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is a significant concern for physicians. Central
9 ]2 O7 h# i9 z9 }& bprecocious puberty (CPP), which is mediated
+ b/ F! {% B8 O* wthrough the hypothalamic pituitary gonadal axis, has
# T7 K: i6 ?+ R7 f4 K p( ja higher incidence of organic central nervous system# z) }0 I M; Z7 C9 i
lesions in boys.1,2 Virilization in boys, as manifested
& V, ~: G% x" }+ j3 D( A9 Z6 u& tby enlargement of the penis, development of pubic$ t: U# v1 X! _; t+ @# z! l+ c
hair, and facial acne without enlargement of testi-
" G9 _# h0 x0 i1 u) Jcles, suggests peripheral or pseudopuberty.1-3 We
+ _2 d5 m& {+ t/ m$ u0 yreport a 16-month-old boy who presented with the4 T( [1 g+ y( `- ?! `
enlargement of the phallus and pubic hair develop-
7 w- L6 }; `* r6 m! A9 ^/ L5 Iment without testicular enlargement, which was due
" Z" u# C4 Y: o1 J: \* h( R) |4 j% bto the unintentional exposure to androgen gel used by
# l& u x* w% _ I8 \% jthe father. The family initially concealed this infor-
0 @; ~ ~4 a* T; Dmation, resulting in an extensive work-up for this; Z- Y* L6 `( _! f- T/ \# y
child. Given the widespread and easy availability of2 o9 P; E0 @! t. B: a) |% u* V
testosterone gel and cream, we believe this is proba-
B$ B t6 B8 s/ |0 @+ D# Sbly more common than the rare case report in the
8 R1 G& J1 k+ F3 Zliterature.42 g3 X) w# p$ [+ [
Patient Report
4 N& Z( p2 }& o, \A 16-month-old white child was referred to the1 z7 O+ k; v! o( B
endocrine clinic by his pediatrician with the concern
0 R7 p2 e8 _: n7 V$ Aof early sexual development. His mother noticed0 J$ B: _' T- n0 ]
light colored pubic hair development when he was
8 x4 I- m2 t* l, {2 Z8 G1 ~8 m, QFrom the 1Division of Pediatric Endocrinology, 2University of5 O+ S7 Z# x5 {1 e) J t. |, p
South Alabama Medical Center, Mobile, Alabama.3 H$ B1 W3 [& r& S- g
Address correspondence to: Samar K. Bhowmick, MD, FACE,! N2 R9 E& f8 h5 J
Professor of Pediatrics, University of South Alabama, College of
9 U; E& O S% k' p. KMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;& ]3 `$ q, U7 n: F
e-mail: [email protected].
$ K7 _: _& X; [# L) N' D7 Eabout 6 to 7 months old, which progressively became
n- ^3 _4 P( ^& Gdarker. She was also concerned about the enlarge-% d$ I' P3 g+ J) ]5 y9 x* W" Z
ment of his penis and frequent erections. The child
* T1 G4 c8 W' O0 ]9 Kwas the product of a full-term normal delivery, with) I* D( f. _ V- ^
a birth weight of 7 lb 14 oz, and birth length of
& m( |' a6 f8 A5 x1 Q, N8 n' R) B20 inches. He was breast-fed throughout the first year
0 A0 W7 @' u2 X% X! ]6 k# Bof life and was still receiving breast milk along with! ]+ H% e7 P) r: ?
solid food. He had no hospitalizations or surgery,3 ]# P+ A* r3 e* O5 s7 p
and his psychosocial and psychomotor development: O! R3 ]2 B( ?. {4 R. i% g
was age appropriate.4 w% ^4 D6 \/ m* D
The family history was remarkable for the father,$ r% H/ n. O' H* ?4 v6 f
who was diagnosed with hypothyroidism at age 16,% P% j- @2 T* |# n* z0 b
which was treated with thyroxine. The father’s0 M4 n X5 ?8 m$ @6 b% t+ ]
height was 6 feet, and he went through a somewhat
p+ `4 I* J! Fearly puberty and had stopped growing by age 14.
