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is a significant concern for physicians. Central7 t: ^$ h/ X, n* O" Y: l: }
precocious puberty (CPP), which is mediated
1 e0 E, ~5 |) |; F( Qthrough the hypothalamic pituitary gonadal axis, has
* R4 m# Q( G4 w5 j6 d+ U8 La higher incidence of organic central nervous system
( q& [) i6 ^- R, u& ilesions in boys.1,2 Virilization in boys, as manifested
, S: W9 L% r/ ?/ j, x1 }by enlargement of the penis, development of pubic3 ^/ q L, @- I) q1 r7 H- s$ m$ u
hair, and facial acne without enlargement of testi-
1 t0 H9 f' p7 I0 [/ Y2 mcles, suggests peripheral or pseudopuberty.1-3 We+ H, U7 o: a% q
report a 16-month-old boy who presented with the- k) Q$ j) J0 d) {
enlargement of the phallus and pubic hair develop-
5 f; b2 v( ~# Y5 }9 y- yment without testicular enlargement, which was due
& S% j9 H0 E4 S" }5 jto the unintentional exposure to androgen gel used by
; W% ^* U+ Q' E8 F$ W7 p" R, Othe father. The family initially concealed this infor-. S; S) \. P/ W, C
mation, resulting in an extensive work-up for this
V+ \; r) [2 }, schild. Given the widespread and easy availability of
! G, V3 F7 |+ z- @8 @testosterone gel and cream, we believe this is proba-/ [/ D8 |8 Z( z5 R
bly more common than the rare case report in the0 V# A7 J- E) X" a2 o
literature.45 a6 s5 R8 p. g
Patient Report2 i) \) `, c& t# |. a$ w; d
A 16-month-old white child was referred to the
/ W: K0 y3 ?3 ~$ \6 c; R* d f& ~endocrine clinic by his pediatrician with the concern
% Q: V. M) x! _' h4 j5 pof early sexual development. His mother noticed
0 W. |% j: \, E& s, t5 ~light colored pubic hair development when he was: s/ {. e- s2 M3 l& |
From the 1Division of Pediatric Endocrinology, 2University of2 B; B6 j" P) ~$ d8 M, D% s
South Alabama Medical Center, Mobile, Alabama.! Y+ {4 X9 o0 p9 N
Address correspondence to: Samar K. Bhowmick, MD, FACE,
3 X& `' g% ~: J L0 n0 j! ~5 P9 u* WProfessor of Pediatrics, University of South Alabama, College of
4 p9 G( e1 r3 s: H2 K+ M0 u: [Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297; a% j4 I4 y$ j
e-mail: [email protected].4 F8 T& G* s2 n
about 6 to 7 months old, which progressively became- M+ `1 f5 n! Y9 \$ m. F- `
darker. She was also concerned about the enlarge-
) Q: x$ [1 I' r/ \ c! M5 ]7 Rment of his penis and frequent erections. The child2 j) x( K6 J1 v# x5 u
was the product of a full-term normal delivery, with
, d b9 w! y$ J" p0 fa birth weight of 7 lb 14 oz, and birth length of
8 Q" }# \3 t8 H6 K3 [3 t0 n2 h20 inches. He was breast-fed throughout the first year
+ h6 n n e" }, _$ W/ j( y, ^+ [of life and was still receiving breast milk along with$ v6 `+ w9 h* v/ L- p
solid food. He had no hospitalizations or surgery," z% F) o. n+ v& B3 ?* q2 ~# ^
and his psychosocial and psychomotor development
1 X1 h( d1 Y/ W5 B& V+ ]was age appropriate.7 |' n" }# u: ~( W
The family history was remarkable for the father,
6 @- h [4 m$ D! x- w8 gwho was diagnosed with hypothyroidism at age 16,
