- 註冊時間
- 2023-5-6
- 精華
- 在線時間
- 小時
- 米币
-
- 最後登錄
- 1970-1-1
累計簽到:5 天 連續簽到:1 天
|
發表於 2025-1-4 03:38:58
|
顯示全部樓層
is a significant concern for physicians. Central
, H3 C; z( _8 P# ~4 J2 m+ Oprecocious puberty (CPP), which is mediated
3 S$ w3 i+ [$ f8 p: y# Athrough the hypothalamic pituitary gonadal axis, has5 B- o& D% s) r9 g8 b; T2 A4 _
a higher incidence of organic central nervous system
* ? p7 V9 w" Y( p$ Blesions in boys.1,2 Virilization in boys, as manifested
9 c" w" O( ]9 pby enlargement of the penis, development of pubic
0 a2 s X( m' Y; Y9 \' Whair, and facial acne without enlargement of testi-
& ^# X1 O% u1 F) z7 t3 h/ |. Y1 Icles, suggests peripheral or pseudopuberty.1-3 We
& s, E! ?$ a2 a% n) m4 C5 m0 I& breport a 16-month-old boy who presented with the$ E( E5 u7 \7 I
enlargement of the phallus and pubic hair develop-
; D) m q5 x" t$ p- s- t+ sment without testicular enlargement, which was due
4 ^0 l- [! {& S1 Dto the unintentional exposure to androgen gel used by; A. e! q+ s" a0 g: a S
the father. The family initially concealed this infor-
9 O& J5 U5 m! p2 w3 D/ _" Z' G( imation, resulting in an extensive work-up for this
' U/ ^9 G0 |' h5 N N1 Vchild. Given the widespread and easy availability of
3 Q7 D/ `% M: E! `1 a+ _0 K' {7 _testosterone gel and cream, we believe this is proba-
9 C9 b5 Q' V- fbly more common than the rare case report in the
. P8 @6 X$ G' B. R- n2 b! e) |+ A; Eliterature.41 s4 Z; N& c% k' i
Patient Report. ?0 E* W; c, C: G& I! k0 T1 P
A 16-month-old white child was referred to the9 u( w+ k7 ?1 u
endocrine clinic by his pediatrician with the concern
5 M6 S4 h( |# m" m( M9 g N* v8 aof early sexual development. His mother noticed! H- v: i% _* I
light colored pubic hair development when he was: N" {$ P& ]2 b) c- w
From the 1Division of Pediatric Endocrinology, 2University of
. T$ D; U o% x' m6 `" N% HSouth Alabama Medical Center, Mobile, Alabama./ z/ }4 I5 Q; n
Address correspondence to: Samar K. Bhowmick, MD, FACE," n1 Y9 z1 B& X3 d3 l2 V5 N% w' @
Professor of Pediatrics, University of South Alabama, College of% b' a9 O6 b/ K+ l, f+ {
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;
7 N2 U5 g; N# C5 v& ve-mail: [email protected].2 y, q( k' N" u% s9 F1 F9 B
about 6 to 7 months old, which progressively became9 ]9 k7 n' J: u
darker. She was also concerned about the enlarge-
" O5 d* R2 A+ x: _ment of his penis and frequent erections. The child
" o) B9 \) S: P1 y- b4 cwas the product of a full-term normal delivery, with
) i0 a O9 j pa birth weight of 7 lb 14 oz, and birth length of! }/ a( j8 r' i6 Z/ F
20 inches. He was breast-fed throughout the first year& H. K- P6 }! ~
of life and was still receiving breast milk along with
0 w% m& |% P0 l+ Q9 i3 g: J( v+ ]solid food. He had no hospitalizations or surgery,
* G7 |+ L5 V; |/ }& T1 @4 { jand his psychosocial and psychomotor development
5 G* ^1 e3 T# W# G s5 nwas age appropriate.
7 B* n3 h6 W" w$ j6 EThe family history was remarkable for the father,. b2 E! k* o) P) |! F1 F k
who was diagnosed with hypothyroidism at age 16,: P7 X8 i! l% |; U7 t+ B q% _
which was treated with thyroxine. The father’s
6 ~1 W% q0 }# Gheight was 6 feet, and he went through a somewhat9 w9 }5 Q) n4 f
early puberty and had stopped growing by age 14.