" O" `/ a4 H7 x1 fThe father denied taking any other medication. The; o. M. c- }; |" W( s
child’s mother was in good health. Her menarche
: W+ Z5 l: k# v$ N7 O. qwas at 11 years of age, and her height was at 5 feet1 P) F# d7 `) |' Y9 C, l# E X
5 inches. There was no other family history of pre-
' n+ p& P H! `& l& M! h$ Icocious sexual development in the first-degree rela-
) D) O) Q1 Q3 n3 W+ u: Dtives. There were no siblings.0 A! ~" V, [& M$ H" A/ [
Physical Examination
+ _* y2 r& O/ h( U' _ gThe physical examination revealed a very active, H3 Q1 r) X. y2 k: H, c
playful, and healthy boy. The vital signs documented1 x# g% I, K* }! o2 b; i. \1 `! t
a blood pressure of 85/50 mm Hg, his length was6 b) P5 r) @! J3 T. {. M
90 cm (>97th percentile), and his weight was 14.4 kg' [$ p W9 [" A0 ^7 F2 P
(also >97th percentile). The observed yearly growth
, d. ]; H6 Z# v& b9 Xvelocity was 30 cm (12 inches). The examination of \: M/ {, R! {9 \' r
the neck revealed no thyroid enlargement.6 R' B9 G, l$ X% D
The genitourinary examination was remarkable for# E8 w3 Y6 G4 M, t# _, u! p7 I1 c
enlargement of the penis, with a stretched length of
" m+ r, M3 w' ]/ ~/ B8 cm and a width of 2 cm. The glans penis was very well
( w( H" J" y: G$ Udeveloped. The pubic hair was Tanner II, mostly around% ~( b- c1 ]5 U2 E+ y0 e
540
# q c0 K& T. ^at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
) c) i# o7 C: F4 d5 rthe base of the phallus and was dark and curled. The
/ U/ W4 f# R" }testicular volume was prepubertal at 2 mL each.0 E; w! {7 Q2 Z- j% T6 p
The skin was moist and smooth and somewhat9 V5 i0 u+ X5 D7 B5 u
oily. No axillary hair was noted. There were no
: a+ ^ L% k/ ^2 Q" Zabnormal skin pigmentations or café-au-lait spots.
- G3 G V& w" {: j% X. t5 kNeurologic evaluation showed deep tendon reflex 2+
# D! t/ A0 c: o( ubilateral and symmetrical. There was no suggestion9 Z5 |. i9 t5 }7 W; ^
of papilledema.# U: G* m6 u, l" H5 @ I9 E
Laboratory Evaluation
A3 G V" Y* K$ B- Z+ p5 hThe bone age was consistent with 28 months by, Q$ E2 d2 S: R: s
using the standard of Greulich and Pyle at a chrono-
$ n# \; I! y1 b$ l2 {logic age of 16 months (advanced).5 Chromosomal) }& d* S& h( M" ^3 `6 c
karyotype was 46XY. The thyroid function test' Z8 ~. F* K- d" f( h" B
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
& w' `, }1 J8 D, k* b% @4 Dlating hormone level was 1.3 µIU/mL (both normal).& }# n2 Y7 l: t" g, w: F& N
The concentrations of serum electrolytes, blood
7 z3 X2 i9 @' n+ V5 Nurea nitrogen, creatinine, and calcium all were0 G3 |$ x* \& L6 }- U' C
within normal range for his age. The concentration
1 `5 v6 |& a3 ?: X0 cof serum 17-hydroxyprogesterone was 16 ng/dL7 F/ v E4 l$ J7 n. u- q
(normal, 3 to 90 ng/dL), androstenedione was 20
