
8 ^& h( n1 N1 k! fand his psychosocial and psychomotor development
+ ~8 Y) I+ {5 O5 Swas age appropriate.. O n# Q4 U" q; F* g
The family history was remarkable for the father,1 G% R' T `# v6 F
who was diagnosed with hypothyroidism at age 16,5 U& z6 d8 f2 w {1 w
which was treated with thyroxine. The father’s) `8 H" | A5 H
height was 6 feet, and he went through a somewhat
: ^4 @1 y1 b6 W3 g# E. x% t, Xearly puberty and had stopped growing by age 14./ Y+ V: I+ y8 G5 k
The father denied taking any other medication. The0 V9 q8 T/ M( Y# ^5 z
child’s mother was in good health. Her menarche: T3 v" J3 N! U
was at 11 years of age, and her height was at 5 feet$ _) ?4 X) H5 C7 D
5 inches. There was no other family history of pre-
/ A X1 f. ^0 c( C* ]3 F- xcocious sexual development in the first-degree rela-0 [& t* K Y2 A( R Z7 U# X3 E1 o
tives. There were no siblings.
- k, p5 C- E# TPhysical Examination5 r; D3 g' T9 H
The physical examination revealed a very active,
( l; y0 {0 c& ~7 wplayful, and healthy boy. The vital signs documented
' X6 `2 x& u1 ?' S# f2 va blood pressure of 85/50 mm Hg, his length was6 x, ?7 m" N8 M" Z, i9 @
90 cm (>97th percentile), and his weight was 14.4 kg) {# D9 K: J7 Q3 ]6 H# h% X5 m' b
(also >97th percentile). The observed yearly growth
; O- L: c7 h! [8 `/ i2 Rvelocity was 30 cm (12 inches). The examination of, Y& F; u% ?2 X9 N
the neck revealed no thyroid enlargement.
1 P; Q) l8 \3 t: O: nThe genitourinary examination was remarkable for
7 R+ e8 n3 p$ A5 `, A) n. I9 Q3 venlargement of the penis, with a stretched length of+ |6 P0 x" g4 L0 ?2 |1 P
8 cm and a width of 2 cm. The glans penis was very well
$ P( W4 ^( ?. o5 l- ]& N% hdeveloped. The pubic hair was Tanner II, mostly around! L) Z: n; M, L" b o
540
$ ?4 Q1 h! C/ Eat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from4 G6 D0 Z' l8 ~4 r7 N6 v
the base of the phallus and was dark and curled. The
' D% f! T2 x, t. X% Stesticular volume was prepubertal at 2 mL each.6 w% z5 q$ }0 ?; d* B; a$ L
The skin was moist and smooth and somewhat
% f1 w5 i/ i- l# |2 ?/ I% hoily. No axillary hair was noted. There were no
! K/ q$ F0 A0 p) Q/ M$ jabnormal skin pigmentations or café-au-lait spots.; a2 e1 v3 y7 ?
Neurologic evaluation showed deep tendon reflex 2+
; E5 p& D* b. i. m$ {# Bbilateral and symmetrical. There was no suggestion- w2 Q( z3 s# e i- n
of papilledema.
, h3 h8 ~* u5 `9 `5 p9 {Laboratory Evaluation+ a9 x8 D0 t2 G! o
The bone age was consistent with 28 months by2 W/ }1 g1 P0 Z: u0 A* O# K. I
using the standard of Greulich and Pyle at a chrono-/ I! W1 z% i1 E6 w) a4 e- ]2 o