( H1 m: R" J. t6 |! DThe father denied taking any other medication. The5 E8 a* r; P: E/ v, n
child’s mother was in good health. Her menarche
" w- y# i+ s% x0 |was at 11 years of age, and her height was at 5 feet; S9 E1 ^8 J, d# X0 H
5 inches. There was no other family history of pre-
* t% E+ l; k% b5 S: b7 }cocious sexual development in the first-degree rela-! r: R! X( Y* E. c
tives. There were no siblings." o( H* \, l% I+ `; N4 Q6 _6 t
Physical Examination5 |! N8 c% p# h; `6 }
The physical examination revealed a very active,3 s% ~6 J! m0 o# z% p
playful, and healthy boy. The vital signs documented( F9 o. n' _/ C* f
a blood pressure of 85/50 mm Hg, his length was: c% d! t' G+ |3 U( f
90 cm (>97th percentile), and his weight was 14.4 kg
' z7 \& l8 \: W( q3 \6 [% v(also >97th percentile). The observed yearly growth
t0 q, p; U/ w5 c( ^velocity was 30 cm (12 inches). The examination of
: n0 v! M5 p+ }( O$ R+ ^6 gthe neck revealed no thyroid enlargement." H5 V4 c) i1 N& ]9 C1 k
The genitourinary examination was remarkable for0 u0 }0 h* E8 p3 k! Q$ e8 V
enlargement of the penis, with a stretched length of
1 p0 j$ r$ d* I8 cm and a width of 2 cm. The glans penis was very well
# T' X/ }/ v, ?developed. The pubic hair was Tanner II, mostly around
: }, l1 q3 f% i2 q540
6 @+ @' ^4 L0 B7 Aat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from7 M6 M: \ t: S* `: o1 |
the base of the phallus and was dark and curled. The8 E" k! `( Z- I2 U0 P) a
testicular volume was prepubertal at 2 mL each.
( r' R3 a/ a! sThe skin was moist and smooth and somewhat* ~2 o; L) d: W0 u3 e n7 f8 }
oily. No axillary hair was noted. There were no
9 B( p( E7 @% A1 @+ b1 y& S9 b$ Mabnormal skin pigmentations or café-au-lait spots.
4 G' W$ o3 G" F8 H4 Z6 bNeurologic evaluation showed deep tendon reflex 2+
! Z7 i7 B: b* ]8 f) D* r* Sbilateral and symmetrical. There was no suggestion: M# b; W9 T6 f7 s/ y' ^2 }/ L
of papilledema.6 ^9 J8 X5 N$ F
Laboratory Evaluation
3 m7 r' D2 i* aThe bone age was consistent with 28 months by
& l4 W1 J" H3 ?2 |) pusing the standard of Greulich and Pyle at a chrono-
1 a4 ~" `9 [4 q# Q2 rlogic age of 16 months (advanced).5 Chromosomal0 I- n8 {4 d; S P, x
karyotype was 46XY. The thyroid function test* a" n* @' {* ?3 N& [
showed a free T4 of 1.69 ng/dL, and thyroid stimu-
+ Q# W8 K _( G8 |lating hormone level was 1.3 µIU/mL (both normal).