$ F! A5 _6 j& e$ ~3 a; x- a; K; g f4 lng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
+ {8 p" u7 D4 _+ Vterone was 38 ng/dL (normal, 50 to 760 ng/dL),& Z# _6 E, o' c* |
desoxycorticosterone was 4.3 ng/dL (normal, 7 to% z7 p8 Q- K5 Q( R( m
49ng/dL), 11-desoxycortisol (specific compound S)( a" g+ R* ], m; d {5 o
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-" @& f/ {, B5 W$ C e4 F0 c5 @
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total, P l0 ]" s. i
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
4 D+ C, z9 B3 [3 {+ l+ E- Gand β-human chorionic gonadotropin was less than
1 h! {' J, [9 k3 K+ R' J# w5 mIU/mL (normal <5 mIU/mL). Serum follicular
" E, Q! A# J" I0 L( F0 \2 Ystimulating hormone and leuteinizing hormone, c$ z4 m: t. \1 K8 R6 Q6 L* I
concentrations were less than 0.05 mIU/mL4 Z& Z1 e9 k3 F+ C
(prepubertal).* H/ I% d4 l# N/ ~; u) w0 \% j
The parents were notified about the laboratory
+ o% a e; w t; E2 r3 kresults and were informed that all of the tests were
- w g" F& }( nnormal except the testosterone level was high. The1 q, F6 S, a& C- n2 t x6 L! e; W
follow-up visit was arranged within a few weeks to
2 K! ?+ P1 l- S2 o' Xobtain testicular and abdominal sonograms; how-
2 O h0 U" @/ c# tever, the family did not return for 4 months.
6 g7 D/ [: `# lPhysical examination at this time revealed that the5 z$ ~' S* z: `8 c/ l. B+ m
child had grown 2.5 cm in 4 months and had gained
3 j+ g6 Z9 L7 c2 \2 kg of weight. Physical examination remained
: e0 N( Z9 v6 X& o# p( l7 dunchanged. Surprisingly, the pubic hair almost com-
0 N, m( f2 r7 @+ Upletely disappeared except for a few vellous hairs at
; A$ f: y7 ^- Z( s5 f9 P: n6 a4 Tthe base of the phallus. Testicular volume was still 2
0 s* v1 m! a( R8 j% U" p& PmL, and the size of the penis remained unchanged.; ^8 C* B* W5 v0 i, { K
The mother also said that the boy was no longer hav-+ [1 C% |- w4 U6 U5 s; a
ing frequent erections./ M( G( Y, \% \4 y) ? x
Both parents were again questioned about use of4 b4 M# i7 L! `0 m7 R, ^
any ointment/creams that they may have applied to0 a! W( V( v7 B, r, a$ z4 A
the child’s skin. This time the father admitted the. ^: ~7 }: l4 i8 K# ` h- a
Topical Testosterone Exposure / Bhowmick et al 5410 u7 w3 s2 _& C
use of testosterone gel twice daily that he was apply-
N) o \2 W$ }, y# Z+ y* F4 @ing over his own shoulders, chest, and back area for
8 ^- r+ U2 Y7 e2 ^8 sa year. The father also revealed he was embarrassed7 }# a/ w* |; c0 L3 Q3 }/ x' l
to disclose that he was using a testosterone gel pre-2 D" j- w8 Z9 _2 Q* o% s( T
scribed by his family physician for decreased libido
z# v- ^: t0 S4 I1 m( ~: s) ssecondary to depression.
4 m: S7 ~7 z! I0 p3 RThe child slept in the same bed with parents.
