Test on Nonmelanocytic Skin and Soft Tissue Tumors

Question 1: Schwannoma Type A is characterized by numerous Verocay bodies.

A. Ano

B. Ne

Explanation: Pathology shows that there are two basic histological types of schwannoma called Antoni types A and B. Type A is characterized by numerous Verocay bodies.

Question 2: According to Hirsch and Helwig, which of the following is a histologic criterion for the diagnosis of Chondroid syringoma?

A. Nests of cuboidal or polygonal cells

B. Intercommunicating tubuloalveolar structures lined with a single row of cuboidal cells

C. Absence of keratinous cysts

D. A stromal component that is consistently fibrous

Explanation: Hirsch and Helwig proposed five histologic criteria for diagnosing Chondroid syringoma, and one of these is 'nests of cuboidal or polygonal cells'. The other options misrepresent or are not listed as criteria in the study material; specifically, tubuloalveolar structures are lined with 'two or more rows', 'occasional keratinous cysts' are a criterion, and a 'matrix of varying composition' is present.

Question 3: Apocrine cystadenomas commonly present as solitary, soft, dome-shaped, and translucent papules or nodules, frequently located on the eyelids.

A. Ano

B. Ne

Explanation: Apocrine cystadenomas appear most commonly as solitary, soft, dome-shaped, and translucent papules or nodules. They are located most frequently on the eyelids, especially the inner canthus.

Question 4: Which method characterizes the conservative approach for removing a trichilemmal cyst, as described in the study materials?

A. A small punch biopsy to enter the cyst cavity, followed by emptying its contents and then pulling out the cyst wall through a small incision.

B. Complete excision to remove the entire cyst and prevent potential malignant transformation.

C. Destruction of the cyst using electrocoagulation or CO2 lasers to minimize scarring.

D. Incision and drainage of the cyst, followed by electrosurgical treatment to ensure complete removal.

Explanation: The study materials state that the conservative approach for a trichilemmal cyst involves a small punch biopsy to enter the cyst cavity, emptying its contents, and then grasping and pulling out the empty cyst wall from the small incision. This method results in a very small scar and minimal bleeding.

Question 5: Dysplastic nevus clinically resembles a late-stage malignant melanoma.

A. Ano

B. Ne

Explanation: Clinically, dysplastic nevus resembles an early-stage malignant melanoma, not a late-stage one.