, P6 O; `% q6 O: tThe concentrations of serum electrolytes, blood
2 v2 U' Z% H8 B8 i( q% Durea nitrogen, creatinine, and calcium all were. ?" h! l% D4 f0 m4 u
within normal range for his age. The concentration
1 l9 u* g+ y2 J" Oof serum 17-hydroxyprogesterone was 16 ng/dL
% q) e u& V: I8 M0 h/ X(normal, 3 to 90 ng/dL), androstenedione was 20
* C1 o8 j( t( F$ w, Kng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-
& ^1 O- u/ K" f! Tterone was 38 ng/dL (normal, 50 to 760 ng/dL), o7 w) I$ ^, V. v7 p: w
desoxycorticosterone was 4.3 ng/dL (normal, 7 to3 t, V5 g$ _! Y
49ng/dL), 11-desoxycortisol (specific compound S)
3 p2 w# C) Q6 x- ?was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-1 K0 p" r* O3 j
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total3 m, G2 Z9 ?, b3 B9 Y: a
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),1 Q1 Q; _) g# G- k/ g
and β-human chorionic gonadotropin was less than
2 e) K6 e- D* e2 @ }2 e5 mIU/mL (normal <5 mIU/mL). Serum follicular
$ c7 H" z* N% ], h* [1 ], |stimulating hormone and leuteinizing hormone' ~! u: M" r" C" r
concentrations were less than 0.05 mIU/mL6 U3 @5 a; \9 @. v3 K" v5 I- u) K4 @
(prepubertal).
/ F6 `* r g5 n0 u6 j3 F0 ^The parents were notified about the laboratory
+ F6 s) o5 s( B9 F- ~ L N* Uresults and were informed that all of the tests were
9 x- }* [" `8 v g# _% W3 jnormal except the testosterone level was high. The+ J; H# f5 d/ {. g9 g
follow-up visit was arranged within a few weeks to. N/ S) F8 u( z4 {# \
obtain testicular and abdominal sonograms; how-
% Z9 L3 c. b" @5 p# j- zever, the family did not return for 4 months.
8 ^$ U' r- Q# M- k( n- dPhysical examination at this time revealed that the
" ` @( r8 j. I% h9 W/ A% Tchild had grown 2.5 cm in 4 months and had gained/ C4 }/ ^" _5 r$ B+ r; ~
2 kg of weight. Physical examination remained
* e- h' E3 N+ o7 e9 A. aunchanged. Surprisingly, the pubic hair almost com-
) r# d- R3 b: @# Ppletely disappeared except for a few vellous hairs at
4 r: Z2 A! ^4 q# [; o% `0 Vthe base of the phallus. Testicular volume was still 2
2 |; I! X( A7 p, VmL, and the size of the penis remained unchanged.
: L+ T9 b0 U' ~0 ?/ ]4 ?* PThe mother also said that the boy was no longer hav-; m* a5 `3 g+ h. F" \5 a( {) @
ing frequent erections.+ t0 ]& n. |8 P, [( A, O
Both parents were again questioned about use of
# E# B- F' E) v4 H# |any ointment/creams that they may have applied to* H% a) j4 \9 Z8 `& j
the child’s skin. This time the father admitted the
k- V3 v# n- Z& }2 sTopical Testosterone Exposure / Bhowmick et al 541
" F- D( n& F( Y! H9 G/ ^use of testosterone gel twice daily that he was apply-7 C9 q: b7 Q9 Z' n1 Z
ing over his own shoulders, chest, and back area for0 t0 X0 o) P V8 B0 F
a year. The father also revealed he was embarrassed
" ^( k4 {9 p4 s6 nto disclose that he was using a testosterone gel pre-
$ f) d) n. d- Mscribed by his family physician for decreased libido
9 c1 w& v, y2 r6 [- A' m% ^' Psecondary to depression.2 T* ]0 }+ `' M, \3 y) Y! n$ i
The child slept in the same bed with parents.
4 B* z, @- d5 R& X4 QThe father would hug the baby and hold him on his4 l9 j' ^8 U I. c, N- T
chest for a considerable period of time, causing sig-
& I9 _, Z9 Y1 Unificant bare skin contact between baby and father.& f Z, @% N$ s5 ?5 d7 X% l
The father also admitted that after the phone call,# J, B# r6 B5 ]
when he learned the testosterone level in the baby& i9 V: @ ]; B- o1 n: I( ?) n2 B* q: A
was high, he then read the product information
/ c" w* d2 R8 [/ ]6 K. jpacket and concluded that it was most likely the rea-
$ N8 d+ i0 a) @son for the child’s virilization. At that time, they( W3 s6 G+ E1 c x+ }! z2 l7 o
decided to put the baby in a separate bed, and the
" r& W- h: U) ?6 e' d* Q/ lfather was not hugging him with bare skin and had
, a6 J" r" O/ a/ A/ i+ [* ]been using protective clothing. A repeat testosterone
+ T u4 i- Z& Q" w! X- w: ytest was ordered, but the family did not go to the' O" u/ M y. A1 c2 M. Q4 p
laboratory to obtain the test.
