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is a significant concern for physicians. Central u/ _+ D4 @' g) |5 M. E
precocious puberty (CPP), which is mediated
6 C* Q# h+ g8 w5 S( r# |$ tthrough the hypothalamic pituitary gonadal axis, has
1 u( l) _. z5 M; @: @a higher incidence of organic central nervous system, E( A, b3 H. [8 n' D( Z
lesions in boys.1,2 Virilization in boys, as manifested
1 @; d2 C7 Q+ x$ a! Kby enlargement of the penis, development of pubic, w3 c& @1 }6 u1 J9 a6 G/ s
hair, and facial acne without enlargement of testi-4 h K9 L \/ z/ c' L0 @& q
cles, suggests peripheral or pseudopuberty.1-3 We
! N( I. P& D O# Z3 U* ?; Creport a 16-month-old boy who presented with the2 j# l* C8 F. e4 S2 b7 X! P6 u% B
enlargement of the phallus and pubic hair develop-7 m) y% n0 C" s& O2 N
ment without testicular enlargement, which was due
" K1 o9 F% S# S1 C7 `% X% Mto the unintentional exposure to androgen gel used by* i' @/ O( E, k3 N2 Q
the father. The family initially concealed this infor-8 r) P l) Q( L) \6 @5 U+ B
mation, resulting in an extensive work-up for this
) ?/ `5 }6 z% G/ Schild. Given the widespread and easy availability of* ~2 }# Q: l, {# k
testosterone gel and cream, we believe this is proba-# O/ Z( U6 L6 `" f3 s4 z& u
bly more common than the rare case report in the6 @2 Z2 _1 R' A8 g& F
literature.4: }5 G3 l% ?0 B0 s
Patient Report& A3 G# _2 u5 Y
A 16-month-old white child was referred to the( L( S7 C7 y8 G, u
endocrine clinic by his pediatrician with the concern
% Z$ q0 F2 ?- g( v- I8 F& o* q; kof early sexual development. His mother noticed
/ R2 F. w) r; F8 z& b. Z( Dlight colored pubic hair development when he was8 I" G5 p* R8 \$ M
From the 1Division of Pediatric Endocrinology, 2University of8 k w0 x3 Z1 `: J+ l8 E- y
South Alabama Medical Center, Mobile, Alabama.
: }: E0 s" d9 x' a3 L! n6 lAddress correspondence to: Samar K. Bhowmick, MD, FACE,
# D s# J% V0 w- FProfessor of Pediatrics, University of South Alabama, College of
0 P0 v: g4 _" X$ w/ `! n$ kMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;! M8 z; h9 m$ w' E* ?% W
e-mail: [email protected].' a& k" S# t) |9 `* ?4 S- ?
about 6 to 7 months old, which progressively became2 ~ d- r. k/ s: a N7 v
darker. She was also concerned about the enlarge-1 C' E) b- ?2 p& T: Q9 x
ment of his penis and frequent erections. The child
9 |% W- ^5 T* @- [9 Z% S$ Y( T5 c# Fwas the product of a full-term normal delivery, with$ @7 \- J5 s( C* B
a birth weight of 7 lb 14 oz, and birth length of! H: L7 V# P* Z0 f
20 inches. He was breast-fed throughout the first year$ I0 Q, I9 ]3 p0 |
of life and was still receiving breast milk along with: ?+ V& ?$ M" S) \5 @" Y C* N( o
solid food. He had no hospitalizations or surgery,' {, N$ J/ @( t! n5 J6 @3 E
and his psychosocial and psychomotor development
* Z: ?; v, g z. swas age appropriate.
