Common Malignancies of the Skin - Mast Cell Tumors and Soft Tissue Sarcomas in Dogs and Cats

Which of the following regarding mast cell tumors is false?

Mast cell tumors are well encapsulated

Mast cell tumors most commonly occur on the trunk

Mast cell tumors can change in size

Mast cell tumors of the mucous membranes generally tend to be more aggressive

Fine needle aspirate can diagnose mast cell tumors in what percent of cases?

<76%

86%

>96%

50%

Which statement is false regarding Darier sign?

Darier sign includes change in size of the mass, oedema, erythema and inflammation of the mass and peritumoral tissues

Darier sign is associated with a better prognosis

Darier sign can occur in both dogs and cats with mast cell tumors

Darier sign is due to degranulation of mast cells

Which of the following regarding metastasis of mast cell tumors is false?

The local lymph nodes are the most common site for metastasis

The lungs are the third most common site for metastasis

Normal ultrasonographic appearance of the liver and spleen does not preclude presence of metastasis

The rate of metastasis is higher for high grade tumors

Which statement is false regarding soft tissue sarcomas?

Soft tissue sarcomas do not exfoliate well

Cytology is able to determine grade of tumor

The lymph nodes and lungs are the most common sites for metastasis

Soft tissue sarcomas appear encapsulated but this is a pseudocapsule and microextensions of tumor cells extend beyond this between fascial planes

Which of these is not considered a soft tissue sarcoma based on behaviour?

Peripheral nerve sheath tumors

Myxosarcomas

Fibrosarcomas

Synovial sarcoma

Which of the following is false regarding the behaviour of canine soft tissue sarcomas

Recurrence of STS is highly linked to tumor grade

Metastasis of STS is highly linked to tumor grade

Median time to recurrence of soft tissue sarcomas is about a year

For grade 1 soft tissue sarcoma, completeness of excision significantly improves survival time

Which of the following is not a reported poor prognostic factor for mast cell tumors in dogs?

Prepucial location

Increased histologic grade

Higher mitotic index

Presence of systemic signs

Conjunctival location

Which is true regarding prognosis of canine MCT?

A) Completely excised stage 0 low grade tumors (1 and 2a) can essentially be thought of as cured

B) For stage 2, grade 2 tumors, long survival times can still be achieved with excision of the primary tumor and lymph node and follow-up systemic chemotherapy

C) A and B

D) None of these are true

Which of the following statements is true regarding feline mast cell tumors?

Mastocytic mast cell tumors are more common than histiocytic type

Histiocytic mast cell tumors affect younger cats

Overall systemic metastasis is reported in 0-22% of feline mast cell tumors

All of the above

None of the above

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Common Malignancies of the Skin - Mast Cell Tumors and Soft Tissue Sarcomas in Dogs and Cats