+ C# w: F# H5 x9 ^Discussion
% J! K/ s. d1 h3 ]/ O$ B5 K8 cPrecocious puberty in boys is defined as secondary! D9 L5 K9 `6 F6 C2 N
sexual development before 9 years of age.1,4
! z6 W2 N+ q7 o, E0 _( k: ~Precocious puberty is termed as central (true) when* g0 o, V/ I3 `! u6 o: X, a* v
it is caused by the premature activation of hypo-" m5 P8 |2 R+ ~
thalamic pituitary gonadal axis. CPP is more com-
& }% v* L& O( X7 Y) K6 ^9 Emon in girls than in boys.1,3 Most boys with CPP
: o6 ?; O+ I" Y2 H1 p. J7 A6 @may have a central nervous system lesion that is
5 ~6 Y4 u' K8 S0 n$ n: Jresponsible for the early activation of the hypothal-
4 j! F) ]/ C2 Q8 A6 Kamic pituitary gonadal axis.1-3 Thus, greater empha-
# Z$ D) Q& F0 D, hsis has been given to neuroradiologic imaging in
& X, K$ g0 P* R- r: |/ n. }boys with precocious puberty. In addition to viril-
( N9 r4 k) ~3 Iization, the clinical hallmark of CPP is the symmet-9 O, V0 l' t$ [- h
rical testicular growth secondary to stimulation by
$ T1 K; T9 u$ s2 Ggonadotropins.1,36 i: M, j( P; Y1 \- o6 p1 N
Gonadotropin-independent peripheral preco-+ V8 O5 ^3 Q$ w& ~ O, Y
cious puberty in boys also results from inappropriate5 Z1 B, E8 a8 h7 H, L) l2 C, Y
androgenic stimulation from either endogenous or
0 i0 }8 `/ z% ~; L$ m( yexogenous sources, nonpituitary gonadotropin stim-
( o! d5 ]6 g g8 }ulation, and rare activating mutations.3 Virilizing
' M2 z" [) S C+ u. W2 o& y8 o: P0 Ocongenital adrenal hyperplasia producing excessive% S" W& @' A$ D8 n) b: I- s' d