4 g0 T2 {/ w) w9 s7 f* j" Q3 twhich was treated with thyroxine. The father’s
8 @: X9 c, y' X. ?3 xheight was 6 feet, and he went through a somewhat
% G9 a- O. Q& w$ Iearly puberty and had stopped growing by age 14. a; a0 |4 c* n4 ]/ C0 n2 B, U6 f
The father denied taking any other medication. The3 [" o3 \* e. o, D# \( w
child’s mother was in good health. Her menarche
3 S% I2 n! M; N( w" k; Qwas at 11 years of age, and her height was at 5 feet
4 ^/ m. p* { x4 E% B; w {5 inches. There was no other family history of pre-6 _; [- F' A$ L* x: {
cocious sexual development in the first-degree rela-
5 T: d6 Q% C+ c, h2 Y- j# Atives. There were no siblings.3 ^. Q9 x+ f& P/ s2 Z5 |3 O
Physical Examination
9 v% x* h1 @0 h$ u: W& rThe physical examination revealed a very active,$ B. o2 V1 |, c, M1 d
playful, and healthy boy. The vital signs documented
K6 ~& ]" }0 C) P, s4 Za blood pressure of 85/50 mm Hg, his length was
6 q* s4 z7 n7 b- m! Z- Z90 cm (>97th percentile), and his weight was 14.4 kg
7 f$ m5 a) Y9 [(also >97th percentile). The observed yearly growth
9 G4 \ r7 d# t3 P* nvelocity was 30 cm (12 inches). The examination of
/ ~ v# `1 g( @: f1 {6 w* Dthe neck revealed no thyroid enlargement.
]# s2 Z. C) D c. wThe genitourinary examination was remarkable for1 H+ M6 N, V$ Q9 K4 `
enlargement of the penis, with a stretched length of) {: C8 b) H1 I) }3 C
8 cm and a width of 2 cm. The glans penis was very well
* {# v% Z" k, U. ^* Fdeveloped. The pubic hair was Tanner II, mostly around
# S! k1 f/ u7 m8 S540
k8 u( C# S: }; Fat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from' L/ E) V/ I' w4 t% W& d
the base of the phallus and was dark and curled. The
8 Q) ]. N: D$ M$ W) c# }testicular volume was prepubertal at 2 mL each.3 Q1 d+ x8 ^' [/ N
The skin was moist and smooth and somewhat
. H$ k- ?1 R" G! b' Z8 a" _8 Hoily. No axillary hair was noted. There were no g* `) Q/ ~; G- D
abnormal skin pigmentations or café-au-lait spots.* Z# s z# c: \* d
Neurologic evaluation showed deep tendon reflex 2+
+ A3 Q4 ^$ A- `% ?5 w* ~+ sbilateral and symmetrical. There was no suggestion. @) ^; p5 ~/ K2 }! m
of papilledema.
* v, _% l3 I3 Y, ? H% ELaboratory Evaluation
% @& S W6 N- X$ ^The bone age was consistent with 28 months by% u { K) Z. y; q, f' R
using the standard of Greulich and Pyle at a chrono-
9 V( F3 E: M, C- `$ t! Qlogic age of 16 months (advanced).5 Chromosomal/ ^+ P2 X! W6 T8 k
karyotype was 46XY. The thyroid function test
: z9 S( Q. A, f- e% y4 |showed a free T4 of 1.69 ng/dL, and thyroid stimu-& I9 w2 V, K) b; y/ T" a
lating hormone level was 1.3 µIU/mL (both normal).: }: H4 `- i8 ]& i
The concentrations of serum electrolytes, blood
1 w/ i3 \, f* `- e& L/ ^* Iurea nitrogen, creatinine, and calcium all were
# Z, D7 W: P" M8 W3 z6 y& r: Y) Awithin normal range for his age. The concentration' M' e9 Q3 M# L" r. X+ }4 E( T% p
of serum 17-hydroxyprogesterone was 16 ng/dL
% F. A2 t$ M( V7 R2 a2 Z' Z+ p(normal, 3 to 90 ng/dL), androstenedione was 20
