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is a significant concern for physicians. Central$ D6 p2 V8 ]+ `8 f4 M
precocious puberty (CPP), which is mediated
; m& L# `" w' b2 g$ Lthrough the hypothalamic pituitary gonadal axis, has
2 \4 N$ n- I& @& Z% f, e7 |* Xa higher incidence of organic central nervous system; J$ z" F s% [
lesions in boys.1,2 Virilization in boys, as manifested. v! h9 q8 {$ [4 R, B- R, c) h
by enlargement of the penis, development of pubic/ I8 o" x! @7 L0 B0 T- ?- x/ y
hair, and facial acne without enlargement of testi-( a6 g. @ H' w$ y- v
cles, suggests peripheral or pseudopuberty.1-3 We
# i$ _& h3 m8 y& Areport a 16-month-old boy who presented with the$ Q, w/ X3 S4 [ z
enlargement of the phallus and pubic hair develop-0 A, i+ j8 t% a# E6 W* h
ment without testicular enlargement, which was due
8 U; p/ L3 m5 ~. k4 P8 kto the unintentional exposure to androgen gel used by
+ u# E5 I* J+ [ d- a. D! {/ \* cthe father. The family initially concealed this infor-8 j& U9 L6 p& I7 K2 A
mation, resulting in an extensive work-up for this
5 _$ n# N5 u b4 e2 I) ]8 Rchild. Given the widespread and easy availability of' h+ E6 d- \% C& V
testosterone gel and cream, we believe this is proba-- t0 m0 _5 ~/ v0 ~ n+ V. X
bly more common than the rare case report in the" i1 x+ \+ g6 x1 M% c3 q5 L. O- Y
literature.4
, z) _5 }; b% `# aPatient Report
/ }- T' M- R0 J$ uA 16-month-old white child was referred to the' _: r# x& p# p- Z% A1 m
endocrine clinic by his pediatrician with the concern
/ F7 }; ]- A- C. ~0 y) oof early sexual development. His mother noticed
5 P+ w' Q z' V+ i5 D+ A" zlight colored pubic hair development when he was
1 O7 J1 O) V8 w7 T5 [, ^/ M0 PFrom the 1Division of Pediatric Endocrinology, 2University of$ }5 m/ {) ]. X7 y' u% F
South Alabama Medical Center, Mobile, Alabama.7 e6 d. ^3 k! F/ E7 K8 J
Address correspondence to: Samar K. Bhowmick, MD, FACE,
7 i6 q& l8 N8 [. S/ NProfessor of Pediatrics, University of South Alabama, College of
+ e( f9 D2 F: e+ b7 Z" F+ K; TMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;* }5 X Z9 f2 H- }. P& {
e-mail: [email protected].! S3 r0 u1 y9 a& W7 T# g/ F
about 6 to 7 months old, which progressively became$ E4 g% f, k: y9 v
darker. She was also concerned about the enlarge-
* q7 {5 o# f' Q3 _2 _1 Nment of his penis and frequent erections. The child- Y' j5 v2 q" P) g0 p" q& O9 Y( \
was the product of a full-term normal delivery, with8 D* x% W3 Z7 `6 ^- G) [/ H
a birth weight of 7 lb 14 oz, and birth length of
K, ^3 R7 z4 _" d# t c20 inches. He was breast-fed throughout the first year- ?! h# U' u5 ~. p: q7 \1 B1 v
of life and was still receiving breast milk along with
j1 [% a+ l- ^" T% m5 osolid food. He had no hospitalizations or surgery,( C, S: r; C, p# b4 O
and his psychosocial and psychomotor development
% r& l$ S6 q; b- d/ A ?7 jwas age appropriate.