v$ m; W, @5 h J) ]1 zThe father would hug the baby and hold him on his8 y: g% }$ ^; c o; O" Z/ w% A
chest for a considerable period of time, causing sig-
6 c7 I5 C& w! N9 ?6 x8 u0 f9 u8 c8 anificant bare skin contact between baby and father.$ t. P; t' |+ l: D
The father also admitted that after the phone call,
- i" Q, C( b% h8 p( R- rwhen he learned the testosterone level in the baby
4 A0 n1 ^; G& ~% b" k$ N8 D! h! Lwas high, he then read the product information1 z& n- a. F: h' v4 m& c. k
packet and concluded that it was most likely the rea-
) }# V, |3 L! d% l) @son for the child’s virilization. At that time, they" {! J6 E, |+ h1 Y* b
decided to put the baby in a separate bed, and the
; r4 r3 p' R& q. \8 ~6 q# y( L& N$ ]father was not hugging him with bare skin and had
* S1 z9 v! t' B0 o5 rbeen using protective clothing. A repeat testosterone
) r2 h0 _' e8 rtest was ordered, but the family did not go to the
: D! E4 n& ?1 R# Hlaboratory to obtain the test.$ j$ u6 T" P* y5 q: [
Discussion* S/ @3 i" V3 V8 O' T. z
Precocious puberty in boys is defined as secondary
8 g; X7 U6 t; b$ L x' A; Qsexual development before 9 years of age.1,47 Q9 D5 X2 v- k# a. B: U/ G
Precocious puberty is termed as central (true) when
* P8 W o' Z$ D0 K, bit is caused by the premature activation of hypo-( |$ u( R! c2 }! \- K4 o
thalamic pituitary gonadal axis. CPP is more com-! a/ l; E+ J% g# V0 v) [, B
mon in girls than in boys.1,3 Most boys with CPP$ D$ a7 h5 L" X/ t
may have a central nervous system lesion that is
% |% n) B( D" q% t x& H) Yresponsible for the early activation of the hypothal-0 x8 u0 L$ W* C# e( `5 J
amic pituitary gonadal axis.1-3 Thus, greater empha-2 q4 n7 g4 b4 [0 k$ l5 `
sis has been given to neuroradiologic imaging in
) K5 V! L6 J e# ^* G: [* u- aboys with precocious puberty. In addition to viril-
! O+ y1 ]* m+ ?" ^2 Eization, the clinical hallmark of CPP is the symmet-
" {" \: t/ D$ f0 p' v' Y/ B( d5 Xrical testicular growth secondary to stimulation by
5 p2 h2 @* P: F" z9 Tgonadotropins.1,33 x8 Z3 ?" D. g% A
Gonadotropin-independent peripheral preco-4 {6 C7 Y, [# i5 l- ~+ l
cious puberty in boys also results from inappropriate" o* a8 @# u) ^! V
androgenic stimulation from either endogenous or
$ t* X+ j- E1 Y( Sexogenous sources, nonpituitary gonadotropin stim-
0 X+ c' a9 c( x' @ulation, and rare activating mutations.3 Virilizing7 ~% r7 v8 y9 Y% e
congenital adrenal hyperplasia producing excessive
1 N$ `) D4 A' {% w4 Yadrenal androgens is a common cause of precocious
; V- F( s& j# o0 c' H! Tpuberty in boys.3,4! ]; s6 u4 F7 A
The most common form of congenital adrenal
6 f8 U7 h. J6 W) g0 _hyperplasia is the 21-hydroxylase enzyme deficiency.
- V* v0 S- z B6 g* g: \The 11-β hydroxylase deficiency may also result in& d" G; f/ W+ w% l+ L
excessive adrenal androgen production, and rarely,
; q! a* ]( `! h; c1 J8 M; ^an adrenal tumor may also cause adrenal androgen" n& f' v8 d+ `3 C' O% V6 k* p
excess.1,3" p7 {& f' ~# R7 i! O
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
3 }4 t# U# I5 \! X( c% w542 Clinical Pediatrics / Vol. 46, No. 6, July 20070 t2 Q8 |& z0 b* c/ N
A unique entity of male-limited gonadotropin-( W& K" {- V4 {: w# ?, ?& y6 a
independent precocious puberty, which is also known
c( Z0 L" I9 N* x% j2 ~ Las testotoxicosis, may cause precocious puberty at a
9 |! x" r3 r' z8 B' u/ i6 {very young age. The physical findings in these boys
