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is a significant concern for physicians. Central
& _2 l7 {+ o& l r/ j+ E( d! }7 b9 Hprecocious puberty (CPP), which is mediated
: h( v+ R+ D1 E( V6 M% C! u8 Rthrough the hypothalamic pituitary gonadal axis, has+ S( K5 T2 |( X" i5 }
a higher incidence of organic central nervous system. R$ O0 B4 H( e* g, e# I
lesions in boys.1,2 Virilization in boys, as manifested
0 z D7 v, z0 m9 F/ j( X1 zby enlargement of the penis, development of pubic
1 q3 G8 H; L' v% j& B! r6 ^hair, and facial acne without enlargement of testi-3 g7 D2 p9 t4 p- F
cles, suggests peripheral or pseudopuberty.1-3 We9 E1 ^$ r& f4 D9 y" i8 t6 v
report a 16-month-old boy who presented with the
2 _: j. Z0 B/ } G- V; Venlargement of the phallus and pubic hair develop-% q4 u$ g/ d% t/ i7 O" }2 T
ment without testicular enlargement, which was due# I) m* A$ h$ U$ h+ D+ t. s0 x0 `. r; H
to the unintentional exposure to androgen gel used by$ _. x+ g& H2 K1 | \* P& Z
the father. The family initially concealed this infor-4 N; U% I0 o) e6 q, P% q4 S; J6 U
mation, resulting in an extensive work-up for this0 \. k) o8 _& e1 V; S( L% a
child. Given the widespread and easy availability of
4 a5 O6 J5 x' v5 {$ Y9 Ytestosterone gel and cream, we believe this is proba-- k% G6 }" \9 g0 g# n
bly more common than the rare case report in the) @# P2 N6 x0 j: L2 q& h
literature.4- V1 `% N5 ~( l+ C. O, z9 U7 j+ X7 q
Patient Report
; W. A: S- Z9 r) ~! f* a: V8 f; rA 16-month-old white child was referred to the
& `. b+ p L; C* I, B# ?1 Oendocrine clinic by his pediatrician with the concern6 |- v: C: @# _
of early sexual development. His mother noticed0 F% v6 w0 P9 y: y
light colored pubic hair development when he was
: O; e! R- c. EFrom the 1Division of Pediatric Endocrinology, 2University of: b2 f, |0 y* _- j" q6 ]- H
South Alabama Medical Center, Mobile, Alabama.% x5 Z- S# d$ N% t! [/ f o
Address correspondence to: Samar K. Bhowmick, MD, FACE, L% ?6 A$ D j* W
Professor of Pediatrics, University of South Alabama, College of% ]! h" o+ r% T6 L
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;' |4 `; Z, k; T/ N) O6 E, L
e-mail: [email protected].; ~* O4 ?; C- x0 n2 p
about 6 to 7 months old, which progressively became- v+ K# X, z6 P- a
darker. She was also concerned about the enlarge-" K# ~2 b" J. W0 B0 k$ ~& c
ment of his penis and frequent erections. The child/ N7 I2 L9 W! k: w- p
was the product of a full-term normal delivery, with
- l- W) |+ }3 Z9 Q: Va birth weight of 7 lb 14 oz, and birth length of: m% d8 i# n# m* `( L; l' s
20 inches. He was breast-fed throughout the first year
" b/ L' l" r$ o# [of life and was still receiving breast milk along with: e& l( b8 |# {/ G
solid food. He had no hospitalizations or surgery,; [* v, S" R/ T& E. G1 p
and his psychosocial and psychomotor development
3 w' I7 J" \, U1 [( D( f [was age appropriate.
8 D8 {5 p& e4 H3 ~The family history was remarkable for the father,
$ ` Y# R$ A- m1 v3 twho was diagnosed with hypothyroidism at age 16,7 Y! H7 N4 ^6 k% I; w9 W2 J% l
which was treated with thyroxine. The father’s, w# Z3 D6 y2 c& S9 g: m5 B
height was 6 feet, and he went through a somewhat
, P% _4 L. o, C: T+ N& vearly puberty and had stopped growing by age 14.3 K0 |8 L. N5 H$ b+ |8 K' |* N
The father denied taking any other medication. The
$ @: r- P0 R% i; Q& Fchild’s mother was in good health. Her menarche& l$ T- Y) D2 B$ G5 x+ q/ a( `
was at 11 years of age, and her height was at 5 feet
: l8 M7 \" O" v, l5 inches. There was no other family history of pre-
3 F4 \8 \7 q7 X2 _% }8 I4 }cocious sexual development in the first-degree rela-9 [ ^$ x1 s! j4 A5 f3 O8 W
tives. There were no siblings.