, z: [3 D( B4 ]* T& A$ d) s" |: D- uThe family history was remarkable for the father,
: h2 T8 F/ Y2 |. F5 ]- Z8 Dwho was diagnosed with hypothyroidism at age 16,/ O" k; ?9 ?1 r+ `$ C1 J
which was treated with thyroxine. The father’s+ W* T7 }9 X' J
height was 6 feet, and he went through a somewhat
& s7 P8 P( C2 a4 h: f8 ~9 Rearly puberty and had stopped growing by age 14.2 i& m7 l. M$ {6 F) a
The father denied taking any other medication. The v) r7 L4 z7 K' o/ z0 U
child’s mother was in good health. Her menarche$ J: T D2 w1 e' C
was at 11 years of age, and her height was at 5 feet
, ]6 G4 I& a( b, k2 Z4 j; J5 inches. There was no other family history of pre-
9 J7 b4 G* Y( Qcocious sexual development in the first-degree rela-; _- d' s8 @6 M8 P, t
tives. There were no siblings.7 U( E: `- i1 M/ e5 v; O1 U8 F
Physical Examination) y+ L: z: g x' W
The physical examination revealed a very active,
$ c4 E, ? |8 ^playful, and healthy boy. The vital signs documented1 G9 r& `, z# Q" Z. j; x0 x
a blood pressure of 85/50 mm Hg, his length was
7 h' b5 p" a# @90 cm (>97th percentile), and his weight was 14.4 kg
6 c0 y+ T) |% o3 F! F. I(also >97th percentile). The observed yearly growth
6 r( h* i/ \ G$ A% hvelocity was 30 cm (12 inches). The examination of
( w/ P( B0 A; O6 Dthe neck revealed no thyroid enlargement.! Z. }( K- X# w5 ?9 Z" L2 a [
The genitourinary examination was remarkable for
( w" |0 }- t" B. ?$ Fenlargement of the penis, with a stretched length of# j8 q! g% G( ]/ G5 z
8 cm and a width of 2 cm. The glans penis was very well% _( S* y" i5 q1 ^& t" c- \
developed. The pubic hair was Tanner II, mostly around% U$ }- r+ O4 Y! z J) y
540
: S' c' l" S, v4 \at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" k6 @! X' p+ U0 B
the base of the phallus and was dark and curled. The4 x; n/ i: z1 g1 [
testicular volume was prepubertal at 2 mL each.
( T, y3 Z9 \+ O/ j7 W/ E3 W5 `The skin was moist and smooth and somewhat
, W+ n5 H1 W* k; N7 b# k# ^3 u noily. No axillary hair was noted. There were no
; @; a2 j/ o' ^6 |+ J5 w- `( {abnormal skin pigmentations or café-au-lait spots.
6 a B. ^ b1 UNeurologic evaluation showed deep tendon reflex 2+
/ i v' |; |5 Q6 P' a7 h) z( xbilateral and symmetrical. There was no suggestion3 ]% Z L L, O, P
of papilledema.* Z: ]. h5 s& J6 N( T' @
Laboratory Evaluation5 d7 @$ Y* Z5 t+ d* J
The bone age was consistent with 28 months by
( T: z# M' U1 d+ Lusing the standard of Greulich and Pyle at a chrono-
2 z- D: l8 q, J$ N6 |" blogic age of 16 months (advanced).5 Chromosomal
/ C' }; g! b3 c5 d' ekaryotype was 46XY. The thyroid function test4 G2 G5 o+ L; D# o
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
9 ~4 }, H$ {; s' _( Z6 X, C. Glating hormone level was 1.3 µIU/mL (both normal).
