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is a significant concern for physicians. Central. t' a4 d: k$ ^
precocious puberty (CPP), which is mediated+ R# V3 k( d* t$ v/ W3 p9 T
through the hypothalamic pituitary gonadal axis, has
. E. O5 @, \7 C3 F, F/ La higher incidence of organic central nervous system! W- i* @* {+ I- V, U
lesions in boys.1,2 Virilization in boys, as manifested: D" J* R3 D2 |- Q- a' y: E
by enlargement of the penis, development of pubic
) S/ n' l; j/ L7 e( s" I8 _hair, and facial acne without enlargement of testi-5 }0 x5 K; p. k, o9 x9 v" j* q
cles, suggests peripheral or pseudopuberty.1-3 We$ a$ E4 n. K) _3 n
report a 16-month-old boy who presented with the: Z& z% ^+ Y5 |/ F. u
enlargement of the phallus and pubic hair develop-
4 j$ q3 @. V6 c+ |3 s. N0 s3 y# Zment without testicular enlargement, which was due
3 N9 L2 z! h7 l3 \& \to the unintentional exposure to androgen gel used by3 F% c0 d+ A& V8 E5 ~' z
the father. The family initially concealed this infor-
0 H7 K7 T' I1 G8 c. X0 s! }mation, resulting in an extensive work-up for this
2 G& t, M8 V4 q! z6 Mchild. Given the widespread and easy availability of
$ c* y7 L$ m- [+ V& ^+ J; Dtestosterone gel and cream, we believe this is proba-5 ~9 w. r! C9 C" X1 Y
bly more common than the rare case report in the
]3 G3 R: F& T1 Nliterature.4
6 ~+ J1 Z9 P* _. w& {Patient Report
- Y( L+ X0 `- C1 f9 Z3 b. s% Z5 rA 16-month-old white child was referred to the
( a: H- t( v1 t8 a8 x/ N* {$ qendocrine clinic by his pediatrician with the concern
* ]: L) e/ B- X0 m& n2 P/ K( R6 Tof early sexual development. His mother noticed
4 ?( e4 p. Y9 i2 ?light colored pubic hair development when he was
8 a6 h" @! N" `8 |5 FFrom the 1Division of Pediatric Endocrinology, 2University of
( i) M O, Y+ x$ S3 Q0 w q4 JSouth Alabama Medical Center, Mobile, Alabama.3 `2 ~3 |1 g, g
Address correspondence to: Samar K. Bhowmick, MD, FACE,! U1 b: o0 _8 H
Professor of Pediatrics, University of South Alabama, College of
8 S/ v% Q# ?6 y& P; D- ^7 BMedicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;1 n; a2 I) `% e" M- n; M- P* L
e-mail: [email protected].& _$ {/ r' X2 S$ M4 F
about 6 to 7 months old, which progressively became) s" |, z3 v5 i/ f5 U# w7 _6 g& k3 v: N
darker. She was also concerned about the enlarge-+ f5 j/ @6 `: ~$ ?
ment of his penis and frequent erections. The child2 c( u; R6 W, w9 Z& C0 Z
was the product of a full-term normal delivery, with
* L1 E$ h, N+ f- Ya birth weight of 7 lb 14 oz, and birth length of
- d; t3 Y T( ^! D20 inches. He was breast-fed throughout the first year( g6 x9 }6 j) ~3 w- w" u: G0 e1 E
of life and was still receiving breast milk along with
6 c2 c7 S. a' m9 O) S$ u4 ~solid food. He had no hospitalizations or surgery,2 M. X' q- h* q& F4 \$ Q
and his psychosocial and psychomotor development0 y! M5 L# s& u: G
was age appropriate.' k; H G& ?: G5 `$ N2 i
The family history was remarkable for the father,
7 S ^6 z. T$ T1 {who was diagnosed with hypothyroidism at age 16,1 B5 ~& l) ?) c
which was treated with thyroxine. The father’s
3 l) f$ p1 ]) m7 ^# }4 yheight was 6 feet, and he went through a somewhat$ ?. d# E- ^; p# N
early puberty and had stopped growing by age 14.9 _9 B p9 ~9 H3 l+ i, H
The father denied taking any other medication. The. a K: L+ c1 w1 i4 I; v
child’s mother was in good health. Her menarche
% z! U& f" y9 u* s+ h' iwas at 11 years of age, and her height was at 5 feet5 C2 v( ^- M. y) ^0 H
5 inches. There was no other family history of pre-" s! W2 n; t2 \1 N/ z& P
cocious sexual development in the first-degree rela-6 x* X8 ]5 y [- _7 [# I" l
tives. There were no siblings.# l Z/ m# p. ]1 z
Physical Examination& k$ Y. y3 F# h8 }
The physical examination revealed a very active,
! t9 h/ b* f- ~' z' y: _1 Rplayful, and healthy boy. The vital signs documented
