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is a significant concern for physicians. Central
9 V, ~6 @# P; m. _* a& ~5 qprecocious puberty (CPP), which is mediated
% x& r* m, C. X; fthrough the hypothalamic pituitary gonadal axis, has
: V p, a* @6 sa higher incidence of organic central nervous system
6 d& S) b: a) |: v/ f* P& alesions in boys.1,2 Virilization in boys, as manifested
% g# L$ u3 U$ i2 k4 K' ~3 V/ Z) j+ Zby enlargement of the penis, development of pubic
6 Y; ^1 `/ F7 s! G+ fhair, and facial acne without enlargement of testi-
0 J! V. a% k- c! dcles, suggests peripheral or pseudopuberty.1-3 We" @# i" z% w. M" J4 f* I; {
report a 16-month-old boy who presented with the
- v8 O: t) w: M( |enlargement of the phallus and pubic hair develop-$ x( a7 A# ]: U2 w3 \! X
ment without testicular enlargement, which was due6 o/ w, h: v- {7 e" u. o" U
to the unintentional exposure to androgen gel used by
1 o, n/ E' ]0 Lthe father. The family initially concealed this infor-8 N0 ^8 N- N* _/ z, i
mation, resulting in an extensive work-up for this5 D! a! a; p/ v' J6 J3 r" n* n) b
child. Given the widespread and easy availability of8 ?' Y- Y6 X \8 e, O( }
testosterone gel and cream, we believe this is proba-
3 k; a' a0 @- d: M9 Hbly more common than the rare case report in the) R( c& B0 K9 r/ G7 V' h$ k
literature.4
! y+ J/ k8 C9 x6 q+ MPatient Report2 k: W3 U9 o# ~& e c
A 16-month-old white child was referred to the& W$ Y/ g7 I& a/ S. @7 Z
endocrine clinic by his pediatrician with the concern
3 |4 @1 }5 q$ y* R! Uof early sexual development. His mother noticed; l/ P: J5 U; R6 Q$ q
light colored pubic hair development when he was. q: q {$ k1 i1 t6 D
From the 1Division of Pediatric Endocrinology, 2University of' F. j4 W# q( f" O( ]
South Alabama Medical Center, Mobile, Alabama.
; [/ v4 Q0 K: r4 `2 C; Y' A: @Address correspondence to: Samar K. Bhowmick, MD, FACE,7 y3 I# i1 ^5 x/ B* s$ s9 z w
Professor of Pediatrics, University of South Alabama, College of k/ i) a- s! N6 c0 p( a. r0 J
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
8 ~+ D4 b1 k, b/ X$ ~9 Se-mail: [email protected].
+ I$ i$ G. N# r- w& Iabout 6 to 7 months old, which progressively became
8 d) q% z+ R1 ^& t* `darker. She was also concerned about the enlarge-
/ P- ]& U, D- y; ~) ~ \2 _. Fment of his penis and frequent erections. The child
5 J2 |& B5 w0 J1 T: Hwas the product of a full-term normal delivery, with
, i2 i+ r* h' ~) ga birth weight of 7 lb 14 oz, and birth length of+ h3 F$ l* b9 F% n
20 inches. He was breast-fed throughout the first year
- Y7 H8 Y, Q! Z, {% `of life and was still receiving breast milk along with( D" E/ A! l% U7 H7 |
solid food. He had no hospitalizations or surgery,
5 K+ T" Q( g* z* P8 dand his psychosocial and psychomotor development
5 l8 C) D. N0 Z/ P1 Swas age appropriate.2 b3 K! | R& p3 Z- K
The family history was remarkable for the father,
5 ?4 C8 u" o/ ]! [who was diagnosed with hypothyroidism at age 16,
& Z2 V# @9 }( m( G8 |which was treated with thyroxine. The father’s1 j6 B4 ^7 M$ b1 t! P
height was 6 feet, and he went through a somewhat
. ]9 B* E- O4 K$ \5 Bearly puberty and had stopped growing by age 14.$ N1 h' u/ Y i. H: y
The father denied taking any other medication. The
% {+ D) i2 L- e& }# V! ?1 u Vchild’s mother was in good health. Her menarche0 v0 p) }1 H7 d7 `4 \
was at 11 years of age, and her height was at 5 feet
: d$ n: b. f, f) v( M8 P5 inches. There was no other family history of pre- i* W1 ?( Y( a" |2 n
cocious sexual development in the first-degree rela-
0 m' t- ^. d$ [! ~8 `9 { W( Gtives. There were no siblings.