- U& M% F; p6 x/ }& KPhysical Examination2 L9 s& H X8 f9 s6 w
The physical examination revealed a very active,
9 ?2 ^: x! r$ z8 R4 aplayful, and healthy boy. The vital signs documented0 R* x! f, q$ H' g# I
a blood pressure of 85/50 mm Hg, his length was5 x3 K" {, e) V9 w0 K b
90 cm (>97th percentile), and his weight was 14.4 kg
; B0 L, K1 N% @. s(also >97th percentile). The observed yearly growth
+ [0 k8 W' u8 x% rvelocity was 30 cm (12 inches). The examination of
( A* {3 h1 U5 x/ H( w3 e2 ?3 Pthe neck revealed no thyroid enlargement.
9 H0 r" z5 |3 jThe genitourinary examination was remarkable for
8 d" M; D# C# N/ C! _enlargement of the penis, with a stretched length of
7 t1 v, g5 o& K$ v1 I5 @1 c8 cm and a width of 2 cm. The glans penis was very well
+ t3 w+ U4 @% H8 O5 @* N" ]developed. The pubic hair was Tanner II, mostly around5 X3 B' c7 J; D. e
5404 o9 u$ y! A7 o: y" i6 n0 k2 C( z
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
( H% x! p& m( p2 v% V( t3 Mthe base of the phallus and was dark and curled. The) ~& i- `# ]# f; t
testicular volume was prepubertal at 2 mL each./ M- E4 h# [) }6 z1 C. @. [# k
The skin was moist and smooth and somewhat$ B# S% u* u0 t% P- ]: \) V5 G$ L0 q
oily. No axillary hair was noted. There were no* ^+ } t7 V9 N4 i: ~
abnormal skin pigmentations or café-au-lait spots.$ l+ u4 K+ c/ b/ }- f8 [( s
Neurologic evaluation showed deep tendon reflex 2+7 j1 r* E6 K; {% t- L
bilateral and symmetrical. There was no suggestion. ~( l/ u$ Q3 q5 [
of papilledema.
1 I7 J+ n* L! ZLaboratory Evaluation. b- Z3 f& g% y4 `# R" Y
The bone age was consistent with 28 months by
+ ~0 i1 _- n% r1 d3 V" rusing the standard of Greulich and Pyle at a chrono-7 Q( Y( x% i: V
logic age of 16 months (advanced).5 Chromosomal
4 N h$ l; s D8 T, p. xkaryotype was 46XY. The thyroid function test
0 H' I0 g+ d* h; `& f% e9 @showed a free T4 of 1.69 ng/dL, and thyroid stimu-
4 y8 U s5 U7 \lating hormone level was 1.3 µIU/mL (both normal).
