Pick the false statement about embryonal rhabdomyosarcoma out of the following: (A) It is seen in children younger than 5 years of age., (B) It is a malignant tumor, (C) Gross appearance and consistency of grapelike clusters, (D) Tumor cells have "tennis racket" granules inside them
Answer is D. Rhabdomyosarcoma Malignant mesenchymal tumour with skeletal muscle differentiation. IN LIGHT MICROSCOPY - tennis racket appearance is seen.(appearance, not granules of tennis shape) Three subtypes are recognized:- ALVEOLAR (20%) EMBRYONAL (60%) PLEOMORPHIC (20%). Rhabdomyosarcoma (alveolar and embryonal) is the most common soft tissue sarcoma of childhood and adolescence Embryonal rhabdomyosarcoma:- Presents as soft gray infiltrative mass. The tumor cells mimic skeletal muscle at various stages of embryogenesis and consist of sheets of both primitive round and spindled cells in a myxoid stroma. Rhabdomyoblasts with visible cross-striations may be present. Birbeck granules