9 |2 w5 B; ?& ya blood pressure of 85/50 mm Hg, his length was
0 x$ q: \! Y9 ~( A" m9 s3 ^90 cm (>97th percentile), and his weight was 14.4 kg
+ F0 [9 d3 L' F: h9 P( o1 w(also >97th percentile). The observed yearly growth
; F+ y4 A. N8 c. i0 g6 Evelocity was 30 cm (12 inches). The examination of
) m: H' C9 m& T+ ]1 z3 K" `3 ^/ Zthe neck revealed no thyroid enlargement.6 u! r' w, g& O* z; e! K
The genitourinary examination was remarkable for s: L+ f% m& h! A( g
enlargement of the penis, with a stretched length of9 L( u, N8 l- y) M. V/ C+ j( w1 |/ c
8 cm and a width of 2 cm. The glans penis was very well5 R0 r# W0 \9 {; H
developed. The pubic hair was Tanner II, mostly around
9 d4 g; b4 `* F- ?540* U9 I$ |; [* u# O
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 r! U: u. l) z+ D; f: L9 {4 ?% z
the base of the phallus and was dark and curled. The
6 a# _ y6 n3 Y% E0 Z+ K7 ptesticular volume was prepubertal at 2 mL each.1 K# o9 f3 f5 I; t4 h9 q G
The skin was moist and smooth and somewhat% e5 N2 q' K1 d' g- z
oily. No axillary hair was noted. There were no
- J2 |, Y) P$ \3 |( n+ {abnormal skin pigmentations or café-au-lait spots.
2 g# I7 S/ l% t# _1 O% e3 cNeurologic evaluation showed deep tendon reflex 2+
' Y# a" g( V" z- b- {bilateral and symmetrical. There was no suggestion/ ?. N" e/ |) I, n
of papilledema.
& ^) h/ {: v; n" Z+ wLaboratory Evaluation5 T* D9 |/ O" Z5 F! J' [
The bone age was consistent with 28 months by
3 n; d) o! G4 pusing the standard of Greulich and Pyle at a chrono-
3 F! O3 }9 R6 }# slogic age of 16 months (advanced).5 Chromosomal
) |: P( n \- J. Ikaryotype was 46XY. The thyroid function test
- f2 m7 A' ]( |$ D* Hshowed a free T4 of 1.69 ng/dL, and thyroid stimu-
; o& |; Y$ O( M* e/ A/ \: x- Ylating hormone level was 1.3 µIU/mL (both normal).# B9 j- j5 G3 V: b' ]1 W
The concentrations of serum electrolytes, blood
% Q9 z& i+ b9 g+ Wurea nitrogen, creatinine, and calcium all were/ Z& u5 p& R% B- o* Z
within normal range for his age. The concentration, t, s) _6 y4 E9 l* F
of serum 17-hydroxyprogesterone was 16 ng/dL
' `& p8 C" T* C. d* C6 k(normal, 3 to 90 ng/dL), androstenedione was 20, j- T- i% h. o" u
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
. o, ?0 g2 R P! V4 jterone was 38 ng/dL (normal, 50 to 760 ng/dL),
0 p! `. B( ?& L- F- Ndesoxycorticosterone was 4.3 ng/dL (normal, 7 to" G5 s+ t4 R* [# G# e# P
49ng/dL), 11-desoxycortisol (specific compound S)
5 o: |& Q4 P* s1 d( E) |was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
1 F) ]( {$ ^7 N* J* A# itisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total' }+ ^1 {0 [# f
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
) `+ b; }# P* c7 W9 O& Uand β-human chorionic gonadotropin was less than' a( `4 e8 L% a7 l. a
5 mIU/mL (normal <5 mIU/mL). Serum follicular
, C& L& a* A! Z( @* B H% Dstimulating hormone and leuteinizing hormone
$ g: p/ I" h- ^concentrations were less than 0.05 mIU/mL5 N: U+ d! ]2 j/ y% C
(prepubertal).+ W1 P8 A5 _( L
The parents were notified about the laboratory
$ ?3 y0 \% ?3 Z; Yresults and were informed that all of the tests were( B+ W: e8 R" f6 b5 f3 K
normal except the testosterone level was high. The
+ ^% F4 s: }* o4 mfollow-up visit was arranged within a few weeks to
( ?# A- |3 y5 ~obtain testicular and abdominal sonograms; how-
, n' k: ?' f S2 j6 }ever, the family did not return for 4 months.2 P' G2 M1 l4 X; c7 _
Physical examination at this time revealed that the& Y6 n- P9 O/ l& V( ]
child had grown 2.5 cm in 4 months and had gained
0 H1 `( F8 x, A: P2 kg of weight. Physical examination remained
# e/ v4 z/ y* ]/ ? s3 M, J7 Cunchanged. Surprisingly, the pubic hair almost com-
6 C4 w2 y3 h- _% qpletely disappeared except for a few vellous hairs at% N+ z$ B* e2 Q
the base of the phallus. Testicular volume was still 2
. M- D% @. i8 B% l) ]) Z5 HmL, and the size of the penis remained unchanged.
