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is a significant concern for physicians. Central
) ?* X( S3 P' d- e$ mprecocious puberty (CPP), which is mediated" a9 C) O' |1 h1 _1 `+ }
through the hypothalamic pituitary gonadal axis, has. [; M( f+ Z% F1 A+ h
a higher incidence of organic central nervous system5 L" b6 o. c, o6 B# Y' U, L
lesions in boys.1,2 Virilization in boys, as manifested g: ~: H" P2 p/ B9 `0 G+ ]
by enlargement of the penis, development of pubic0 ?4 u/ R* M* b% y) G
hair, and facial acne without enlargement of testi-, w( h/ @! \/ }% A
cles, suggests peripheral or pseudopuberty.1-3 We
8 {. j0 L( `2 p" A6 lreport a 16-month-old boy who presented with the& j! e: e3 H( u+ y! l5 l+ T$ O
enlargement of the phallus and pubic hair develop-
& `$ N7 P) i1 t2 y7 Ament without testicular enlargement, which was due9 }2 K+ t2 p6 g! r" l, q3 o0 T
to the unintentional exposure to androgen gel used by$ q. V' | E& L% [
the father. The family initially concealed this infor-5 C- D. C" n% T$ i9 e G3 C$ X
mation, resulting in an extensive work-up for this
+ x9 N- ]% S: }7 |7 N+ tchild. Given the widespread and easy availability of- d* D6 B5 A6 }8 C) T) H8 O
testosterone gel and cream, we believe this is proba-& p. b; I# h0 \
bly more common than the rare case report in the
; d8 U" t+ J- L- Lliterature.4
* q4 \" b+ ^& t% X# l+ HPatient Report+ q* e2 U# D* m7 r6 F
A 16-month-old white child was referred to the" N7 D# _& i( j" h A
endocrine clinic by his pediatrician with the concern# C' O+ b& U+ ^$ {9 s
of early sexual development. His mother noticed0 p- m( `- {) ~8 x3 z g4 c$ H
light colored pubic hair development when he was
2 K0 ~/ U7 W: W" V o. eFrom the 1Division of Pediatric Endocrinology, 2University of4 |* W% j [' C$ V) p
South Alabama Medical Center, Mobile, Alabama.5 _0 _+ C% b1 U$ [: j$ y' E4 ?( U
Address correspondence to: Samar K. Bhowmick, MD, FACE,7 ]2 ]! t# f6 [2 m) ^' p
Professor of Pediatrics, University of South Alabama, College of
) N0 y8 V% U" RMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;2 R+ T$ A$ P% l* z
e-mail: [email protected].
/ X5 y$ o7 W( @8 N w: H. T4 oabout 6 to 7 months old, which progressively became
" S2 e% X0 f7 k* U- |5 N/ ?$ I# Idarker. She was also concerned about the enlarge-( X3 u! \3 v, q- _, D7 ^$ w: N
ment of his penis and frequent erections. The child
# ]; v3 ~' A5 P: A/ k" |9 E) {was the product of a full-term normal delivery, with# q+ j) D' e f7 H
a birth weight of 7 lb 14 oz, and birth length of
4 L% x+ b( C% {5 `. \9 K20 inches. He was breast-fed throughout the first year4 j) ?1 u6 E# e- u% s, ]+ M0 q1 w9 y3 B
of life and was still receiving breast milk along with8 r9 @. \8 o- r3 X
solid food. He had no hospitalizations or surgery,6 W6 R) B _5 b; o
and his psychosocial and psychomotor development9 d0 t. i3 h' e0 J& T
was age appropriate.% d2 I# |. B5 Q! v/ ~9 c& W
The family history was remarkable for the father,
- q1 [% Q( N( q! j- `9 Dwho was diagnosed with hypothyroidism at age 16,
' F, y& d" ]4 c& u5 Y' A# Ywhich was treated with thyroxine. The father’s
3 a) ^0 y0 Z, O0 S, M& Uheight was 6 feet, and he went through a somewhat
$ [( k5 d X& a4 k+ C) u* Nearly puberty and had stopped growing by age 14.) a4 i k4 N8 v+ d* O8 y
The father denied taking any other medication. The, p3 r6 I; o8 V
child’s mother was in good health. Her menarche
* J# X1 K: H. c6 bwas at 11 years of age, and her height was at 5 feet. s7 f3 j9 f) S6 l/ A# @) v
5 inches. There was no other family history of pre-4 b! B0 V0 e7 k" U. }& v b$ l3 \
cocious sexual development in the first-degree rela-
4 E$ N- {% ^9 ?/ Stives. There were no siblings.5 R- m$ v4 [# `) i8 Z6 B& F
Physical Examination0 U2 Q/ w8 ]$ L0 L C
The physical examination revealed a very active,2 s. k" ?: d) x' X$ ?