% j# O7 {0 |9 J' _/ APhysical Examination8 p3 B* b4 r! G& ~
The physical examination revealed a very active,
- z6 f: H9 M' ]playful, and healthy boy. The vital signs documented. [5 \1 s! m) P; b0 G- q& [
a blood pressure of 85/50 mm Hg, his length was
% D* B$ [. O) |+ k' \- r# `90 cm (>97th percentile), and his weight was 14.4 kg0 H }( C5 Y% T! x: }2 o
(also >97th percentile). The observed yearly growth
" u/ f! b4 Y3 L2 wvelocity was 30 cm (12 inches). The examination of
/ ]( `* @. j* }/ u6 jthe neck revealed no thyroid enlargement.* [9 ]; ]7 {; }) U
The genitourinary examination was remarkable for% e% m1 \6 `* E2 _7 F) _+ U- q! J
enlargement of the penis, with a stretched length of
R1 g7 o9 e- \4 V4 U8 cm and a width of 2 cm. The glans penis was very well
; [4 n& t7 G5 B2 i# }developed. The pubic hair was Tanner II, mostly around" J: p* L' R- x* H' ]
540
0 G2 c; k6 U7 K: Hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
0 u' l4 K8 F1 Athe base of the phallus and was dark and curled. The
' l+ n# v+ h, R3 ltesticular volume was prepubertal at 2 mL each.
9 N0 M3 y9 w5 W# F2 k& B7 kThe skin was moist and smooth and somewhat+ `. F' r$ c& y' w, Y6 c- \
oily. No axillary hair was noted. There were no7 O2 g3 B1 w& k; K+ D% J/ M; F7 \
abnormal skin pigmentations or café-au-lait spots.
* y( N! X0 |7 e v8 `. y: L MNeurologic evaluation showed deep tendon reflex 2+
7 D- M; ?' r: ]* k6 o/ l+ y4 ubilateral and symmetrical. There was no suggestion d1 S9 }3 ^+ E6 E7 Z3 |
of papilledema.; k; \5 h8 w6 |- e) M
Laboratory Evaluation, Z3 s2 L2 R% \, y$ v
The bone age was consistent with 28 months by+ I9 X' D) B6 z
using the standard of Greulich and Pyle at a chrono-
1 U3 Y7 S J" ]# D5 {3 Y. _logic age of 16 months (advanced).5 Chromosomal/ \' H7 }9 G: _7 j
karyotype was 46XY. The thyroid function test
9 o6 F t! N& P4 }) {showed a free T4 of 1.69 ng/dL, and thyroid stimu-; |6 m/ M4 o5 ~' ^1 O' _
lating hormone level was 1.3 µIU/mL (both normal).