) P- E5 r6 P e; s9 }The concentrations of serum electrolytes, blood
& l; l$ K- R& q8 Wurea nitrogen, creatinine, and calcium all were
$ Q5 o3 @2 q& z3 R9 Twithin normal range for his age. The concentration& L: n2 L# ?0 ?/ Y; \. ]
of serum 17-hydroxyprogesterone was 16 ng/dL
) W! j! m; ^) t(normal, 3 to 90 ng/dL), androstenedione was 20& c* \, o2 m# M, x; U) Z6 p' O, F Z/ Z
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
5 O. a' C$ w. O/ F! K8 v3 Pterone was 38 ng/dL (normal, 50 to 760 ng/dL),
) J& v2 N4 m5 B( L6 udesoxycorticosterone was 4.3 ng/dL (normal, 7 to: _) ~5 [7 ~" C5 W
49ng/dL), 11-desoxycortisol (specific compound S)
6 w) E4 ]3 g6 ^, C$ M7 Dwas 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-4 C1 o% g7 J: ~4 y
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total% T- H5 s/ s4 Q- e4 O: O8 o/ S; y
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),3 P4 @: ?1 u* u/ Z) [: u# K7 y
and β-human chorionic gonadotropin was less than6 p! k1 V* j5 W/ ^9 N, A
5 mIU/mL (normal <5 mIU/mL). Serum follicular
: `$ s6 W. T- c- J! H! zstimulating hormone and leuteinizing hormone: ]7 A7 Y* c' F& X$ t) j/ o
concentrations were less than 0.05 mIU/mL
, o& p( d4 N- A8 l1 x(prepubertal).
4 J5 i0 H0 a0 P( \; x6 U/ [The parents were notified about the laboratory
- P: b' A) W2 bresults and were informed that all of the tests were; s/ f! T2 y, P8 A6 W
normal except the testosterone level was high. The& m# ^$ y% E( Z/ N& @
follow-up visit was arranged within a few weeks to
0 m& l+ q5 f) Pobtain testicular and abdominal sonograms; how-
+ I; @1 @2 D9 Q4 ^' Rever, the family did not return for 4 months.8 z0 @( J% ?3 `6 P0 G- D
Physical examination at this time revealed that the
7 X( ~# V! R3 z. Nchild had grown 2.5 cm in 4 months and had gained ]! c1 {5 P5 e% f7 x
2 kg of weight. Physical examination remained
6 O) C' q% H4 Q( m; qunchanged. Surprisingly, the pubic hair almost com-
0 r% o) O3 o( Z. y( k8 M6 Gpletely disappeared except for a few vellous hairs at( I4 g& S% o9 O* b6 A
the base of the phallus. Testicular volume was still 2* u# F5 l" @ }, q6 T8 a
mL, and the size of the penis remained unchanged.
0 f' ?, H1 Q2 l$ l5 @0 r& I- ^The mother also said that the boy was no longer hav-
: H& w$ R6 }& C2 L$ Ging frequent erections.
. O# S* p+ M7 Y6 B X. y* uBoth parents were again questioned about use of
. S. C/ O& t* }' P+ N( y4 ]: Yany ointment/creams that they may have applied to! M N' t2 E: F+ Q* V- @6 r
the child’s skin. This time the father admitted the
3 i/ J" E0 n6 Y( @4 GTopical Testosterone Exposure / Bhowmick et al 541- O: |2 M! K, C5 n. I5 h2 D
use of testosterone gel twice daily that he was apply-
- h: t4 Q5 l0 L7 ?1 ?ing over his own shoulders, chest, and back area for7 l! I" E0 m g6 f y
a year. The father also revealed he was embarrassed
# H# i+ Q! J; I- q: Y( l2 \to disclose that he was using a testosterone gel pre-
0 H) M9 r4 S, v9 o9 pscribed by his family physician for decreased libido
. _3 X5 {* j# n& ^# A4 l# d* Bsecondary to depression.4 ~7 T' n f. d, I+ o- X* F" W
The child slept in the same bed with parents.
4 |! u6 S5 S d, ~1 V! I4 V" x& ZThe father would hug the baby and hold him on his- @$ w3 ~0 ]8 s% m) R' M
chest for a considerable period of time, causing sig-! c# w, u2 k& `0 z$ g( l
nificant bare skin contact between baby and father.