logic age of 16 months (advanced).5 Chromosomal D/ b3 n ^( q+ C- Y* x! y
karyotype was 46XY. The thyroid function test
3 A' X& H! G* k9 b% B" K; Lshowed a free T4 of 1.69 ng/dL, and thyroid stimu-0 [. a( E8 u) Q' @% ?
lating hormone level was 1.3 µIU/mL (both normal).$ B- `0 F: Q- r/ i& a o) N* z) }2 O' I
The concentrations of serum electrolytes, blood3 @& b& b4 Q$ G: A# z
urea nitrogen, creatinine, and calcium all were: U" \. x' J6 d; ~0 ]
within normal range for his age. The concentration
4 G; d' b/ N7 H5 ?7 ?) |: B, Wof serum 17-hydroxyprogesterone was 16 ng/dL" _$ F2 {8 l% Z6 y$ M
(normal, 3 to 90 ng/dL), androstenedione was 20
) G% o. C" T: |6 H) l; ang/dL (normal, 18 to 80 ng/dL), dehydroepiandros-6 K$ }) O" p' q
terone was 38 ng/dL (normal, 50 to 760 ng/dL),
: a; R% n; w% ]desoxycorticosterone was 4.3 ng/dL (normal, 7 to
0 u2 x# F" b. ^7 f! E- U49ng/dL), 11-desoxycortisol (specific compound S)
2 `; E* v- _! |; uwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-2 g& K( J6 o, X; |
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total" R9 z; p2 w" \# M
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),( _4 p% J# e) t0 {( @/ z( P
and β-human chorionic gonadotropin was less than, }6 |! Z, ]; [2 A( w- C- C
5 mIU/mL (normal <5 mIU/mL). Serum follicular) A0 C' R- f0 K' J
stimulating hormone and leuteinizing hormone' d0 X9 e! p9 C
concentrations were less than 0.05 mIU/mL
) I& ?, P# c7 m* e$ }(prepubertal).
6 ^$ {& s" w7 A# S9 u1 ]! |2 l! qThe parents were notified about the laboratory
4 v) z: P/ s! Mresults and were informed that all of the tests were
% ^) x! E# p7 K7 J3 `normal except the testosterone level was high. The2 {' b- _% M5 I& R A9 A
follow-up visit was arranged within a few weeks to
. f& G+ T$ j# W/ a# Yobtain testicular and abdominal sonograms; how-1 ]. E3 ^, C1 q- C
ever, the family did not return for 4 months.
; `7 s4 x$ I2 b2 [& m4 }; [! tPhysical examination at this time revealed that the
& U8 p% C/ N$ j4 f$ m4 Lchild had grown 2.5 cm in 4 months and had gained& O% `: j* `* w8 t: i K! m2 b
2 kg of weight. Physical examination remained; g, V1 D& k! X5 q
unchanged. Surprisingly, the pubic hair almost com-9 r1 A5 X0 d: G8 I6 ~, W
pletely disappeared except for a few vellous hairs at8 J% Q( W' q9 v9 i7 p8 \
the base of the phallus. Testicular volume was still 2
5 n- v5 ]3 r3 umL, and the size of the penis remained unchanged.3 v1 _ v" d9 I" b9 z
The mother also said that the boy was no longer hav-' F# }+ Y/ `; P- H$ V
ing frequent erections.
9 y$ b% X, t5 `+ _9 HBoth parents were again questioned about use of
# Z. m2 Q$ B7 i1 D: G+ ~any ointment/creams that they may have applied to% ^ h% b% d5 J+ S
the child’s skin. This time the father admitted the' E3 W# ^# J t) G: z h6 `
Topical Testosterone Exposure / Bhowmick et al 541
+ F, Z* x# D# E7 M# y, `use of testosterone gel twice daily that he was apply-
' K; Y" M4 J. Ting over his own shoulders, chest, and back area for" _0 x/ B& q2 b/ }+ B' |
a year. The father also revealed he was embarrassed. ^# z) u* W- n: r- L
to disclose that he was using a testosterone gel pre-/ W" O0 v; Z8 ^. V7 J( s, D! Z! c
scribed by his family physician for decreased libido
$ F. `5 Q x" hsecondary to depression.$ F d1 w. f; \1 G h6 J" V
The child slept in the same bed with parents.