playful, and healthy boy. The vital signs documented6 ?; l3 D, G( ]6 d8 \- I, K) s# M
a blood pressure of 85/50 mm Hg, his length was" `9 ?9 B! g8 e
90 cm (>97th percentile), and his weight was 14.4 kg* l! g( M& Y3 M& i3 a
(also >97th percentile). The observed yearly growth& M; d2 F/ ^6 {
velocity was 30 cm (12 inches). The examination of1 e0 ~' x7 u7 w1 p& t
the neck revealed no thyroid enlargement.
0 }! o) u2 i6 ]' K: f8 _The genitourinary examination was remarkable for7 ^& O$ J& Y3 Y( t( M+ y
enlargement of the penis, with a stretched length of% Z( U4 l* m) n L
8 cm and a width of 2 cm. The glans penis was very well
1 Y/ D$ N* y7 O2 z+ ?! ddeveloped. The pubic hair was Tanner II, mostly around# q4 [$ h2 v% j' m9 s* k% l; q
540$ U7 p, N6 u0 s% a4 v; D% T
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from6 N7 i# G8 j% [: b# X6 o
the base of the phallus and was dark and curled. The
6 S# q5 l3 G) L- u* T d, Ztesticular volume was prepubertal at 2 mL each.! Q9 r7 }5 k: Z) X0 ]; g0 r
The skin was moist and smooth and somewhat1 q9 K% h/ X% h6 [# r: O$ I; X" X
oily. No axillary hair was noted. There were no
6 V! x7 q4 D% o' s5 Z7 i! Fabnormal skin pigmentations or café-au-lait spots.3 n+ N5 X3 e2 A% M
Neurologic evaluation showed deep tendon reflex 2+$ x2 Z& _) d& u& p% x. W
bilateral and symmetrical. There was no suggestion
4 T8 ^8 y8 t6 t% m# {. } Fof papilledema.
, W5 Y% E2 g2 F n: X3 LLaboratory Evaluation
7 x G6 m) ~3 n6 h BThe bone age was consistent with 28 months by
9 ~- U; f; \, _1 k i& Z1 dusing the standard of Greulich and Pyle at a chrono-
$ A0 |0 ~% d# C0 n p3 ^; J- H9 a6 Glogic age of 16 months (advanced).5 Chromosomal