6 p* I: |5 k. E s+ iThe concentrations of serum electrolytes, blood2 F+ K, A9 m+ _3 E
urea nitrogen, creatinine, and calcium all were
0 X' b- ?8 Z- ^within normal range for his age. The concentration
& ~+ X3 c3 G# m( H9 Mof serum 17-hydroxyprogesterone was 16 ng/dL
! E/ N1 ?' A8 I(normal, 3 to 90 ng/dL), androstenedione was 202 s6 `* g6 t |/ i: z: B
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
?5 x3 z( D0 ~! q, K/ c! M, @% oterone was 38 ng/dL (normal, 50 to 760 ng/dL),: m7 L7 m" G& J$ O6 t0 o) ^
desoxycorticosterone was 4.3 ng/dL (normal, 7 to
& n6 l, ^4 p9 W% q49ng/dL), 11-desoxycortisol (specific compound S)
; U; ?' e# {' L$ ^' v5 X d( ^was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
, e8 w* Y0 S5 g+ N# s7 C4 ~* {tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total9 d2 l% c+ a5 c# v' q
testosterone was 60 ng/dL (normal <3 to 10 ng/dL)," V2 V5 y8 x2 Z% \
and β-human chorionic gonadotropin was less than ?' L0 z- b1 h8 Q$ ]
5 mIU/mL (normal <5 mIU/mL). Serum follicular- [( R( w V0 N& U
stimulating hormone and leuteinizing hormone
# U) l0 b' n# V, V# O) d: F! Xconcentrations were less than 0.05 mIU/mL
; {. j( `$ o; `& a9 h(prepubertal).
8 O, e/ }0 g) x3 i* Q( d( lThe parents were notified about the laboratory' u! p% Y& W0 K0 n5 O0 Q$ I
results and were informed that all of the tests were1 J# v& w: V7 [& |4 k
normal except the testosterone level was high. The* i" N( f0 y6 U# ?- `
follow-up visit was arranged within a few weeks to6 T, U2 D3 {2 }6 Q9 ]; w, A( D: B- j
obtain testicular and abdominal sonograms; how-
( q" b, | U. @; m, e6 sever, the family did not return for 4 months.
0 j; Q# |6 N2 ^+ iPhysical examination at this time revealed that the0 U- j7 l' B) v9 g, ?% t
child had grown 2.5 cm in 4 months and had gained5 R2 e7 w. {0 j% N3 L
2 kg of weight. Physical examination remained: X7 J/ j8 f/ c) ?! I0 U; a0 o. Z
unchanged. Surprisingly, the pubic hair almost com-5 S R& V; U0 k! W
pletely disappeared except for a few vellous hairs at
+ H7 L1 K5 ?8 G2 W; Cthe base of the phallus. Testicular volume was still 2) @. X# {* I$ C7 k" X8 i$ ?
mL, and the size of the penis remained unchanged.
/ R9 v6 C9 k& MThe mother also said that the boy was no longer hav-2 f6 K+ F( Y2 |& L0 k9 k
ing frequent erections.; W2 J0 Q" r8 U* f' t" L
Both parents were again questioned about use of
1 ^7 h8 [, }- pany ointment/creams that they may have applied to0 |3 m$ B6 V7 J- N, o
the child’s skin. This time the father admitted the
* F: [, o% x, a( \. g$ d( g' v$ RTopical Testosterone Exposure / Bhowmick et al 541
/ p7 W) O% z0 c" n/ A# A- luse of testosterone gel twice daily that he was apply-" ]6 W( F2 w" W6 A) E
ing over his own shoulders, chest, and back area for6 g1 t- _, p2 t0 v+ b0 {
a year. The father also revealed he was embarrassed
# \. m- Q3 p( ?; E4 L. Xto disclose that he was using a testosterone gel pre-. C+ f3 F2 W2 _8 E# D3 b) |6 ~2 N
scribed by his family physician for decreased libido3 R, s, L0 P7 X
secondary to depression.8 \0 f5 F. t8 \' s0 a
The child slept in the same bed with parents.