0 `. A( x, z/ G3 F E) Yng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
6 { M5 Z: P. zterone was 38 ng/dL (normal, 50 to 760 ng/dL),
& k M1 W) c5 Tdesoxycorticosterone was 4.3 ng/dL (normal, 7 to" x: K [ B$ n2 U+ |
49ng/dL), 11-desoxycortisol (specific compound S)
" F; |, G7 w h- E* Kwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
1 B. F5 H4 U0 V6 {; T& m- r$ S3 U& ]tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total
" r' T' ~: ?/ E8 [testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
0 m o+ E' Q; c6 L) S4 U* f$ sand β-human chorionic gonadotropin was less than
; A3 ^; w; [& b2 N5 mIU/mL (normal <5 mIU/mL). Serum follicular
& w/ A+ U0 m; b. V) {% Bstimulating hormone and leuteinizing hormone/ W7 M- }5 G) X7 B+ L/ {6 M
concentrations were less than 0.05 mIU/mL$ c( D, l8 f8 s% j; Q9 S* ~7 F
(prepubertal).7 l: f) k( C! q7 |$ A+ H
The parents were notified about the laboratory
; D a7 u4 M4 }* q$ s$ g0 x$ }results and were informed that all of the tests were% ^* }' Q* o2 z9 y1 U: A
normal except the testosterone level was high. The: L% g7 {- r! U. D
follow-up visit was arranged within a few weeks to/ @# x8 D# S3 E$ N$ @
obtain testicular and abdominal sonograms; how-: d6 B O- @$ P& e& k9 R6 @
ever, the family did not return for 4 months.
4 d0 \: b4 x7 Y. V1 e, jPhysical examination at this time revealed that the
7 j) v$ k1 g+ m8 P% c" Zchild had grown 2.5 cm in 4 months and had gained
9 ^* r, }; D: A2 kg of weight. Physical examination remained
3 L; Y' Q) |& l; b' Eunchanged. Surprisingly, the pubic hair almost com-; s4 h. p& Z- X7 B1 i0 p9 O- p
pletely disappeared except for a few vellous hairs at
/ Q ~# h4 p2 r2 g$ H8 i9 Y, K; bthe base of the phallus. Testicular volume was still 2- R& S0 n$ [- `1 w
mL, and the size of the penis remained unchanged.
: h( \9 n- N5 a0 X4 ^8 |' E& RThe mother also said that the boy was no longer hav-1 S" G9 _) w) e" k5 r
ing frequent erections.
( i, q9 a/ {8 M/ G2 Y( gBoth parents were again questioned about use of
+ L6 Z2 a% G/ J* b, A7 Y: W: K$ Uany ointment/creams that they may have applied to9 Z; M$ _' D6 y0 a, H; Y
the child’s skin. This time the father admitted the) d, g4 f! K/ R7 [( j
Topical Testosterone Exposure / Bhowmick et al 541
9 U: \" k. w+ \; euse of testosterone gel twice daily that he was apply-" e; S7 r) g; t, w- n, Y# _# b
ing over his own shoulders, chest, and back area for' ? O. `+ m+ B6 Z
a year. The father also revealed he was embarrassed
3 d! k; d2 H$ Tto disclose that he was using a testosterone gel pre-
# O2 ]: f7 a$ S( Cscribed by his family physician for decreased libido7 ]1 J; R7 C& U" P8 y# n' h2 T( v
secondary to depression.5 }: W5 o) L" y4 |
The child slept in the same bed with parents.& u6 r0 y8 X+ V- d# F1 A
The father would hug the baby and hold him on his
0 O! C$ r4 T: l3 gchest for a considerable period of time, causing sig-
( A9 i4 \( O- a; t2 \- Enificant bare skin contact between baby and father.