7 Y+ N1 F( K- |5 @8 J$ ikaryotype was 46XY. The thyroid function test
/ C1 X$ R# p% |+ ?showed a free T4 of 1.69 ng/dL, and thyroid stimu-
7 R1 M, Y9 H9 E/ r2 c. Hlating hormone level was 1.3 µIU/mL (both normal).
6 a( \ e9 }' u0 Z1 Z( ]+ OThe concentrations of serum electrolytes, blood+ J! P& k! |' `& p# n4 C
urea nitrogen, creatinine, and calcium all were
) F+ M# l2 ^9 \3 `/ H( Dwithin normal range for his age. The concentration6 B3 {0 O7 f( c6 {. @5 o2 Y9 L w9 ~
of serum 17-hydroxyprogesterone was 16 ng/dL: y0 _; e8 n0 A* C/ ?* X
(normal, 3 to 90 ng/dL), androstenedione was 20
4 V. {7 x3 ~/ T: \ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
: p9 m, h) F5 v1 D' U( H) aterone was 38 ng/dL (normal, 50 to 760 ng/dL),
& i5 p7 L5 t! k8 f- F9 c; Gdesoxycorticosterone was 4.3 ng/dL (normal, 7 to* `: w+ ]6 B+ o. h( b+ F& B1 g( ~
49ng/dL), 11-desoxycortisol (specific compound S)) f- y9 F' i) g: j: N
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
6 ]3 x# M& t/ ]9 b/ M, itisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total6 s( D+ T' W2 P* m* _2 O
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),# ?: E* N, ~" |$ a. Q$ Y2 f
and β-human chorionic gonadotropin was less than
0 M! q) z0 `1 j2 s5 u5 mIU/mL (normal <5 mIU/mL). Serum follicular
6 b! U" e5 l: k. L: O8 Sstimulating hormone and leuteinizing hormone
4 w+ E+ d6 _ [& l/ W) @concentrations were less than 0.05 mIU/mL
) Q, D9 {& i* W# {(prepubertal).
( d* K( V% \- P( O6 yThe parents were notified about the laboratory
. ]% M3 N6 C$ c& u( l" l/ ]results and were informed that all of the tests were9 z0 A j! W7 W# W! P9 O
normal except the testosterone level was high. The
+ h& m& W3 y3 n( \4 w5 R+ L3 Vfollow-up visit was arranged within a few weeks to& U/ w, n4 z) U: {7 N: H2 X: L
obtain testicular and abdominal sonograms; how-
; q* }! I7 V. s2 v7 M5 Mever, the family did not return for 4 months./ u. B" J8 i0 {/ V
Physical examination at this time revealed that the9 V# p8 u2 d ~2 U
child had grown 2.5 cm in 4 months and had gained
& \) S8 @) q4 X" v- ?; t2 kg of weight. Physical examination remained3 ]8 q5 `# \* p2 [' L- T
unchanged. Surprisingly, the pubic hair almost com-: s t+ `! s, R+ Q" I" S! d- [
pletely disappeared except for a few vellous hairs at
/ z X: P' O9 k6 G/ }$ rthe base of the phallus. Testicular volume was still 25 C( ]' K0 s6 |
mL, and the size of the penis remained unchanged.
3 S4 n( ?# e% @& rThe mother also said that the boy was no longer hav-
0 M4 Y" c) [* K; Wing frequent erections.
/ ~1 ~/ [( R. O/ a! y6 {& E; R* s' f+ F- OBoth parents were again questioned about use of" z! B* m# v% G) ~! ~8 ?
any ointment/creams that they may have applied to( Y* T$ |7 s, o1 G; M( c7 |, _0 ?
the child’s skin. This time the father admitted the3 h7 V% Y- v5 l: |( D1 f* l( X: t
Topical Testosterone Exposure / Bhowmick et al 541, J& d/ L3 P/ z1 |8 f
use of testosterone gel twice daily that he was apply-
$ G, J7 K. C; Z8 g' w Cing over his own shoulders, chest, and back area for" W3 ~9 G5 P2 T' ]
a year. The father also revealed he was embarrassed
5 h: e6 m- D8 e2 Vto disclose that he was using a testosterone gel pre-( N& [$ |# @+ h) E
scribed by his family physician for decreased libido: j! W {: i5 V r
secondary to depression.# _& v6 G# W% y& g3 O$ k% c" A
The child slept in the same bed with parents.