" r0 R) a: `$ PThe mother also said that the boy was no longer hav-
3 r" `2 @: C; C" o9 w, u4 d- R" jing frequent erections.
( f7 [6 f' x7 B4 UBoth parents were again questioned about use of
$ g( v5 q$ E: w' E3 t Qany ointment/creams that they may have applied to
0 |. m3 o2 y0 \3 j/ vthe child’s skin. This time the father admitted the( [4 e/ w) V% M
Topical Testosterone Exposure / Bhowmick et al 541
) N& V" [& O" v; H" n5 {use of testosterone gel twice daily that he was apply-
0 [/ V7 ^, c, M8 U, g% `9 Ding over his own shoulders, chest, and back area for
9 L2 P, m1 D+ _& l- C$ qa year. The father also revealed he was embarrassed- N" H* J9 b& [$ e2 p; A
to disclose that he was using a testosterone gel pre-' `$ X" k% X1 f4 j5 D. w
scribed by his family physician for decreased libido
: G/ U2 i3 s* a+ V# @6 |7 }* _secondary to depression.# U8 B/ i+ e4 n- H) q$ h
The child slept in the same bed with parents.- w b+ Z$ g( b5 q
The father would hug the baby and hold him on his' r L9 f0 ?0 i( R' F5 }0 @
chest for a considerable period of time, causing sig-
7 w& i: s& P. x, K( Anificant bare skin contact between baby and father.
! L0 Z3 U6 T! A* o# i; X! g2 VThe father also admitted that after the phone call,
* t H* F. e7 A( Owhen he learned the testosterone level in the baby
/ s c- d- s' z/ B$ r% b" M0 V; Lwas high, he then read the product information, O% a6 D9 I7 Y: G6 r
packet and concluded that it was most likely the rea-
3 _! ?1 v0 n/ g1 C* F$ Hson for the child’s virilization. At that time, they0 R; N N2 n3 E; s# ?( s
decided to put the baby in a separate bed, and the# H- u6 ?' i7 c- ]
father was not hugging him with bare skin and had5 E% c5 D5 X3 g8 x2 w3 {5 l
been using protective clothing. A repeat testosterone
3 y* I3 I% E% `( Z! D, itest was ordered, but the family did not go to the3 ?- `" D. K6 T9 N
laboratory to obtain the test./ d& m) K" U7 V$ d7 r0 i
Discussion) Q* E0 Q' W6 j' ?+ r/ l4 y! x+ d. w
Precocious puberty in boys is defined as secondary
1 u3 d: K7 e9 j4 d: @sexual development before 9 years of age.1,4$ b, A. r* E+ K- \
Precocious puberty is termed as central (true) when$ o- J4 u+ G7 Y& V4 @" [1 m+ D8 B8 E
it is caused by the premature activation of hypo-+ O/ r7 y5 O" U( }
thalamic pituitary gonadal axis. CPP is more com- S, G7 ?1 p* i' y3 R
mon in girls than in boys.1,3 Most boys with CPP
$ ~5 S8 m% [' @: f( Rmay have a central nervous system lesion that is" l6 Q. E0 T4 r+ v
responsible for the early activation of the hypothal-
_; c9 T* I# oamic pituitary gonadal axis.1-3 Thus, greater empha-
- [0 l# Z/ n6 isis has been given to neuroradiologic imaging in
% A: C3 B$ L8 \' E: V; p; Fboys with precocious puberty. In addition to viril-
, ~2 ^1 t& B/ s( Y% ~ization, the clinical hallmark of CPP is the symmet-
+ o8 {( V5 ^" Y3 B( Yrical testicular growth secondary to stimulation by7 H# ~( D' S( v! H8 `
gonadotropins.1,3
/ G' V4 ^1 s9 T; X9 u5 e8 D( TGonadotropin-independent peripheral preco-