. O$ ^! H! H- k; j8 G2 fThe father also admitted that after the phone call,
- g# Y; t* ?7 }+ I2 N' Ewhen he learned the testosterone level in the baby& H" Y5 I7 E0 p6 v, w& U
was high, he then read the product information
: r" e; E9 f8 v7 \+ \% q- Ppacket and concluded that it was most likely the rea-
5 C' J/ C( q& N- T, {6 ?son for the child’s virilization. At that time, they& u/ a) r6 q1 V% m ?3 P1 f
decided to put the baby in a separate bed, and the- _4 b: J" A4 x: p/ ~) v! J
father was not hugging him with bare skin and had
4 T, _/ `$ w# U Jbeen using protective clothing. A repeat testosterone5 z! L8 P9 a9 U7 W
test was ordered, but the family did not go to the; M5 \! ~6 H# j3 ~/ q$ O9 I
laboratory to obtain the test./ M' J! b! e" Y& L8 X5 b3 A
Discussion7 K4 G. s Z& V- a
Precocious puberty in boys is defined as secondary
9 C& K$ _& X7 q7 Qsexual development before 9 years of age.1,4- l2 `& e# t/ _8 C9 L' s
Precocious puberty is termed as central (true) when, C6 ~6 r. Q7 @
it is caused by the premature activation of hypo-6 k \: i$ s8 O) X
thalamic pituitary gonadal axis. CPP is more com-
2 B+ ^- }. u" K! D. I& Vmon in girls than in boys.1,3 Most boys with CPP
7 S% v+ s' u( v; \5 ymay have a central nervous system lesion that is
: K6 X& g( u8 m* z# n4 J. Fresponsible for the early activation of the hypothal-7 u7 x$ w5 M) w( E7 M
amic pituitary gonadal axis.1-3 Thus, greater empha- {$ `* R, h+ {, ~8 X1 U" R5 M
sis has been given to neuroradiologic imaging in% ]9 w0 `& D( }1 x& N
boys with precocious puberty. In addition to viril-
; M+ z7 J% m7 a7 S$ d g9 q0 Bization, the clinical hallmark of CPP is the symmet-
- A6 i- G& O3 g9 D% jrical testicular growth secondary to stimulation by
# P. U6 N6 j) S* A- G% Q0 Jgonadotropins.1,3
6 p/ j7 w: R! K6 K% nGonadotropin-independent peripheral preco-
( d4 G/ G" W6 _& e1 I# h* Q' Ucious puberty in boys also results from inappropriate
! v' ~! d1 Y: I8 M7 f1 d Qandrogenic stimulation from either endogenous or) E8 m9 r `$ j
exogenous sources, nonpituitary gonadotropin stim-+ a$ V' M. l( K9 J: P& B: B
ulation, and rare activating mutations.3 Virilizing3 ]+ v3 W8 s7 X# t1 A
congenital adrenal hyperplasia producing excessive
% K5 Q3 f% v. N$ o0 K& @adrenal androgens is a common cause of precocious
0 V' W; ~ C/ x! jpuberty in boys.3,4
. [ b6 b. k5 q6 r6 d2 P& Q% P! }The most common form of congenital adrenal, p1 h7 V" ?% M" \8 r( M
hyperplasia is the 21-hydroxylase enzyme deficiency.1 @( j* a ?5 T: U. s7 d; S/ h7 x+ m
The 11-β hydroxylase deficiency may also result in- P: H6 i. t4 _/ n5 d. t5 A* |# X
excessive adrenal androgen production, and rarely,9 i" r' D1 [! K4 E
an adrenal tumor may also cause adrenal androgen
# O, _) V3 m, `" r0 U6 Mexcess.1,32 g1 v* N$ E/ e5 g
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from3 L3 k: |8 @/ g$ s$ L% u
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007 e( @) c( N, g3 P, l1 t