- f3 l6 F. H3 M/ i) t' |8 v8 rThe father would hug the baby and hold him on his+ Q' p+ }* f& r! s% G
chest for a considerable period of time, causing sig-5 P& q) }* D1 N& T
nificant bare skin contact between baby and father.7 l$ w) V5 h! c3 L# r# s
The father also admitted that after the phone call,
0 W/ o- B4 l8 Y' ?* g# {5 mwhen he learned the testosterone level in the baby4 ~, X5 i! i5 a2 s6 U# n
was high, he then read the product information% S8 g# l% }' B! v
packet and concluded that it was most likely the rea-
i4 M" y4 y/ |9 |* nson for the child’s virilization. At that time, they
! i. C; u% y! V% r V0 `+ C. edecided to put the baby in a separate bed, and the8 v" }5 ]/ `0 Q" a
father was not hugging him with bare skin and had( p- B1 E2 e% H! Y5 W
been using protective clothing. A repeat testosterone
1 |$ a4 S1 k: u3 ~) Jtest was ordered, but the family did not go to the
5 h5 K9 n8 x+ T9 A& alaboratory to obtain the test.. d( H8 f% A3 Q" Q/ ^* e
Discussion
( A% r, l* ^9 b* yPrecocious puberty in boys is defined as secondary
( M, C- G3 x) t8 y9 _) e4 ?* C Nsexual development before 9 years of age.1,4( O# @ f! H9 W z; }$ M3 W
Precocious puberty is termed as central (true) when& \2 D- Q) T5 f* ^# \! L
it is caused by the premature activation of hypo-' b0 X# c9 [5 l
thalamic pituitary gonadal axis. CPP is more com-% f: K' G8 R2 R O/ u# D
mon in girls than in boys.1,3 Most boys with CPP
* u3 i3 @$ N$ C4 Q* c Bmay have a central nervous system lesion that is* P2 }. C3 q; @ F9 J1 p
responsible for the early activation of the hypothal-. z& n. `$ A- z' \/ U' G
amic pituitary gonadal axis.1-3 Thus, greater empha-7 |2 Y7 z: ?/ v, q- \0 d
sis has been given to neuroradiologic imaging in
% u8 n) U/ j$ Y1 i8 E6 M# C( zboys with precocious puberty. In addition to viril-2 O8 G2 N7 L: x6 j# v: b* `/ Q
ization, the clinical hallmark of CPP is the symmet-) q" H Q7 d w: o- W( f/ @" V( N2 k+ g3 b
rical testicular growth secondary to stimulation by
8 w( |3 M: Y9 |gonadotropins.1,3% D5 k, k1 s# T. }0 A
Gonadotropin-independent peripheral preco-7 c3 e3 e/ T7 w% c; u) j4 q
cious puberty in boys also results from inappropriate3 y" U3 q- M8 r- i
androgenic stimulation from either endogenous or
! G+ k5 G9 E! A6 sexogenous sources, nonpituitary gonadotropin stim-$ m9 P; c( j. E
ulation, and rare activating mutations.3 Virilizing% A% Y6 A2 |( o8 f0 g
congenital adrenal hyperplasia producing excessive
; a$ i: m4 j3 e6 W- j/ f$ o$ Badrenal androgens is a common cause of precocious
/ }/ s1 U/ y) ^' @5 c ?puberty in boys.3,4
4 {3 B& Q2 n4 ]" sThe most common form of congenital adrenal
8 |, A. P: z1 w* Chyperplasia is the 21-hydroxylase enzyme deficiency.