) V* o3 y9 O: M% h! B6 E! _! }/ {The family history was remarkable for the father,: [) N G5 u; N" W# Q
who was diagnosed with hypothyroidism at age 16,
3 @! }# ~! `* ~* O' ]4 l$ S$ s, \% Gwhich was treated with thyroxine. The father’s/ U/ l, {% W- n2 \! w! t
height was 6 feet, and he went through a somewhat
+ k; I8 y; i, c/ p8 x* [early puberty and had stopped growing by age 14.8 M5 e1 A y' i0 y
The father denied taking any other medication. The- ~, N$ \; t+ L2 K6 {
child’s mother was in good health. Her menarche
2 K& S4 x V3 Cwas at 11 years of age, and her height was at 5 feet
* _! N$ s2 `8 {5 T5 inches. There was no other family history of pre-
4 C6 ]- z7 G1 |& ucocious sexual development in the first-degree rela-
7 {: o* h$ K7 Xtives. There were no siblings.
: t* `9 y2 y+ y1 i0 B1 C3 O( U& H* RPhysical Examination: F/ ]0 J5 p/ s I$ l. `
The physical examination revealed a very active,
* M2 l% `) l @9 \" @/ N% Splayful, and healthy boy. The vital signs documented
7 l. R5 {* _/ V/ I0 @3 F" B; Pa blood pressure of 85/50 mm Hg, his length was' O% I- ~4 u2 q
90 cm (>97th percentile), and his weight was 14.4 kg O$ ~. J! A4 K; _9 Q# ]4 N7 R' Y
(also >97th percentile). The observed yearly growth2 t2 i. L: y& a* Y6 A
velocity was 30 cm (12 inches). The examination of8 B6 f7 F0 _) F A! j" n( ^
the neck revealed no thyroid enlargement.
: m& ?# R. j [The genitourinary examination was remarkable for
?5 E1 \* s3 R: E5 Venlargement of the penis, with a stretched length of
3 w4 s6 h3 h \! _$ B$ r( J8 cm and a width of 2 cm. The glans penis was very well7 e( D. F, m* R& b+ c! Q2 s
developed. The pubic hair was Tanner II, mostly around
" t# D Y4 U# ?4 K540
/ v9 L2 k+ V7 p' hat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. l D% c7 T% P% ]7 `9 t0 C6 |
the base of the phallus and was dark and curled. The' c) { a+ m9 S& z1 _" p/ e6 \# [; H
testicular volume was prepubertal at 2 mL each.
0 u& r% X/ o2 H0 e( G: c/ FThe skin was moist and smooth and somewhat
0 v) n" L8 a8 u, }7 `oily. No axillary hair was noted. There were no
' g& `# d" l5 u3 ^6 L: M9 aabnormal skin pigmentations or café-au-lait spots.
2 q0 u) ^! g7 i5 x4 ONeurologic evaluation showed deep tendon reflex 2+- {, G2 \- }9 {$ k) P
bilateral and symmetrical. There was no suggestion9 P% p, I. D$ I& h5 n8 `6 `
of papilledema.
3 k- }& n% o$ e$ Z' QLaboratory Evaluation( l4 W( @$ s4 a4 t# n' U3 I5 l
The bone age was consistent with 28 months by! f# H$ P- U: B
using the standard of Greulich and Pyle at a chrono-0 g Z% p$ R. @: Z1 P1 q+ ?2 ~" R
logic age of 16 months (advanced).5 Chromosomal
& c4 ^) r# V1 g' Q0 c$ A" h. fkaryotype was 46XY. The thyroid function test2 F; {/ n( s4 @9 y$ O. w$ V
showed a free T4 of 1.69 ng/dL, and thyroid stimu-* T& R& b2 i0 o; T
lating hormone level was 1.3 µIU/mL (both normal).