A unique entity of male-limited gonadotropin-
# h. r, k2 v& o' i1 U' b" yindependent precocious puberty, which is also known
7 G/ P- y+ ~" f, b% W' ^as testotoxicosis, may cause precocious puberty at a
9 B( `1 @/ e5 w- @0 _' zvery young age. The physical findings in these boys
" f, k L2 }1 I( y$ Xwith this disorder are full pubertal development,
6 z5 R& ?# G6 p1 `* R+ w; _: Qincluding bilateral testicular growth, similar to boys1 V5 S3 f+ c1 X
with CPP. The gonadotropin levels in this disorder
G8 O) v# t, [are suppressed to prepubertal levels and do not show. m- P/ P ~" w: ~1 U: I% v1 C
pubertal response of gonadotropin after gonadotropin-
5 T* S, |# C% ^6 C! G) Yreleasing hormone stimulation. This is a sex-linked
2 i7 L/ H9 G5 b0 Bautosomal dominant disorder that affects only
' g" j; L6 p1 M4 }1 \- z) {males; therefore, other male members of the family
/ q4 p( y/ [1 pmay have similar precocious puberty.3
! Q/ h) j3 f' U4 ^! QIn our patient, physical examination was incon-
4 a, T) H& P0 X: msistent with true precocious puberty since his testi- d$ ?/ \5 X0 |/ i3 ^
cles were prepubertal in size. However, testotoxicosis) J5 ?3 [; q% z
was in the differential diagnosis because his father
/ O. r. b2 W; P6 Q; e& [3 H vstarted puberty somewhat early, and occasionally,# _! E3 L% c. y6 e$ h- V
testicular enlargement is not that evident in the8 G! e& V) o4 R8 c' r
beginning of this process.1 In the absence of a neg-
/ X B7 P$ i- Q3 q% Pative initial history of androgen exposure, our
$ \4 t, @5 e$ c6 H6 Mbiggest concern was virilizing adrenal hyperplasia,- {: t# U, _- }2 \; v! y
either 21-hydroxylase deficiency or 11-β hydroxylase! F2 z' m% f/ \" d+ Z. b
deficiency. Those diagnoses were excluded by find-7 E1 W7 L: q( r' p g) M
ing the normal level of adrenal steroids.* C* _' @. O( M. S8 v
The diagnosis of exogenous androgens was strongly
( }8 {" H1 k. ?# b7 jsuspected in a follow-up visit after 4 months because" M( w1 Y$ c! Y& W0 q
the physical examination revealed the complete disap-: d% R; j# U. O$ F, [
pearance of pubic hair, normal growth velocity, and
# r; c& R# I9 E+ j# b0 rdecreased erections. The father admitted using a testos-# H: ]% A6 g1 z; e- c1 N8 I
terone gel, which he concealed at first visit. He was
& A2 v, s) i5 Musing it rather frequently, twice a day. The Physicians’: ~' H' `# Y c5 X" `5 V2 [
Desk Reference, or package insert of this product, gel or
& L! q; n% [. f/ B4 Icream, cautions about dermal testosterone transfer to u7 x/ J7 A. v3 ~& @6 w d$ A
unprotected females through direct skin exposure.
4 U- Y3 b- n+ }. X* iSerum testosterone level was found to be 2 times the$ t# o; Q% K6 Q8 s3 N
baseline value in those females who were exposed to C, L) R2 K- B7 T; z
even 15 minutes of direct skin contact with their male- `9 v2 s; Y6 D. C9 ], ]
partners.6 However, when a shirt covered the applica-7 b% Y) m& c* G$ @. W' _
tion site, this testosterone transfer was prevented.