' L( A3 E# K# fcious puberty in boys also results from inappropriate5 a+ `3 ~% ~; ^! s" B( Q1 A
androgenic stimulation from either endogenous or, B4 l2 ^; x/ Q( h4 A6 Y
exogenous sources, nonpituitary gonadotropin stim-
3 N, C2 r( C2 [; _# kulation, and rare activating mutations.3 Virilizing
0 `/ u4 \& S% }% I3 pcongenital adrenal hyperplasia producing excessive
4 e9 X/ z+ W ]: Y5 I; k% O) U9 f+ yadrenal androgens is a common cause of precocious2 k, ?/ F3 A* U; O( s8 w" Q
puberty in boys.3,4
. B$ x) O% }6 n! U) d$ S) GThe most common form of congenital adrenal9 N7 |% x, [4 z- t
hyperplasia is the 21-hydroxylase enzyme deficiency.
6 R4 [9 J* A! o4 ~6 V& O* s2 D" YThe 11-β hydroxylase deficiency may also result in9 O4 \, A) U( A( d' o8 {) h
excessive adrenal androgen production, and rarely,
4 C+ e6 J k, ?2 l# a- _an adrenal tumor may also cause adrenal androgen
$ h3 d6 _7 V6 b1 Lexcess.1,3( t1 E; l' _7 J! J3 ^( ]
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from6 P- q4 [' x# ~5 v6 j
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
0 }3 K# E* i6 V4 U$ C% fA unique entity of male-limited gonadotropin-2 r: S9 E9 e' o, B' `5 e
independent precocious puberty, which is also known
7 C. o$ M- Q has testotoxicosis, may cause precocious puberty at a
}6 P# J* Y8 b& ~1 R5 b3 {very young age. The physical findings in these boys2 B1 w$ H( O. ^/ Z2 j4 v6 W
with this disorder are full pubertal development,7 Y5 S$ h) ?: u4 Y; w
including bilateral testicular growth, similar to boys
* z/ \4 S$ i4 b( Awith CPP. The gonadotropin levels in this disorder
9 Q! f' ^* C r: \8 ^3 Aare suppressed to prepubertal levels and do not show& Q$ F+ g' l6 N7 A0 T) H) e9 u
pubertal response of gonadotropin after gonadotropin-
I9 i9 i' ]: ^releasing hormone stimulation. This is a sex-linked# T7 k" d6 e; l. O* g; p t1 i% U" |
autosomal dominant disorder that affects only4 z0 p0 H6 v8 T# i/ J3 I2 m, ?
males; therefore, other male members of the family
# Q" L* F( v, r2 i& imay have similar precocious puberty.33 V) t9 ? X. w1 O* G- K* Y
In our patient, physical examination was incon-* X q' Z) D; X2 T% _$ C6 v0 @3 L! {
sistent with true precocious puberty since his testi-
1 _8 L' m1 L& s) icles were prepubertal in size. However, testotoxicosis
6 \* e2 p( R1 Uwas in the differential diagnosis because his father0 K! w% g# ~+ q4 s' T
started puberty somewhat early, and occasionally, c' x- L# Y1 D$ n8 w/ ^
testicular enlargement is not that evident in the
, s, y2 {8 H( u- hbeginning of this process.1 In the absence of a neg-
0 v! W) U( |( Q5 F2 g1 B2 Eative initial history of androgen exposure, our
; x, @5 _9 H" _' i; u8 wbiggest concern was virilizing adrenal hyperplasia,$ X3 J9 `" Y( c9 G K( h# Q
either 21-hydroxylase deficiency or 11-β hydroxylase
- ^0 J: z# T3 K" s9 b! L/ k3 n! X5 ldeficiency. Those diagnoses were excluded by find-5 _0 q2 Q# D- Q( w$ n- H
ing the normal level of adrenal steroids.
