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Esophageal squamous cell carcinoma in six harbor seals (Phoca vitulina spp.).
[esophageal squamous cell carcinoma]
Six
cases
of
esophageal
squamous
cell
carcinoma
were
identified
in
six
captive
adult
Pacific
(
Phoca
vitulina
richardsii
;
n
=
2
)
and
Atlantic
(
Phoca
vitulina
concolor
;
n
=
4
)
harbor
seals
.
These
seals
presented
with
intermittent
dysphagia
,
regurgitation
,
inappetence
,
and
abnormal
posturing
.
Common
clinical
pathology
findings
in
these
seals
included
azotemia
,
hyperproteinemia
,
hyperglobulinemia
,
and
leukocytosis
.
Gastrointestinal
endoscopy
commonly
revealed
an
ulcerated
mass
near
the
gastroesophageal
junction
.
Each
seal
was
euthanized
(
n
=
3
)
due
to
poor
prognosis
,
subsequently
died
while
undergoing
an
anesthetic
procedure
(
n
=
2
)
,
or
found
dead
(
n
=
1
)
.
The
diagnosis
of
squamous
cell
carcinoma
was
confirmed
via
biopsy
of
esophageal
mucosa
during
endoscopy
or
histopathologic
examination
of
affected
tissues
after
necropsy
.
On
the
basis
of
clinical
and
postmortem
findings
,
esophageal
squamous
cell
carcinoma
should
be
considered
as
a
differential
diagnosis
in
aged
harbor
seals
exhibiting
clinical
signs
of
regurgitation
,
decreased
appetite
or
anorexia
,
vomiting
,
and
/
or
abnormal
posturing
.
Diseases
Validation
Diseases presenting
"dysphagia"
symptom
alexander disease
cadasil
cushing syndrome
dedifferentiated liposarcoma
dystrophic epidermolysis bullosa
epidermolysis bullosa simplex
esophageal adenocarcinoma
esophageal carcinoma
esophageal squamous cell carcinoma
familial hypocalciuric hypercalcemia
inclusion body myositis
kindler syndrome
liposarcoma
locked-in syndrome
neuralgic amyotrophy
oligodontia
triple a syndrome
well-differentiated liposarcoma
This symptom has already been validated