; i- |' {' s: \& BThe 11-β hydroxylase deficiency may also result in9 v1 `+ e `- @' o$ H4 _. N
excessive adrenal androgen production, and rarely,8 v5 ?3 \0 J. D4 p0 a) p9 U
an adrenal tumor may also cause adrenal androgen
. u- }4 p1 H, {4 vexcess.1,3
# u9 E4 p8 f! z$ }at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
8 z5 B, D# L3 s# x" [542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
! V4 g- y! ^% J* q5 G. ~A unique entity of male-limited gonadotropin-
6 X6 O& t- y! [' t# Z5 Hindependent precocious puberty, which is also known- W. h, x/ e2 [
as testotoxicosis, may cause precocious puberty at a4 s: L% t5 H' Q' l9 _# f5 p
very young age. The physical findings in these boys
' i% q2 ^$ I9 U5 h9 j$ q6 twith this disorder are full pubertal development,7 t" N2 e) D* l8 D, A: ^0 L; O0 m
including bilateral testicular growth, similar to boys6 C& w" q! J9 G2 o
with CPP. The gonadotropin levels in this disorder1 `1 O" D0 U# I( f) U4 e
are suppressed to prepubertal levels and do not show! z: G$ f" X* j- z5 [5 P
pubertal response of gonadotropin after gonadotropin-
8 \$ A2 O& z M- R: Oreleasing hormone stimulation. This is a sex-linked
4 E9 b2 G, _5 R' oautosomal dominant disorder that affects only
$ z4 B- M# X( k$ omales; therefore, other male members of the family6 b/ E ^8 }- V* a* K
may have similar precocious puberty.37 z6 g$ G4 X, s+ `2 [' c1 P& v
In our patient, physical examination was incon-$ F5 ~* Z V% R% H5 j
sistent with true precocious puberty since his testi-5 P0 t4 t5 E1 p7 E L6 J' x5 _
cles were prepubertal in size. However, testotoxicosis& e i0 Y; t1 }3 j( X
was in the differential diagnosis because his father" W3 \# I- d* D7 a' c8 G! N
started puberty somewhat early, and occasionally,
1 D9 I" A* N6 \0 Ntesticular enlargement is not that evident in the
! n- n1 P) P3 y& u5 D2 X5 V: Sbeginning of this process.1 In the absence of a neg-
6 k0 L3 K! z; c3 W# L: u5 D) Dative initial history of androgen exposure, our# S, e3 }! J+ O% N7 ? O
biggest concern was virilizing adrenal hyperplasia,
& x- r, x! R9 W( ceither 21-hydroxylase deficiency or 11-β hydroxylase. x: h n6 v7 s* V5 E
deficiency. Those diagnoses were excluded by find-
$ P+ P: ~. t: h0 ping the normal level of adrenal steroids.5 r. h2 h) s5 I R2 M
The diagnosis of exogenous androgens was strongly8 _6 _) G% i; c
suspected in a follow-up visit after 4 months because0 }* g8 Y8 v* T3 r% W$ g
the physical examination revealed the complete disap-' k$ T4 s5 l: M( g& J% z; b. U
pearance of pubic hair, normal growth velocity, and$ t4 v$ m0 w) O
decreased erections. The father admitted using a testos-
% g5 E" e) {& K! s/ |! I2 z+ L Xterone gel, which he concealed at first visit. He was: w0 q% q. u: B3 r7 W
using it rather frequently, twice a day. The Physicians’" D! J' Y9 D5 _# u/ s2 m, {
Desk Reference, or package insert of this product, gel or
0 \7 |) q7 L- z# x+ \4 K$ }cream, cautions about dermal testosterone transfer to
9 q, a+ k: ~, `unprotected females through direct skin exposure.8 \; y0 t4 ~2 J( _3 k8 B- x
Serum testosterone level was found to be 2 times the
' n5 {/ M9 o/ Nbaseline value in those females who were exposed to
" n& H; D$ Q* I) j' ]even 15 minutes of direct skin contact with their male& R! `7 G1 D, u- ^ j. F
partners.6 However, when a shirt covered the applica-: W ^8 K. E2 ?2 R# @
tion site, this testosterone transfer was prevented.9 M# C# ~6 v. R A+ ^
Our patient’s testosterone level was 60 ng/mL,
- N* a% i! }' E7 uwhich was clearly high. Some studies suggest that T! C/ n6 u- p1 H1 i; F5 b+ }
dermal conversion of testosterone to dihydrotestos-
" C% G- i7 s/ xterone, which is a more potent metabolite, is more* m) P: D+ w( L0 p* M- t6 z