adrenal androgens is a common cause of precocious
% X" ] ?: a& U9 Epuberty in boys.3,4) J7 y, w& J; @% x7 f
The most common form of congenital adrenal
# y: w7 G6 v8 T3 D4 mhyperplasia is the 21-hydroxylase enzyme deficiency.
& |4 |2 j. h9 v5 O4 ^The 11-β hydroxylase deficiency may also result in. h' `5 Z$ i2 R, D! b2 W
excessive adrenal androgen production, and rarely,
. F1 T7 s1 x8 l6 {an adrenal tumor may also cause adrenal androgen& G' s: H- z; K; [" `
excess.1,3* ]: K% d. D$ o
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from
$ b8 \* p4 H9 G5 [% |542 Clinical Pediatrics / Vol. 46, No. 6, July 2007: E6 Q+ x7 o. I+ Z5 K
A unique entity of male-limited gonadotropin-1 _+ n8 ?! G, f- T" _
independent precocious puberty, which is also known
9 h, g2 W, Q& b$ s. C) w! jas testotoxicosis, may cause precocious puberty at a
2 B$ i" V9 B6 \' H4 M$ Wvery young age. The physical findings in these boys
* E6 Z- e( Z6 K8 ?with this disorder are full pubertal development,, T, |! m& x* V+ |+ g$ ?6 K
including bilateral testicular growth, similar to boys
: _2 Y* U0 x$ K4 k! _" ^with CPP. The gonadotropin levels in this disorder
+ @- k5 K9 V0 n5 G4 @are suppressed to prepubertal levels and do not show
& c8 c; e" j9 [" B2 y1 n& E+ N5 Tpubertal response of gonadotropin after gonadotropin-
5 d% k H( T6 W0 Z5 [. Y" ureleasing hormone stimulation. This is a sex-linked+ X' M0 M# u6 ^8 G3 ^6 r6 g' e
autosomal dominant disorder that affects only
( u4 t2 h3 [ E8 H2 Xmales; therefore, other male members of the family
' [1 ]& ]( h) `0 X/ Vmay have similar precocious puberty.3* p0 v7 U" m+ K; Q, |9 u
In our patient, physical examination was incon-
7 t3 g0 n0 h+ u( ksistent with true precocious puberty since his testi-# W! E c; x9 C/ X/ C) M% @% X% J
cles were prepubertal in size. However, testotoxicosis
Y1 i6 `' B' o: u! L, ?0 i: wwas in the differential diagnosis because his father
0 p3 o1 g' N$ c7 C3 q1 @# estarted puberty somewhat early, and occasionally,
% K5 d8 C! F \# }8 t; jtesticular enlargement is not that evident in the
) L L, q! R0 i; J" zbeginning of this process.1 In the absence of a neg-
% ?+ @" ~: z$ W! w k4 b7 \) d @ative initial history of androgen exposure, our
! x+ }6 ]9 }& q! r( P# ~biggest concern was virilizing adrenal hyperplasia,
& M+ l( H. I2 s! yeither 21-hydroxylase deficiency or 11-β hydroxylase4 {( [# M( n+ \4 q6 {! d
deficiency. Those diagnoses were excluded by find-
$ v8 x6 d2 D" ?: p& t# t4 M# [; k, u/ Xing the normal level of adrenal steroids.; W; o$ G8 E& w
The diagnosis of exogenous androgens was strongly& R1 w5 h& `7 p4 z) G( o; e1 b: I. S
suspected in a follow-up visit after 4 months because
( k' r/ T6 H# X" {% wthe physical examination revealed the complete disap-" G$ E; _% k( Q L( y2 i% r" j+ D
pearance of pubic hair, normal growth velocity, and
) M! Z. X( [. j. A) ]$ k bdecreased erections. The father admitted using a testos-
- c. d7 N2 H! R/ {( a/ l5 r3 dterone gel, which he concealed at first visit. He was
% t/ V, p' i j$ C7 n1 Q9 Yusing it rather frequently, twice a day. The Physicians’' R( b- x$ |1 w3 \, T6 I" v$ v+ u: `4 O6 ]
Desk Reference, or package insert of this product, gel or
3 n' ^) a- k$ O5 ^. l8 ccream, cautions about dermal testosterone transfer to7 Y. H6 o& ]5 k b* m$ }
unprotected females through direct skin exposure.