+ p( K. l, o0 {; D+ p4 A: nThe diagnosis of exogenous androgens was strongly6 @* F: M5 {- r0 J+ q5 _* R7 t
suspected in a follow-up visit after 4 months because
: U5 U* m5 y( Z' H, U, j9 Pthe physical examination revealed the complete disap-
' N% T7 \. L" G3 m# g I" Jpearance of pubic hair, normal growth velocity, and
0 E, h( Y7 ?! `$ edecreased erections. The father admitted using a testos-) q% A) K1 {# E8 m
terone gel, which he concealed at first visit. He was
9 m4 I( X# k: _& ~9 a0 `using it rather frequently, twice a day. The Physicians’
* d. `6 I+ _; P; v' p/ zDesk Reference, or package insert of this product, gel or
& F7 m) N( z# `: `cream, cautions about dermal testosterone transfer to3 T7 _5 q* X, h) |$ V4 o
unprotected females through direct skin exposure.
: u) W- x3 g) JSerum testosterone level was found to be 2 times the7 w1 b$ ~7 b7 ?" k" h4 z6 f; G
baseline value in those females who were exposed to
$ ?2 Y5 R4 J! L1 Z: I2 @7 N6 M0 I% K8 Eeven 15 minutes of direct skin contact with their male! U7 [" X9 U% Q7 h
partners.6 However, when a shirt covered the applica-2 Q3 R3 L2 `7 U( j+ j! u
tion site, this testosterone transfer was prevented.5 W) ~5 Z: P+ ?1 M4 S
Our patient’s testosterone level was 60 ng/mL,8 [1 b* e- b5 K% ]* V1 X- \
which was clearly high. Some studies suggest that
! |3 K3 `1 g# @8 \! `dermal conversion of testosterone to dihydrotestos-
! I7 a1 [6 [$ r1 }( y/ `1 Z0 |terone, which is a more potent metabolite, is more8 Z6 c4 l- x2 C" ?$ I
active in young children exposed to testosterone5 m! a4 _8 v" e1 O6 n" q0 D
exogenously7; however, we did not measure a dihy-
; z2 E9 Z: \! }drotestosterone level in our patient. In addition to
* d) I) E3 `# q: T8 x- Ovirilization, exposure to exogenous testosterone in! v% m' V. K7 y) A7 b# ^3 D) e
children results in an increase in growth velocity and
& A2 z; I% U) Dadvanced bone age, as seen in our patient.
4 c( G. e0 y2 \6 d8 nThe long-term effect of androgen exposure during
% I! \' I6 J- b: [) Fearly childhood on pubertal development and final3 j( I: o" N+ z" s$ M
adult height are not fully known and always remain
- S) x8 b( e; o& Oa concern. Children treated with short-term testos-+ N6 h4 @- t' [. A2 F
terone injection or topical androgen may exhibit some% y! ^; i! v, P& G: u* E
acceleration of the skeletal maturation; however, after4 w6 Q9 m' o4 U: h( s$ u8 n
cessation of treatment, the rate of bone maturation
# ]- H" u& H/ C' t' _; C$ |decelerates and gradually returns to normal.8,99 |9 e" O K$ G7 | ^
There are conflicting reports and controversy. R( J8 t, S) {# r D% `
over the effect of early androgen exposure on adult
, U# n% h- _3 I+ O8 {. h' `penile length.10,11 Some reports suggest subnormal1 s6 u: {) M f! H, @5 z% `" P
adult penile length, apparently because of downreg-
" X0 o) e' K" Y+ |* D4 @' yulation of androgen receptor number.10,12 However,
+ x7 p! Z& X7 @; P4 S9 P& x# wSutherland et al13 did not find a correlation between
$ v7 z! S0 x' `. r3 l$ ^8 \3 mchildhood testosterone exposure and reduced adult( @* h, Q/ O% O9 u5 J% M2 M
penile length in clinical studies.5 A, k8 G( ?1 n9 H) D; J2 f
Nonetheless, we do not believe our patient is
' x: H. k7 e/ q- igoing to experience any of the untoward effects from
$ }+ k& p5 }- a5 C& |- \testosterone exposure as mentioned earlier because& v9 A) G& ^0 m6 t {" i
the exposure was not for a prolonged period of time.