8 c4 W/ n9 n2 Z& s6 h/ {3 kwith this disorder are full pubertal development,
" |8 c- O, W& S/ V$ C) _$ q9 Fincluding bilateral testicular growth, similar to boys
w; F4 D3 X( ~- U: ?, ]2 qwith CPP. The gonadotropin levels in this disorder% }1 o0 K8 |" _4 _0 i- ~1 Z# \0 r
are suppressed to prepubertal levels and do not show9 Z$ o, A$ m3 a7 s8 [( L) m1 b
pubertal response of gonadotropin after gonadotropin-( d3 c: a+ r4 d9 N& D% N
releasing hormone stimulation. This is a sex-linked+ L) |( n8 u, n7 e: ~) N; R4 C
autosomal dominant disorder that affects only
( I8 o9 H0 z" ]0 G/ Smales; therefore, other male members of the family# z3 ?* [ e5 j7 N3 M
may have similar precocious puberty.3
! \& }+ d3 P. U4 g9 n7 `In our patient, physical examination was incon-% U8 C6 t. z8 G! q) ~9 J* {- L ~
sistent with true precocious puberty since his testi-/ x( ^3 }" A# F5 K. b( C
cles were prepubertal in size. However, testotoxicosis( }% }# ~5 p) @- O$ E
was in the differential diagnosis because his father
9 I! k" w1 k: E0 Y5 v2 `started puberty somewhat early, and occasionally," m! ]- G4 ~; p* }, x, P) L
testicular enlargement is not that evident in the
: k/ k4 N! O1 G, c. n8 n, ^1 Ibeginning of this process.1 In the absence of a neg-
- ~: T/ |$ \; d* ]( Tative initial history of androgen exposure, our
4 M' \& V& c; X/ j y6 F! H9 j7 cbiggest concern was virilizing adrenal hyperplasia,
. r9 ?5 n5 J2 heither 21-hydroxylase deficiency or 11-β hydroxylase8 g2 ^5 o! z+ L, S
deficiency. Those diagnoses were excluded by find-# e: s# d2 f {: [
ing the normal level of adrenal steroids.
& c' |" j& ]7 O8 yThe diagnosis of exogenous androgens was strongly4 A" t% y2 @1 ^0 \
suspected in a follow-up visit after 4 months because
" n9 S1 d0 X. Nthe physical examination revealed the complete disap-
7 ?, v. k) x/ ?/ M' n2 Ypearance of pubic hair, normal growth velocity, and
# @( t7 i- z$ Z4 y$ P& v! ddecreased erections. The father admitted using a testos-
, ^, j% \, x% lterone gel, which he concealed at first visit. He was
! o. p/ |1 D, A. busing it rather frequently, twice a day. The Physicians’
- J2 I" f& k6 L/ N' u& kDesk Reference, or package insert of this product, gel or% {( C$ u, G5 t; U% {9 f. l
cream, cautions about dermal testosterone transfer to/ N( h7 k. D' W8 J# r
unprotected females through direct skin exposure.
1 q+ Y+ U- r+ h4 qSerum testosterone level was found to be 2 times the
- D. e4 ^5 {4 l1 Kbaseline value in those females who were exposed to
8 W% a: r$ S7 ]7 Aeven 15 minutes of direct skin contact with their male
) c3 a# A" }( l% C$ {1 xpartners.6 However, when a shirt covered the applica-
( [2 i/ _* V9 q5 ution site, this testosterone transfer was prevented.
# ~$ \* x6 k! X' E+ x9 I: Y( COur patient’s testosterone level was 60 ng/mL,0 U2 f" S$ ]7 P0 q8 C! m
which was clearly high. Some studies suggest that$ S( u2 }1 m1 \ u6 I2 w) V
dermal conversion of testosterone to dihydrotestos-
6 v6 {' [9 ~% nterone, which is a more potent metabolite, is more
7 G n% m2 d5 T9 H" O: l5 |6 E* Sactive in young children exposed to testosterone
. {, g' ~2 s: k+ [/ J- kexogenously7; however, we did not measure a dihy-
+ F6 d2 }8 c' K, K; Tdrotestosterone level in our patient. In addition to
% c* h$ ]$ l' q/ Rvirilization, exposure to exogenous testosterone in5 G/ a3 o$ \/ L. M
children results in an increase in growth velocity and
; }$ c j+ H! j: X$ Z; K; J0 qadvanced bone age, as seen in our patient.