2 ?' T8 W1 h9 s6 }The concentrations of serum electrolytes, blood
8 M% Y* `/ E3 T# a# \/ n! murea nitrogen, creatinine, and calcium all were
, s" g% I: p- m! xwithin normal range for his age. The concentration
i e0 f9 j7 k }# s& }5 e9 i' zof serum 17-hydroxyprogesterone was 16 ng/dL
. G, V" ~4 R+ J( h(normal, 3 to 90 ng/dL), androstenedione was 20: `! B9 ~) S3 w8 @7 `" \- A! b7 g1 }2 c
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-/ K: w) F- s6 y( u' \: c
terone was 38 ng/dL (normal, 50 to 760 ng/dL),+ z( P2 a7 F* J( |( S
desoxycorticosterone was 4.3 ng/dL (normal, 7 to; F- h5 b5 S* y0 ^, U) \
49ng/dL), 11-desoxycortisol (specific compound S)
6 H8 x+ G/ e5 fwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
' q- [, e0 j7 U- f* vtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
5 C# k) _7 ^. @8 c* Xtestosterone was 60 ng/dL (normal <3 to 10 ng/dL),
* ?$ D) q; V; rand β-human chorionic gonadotropin was less than5 a3 K) Q2 V: d4 t2 c
5 mIU/mL (normal <5 mIU/mL). Serum follicular
) d: O7 V4 t& G" gstimulating hormone and leuteinizing hormone; q5 A. j) _) j% V; b, t8 @) n6 T
concentrations were less than 0.05 mIU/mL0 E. q3 r2 l7 m1 V& O1 z/ F1 P5 T) _
(prepubertal).
. \+ c5 ^0 d ~7 `8 \9 aThe parents were notified about the laboratory
; Z+ M% y2 h$ K1 oresults and were informed that all of the tests were3 ^& V% \3 q; j, c3 @& {* h: O
normal except the testosterone level was high. The9 Q4 b3 z4 B+ C
follow-up visit was arranged within a few weeks to; Z% O9 d0 c4 A% q% ~' \1 u4 Q
obtain testicular and abdominal sonograms; how-9 x" K0 m/ }6 `& g
ever, the family did not return for 4 months.8 l$ o9 [8 b6 n' {7 L @
Physical examination at this time revealed that the6 U* C0 F: @6 v4 g) @
child had grown 2.5 cm in 4 months and had gained4 Q( c/ p! ~5 \/ ^; c
2 kg of weight. Physical examination remained. f# a. v$ Q. a
unchanged. Surprisingly, the pubic hair almost com-* S7 ~! F7 k2 S, a, }
pletely disappeared except for a few vellous hairs at7 }0 o5 Z, w8 c& P6 H' c
the base of the phallus. Testicular volume was still 21 F' ~% j% |; ^7 P; m, |: |
mL, and the size of the penis remained unchanged. R: V, \/ R5 d+ X4 T% y o
The mother also said that the boy was no longer hav-
2 ]/ V# o# v9 W. X: zing frequent erections.
" U" f8 @- I1 j" U- E1 mBoth parents were again questioned about use of
+ m: H. |9 V0 fany ointment/creams that they may have applied to# m- A/ k% C& s; K% t2 N/ z& Q
the child’s skin. This time the father admitted the
1 l) ]$ b9 B8 ~Topical Testosterone Exposure / Bhowmick et al 541
5 y& v3 f; S) P W- Ruse of testosterone gel twice daily that he was apply-
8 U( r7 d' \* o7 r! I1 i4 l ?* Aing over his own shoulders, chest, and back area for2 u; o O' c6 p
a year. The father also revealed he was embarrassed
/ O2 m& z. p/ y9 W7 Ato disclose that he was using a testosterone gel pre-8 a# q: ~1 ?1 v, Y V/ a
scribed by his family physician for decreased libido
) E/ \5 g7 e) J) H+ e, Z csecondary to depression.
! c: Y" P) C' e$ E, L. S9 _The child slept in the same bed with parents.
