Diagnosis of primary hydatid cyst of thigh by fi ne needle aspiration cytology.

Hydatidosis is a parasitic infestation caused by larval form of the tapeworm, Echinococcus granulosus. Primary hydatid cyst in the skeletal muscles and subcutaneous tissue of thigh without involving thoracic and abdominal organs is an exceptional entity, even in countries where the Echinococcus infestation is endemic. We report an unusual case of primary hydatid cyst of thigh in proximity to skeletal muscles. This case illustrates that echinococcal disease should be considered in the differential diagnosis of every subcutaneous cystic mass. This case is presented here for its rarity.

Mucosal malignant melanoma of the nasal cavity.

Mucosal malignant melanoma (MMM) of the nose is extremely rare. We report a case of MMM of the nasal cavity in a 60-year-old male patient presenting with a polypoidal mass in the right nasal cavity. It was increasing gradually and obstructing breathing. A biopsy of the lesion was done with a clinical suspicion of inverted papilloma/carcinoma. Microscopy revealed features suggestive of malignant melanoma with minimal melanin pigmentation. Subsequently wide local excision was done. Diagnosis of malignant melanoma was facilitated by histochemistry and immunohistochemistry.