2 ~; t6 Z2 X9 J* ^& P; kThe father would hug the baby and hold him on his6 X5 R" {+ B5 u8 O+ E/ ~- s1 H
chest for a considerable period of time, causing sig-
& S0 X4 E6 u, K+ I0 }/ Tnificant bare skin contact between baby and father.8 Z: _* g7 D2 Q/ c0 f9 O
The father also admitted that after the phone call,7 x3 @' l: t! u0 R8 e% m! p; g
when he learned the testosterone level in the baby
0 a+ F& V4 z k) o- zwas high, he then read the product information7 R1 `0 S' `7 b' o) [6 S9 [
packet and concluded that it was most likely the rea-
8 [$ N' ~2 s& ~7 |3 D/ W1 b4 S4 Gson for the child’s virilization. At that time, they
/ l) m+ O& o0 j5 z7 Q4 Idecided to put the baby in a separate bed, and the' k% Y9 @" ]2 N9 P/ K! @
father was not hugging him with bare skin and had
2 r: t. U! i+ K$ Bbeen using protective clothing. A repeat testosterone0 a+ ?4 n. ]. e# Z) G
test was ordered, but the family did not go to the
* j8 f% I: i2 x! D6 J7 flaboratory to obtain the test.
1 R2 M* v! ^* z, Z& @Discussion( }3 \1 C& u. W
Precocious puberty in boys is defined as secondary
1 ?" a$ a5 ~ `! s5 o6 m* nsexual development before 9 years of age.1,4
7 [& F- r0 T- d( ZPrecocious puberty is termed as central (true) when8 |- Z" U6 H. W3 k" E
it is caused by the premature activation of hypo-4 R8 d/ J4 g* w5 E9 R2 G( b' q
thalamic pituitary gonadal axis. CPP is more com-
d/ ], o9 I+ }( \mon in girls than in boys.1,3 Most boys with CPP
4 O/ [3 |' U2 Q) B0 _, z* xmay have a central nervous system lesion that is6 L* J X4 |9 y' Z8 F
responsible for the early activation of the hypothal-
% c F4 l2 l$ O) Wamic pituitary gonadal axis.1-3 Thus, greater empha-
" _5 ^# p# M4 }' N0 ?4 b! \$ e7 l$ ysis has been given to neuroradiologic imaging in
2 X* N: w7 X3 S* y% F8 cboys with precocious puberty. In addition to viril-
( j' y2 h8 \0 ~+ O* U( Lization, the clinical hallmark of CPP is the symmet- ^9 l R6 B* M; U
rical testicular growth secondary to stimulation by
7 L b. W: j- cgonadotropins.1,3- `4 `: I5 w, Y2 n. Z& a
Gonadotropin-independent peripheral preco-
2 {. g/ C6 Y3 s+ u) acious puberty in boys also results from inappropriate0 h7 C0 r7 s4 }9 b+ Z" z
androgenic stimulation from either endogenous or* X/ h% M% X" l$ \
exogenous sources, nonpituitary gonadotropin stim-
4 _) ?& z9 @: q- k: ~8 qulation, and rare activating mutations.3 Virilizing
6 y: L8 r% S# jcongenital adrenal hyperplasia producing excessive: n& @. f! `. i, R
adrenal androgens is a common cause of precocious# \3 G' G7 V$ Y4 t2 ?2 T
puberty in boys.3,41 k) \5 K9 p6 U; d7 F4 y; _. b
The most common form of congenital adrenal+ A; q- R7 R S/ L) a! c4 K
hyperplasia is the 21-hydroxylase enzyme deficiency.