& N9 _5 q: l3 C0 D2 g7 xThe father would hug the baby and hold him on his. S( v6 o% y0 e! y' R
chest for a considerable period of time, causing sig-" A' n! W. X1 M' z; f
nificant bare skin contact between baby and father.9 h7 P, V3 `1 c2 k I+ z) B" E
The father also admitted that after the phone call,. z: Z% I9 \+ R! }
when he learned the testosterone level in the baby
P: Q( I' B$ ~1 i7 }was high, he then read the product information/ C, A4 K0 E. r, U
packet and concluded that it was most likely the rea-
, f u% w% ?: X# H# f. u% _son for the child’s virilization. At that time, they% u4 d1 g5 J. [# W. f4 A! I3 }/ Z
decided to put the baby in a separate bed, and the- N1 s. O4 X1 ?# K! X
father was not hugging him with bare skin and had
( R& m7 l9 J; i! ? ?been using protective clothing. A repeat testosterone
# \$ X, K" s! T, K; ~2 p# ttest was ordered, but the family did not go to the
/ T) e3 g. G4 C( i' ilaboratory to obtain the test.4 t/ z% W" v! p- K
Discussion
0 e' ?0 ]( j; `! ~Precocious puberty in boys is defined as secondary- j% S5 Z2 |8 T% R: N0 e
sexual development before 9 years of age.1,4$ U! m$ C! r6 G
Precocious puberty is termed as central (true) when8 W* p) g" A# u
it is caused by the premature activation of hypo-
3 C' W9 K" P# O" Ythalamic pituitary gonadal axis. CPP is more com-/ S6 r) R( L3 f4 E9 n( o" f
mon in girls than in boys.1,3 Most boys with CPP2 X# }- h9 ]' h$ G$ C! B$ U
may have a central nervous system lesion that is
1 e3 D6 r8 R) P, Fresponsible for the early activation of the hypothal-
5 X* R/ W0 a5 q5 V6 ]/ Aamic pituitary gonadal axis.1-3 Thus, greater empha-
; H6 X z! x# Y; @0 E" [& [7 Zsis has been given to neuroradiologic imaging in
! b U! {7 }" l9 Pboys with precocious puberty. In addition to viril-; D$ f( N0 C$ E- b
ization, the clinical hallmark of CPP is the symmet-
' \) [& g( n# s! X% lrical testicular growth secondary to stimulation by
! o4 x, e% I: n6 ~2 i& \gonadotropins.1,35 e4 y9 G3 G( n& h# I }
Gonadotropin-independent peripheral preco-
$ W! t2 I* ~4 l4 [7 N5 }7 [5 Kcious puberty in boys also results from inappropriate3 q" s3 P) I" ~+ [$ U" \
androgenic stimulation from either endogenous or! k& W$ ~4 |) O& [0 ]( t9 b
exogenous sources, nonpituitary gonadotropin stim-
* e9 C# g+ Z4 \8 |0 Nulation, and rare activating mutations.3 Virilizing
. E7 A$ d* \" s! v4 _, wcongenital adrenal hyperplasia producing excessive
2 l* x$ I( L- _0 E, |1 ^adrenal androgens is a common cause of precocious- Y' F) r" {( o, u! N) i
puberty in boys.3,40 H) d! H& M% b2 c1 a9 c$ X
The most common form of congenital adrenal
8 F8 K# h- d8 k4 G7 {hyperplasia is the 21-hydroxylase enzyme deficiency.
2 X' M" b# Y6 o' Q7 E9 Y; GThe 11-β hydroxylase deficiency may also result in
! x6 v+ i J8 [excessive adrenal androgen production, and rarely,+ x% w* U' Q8 c
an adrenal tumor may also cause adrenal androgen
. M( s3 p+ G( uexcess.1,33 q% r2 v& A6 a, X- t1 ~
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
* r5 K8 {2 J1 ?- J542 Clinical Pediatrics / Vol. 46, No. 6, July 20077 f& L N1 ?: [5 _: |6 `
A unique entity of male-limited gonadotropin-1 E7 F% v1 ^ P9 I
independent precocious puberty, which is also known
8 c0 H" @& q- A% w _! Pas testotoxicosis, may cause precocious puberty at a+ x" B5 e0 o3 L, e Z
very young age. The physical findings in these boys
( k O5 d, `' T! kwith this disorder are full pubertal development,7 q9 K) K- y* Y. z$ r( Q0 c% n. B