* q# O# N9 i3 N- u# z& uThe concentrations of serum electrolytes, blood/ r- l- a! q' ~% E5 i) {0 i
urea nitrogen, creatinine, and calcium all were8 X- v" u, }/ Z! r, b% [
within normal range for his age. The concentration
9 l7 ]; P( c& i, uof serum 17-hydroxyprogesterone was 16 ng/dL
/ T: B# ^- w" h, r% p(normal, 3 to 90 ng/dL), androstenedione was 200 j8 {8 T3 ?( x* b8 C$ f3 D
ng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
+ R* L* X- d( ~# ]6 eterone was 38 ng/dL (normal, 50 to 760 ng/dL),4 q* k" X* J% O
desoxycorticosterone was 4.3 ng/dL (normal, 7 to: O. f% l Z: U" p |6 L
49ng/dL), 11-desoxycortisol (specific compound S)6 x* e: \- [% _8 l
was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-
5 j F# ^, \) U& Dtisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total! t6 o. G# h+ c
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),
1 f; B/ o$ T# I# M9 ? l1 z( Mand β-human chorionic gonadotropin was less than0 I! x0 {* B+ c$ T+ Q" |! `
5 mIU/mL (normal <5 mIU/mL). Serum follicular
# b; i* E) K0 o# {9 |* [stimulating hormone and leuteinizing hormone5 E( g& i0 {, i
concentrations were less than 0.05 mIU/mL
4 X/ s* N, Z& H(prepubertal).# y$ Q' b6 o+ d; q' T
The parents were notified about the laboratory
+ U2 G. F3 p! i6 p/ P7 q5 tresults and were informed that all of the tests were" K2 U4 n- \0 q5 G* J3 ^" t9 C
normal except the testosterone level was high. The
/ p' i1 J% e( K: J4 x+ K9 tfollow-up visit was arranged within a few weeks to8 A5 k% {+ b4 X5 t8 Y: ~+ A( q
obtain testicular and abdominal sonograms; how-) z R( x' p! `7 I! ^
ever, the family did not return for 4 months.
. n6 p. B3 e1 t5 X/ k- f8 k! _: \Physical examination at this time revealed that the
" l3 @' A" R* ]+ g, F# Mchild had grown 2.5 cm in 4 months and had gained
: i6 a. X0 V4 v. l- S, t2 kg of weight. Physical examination remained7 l" W4 q. `0 g' Z! v7 i; f
unchanged. Surprisingly, the pubic hair almost com-
6 D4 M p/ l! H- u0 ~pletely disappeared except for a few vellous hairs at
/ H( x# I; z) [+ M1 C$ V9 e5 othe base of the phallus. Testicular volume was still 2) Z, f/ {* [1 g# r* a m4 i4 g
mL, and the size of the penis remained unchanged.
" F$ ^# Z2 f+ o& ?/ H: ?6 T, K. M- fThe mother also said that the boy was no longer hav-
2 @! z8 A9 o" _# ]( qing frequent erections.
$ y& ~$ }! k* w7 g! zBoth parents were again questioned about use of
$ {2 ^( X3 ]: o* ]! W W9 r' T* Jany ointment/creams that they may have applied to
9 X# y0 I6 Z5 I" Rthe child’s skin. This time the father admitted the
- S, |/ o; u& p9 L' C! kTopical Testosterone Exposure / Bhowmick et al 541
9 C+ C* ~+ H7 N S3 Z _5 Juse of testosterone gel twice daily that he was apply-$ n" E9 ]- n4 N& o$ i K* H; e0 j1 l1 h
ing over his own shoulders, chest, and back area for: G' y% E+ o7 V5 X! D) w4 z3 h( W
a year. The father also revealed he was embarrassed
% U ^/ [: \9 m2 c7 k2 c1 jto disclose that he was using a testosterone gel pre-
" T8 i: o' O: R7 x0 j' N: ]scribed by his family physician for decreased libido m$ Q4 P+ Q" j' _
secondary to depression.; G, n* U5 G" u
The child slept in the same bed with parents.
7 ~8 s# u9 @: P% S3 j' UThe father would hug the baby and hold him on his
/ s+ n* a$ o5 o/ I0 e# ichest for a considerable period of time, causing sig-
; n! p0 Y& Z$ enificant bare skin contact between baby and father.