. B. p/ T- k$ H0 e( R/ n8 \The 11-β hydroxylase deficiency may also result in
/ }5 B0 Q$ W5 d5 `- b B& I8 T K( jexcessive adrenal androgen production, and rarely,5 c1 g" V4 T9 O. z/ Q1 l
an adrenal tumor may also cause adrenal androgen6 p3 {/ e, e4 F+ ]( `1 }" n( b
excess.1,3
( ^; o+ M1 ^ ^% bat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
" h9 q' K! C( p+ X+ F542 Clinical Pediatrics / Vol. 46, No. 6, July 2007* K/ A4 V, w: P
A unique entity of male-limited gonadotropin-
: B3 p6 N0 L) d. T- i4 S1 p6 Jindependent precocious puberty, which is also known
5 s! U ]. g3 y* N, ]7 W4 Gas testotoxicosis, may cause precocious puberty at a4 I0 [( O3 Z7 U p' ]* z: E
very young age. The physical findings in these boys0 P- ^) p" g* r2 N' _* V
with this disorder are full pubertal development,: R9 [5 e# a' ]+ T
including bilateral testicular growth, similar to boys# Y+ s6 ~7 _$ H n# ~9 C
with CPP. The gonadotropin levels in this disorder
% M7 o; r o: h( k; Pare suppressed to prepubertal levels and do not show
+ `( Z3 t# a: U9 @& `3 Zpubertal response of gonadotropin after gonadotropin-5 _+ k/ f. L5 N6 r V
releasing hormone stimulation. This is a sex-linked
; R; C( ]$ N8 @8 q$ qautosomal dominant disorder that affects only* N# Q# ?/ G/ a8 g' x- D
males; therefore, other male members of the family4 ^) j; b" V: g( Y5 i
may have similar precocious puberty.37 K6 D v$ e$ i: V) n: Z& g9 B8 g
In our patient, physical examination was incon-
) W. u( m5 ^! O, msistent with true precocious puberty since his testi-* q7 {$ E8 F# H8 G: X! A% D( a
cles were prepubertal in size. However, testotoxicosis" {) v# I* I( D1 g7 {& N$ n
was in the differential diagnosis because his father
2 a* ]# D8 j# c* U/ S. ]( Ystarted puberty somewhat early, and occasionally,
, @# H: Z3 }# F& R. T; Htesticular enlargement is not that evident in the& J# M+ q% e, q( |# \: ]3 g
beginning of this process.1 In the absence of a neg-, Z Q3 v8 S" W! B2 m4 E
ative initial history of androgen exposure, our6 |4 t7 n: ~! G. q2 D
biggest concern was virilizing adrenal hyperplasia, o# y6 m0 h: l3 X: y
either 21-hydroxylase deficiency or 11-β hydroxylase) @- o2 o8 E0 f
deficiency. Those diagnoses were excluded by find-
" X% y5 f3 R0 ^/ Q- j6 c) z, X: `& I" Ging the normal level of adrenal steroids.
! w* t# k* }' K, g% a" qThe diagnosis of exogenous androgens was strongly
. X: \: w, ~+ E: h9 V' w2 Ksuspected in a follow-up visit after 4 months because
E, X, R: ]% o& pthe physical examination revealed the complete disap-
! S$ n0 s* R; spearance of pubic hair, normal growth velocity, and
4 Z. X9 _; j5 V* gdecreased erections. The father admitted using a testos- P8 `9 K N. D( }
terone gel, which he concealed at first visit. He was& Z; A8 R" r9 g7 n# J
using it rather frequently, twice a day. The Physicians’! o t# u$ ~' A" n/ a2 B
Desk Reference, or package insert of this product, gel or0 V6 X _2 Y1 E
cream, cautions about dermal testosterone transfer to9 J+ u3 q* l0 M$ f0 u, v
unprotected females through direct skin exposure.; J3 y/ u3 _! R+ j& `* k
Serum testosterone level was found to be 2 times the) }9 D6 p {6 c. w. [! B3 T! d
baseline value in those females who were exposed to$ k- w, M/ j# J" y% }
even 15 minutes of direct skin contact with their male
; S" {. m0 J) O( d& d; Z1 U3 Dpartners.6 However, when a shirt covered the applica-( W$ |/ c. B: n0 {+ A
tion site, this testosterone transfer was prevented." T# }$ l; U' N, O0 k5 v; [: O
Our patient’s testosterone level was 60 ng/mL,! d" ]( Z: W9 I( p- i
which was clearly high. Some studies suggest that
: t Y) n, `# l8 {dermal conversion of testosterone to dihydrotestos-1 A1 c" ^. @ z% i6 X
terone, which is a more potent metabolite, is more1 ?( K: A$ s! \
active in young children exposed to testosterone5 I# h- x* V6 ?2 g% I) q
exogenously7; however, we did not measure a dihy-
T( j1 I% P/ B+ Wdrotestosterone level in our patient. In addition to* w B& r1 E+ \& |6 b
virilization, exposure to exogenous testosterone in
: Z6 c: h6 u! L" I' \9 uchildren results in an increase in growth velocity and
) }8 i, w$ {4 D, l9 cadvanced bone age, as seen in our patient.
