Solid pseudopapillary neoplasm of the ovary with metastases to the omentum and regional lymph nodes.

Extrapancreatic solid pseudopapillary neoplasms (SPNs) are rare tumors, which bear morphological, immunohistochemical, and molecular features similar to those of pancreatic counterparts. SPN occurs primarily in adolescent girls and young women. It is considered to be a malignant neoplasm with low‑grade biology. Ovarian SPNs are uncommon, have benign morphology, usually limited to the ovary and local surgical excision is curative. We report an unusual case of SPN of right ovary with extraovarian spread and metastases to lymph nodes. To the best of our knowledge, this is the second documented case of extragonadal spread of ovarian SPN.

Angiomyomatous hamartoma of lymph nodes: Clinicopathological study of 6 cases with review of literature.

Angiomyomatous hamartoma (AMH) is a rare disease with predisposition for inguinal and femoral lymph nodes. Histologically, it is characterized by replacement of lymph nodal parenchyma with irregularly distributed thick walled blood vessels, haphazardly arranged smooth muscle cells, variable amount of fat and fibrous tissue in a sclerotic lymphatic stroma. Few cases have also been reported in popliteal and sub ‑ mandibular location. The exact pathogenesis is still not known. Although this entity is very rare, its recognition is important in discriminating it from other benign and malignant vascular lesions of lymph nodes.

Intraosseous primary malignant peripheral nerve sheath tumor of the calcaneus: An unusual case and review of literature.

Malignant peripheral nerve sheath tumors (MPNSTs) are uncommon sarcomas that originate from a peripheral nerve or neurofi broma either spontaneously or in association with neurofi bromatosis type 1. MPNSTs account for approximately 5% of all soft tissue malignancies. The tumor is commonly seen in the extremities and trunk. Most of these tumors are high-grade with the potential to recur and metastasize. Common metastatic sites include the lungs, bone, and pleura. Primary intraosseous MPNST is rare, and the diagnosis of intraosseous MPNST, especially in an unusual location is diffi cult because of its cellular origin, histomorphological similarities with other sarcomas, and bone is the most common site for metastasis. We report an unusual case of MPNST of the calcaneus in a young male.