; l2 @$ k" j* X5 h4 gThe father would hug the baby and hold him on his
1 P* ]5 ], p5 F" M: E1 ^chest for a considerable period of time, causing sig-8 \( ]' I+ E" N' \
nificant bare skin contact between baby and father.
h3 E" I! p& x/ FThe father also admitted that after the phone call,
# K( }7 C$ K# a: W9 v# Qwhen he learned the testosterone level in the baby7 q; D% W- G( N: [
was high, he then read the product information
# n. d, M6 b* ]# B. {packet and concluded that it was most likely the rea-0 W R! a9 S/ H5 N5 r9 g# a0 D
son for the child’s virilization. At that time, they
% ?! [# \8 p! N) C" l7 Fdecided to put the baby in a separate bed, and the$ a5 a8 K' F7 g+ y, X1 O. o6 X
father was not hugging him with bare skin and had
' l) R: V$ i$ u$ V3 J$ a" E6 qbeen using protective clothing. A repeat testosterone# t. P7 }) Q& G; L9 H0 _
test was ordered, but the family did not go to the
$ l( {$ r, b' W$ g3 hlaboratory to obtain the test.8 m/ m+ m F+ N* W0 u3 G# ?
Discussion* C" @+ J- P9 Q; d, c- n8 {
Precocious puberty in boys is defined as secondary
; o; K8 R/ M3 x* n. r! Ssexual development before 9 years of age.1,4. P$ U, q; A. @9 s' ]0 V
Precocious puberty is termed as central (true) when
" n+ u# f( [! V6 Y+ _: Eit is caused by the premature activation of hypo-9 L: u( _5 O5 l( j0 ]* @& ~
thalamic pituitary gonadal axis. CPP is more com-
2 e% |' _+ X$ |8 p. L" [ s' Amon in girls than in boys.1,3 Most boys with CPP
. i c% F) U8 Y" o' i) Zmay have a central nervous system lesion that is
+ e7 n8 Z% E9 u; N& Xresponsible for the early activation of the hypothal-" _* y" F5 J1 g6 D- r8 T
amic pituitary gonadal axis.1-3 Thus, greater empha-" T" _7 _( C. U. M, d! k% _
sis has been given to neuroradiologic imaging in
0 d, Y' z. z; C5 r, yboys with precocious puberty. In addition to viril-
& `! s4 X. t2 Q3 X( Xization, the clinical hallmark of CPP is the symmet-
, s' X) r6 C( \rical testicular growth secondary to stimulation by
: t, K, H! {! m5 P h2 u1 sgonadotropins.1,34 r8 X( T3 V4 d3 ~: O% O
Gonadotropin-independent peripheral preco-
- Z' M |. x3 _: ~cious puberty in boys also results from inappropriate* v; }6 \% T* m) G" T
androgenic stimulation from either endogenous or( J8 P) L0 M7 r. j
exogenous sources, nonpituitary gonadotropin stim-7 V8 }$ K, p* U
ulation, and rare activating mutations.3 Virilizing
. [% X! T. I: a% Scongenital adrenal hyperplasia producing excessive4 o) j& O2 e+ Z: b0 A
adrenal androgens is a common cause of precocious
7 X% w" f" B) N* k9 P' ]puberty in boys.3,45 e- V& M, Q8 Z0 E; K: \: \
The most common form of congenital adrenal
# q+ b1 M2 n$ t2 dhyperplasia is the 21-hydroxylase enzyme deficiency.+ X% l8 b' Q2 l X) W9 h3 W
The 11-β hydroxylase deficiency may also result in" e m6 ?1 d# S& T. Q
excessive adrenal androgen production, and rarely,
$ q0 K$ v3 m$ L7 }5 yan adrenal tumor may also cause adrenal androgen
; F. k) G0 \ ?* G0 l- rexcess.1,3
X9 ]& v% G/ ?* H, i+ i2 ]# {at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
1 x, Y) z+ X8 w- }& n5 m542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
* Q! `% L# F+ ]5 W v: X6 g- G% PA unique entity of male-limited gonadotropin-: f+ C+ o" {3 ~8 l
independent precocious puberty, which is also known
3 _9 B. S2 U9 ?as testotoxicosis, may cause precocious puberty at a
8 c2 ~! a6 L, Dvery young age. The physical findings in these boys
: [' e2 i3 M, y; Cwith this disorder are full pubertal development,