$ [8 x3 F, H4 P, S" k" W, @- \( eThe long-term effect of androgen exposure during, Z7 a% f1 j* m. u7 e$ e ]2 E0 o* a
early childhood on pubertal development and final
5 |2 I3 K, G, R7 Yadult height are not fully known and always remain9 W( K9 w, P2 J) _
a concern. Children treated with short-term testos-% y# A3 W/ v3 G3 R, l9 O, q
terone injection or topical androgen may exhibit some
2 y% l" J. l- {acceleration of the skeletal maturation; however, after* J, W2 D. e( ?3 @+ p* V/ l
cessation of treatment, the rate of bone maturation
! }: R3 U( J3 @1 idecelerates and gradually returns to normal.8,9. j/ a- [% c, T% v6 Q
There are conflicting reports and controversy- n9 q9 g$ p8 y1 U' G2 }. z
over the effect of early androgen exposure on adult
8 R- B8 Q5 W! ?( K/ | Hpenile length.10,11 Some reports suggest subnormal1 B5 ~5 h% b& e7 |- z1 a
adult penile length, apparently because of downreg-( M6 k6 y. K8 K% }6 d( h
ulation of androgen receptor number.10,12 However,9 m0 B9 A7 H/ m/ c
Sutherland et al13 did not find a correlation between! a- ?$ v1 K* h! ?1 K) c
childhood testosterone exposure and reduced adult
3 q& g; Z1 Z- c1 `. j npenile length in clinical studies.
v ]9 y5 ^1 i, S+ E. ], aNonetheless, we do not believe our patient is
+ |. \1 I0 z3 D' e( n. v3 igoing to experience any of the untoward effects from. \5 d" U# a$ {+ u- l( b9 j
testosterone exposure as mentioned earlier because3 `. O3 r0 `! z0 Q$ `
the exposure was not for a prolonged period of time.
0 I) ]& k: U W7 tAlthough the bone age was advanced at the time of" S8 [: H; R8 q# w
diagnosis, the child had a normal growth velocity at
! m! v# a" M8 \) q, s: Pthe follow-up visit. It is hoped that his final adult+ E9 H8 F+ t, @0 L
height will not be affected.
8 G8 b. L7 [1 {" q t( S$ O7 B+ Z6 dAlthough rarely reported, the widespread avail-
! C0 l! w( _( Cability of androgen products in our society may# [$ s' d5 V0 ^1 u
indeed cause more virilization in male or female. H) [8 _0 K, N M
children than one would realize. Exposure to andro-
1 O1 K" n0 {3 P3 v5 Ogen products must be considered and specific ques-
9 N# u2 v8 L0 [& c7 [tioning about the use of a testosterone product or' R2 l6 S- Q( o4 a z# s* U2 Z
gel should be asked of the family members during
9 d2 y( H5 F9 R. I1 r p) Zthe evaluation of any children who present with vir-8 l) `% ]+ R" {7 d
ilization or peripheral precocious puberty. The diag-% z5 T3 l" x B% I- O2 P
nosis can be established by just a few tests and by1 E* r2 J1 o, C& t) O! s+ ^
appropriate history. The inability to obtain such a& k) s$ }- ^$ k- Q' G
history, or failure to ask the specific questions, may0 j$ b& Q, d% O, H5 `' n7 ~
result in extensive, unnecessary, and expensive
5 G* q; u9 z7 `- B; }" @/ c iinvestigation. The primary care physician should be
5 b: ]/ T0 v5 j/ r4 S( ~6 xaware of this fact, because most of these children
! P* G5 D: S8 o' e( q" l+ smay initially present in their practice. The Physicians’$ M6 V" Q' `( ]; m% ]* S: T
Desk Reference and package insert should also put a
4 Q/ g, U0 L: n3 }: ]9 |warning about the virilizing effect on a male or6 _3 b0 |& b( H5 c
female child who might come in contact with some-' z. e4 I. L7 t' [
one using any of these products.: U- c9 c; n3 w* r' a; _3 h8 b9 j
References
, A6 c' j3 ^, a% D( x1. Styne DM. The testes: disorder of sexual differentiation+ ?3 C p+ N7 p3 _# i. P+ t
and puberty in the male. In: Sperling MA, ed. Pediatric
/ B6 i$ s5 h4 @Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;$ W, z' l2 u9 {. C# t
2002: 565-628.
