Kaposiform hemangioendothelioma with Kasabach-Merritt syndrome mistaken for child abuse in a newborn.

Kaposiform hemangioendothelioma is a rare vascular neoplasm of childhood that may have an alarming and potentially misleading clinical presentation. Awareness of this entity is important to provide appropriate and immediate medical care. We report the case of a 24-day-old female newborn who presented with a large bruiselike lesion on the left leg.

Painful growth on right index finger. Subungual glomus tumor.

Glomus tumors (GT) are rare, soft-tissue tumors commonly found on the extremities. Because these tumors occur most often in the subungual region, they can be confused with other subungual pathologies including melanoma. Subungual GTs have a unique presentation and history but biopsy is diagnostic.

Chondroid tenosynovial giant cell tumor: a clinicopathological and immunohistochemical analysis of 5 new cases.

Tenosynovial giant cell tumor (TGCT) arises from the synovium of joints or tendon sheaths. Chondroid metaplasia in TGCT is rare with only 4 well-documented cases reported in the literature. The authors describe the morphological features and immunophenotype of 5 new cases of chondroid TGCT emphasizing a broader range of matrix patterns in these tumors and an expanded immunophenotype, specifically, staining for clusterin and podoplanin which have recently been found to be expressed in conventional TGCTs.

Lentigo maligna.

Lentigo maligna (LM), a melanoma in situ, is a fairly common melanocytic lesion that usually develops on the chronically sun-exposed skin of the head and neck of Caucasians. It occurs mostly in people older than 40 years, with an incidence rate that increases with age and peaks in the seventh and eighth decades of life. Its diagnosis and treatment remain challenging.