8 a3 E5 u8 n3 K6 gOur patient’s testosterone level was 60 ng/mL,2 l! x! A2 n" h+ A; x" H% N
which was clearly high. Some studies suggest that
* @1 t/ o& K$ ~* T8 s% t9 p: w e+ Z5 l) ldermal conversion of testosterone to dihydrotestos-! q! \# P7 R0 V0 u+ N; |
terone, which is a more potent metabolite, is more
$ {" m! x2 b0 Z4 L; ?- dactive in young children exposed to testosterone
0 C2 \2 e( s' I Uexogenously7; however, we did not measure a dihy-
" }' @+ E4 C3 P: u- n8 y; p* M# hdrotestosterone level in our patient. In addition to
. r3 W/ v- }; v- Bvirilization, exposure to exogenous testosterone in
! _9 I0 n6 O ~$ W9 m7 qchildren results in an increase in growth velocity and
9 y& `( q1 I. i/ H" nadvanced bone age, as seen in our patient.4 ?2 {5 |) [; K
The long-term effect of androgen exposure during+ j8 T9 c/ w/ r1 S5 d; F
early childhood on pubertal development and final
" V3 [1 f- W2 M5 q* ^2 kadult height are not fully known and always remain
& Z/ A! m5 {; g o0 D/ ~a concern. Children treated with short-term testos-' E* X# z. N: S
terone injection or topical androgen may exhibit some
# j2 o( g; P" K1 c) u- Hacceleration of the skeletal maturation; however, after
& ?" p4 y: o$ }( bcessation of treatment, the rate of bone maturation. O. M T, o! P1 U* X6 S" E
decelerates and gradually returns to normal.8,9
/ j3 u9 z# D3 d( m' G. X8 jThere are conflicting reports and controversy4 v1 c% O* _& k0 Y3 _! J" |
over the effect of early androgen exposure on adult
( n! A5 d" F e! @; |9 Npenile length.10,11 Some reports suggest subnormal& K2 W. U* U0 o+ B) v
adult penile length, apparently because of downreg-, Y4 y! S6 d4 y1 M8 F8 E
ulation of androgen receptor number.10,12 However,* R+ @: j* G: m; _2 Z+ _' _3 p& ^
Sutherland et al13 did not find a correlation between: R" n+ v9 F$ o3 J$ q0 ^! `' K
childhood testosterone exposure and reduced adult. J. ~1 [+ |5 J/ r8 j( q0 |- `
penile length in clinical studies., L2 }0 D7 Z, _) @
Nonetheless, we do not believe our patient is' K8 U& s- K. J6 b4 k
going to experience any of the untoward effects from
! G: O- l: L* k$ T1 U1 `0 utestosterone exposure as mentioned earlier because5 Z" h; F3 Q8 Q/ l" K( }" F
the exposure was not for a prolonged period of time.8 @% q: ~ l0 h( u7 r+ a: |$ b
Although the bone age was advanced at the time of/ g( ^! m4 j/ w. Q" Y
diagnosis, the child had a normal growth velocity at6 _( c3 U, m* k6 u2 O
the follow-up visit. It is hoped that his final adult2 Y: b) o# b1 C9 D+ x9 G1 J6 Q
height will not be affected.8 c6 ?; e$ c9 x c7 x' z
Although rarely reported, the widespread avail-# P( }" Z4 F* n6 m
ability of androgen products in our society may, v$ t1 O1 b7 D/ _' l$ e
indeed cause more virilization in male or female5 [! J. k" y+ F* C( Z( s
children than one would realize. Exposure to andro-- N/ M% W5 W" x$ I" t" Q
gen products must be considered and specific ques-/ P% Y5 h1 Q( {/ V
tioning about the use of a testosterone product or
3 D" Y1 [% ~/ N. j/ c5 W+ K1 ]2 D! hgel should be asked of the family members during2 X& @' a/ Y2 ? h
the evaluation of any children who present with vir-
5 ]) ^* S; ^- y8 {" M" P( xilization or peripheral precocious puberty. The diag-
" ?: X% h7 [# Znosis can be established by just a few tests and by
) Z; R) D+ {5 dappropriate history. The inability to obtain such a5 t4 a, v+ g$ n! |# h; u* ~
history, or failure to ask the specific questions, may9 h/ @" O+ k7 ?$ z; l5 g# |
result in extensive, unnecessary, and expensive
0 i1 v' C- P, b2 O! y+ w ]1 ]investigation. The primary care physician should be
( ~3 F, B2 v6 O$ Z* Naware of this fact, because most of these children
! e% P# X: h" w" Pmay initially present in their practice. The Physicians’0 n8 ?6 t S# s" l% g
Desk Reference and package insert should also put a5 A2 g8 c' a3 M/ \
warning about the virilizing effect on a male or
" l% h9 c& f# J e1 Vfemale child who might come in contact with some-1 D3 {0 s A' ? T1 C- l
one using any of these products.7 B) O' ^. E4 g+ Y, t
References
: M0 v0 p6 X2 k1. Styne DM. The testes: disorder of sexual differentiation
- A* |5 S X& m& V0 s/ @! qand puberty in the male. In: Sperling MA, ed. Pediatric1 k& P" n3 Y; l$ H
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
$ \' r5 u; b8 u# R2002: 565-628.