* i( \1 V6 S% W. R6 J1 H$ a7 B2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious7 u% Q) m A: i& v
puberty in children with tumours of the suprasellar pineal: ?: ]2 P: Z- W% ]5 L7 f$ L$ D
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from8 Y. E1 a9 s Y" X8 c! m& W, ^1 C4 m
Topical Testosterone Exposure / Bhowmick et al 5438 o6 y! u; {, z$ I
areas: organic central precocious puberty. Acta Paediatr.
3 S+ Y9 h- ?, C- k0 O2 c2001;90:751-756.( M2 w$ S7 R1 T* b
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed." v6 b' [3 g8 L, x$ a0 q: s* w
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
( C; V/ X1 i* t& H ZDekker Inc; 2003:211-238.$ \+ A. L+ J1 @
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual* M5 v8 H( N# C! A
development in a two-year-old boy induced by topical! J! ^; q* d0 S, ~
exposure to testosterone. Pediatrics. 1999;104:e23.
3 H3 j6 {' n3 P2 B" D4 b5. Greulich WW, Pyle SI, eds. Radiographic Atlas of% W5 F; w9 Q8 i' v
Skeletal Development of the Hand and Wrist. 2nd ed.
) M7 J$ ^* v+ u" u/ wStanford, CA: Stanford University Press; 1959.5 p6 h2 a: k' c# E* B V
6. Physicians’ Desk Reference. Androgel 1% testosterone,
2 d9 B1 q3 m' c. P3 y: Y9 Z2 YUnimed Pharmaceutical Inc. Montvale, NJ: Medical8 E6 T* K8 w M& Y& k) J2 ~
Economics Company, Inc; 2004:3239-3241.; O5 w, n. W# Y0 r4 U/ i" _
7. Klugo RC, Cerny JC. Response of micropenis to topical
7 m( J4 ^- u! _* @8 @( o+ m$ ?testosterone and gonadotropin. J Urol. 1978;119:
/ P6 K# u3 V0 m7 ^3 [3 \' L- X667-668.
( h" @# F4 G; a; C8. Guthrie RD, Smith DW, Graham CB. Testosterone/ u! O: u$ [6 m7 f
treatment for micropenis during early childhood. J Pediatr.
4 U6 A+ r* @; J7 C2 Q. Y" T1973;83:247-252./ S. q5 n$ @, x+ _
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
; ^! H! A$ ? v/ ]therapy for penile growth. Urol. 1975;6:708-710.! @1 \& `3 J) N1 O0 S( z
10. Husmann DA, Cain MP. Microphallus: eventual phallic
1 R7 R3 [! e7 t p+ w2 qsize is dependent on the timing of androgen administra-
( i5 w- ~: ?5 `* X) Etion. J Urol. 1994;152:734-739.
% h" @- M( E5 I11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
% P4 p; `1 i+ A3 L/ ^does early treatment with testosterone do more harm
( c. }6 N6 D% l0 i/ ~6 s' m. T- mthan good? J Urol. 1995;154:825-829. | }# g6 c" Y' n7 M
12. Takane KK, George FW, Wilson JD. Androgen receptor
2 W7 V4 H) v) ]- u" Nof rat penis is down-regulated by androgen. Am J Physiol.( y2 `0 O7 ~' P$ b- l- Y$ b% q
1990;258:E46-E50.% h. G* S1 D# N% R- J
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
" R* v: J+ p) l7 \0 ?9 O4 k' C) jof prepubertal androgen exposure on adult penile
5 f7 @( D5 ]7 Ilength. J Urol. 1996;156:783-787. |
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