active in young children exposed to testosterone/ I ~# y. E& p3 h1 x" k! a
exogenously7; however, we did not measure a dihy-
: y; o, i( X3 s7 ^9 d+ sdrotestosterone level in our patient. In addition to
1 p( T$ C* M( k1 k" H% wvirilization, exposure to exogenous testosterone in
t7 _" }9 V& {4 f8 I. l; kchildren results in an increase in growth velocity and
/ w" G% f& d) Xadvanced bone age, as seen in our patient.9 R8 z) x7 ]1 D
The long-term effect of androgen exposure during* o. ^* z& _8 Y1 t4 n
early childhood on pubertal development and final
& s- b2 a1 S& t- P/ w2 O0 D: tadult height are not fully known and always remain9 _9 [: m" ]2 s2 s% S9 J$ J
a concern. Children treated with short-term testos-% s5 M9 j) }' i' M, w B
terone injection or topical androgen may exhibit some
4 z2 x( K' t% S0 b1 |4 `" L3 xacceleration of the skeletal maturation; however, after2 U% n( h6 ]1 f' x
cessation of treatment, the rate of bone maturation
% C4 Z- h% l( ~3 `# \7 Ddecelerates and gradually returns to normal.8,9
* f. z9 Y _. r e& H; z" K: zThere are conflicting reports and controversy( K6 F' ]0 y' L) W; c! Y. P! g
over the effect of early androgen exposure on adult
8 r1 a8 V" R' G1 V! Zpenile length.10,11 Some reports suggest subnormal
( f8 d d' ]$ ~2 |! q3 x8 n! Xadult penile length, apparently because of downreg-/ [7 S9 l& | f3 z
ulation of androgen receptor number.10,12 However,; ?" E U/ V* l0 w8 B
Sutherland et al13 did not find a correlation between
* K" C0 V! @$ d. a0 echildhood testosterone exposure and reduced adult9 W& m6 U( i. |- r: W u w7 ^
penile length in clinical studies.3 O S/ O# ?3 f" h: p
Nonetheless, we do not believe our patient is8 D6 A% a$ J( O* x+ Y
going to experience any of the untoward effects from
9 I: P4 F$ I! i) P* Etestosterone exposure as mentioned earlier because
* ^2 Y6 l- k1 P* W# E& @! Tthe exposure was not for a prolonged period of time.2 f/ w. P/ P3 f* G& M8 {
Although the bone age was advanced at the time of
& l; l1 d/ F9 A9 w- @8 Y' R* vdiagnosis, the child had a normal growth velocity at; [3 H8 f! b7 T
the follow-up visit. It is hoped that his final adult
* d9 g" A; Q @; bheight will not be affected.0 a7 S1 y/ s0 r; A; ?
Although rarely reported, the widespread avail-
" o1 a p: c1 t. l8 b+ Xability of androgen products in our society may2 F. ^- e6 r; \
indeed cause more virilization in male or female
& U! w: d/ ?* qchildren than one would realize. Exposure to andro-: i, \5 ~$ O( G) `
gen products must be considered and specific ques-
; l6 y) S7 y `( U0 i. ztioning about the use of a testosterone product or
; G2 w$ ]( f& }4 f! }6 xgel should be asked of the family members during
8 v6 F1 h* Z* t0 |) y3 Pthe evaluation of any children who present with vir-
6 w, O$ p, [) j) Y* d) B- `! Lilization or peripheral precocious puberty. The diag-
b; S9 P7 M% ^6 P B5 I6 Anosis can be established by just a few tests and by, b8 X- r/ P) F
appropriate history. The inability to obtain such a! @- O$ m" K+ L M) C. f% |" P! f8 d
history, or failure to ask the specific questions, may1 i7 E0 B1 t8 U
result in extensive, unnecessary, and expensive
* X" M+ L; u1 \# ]investigation. The primary care physician should be/ J' ^% f5 x4 e0 h4 P
aware of this fact, because most of these children$ D' s& Z' w8 c# v: S4 U% E( L* e
may initially present in their practice. The Physicians’0 `/ G( E% L! k5 {4 Z0 J
Desk Reference and package insert should also put a
# J- z' _: s; M) ?8 [ Y/ ~4 q9 P7 Uwarning about the virilizing effect on a male or2 l" ~+ T8 [4 X7 C
female child who might come in contact with some-8 f& e# i. C$ r! g
one using any of these products.