- ~$ d- I! G7 GThe father also admitted that after the phone call, P/ Y* G( L! J+ V
when he learned the testosterone level in the baby" G/ _' {9 U, l/ X
was high, he then read the product information
. Z) e; ^3 }5 @+ ]packet and concluded that it was most likely the rea-$ h2 A4 o- m1 I2 a3 x A( T1 `7 w
son for the child’s virilization. At that time, they0 s2 M6 z% A1 w V. w
decided to put the baby in a separate bed, and the }, `5 q9 \4 \2 a
father was not hugging him with bare skin and had, v6 Y/ y) ?1 Q3 g5 R/ C' m- J% d
been using protective clothing. A repeat testosterone
+ ~" f& k* Z9 s2 e: d+ |test was ordered, but the family did not go to the0 H* q8 x- r' @: f K: `7 \
laboratory to obtain the test.6 c; \0 r7 V7 Q* N" o W
Discussion
% J" |& D4 ~. ^& SPrecocious puberty in boys is defined as secondary% e7 l" h7 v% _
sexual development before 9 years of age.1,4 w2 A8 l" N; G% ~8 H
Precocious puberty is termed as central (true) when
/ R# s: ^% O: [2 w, git is caused by the premature activation of hypo-
. ~. l. W" b5 h* `- R: zthalamic pituitary gonadal axis. CPP is more com-& v4 P8 x0 F E( J0 K* m4 X5 r
mon in girls than in boys.1,3 Most boys with CPP
& B7 k+ J! `! Y% [5 e8 ^may have a central nervous system lesion that is
, o( X/ P& ?5 n: H) V* Aresponsible for the early activation of the hypothal-0 ]" v9 T" F. A: Y, b" N) o+ ] y, C
amic pituitary gonadal axis.1-3 Thus, greater empha-" E" |: e. C7 H+ M; O2 v3 v/ v
sis has been given to neuroradiologic imaging in
3 ?9 F' G" ?) y4 M& f+ h" W2 q* Fboys with precocious puberty. In addition to viril- p7 s7 A M) S" {& n
ization, the clinical hallmark of CPP is the symmet-
: Q3 _2 U+ |! B4 Wrical testicular growth secondary to stimulation by6 ~+ m; ~' T5 l/ t
gonadotropins.1,31 Z( e0 v- U9 }5 S1 l) N4 [2 N
Gonadotropin-independent peripheral preco-
& v, N* s* F/ R8 Q6 D2 w Jcious puberty in boys also results from inappropriate8 U' I5 N. L! U, m
androgenic stimulation from either endogenous or
/ Q% }4 _) e* N9 Vexogenous sources, nonpituitary gonadotropin stim-
L8 d; X& @' dulation, and rare activating mutations.3 Virilizing: |. C6 p1 L& s# P6 W0 ^8 H( T
congenital adrenal hyperplasia producing excessive
7 d* g4 {: L, V& W2 Yadrenal androgens is a common cause of precocious7 n: J* W: c9 z0 R
puberty in boys.3,41 E! }# q* q5 Z* J+ P1 F- i# n
The most common form of congenital adrenal! ]' V: j; P- _/ \+ E
hyperplasia is the 21-hydroxylase enzyme deficiency.