7 O2 r9 j1 j5 K; I5 sThe father also admitted that after the phone call, E( E: e5 P9 q8 N, d' [
when he learned the testosterone level in the baby
" I2 A: Z) c; C( l6 mwas high, he then read the product information
8 j- `: z( P4 {packet and concluded that it was most likely the rea-, j9 w5 A; d* | V
son for the child’s virilization. At that time, they+ u3 ]) W) m E+ [0 _9 k( O+ m
decided to put the baby in a separate bed, and the
. i7 I7 J) P1 p! o6 d' N- R1 V2 xfather was not hugging him with bare skin and had* I6 c; Z! G# {# v* C$ W
been using protective clothing. A repeat testosterone
' A- I" G( w; R, `- T1 f2 m9 Ptest was ordered, but the family did not go to the
, t9 l9 ?; _/ j' P% P$ ilaboratory to obtain the test." a: D. t8 Z: X Y. D: I
Discussion4 J9 B2 E {" `5 X5 c* z2 j
Precocious puberty in boys is defined as secondary
( W) X9 B) ]: c. q2 Isexual development before 9 years of age.1,4, B7 B3 [" z, t, N) c+ K( ~
Precocious puberty is termed as central (true) when
- g7 \- N3 j5 m8 Git is caused by the premature activation of hypo-" \6 ~, Y$ M$ _4 ] P3 R
thalamic pituitary gonadal axis. CPP is more com-
' ]+ B( n6 i# u7 {, V7 h1 o$ T/ Qmon in girls than in boys.1,3 Most boys with CPP
9 U) k$ ^ m5 O+ j% omay have a central nervous system lesion that is5 ?* g! s) Z! Z
responsible for the early activation of the hypothal-5 U% d* p) o7 \% h
amic pituitary gonadal axis.1-3 Thus, greater empha-) F( K/ R6 `% m: h6 Q, ]4 |8 R
sis has been given to neuroradiologic imaging in# s H5 p* b3 [
boys with precocious puberty. In addition to viril-
# T$ m1 {, u$ J" [ization, the clinical hallmark of CPP is the symmet-
0 g: C, G+ y- f3 V. mrical testicular growth secondary to stimulation by! g4 ?$ N. p% W
gonadotropins.1,37 R/ L z. ~* H1 R
Gonadotropin-independent peripheral preco-' H/ g& K, k O. a
cious puberty in boys also results from inappropriate
& O/ q! s, o8 `: l, Candrogenic stimulation from either endogenous or
1 G! O$ U2 y$ \- qexogenous sources, nonpituitary gonadotropin stim-
8 ]& h& Q/ w6 j# \) oulation, and rare activating mutations.3 Virilizing( g% n; g- E# W. \2 f* Q
congenital adrenal hyperplasia producing excessive
6 p/ ~1 b- o( f9 R0 H2 Qadrenal androgens is a common cause of precocious3 c, p- l q7 v9 p! d5 p
puberty in boys.3,4
6 z1 W+ A7 Q% m" D! G# gThe most common form of congenital adrenal
) z3 z' m3 B0 M4 l' W4 V. whyperplasia is the 21-hydroxylase enzyme deficiency.' o1 w7 h- V |
The 11-β hydroxylase deficiency may also result in0 R+ o+ {3 p; p* ^. ?
excessive adrenal androgen production, and rarely,
8 {* T4 ]9 A8 d. F' V! I u1 Han adrenal tumor may also cause adrenal androgen
% O: B' w. c4 [. Jexcess.1,3
; R$ a7 E; X0 Yat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
% p/ l* H! r+ L542 Clinical Pediatrics / Vol. 46, No. 6, July 2007
g; L4 N1 X: t9 v8 yA unique entity of male-limited gonadotropin-+ N2 q; r! k& @9 m* C/ w; j: X/ [
independent precocious puberty, which is also known8 F+ \9 l- p# N8 n
as testotoxicosis, may cause precocious puberty at a
& e; k: _/ X9 r; Svery young age. The physical findings in these boys/ K) f% q; e( R7 a
with this disorder are full pubertal development,. ? y/ M+ f: n' _9 A
including bilateral testicular growth, similar to boys# A) {7 ]7 x6 I- E0 E
with CPP. The gonadotropin levels in this disorder
# p8 }/ p: @) {* m3 b! Mare suppressed to prepubertal levels and do not show$ R$ x+ ` u# Q& q
pubertal response of gonadotropin after gonadotropin-
, d6 V, w( ?# d' W& O) R$ v( Hreleasing hormone stimulation. This is a sex-linked2 _6 y( \' v! l# \) l/ [5 E
autosomal dominant disorder that affects only1 b) \2 V! T; h/ D7 ^
males; therefore, other male members of the family, X& c R9 L/ P. w, c
may have similar precocious puberty.36 D$ ^' C4 ]! D: f4 W" Z
In our patient, physical examination was incon-, b- \" A7 i3 \, ^ C