3 `6 s# b6 M9 E, |$ k* }! U8 RReferences, p( l% x( N) |: H% ?
1. Styne DM. The testes: disorder of sexual differentiation
6 J9 |; O4 I6 i7 D. {7 A1 X0 rand puberty in the male. In: Sperling MA, ed. Pediatric
# i* x$ _% \$ ~4 N- a2 NEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;3 z2 G7 K4 Z R4 O
2002: 565-628.1 k3 p m/ e1 E% F8 J ?, A
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious, S2 a7 [" I! S' p4 I
puberty in children with tumours of the suprasellar pineal
$ P3 I# |* Y4 G. Cat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 w" B0 p7 U! T9 \( L2 |
Topical Testosterone Exposure / Bhowmick et al 543
& J$ J r: \, A4 J; aareas: organic central precocious puberty. Acta Paediatr.
! Y: h9 y% Y3 D$ e6 Y. P# n3 ]2001;90:751-756.9 H" [4 u# ~* g+ L$ d6 W# Q
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.
6 n1 _) J4 Z# P( G$ IPediatric Endocrinology. 4th ed. New York, NY: Marcel$ _# O/ a4 |1 Z) i( Z* a n/ i8 v% E# \
Dekker Inc; 2003:211-238.
7 h, U2 Z6 O' C, h* o. S8 E8 ~4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual6 a! `" }" w' c- x: q Q
development in a two-year-old boy induced by topical8 \5 K" a! ~5 c+ K2 U
exposure to testosterone. Pediatrics. 1999;104:e23.
7 [ ?4 w' j* l a2 \/ g( B5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
+ S' w5 c( u8 D: m7 F& d( ]Skeletal Development of the Hand and Wrist. 2nd ed.& M4 ~) K: z9 V; Q
Stanford, CA: Stanford University Press; 1959.
4 M1 v9 w" F' p( O7 _9 P6. Physicians’ Desk Reference. Androgel 1% testosterone,) ~- [1 k' k4 |4 _2 {5 s; j& p+ P
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
# P5 ~/ v% p' `3 |' [+ J1 s/ jEconomics Company, Inc; 2004:3239-3241.
; H( F; @( E1 w# X7. Klugo RC, Cerny JC. Response of micropenis to topical
6 S% q5 G+ c2 i9 Y, x* otestosterone and gonadotropin. J Urol. 1978;119:
2 b2 A) ]- |5 m; D& S; P667-668.
' p5 h1 ?! ?2 v3 ]: d8. Guthrie RD, Smith DW, Graham CB. Testosterone
2 R6 N, q, x+ y5 t5 e8 Ktreatment for micropenis during early childhood. J Pediatr.
8 a6 j6 h; i- a2 h2 }1973;83:247-252., R1 _' I2 O! L: e
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone$ a/ R9 V# W: a$ J+ s6 @
therapy for penile growth. Urol. 1975;6:708-710.5 s2 ~! { c+ ?7 |! `: d
10. Husmann DA, Cain MP. Microphallus: eventual phallic
: _) p+ l0 J6 N2 z7 X1 u$ asize is dependent on the timing of androgen administra-
* n) Z, F, A5 n; A- u( e; @1 Wtion. J Urol. 1994;152:734-739.
- `0 }6 w7 t4 ]2 w' ~11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
/ L' Z9 n# J8 u3 [ S5 sdoes early treatment with testosterone do more harm7 l& Q! h! \( p6 m% [
than good? J Urol. 1995;154:825-829.
% N. s- E- b- f12. Takane KK, George FW, Wilson JD. Androgen receptor
( n, Y- q. z, cof rat penis is down-regulated by androgen. Am J Physiol.0 v2 D( T5 h( w: G: C! o
1990;258:E46-E50.
: b2 X5 U& y7 P' ]: i ]13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect9 q$ `! u) _: |' v
of prepubertal androgen exposure on adult penile: j( H: G; C) y' ?
length. J Urol. 1996;156:783-787. |
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