including bilateral testicular growth, similar to boys& |! L8 r& Q; R* Z7 A9 t9 ^
with CPP. The gonadotropin levels in this disorder+ W2 }( B$ g" d, V+ F0 r
are suppressed to prepubertal levels and do not show; l. I2 G! l" j* z, x+ t
pubertal response of gonadotropin after gonadotropin-9 x: ?7 @9 g+ `% N! g' w
releasing hormone stimulation. This is a sex-linked8 T, V9 \& O% S$ a, H" h
autosomal dominant disorder that affects only5 s. v2 u, k; _
males; therefore, other male members of the family
* ?6 E. U& z' c q: gmay have similar precocious puberty.3! s& a: q) D; B: {
In our patient, physical examination was incon-% Z8 R0 C3 d1 A. U) N8 z: W
sistent with true precocious puberty since his testi-8 w% X& z* Q6 l2 \& L, L8 B- u; u9 x
cles were prepubertal in size. However, testotoxicosis
+ }* J# s7 A1 B8 Zwas in the differential diagnosis because his father3 |9 i2 N1 N1 E5 `
started puberty somewhat early, and occasionally,9 r, k. Y& a# {) ?( v
testicular enlargement is not that evident in the8 Q$ i6 e; T+ L
beginning of this process.1 In the absence of a neg-
9 A% N9 E8 I, N) bative initial history of androgen exposure, our
0 K8 Q1 X: f- ?' x7 Hbiggest concern was virilizing adrenal hyperplasia,8 H0 @9 H6 X! |) ^9 I F7 B% E
either 21-hydroxylase deficiency or 11-β hydroxylase
0 b9 S; f4 @0 Z" ~( L- D9 y9 Odeficiency. Those diagnoses were excluded by find-! K9 S1 S; o! J8 G- A& a/ K
ing the normal level of adrenal steroids.; U9 ` y) Y+ N3 j
The diagnosis of exogenous androgens was strongly
) J* J8 K: z2 `/ k, {5 o% K& m: ~suspected in a follow-up visit after 4 months because
! o$ Y& p5 O) X: Cthe physical examination revealed the complete disap-6 U" n5 e. v- \7 n* w9 l% ?
pearance of pubic hair, normal growth velocity, and: I0 n- g3 v F) }7 Z) O: F$ k
decreased erections. The father admitted using a testos-( p7 j0 Q4 o1 Q7 _$ C' z
terone gel, which he concealed at first visit. He was3 Z) h1 l, K3 G( ?* ~6 }2 m* k0 l
using it rather frequently, twice a day. The Physicians’
3 t6 e, k. X% p J2 \& [Desk Reference, or package insert of this product, gel or' ~1 y6 r5 x. \, O
cream, cautions about dermal testosterone transfer to
, C: `3 k& {# N3 d6 Z8 t5 l8 y* X4 X8 vunprotected females through direct skin exposure.
+ r/ i0 G* f. t9 z) M* ^5 _Serum testosterone level was found to be 2 times the
$ b' Z( Q9 ?! e/ q) f$ |& ibaseline value in those females who were exposed to
* ^( ]9 F5 Y7 S- J3 p; B6 I% d" I$ |- Keven 15 minutes of direct skin contact with their male
) }: @3 \. ^ x; S. Kpartners.6 However, when a shirt covered the applica-8 l- i- }6 j) | u3 L9 |7 O
tion site, this testosterone transfer was prevented.
! N i4 ~: {" M5 gOur patient’s testosterone level was 60 ng/mL, K- b3 Q3 J' `& F3 F
which was clearly high. Some studies suggest that1 S" ?2 [3 E8 V/ R
dermal conversion of testosterone to dihydrotestos- z- S1 g2 b U& z7 h
terone, which is a more potent metabolite, is more
7 |* P0 ?6 Y0 J) v9 R& g% H6 Yactive in young children exposed to testosterone
' S2 ?, R! ]+ Z5 i; w' ]0 u4 o/ Fexogenously7; however, we did not measure a dihy-4 b* x2 c9 O4 A# c: I& Q
drotestosterone level in our patient. In addition to
1 k* K# E) S0 T6 G N* g& |virilization, exposure to exogenous testosterone in O4 ]% t0 y( b
children results in an increase in growth velocity and
( X- \$ r4 ^7 E; V+ P7 I6 ]advanced bone age, as seen in our patient.
