Derm

Question 1

Basal cell tumors

Answer 1

Arise from basal layer of epidermis

Occur most commonly on the head or neck of cats

Can be cystic or pigmented

Question 2

Virus-induced papillomas

Answer 2

Most often spontaneously regress

Occur most often in young, purebred dogs

Can occur in older, immunosuppressed dogs

Question 3

Multicentric squamous cll carcinoma insitu (Bowen’s disease)

Answer 3

Occurs most often in older cats

Lesions appear as plaques or papillation with scale

Associated with chronic papillomavirus infection

NOT associated with UV light

Question 4

Which neoplasm is associated with actinic dermatitis in dogs?

Answer 4

SCC

Question 5

What clinical findings are suggestive of actinic dermatitis?

Answer 5

Erythema
Scale
Comedones
Non-healing ulcers and erosions

Question 6

Cats develop which follicular origin tumors?

Answer 6

Trichoblastoma

Question 7

Differentials for nail bed/subungual tumors?

Answer 7

SCC
Malignant melanoma
Keratocanthoma

Question 8

Two common neoplasms occurring on eyelid of dogs

Answer 8

Meibomian gland adenoma

Melanocytoma

Question 9

Hepatoid neoplasms

Answer 9

Androgen dependent

Most often adenomas (benign)

Found on the perianal skin, prepuce, or tail

Question 10

Anal sac neoplasms

Answer 10

Most often adenocarcinomas

Can be associated with hypercalcemia of malignancy

Rarely cured by excision

Question 11

T/F? In cats, melanocytic tumors occurring on the haired skin are more often malignant when compared to the dog

Answer 11

False

Question 12

Biological behavior of soft tissue sarcomas

Answer 12

Locally invasive

Low potential for metastasis

Recurrent with incomplete excision

Question 13

Feline vaccine associated tumors

Answer 13

Include a a wide variety of sarcomas

Are uniformly locally aggressive and recurrent

Can be accurately identified by histological features that include lymphocytic aggregates and macrophages containing foreign material

Question 14

Feline abdominal lymphangiosarcoma

Answer 14

Clinically appers as a diffuse area of swelling, bruising along the bentral abdomen

Is virtually impossible to resect

Carriesa very poor prognosis for survivial

Question 15

Perivascular wall tumors (PWT) in dogs

Answer 15

Include a number of variably differentiated mesenchymal tumors such as hemangiopericytomas

Often occur on the limb

Are locally aggressive and highly recurrent

Question 16

Dermal hemangiosarcoma

Answer 16

Occurs with higher incidences in Whippets and Italian Greyhounds

Occur most often in sun exposed, lightly pigmented, thinly hIRED SKIN

DO NOT DEVELOP FROM HEMANGIOMAS BUT ARE THOUGHT TO ARISE DE NOVO

Question 17

Cutaneous mass cell tumors in the dog

Answer 17

Have a highly variable clinical appearance

Are routinely assigned a histological grade used to help predict biological behavior

Have a highly degree of unpredictability if they are of intermediate differentiation

Question 18

Cutaneous mast cell tumors in the cat

Answer 18

Are not associated with splenic mast cell disease

Have no accepted grading system

Have a very low potential for malignancy and are often considered curable by excision

Question 19

Solitary cutaneous plasma cell tumor in the dog

Answer 19

Are not associated with multiple myeloma

Occur most often on the pinna, in the ear canal, or the rectum or mouth

Can have a very pleomorphic histological appearance but are benign and cured by excision

Question 20

Cutaneous epitheliotropic lymphoma in dogs and cats

Answer 20

Present with erosions and ulcers in the oral cavity about 40% of the time

Is of T lymphocyte origin

Typically presents with alopecic, exfoliative, erythematous lesions with or without plaques or nodules

Question 21

Histiocytic neoplasms and reactive proliferation of histiocytic cells occur most often in

Answer 21

Dogs

Question 22

Solitary cutaneous histiocytomas in the dog

Answer 22

Are proliferation of non-neoplastic intraepidermal dendritic cells (langerhans cells)

Occur most odten in young dogs on the head, pinna, feet, or scrotum

Regress spontaneously if left alone

Question 23

Canine cutaneous reactive histiocytosis is characterized by

Answer 23

Clinically by nodules and plaques

Waxing and waning of lesions

Histologically by sheets of large histiocytic cells mixed with other leukocytes

Question 24

Canine systemic histiocytosis

Answer 24

Has clinical and histological features that overlap with cutaneous reactive histiocytosis

Has multi organ involvement and is progressive and fatal disease

Occurs most often in Bernese Mountain Dogs, Goldens, Labs, Dobies, Rottweiler

Question 25

Disseminated histiocytic sarcoma

Answer 25

Malignancy of histiocytic dendritic cells

Was previously called malignant histiocytosis

Is a multisytemic fatal disease often involving the spleen, liver, LN , and lung

Question 26

Feline Lung Digit Syndrome

Answer 26

Unusual tendency of primary lung carcinomas in cats to metastasize to the digits

Question 27

Differentials for nodular spleen

Answer 27

Systemic histiocytosis

Malignant histiocytosis/disseminated histiocytic sarcoma

Malignant fibrous histiocytoma

Localized histiocytic sarcoma