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Progressive disease (PD): At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions; Evaluation of non-target lesions. Complete response (CR): Disappearance of all non-target lesions and normalization of tumor marker level
PET response criteria in solid tumors (PERCIST) is a set of rules that define when tumors in cancer patients improve ("respond"), stay the same ("stabilize"), or worsen ("progress") during treatment, using positron emission tomography (PET). The criteria were published in May 2009 in the Journal of Nuclear Medicine (JNM). [1]
A myeloid sarcoma (chloroma, granulocytic sarcoma, [1]: 744 extramedullary myeloid tumor) is a solid tumor composed of immature white blood cells [2] called myeloblasts. A chloroma is an extramedullary manifestation of acute myeloid leukemia ; in other words, it is a solid collection of leukemic cells occurring outside of the bone marrow .
Medulloblastomas affect just under two people per million per year, and affect children 10 times more than adults. [36] Medulloblastoma is the second-most frequent brain tumor in children after pilocytic astrocytoma [37] and the most common malignant brain tumor in children, comprising 14.5% of newly diagnosed brain tumors. [38]
Pilocytic astrocytoma (and its variant pilomyxoid astrocytoma) is a brain tumor that occurs most commonly in children and young adults (in the first 20 years of life). They usually arise in the cerebellum, near the brainstem, in the hypothalamic region, or the optic chiasm, but they may occur in any area where astrocytes are present, including the cerebral hemispheres and the spinal cord.
Retinoblastoma (Rb) is a rare form of cancer that rapidly develops from the immature cells of a retina, [2] the light-detecting tissue of the eye. [3] It is the most common primary malignant intraocular cancer in children, and 80% of retinoblastoma cases are first detected in those under 3 years old.
In dermatology, a target lesion or bull's-eye lesion, named for its resemblance to the bull's-eye of a shooting target, is a rash with central clearing. It occurs in several diseases, as follows: Target lesions are the typical lesions of erythema multiforme, in which a vesicle is surrounded by an often hemorrhagic maculopapule. Erythema ...
In children with tuberculoma, CXR is often normal despite a positive TST/IGRA. [3] Diagnosis of brain tuberculoma can be aided with PCR of cerebrospinal fluid, but is of less utility for quickly diagnosing and treating lesions. [22] When CSF is analyzed in patients with suspected tuberculoma, high protein concentrations and cell counts are ...