7 y* Y) q& x% K7 U5 L I( G# lincluding bilateral testicular growth, similar to boys* J! X/ S' L) u% V& Y1 u
with CPP. The gonadotropin levels in this disorder9 W: h8 T$ Y& H1 C, T" M
are suppressed to prepubertal levels and do not show1 c- r: M9 N1 U/ m
pubertal response of gonadotropin after gonadotropin-' q7 v' K* N8 k6 l
releasing hormone stimulation. This is a sex-linked
& M8 f M2 Z5 @: Y3 r Kautosomal dominant disorder that affects only
( v3 Q/ r" S; |. cmales; therefore, other male members of the family, e& d& Z! N1 c
may have similar precocious puberty.3
/ {7 H' ?" X* L3 C4 lIn our patient, physical examination was incon-
- b/ L, n0 t$ Csistent with true precocious puberty since his testi-
) s; c* y2 ?8 E ]1 R; ycles were prepubertal in size. However, testotoxicosis
4 J8 Y8 Z3 {" N$ Q& }was in the differential diagnosis because his father. h' g: E& M/ d
started puberty somewhat early, and occasionally," `$ v" v- a! V, m+ d
testicular enlargement is not that evident in the
) y; T( w! |3 l1 lbeginning of this process.1 In the absence of a neg-! |) a$ J+ }- K
ative initial history of androgen exposure, our
) H) ?( z- h* P/ F$ B4 v P( [) Ibiggest concern was virilizing adrenal hyperplasia, `) E2 i( k) R/ {: c9 J
either 21-hydroxylase deficiency or 11-β hydroxylase' r# b9 b2 Z, k% M/ G" S
deficiency. Those diagnoses were excluded by find-
o1 a; x+ O4 |' jing the normal level of adrenal steroids.
# O0 q6 l. I7 Y( P) a! W( J+ iThe diagnosis of exogenous androgens was strongly
" ^' V* {& E! A# E4 T* P6 msuspected in a follow-up visit after 4 months because, s: I5 R, }* v+ a
the physical examination revealed the complete disap-* M9 x1 I0 a7 l7 p
pearance of pubic hair, normal growth velocity, and% Z! W0 ?% U3 j" H8 ?8 ~( Y
decreased erections. The father admitted using a testos-
7 }) B( b3 L u, D( Eterone gel, which he concealed at first visit. He was. c* d) q8 @; h8 M! j3 _- h' o
using it rather frequently, twice a day. The Physicians’
! ?0 C4 b) f) ]. S5 D8 @; W# BDesk Reference, or package insert of this product, gel or/ G- D( P. z4 Y9 w6 j% ^
cream, cautions about dermal testosterone transfer to
. t, [7 b: _5 o, m; ]6 [+ _% Xunprotected females through direct skin exposure.& r4 I0 Q3 u8 C& [: [
Serum testosterone level was found to be 2 times the* L# \ N, s6 G6 x0 [5 J- S
baseline value in those females who were exposed to3 Y' V, p$ w* ?1 b) t
even 15 minutes of direct skin contact with their male- k& s; D6 z' b# P
partners.6 However, when a shirt covered the applica-% j5 ?- A; i+ M( _/ z
tion site, this testosterone transfer was prevented.5 \' ?9 U; L* l" _0 T$ a
Our patient’s testosterone level was 60 ng/mL,
& @$ y) W h+ Z$ bwhich was clearly high. Some studies suggest that3 Z# a8 b2 Z$ h) m5 u
dermal conversion of testosterone to dihydrotestos-
3 _1 a7 q# T C* ]/ Tterone, which is a more potent metabolite, is more
4 I* ?5 I& O7 m: \active in young children exposed to testosterone0 c0 T [( K5 @5 n+ w% n1 S
exogenously7; however, we did not measure a dihy-
! {. ?: D$ X% f/ A. Q. ^drotestosterone level in our patient. In addition to
! U% a/ b4 _. {) s1 z" x, Ovirilization, exposure to exogenous testosterone in: y$ A7 Q1 s Q- J' D7 w
children results in an increase in growth velocity and) y$ O% _; `8 d8 t! ^+ A: K
advanced bone age, as seen in our patient.0 [" ~; Y( a, N' J. Z+ o4 B
The long-term effect of androgen exposure during p) d1 k( J, [" N: a