9 }! Z7 K" m. \+ \The 11-β hydroxylase deficiency may also result in
# f$ p/ r" q& Y" U% J8 S9 {excessive adrenal androgen production, and rarely,/ j; K. z. h& F4 E
an adrenal tumor may also cause adrenal androgen
* D' u- B4 `# M' p( ]excess.1,3
0 ]1 F3 N @, m: i( wat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from" q$ C5 n6 {8 C5 l# `
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
/ S; M, J, z# t2 v: |A unique entity of male-limited gonadotropin-
2 y5 y# S' X6 B& p2 C; R$ xindependent precocious puberty, which is also known6 g0 r& O @8 |( L- I+ {) S
as testotoxicosis, may cause precocious puberty at a& l0 ~/ |4 [( ^
very young age. The physical findings in these boys6 _. u4 z: q+ N2 ^" L
with this disorder are full pubertal development,/ J8 A7 P$ v4 V) H) i. s
including bilateral testicular growth, similar to boys8 a5 C8 i1 F$ V/ y
with CPP. The gonadotropin levels in this disorder1 H. N: L r N3 L
are suppressed to prepubertal levels and do not show
+ L' i, r$ e5 Epubertal response of gonadotropin after gonadotropin-
" k1 h8 V, X y; y }0 j8 Creleasing hormone stimulation. This is a sex-linked
. g3 ~$ h9 M& w fautosomal dominant disorder that affects only( S' `$ z: n4 r. u8 J
males; therefore, other male members of the family J$ W0 [# t/ `) l7 d
may have similar precocious puberty.3
( Z% z6 M. s+ d* l! V, kIn our patient, physical examination was incon-
. ?0 p! z8 P1 U H" |sistent with true precocious puberty since his testi-
1 R9 @- c4 h4 Z+ u' Hcles were prepubertal in size. However, testotoxicosis
, m' f8 J5 i9 W0 r8 p+ V8 x! Cwas in the differential diagnosis because his father! j6 B5 Y7 P7 t* J; |* a
started puberty somewhat early, and occasionally,
; a- ^4 t( m" W- O. T- b" U% Gtesticular enlargement is not that evident in the
5 c/ m( J3 h/ G9 A3 i/ Bbeginning of this process.1 In the absence of a neg-& B. H4 O5 a) T) C" N6 F5 X
ative initial history of androgen exposure, our
& v" Z' N+ O- j: f' d& D5 ]3 a0 d' Rbiggest concern was virilizing adrenal hyperplasia,
0 C4 I2 l9 k+ q- H7 q7 Zeither 21-hydroxylase deficiency or 11-β hydroxylase
# u. t' Y* ~( v/ F* Cdeficiency. Those diagnoses were excluded by find-. Q+ g m" U5 c# R% @
ing the normal level of adrenal steroids.
# k& r6 \, r/ e4 o" v) TThe diagnosis of exogenous androgens was strongly. s: i7 C9 q! q; f. K
suspected in a follow-up visit after 4 months because: W8 {, ^. X9 v/ N- `5 N T6 N
the physical examination revealed the complete disap-% B) a. N& h: Q( ^# U# w4 X* A
pearance of pubic hair, normal growth velocity, and
1 m1 D9 L1 }- x! Idecreased erections. The father admitted using a testos-. [0 |* A: d% w/ f
terone gel, which he concealed at first visit. He was
! @8 _7 {5 _0 p5 c2 Vusing it rather frequently, twice a day. The Physicians’3 t0 |: Q# h5 Z8 V, A# b
Desk Reference, or package insert of this product, gel or5 B% N# x2 G. ]* I6 ]
cream, cautions about dermal testosterone transfer to1 n6 P+ W* D- f& d, x( e$ s% V
unprotected females through direct skin exposure.! r# h/ c! I* N H
Serum testosterone level was found to be 2 times the
& m5 K/ P+ ]" w3 _% Gbaseline value in those females who were exposed to! y z0 p6 c2 O" G2 {
even 15 minutes of direct skin contact with their male
, ^2 o/ M {( x* e: V* x. S' _partners.6 However, when a shirt covered the applica-( P% ^+ \5 Y9 @+ M7 ^: |- ^
tion site, this testosterone transfer was prevented. V2 B( k$ c8 g( t3 Y
Our patient’s testosterone level was 60 ng/mL,
w: S% b R- P7 k$ c* ?) m+ Nwhich was clearly high. Some studies suggest that
) k* B* L. n( C0 } ldermal conversion of testosterone to dihydrotestos-$ c, _' g/ B& M5 Z( t/ Q. l
terone, which is a more potent metabolite, is more
