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MP/H Rules/Multiple primaries--Melanoma: How many melanoma primaries should be abstracted if, during the workup for a metastatic melanoma of an unknown cutaneous site, an in situ melanoma is also discovered? See Discussion.

MP/H Rules/Multiple primaries--Lung: Should a subsequent primary be abstracted using rule M8 for a patient diagnosed in January 2000 with adenocarcinoma of the right upper lung if the patient initially sought alternative therapies and presented in September 2007 for a right upper lobe lung mass with extension into the mediastinum, mediastinal lymph node mets and a pericardial effusion? See Discussion.

MP/H Rules/Multiple Primaries--Lung: If the biopsy for a lung primary is actually taken from a pleural mass, can the default rule "when there are several lung masses and only one lesion is biopsied, consider this a single primary" apply? See Discussion.

MP/H Rules/Multiple primaries--Lung: If a 1.7 cm LUL lung tumor is not treated surgically, would a 2.1 cm tumor in the same lobe three years later be a new primary? See Discussion.

MP/H Rules/Multiple primaries--Lung: How many primaries should be accessioned if patient has a LUL lung biopsy with squamous cell carcinoma and subsequently a station 4L node biopsy with small cell carcinoma? See Discussion.

MP/H Rules/Multiple primaries--Lung: How many primaries are to be reported for an adenocarcinoma of the lung in the right middle lobe of the lung and bronchioalveolar carcinoma, non-mucinous type in the right upper lobe? See Discussion.

MP/H Rules/Multiple primaries--Lung: How many primaries are accessioned when the right lower lobe lung has two adenocarcinomas, both with lepidic pattern, if the tumor board staged these tumors as separate primaries? See Discussion.

MP/H Rules/Multiple Primaries--Lung: Does lung MP/H Rule M6 apply to synchronous tumors only, metachronous tumors only, or both? See discussion.

MP/H Rules/Multiple primaries--Liver: How many primaries of the same site and histology are reported if tumors appear years apart but neither is surgically removed? See Discussion.

MP/H Rules/Multiple primaries--Kidney: In a patient with a history of renal cell carcinoma, would a new primary be accessioned per Rule M10 for a soft tissue mass in the renal fossa not stated to be a metastasis but that was referred to as recurrent renal cell carcinoma, clear cell per the excision pathology report? See Discussion.