- W0 {5 W- t* p0 I3 Z6 QThe long-term effect of androgen exposure during
0 ^( v3 o# Z: Z( q6 A* u, Dearly childhood on pubertal development and final" j3 I( g7 {. W0 R" G
adult height are not fully known and always remain d& ?! Y4 u" `
a concern. Children treated with short-term testos-
, `( G+ v" v1 s- hterone injection or topical androgen may exhibit some# x% E6 I* l/ z2 z2 P
acceleration of the skeletal maturation; however, after: B8 O: X- N6 g! I4 |
cessation of treatment, the rate of bone maturation
& d* i, @$ Y( f' adecelerates and gradually returns to normal.8,9% f; F8 T/ n! s( N6 W9 i
There are conflicting reports and controversy3 n) A/ J' q0 r& X1 t) S' s- ~
over the effect of early androgen exposure on adult- k5 n# W2 w5 f, }! _
penile length.10,11 Some reports suggest subnormal4 P' C' B! A, t8 c% n
adult penile length, apparently because of downreg-
' v5 Q6 p: `! r/ Q3 b; yulation of androgen receptor number.10,12 However,& O% H5 U* I' Q
Sutherland et al13 did not find a correlation between/ G! t L3 }, [! R+ y
childhood testosterone exposure and reduced adult
5 {: i4 Z. ~/ K: i( H7 dpenile length in clinical studies.8 z/ ^* q/ u$ Z
Nonetheless, we do not believe our patient is; p/ @. Z4 i' |' Y0 s
going to experience any of the untoward effects from
5 H5 ^! `' T) e- G) U" O% q; Wtestosterone exposure as mentioned earlier because* |0 c6 u5 {# y3 S" D6 f; J- P2 r
the exposure was not for a prolonged period of time.9 t$ t' B: ?# R' ]& J( E/ r/ B
Although the bone age was advanced at the time of" R. Z; `4 R4 z/ G( w B
diagnosis, the child had a normal growth velocity at
2 [" f7 m( b1 I" Dthe follow-up visit. It is hoped that his final adult' i2 z: e- M; s: l, I8 d1 Z# V
height will not be affected.
( ^% r* }. E( g% z( K8 \" ZAlthough rarely reported, the widespread avail-: R2 E9 k* m9 I( _
ability of androgen products in our society may
4 }+ A# I, E5 Q% z7 D4 A! bindeed cause more virilization in male or female
) u4 \& Z2 p& O* {& M Kchildren than one would realize. Exposure to andro-
0 H; Y" F: E) C& A. n7 ngen products must be considered and specific ques-2 F( d; I r3 d" L( I
tioning about the use of a testosterone product or
6 G- K3 ]/ L8 r$ [1 V5 Lgel should be asked of the family members during# Q+ U. p; p! i& X( U
the evaluation of any children who present with vir-* @8 w+ ^, s. [' m$ b' E
ilization or peripheral precocious puberty. The diag-
. l. e5 Y1 J5 ^& k% S- {( Lnosis can be established by just a few tests and by
4 h' Z! P0 F2 |" F Q/ iappropriate history. The inability to obtain such a' s. O- |+ m$ Z3 j/ e2 d4 e# H+ d
history, or failure to ask the specific questions, may
9 u/ u( X% J2 @3 w6 G) d. x2 P7 v* @. Yresult in extensive, unnecessary, and expensive
$ K" B% Z& P6 N6 _8 Zinvestigation. The primary care physician should be; t+ \$ {2 p& x2 s/ K) e* |8 d
aware of this fact, because most of these children
0 q$ u# S2 k; T- }" vmay initially present in their practice. The Physicians’
! _& ?% E0 M! p6 |. tDesk Reference and package insert should also put a
! \7 Q: C' C# ^5 X* B: xwarning about the virilizing effect on a male or' i; R# S0 V5 O' f4 Q! V
female child who might come in contact with some-
9 Q' M% y, F6 ]# {& Qone using any of these products.
. m* n7 Y9 X+ ~: a; IReferences2 z& W' Q5 ~: }' \* M( ], s7 q3 p
1. Styne DM. The testes: disorder of sexual differentiation# f9 x/ z2 c' j8 _4 v7 a
and puberty in the male. In: Sperling MA, ed. Pediatric. ?8 L1 h. ? t) o) Q
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
& S( |; s+ u! c: N: C2002: 565-628.( I; I4 r1 P. Y# b/ G
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious! |6 s9 B, p+ q* d1 O% m( R/ ?
