Epidermoid cyst of the brain: A common cystic lesion in rare location

Epidermoid cysts are common benign tumors comprising around 1% and 2% of all intracranial tumors. Their usual locations include the parasellar region and cerebellopontine angle, and less commonly, the Sylvian fissure, suprasellar region, cerebral, and cerebellar hemispheres. Epidermoid cysts located in the brain stem are rare. These epidermoid cysts are similar to epidermoids arising in the skin which contain cheesy and flaky-white soft pultaceous material. Epidermoid cysts are very slow-growing tumors having a similar growth pattern of the epidermal cells of the skin and develop from the remnants of epidermal elements during the closure of the neural groove and disjunction of the surface ectoderm with neural ectoderm between the 3rd and 5th weeks of embryonic life. The ideal treatment of choice is the removal of cystic components with the complete resection of the capsule. We are presenting an interesting case of an epidermoid cyst in the frontal lobe in a 42-year-old male along with radiological investigations.

Schwannoma in the nasal cavity: A benign nerve sheath tumor at an odd location

Schwannomas are neurogenic tumors arising from the Schwann cells present in the neural sheath of the myelinated nerves. These are benign tumors that can arise anywhere in the body. Schwannomas are rarely seen in the nose and paranasal sinuses representing <4% of all head-and-neck schwannomas. Surgical excision is the treatment of choice in these cases. Nasal polyps are common nasal cavity lesions which are usually inflammatory polyps. Schwannoma of the nasal cavity usually presented with headache, unilateral nasal obstruction due to mass obliterating the nasal cavity, and epistaxis. Here, we report the case of a 47-year-old female who presented with a mass in the left nasal cavity causing the nasal blockage.

Mammary analogue secretory carcinoma of the parotid: An arduous maze to solve

Mammary analogue secretory carcinoma (MASC) is an unusual and rare salivary gland malignancy that recapitulates the genetic and microscopic features of secretory carcinoma of the breast (SCB) which is an equally rare entity. MASC and SCB express S-100 protein, vimentin, mammaglobin, and harbor a t (12; 15) (p13; q25) translocation which leads to ETV6-NTRK3 fusion product. The morphology of MASC is not specific and can overlap with many salivary gland tumors. S100 and mammaglobin抯 strong positivity confirm the diagnosis of MASC. The morphology along with immunohistochemical findings provides important clues for diagnosis. Recent advances in molecular pathology help in investigating both differential diagnosis and prognosis in salivary gland oncology. Molecular testing is recommended to arrive at a diagnosis of MASC. We report a case of MASC of the parotid gland in a 47-year-old male patient with his immunohistochemical profile.

Primary DLBCL of testis: Presenting as a case of testicular mass

Primary testicular non-Hodgkin’s lymphoma (NHL) is a rare, clinically aggressive form of extranodal lymphoma and constitutes 1% of all NHL and 5% of all testicular neoplasms. The vast majority of primary testicular lymphomas (PTLs) are diffuse large B-cell lymphoma (DLBCL); however, Burkitt’s lymphoma, anaplastic lymphoma, or Hodgkin’s lymphoma may primarily involve the testis but it is less common. High inguinal orchiectomy, along with chemotherapy with or without radiotherapy, is the current treatment of choice for these tumors. Here, we present the case of primary testicular NHL in a 72-year-old male.