' L& W0 v0 J$ NThe long-term effect of androgen exposure during! x6 T4 v+ R1 W
early childhood on pubertal development and final* s% i" U) d- Q; H
adult height are not fully known and always remain
3 ?& c- Q" Z# ] ka concern. Children treated with short-term testos-4 Y. v A ]- |7 O8 U$ E t1 \" h2 M
terone injection or topical androgen may exhibit some
2 r6 K1 H- C" F7 |( x: j' t1 Uacceleration of the skeletal maturation; however, after
) g) J- S* p: b6 I& [cessation of treatment, the rate of bone maturation
( j: M9 ?9 U) N* b" Qdecelerates and gradually returns to normal.8,9
% H! @ j* O% n- W# C- L- l3 O* PThere are conflicting reports and controversy; N& `$ R4 V0 }% P7 ]
over the effect of early androgen exposure on adult& v* |7 o1 f, P! _2 e
penile length.10,11 Some reports suggest subnormal
4 y1 t# K& v G9 q+ ]- S9 Eadult penile length, apparently because of downreg- H9 [; l7 `. G& P8 Q, H2 ~3 Q
ulation of androgen receptor number.10,12 However,# a% ^- p' A& O
Sutherland et al13 did not find a correlation between
; f1 ]9 e- ?! U, ochildhood testosterone exposure and reduced adult
; }. j/ d! v) D1 |penile length in clinical studies.8 j. D+ c ]5 _7 f( O! W
Nonetheless, we do not believe our patient is8 r$ k' |- W5 H$ d9 y
going to experience any of the untoward effects from
1 @7 f: @% h! C" j$ U# Ztestosterone exposure as mentioned earlier because
4 u- d/ b C% J9 ^4 B- S1 dthe exposure was not for a prolonged period of time.
% _9 q9 P$ c7 E8 v/ e/ QAlthough the bone age was advanced at the time of. y3 X- Q/ I& y9 s" p
diagnosis, the child had a normal growth velocity at( t) F1 e' l) R |2 L
the follow-up visit. It is hoped that his final adult
% B1 }8 D9 N, f6 Y% C0 j0 F' Gheight will not be affected.
; w F" Y8 k) }4 KAlthough rarely reported, the widespread avail-( Y5 U, H9 D! A& E; g
ability of androgen products in our society may
1 h9 _8 I8 U' {0 Eindeed cause more virilization in male or female5 r9 j) W7 g4 M
children than one would realize. Exposure to andro-
8 Z2 \% u. `7 N' I k* J! }, ggen products must be considered and specific ques-2 ^8 P. h, y7 l7 W+ q
tioning about the use of a testosterone product or8 q' [' E7 b. L3 u5 s1 P: g
gel should be asked of the family members during3 d4 c8 {, V; `' S* s
the evaluation of any children who present with vir-' i0 u" v1 L K; `: r4 h0 J8 A
ilization or peripheral precocious puberty. The diag-- o: d9 t8 @. S* f7 K9 E$ d; U, C1 q
nosis can be established by just a few tests and by
5 m3 g% c1 q& g) Z( C; Eappropriate history. The inability to obtain such a+ j/ Y4 z) ?# P5 [3 w: k, M
history, or failure to ask the specific questions, may4 _3 f' j, C* P0 t" U
result in extensive, unnecessary, and expensive
`. x% s0 g0 i+ e* Ainvestigation. The primary care physician should be
2 |: ]2 |2 ?, [2 [3 Q7 |' [7 Uaware of this fact, because most of these children( |* q7 D ]0 b# t- G9 N5 o
may initially present in their practice. The Physicians’0 C9 ]8 j+ j' u+ n
Desk Reference and package insert should also put a
% L) e x( \0 t7 {8 b6 V0 xwarning about the virilizing effect on a male or