0 f2 t K6 n" @5 ~( Z1 K% j$ Qactive in young children exposed to testosterone
: S+ W8 q. ~7 Z; I4 rexogenously7; however, we did not measure a dihy-* a9 q6 X: q) g- l
drotestosterone level in our patient. In addition to. w9 M$ U( H5 Q/ T7 u. G
virilization, exposure to exogenous testosterone in
3 B$ i0 e( I+ c: e6 S7 `children results in an increase in growth velocity and
- g2 s3 K3 @4 y# w: iadvanced bone age, as seen in our patient.. k" j) t. M4 `$ v+ n: M$ M
The long-term effect of androgen exposure during
) _+ O3 S8 o; ?' Q7 fearly childhood on pubertal development and final
`3 Y: J% a |+ sadult height are not fully known and always remain
7 X5 F, D, x# u0 k0 ^a concern. Children treated with short-term testos-
3 t9 z0 p9 E. @6 v# H& j6 qterone injection or topical androgen may exhibit some: W0 A; _$ |, u: P
acceleration of the skeletal maturation; however, after
* E' x& C. x3 Lcessation of treatment, the rate of bone maturation
* @1 m0 N2 ?: [# w1 @+ z. X5 H9 Xdecelerates and gradually returns to normal.8,9
6 @# [ n; Z$ z" \There are conflicting reports and controversy
: x9 g3 [- M' ^2 z: M% cover the effect of early androgen exposure on adult1 f* V" f& |+ A8 \5 J
penile length.10,11 Some reports suggest subnormal# L/ z8 F, w: D, H5 ]3 n2 U
adult penile length, apparently because of downreg-
/ J1 d- q9 P {ulation of androgen receptor number.10,12 However,. G* _! U" c% `' V( ?
Sutherland et al13 did not find a correlation between5 G/ W% H# Q; ^/ f
childhood testosterone exposure and reduced adult
, V$ g6 k5 k. ^0 y; I7 qpenile length in clinical studies.
3 b3 Q4 \" R* Z) E# ?( aNonetheless, we do not believe our patient is
- G [* q+ v# ]$ v. cgoing to experience any of the untoward effects from7 r2 s% l9 n7 d" i6 l
testosterone exposure as mentioned earlier because
4 g7 }; Q+ c4 R5 i! c9 sthe exposure was not for a prolonged period of time.
% R& ]+ B, W" I: pAlthough the bone age was advanced at the time of; v c- I/ T& l: e6 K' Y. ^5 d. b3 e
diagnosis, the child had a normal growth velocity at$ k( p9 H% {/ N) h8 F+ G/ x, W
the follow-up visit. It is hoped that his final adult
/ B1 n9 ~* H& S# v- Hheight will not be affected.& Q- _) {3 l, s! j; b7 [
Although rarely reported, the widespread avail-
$ `2 l# s/ p1 R, a0 Yability of androgen products in our society may; l7 i" E1 z7 S, S' h# x" A
indeed cause more virilization in male or female3 N+ B1 F7 W) {' m, p
children than one would realize. Exposure to andro-
# P. M- v5 b- J9 \: C, \gen products must be considered and specific ques-
* V9 [0 [' t+ G( V; F! M" @4 Etioning about the use of a testosterone product or2 c v: O2 w- ^9 i
gel should be asked of the family members during$ i6 X& i, V! ^0 _/ Y) |% x
the evaluation of any children who present with vir-( |1 H2 {( a- B: M2 `
ilization or peripheral precocious puberty. The diag-+ h; U. E# G9 ^ X; u% i( @4 g
nosis can be established by just a few tests and by) C& B9 V0 { F
appropriate history. The inability to obtain such a! A4 G3 ]" D2 j4 t. M# z* F5 Q
history, or failure to ask the specific questions, may
5 d! F5 V$ y9 @) L9 I3 dresult in extensive, unnecessary, and expensive% _) N: n* h; ]
investigation. The primary care physician should be9 f6 ^2 y9 K8 p
aware of this fact, because most of these children
& z C- j: l) ]) Xmay initially present in their practice. The Physicians’
% F% n0 ^% n1 g" M: O1 ]; l& SDesk Reference and package insert should also put a
$ p7 q% i' R+ o# S2 h: D5 cwarning about the virilizing effect on a male or
7 N3 b% |8 N) X& z/ Afemale child who might come in contact with some-! E G/ h9 y9 U' ^( W0 e6 D8 X# i
one using any of these products.