sistent with true precocious puberty since his testi-
2 \0 x( K$ \5 P9 J* {cles were prepubertal in size. However, testotoxicosis
8 _6 F# i& J5 t8 O1 `was in the differential diagnosis because his father
$ h7 J% F% \5 E9 a( Ustarted puberty somewhat early, and occasionally,
1 |. s6 j1 P& x7 ntesticular enlargement is not that evident in the
4 E, K% t% v* ^. f+ E1 e5 k+ vbeginning of this process.1 In the absence of a neg-
/ w& j* S% M5 t) \2 b% uative initial history of androgen exposure, our
3 x& q, m) A% [+ H, ^0 M6 P6 ^0 C3 ibiggest concern was virilizing adrenal hyperplasia,
% t/ [* T9 r1 F7 n$ |6 xeither 21-hydroxylase deficiency or 11-β hydroxylase
) `* [/ T" d1 p% {9 H. `: P. qdeficiency. Those diagnoses were excluded by find-
( u/ z& k3 V8 `0 Ning the normal level of adrenal steroids.- `, b& I9 Y: @6 |
The diagnosis of exogenous androgens was strongly4 W7 E1 L5 V7 a2 t5 l3 k6 l
suspected in a follow-up visit after 4 months because1 |' \4 O0 k! r3 a7 J
the physical examination revealed the complete disap-
% x. J! U4 w6 Jpearance of pubic hair, normal growth velocity, and
* B% l+ r! g* t+ Q! y/ Mdecreased erections. The father admitted using a testos-
! }( n: W% A, [) f: ~terone gel, which he concealed at first visit. He was
6 X; i- |$ R. L4 e% L8 O Jusing it rather frequently, twice a day. The Physicians’& i7 k, f0 p1 I2 }' h& N
Desk Reference, or package insert of this product, gel or g* p C! w8 r) `; ^3 @
cream, cautions about dermal testosterone transfer to
) L# j+ f4 q( q9 ]. Tunprotected females through direct skin exposure./ a v9 ?8 ]9 {) Z9 m7 S+ X$ m
Serum testosterone level was found to be 2 times the1 F8 `& @7 A9 s! ?4 t3 E
baseline value in those females who were exposed to
9 h/ P3 T* ?8 q/ A6 E) q7 S1 V9 \& ^( Eeven 15 minutes of direct skin contact with their male
# }9 v- m b" g1 S* Bpartners.6 However, when a shirt covered the applica-; ?& G, S+ F( h; k
tion site, this testosterone transfer was prevented.
+ O( n Y5 w, e% G2 F1 H' ^/ qOur patient’s testosterone level was 60 ng/mL,6 {) c) n( h$ y& r/ ^2 L$ f
which was clearly high. Some studies suggest that
& o, {& L5 h4 q7 G6 o1 h! O& [; Kdermal conversion of testosterone to dihydrotestos-
: p3 b/ ~4 H9 I* Uterone, which is a more potent metabolite, is more
* m+ C) T6 ~/ hactive in young children exposed to testosterone5 x% r8 D7 f6 Y' z, K7 J y
exogenously7; however, we did not measure a dihy-5 k' m8 i8 N2 s9 }% O6 |
drotestosterone level in our patient. In addition to# G# h2 r/ u$ a5 V: a9 e0 S! b
virilization, exposure to exogenous testosterone in' X6 i# K- F' M4 J
children results in an increase in growth velocity and
( e( H/ h4 F* a% X4 I7 oadvanced bone age, as seen in our patient.
- \$ N7 W5 g0 @, D. [# ?0 p' ^The long-term effect of androgen exposure during
0 V3 ?' ]0 I) o8 k0 rearly childhood on pubertal development and final
/ ~1 i* `! ~5 m* j; |9 {0 Gadult height are not fully known and always remain) H, t/ k2 d+ @. a
a concern. Children treated with short-term testos-$ K2 w) q% p# e6 ?5 ]/ g$ X; x( C
terone injection or topical androgen may exhibit some4 D8 H% f0 a3 N3 l9 u
acceleration of the skeletal maturation; however, after
$ @. l5 y- w; Hcessation of treatment, the rate of bone maturation0 j, E" B+ F# g6 x2 Z# ]# A
decelerates and gradually returns to normal.8,91 C# D5 G% O' D$ b
There are conflicting reports and controversy
9 x, w- _5 N1 ?+ A9 h& R9 sover the effect of early androgen exposure on adult7 f/ l) e( y$ H
penile length.10,11 Some reports suggest subnormal7 q1 }1 C1 M8 i$ N
adult penile length, apparently because of downreg-
5 i# d, a9 ~% i) `ulation of androgen receptor number.10,12 However,
% d; n7 n1 @1 zSutherland et al13 did not find a correlation between
5 }: V2 T$ S4 D' |" ^: vchildhood testosterone exposure and reduced adult
2 _' O5 {! `( W7 `! spenile length in clinical studies.