early childhood on pubertal development and final
- w( H. K) j. }* |$ m4 c9 @: iadult height are not fully known and always remain
4 H) u- v% B/ X( qa concern. Children treated with short-term testos-8 f) O3 @: N0 D0 d- P( O0 b
terone injection or topical androgen may exhibit some; o! B3 P& p* s9 ~, t+ Z0 e
acceleration of the skeletal maturation; however, after
. ~* H3 r# A$ m3 k$ ~6 ycessation of treatment, the rate of bone maturation) c" K( d4 C/ @" q7 I. N# D) C G/ }
decelerates and gradually returns to normal.8,9
! K, E8 z9 }) K/ PThere are conflicting reports and controversy2 u1 R7 Y$ j& m7 ~+ n
over the effect of early androgen exposure on adult
. f% F% s1 K% gpenile length.10,11 Some reports suggest subnormal
& f$ p/ R, {9 u* s5 Iadult penile length, apparently because of downreg-" \" n& a1 B6 U& D8 P
ulation of androgen receptor number.10,12 However,9 P- y- J; i: X5 Q7 f
Sutherland et al13 did not find a correlation between
9 j, F" z3 p3 y0 `+ O' x9 k: uchildhood testosterone exposure and reduced adult' y- ~. S# B- L% C" V* x" g
penile length in clinical studies.8 n7 c* i5 }6 V
Nonetheless, we do not believe our patient is
- Q+ N, ~2 Q1 g6 y# s) Vgoing to experience any of the untoward effects from6 K& m: ?; w q4 B' Y
testosterone exposure as mentioned earlier because! {" i5 O& H: }" N b- D8 q
the exposure was not for a prolonged period of time.
, N( b0 \& H4 ZAlthough the bone age was advanced at the time of# h/ K4 y; m* a3 d
diagnosis, the child had a normal growth velocity at X) H* Y" J; c1 _0 y" C2 {5 y7 R7 Y
the follow-up visit. It is hoped that his final adult
; ]1 j! w+ G: zheight will not be affected.8 t5 N* k6 h: M' n
Although rarely reported, the widespread avail-
! `- Y) |% s+ ~8 T' ^* h. u$ {4 mability of androgen products in our society may
0 n2 o7 ~$ _: }- Pindeed cause more virilization in male or female9 @8 y( t/ q- d3 o5 \
children than one would realize. Exposure to andro-
/ c: ~9 w% E" p# [% sgen products must be considered and specific ques-) n( m2 K8 H5 {; d% I
tioning about the use of a testosterone product or8 `0 [5 e8 `0 B" ?9 A+ [0 }" f( h
gel should be asked of the family members during, X1 G' T/ F8 X; H- h
the evaluation of any children who present with vir-. ~& e, c B5 E6 U+ }6 a7 W. t4 Q
ilization or peripheral precocious puberty. The diag-/ h1 s3 U" H$ v/ T
nosis can be established by just a few tests and by \& g% e: q' P) w
appropriate history. The inability to obtain such a
2 [0 j( u$ ~7 X0 \# Whistory, or failure to ask the specific questions, may4 q1 d; @6 l: A7 [$ d7 F) M
result in extensive, unnecessary, and expensive
5 {$ M' _6 @/ n$ h4 Kinvestigation. The primary care physician should be
; P/ v2 f' y; W' q5 e R' v4 T" Yaware of this fact, because most of these children: j' O$ l. P( O( o7 Y, F
may initially present in their practice. The Physicians’* `0 p" C7 R: b/ J
Desk Reference and package insert should also put a. ?% T2 q7 L9 U
warning about the virilizing effect on a male or
1 i+ {5 h, l2 y9 nfemale child who might come in contact with some-
8 q4 Y- O/ ~: ~& eone using any of these products.9 d8 e, I* z9 s
References
1 M$ |, R% Q1 c J' V1. Styne DM. The testes: disorder of sexual differentiation3 M+ z" w* x" ?# z/ k; n
and puberty in the male. In: Sperling MA, ed. Pediatric6 Y5 P! L3 L& j$ c* l- W. |
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
* b4 @4 V3 ]0 ]/ e* C, E3 U2002: 565-628.