puberty in children with tumours of the suprasellar pineal/ O; F5 H/ K+ F! u# g9 ]$ n3 B
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from. S% l6 L3 j) Z2 h
Topical Testosterone Exposure / Bhowmick et al 543
6 R) O8 B! r8 Y0 C8 k4 Vareas: organic central precocious puberty. Acta Paediatr.
: i+ z: R) t$ a& H2001;90:751-756.
* m- L1 V3 I1 k0 z. [% T3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.4 G" ?( {2 b4 V! X/ |$ U. `
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
$ ^7 U& K M2 [/ DDekker Inc; 2003:211-238.% z! p1 l+ P" p" c6 `
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
+ i; f: i# d1 ?% M0 {6 ^" Ldevelopment in a two-year-old boy induced by topical* E( s9 t+ U& r( @1 O: I( @
exposure to testosterone. Pediatrics. 1999;104:e23.9 v/ c5 Z d* X+ ?6 E: K
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
: ?# a2 ^' w; u( p2 M& ]4 X+ xSkeletal Development of the Hand and Wrist. 2nd ed.+ `* y& T8 f; w" \3 u5 `
Stanford, CA: Stanford University Press; 1959.
. {% t, J1 O1 d2 ]: b6 B7 O6. Physicians’ Desk Reference. Androgel 1% testosterone,
; S$ _: \3 e! W- E! [* pUnimed Pharmaceutical Inc. Montvale, NJ: Medical
' |0 b* Z( d& x4 N! DEconomics Company, Inc; 2004:3239-3241.
3 H. F) Y3 Q3 H" @9 H% P7. Klugo RC, Cerny JC. Response of micropenis to topical
1 Q9 U2 I3 ~! k$ { F5 _) q Ntestosterone and gonadotropin. J Urol. 1978;119:
/ G3 s2 G0 Z5 X; X667-668.$ a2 X; Q' {& j% K7 H
8. Guthrie RD, Smith DW, Graham CB. Testosterone
/ ~; L/ F" R- `+ J' w) A3 r, d) ktreatment for micropenis during early childhood. J Pediatr.
1 h- f/ D/ u8 P% F2 W5 p1973;83:247-252.
- n+ `8 ]; X. O, s8 H/ Q+ f9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone" T& J* F6 F8 z& |; ]! h
therapy for penile growth. Urol. 1975;6:708-710.. H# L2 r$ E) y( r- f5 p p& P! R: o
10. Husmann DA, Cain MP. Microphallus: eventual phallic8 L/ [' C* ~7 K6 ~0 W
size is dependent on the timing of androgen administra-, T8 _% g# q' \& U# C; n( a/ \+ t
tion. J Urol. 1994;152:734-739.
6 J' t1 q3 L" q. Z1 t4 v6 h11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
/ N+ b6 I: f" u5 `( g; y/ Idoes early treatment with testosterone do more harm
! ~$ u/ ]& O, W# H7 @& Gthan good? J Urol. 1995;154:825-829.3 q2 Q. \( g0 k) G ]( @! j& ^
12. Takane KK, George FW, Wilson JD. Androgen receptor
$ Y% E" W* r: D1 Dof rat penis is down-regulated by androgen. Am J Physiol./ b7 l/ O1 o, g7 a
1990;258:E46-E50.& Q; P! V& X- Z) G
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect5 X6 o6 x$ Y, T% d1 p' }
of prepubertal androgen exposure on adult penile' V8 O* c8 w' A, n. s
length. J Urol. 1996;156:783-787. |
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