2 e* e1 E1 S2 G/ M) l: OAlthough the bone age was advanced at the time of+ q# ]" V3 _( \3 a% a+ f
diagnosis, the child had a normal growth velocity at
# I1 Q5 g2 r9 l$ \% S2 S: Sthe follow-up visit. It is hoped that his final adult5 P/ I) C) G5 B1 Y9 p6 U
height will not be affected.5 t9 w; x; ?- i! g; z6 T
Although rarely reported, the widespread avail-
; E# W1 E4 O% [! qability of androgen products in our society may
+ R b0 l! H$ s( ? v' O' k8 |3 Cindeed cause more virilization in male or female
& O" t }1 _6 S8 x, `children than one would realize. Exposure to andro-
2 O; v: G6 f2 a8 |- P% Ygen products must be considered and specific ques-* H m& M9 i3 [3 w U' A. H0 L5 t. q
tioning about the use of a testosterone product or
) w" I+ X8 B: {gel should be asked of the family members during4 N: w" K0 U0 y9 \! }* v
the evaluation of any children who present with vir-1 T8 }: X+ h6 k1 m% B- u3 R, V
ilization or peripheral precocious puberty. The diag-
$ q! `% h8 Q2 @$ g1 S3 |nosis can be established by just a few tests and by
4 z v; c w ?. w' sappropriate history. The inability to obtain such a0 h% W- O( T) m: I2 i
history, or failure to ask the specific questions, may
2 B2 d8 l7 U4 R8 X6 |. \% lresult in extensive, unnecessary, and expensive0 Y0 m% v: d1 |$ O1 d
investigation. The primary care physician should be; b3 u( S/ T1 [( Z: z: U
aware of this fact, because most of these children
! O2 d. V6 H0 ]! A+ U: w' n3 ^may initially present in their practice. The Physicians’ ?/ I' A) c0 {7 {
Desk Reference and package insert should also put a+ @9 @! ^( R) {
warning about the virilizing effect on a male or
; s4 |$ j( z# H* N3 f0 {female child who might come in contact with some-% {, m4 ~) W$ ~4 O: E2 L
one using any of these products.1 t% m6 C2 S+ g: J6 |" C8 ]
References3 X# T( z6 c, W, ?7 }
1. Styne DM. The testes: disorder of sexual differentiation1 x, A X0 s; S' \" E
and puberty in the male. In: Sperling MA, ed. Pediatric
M) t% ^, k0 w9 CEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
) Q3 H6 \3 P p: s7 W2 i2002: 565-628.2 T9 f$ o/ X) d' ]/ h8 i1 u
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
) w" w2 P9 c, d7 K/ c) y2 w- ^& g/ Tpuberty in children with tumours of the suprasellar pineal
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# y* A& v4 f) i& ?# Hareas: organic central precocious puberty. Acta Paediatr.
, p8 `! H7 o0 O3 w2001;90:751-756.3 C6 o- m; t$ @8 U, G$ N
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.( z% a* y" m' N
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
/ K6 m; m0 _/ z9 z# |; z' tDekker Inc; 2003:211-238.) c: a* X2 h) e5 b, n
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
/ z! K" ]) m2 B; A6 X% K. F% f* Sdevelopment in a two-year-old boy induced by topical
3 H& {# ^1 m2 A4 c5 y' q/ |exposure to testosterone. Pediatrics. 1999;104:e23.
, m T' @4 q4 Z5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
% d: J. c% e& {$ q" zSkeletal Development of the Hand and Wrist. 2nd ed.
. X# d* S7 Q& x1 z# j4 a% PStanford, CA: Stanford University Press; 1959.
, ~" {8 C; k1 k/ D+ g# ?6. Physicians’ Desk Reference. Androgel 1% testosterone,
$ ?" e( c) f& `& H5 ?1 d" FUnimed Pharmaceutical Inc. Montvale, NJ: Medical7 H' O- }1 D" P+ w
Economics Company, Inc; 2004:3239-3241.
8 }' \) {; V1 J( z7. Klugo RC, Cerny JC. Response of micropenis to topical, p9 Z; Z- M P! ]
testosterone and gonadotropin. J Urol. 1978;119:' @$ C- O' o e2 c4 P
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