! w' }4 [- E# r1 vReferences
* c) C* L. i9 K+ y( X1. Styne DM. The testes: disorder of sexual differentiation9 @' T) H+ S8 o
and puberty in the male. In: Sperling MA, ed. Pediatric
" {: D) M, ~/ s* E2 y$ i! ^9 |& G |8 ~Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
9 |* G7 G, z Y2002: 565-628.! W! t2 G. L+ k" w# p* k# X. u
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious- O( f8 D5 i! [4 `
puberty in children with tumours of the suprasellar pineal/ `7 c& p* k9 I& q. U) A6 J- d5 q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
' g2 I7 H9 T, eTopical Testosterone Exposure / Bhowmick et al 543
$ `# u- m c: Mareas: organic central precocious puberty. Acta Paediatr.6 I7 A) Q2 ]7 ~# P
2001;90:751-756.# Z% D( T/ {2 l( a
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
+ J% G, W) A# E; K+ t5 pPediatric Endocrinology. 4th ed. New York, NY: Marcel
* t: D, H9 n7 g5 ^# `Dekker Inc; 2003:211-238.
' l! o2 A) j* R S4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual5 z! R1 }4 w8 }
development in a two-year-old boy induced by topical
! ^# Q2 @1 a) @) w, u2 Vexposure to testosterone. Pediatrics. 1999;104:e23." s+ R0 n# h3 g
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of" N; x5 p* ~3 ~
Skeletal Development of the Hand and Wrist. 2nd ed.
2 e, H; J# V& U6 k! pStanford, CA: Stanford University Press; 1959.: j8 U( p! ~ q$ n2 C/ A4 |
6. Physicians’ Desk Reference. Androgel 1% testosterone,
' @; ]4 c& u$ u9 B3 bUnimed Pharmaceutical Inc. Montvale, NJ: Medical
: W+ }* J$ I. t7 R& o- ?Economics Company, Inc; 2004:3239-3241.# _3 F: g, l! O# q
7. Klugo RC, Cerny JC. Response of micropenis to topical0 g; A; z8 ^/ m. I
testosterone and gonadotropin. J Urol. 1978;119:
* U: |3 m5 b- [7 l# O. F667-668.& L/ ]) p3 h0 r( |/ \) J
8. Guthrie RD, Smith DW, Graham CB. Testosterone! ?* b" N8 |% d2 D
treatment for micropenis during early childhood. J Pediatr.
( d$ y( E- i' R( C) x! s1973;83:247-252.0 z/ ]# d! V1 g( u Q
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone* [! {: W' Q" T
therapy for penile growth. Urol. 1975;6:708-710.8 n% v. O- Z8 I9 j y4 ?% p+ j
10. Husmann DA, Cain MP. Microphallus: eventual phallic
: s& `. x$ C" d1 s0 | \" z6 Zsize is dependent on the timing of androgen administra-
) x1 Z9 A4 H. W- ^5 Dtion. J Urol. 1994;152:734-739.; f. d) y4 h ]* Y3 s! V6 S; i
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
3 Z/ U. a6 X) B/ ]7 A7 y: vdoes early treatment with testosterone do more harm) ?5 }7 f+ c/ @2 I, Q: ]$ t$ L- F
than good? J Urol. 1995;154:825-829.
4 Q6 v# X+ E6 H/ Q& C: u6 Z12. Takane KK, George FW, Wilson JD. Androgen receptor" h2 L( i* X, N" Z6 \
of rat penis is down-regulated by androgen. Am J Physiol.
' h7 Q/ X; _# a; t0 \1990;258:E46-E50.
) c* ]6 d# v) ]$ ^, {. j5 ~8 t13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect( ^/ d3 D' K5 l7 W* Q# P
of prepubertal androgen exposure on adult penile
, V. p1 e7 o$ ?7 M* P- mlength. J Urol. 1996;156:783-787. |
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