& z: }- T7 z1 B v9 p3 {Serum testosterone level was found to be 2 times the
1 m! i9 M d$ C. @. _baseline value in those females who were exposed to2 d0 h/ R" m* m: U- R3 c
even 15 minutes of direct skin contact with their male1 w) i: W( S! S* o! y2 p; H& q
partners.6 However, when a shirt covered the applica-
) C, K; [' r6 R9 }# A; qtion site, this testosterone transfer was prevented.6 p ? h1 _3 O5 |
Our patient’s testosterone level was 60 ng/mL,& Y0 R! w4 m0 [' Q( O
which was clearly high. Some studies suggest that: O( D# L0 t& }& ]" |
dermal conversion of testosterone to dihydrotestos-, Y* R, X# X2 d7 }: K' E- w
terone, which is a more potent metabolite, is more5 _8 f5 q1 K" `1 Y H7 E8 J
active in young children exposed to testosterone
" g+ N6 k: Y5 G L$ K! T) `2 Xexogenously7; however, we did not measure a dihy-9 X( O, @% P: R6 R$ ~; u$ p$ V" G
drotestosterone level in our patient. In addition to* n8 a% g; T: |8 y* `# r/ Y, {# T
virilization, exposure to exogenous testosterone in _' t9 n& @. O$ w2 e
children results in an increase in growth velocity and
1 s4 C( W! Q. o( Cadvanced bone age, as seen in our patient.9 M4 H- p" K. [& p# n
The long-term effect of androgen exposure during
" }% L# u/ ?1 Y# m" u& I$ w1 a# oearly childhood on pubertal development and final
7 |" W% Q( P5 ]1 N2 Q1 |adult height are not fully known and always remain* G9 d% B+ I: K
a concern. Children treated with short-term testos-) J( q0 G: A0 W2 y1 L+ k6 k
terone injection or topical androgen may exhibit some& u8 Q3 ?* |) w) t
acceleration of the skeletal maturation; however, after
# q; G- d" {# Acessation of treatment, the rate of bone maturation
: R, T; S: u: sdecelerates and gradually returns to normal.8,9' X' k q* R7 _; y6 `: s
There are conflicting reports and controversy
) g" U4 N. G2 Mover the effect of early androgen exposure on adult
) F" f y8 j/ U' K8 k4 m1 T9 openile length.10,11 Some reports suggest subnormal
1 R2 i( a, T2 X8 T E. Oadult penile length, apparently because of downreg-$ ~3 I) l- i( I6 E; l
ulation of androgen receptor number.10,12 However,6 T+ C& ~0 C* [: t& T
Sutherland et al13 did not find a correlation between. o* s' s- L+ j+ \7 c
childhood testosterone exposure and reduced adult- {" _5 J8 t3 q* u) D- k
penile length in clinical studies.1 Z" }* k6 {; @# C2 X* X
Nonetheless, we do not believe our patient is2 m3 ~( z g. x
going to experience any of the untoward effects from1 M# P" s p. y" a) C
testosterone exposure as mentioned earlier because/ ]1 Z! U6 K4 j6 T9 _% J) M8 q" ]
the exposure was not for a prolonged period of time.1 f' L& L0 r/ p: L. U4 s
Although the bone age was advanced at the time of0 q% N8 Y1 N; D( K" n$ k
diagnosis, the child had a normal growth velocity at
' w& h7 [. }1 F5 k- p8 ~- ?the follow-up visit. It is hoped that his final adult2 Q2 O% E8 k) z. D
height will not be affected.2 e; q9 P z' w; g
Although rarely reported, the widespread avail-
! }1 [$ T0 [0 h) F/ M* [- n% T: Lability of androgen products in our society may
0 }" Z" M2 S) m& q+ h9 gindeed cause more virilization in male or female+ Z# j! g4 v5 q" ]( ^2 Z5 R2 G1 N
children than one would realize. Exposure to andro-3 h- k. ^, T2 d7 S" u& n9 l- c I) O
gen products must be considered and specific ques-) R& m& ~; f0 R: S8 k, l" b0 L
tioning about the use of a testosterone product or, W( T! a- N& M4 F: k; L4 s L
gel should be asked of the family members during, j: s2 b: X6 R1 s; H& d
the evaluation of any children who present with vir-. k* D4 m- e2 Y& [
ilization or peripheral precocious puberty. The diag-& z: t9 D5 e& Y" H6 r5 x, M
nosis can be established by just a few tests and by
7 Y3 X& \4 l% zappropriate history. The inability to obtain such a* ?3 K6 x; @9 L+ w: ~
history, or failure to ask the specific questions, may0 G" z" Q' ^1 I$ V* k- Z$ _- M% e
result in extensive, unnecessary, and expensive, O6 l- w# h, o! e" Y; B
investigation. The primary care physician should be
! Y3 c' e1 s" Eaware of this fact, because most of these children
# u9 j* p$ U# g6 Xmay initially present in their practice. The Physicians’1 j; @7 g; I: ]2 I
Desk Reference and package insert should also put a
3 y3 k0 y( g. E6 U) @) {warning about the virilizing effect on a male or
' |! X9 [, S2 s' x+ y4 q+ Kfemale child who might come in contact with some-
% m8 [: J! @% e$ d5 `) ^' jone using any of these products.
