… We have also seen very rare conventional smooth muscle tumors with HMB45-positive cells
(Folpe A, unpublished observation). It is unclear whether this phenomenon represents true …

Oncogenic osteomalacia (OO) is a rare paraneoplastic syndrome of osteomalacia due to
phosphate wasting. The phosphaturic mesenchymal tumor (mixed connective tissue variant)(…

Peripheral nerve sheath tumors are common neoplasms, with classic identifiable features,
but on occasion, they are diagnostically challenging. Although well-defined subtypes of …

Here's your ideal reference on the diagnosis of tumors of the skeletal muscles, connective
tissue, fat, and related structures. No other textbook matches its scope and depth of coverage …

… Soft tissue sarcomas occur more commonly in males, but gender and age-related incidences
vary among the histologic types: for instance, embryonal rhabdomyosarcoma occurs al…

Occasional glomus tumors display unusual features, such as large size, deep location,
infiltrative growth, mitotic activity, nuclear pleomorphism, and necrosis. Although a small number …

… Two other very unusual variants of EFT, with clear cell change, nuclear anaplasia, and
EWS-FEV fusions have been reported by Navarro et al 37 and Llombart-Bosch et al. Half of the 6 …

Kaposiform hemangioendothelioma (KH) is a rare tumor of childhood often associated with
Kasabach-Merritt phenomenon (KMP) and occasionally lymphangiomatosis. Although …

… Although CCST of lung may be considered the first reported example of a nonrenal, visceral
PEComa, the 1996 report by Zamboni et al [24] of a pancreatic tumor morphologically identical …

The histologic and immunohistochemical differentiation of Ewing's sarcoma/primitive
neuroectodermal tumor (ES/PNET) from other small, blue, round cell tumors may be difficult. …