+ N3 J. l$ C( m$ H) k7 O2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
% u1 b) [) j, X* ]7 j( Ppuberty in children with tumours of the suprasellar pineal
1 M: e, T% ^( E$ F( f) X! Fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 x( {7 ^$ K1 a. G- G0 m$ t6 m
Topical Testosterone Exposure / Bhowmick et al 543
4 }6 m: g: d6 z- t. @/ mareas: organic central precocious puberty. Acta Paediatr.
) N% [% u2 }6 R- y l6 E5 V& _% N2001;90:751-756.+ z7 c3 p- d d. p1 [% Z- t' a
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
: E- ~* }/ z. o7 L; R: ePediatric Endocrinology. 4th ed. New York, NY: Marcel
1 k. y' o6 k6 `Dekker Inc; 2003:211-238.! A' ]" b: j7 V" ^
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual( |( w0 P$ e6 F2 ~$ b
development in a two-year-old boy induced by topical
# E3 E: k# h$ G* {2 [exposure to testosterone. Pediatrics. 1999;104:e23.: U6 n, t8 j3 H% ~, k2 ]
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of* F9 N8 b Z! g5 G9 L
Skeletal Development of the Hand and Wrist. 2nd ed.- a+ s% ]7 ^# T7 [/ }! Z
Stanford, CA: Stanford University Press; 1959.
) N3 Q4 y0 _/ \- @6. Physicians’ Desk Reference. Androgel 1% testosterone,( U! |& ^4 Q% D! r h! W2 O+ M# T
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
+ n0 _7 s% L9 x, S% fEconomics Company, Inc; 2004:3239-3241.
. d* Q3 b5 `. S" U$ J7. Klugo RC, Cerny JC. Response of micropenis to topical
! i6 b0 J! C1 ytestosterone and gonadotropin. J Urol. 1978;119:6 J4 B9 R# N9 `" a' H' a2 t
667-668.* `2 q# @3 f) ?4 a, o0 J9 c. k/ M
8. Guthrie RD, Smith DW, Graham CB. Testosterone
4 V/ A6 L/ k( Rtreatment for micropenis during early childhood. J Pediatr.
. G4 i# u0 q5 T* N# ^1973;83:247-252.. S1 j1 l% g8 [
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone; ?5 d/ {4 | H$ Z5 s
therapy for penile growth. Urol. 1975;6:708-710.
" a4 X a8 v$ x) _* x$ A# l10. Husmann DA, Cain MP. Microphallus: eventual phallic
( p8 u2 v' N w) j* |& x' n! ~size is dependent on the timing of androgen administra-. E* L: O/ z* Y& v4 V& ~
tion. J Urol. 1994;152:734-739.; a0 P& x/ {+ p9 w7 P5 L
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
6 J9 d, _) E6 j9 bdoes early treatment with testosterone do more harm* N5 L# P2 X4 o) R* Q$ j
than good? J Urol. 1995;154:825-829.0 g- c/ U+ ?5 H* m' W* Q) C
12. Takane KK, George FW, Wilson JD. Androgen receptor
( K5 ]' m- c5 c p7 m. Eof rat penis is down-regulated by androgen. Am J Physiol./ ?9 H% i6 q. k
1990;258:E46-E50.
- i) O% C g- j x$ T; k13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
# @( \! Z# w& w6 ~; l) z6 wof prepubertal androgen exposure on adult penile
8 j% Z- @# J! D. alength. J Urol. 1996;156:783-787. |
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