4 m2 P# X( t4 k5 n+ [7 V' nReferences
! o% e) G% L( W0 M) v) W0 d1. Styne DM. The testes: disorder of sexual differentiation
: X1 f# M0 v9 t, B+ X7 u, Aand puberty in the male. In: Sperling MA, ed. Pediatric
) ~9 S: I. ^3 D, I& Z3 uEndocrinology. 2nd ed. Philadelphia, PA: WB Saunders;
- r0 U8 \) d6 s+ z; G2002: 565-628.
+ n9 }4 p6 M9 K( {2 H) ]! j' o7 c2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious1 v: B. |6 u* I1 g
puberty in children with tumours of the suprasellar pineal
_$ Y2 S$ m- r9 Jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from h& z9 k: j5 Y( d
Topical Testosterone Exposure / Bhowmick et al 543
4 k1 f9 A9 `% D( Wareas: organic central precocious puberty. Acta Paediatr.) ~; I7 w2 g' N$ I3 \
2001;90:751-756.
* U |& H& g( e! S2 K3 U# w8 n3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed./ x, D( M% k k) O. r/ y A
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
, b2 S1 K5 g9 a- cDekker Inc; 2003:211-238.
) a$ d! j0 t7 J+ H4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual5 H! }! G0 a$ B: |; E8 R% L
development in a two-year-old boy induced by topical
2 e# S4 U" N3 w2 j- ~exposure to testosterone. Pediatrics. 1999;104:e23.
! [% q9 P$ [) x4 G/ S Z1 I5. Greulich WW, Pyle SI, eds. Radiographic Atlas of2 O0 I& ]' b1 O" C- \1 U
Skeletal Development of the Hand and Wrist. 2nd ed.2 t) ~) w( {6 Y6 Z" V) {
Stanford, CA: Stanford University Press; 1959.
@5 B9 G! S9 Z1 {- f( H7 l- _6. Physicians’ Desk Reference. Androgel 1% testosterone,- j5 P( j6 }) O% C1 H3 k0 T
Unimed Pharmaceutical Inc. Montvale, NJ: Medical
" Z F' Y/ D4 W# V( C. A! d2 yEconomics Company, Inc; 2004:3239-3241.
4 O! W; U2 M& r3 G2 | r7. Klugo RC, Cerny JC. Response of micropenis to topical9 ^: @9 a# F: ?$ N
testosterone and gonadotropin. J Urol. 1978;119:
9 ^8 L8 j j2 T4 H- s& p667-668.
5 |4 |/ n; p0 E8. Guthrie RD, Smith DW, Graham CB. Testosterone3 c5 B& u7 ]7 p; h2 i5 o; {; E, j
treatment for micropenis during early childhood. J Pediatr.
8 T1 h# l/ i5 G5 a, M7 i+ i1973;83:247-252.3 N9 o+ ~1 @1 J- y7 ^
9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone$ D7 |# g& D* H
therapy for penile growth. Urol. 1975;6:708-710.- I: N3 S* E0 x* O3 A0 |
10. Husmann DA, Cain MP. Microphallus: eventual phallic
* q$ |" D) o" H3 J5 gsize is dependent on the timing of androgen administra-8 m# _2 L* a; Z, Q+ Y
tion. J Urol. 1994;152:734-739.1 B/ z5 q% e+ j: _) B
11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
; _) U9 T" }% M* ldoes early treatment with testosterone do more harm
- b5 D" c" W! athan good? J Urol. 1995;154:825-829.
1 r3 ~8 M- M: y( L12. Takane KK, George FW, Wilson JD. Androgen receptor
5 |! s" U7 S3 ~7 q, s' sof rat penis is down-regulated by androgen. Am J Physiol.
! x& O# Z V1 o4 f" `6 G1990;258:E46-E50.1 p9 `% p2 r* r; O
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect
% _; Y5 J+ L5 y; b, oof prepubertal androgen exposure on adult penile
3 l# _* e8 l* D/ g$ ]length. J Urol. 1996;156:783-787. |
|