Staining done for sebaceous cell carcinoma –
**Core Concept**
Sebaceous cell carcinoma is a rare malignant tumor that arises from the sebaceous glands. Staining techniques play a crucial role in diagnosing this condition by highlighting specific cellular features.
**Why the Correct Answer is Right**
The correct answer is PAS (Periodic Acid-Schiff) staining. PAS staining is used to detect glycogen and other carbohydrate-containing substances in cells. In sebaceous cell carcinoma, PAS staining highlights the presence of intracellular glycogen, which is a characteristic feature of this tumor.
**Why Each Wrong Option is Incorrect**
**Option A:** H&E (Hematoxylin and Eosin) staining is a standard staining technique used in histopathology, but it is not specific for sebaceous cell carcinoma. H&E staining may not highlight the characteristic glycogen accumulation in sebaceous cell carcinoma cells.
**Option B:** Alcian blue staining is used to detect acidic mucopolysaccharides, which are not typically associated with sebaceous cell carcinoma.
**Option C:** CD117 (c-Kit) immunohistochemistry is used to identify gastrointestinal stromal tumors (GISTs), not sebaceous cell carcinoma.
**Clinical Pearl / High-Yield Fact**
Sebaceous cell carcinoma can mimic other skin lesions, such as basal cell carcinoma or squamous cell carcinoma, making accurate diagnosis crucial. PAS staining can help differentiate sebaceous cell carcinoma from other skin cancers.
**Correct Answer:** B. PAS staining.