/ H: [# R7 V4 pfemale child who might come in contact with some-
5 ?2 \5 ^; `; f# kone using any of these products. R3 I% w/ J! H
References
: z0 ~: f" L) A: B* o7 g1. Styne DM. The testes: disorder of sexual differentiation
; g+ D J7 ^$ uand puberty in the male. In: Sperling MA, ed. Pediatric
" ~3 Q6 ?2 p: Q5 `2 _9 P; [Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;1 c; W3 x* O+ f7 y+ `/ i
2002: 565-628.7 G# C9 E$ i' x/ e. j4 h# u: T. `
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
" v' o# ~0 h: n! qpuberty in children with tumours of the suprasellar pineal+ M r/ o# M) v- e& c6 o( h
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* R+ t$ q' \% OTopical Testosterone Exposure / Bhowmick et al 543
+ ~1 f/ n$ E( x7 K; n1 Q2 t5 |areas: organic central precocious puberty. Acta Paediatr.+ l' o" `8 A8 j% l1 V: g' k, h
2001;90:751-756.' ~3 H( v' F& C+ i/ W
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
* @" F5 D, T$ o: |6 P, CPediatric Endocrinology. 4th ed. New York, NY: Marcel% t& W; c8 r% P9 K$ @
Dekker Inc; 2003:211-238.. j0 F( E5 e* o8 _
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
$ L+ u2 S. @/ Y: B8 E: Y4 I3 N. Xdevelopment in a two-year-old boy induced by topical3 N3 ?) m( h8 P2 {$ }
exposure to testosterone. Pediatrics. 1999;104:e23.
5 m4 n2 w l+ Z5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
9 W3 J8 W( M+ w6 B YSkeletal Development of the Hand and Wrist. 2nd ed.
! C' m( h) x/ VStanford, CA: Stanford University Press; 1959.: p9 Y1 H5 s( }- K
6. Physicians’ Desk Reference. Androgel 1% testosterone,
% m' K7 N6 @4 c) t( K1 J4 uUnimed Pharmaceutical Inc. Montvale, NJ: Medical
8 a; t; _ k# gEconomics Company, Inc; 2004:3239-3241., v- A2 [; C2 |. p" V
7. Klugo RC, Cerny JC. Response of micropenis to topical$ z; Q7 x) T; h3 A% F5 o
testosterone and gonadotropin. J Urol. 1978;119:- A/ m+ [* \8 e5 |0 Q
667-668.7 m% {% X. G2 a/ V- x& i" E! m! ]
8. Guthrie RD, Smith DW, Graham CB. Testosterone
* H' u. j) @; G' a8 Wtreatment for micropenis during early childhood. J Pediatr.+ N+ a' z$ K+ P9 @" A! _
1973;83:247-252.! p, W; f0 S3 X) }
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone% X2 v4 ?9 G8 E( i) F3 V0 n
therapy for penile growth. Urol. 1975;6:708-710., B, J$ m, W/ j# @' G1 R3 h
10. Husmann DA, Cain MP. Microphallus: eventual phallic( Z4 k, z* T: ]$ K: R
size is dependent on the timing of androgen administra-1 x/ j; S: `3 y( i/ k
tion. J Urol. 1994;152:734-739.
' r6 h; f' h6 u11. McMahon DR, Kramer SA, Husmann DA. Micropenis:. r7 J4 ? ]. n J
does early treatment with testosterone do more harm
& o0 w% f% W- u, Ethan good? J Urol. 1995;154:825-829.; E! U7 j$ r2 i5 n' ]& Z) t
12. Takane KK, George FW, Wilson JD. Androgen receptor
3 J7 i K* Y" [. m5 R" _, fof rat penis is down-regulated by androgen. Am J Physiol.
3 S5 V2 G4 D. q* N: X1990;258:E46-E50.
4 |3 e0 ]5 n" B7 m" w13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect* G" |1 m' r4 D" f
of prepubertal androgen exposure on adult penile0 L# H8 g P8 ~* ^# o; Y; S+ l
length. J Urol. 1996;156:783-787. |
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