3 ^! J2 |, Z: S: e$ f% U) J: Q2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious5 r2 Y4 F2 [0 ]; |$ k- l* X
puberty in children with tumours of the suprasellar pineal
7 _. d! q* W, L1 @, @/ dat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
4 C5 p: Q# o/ R& `Topical Testosterone Exposure / Bhowmick et al 543
% ^; T+ ?0 r2 @% n" @9 m4 x6 jareas: organic central precocious puberty. Acta Paediatr.' G; F! I# a' ^9 g' U& c
2001;90:751-756.9 {9 o" Y% n( ?4 w. L, ]0 N
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.3 o1 b- L: ~$ [0 X+ l# S2 I. O; }
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
; F+ s' Z# U" W: v) j8 G3 U/ E+ LDekker Inc; 2003:211-238.
! D' ~7 i" r+ B# J, X4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual% l' q" a! J( g
development in a two-year-old boy induced by topical2 \% E! i7 J' ~: F
exposure to testosterone. Pediatrics. 1999;104:e23.
# I+ I6 T! B% h7 o5. Greulich WW, Pyle SI, eds. Radiographic Atlas of: a3 N; C1 a. B
Skeletal Development of the Hand and Wrist. 2nd ed.
, A0 {" k# M" O0 @8 D5 h( @Stanford, CA: Stanford University Press; 1959.
1 p2 x* _2 i! D) m5 R+ s8 o V$ y! ^6. Physicians’ Desk Reference. Androgel 1% testosterone,
0 C" t2 \7 Y2 Z2 r% ~: E* UUnimed Pharmaceutical Inc. Montvale, NJ: Medical3 a. V# W! Y. |0 F" N( x2 Q' K G0 ~% P
Economics Company, Inc; 2004:3239-3241.4 l" A" W: i" L0 I# |, _% u- L
7. Klugo RC, Cerny JC. Response of micropenis to topical! R/ d, ?6 k& r, g" J) C5 l' t! V
testosterone and gonadotropin. J Urol. 1978;119:" {* L% N, P: c" d- Q! j% ^9 \% Y+ d
667-668.
! _- a D4 d; z/ N8. Guthrie RD, Smith DW, Graham CB. Testosterone
( g/ i4 A9 j" J1 I% F" @' Btreatment for micropenis during early childhood. J Pediatr.( @& R8 K. ^) P. m
1973;83:247-252.
i% _* w! K, O6 [9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
! ~* z/ i2 E9 q; a0 Ytherapy for penile growth. Urol. 1975;6:708-710.
2 U; [* I& j8 Z10. Husmann DA, Cain MP. Microphallus: eventual phallic, [/ c9 k2 j2 J# ~4 q
size is dependent on the timing of androgen administra-, d& F+ |3 @4 [6 n
tion. J Urol. 1994;152:734-739.5 T3 B* r p* {
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
" {+ q6 w$ I( p0 E$ m# l( U7 udoes early treatment with testosterone do more harm: R+ V* q, g; |% ^7 O' Q+ K
than good? J Urol. 1995;154:825-829.1 T5 b/ }5 w, r. a
12. Takane KK, George FW, Wilson JD. Androgen receptor" Q ]2 U. s+ C
of rat penis is down-regulated by androgen. Am J Physiol.6 h4 s5 U( H a/ [% m9 N; Q
1990;258:E46-E50.- p: U8 g2 Z/ t" |& y
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
" \+ K7 k4 S7 i: qof prepubertal androgen exposure on adult penile
* S& f9 ?9 H( o1 L, m% Slength. J Urol. 1996;156:783-787. |
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