9 e. E0 |! K+ D& z9 j, S* CNonetheless, we do not believe our patient is. a2 C2 H$ D) {0 r' I
going to experience any of the untoward effects from
+ C; \; L0 @7 X" d, e. Y j8 {testosterone exposure as mentioned earlier because
4 @6 l0 ]+ V0 H3 c( Y2 J c# [the exposure was not for a prolonged period of time.
: D+ X& S( ?, s% z6 zAlthough the bone age was advanced at the time of! Y: z6 n8 \1 j% D/ a
diagnosis, the child had a normal growth velocity at
) P9 m" {! N, ]6 cthe follow-up visit. It is hoped that his final adult0 h0 _. X! z" q/ B4 v. Y
height will not be affected., h& {/ R8 @' @: @& `
Although rarely reported, the widespread avail-
' s6 \+ r! \3 e) }/ a3 f: c5 Fability of androgen products in our society may! a; b0 o0 R% R. T% y$ s
indeed cause more virilization in male or female+ L9 }6 V1 s6 b' p
children than one would realize. Exposure to andro-% N) q+ i4 w! F5 b' X/ W: B- q2 d' @
gen products must be considered and specific ques-
$ T. j" S# l i$ X1 E4 T" Ctioning about the use of a testosterone product or
/ w I+ e' t; h; o" S1 Bgel should be asked of the family members during" K/ F1 q: F6 ?. h' j) J! l
the evaluation of any children who present with vir-1 @; c5 ~8 o) d: @7 u! Y- g! A
ilization or peripheral precocious puberty. The diag-
# _, N! z4 w) {: K, r) R7 w9 hnosis can be established by just a few tests and by' S5 t. h: f( x: `* G
appropriate history. The inability to obtain such a
3 p; i/ n/ H! |( k+ P6 qhistory, or failure to ask the specific questions, may
/ ^' R; c" I# D0 f* e$ sresult in extensive, unnecessary, and expensive
! T8 o; d6 C6 [+ |) ?$ Yinvestigation. The primary care physician should be0 t9 Q- {- [' C- f3 c1 {4 W
aware of this fact, because most of these children
; c8 Q: A- k) O/ _& k( amay initially present in their practice. The Physicians’
B7 Y$ ~# O6 U: C% r, [* L: t7 O- }Desk Reference and package insert should also put a! t; Y2 H& g' [2 Z, L+ r' A
warning about the virilizing effect on a male or8 d; X8 r$ S8 t/ {! H" v- w
female child who might come in contact with some-/ D; v# Y+ r1 n) U B
one using any of these products.+ M7 J, T0 E. j. ?+ x
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Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
5 D* ^0 W" n2 W7 [$ Q+ W/ n2002: 565-628.
, |6 s" u! O. F# a$ r3 ?2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious
! e# R& ]& f1 q$ S8 L/ w. apuberty in children with tumours of the suprasellar pineal; |7 A& i' J) O0 A. a3 m& {
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/ ~2 a0 a: t$ r& j4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
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0 P) V: x0 `; Q9 Q, eexposure to testosterone. Pediatrics. 1999;104:e23.+ m) @) d. w$ k* g- s
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
( S) d# g2 x3 d; p' y0 dSkeletal Development of the Hand and Wrist. 2nd ed.
' A" q8 h p( h+ Q% pStanford, CA: Stanford University Press; 1959.3 X# {, J# H c& N. i/ J1 f1 V' Q i4 }
6. Physicians’ Desk Reference. Androgel 1% testosterone,- m& p! |! I/ X
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Economics Company, Inc; 2004:3239-3241.
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